JP6720883B2 - Ship - Google Patents

Description

The present invention relates to a ship equipped with a ballast water treatment device for sterilizing ballast water stored in a ballast tank of a ship by using an aqueous solution of a chlorine-based chemical as a sterilizer, more specifically, The present invention relates to a ship having a function of removing a residue.

It is used for ballast water treatment when preparing an aqueous solution of chlorine-based chemicals and sterilizing water such as seawater, brackish water, or fresh water (hereinafter sometimes referred to as “ballast water”) that should be stored in a ballast tank using the aqueous solution. An aqueous solution of a chlorine-based drug that remains without any action and/or components of the chlorine-based drug (hereinafter collectively or individually referred to as “bactericide residue”) are concentrated in a pipe by evaporation of water that is a solvent. Or, as the water temperature of the disinfectant residue decreases, the solubility of the chlorine-based drug in water decreases, so that the precipitates of the components of the chlorine-based drug are contained in the disinfectant residue or between the disinfectant residue and the pipe. It may occur in the liquid contact area, accumulate, and in some cases, the precipitate may solidify in the pipe.

Occurrence/accumulation/solidification of the above-mentioned precipitate is caused by blockage of the pipe, increase in pressure loss and other distribution obstacles, malfunctions such as malfunction of accessories such as mixer, sensor, valve, pump attached to the pipe (hereinafter, collectively, It is called a "malfunction" caused by the disinfectant residue), which in turn impedes the normal execution of ballast water treatment.

In order to solve this problem, after finishing the sterilization process of ballast water, a method of injecting the disinfectant residue into the seawater circulating in the ship and draining the ballast water in which the disinfectant residue has been injected outboard is considered. Issued (Patent Document 1)
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Japanese Patent No. 5924447

However, when the seawater infused with the disinfectant residue is discharged to the outside of the ship, unless the components having a bactericidal action (especially free available chlorine) contained in the disinfectant residue are not sufficiently detoxified, It could pollute the ocean. In particular, if the time from the injection of the disinfectant residue into seawater until the time when the seawater is drained outboard is short, detoxification of the disinfectant residue tends to be insufficient, so there is concern about marine pollution. Increase.

The object of the present invention was made in view of the above problems, and suppresses the occurrence of a factor that inhibits the normal execution of ballast water treatment using an aqueous solution obtained by dissolving a chlorine-based drug in water as a bactericide or It is an object of the present invention to provide a ship equipped with a ballast water treatment device that can prevent the damage.

To achieve the above object, a ship according to a first embodiment of the present invention includes a ballast pump for circulating seawater taken from outside the ship, a ballast tank for containing the seawater, and a ballast tank for containing the seawater. A ballast water treatment device for sterilizing the seawater, wherein the ballast pump circulates the seawater taken from outside the ship toward the ballast tank, and stores or waters the ballast tank. The operation mode of No. 1 and the second operation mode of circulating the seawater taken from the outside of the ship inside the ship are provided, and the ballast water treatment device is directed toward the ballast tank in the first operation mode. A disinfectant inlet for injecting a chlorine-based disinfectant into the circulating seawater, a disinfectant supply device having the disinfectant inlet , seawater in the second operation mode, and in the first operation mode And a residue injection port for injecting at least a part of the residue of the chlorine-based disinfectant remaining in the pipe of the disinfectant supply device into the seawater circulating in the ship.

A ship according to a second mode of the present invention is the ship according to the first mode, and the second operation mode is an operation mode started within 3 hours after the end of the first operation mode. It is characterized by

A ship according to a third aspect of the present invention is the ship according to the first aspect, wherein the residue injection port injects water urged by a pump into seawater flowing toward the outside of the ship. It is an injection port for The momentum water may be water that becomes a solvent of the aqueous solution of the chlorine-based bactericide, and water that has already become the solvent of the aqueous solution of the chlorine-based bactericide (thus, in that case, It may be an aqueous solution itself).

A ship according to a fourth aspect of the present invention is the ship according to the third aspect, wherein the water is fresh water.

A ship according to a fifth aspect of the present invention is the ship according to the fourth aspect, wherein the fresh water is fresh water obtained by desalinating seawater by a seawater desalination apparatus installed in the ship. Is characterized by.

A ship according to a sixth aspect of the present invention is the ship according to the third aspect, characterized in that the water is water containing a reducing substance.

A ship according to a seventh aspect of the present invention is the ship according to the first aspect, wherein the ballast pump causes the seawater taken from the ballast tank to flow inside the ship and drains it out of the ship. The ballast water treatment device is a device having a reducing agent injection port for injecting a reducing agent into seawater flowing from the ballast tank toward the outside of the ship in the third operation mode. , Is characterized.

A ship according to an eighth aspect of the present invention is the ship according to the seventh aspect, wherein the residue inlet is configured such that at least a part of the residue of the chlorine-based bactericide is a part of the reducing agent. It is an injection port for injecting a reaction product formed by the reaction into the seawater flowing toward the outside of the ship.

A vessel according to a ninth aspect of the present invention is the vessel according to the seventh aspect, wherein the sterilizing agent inlet also serves as the residue inlet, and the reducing agent inlet faces the outside of the vessel. It is located downstream of the residue injection port in the direction of the flow of seawater that flows through.

A ship according to a tenth aspect of the present invention is the ship according to the first aspect, wherein the chlorine-based bactericide is trichloroisocyanuric acid, sodium dichloroisocyanurate, sodium dichloroisocyanurate hydrate and dichloroisocyanuric acid. One of the aqueous solutions of potassium, and the solvent of the aqueous solution is fresh water.

A ship according to an eleventh aspect of the present invention is the ship according to the tenth aspect, wherein the fresh water is fresh water obtained by desalinating seawater by a seawater desalination apparatus installed in the ship. Is characterized by.

In the present invention, the meanings or interpretations of the terms listed below are as follows, unless otherwise explained separately.

(1) “Chlorine-based drug” means a drug that releases free effective chlorine having a bactericidal action when dissolved in water, which is a solvent, by disproportionation in an aqueous solution, or a substance that can release the free effective chlorine. The “solid” refers to a drug in the form of powder, granules or tablets at room temperature. The “chlorine drug” does not have to be “solid”.

On the other hand, typical examples of the “solid chlorine-based drug” are trichloroisocyanuric acid, dichloroisocyanuric acid, sodium dichloroisocyanuric acid and its hydrate, and chlorinated isocyanuric acid such as potassium dichloroisocyanuric acid. The “chlorine-based bactericide” is a drug that sterilizes by utilizing the bactericidal action of free available chlorine, and a typical example thereof is an aqueous solution of a chlorine-based drug.

(2) The “reducing agent” is a substance that reduces free available chlorine derived from a chlorine-based bactericide, whether it is solid or not. Representative examples of the reducing agent are sodium sulfite or a hydrate thereof, sodium thiosulfate or a hydrate thereof, or an aqueous solution thereof.

(3) “Piping path” includes piping for circulating liquids, mixtures of solids and liquids, and other substances, and fittings attached to the piping, mixers, valves, pumps and sensors, accessories such as buffer tanks. .. Even if there are no accessories attached to the pipe, the pipe corresponds to the “pipe route” and even if the only accessory attached to the pipe is the valve, the pipe and the valve are It corresponds to "route".

(4) A "container" is an article that functions as a container for containing or storing liquids, mixtures of solids and liquids, and other substances for a long time or temporarily, and the "contents of the container" are the substances. Say. Representative examples of "vessels" are tanks, dissolvers, reaction vessels and hoppers. Since the pipe is an article having a function as the container, it corresponds to the “container”, and thus the pipe path also corresponds to this.

(5) Even if “container” corresponds to “piping route” and “piping route” to “container” by definition, “container and piping route”, “container or piping route”, “container or piping route”, When clearly describing both terms in one sentence, such as "a piping path connecting to a container", the terms are to be interpreted as different from each other. For example, when describing as “a buffer tank connected to a pipe path”, the “pipe path” does not include the “buffer tank”, and the “buffer tank” does not include the “pipe path”.

(6) “Clean water” means water that does not contain salt than seawater, and is synonymous with fresh water and fresh water. Water obtained by desalinating seawater using a seawater desalination device also corresponds to fresh water.

(7) “Seawater” may be any of fresh water, brackish water and seawater, as long as it is used as ballast water contained in a ballast tank. Therefore, the seawater Wo described below is not limited to seawater, and may be fresh water or brackish water.

In the present invention, particularly in the first aspect of the present invention, at least a part of the disinfectant residue is injected into the seawater circulating in the ship, so that the seawater in which the disinfectant residue is injected can be stored in the ship, The time required for detoxification can be secured. Therefore, according to the present invention, the removal of the disinfectant residue can be carried out without fear of marine pollution.
The seawater into which the disinfectant residue is injected may be seawater that circulates via a ballast tank, or may be seawater that circulates without passing through it. In addition, the inboard circulation of seawater may be stopped or continued after the bactericide residue is injected into the seawater.

A typical example of the force for injecting at least a part of the disinfectant residue into the seawater flowing outboard is the negative pressure generated near the residue injection port due to the pressure by the pump, gravity and the flow of seawater. It is either or a combination of pressure (suction force to the seawater side).

Depending on the location where the ballast water treatment equipment is installed on the ship, the destination of the ship, the route, the time of flight, etc., the concentration of at least a part of the disinfectant residue progresses. The solubility of the drug is reduced. For example, if the function of air conditioning and ventilation in the engine room of a ship traveling directly below the equator is insufficient, the temperature of the engine room may be close to 50 degrees Celsius (in some cases, above 50 degrees Celsius). In such a ballast water treatment device installed in the engine room, the concentration of at least a part of the germicide residue progresses in a short time due to the significant evaporation of water. Even if the evaporation of water progresses slowly, if the ballast water treatment device is inactive for a long time from the first operation to the second operation, it may occur little by little. However, the concentration of the bactericide residue surely proceeds. On the other hand, if the function of air conditioning and ventilation in the engine room of a ship traveling in the middle and high latitudes is insufficient, the engine room will be less than 30 degrees Celsius, so ballast water treatment installed in such engine room. In the device, the solubility of the chlorine-based drug in water decreases as the water temperature of the germicide residue decreases.

When the concentration of at least a part of the disinfectant residue or the decrease in the solubility of the chlorine-based drug in water progresses, the precipitate of the component of the chlorine-based drug is generated in the disinfectant residue or in the disinfectant residue and the ballast water treatment. It is generated in the area that comes into contact with the components of the equipment (container, piping system, etc.), accumulates, and in some cases solidifies, causing malfunctions due to the disinfectant residue, which may prevent normal operation of ballast water treatment. It becomes an obstacle.

On the other hand, according to the second aspect of the present invention, the second operation mode is started within 3 hours after the end of the first operation mode, so that the occurrence of the operation failure due to the disinfectant residue is suppressed. Alternatively, it can be prevented, and thus the ballast water treatment can be carried out normally.

In order to suppress the generation, accumulation, and solidification of precipitates of the chlorine-based chemical components, start the second operation mode as soon as possible after the end of the first operation mode. It is more preferable to start the second operation mode within 2 hours after the end of the first operation mode, further preferably within 1 hour after the end of the first operation mode, and immediately after the end of the first operation mode. Most preferred is to start.

The bactericide residue is easily moved when subjected to water pressure, and becomes highly fluid when mixed with water or dissolved in water. Therefore, according to the third aspect of the present invention, when pouring water by the pump from the residue inlet into the seawater flowing toward the outboard, the sterilizer is added together with the water. At least a part of the residue is easily injected into the seawater and is easily discharged out of the ship (hereinafter, this effect may be referred to as "washing removal effect"). In addition, the water with the momentum may be water that becomes a solvent of an aqueous solution of a chlorine-based germicide, and water that has already become a solvent of an aqueous solution of a chlorine-based germicide (hence, in that case, the chlorine-based germicide). Aqueous solution itself).

Some chlorine-based chemicals generate chlorine-containing gas from an aqueous solution of the chlorine-based chemical. For example, in the case of chlorinated isocyanuric acid or a compound of chlorinated isocyanuric acid, a chlorine-containing gas is generated from its aqueous solution, and when the solvent of the aqueous solution is seawater, the generation of the chlorine-containing gas becomes severe. Even a small amount of chlorine-containing gas is often accompanied by an irritating odor, which deteriorates the working environment onboard the ship around the source of chlorine-containing gas.

On the other hand, according to the fourth aspect of the present invention, at least a part of the bactericide residue is made into a mixture with fresh water or an aqueous solution containing fresh water as a solvent, and the mixture is circulated from the residue injection port toward the outboard. Since it is injected into seawater, it is possible to obtain an effect of washing and removing, and at the same time, it is possible to suppress or prevent generation of chlorine-containing gas when the solvent is seawater, and eventually deterioration of working environment on board.

Many vessels have seawater desalination equipment installed to produce fresh water for use as drinking water and other domestic water for seafarers. According to the fifth aspect of the present invention, since the solvent of the aqueous solution of chlorinated isocyanuric acid is covered by the fresh water produced by using the seawater desalination apparatus installed in the ship, in order to prepare the fresh water that is the solvent It is not necessary to install the exclusive device in the limited space in the ship.

When free effective chlorine is present in the disinfectant residue, when the disinfectant residue comes into contact with a reducing substance, a reduction reaction of the free effective chlorine occurs, and a reaction product occurs near or inside the surface of the disinfectant residue. Therefore, the fluidity of the germicide residue may increase. Even when chlorine-containing gas is generated from the aqueous solution of chlorine-based chemicals and the chlorine-containing gas may deteriorate the work environment on board, it is effective to release chlorine-containing chemicals in the aqueous solution (chlorine-based germicide). If chlorine is reduced, generation of chlorine-containing gas will not occur or will be suppressed. Therefore, according to the sixth aspect of the present invention, since the reducing substance is contained in the water that is urged by the pump, it is feared that a chlorine-containing gas is generated from the aqueous solution of the chlorine-based chemical. However, the generation can be suppressed or prevented (hereinafter, this effect may be referred to as “reduction removal effect”). Further, the effect of washing and removing can be obtained.

According to the seventh aspect of the present invention, free effective chlorine derived from a chlorine-based bactericide remaining in seawater taken from a ballast tank is detoxified with a reducing agent, and then the ballast water is discharged outboard. be able to.

According to the eighth aspect of the present invention, a part of the reducing agent used for detoxifying the seawater taken from the ballast tank before discharging it out of the ship is reacted with at least a part of the disinfectant residue. Since it is used, it is not necessary to install a dedicated device for preparing the reducing substance used for the reaction with the bactericide residue in the limited and narrow space of the ship.

According to the ninth aspect of the present invention, since the germicide inlet serves also as the residue inlet, the germicide residue existing near the germicide inlet located at the end of the germicide piping path is discharged to the outside of the ship. can do. In addition, in the case of C type and D type of the second operation mode described later, at least a part of the disinfectant residue is injected into the seawater flowing toward the outside of the ship so that the disinfectant residue in the seawater concerned is injected. Since it is possible to promote the dissolution or more uniform dispersion of the chlorine, it is possible to more efficiently reduce the free available chlorine derived from the chlorine-based bactericide by the subsequent injection of the reducing agent.

According to the tenth aspect of the present invention, when an aqueous solution of chlorinated isocyanuric acid is used as the chlorine-based bactericide, since clear water is used as a solvent, generation or generation of chlorine-containing gas and deterioration of the working environment onboard the ship are suppressed or prevented. can do.

According to the eleventh aspect of the present invention, since the solvent of the aqueous solution of chlorinated isocyanuric acid is covered by the fresh water produced by using the seawater desalination apparatus installed on the ship, in order to prepare the fresh water which is the solvent. It is not necessary to install the dedicated device of the above in a ship that is not so large.

In general, according to the present invention, it is possible to realize a ship that exhibits the effects of the respective aspects of the present invention, and thereby can normally perform ballast water treatment.

It is a basic structure explanatory view of a 1st embodiment of the vessel concerning the present invention. It is explanatory drawing of the 1st operation mode of the ballast pump in 1st Embodiment of the ship which concerns on this invention. It is explanatory drawing of the 3rd operation mode of the ballast pump in 1st Embodiment of the ship which concerns on this invention. It is explanatory drawing of A type of the 2nd operation mode of the ballast pump in 1st Embodiment of the ship which concerns on this invention. It is explanatory drawing of B type of the 2nd operation mode of the ballast pump in 1st Embodiment of the ship which concerns on this invention. It is explanatory drawing of C type of the 2nd operation mode of the ballast pump in 1st Embodiment of the ship which concerns on this invention. It is explanatory drawing of D type of the 2nd operation mode of the ballast pump in 1st Embodiment of the ship which concerns on this invention. It is explanatory drawing of the removal of the disinfectant residue in 1st Embodiment of the ship which concerns on this invention. It is explanatory drawing of the modification of the removal of the disinfectant residue shown by FIG. It is explanatory drawing of another modification of the removal of the disinfectant residue shown by FIG. It is explanatory drawing of another modification of the removal of the disinfectant residue shown by FIG. It is a process flow explanatory view of the ballast water treatment method and its modification which are performed in the vessel concerning the present invention. It is a basic structure explanatory view of the 2nd Embodiment of the ship concerning the present invention. It is explanatory drawing of the 1st operation mode of the ballast pump in 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of the 3rd operation mode of the ballast pump in 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of A type of the 2nd operation mode of the ballast pump in 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of B type of the 2nd operation mode of the ballast pump in 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of C type of the 2nd operation mode of the ballast pump in 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of D type of the 2nd operation mode of the ballast pump in 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of the structural example which takes out the reducing substance from a reducing agent supply apparatus. It is explanatory drawing of another structural example which takes out a reducing substance from a reducing agent supply apparatus. It is explanatory drawing of the modification of the basic composition of 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of another modification of the basic composition of 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of the 1st operation mode of the ballast pump in another modification of the basic composition of 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of the 3rd operation mode of the ballast pump in another modification of the basic composition of 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of A type of the 2nd operation mode of the ballast pump in another modification of the basic composition of 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of B type of the 2nd operation mode of the ballast pump in another modification of the basic composition of 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of C type of the 2nd operation mode of the ballast pump in another modification of the basic structure of 2nd Embodiment of the ship which concerns on this invention. It is explanatory drawing of D type of the 2nd operation mode of the ballast pump in another modification of the basic composition of the 2nd embodiment of the vessel concerning the present invention.

Hereinafter, the present invention will be described in detail by showing embodiments or examples of the present invention. At that time, description will be given with reference to the drawings as necessary, but the same portions or corresponding or common portions in the respective drawings are denoted by the same reference numerals. Needless to say, the present invention is not limited to the embodiments and examples described in the drawings.
<First Embodiment of Ship According to the Present Invention>
1) Basic Configuration FIG. 1 is an explanatory diagram of the basic configuration of a first embodiment of a ship according to the present invention. For convenience of explanation, in FIG. 1, all the open/close valves are drawn in an open state.

As shown in FIG. 1, a ship VSL according to the present invention includes a water intake or sea chest IT, a ballast pump Pm, a ballast tank T, and a drain DO, and includes a sea chest IT, a ballast pump Pm, and a ballast pump Pm. The ballast tank T is connected, and the seawater Wo taken from the outside through the intake IT is circulated toward the ballast tank T, and the chlorine-based germicide As is injected along the way, and the chlorine-based germicide As is injected. The ballast water intake pipe line Lf for converting the seawater Ws into the ballast tank T is connected to the ballast tank T, the ballast pump Pm and the drainage port DO, and the ballast water Wt taken from the ballast tank T is directed to the drainage port DO. And the filter device F for filtering the seawater Wo flowing through the ballast water intake pipe line Lf, and the ballast water downstream of the filter device F. A disinfectant supply device S having a disinfectant injection port Is for injecting a chlorine-based disinfectant As is provided in the water intake pipe path Lf.

The ship VSL further includes a reducing agent supply device N having a reducing agent inlet In for injecting the reducing agent An into the ballast water drainage piping path Lr, and a ballast tank is provided in the middle of the ballast water drainage piping path Lr. The reducing agent An is injected into the ballast water Wt taken from T to make the reducing agent An injected ballast water Wn, and the reducing agent An injected ballast water Wn is discharged outboard through the drainage port DO. It is possible.

The ship VSL further passes seawater Wo taken from the outside through the intake IT into the ballast tank T as seawater Wd in which at least a part of the disinfectant residue Re is injected and in which the disinfectant residue Re is injected. The inboard circulation piping route Lc is provided for circulating the inside of the ship without doing so. The inboard circulation piping path Lc may be provided with a residue discharge piping path Ld that discharges the seawater Wd in which the germicide residue Re is injected to the outside of the ship through the drainage port DO without passing through the ballast pump Pm. ..

The inboard circulation piping path Lc may be provided with a piping path <Lc1> that bypasses the filter device F or with a piping path <Lc2> that is not bypassed.

The bactericide residue Re is unused chlorine-based bactericide As, which remains in the tank Ts and the bactericide pipe path Ls included in the bactericide supply device S, but it is possible to concentrate at least part of it. The substance includes at least one of a chlorine chemical ms as a raw material of the chlorine germicide As and a mixture Cs formed by mixing the chlorine chemical ms with water ws as a solvent thereof. The mixture Cs contains an aqueous solution formed by dissolving the chlorine-based drug ms in water ws.

A check valve Vcm is installed on the discharge side of the ballast pump Pm in order to prevent a backflow that may occur in the event of an abnormality such as a stop or failure of the pump.

The ballast pump Pm has at least three operation modes (first to third operation modes described below).

The operation and adjustment of the ballast pump Pm, a plurality of valves, the disinfectant supply device S, the reducing agent supply device N, and other equipment/devices are controlled unless some or all of the operations or adjustments are manually performed. It is automatically performed according to a control program preinstalled in the device PLC or another control device (not shown). For example, a ballast water intake pipe line Lf, a ballast water drainage pipe line Lr, and a ship circulation pipe line Lc (a ship equipped with a ship circulation pipe line <Lc1> and a ship circulation circuit <Lc2>). Setting of opening and closing of a plurality of open/close valves for selecting any one of the above), and in some cases for selecting the residue discharge piping path Ld, other piping from the set piping path. The change to the route and the change of the operation mode of the ballast pump Pm are automatically performed according to the control program pre-installed in the control device PLC unless some or all of the setting, changing and changing operations are manually performed. Done.

The control device PLC outputs the output Sm of the measuring device included in any or all of the ballast water intake piping path Lf, the ballast water drainage piping path Lr, the in-board circulation piping path Lc, and the residue discharge piping path Ld. Has a function of receiving, recording, monitoring, and generating a control signal Sa for controlling any other device/device based on the output Sm and transmitting the signal to the device/device, etc. It may be a supervisory control device. The output Sm is, for example, the output F(i) of the flow meter, the output Sn(j) of the TRO measuring device, and may be the output of a water temperature meter or other measuring device (not shown). The control signal Sa is, for example, a motor control signal V(k) for changing the opening and closing or opening of each valve, a motor control signal P(l) for driving a pump device including the ballast pump Pm, It may be a signal for controlling the operation of other equipment/devices.

When the operation of the equipment/devices is directly controlled based on the output of the measuring device, the operation is not controlled by the control device PLC.
2) Piping route FIG. 2 is an explanatory view of a first operation mode of the ballast pump in the first embodiment of the ship shown in FIG. 1, and FIG. 3 is a view of the ship shown in FIG. It is explanatory drawing of the 3rd operation mode of the ballast pump in 1st Embodiment. 4 to 7 are explanatory views of A type to D type in the second operation mode of the ballast pump in the first embodiment of the ship shown in FIG. 1, respectively. 2 to 7 are drawn in the open/closed state of the valve corresponding to each operation mode.

Table 1 shows the setting of opening/closing of the opening/closing valve corresponding to each of the ballast water intake pipe line Lf, the ballast water drainage pipe line Lr, and the inboard circulation pipe line Lc.

The ballast water intake pipe line Lf is the pipe line drawn in bold in FIG. 2, and is located downstream of the disinfectant inlet Is and upstream of the ballast tank T, and has seawater Wo taken from outside the ship and chlorine-based sterilization. Equipped with a mixer Mxs for promoting mixing with agent As, IT → V1 → Q6 → Pm → Vcm → Q3 → Q4 → V2 → F → Q5 → Is → Mxs → V3 → Qt → V5 → Sn1 → Ft. A check valve Vcm and a plurality of open valves (V1, V2, V3, V5) are provided in the path of →T.

The ballast water drainage pipe line Lr is a pipe line drawn in bold in Fig. 3, and is T → Ft → Sn1 → V5 → Qt → V4 → In → Mxn → Q1 → V6 → Q6 → Pm → Vcm → A check valve Vcm and a plurality of open/close valves (V4, V5, V6, V7) are provided in the path of Q3→Q4→V7→Q2→Sn2→DO.

The inboard circulation piping path Lc is a piping path through which seawater flows in the order of Pm→Q3→Q5→Mxs→Qt→Mxn→Q1→Q6→Pm, and there are two types: one that passes through the filter device F and one that does not. One of them is an inboard circulation piping path <Lc1> that does not pass through the filter device F. This is the piping route drawn in bold in FIGS. 4 and 6, and Pm→Vcm→Q3→V9→Q5→Is→Id→Mxs→V3→Qt→V4→In→Mxn→Q1→V6 -> Q6 -> Pm is equipped with multiple open valves (V3, V4, V6, V9). The other is an inboard circulation piping path <Lc2> that passes through the filter device F. This is the piping route drawn in bold in FIGS. 5 and 7, and Pm→Vcm→Q3→Q4→V2→F→Q5→Is→Id→Mxs→V3→Qt→V4→Mxn→In → Q1 → V6 → Q6 → Pm is equipped with multiple open valves (V2, V3, V4, V6).

The residue discharge piping path Ld is a piping path that connects the position Q1 and the position Q2 without passing through the ballast pump Pm, and is equipped with a valve V8 between the position Q1 and the position Q2. .. If this is used, the contents (including seawater in which the disinfectant residue has been injected) present in the inboard circulation piping path Lc can be discharged to the outside of the ship without passing through the ballast pump Pm.

Here, the position Q1 is located downstream of the mixer Mxn and upstream of the valve V8, and the position Q2 is located downstream of the valve V8 and upstream of the drain port DO. The position Q4 is between the valve V7 and the valve V2, and the position Q3 is downstream of the ballast pump Pm and upstream of the position Q4. The position Q5 is located downstream of the filter device F and upstream of the residue injection port Id. The valve V8 is in the piping path Q1→Q2 that does not pass through the ballast pump Pm, and the valve V9 is in the piping path Q3→Q5 that does not pass through the filter device F. The position Q6 is located downstream of the valve V1 and upstream of the ballast pump Pm, and is located between the valve V1 and the valve V6. The position Qt is located downstream of the valve V3 and upstream of the valve V5 in the case of the ballast water intake piping route Lf, and downstream of the valve V5 and upstream of the valve V4 in the case of the ballast water drainage piping route Lr. ..

Both the inboard circulation piping route <Lc1> and the inboard circulation piping route <Lc2> are provided with a residue injection port Id in the piping route. The residue injection port Id injects at least a part of the disinfectant residue Re remaining in the piping path Ls included in the disinfectant supply device S into the seawater Wo that is taken from outside the ship that flows through the inboard circulation piping path Lc. The injection port may be a common injection port with the disinfectant injection port Is, and may be arranged upstream or downstream of the disinfectant injection port Is. A typical example of the inlet is a discharge nozzle or a discharge opening.

The ballast water intake pipe line Lf is equipped with multiple sensors (TRO measuring device Sn1, flow meter Ft), and the ballast water drainage piping route Lr is equipped with multiple sensors (TRO measuring device Sn1, Sn2, flow meter Ft). In addition, the inboard circulation piping route Lc includes the TRO measuring device Sn2, but these are merely examples. Each piping path may be provided with other devices/apparatuses not shown.

Each setting of the piping path Lf for ballast water intake, the piping path Lr for ballast water drainage and the piping path Lc for ship circulation (the piping path for ship circulation <Lc1> and the piping path for ship circulation <Lc2>) and the set piping path To another piping route, manually based on the opening/closing setting of the open/close valve shown in Table 1 or according to a control program previously installed in the control device PLC or another control device not shown. It is automatically performed under the control of the control device PLC or other control device.

Each piping path may further include a check valve (not shown) other than the check valve Vcm and a manual valve for maintenance service.
3) Disinfectant supply device S
3.1) Basic configuration As shown in FIG. 1, the disinfectant supply device S is filled with a chlorine-based chemical ms and water ws that is a solvent for the chlorine-based chemical ms, and a tank Ts for storing both, and a sterilizer. It is provided with an agent injection port Is and a disinfectant piping path Ls connecting the tank Ts and the disinfectant injection port Is. The disinfectant inlet Is is an outlet such as a discharge nozzle and a discharge opening for injecting the chlorine-based disinfectant As into the seawater Wo taken from the outside of the ship that flows through the ballast water intake pipe line Lf. The disinfectant piping path Ls is provided with a pump Ps downstream of the tank Ts and upstream of the disinfectant inlet Is, and a valve Vs downstream of the pump Ps and upstream of the disinfectant inlet Is, Ts→Ps→Fs→Vs→ This is the piping route for Is.

The germicide supply device S further includes a tank Ts, a residue injection port Id, and a residue piping path Ls* connecting the tank Ts and the residue injection port Id. The residue piping path Ls* is provided with a pump Ps downstream of the tank Ts and upstream of the residue injection port Id, downstream of a position Qs between the pump Ps and the valve Vs, and upstream of the residue injection port Id. , Ts→Ps→Fs→Qs→Vd→Id. The residue pipe line Ls* is the same as the disinfectant pipe line Ls from the tank Ts to the position Qs, and is branched from the position Qs and connected to the residue injection port Id.

The disinfectant supply device S is such that the distance between the position Qs and the disinfectant inlet Is and the distance between the position Qs and the valve Vs are as small as possible, and thereby the position Qs and the disinfectant inlet Is. It is designed and manufactured so that the amount of the bactericide residue Re that can remain between them is reduced. Further, the tank Ts may be equipped with a stirrer Sts (not shown) for promoting the mixing of the chlorine-based chemical agent ms with the water ws and the dissolution in the water ws. A typical example of the stirrer is an impeller stirrer.

Switching between the disinfectant pipe line Ls and the residue pipe line Ls* is performed by switching between opening and closing of the valves Vs and Vd. When selecting the disinfectant piping path Ls, the valve Vs is opened and the valve Vd is closed. When selecting the residue piping path Ls*, the valve Vs is closed and the valve Vd is opened. Such switching of opening and closing of the valves Vs, Vd is performed by a control device PLC or a control device installed in advance in another control device (not shown) unless a part or all of the switching operation is manually performed. Automatically according to the program.

The disinfectant supply device S is equipped with a flowmeter Fs in the disinfectant piping route Ls, but is not shown in the disinfectant piping route Ls and the residue piping route Ls*. May be provided. In addition, the disinfectant supply device S is provided with a check valve Vcs (not shown) for preventing a backflow that may occur in an abnormal state such as a stop or failure of the pump Ps, on the discharge side of the pump Ps, and upstream of the position Qs. Alternatively, a non-illustrated check valve other than the check valve Vcs and a manual valve for maintenance service may be provided in the disinfectant piping path Ls and the residue piping path Ls*.

For example, when the injection pressure of the chlorine-based disinfectant As to the seawater Wo taken from the outboard from the disinfectant inlet Is is insufficient, the disinfectant piping path Ls is downstream of the valve Vs, the disinfectant inlet Is of A bactericide injection pump Pis (not shown) may be provided upstream, and when a bactericide injection pump Pis (not shown) is provided, the bactericide injection pump Pis is downstream (discharge port side). A back pressure valve may be provided upstream of the germicide inlet Is. Further, when the injection pressure of the disinfectant residue Re into the seawater Wo taken from the outboard from the residue injection port Id is insufficient, the residue piping route Ls* is located downstream of the valve Vd and the residue injection port Id. May be provided with a residue injection pump Pid (not shown) upstream thereof, or with a back pressure valve downstream (discharge port side) of the residue injection pump Pid and upstream of the residue injection port Id. Good.

When the valve Vs is open and the valve Vd is closed, the sterilant injection pump Pis is in the operating state, the residue injection pump Pid is in the inactive state, and the valve Vs is closed and the valve Vd is When it is open, the disinfectant injection pump Pis is switched to the inoperative state, and the residue injection pump Pid is switched to the activated state. Such switching of the operating state of the pump is performed according to a control program pre-installed in the control device PLC or other control device (not shown) unless a part or all of the switching operation is manually performed. It is done automatically.

In addition, the disinfectant piping path Ls transfers a part or all of the content Cs from a position Qs0 (not shown) downstream of the pump Ps to a position Qs1 (not shown) upstream of the pump Ps. A return piping path Lsr (not shown) for returning a part or all of the above may be provided. The position Qs0 is a position downstream of the pump Ps, or a position or position Qs upstream of the position Qs, and the position Qs1 is a position of the tank Ts or the position downstream of the tank Ts or upstream of the pump Ps. An example of the return piping path Lsr is that at the position Qs0, the return piping path Lsr branches off from the disinfectant piping path Ls in a branch shape, and at least a part of the contents Cs flowing through the disinfectant piping path Ls is always the return piping path Lsr. It is a piping path configured to flow through. Another example of the return piping path Lsr is provided with a solid-liquid separation device represented by a liquid cyclone at the position Qs0, and the undissolved chlorine-based chemical ms is configured to flow along with the water ws into the return piping path Lsr. It is a certain piping route. In both examples, by closing the valve Vs and the valve Vd, the entire content Cs returns to the position Qs1 by the return piping path Lsr, and by adjusting the opening degree of the valve Vs and the valve Vd, the position Qs1. It is constructed so that the amount of contents Cs is determined. When removing the disinfectant residue Re from the disinfectant piping route Ls, at least a part of the return piping route Lsr, which is a part of the disinfectant piping route Ls, constitutes a part of the residue piping route Ls*. ..
3.2) Chlorine-based disinfectant A typical example of the chlorine-based agent ms that is a raw material of the chlorine-based disinfectant As is a solid chlorine-based agent, and representative examples of the solid chlorine-based agent are trichloroisocyanuric acid and dichloroisocyanuric acid. Acid, sodium dichloroisocyanurate and its hydrates, and compounds of chlorinated isocyanuric acid or chlorinated isocyanuric acid such as potassium dichloroisocyanurate, and typical examples of the chlorine-based bactericide As are trichloroisocyanuric acid and dichloroisocyanuric acid. An aqueous solution of any one of sodium acid salt, sodium dichloroisocyanurate hydrate and potassium dichloroisocyanurate.

When the solubility of the solid chlorine-based drug ms in water is low, it takes time to dissolve the solid chlorine-based drug ms in water ws. The concentration of free effective chlorine in the aqueous solution of the chlorine-based drug does not increase and chlorine-based sterilization is not performed. There arises a problem that the role as the agent As cannot be sufficiently fulfilled. In such a case, the water temperature of the water ws using a suitable heating device or the temperature of the mixture Cs formed by mixing the solid chlorine-based drug ms with the water ws is increased, or the mixture is mixed using a suitable stirring device. By stirring Cs more strongly, a necessary amount of an aqueous solution An having a free effective chlorine concentration required as a bactericide is prepared. Further, by adopting the disinfectant supply device S equipped with the return piping path Lsr to the disinfectant piping path Ls, by increasing the number of times the mixture Cs is strongly stirred by the pump Ps, the solid chlorine-based drug ms is dissolved in the water ws. May be promoted.
3.3) Water ws
The water ws may be seawater or non-seawater. However, when the chlorine-based chemical ms or the bactericide residue Re becomes a source of chlorine-containing gas due to contact with seawater, the water ws is fresh water.

When using fresh water as water ws, the fresh water may be fresh water previously stored in an exclusive storage tank onboard the ship, or may be produced using a seawater desalination apparatus installed onboard the ship. However, the latter is more preferable because it is not necessary to install a dedicated storage tank like the former in the ship. Therefore, when the chlorine-based drug ms is trichloroisocyanuric acid, dichloroisocyanuric acid, sodium dichloroisocyanurate and its hydrate, or chlorinated isocyanuric acid such as potassium dichloroisocyanurate, the water ws is clear water.
3.4) Sterilization When the ballast water intake pipe line Lf and the disinfectant pipe line Ls are set, the chlorine-based chemical ms is mixed with water ws by the pump Ps as shown in FIG. The resulting mixture Cs is discharged from the tank Ts, and the mixture Cs is strongly stirred to create an aqueous solution (chlorine disinfectant) As of a chlorine-based disinfectant, and the chlorine-based disinfectant As is sterilized through the disinfectant piping path Ls. From the agent injection port Is, the ballast water intake pipe line Lf is injected into the seawater Wo that has been taken from the outside of the ship, and is sterilized.
3.5) Removal of disinfectant residue During the removal of the disinfectant residue Re, chlorine-based drug ms is not injected into the tank Ts.
(A) Forced removal When the inboard circulation piping line Lc is set, at least a part of the disinfectant residue Re remaining in the disinfectant piping path Ls including the tank Ts is removed by the pump Ps from the residue piping. From the residue injection port Id through the route Ls*, the seawater Wo taken from outside the ship flowing in the inboard circulation piping route Lc is injected and removed.

Regarding the bactericide residue Re that may remain between the position Qs and the residue injection port Id, this is a negative pressure due to the circulation of seawater Wo taken from outside the ship that circulates in the inboard circulation piping route Lc. Thus, the residue is moved from the inlet Id side to the seawater Wo side and removed. In that case, if necessary, the valve Vs may be temporarily opened to promote the movement.
(B) Utilization of Washing Removal Effect When the residue piping path Ls* is set, as shown in FIGS. 4 to 7, water ws is stored in the tank Ts in advance, or the water is transferred to the tank Ts. While continuing to inject the water ws, the water ws is discharged from the tank Ts by the pump Ps, and is urged to flow through the residue piping path Ls*. The tank Ts is included by utilizing that the fluidity of the disinfectant residue Re is improved by the momentum of the water ws and/or through the mixing or the dissolution of the disinfectant residue Re with the water ws. At least a part of the disinfectant residue Re remaining in the disinfectant piping path Ls is injected from the residue injection port Id into the seawater Wo taken from outside the ship circulating in the inboard circulation piping path Lc and removed. To do.

In order to promote the dissolution of the disinfectant residue Re into water ws, the water temperature of the water ws and the temperature of the mixture of the disinfectant residue Re and water ws are set within the heat resistant temperature range of the residue piping route Ls*, and The amount may be increased as long as the generation of chlorine-containing gas can be dealt with.

In the case where the disinfectant piping path Ls includes the return piping path Lsr, in order to remove at least a part of the disinfectant residue Re remaining in the return piping path Lsr, first, the valve Vs and the valve Vd are temporarily provided. Is closed, the water ws is returned from the position Qs0 to the position Qs1, or circulated between the position Qs0 and the position Qs1, thereby, the fluidity of the germicide residue Re remaining in the return piping path Lsr, Improve by the momentum of water ws and/or by mixing or dissolving with water ws. After that, the valve Vs is closed and the valve Vd is opened, and at least a part of the germicide residue Re may be injected from the residue injection port Id into the seawater Wo taken from the outside of the ship.
(C) Utilization of Reduction and Removal Effect FIG. 8 is an explanatory diagram of a modified example of removal of the disinfectant residue. Referring to FIG. 8, in the sterilizer supply device S shown in FIGS. 4 to 7, description will be made on the case where the reducing substance An* is injected from the position Qn into the residue piping route Ls*. To do. Here, the position Qn is at least one of a position upstream of the tank Ts in the piping route for supplying the water ws, a position downstream of the tank Ts and the tank Ts, and a position in the middle of the residuals piping route Ls*. Here, the position Qn is, as shown in FIG. 8, a position upstream of the tank Ts in the piping path for supplying (c1) water ws, but is not limited to this, and the position of the (c2) tank Ts is not limited to this. Or (c3) at a position (not shown) downstream of the tank Ts or in the middle of the residual substance piping path Ls*, and at three positions, that is, at a plurality of positions among (c1) to (c3). May be.

When the free effective chlorine in the disinfectant residue Re remaining in the tank Ts and/or other disinfectant pipe route Ls is reacted with the reducing substance An*, the reaction product increases and the disinfectant increases. The amount of the residue Re is reduced, and in some cases, the flowability of the remaining germicide residue Re becomes high. At least a part of the reduced or fluidized bactericide residue Re is injected together with the reaction product from the residue injection port Id into the seawater Wo flowing through the inboard circulation piping route Lc, and removed. To do. When the germicide residue Re becomes a source of chlorine-containing gas, the generation of chlorine-containing gas is suppressed or prevented by reducing the free available chlorine in the germicide residue Re.

The bactericide residue Re may be removed by a combination of the use of the reducing and removing effect described above using the reducing substance An* and the use of the washing and removing effect of (B) above. For example, when the reducing substance An* is an aqueous solution, if the aqueous solution of the reducing substance An* is urged by the pump Ps to flow through the residue piping path Ls*, the disinfectant remains due to the use of both effects. The substance Re can be removed. In addition, after injecting the reducing substance An* into the residue piping path Ls*, while continuously injecting the water ws that does not contain the reducing substance An* into the tank Ts, the pump Ps discharges the water ws from the tank Ts. If the residue piping path Ls* is forced to flow, it is possible to perform the removal by the washing removal effect after the removal by the reduction removal effect.
(D) Reducing substance An*
The reducing substance An* may be the same substance as the reducing agent An described later or a different substance. Further, the reducing agent An taken out from the tank Tn included in the reducing agent supply device N may be used as it is or after being diluted as necessary, as the reducing substance An* (see FIGS. 20 and 21).
(E) Countermeasures against heat generation during reduction removal If there is a possibility that the environment inside the ship will deteriorate due to the heat generated by the reaction between the free available chlorine in the germicide residue Re and the reducing substance, the following (e1) to (e3) ), the actual damage to the environment inside the ship due to the heat generation is suppressed or prevented.
(E1) The heat generation amount of the reducing substance is suppressed by reducing the concentration of the reducing substance in the water ws.

For example, (e11) the amount of water ws injected into the tank Ts is made larger than that in the case of producing the chlorine-based bactericide As, and the concentration of the reducing substance injected into the water ws is kept low; (e12) reducing substance The aqueous solution of the reducing substance is prepared in advance, and this is poured into the tank Ts so that the concentration of the reducing substance in the water ws is naturally lowered; (e13) The aqueous solution of the reducing substance is prepared in advance. , By subdividing this into water ws multiple times, water ws with a high concentration of reducing substances and water ws that does not contain reducing substances are alternately passed through the residue piping route Ls*, and the reduction is performed. Measures are taken to suppress the heat generated by the reaction between the active substance and the free available chlorine in the germicide residue Re with water ws that does not contain the reducing substance.
(E2) After injecting the reducing substance An* into the residual piping route Ls*, water ws containing no reducing substance An* is injected into the residual piping route Ls* and cooled. For example, after injecting the reducing substance An* into the residue piping path Ls*, water ws that does not contain the reducing substance An* is infused into the tank Ts, and the contents of the contents in the tank Ts are transferred from the tank Ts to the tank Ts by the pump Ps. At least a part of the water is discharged and circulated in the residue piping path Ls*, so that the heat generation is suppressed by the cooling action of the water ws.
(E3) A reaction tank Tsm, which is separate from the tank Ts, is installed in the residue piping route Ls*, and heat is mainly generated in the reaction tank Tsm due to the reaction between the free available chlorine in the germicide residue Re and the reducing substance. Configure to happen.

FIG. 9 is an explanatory view of another modified example of the germicide supply device S shown in FIG. The countermeasure (e3) is illustrated with reference to FIG. In this modification, the disinfectant pipe line Ls is a pipe line of Ts→Qsa→Vs2→Qsb→Ps→Fs→Qs→Vs→Is, and the residual pipe line Ls* is Ts→Qsa→Vs2→Qsb. →Ps→Fs→Qs→Vd→Qsc→Vs4→Id piping paths, which are basically the same as the disinfectant piping path Ls and the residue piping path Ls* in FIG. This modification is further a residuals piping path Ldr that passes through the reaction tank Tsm, and a piping path of Ts → Qsa → Vs1 → Tsm → Vs3 → Qsb → Ps → Fs → Qs → Vd → Qsc → Vs4 → Id. The residue piping path Ldr provided may be a residue piping path Ldr* including a return path (Qsc→Vs5→Tsm) branched from the position Qsc and returning to the reaction tank Tsm.

Here, the position Qsa is a branch point of the piping route from the tank Ts to the pump Ps without going through the reaction tank Tsm and the piping route from the tank Ts to the reaction tank Tsm, and the position Qsb is a position downstream of the position Qsa. It is a connection point, upstream of the pump Ps, between a piping path from the position Qsa to the pump Ps without passing through the reaction tank Tsm and a piping path from the reaction tank Tsm to the pump Ps. The valve Vs1 is an opening/closing valve downstream of the position Qsa and upstream of the reaction tank Tsm, the valve Vs2 is an opening/closing valve downstream of the position Qsa and upstream of the position Qsb, and the valve Vs3 is downstream of the reaction tank Tsm. , An open/close valve upstream of position Qsb.

The position Qsc is a position downstream of the valve Vd and upstream of the residue injection port Id. The valve Vs4 is an opening/closing valve downstream of the position Qsc and upstream of the residue injection port Id, and the valve Vs5 is downstream of the position Qsc and is a return path (Qsc) of the residue piping path Ldr* branched from the position Qsc. (→Vs5→Tsm) is an on-off valve.

The disinfectant pipe line Ls is set by opening valves Vs2 and Vs and closing valves Vs1, Vs3 and Vd, and the residue pipe line Ls* is opened by valves Vs2, Vd and Vs4 and valve Vs1. , Vs3, Vs and Vs5 are set by closing. The residual piping line Ldr is set by opening the valves Vs1, Vs3, Vd and Vs4 and closing the valves Vs2, Vs and Vs5, and the residual piping line Ldr* is set by the valves Vs1, Vs3, Vd and Vs5. Set by opening and closing valves Vs2, Vs and Vs4.

The switching of the disinfectant pipe line Ls, the residue pipe line Ls*, the residue pipe line Ldr, and the residue pipe line Ldr* is performed unless the control device PLC or a part of the switching operation is manually performed. , Is automatically performed according to a control program installed in advance in another control device (not shown).

For example, at least a part of the germicide residue Re is circulated along with the water ws along the residue piping path Ldr*, and after the circulation is performed a predetermined number of times or a predetermined time, the residue piping path Ldr is switched to From the inlet Id, automatic control is performed so as to inject the seawater Wo taken from the outside of the ship that circulates in the inboard circulation piping path Lc. In addition, at least a part of the bactericide residue Re is first circulated along the water ws along the residue piping path Ls* and injected into the seawater Wo taken from the outside through the residue injection port Id. By switching from the piping route Ls* to the residue piping route Ldr*, and then by circulating water ws, at least a part of the sterilizing agent residue Re that has not been completely removed is circulated along the residue piping route Ldr*. After the circulation is performed a predetermined number of times or a predetermined time, the residue piping path Ldr is switched to, and automatic control is performed so as to inject the seawater Wo taken from the outside through the residue injection port Id. Which automatic control is performed or what other automatic control is performed depends on the content of the control program.

When the residue piping paths Ldr, Ldr* are set, the contents of the tank Ts are moved from the tank Ts to the reaction tank Tsm by a pump (not shown) downstream of the position Qsa and upstream of the reaction tank Tsm. Or by the action of gravity. When the valve Vs3 is open, the movement may be performed by the negative pressure generated by the force of the pump Ps.

The reaction tank Tsm has a structure (for example, a deep structure) in which the bactericide residue Re stays at least temporarily or for a short time together with the water ws containing the reducing substance An*. Therefore, heat generation due to the reaction between the free available chlorine in the germicide residue Re and the reducing substance An* easily proceeds in the reaction tank Tsm. Moreover, at least a part of the contents of the tank Ts is discharged by the pump Ps, further at least a part of the contents of the reaction tank Tsm is discharged, and the reaction tank Tsm is urged to flow through the residue piping path Ldr. From the residue injection port Id together with at least a part of the bactericide residue Re that remains downstream than, the seawater Wo flowing in the inboard circulation piping route Lc is injected and removed, so that the place where the heat generation occurs, Mainly the reaction tank Tsm. Therefore, the countermeasure against heat generation may be taken mainly for the reaction tank Tsm.

After injecting the reducing substance An* into the residual piping line Ls*, the water ws containing no reducing substance An* is continuously injected into the tank Ts, and the water ws is discharged from the tank Ts by the pump Ps. If it is allowed to flow through the residue piping path Ls* with force, the heat generation of the reducing substance An* can be suppressed by the cooling action of the water ws as described in (e2) above. The bactericide residue Re can be removed by utilizing the removal effect, and the heat generation can also be suppressed by this, which is more preferable.

When it is necessary to accelerate the reaction between the free available chlorine in the bactericide residue Re and the reducing substance An*, or even if the reaction is promoted, it does not interfere with heat generation measures and can suppress the adverse effects of heat generation. In some cases, the tank Tsm may be equipped with a stirrer (not shown) for stirring the contents.
(F) Removal from Return Piping Path Lsr When the disinfectant piping path Ls includes the return piping path Lsr, in order to remove at least a part of the disinfectant residue Re remaining in the return piping path Lsr, (f1 ) First, temporarily close the valve Vs and the valve Vd to return the water ws from the position Qs0 to the position Qs1, or circulate between the position Qs0 and the position Qs1, and the sterilizing agent remaining in the return piping path Lsr. The fluidity of the residue Re is improved by the momentum of the water ws and/or through the mixing or dissolution of the germicide residue Re with the water ws. After that, the valve Vs is closed and the valve Vd is opened, and at least a part of the germicide residue Re may be injected from the residue injection port Id into the seawater Wo taken from the outside of the ship. (F2) First, temporarily close the valves Vs and Vd to return the water ws containing the reducing substance An* from the position Qs0 to the position Qs1, or between the positions Qs0 and Qs1. It is circulated, and in the process, by reacting the free available chlorine in the germicide residue Re with the reducing substance An*, or/and by the force of water ws and/or the germicide residue Re. Through mixing with water ws or dissolving in water ws, the fluidity of the germicide residue Re remaining in the return piping path Lsr is improved. Thereafter, the valve Vs is closed and the valve Vd is opened, and the reaction product may be injected into the seawater Wo taken from the outside through the residue injection port Id together with at least a part of the germicide residue Re. ..
3.6) Combined use of the disinfectant inlet and the residue inlet As shown in FIGS. 1 to 9, if the disinfectant inlet Is and the residue inlet Id are separated, the disinfectant piping path Ls In some cases, the structure between the position Qs and the bactericide injection port Is becomes complicated, and the bactericide residue Re remaining in that part cannot be sufficiently removed. Further, in the case where a residue injection pump Pid (not shown) is provided downstream of the valve Vd of the residue piping path Ls* and upstream of the residue injection port Id, of course, further downstream of the residue injection pump Pid (discharging). If a back pressure valve is provided on the outlet side) and upstream of the residue inlet Id, the structure of the residue piping path Ls* becomes complicated. On the other hand, if the disinfectant inlet Is is also used as the residue inlet Id (sterilizer inlet/residue inlet Is/Id), the disinfectant piping path Ls is also a simple residue piping path Ls*. (Ts→Ps→Fs→Vs→Is/Id), the valve Vd is useless, and the internal structure of the disinfectant supply device S is generally simplified, so that the above problems can be suppressed or prevented. You can

For example, in the disinfectant supply device S shown in FIG. 10, by opening the valve Vs, the chlorine-based disinfectant As is supplied from the disinfectant injection port/residue injection port Is/Id by the pump Ps. Since it can be injected into the seawater Wo taken from the outside of the ship that flows through the ballast water intake pipe line Lf, it is as good as the disinfectant supply device S shown in FIG. Rather, the internal structure can be made simpler, and the disinfectant residue remaining between the position Qs and the disinfectant inlet Is when the disinfectant inlet Is and the residue inlet Id are separated. At least a part of a larger amount of the bactericide residue Re including at least a part of the product Re can be injected into the seawater Wo taken from the outside of the ship that flows through the inboard circulation piping route Lc, and therefore, in FIG. 2 is preferable to the disinfectant supply device S shown in FIG.

The disinfectant injection port/residue injection port Is/Id can also be adopted in the disinfectant supply device S shown in FIG. 9 as shown in FIG. The sterilizing agent supply device S shown in FIG. 11 has the sterilizing agent shown in FIG. 9 except for the adoption of the sterilizing agent injection port/residue injection port Is/Id and the modifications required by the adoption. It is the same as the agent supply device. Specifically, by adopting the disinfectant injection port/residue injection port Is/Id, the valve Vd and the valve Vs4 become useless, and the position Qs and the position Qsc can be identified, and the disinfectant piping path Ls can be identified. Also serves as the residual piping line Ls* (Ts→Qsa→Vs2→Qsb→Ps→Fs→Qs→Vs→Is/Id), and the residual piping route Ldr is Ts→Qsa→Vs1→Tsm→Vs3→Qsb→ Ps → Fs → Qs → Vs → Is/id piping path, and residue piping path Ldr* is accompanied by a circulation path (Qs → Vs5 → Tsm) that branches from position Qs and returns to tank Tsm. It is the same as the disinfectant supply device shown in FIG. 9 except that it corresponds to *.
4) Reductant supply device N
4.1) Basic configuration As shown in FIG. 1, the reducing agent supply device N is filled with a reducing agent material mn and water wn serving as a solvent thereof, a tank Tn for storing both, and a reducing agent injection tank. An inlet In and a reducing agent piping path Ln connecting the tank Tn and the reducing agent inlet In are provided. The reducing agent inlet In is an inlet for injecting the reducing agent An into the ballast water Wt taken from the ballast tank T flowing through the ballast water drainage piping Lr. The reducing agent piping path Ln includes a pump Pn downstream of the tank Tn and upstream of the reducing agent inlet In, and a valve Vn downstream of the pump Pn and upstream of the reducing agent inlet In, Tn→Pn→Fn→Vn→ This is the In piping path.

The switching of the opening and closing of the valve Vn is automatically performed according to a control program pre-installed in the control device PLC or other control device (not shown) unless some or all of the switching operation is manually performed. Be seen.

Although the reducing agent supply device N includes the flow meter Fn in the reducing agent piping route Ln, it may include a TRO measuring device and other devices/devices not shown in the reducing agent piping route Ln. Further, the reducing agent supply device N is provided with a check valve Vcn (not shown) on the discharge side of the pump Pn and on the upstream side of the valve Vn for preventing a backflow that may occur in the event of an abnormality such as a stop or failure of the pump Pn. Alternatively, a check valve other than the check valve Vcn, which is not shown, or a manual valve for the convenience of maintenance and inspection may be provided in the reducing agent piping path Ln.
4.2) Reducing agent A typical example of the raw material mn of the reducing agent An is sodium sulfite or a hydrate thereof, sodium thiosulfate or a hydrate thereof, or an aqueous solution thereof.

When the raw material mn is solid and the solubility of the raw material mn in water is low, the water temperature of the water wn or the temperature of the mixture Cn formed by mixing the raw material mn with the water wn can be increased by using an appropriate heating device, or By strongly stirring the mixture Cn using a different stirring device, a necessary amount of the aqueous solution An having the concentration of the reducing substance required as the reducing agent is prepared.

If the raw material mn is a solid and the solubility of the raw material mn in water is high, and if the raw material mn and water wn are contained in the tank Tn and lightly agitated to secure the required amount of the reducing agent An in the tank Tn, the pump Vigorous stirring of the mixture Cn with Pn is not essential for the preparation of the reducing agent An. Further, when the aqueous solution of the raw material mn (reducing agent An) can be prepared in advance, it is not necessary to inject the raw material mn and water wn into the tank Tn, and strong stirring of the mixture Cn by the pump Pn is not an indecision. It is only necessary to inject the aqueous solution into the tank Tn.
4.3) Reduction treatment When the ballast water drainage piping line Lr is set and the valve Vn is open, the pump Pn is used to reduce the aqueous solution (reducing agent) An of the raw material mn through the reducing agent piping path Ln. From the inlet In, inject ballast water Wt taken from the ballast tank T flowing through the ballast water drainage piping Lr, remaining in the ballast water Wt, reduce the free effective chlorine derived from the chlorine-based bactericide, Detoxify to a level where outboard drainage is allowed.

When the ballast water drainage piping Lr is not set (for example, when the ballast water intake piping Lf or the residue discharge piping Ld is set), the valve Vn is normally closed and the pump Pn is stopped. However, in the second operation mode of the ballast pump Pm described later, in the case of the C type shown in FIG. 6 and the D type shown in FIG. Since the reducing agent An is injected into the circulating seawater (at least a part of the disinfectant residue Re is seawater Wo* already injected from the residue injection port Id), the valve Vn is opened and the pump Pn is operated.
4.4) Preparation of reducing substance An* When the reducing substance An* used for reducing and removing the bactericide residue Re is prepared from the reducing agent An, it is shown in FIGS. 20 and 21. As shown in the configuration example, the pump Pn discharges at least a part of the content Cn of the tank Tn from the tank Tn, and then the reducing agent piping path is provided at the position Qn* downstream of the pump and upstream of the reducing agent inlet In. The reducing agent An is taken out through a branch piping path Lns that branches from Ln, and the taken reducing agent An is used as it is or diluted with water as the reducing substance An*.
5) Ballast Water Treatment Method FIG. 12 is a process flow explanatory diagram of the ballast water treatment method executed in the ship according to the present invention.
5.1) Ballast water treatment method WTM
The ballast water treatment method WTM executed in the ship VSL has three stages, that is, a first stage ST1, a second stage ST2 and a third stage ST3, as shown in FIG. The first stage ST1 is executed in the first operation mode of the ballast pump Pm, the second stage ST2 is executed in its second operation mode (A type and B type), and the first stage ST2 is executed in its third operation mode. Three-step ST3 is executed.

The first stage ST1 is a step ss1 of preparing a chlorine-based sterilizer As in the sterilizer supply device S, a step ss2 of circulating seawater Wo taken from outside the ship through a ballast water intake pipe line Lf inside the ship, and ballast water intake Process ss3 for injecting the prepared chlorine-based disinfectant As from the disinfectant injection port Is to the seawater Wo taken from the outside of the distribution pipe line Lf to perform sterilization and chlorine-based disinfectant There is a step ss4 of storing or refilling the ballast tank T with the seawater Ws into which As is injected.

The second step ST2 is a step sd1 of circulating the seawater Wo taken from the outside along the inboard circulation piping route Lc on the ship, and sterilizing the seawater Wo circulating in the inboard circulation piping route Lc. At least a part of the disinfectant residue Re remaining in the agent supply device S is injected and removed from the residue injection port Id or the disinfectant injection port/residue injection port Is/Id through the residue piping path Ls*. The process sd2 and the process sd3 for discharging the seawater Wd into which at least a part of the bactericide residue Re is drained outboard.

The third step ST3 is a step sn1 of preparing a reducing agent An in the reducing agent supply apparatus N, a step sn2 of circulating ballast water Wt taken from the ballast tank T through a ballast water drainage piping route Lr in the ship, and a ballast water drainage. A process sn3 for injecting the prepared reducing agent As from the reducing agent injection port In to the ballast water Wt circulating in the piping line Lr for the reduction treatment and the ballast water in which the reducing agent An is injected. It has a process sn4 for draining Wn out of the ship.

In the second stage ST2, at least a part of the disinfectant residue Re is taken from the outboard by utilizing the force of the pump Ps, gravity and/or the negative pressure generated by the circulation of the seawater Wo taken from the outboard. Move to seawater Wo side and inject it into seawater Wo. At that time, by increasing the amount of water ws injected into the tank Ts, and by circulating more water wo, which has been urged by the pump Ps, into the disinfectant piping path Is, the flowability of the disinfectant residue Re is increased, and May accelerate the injection of the bactericide residue Re into the seawater Wo taken from outside the ship.

Further, the reducing substance An* is continuously, discontinuously, periodically or repeatedly or temporarily circulated in the residue piping path Ls* (for example, the reducing substance An* is mixed with water ws). Then, the water ws containing the reducing substance An* is continuously, discontinuously, cyclically or repeatedly or temporarily circulated through the residual substance piping path Ls*) to obtain a bactericidal agent. At least a portion of the free available chlorine remaining in the residue Re was reacted with the reducing substance An*, and at least a portion of the remaining bactericide residue Re was taken outboard along with the reaction product. It may be injected into the seawater Wo, and in that case, the injection amount of the water ws into the tank Ts may be increased, and more water ws which is urged by the pump Ps may be circulated in the disinfectant piping path Is.

The third step ST3 is not an indispensable step for removing the bactericide residue Re performed in the second step ST2, but the step ss3 of the first step ST1 (sterilization treatment with the chlorine-based bactericide As is performed). ) Is usually essential for ballast water treatment methods involving WTM.
5.2) Variant of WTM for ballast water treatment method
When at least a part of the disinfectant residue Re is injected into the seawater Wo taken from the outside in the second stage ST2, the disinfectant residue Re in the seawater Wo is changed into the seawater Wo during the period from the start to the end of the injection. The concentration of free available chlorine derived from it may be excessively high, and the seawater Wo may have a water quality that is not suitable for draining to the outside of the ship. If there is a possibility of this, the seawater Wo (hereinafter sometimes referred to as “Wo*”) into which at least a part of the germicide residue Re is injected during the period is regarded as ballast water Wt and the third stage Perform ST3 to reduce the free available chlorine derived from the bactericide residue Re in the seawater Wo* and reduce the reducing agent As sufficient to detoxify the seawater Wo* to the level where outboard drainage is allowed. Inject from inlet In. Such a stage of ballast water treatment is tentatively called a second* stage ST2*, which has a first stage ST1, a second* stage ST2* and a third stage ST3, and the first stage of the ballast pump Pm. The first stage ST1 is executed in the operation mode, the second* stage ST2* is executed in the second operation mode (C type and D type), and the third stage ST3 is executed in the third operation mode. A modification of the ballast water treatment method WTM as shown in FIG. 12 to be carried out can be considered.

The second step ST2* is a step sd1 in which the seawater Wo taken from the outside of the ship is circulated along the inboard circulation piping route Lc, and the seawater Wo flowing in the inboard circulation piping route Lc is sterilized. At least a part of the disinfectant residue Re remaining in the agent supply device S is injected and removed from the residue injection port Id or the disinfectant injection port/residue injection port Is/Id through the residue piping path Ls*. Step sd2, step sn1 of preparing the reducing agent An in the reducing agent supply device N, seawater Wo (that is, seawater Wo*) into which at least a part of the disinfectant residue Re has been injected, the piping route Lc for inboard circulation in the ship Sn2* flowing along the seawater, and a step of injecting the prepared reducing agent As from the reducing agent injection port In into the seawater Wo* circulating in the inboard circulation piping route Lc to perform a reduction treatment There is a step sn4* of circulating the seawater Wo* in which sn3* and the reducing agent An are injected onboard the ship.
5.3) Example of implementation of ballast water treatment method For example, when a cargo ship leaves the first port with an empty cargo, seawater is loaded into the ballast tank at the first port and at the second port where cargo is loaded. When seawater is discharged out of the ballast tank, the first stage ST1 is performed in the first port and the third stage ST3 is performed in the second port. The second stage and the second* stage are both carried out before sailing from the first port or after sailing from the first port and before arriving at the second port.

In addition, even if the second stage and the second stage are carried out at the stage of arriving at the second port, it is possible to suppress the progress of the generation/accumulation/solidification of the precipitate of the component of the chlorine-based chemical ms, and The steps may be performed at the step of arriving at the second port or after that, as long as it is possible to suppress or prevent the occurrence of the operation failure due to the germicide residue Re.
6) Ballast Pump Pm Operation Mode 6.1) First Operation Mode Table 2 shows the settings for opening and closing the valves in the first operation mode of the ballast pump Pm.

In this first operation mode, the first stage ST1 is executed in the piping path drawn in bold in FIG. Specifically, seawater Wo outside the vessel VSL is taken into the vessel VSL from the water intake IT by the ballast pump Pm, and is circulated toward the ballast tank T through the ballast water intake piping route Lf, and the intermediate filter device is used. After filtering with F, chlorine-based bactericidal agent As is injected from the bactericidal agent inlet Is, stirred by mixer Mxs, and then stored or filled in ballast tank T as chlorine-based bactericidal agent As-injected seawater Ws.

The disinfectant supply device S is a pump Ps, along the disinfectant piping path Ls, discharges a mixture Cs formed by mixing the chlorine-based chemical ms with water ws from the tank Ts, and stirs the mixture Cs to cause chlorine-based mixing. A bactericide aqueous solution (chlorine bactericide) As is created, and the chlorine bactericide As is injected from the bactericidal agent injection port Is into the seawater Wo that is taken from outside the vessel that flows through the ballast water intake pipe line Lf.

When the chlorine agent ms may become a source of chlorine-containing gas due to contact with seawater (for example, the chlorine agent ms is trichloroisocyanuric acid or sodium dichloroisocyanurate and its hydrate, potassium dichloroisocyanurate, etc. For chlorinated isocyanuric acid compounds), use water ws as fresh water. The fresh water is preferably fresh water produced using a seawater desalination apparatus installed on the ship.
6.2) Second Operation Mode There are four types of second operation modes of the ballast pump Pm: A type, B type, C type and D type. The settings for opening and closing the valve in each type are as shown in Table 2.

In the A type and the B type, the second step ST2 is executed, and therefore, the reducing agent An from the reducing agent supply device N is injected into the seawater flowing in the inboard circulation piping route Lc (step sn3*). Is not done. In the C type and the D type, the second* stage ST2* is executed, and therefore, the reducing agent An from the reducing agent supply device N is injected into the seawater flowing in the inboard circulation piping path Lc (step sn3 *) is performed. The inboard circulation piping route Lc is the inboard circulation piping route <Lc1> for A type and C type, and is the inboard circulation piping route <Lc2> for B type and D type.
(A) Type A In type A of the second operation mode, the second stage ST2 is executed in the piping path drawn in bold in FIG. Specifically, the seawater Wo outside the vessel VSL is taken into the vessel VSL from the water intake IT by the ballast pump Pm, and is circulated toward the outlet DO through the onboard circulation piping route <Lc1>, and the intermediate filter is used. It does not pass through the device F, and then at least a part of the germicide residue Re is injected from the residue injection port Id. Subsequently, the seawater Wo into which the bactericide residue Re has been injected (that is, seawater Wo*) is stirred by the mixers Mxs and Mxn, and then the seawater Wd into which the bactericide residue Re after injection has been injected is provided as a pipe route for inboard circulation <Lc1> is circulated.
(B) Type B In the type B of the second operation mode, the second stage ST2 is executed in the piping path drawn in bold in FIG. Specifically, the seawater Wo outside the vessel VSL is taken into the vessel VSL from the intake IT by the ballast pump Pm, and is circulated toward the outlet DO through the onboard circulation piping path <Lc2>, and the intermediate filter is used. After passing through the device F, at least a part of the disinfectant residue Re is injected from the residue injection port Id. Subsequently, the seawater Wo into which the bactericide residue Re has been injected (that is, seawater Wo*) is stirred by the mixers Mxs and Mxn, and then the seawater Wd into which the bactericide residue Re after injection has been injected is provided as a pipe route for inboard circulation <Lc1> is circulated.
(C) C-type In the C-type of the second operation mode, the second ST* stage is executed in the piping path drawn in bold in FIG. Specifically, the seawater Wo outside the vessel VSL is taken into the vessel VSL from the water intake IT by the ballast pump Pm, and is circulated toward the outlet DO through the onboard circulation piping route <Lc1>, and the intermediate filter is used. It does not pass through the device F, and then at least a part of the disinfectant residue Re is injected from the residue injection port Id into the seawater Wo taken from outside the ship. Subsequently, the seawater Wo (that is, seawater Wo*) into which the bactericide residue Re has been injected is agitated by the mixer Mxs, the reducing agent An is injected from the reducing agent injection port In, and the reducing agent An injected seawater Wo* is mixed. After stirring with Mxn, the in-circulation piping path <Lc1> is circulated as seawater Wd into which the sterilizing agent residue Re after stirring has been injected.
(D) D type In the D type of the second operation mode, the second* stage ST2* is executed in the piping path drawn in bold in FIG. Specifically, the seawater Wo outside the vessel VSL is taken into the vessel VSL from the water intake IT by the ballast pump Pm, and is circulated toward the outlet DO through the onboard circulation piping route <Lc2>, and the intermediate filter is used. After passing through the device F, at least part of the disinfectant residue Re is injected from the residue injection port Id into the seawater Wo taken from outside the ship. Subsequently, the seawater Wo (that is, seawater Wo*) into which the germicide residue Re has been injected is agitated by the mixer Mxs, the reducing agent An is injected from the reducing agent injection port In, and the seawater Wo* into which the reducing agent An has been injected is mixed. After stirring with Mxn, the inboard circulation piping path <Lc1> is circulated as seawater Wd in which the stirred germicide residue Re has been injected.

Whether the second operation mode is A type or D type:
<1> The disinfectant supply device S causes at least a part of the disinfectant residue Re remaining in the tank Ts or the disinfectant pipe line Ls to flow along the residue pipe line Ls* by the pump Ps, and the residue From the inlet Id, it is injected into the seawater Wo taken from the outside of the ship that circulates through the inboard circulation piping route Lc. In this case, the chlorine-based chemical ms is not injected into the tank Ts. However, the water ws may be continuously, discontinuously, periodically or repeatedly, or temporarily injected into the tank Ts to be circulated in the residue piping path Ls*. Further, as in the case of the disinfectant manufacturing apparatus S shown in FIG. 8, the reducing substance An* is continuously, discontinuously, periodically or repeatedly or temporarily added to the residual substance piping path. At least a part of the free available chlorine remaining in the bactericide residue Re may be reacted with the reducing substance An* by circulating it in Ls*, and at that time, water ws in the tank Ts It is also possible to increase the injection amount of the water and supply more water ws, which has been urged by the pump Ps, into the sterilizer piping path Is.
<2> If the reducing substance An* is to be circulated in the residue piping path Ls*, as in the case of the disinfectant manufacturing apparatus S shown in FIG. 9, downstream of the tank Ts, residue piping By providing a reaction tank Tsm in the middle of the route Ldr, the reaction between the free available chlorine in the bactericide residue Re and the reducing substance An* is caused mainly in the reaction tank Tsm, and then at least one of the contents of the tank Tsm is Part is circulated in the residue piping path Ldr, and from the residue injection port Id along with the bactericide residue Re remaining downstream of the reaction tank Tsm, the seawater Wo taken from the outside of the ship that circulates the inboard circulation piping path Lc. It may be configured to be injected into.
<3> When the bactericide residue Re may be a source of chlorine-containing gas due to contact with seawater (for example, the chlorine-based drug ms is trichloroisocyanuric acid, dichloroisocyanuric acid, sodium dichloroisocyanurate and its hydration). Substance, and chlorinated isocyanuric acid such as potassium dichloroisocyanurate), use water ws as clear water. The fresh water is preferably fresh water produced using a seawater desalination apparatus installed on the ship.
<4> The reducing substance An* may be the same substance as the reducing agent An or may be a different substance. The reducing agent An taken out from the tank Tn may be used as it is or after being diluted as necessary, as the reducing substance An*.
<5> The circulation of seawater Wd in the inboard circulation piping route Lc (the inboard circulation piping route <Lc1> and the inboard circulation piping route <Lc2>) is temporary even if it lasts for a long time. May be. On the day when the bactericide residue Re is injected into the seawater Wo, the circulation of the seawater Wd may be stopped so that the bactericidal residue Re can be stored in the inboard circulation piping path <Lc1>. The seawater Wd, after being sufficiently detoxified, is either stored in the ballast tank T or discharged from the exit DO to the outside of the ship VSL.
6.3) Third operation mode The settings for opening and closing the valve in the third operation mode of the ballast pump Pm are as shown in Table 2.

In this third operation mode, the third stage ST3 is executed in the piping path drawn in bold in FIG. Specifically, the chlorine-based bactericidal agent As-injected seawater Ws contained in the ballast tank T is taken as ballast water Wt from the ballast tank T, and the ballast water Wt taken from the ballast tank T is used as a ballast pump. By Pm, it flows through the ballast water drainage piping route Lr toward the drainage port DO, and from the intermediate reducing agent injection port In, a reducing agent for reducing the available free chlorine derived from the chlorine-based germicide As to render it harmless. After injecting An and stirring by the mixer Mxn, the ballast water Wn already injected with the reducing agent An is drained from the outlet DO to the outside of the vessel VSL.

The reducing agent supply device N causes the pump Pn to discharge the mixture Cn formed by mixing the raw material mn of the reducing agent with the water wn from the tank Tn along the reducing agent piping path Ln and reduce the mixture Cn by stirring the mixture Cn. The agent An is produced, and the reducing agent An is injected from the reducing agent inlet In into the ballast water Wt taken from the ballast tank T flowing through the ballast water drainage piping Lr.

When the reducing agent As in an aqueous solution state can be prepared and the reducing agent As can be pre-injected into the tank Tn, the reducing agent supply device N uses the pump Pn to reduce the reducing agent piping path. The reducing agent As is discharged from the tank Tn along Ln, and is injected from the reducing agent injection port In into the ballast water Wt flowing in the ballast water drainage piping route Lr.
6.4) Time difference between the end of the first operation mode and the start of the second operation mode The second operation mode is started as early as possible after the end of the first operation mode. The shorter the interval between the end of the first operation mode and the start of the second operation mode, the more effectively suppresses the generation/accumulation/solidification of precipitates of the components of the chlorine-based chemical ms, and sterilizes them. This is because it is possible to suppress or prevent the occurrence of operation failure due to the agent residue Re. Therefore, the second operation mode is started within 3 hours, preferably within 2 hours, more preferably within 1 hour after the end of the first operation mode, and preferably immediately after the end of the first operation mode. However, the time difference between the end of the first operation mode and the start of the second operation mode may exceed 3 hours as long as it has the effect of suppressing or preventing the occurrence of the operation failure caused by the germicide residue Re. ..
<Second Embodiment of Ship According to the Present Invention>
1) Basic Configuration and Piping Route FIG. 13 is an explanatory diagram of the basic configuration of the second embodiment of the ship according to the present invention. For convenience of explanation, in FIG. 13, all the open/close valves are drawn in an open state.

The disinfectant supply device S in the second embodiment of the ship according to the present invention is the disinfectant in the first embodiment shown in FIG. 1 as shown in FIG. 13 and as described later. The internal structure is simpler than that of the supply device, and the disinfectant residue Re can be effectively removed.

However, when the disinfectant supply device S is regarded as a device block having a function of injecting at least a part of the chlorine-based disinfectant As and the disinfectant residue Re into the ballast water, the first embodiment and the second embodiment There is no fundamental difference with the form. Also in the second embodiment, the opening/closing settings of the opening/closing valves respectively corresponding to the ballast water intake piping path Lf, the ballast water drainage piping path Lr, and the inboard circulation piping path Lc are as shown in Table 1. is there.

Therefore, the description of the basic configuration of the second embodiment is the same as the description of the basic configuration of the first embodiment, except for the internal configuration of the disinfectant supply device S and the parts related to the operation.
2) Sterilizer supply device S
In the disinfectant supply device S according to the second embodiment, as shown in FIG. 13, the disinfectant injection port Is also serves as the residue injection port Id (the disinfectant injection port and the residue injection port Is. /Id), and accordingly, the disinfectant piping path Ls also serves as the residue piping path Ls* (Ts→Ps→Fs→Vs→Is/Id), and the disinfectant piping path Ls and the residue piping path Ls* Since the valve Vd for switching the sterilization agent is not required, the internal structure becomes simpler and the sterilizing agent residue Re can be removed more effectively as compared with the sterilizing agent supply device according to the first embodiment. (See 3.6 above). From this, it can be said that the second embodiment is preferable to the first embodiment.

When the injection pressure of chlorine-based bactericidal agent As into the seawater Wo taken from the outboard from the bactericidal agent inlet/residue inlet Is/Id is insufficient, the bactericidal agent piping route Ls is located downstream of the valve Vs and sterilized. A disinfectant injection pump Pis (not shown) may be provided upstream of the agent injection/residue injection port Is/Id, and when the disinfectant injection pump Pis (not shown) is provided, sterilization is performed. A back pressure valve may be provided on the downstream side (discharging port side) of the agent injection pump Pis and on the upstream side of the germicide injection port/residue injection port Is/Id.

The sterilant injection pump Pis is switched to be in an operating state when the valve Vs is open and to be inactive when the valve Vs is closed. Such switching of the operating state of the pump Pis is automatically performed according to a control program pre-installed in the control device PLC or other control device (not shown) unless a part or all of the switching operation is manually performed. Done in.

Further, the sterilizing agent piping path Ls may include the above-mentioned return piping path Lsr (not shown). Then, by closing the valve Vs, the entire contents Cs may be configured to be returned to the upstream of the pump Ps through the return piping path Lsr, and by adjusting the opening of the valve Vs, the return piping The amount of the contents Cs returning to the upstream of the pump Ps via the path Lsr may be determined. When removing the disinfectant residue Re from the disinfectant piping route Ls, at least a part of the return piping route Lsr, which is a part of the disinfectant piping route Ls, constitutes a part of the residue piping route Ls*. ..

Although there are differences in the internal structure as described above, the functions and roles of the disinfectant supply device S in the second embodiment are the same as those of the disinfectant supply device in the first embodiment. The description of the disinfectant supply device S in the second embodiment is basically the same as the description (excluding the above 3.6) in 3) of the disinfectant supply device in the first embodiment.
3) Removal of bactericide residue Re and its modification The injection port for injecting at least a part of the bactericide residue Re into the seawater Wo taken from the outside is the bactericide injection port/residue injection port Is/Id. Except for the points, the principle, action, and mechanism of removing the disinfectant residue shown in FIGS. 16 to 19 are the same as those in the first embodiment shown in FIGS. 4 and 7, respectively. Of the removal of the germicide residue shown in FIGS. 10 and 11 is basically the same as those of FIG. 8 and FIG. 9, respectively. This is the same as the modified example of the removal of the disinfectant residue in the first embodiment. Therefore, the description of the removal of the disinfectant residue Re in the first embodiment and its modification (especially the description of 3.5 above) is basically the same as that of the disinfectant residue Re in the second embodiment. The same applies for removal. For example, in the removal of the disinfectant residue Re in the second embodiment, at least a part of the disinfectant residue Re remaining in the disinfectant pipe path Ls including the tank Ts is supplied by the pump Ps and/or the tank. The momentum of the water ws discharged from Ts and/or the disinfectant residue Re is mixed or dissolved in the water ws, and the disinfectant injection port/residue injection port Is/Id is passed through the residue piping path Ls* It is injected into the seawater Wo taken from outside the ship that circulates in the circulation piping path Lc. At that time, at least the disinfectant residue Re remaining in the disinfectant pipe path Ls including the tank Ts is mixed by the momentum of the water ws and/or through the mixing of the disinfectant residue Re with the water ws or the dissolution into the water ws. A part may be injected from the disinfectant injection port/residue injection port Is/Id to the seawater Wo taken from outside the ship that flows through the inboard circulation piping route Lc and may be removed, and the tank Ts and/or other When the free available chlorine in the disinfectant residue Re remaining in the disinfectant pipe route Ls of No. 2 is reacted with the reducing substance An*, the amount of the disinfectant residue Re increases with the increase of reaction products. It decreases, and the fluidity of the remaining germicide residue Re becomes high in some cases. At least a part of the bactericide residue Re which has been reduced or whose fluidity has been increased is supplied from the bactericide injection port/residue injection port Is/Id together with the reaction product through a ship circulating circulation route Lc. It may be removed by injecting it into the seawater Wo taken from the outside.
4) Configuration Example for Retrieving Reducing Substance An* The configuration example for retrieving the reducing substance An* and the description thereof shown in FIGS. 20 and 21 are applicable to the second embodiment as they are.
5) Reductant supply device N
The reducing agent supply device N in the second embodiment is the same as the reducing agent supply device in the first embodiment. The description of the reducing agent supply device N in the second embodiment is basically the same as the above description 4) of the reducing agent supply device in the first embodiment.
6) Operation Mode of Ballast Pump Pm The first operation mode of the ballast pump Pm in the second embodiment shown in FIG. 14 is seawater obtained by taking at least a part of the disinfectant residue Re from the outside. It is the same as the first operation mode of the ballast pump in the first embodiment shown in FIG. 2 except that the inlet for injecting into Wo is the germicide inlet/residue inlet Is/Id. .. Therefore, the description of FIG. 14 is basically the same as the description of FIG.

In the third operation mode of the ballast pump Pm, at least a part of the chlorine-based disinfectant As and the disinfectant residue Re is not injected into the ballast water, and the disinfectant supply device S is not involved. Therefore, the description of FIG. 15 is the same as the description of FIG.

The type A to type D of the second operation mode of the ballast pump Pm in the second embodiment shown in FIGS. 16 to 19 draws at least a part of the disinfectant residue Re from the outboard. Second operation of the ballast pump in the first embodiment shown in FIGS. 4 to 7, except that the injection port for injecting seawater Wo is the germicide injection port/residue injection port Is/Id. This is the same as modes A to D. Therefore, the description of FIGS. 16 to 19 is basically the same as the description of FIGS. 4 to 7.

The valve Vd is not required if the inlet is the germicide inlet/residue inlet Is/Id. Therefore, the setting of the valve opening/closing in each operation mode of the ballast pump Pm is shown in Table 3. It is as follows.

7) Ballast Water Treatment Method For the explanation of the process flow of the ballast water treatment method and its modification shown in FIG. 12 (see 5 above), refer to the sterilizing agent inlet Is and the residue inlet Id. Also, if the word is replaced with the germicide inlet/residue inlet Is/Id, the process flow of the ballast water treatment method and its modification in the second embodiment is also applicable.
8) Example of Configuration for Retrieving Reducing Substance An* from Reducing Agent Supply Device N FIG. 20 shows an example of configuration for extracting a reducing substance from the reducing agent supply device N. In the configuration example shown in this figure, water is taken from the ballast tank T flowing through the branch piping path Lns and the ballast water drainage piping path Lr for preparing the reducing substance An* used for removing the germicide residue Re. One of the reducing agent piping paths Ln for injecting the reducing agent An into the ballast water Wt is selectively selected. Switching between the reducing agent piping path Ln and the branch piping path Lns is performed by switching between opening and closing of the valve Vn and the valve Vn* provided in the branch piping path Lns downstream of the position Qn*.

When selecting the branch piping path Lns, the valve Vn is closed and the valve Vn* is opened. This corresponds to the case where the ballast pump Pm is the A type or the B type in the second operation mode or the case where the second stage ST2 of the ballast water treatment method is executed.

When selecting the branch pipe path Ln, the valve Vn is opened and the valve Vn* is closed. This corresponds to the case where the ballast pump Pm is the C type or D type in the second operation mode, or the case where the third stage ST3 of the ballast water treatment method is executed.

21 shows another configuration example different from the configuration example shown in FIG. In the configuration example shown in FIG. 21, the reducing agent An is injected into the seawater Wo* in which the disinfectant residue is injected, and at the same time, the reducing substance An* is prepared. Both simultaneous selections of path Lns are made. When the simultaneous selection is performed, for example, the valves Vn and Vn* are both incompletely opened, or the valve Vn* is opened and the valve Vn is incompletely opened (half-opened). This corresponds to the case where the ballast pump Pm is the C type or the D type in the second operation mode, or the case where the second* stage ST2* of the ballast water treatment method is executed.

In each of the configuration examples shown in FIGS. 20 and 21, switching of the opening and closing of the valves Vn, Vn* and adjustment of the opening are controlled unless some or all of these operations are manually performed. It is automatically performed according to a control program preinstalled in the device PLC or another control device (not shown).

If the concentration of the reducing substance An* extracted from the tank Tn through the branch piping Lns is unnecessarily high, dilute it with water beforehand and use it.

The technical scope of the present invention is not limited to the above embodiment, and can be implemented in various forms without changing the gist of the invention. For example, the following modifications do not change the gist of the invention and therefore belong to the technical scope of the present invention.
(Modification 1) Modification of the basic configuration of the second embodiment In the case of the basic configuration of the second embodiment shown in FIG. 13, ballast water intake between the position Qt and the ballast tank T. The piping line Lf and the ballast water drainage pipe Lr are configured to be a common pipe line (Qt-V5-Sn1-Ft-T). On the other hand, in the case of the modification of the basic configuration of the second embodiment shown in FIG. 22, each of the ballast water intake pipe line Lf and the ballast water drainage pipe line Lr is While being connected to the ballast tank T, the position Qts of the ballast water intake pipe line Lf and the position Qtr of the ballast water drainage pipe line Lr are bridged by a part of the inboard circulation pipe line Lc equipped with the valve V5*. is there. The position Qts is a position downstream of the mixer Mxs, upstream of the valve V3, and upstream of the valve V5*. The position Qtr is a position downstream of the valve V4, downstream of the valve V5*, and upstream of the reducing agent injection port In.

In the modified example of the basic configuration of the second embodiment shown in FIG. 22, the ballast water intake pipe line Lf is IT→V1→Q6→Pm→Vcm→Q3→Q4→V2→F→Is/Id. → Mxs → Qts → V3 → Sn1s → Fts → T piping route, ballast water drainage piping route Lr is T → Ftr → Sn1r → V4 → Qtr → In → Mxn → Q1 → V6 → Q6 → Pm → Vcm → It becomes the piping route of Q3 → Q4 → V7 → Q2 → Sn2 → DO. <Lc1> of the inboard circulation piping route Lc is Pm→Vcm→Q3→V9→Q5→Is/Id→Mxs→Qts→V5＊→Qtr→In→Mxn→Q1→V6→Q6→Pm In addition, <Lc2> is a piping path that is closed (thus circulating) without passing through the ballast tank T, and <Lc2> is Pm → Vcm → Q3 → Q4 → V2 → F → Q5 → Is/Id → Mxs → Qts → V5* →Qtr→In→Mxn→Q1→V6→Q6→Pm It becomes a closed (thus circulating) piping path without going through the ballast tank T, and the setting of opening and closing the valve in each piping path is As shown in Table 4. Table 5 shows the settings for opening and closing the valve in each operation mode of the ballast pump Pm.

(Modification 2) Modification of Basic Configuration of First Embodiment Also in the case of the basic configuration of the first embodiment shown in FIG. 2, for ballast water intake between the position Qt and the ballast tank T. Since the piping path Lf and the ballast water drainage piping path Lr are configured to be a common piping path (Qt-V5-Sn1-Ft-T), the second embodiment shown in FIG. The same modification as the modification of the basic configuration of is possible.
(Modification 3) Another modification 1 of the basic configuration of the second embodiment 1) Basic configuration and piping route FIG. 23 is an explanatory diagram of another modification of the basic configuration of the second embodiment of the present invention. .. In FIG. 23, the valves and the measuring devices are not shown for the sake of simplicity of description. In the modified example 3 shown in FIG. 23, similarly to the modified example 1, the ballast water intake piping route Lf and the ballast water drainage piping route Lr are connected to the ballast tank T, respectively. On the other hand, unlike the first modification, the reducing agent injection port In is arranged between the sterilizing agent injection port/residue injection port Is/In and the ballast tank T.

24: is explanatory drawing of the 1st operation mode of the ballast pump in the modification 3 shown in FIG. 23, and FIG. 25 is the 3rd of the ballast pump in the modification 3 shown in FIG. It is explanatory drawing of a driving mode. 26 to 29 are explanatory diagrams of A type to D type in the second operation mode of the ballast pump in the modified example 3 shown in FIG. 23, respectively.

In the modified example of the basic configuration of the second embodiment shown in FIG. 23, the ballast water intake pipe path Lf is IT→Qa→Pm, as depicted by bold characters in FIGS. 24 to 27. → Vcm → Qb → F → Qc → Is/Id → Mxc → Qe → T piping route, and ballast water drainage piping route Lr is T → Qa → Pm → Vcm → Qb → Qd → Qc → In → Mxc → It becomes the piping path of Qe→DO, and the piping path for inboard circulation <Lc1> is a ballast tank T such as Pm→Vcm→Qb→Qd→Qc→Is/Id→In→Mxc→Qe→T→Qa→Pm. <Lc2> is a piping route through the ballast tank T such as Pm→Vcm→Qb→F→Qc→Is/Id→In→Mxc→Qe→T→Qa→Pm.

Position Qa is located downstream of the inlet IT of the ballast water intake pipe line Lf, upstream of the ballast pump Pm, and downstream of the ballast tank T of the ballast water drainage pipe line Lr and upstream of the ballast pump Pm. Is. The position Qb is a position downstream of the ballast pump Pm in the ballast water intake pipe line Lf and the ballast water drainage pipe line Lr and upstream of the filter device F, and the position Qc is the ballast water intake pipe line Lf and the ballast. It is a position downstream of the filter device F of the water drainage pipe route Lr, and upstream of the germicide inlet/residue inlet Is/Id, and the position Qd is between the position Qb and the position Qc, and the filter device F. Is a position located downstream of the position Qb and upstream of the position Qc in the pipe path that connects without passing through. The position Qe is located downstream of the mixer Mxc and upstream of the drainage port DO of the ballast water intake piping path Lf, the ballast water drainage piping path Lr, and the inboard circulation piping path Lc, and the ballast water intake piping path Lf. This is a position upstream of the ballast tank T.

Mxc is a mixer. In the second embodiment, a mixer Mxs for stirring the seawater in which the chlorine-based bactericide As or the bactericide residue Re is injected and a mixer Mxn for stirring the seawater in which the reducing agent An is injected are installed. However, in the third modification, it is sufficient to install one common mixer Mxc.
2) Sterilizer supply device S
The disinfectant supply device S according to the third modification has the same configuration as the disinfectant supply device according to the second embodiment shown in FIG. 13, and the function and the role thereof are not changed.

Therefore, the description of the disinfectant supply device according to the second embodiment is made on the line configuration of the ballast water intake pipe line Lf (IT → Qa → Pm → Vcm → Qb → F → Qc → Is/Id → Mxc → Qe. → The same applies to the disinfectant supply device S in Modification 3 except that T) is different.
3) Removal of bactericide residue Re For the description of the removal of the bactericide residue in the second embodiment, the route configuration of the in-vehicle circulation pipe line <Lc1> (Pm→Vcm→Qb→Qd→Qc→Is/ Id → In → Mxc → Qe → T → Qa → Pm) and the route configuration of the inboard circulation piping <Lc2> (Pm → Vcm → Qb → F → Qc → Is/Id → In → Mxc → Qe → T → Qa →Pm) is different, and the removal of the bactericide residue Re in Modification 3 is also applicable. The modified example of removing the disinfectant residue and the description thereof shown in FIGS. 10 and 11 also apply to the modified example of removing the disinfectant residue Re in Modification Example 3.
4) Reductant supply device N
The reducing agent supply apparatus N in the third modification has the same configuration as the reducing agent supply apparatus in the second embodiment shown in FIG. 13, and the function and role are the same.

Therefore, the description of the disinfectant supply device and the modified example thereof in the second embodiment is for the route configuration of the inboard circulation piping route <Lc1> (m→Vcm→Qb→Qd→Qc→Is/Id→In→In→ (Mxc → Qe → T → Qa → Pm) and the route configuration of the inboard circulation piping <Lc2> (Pm → Vcm → Qb → F → Qc → Is/Id → In → Mxc → Qe → T → Qa → Pm) Except for different points, the description applies to the reducing agent supply device N and its modification in this modification. In particular, the configuration example of extracting the reducing substance An* and the description thereof shown in FIGS. 20 and 21 are directly applicable to the configuration example of extracting the reducing substance An* in the third modification.
5) Operation mode of ballast pump Pm The first operation mode of the ballast pump Pm in this modification 3 shown in FIG. 24 is the configuration of the ballast water intake pipe path Lf (IT→Qa→Pm→Vcm). →Qb→F→Qc→Is/Id→In→Mxc→Qe→T), which is the same as the first operation mode of the ballast pump in the second embodiment shown in FIG. .. In the third operation mode of the ballast pump according to Modification 3 shown in FIG. 25, the path configuration of the ballast water drainage piping path Lr (T → Qa → Pm → Vcm → Qb → Qd → Qc → In → It is the same as the third operation mode of the ballast pump in the second embodiment shown in FIG. 15, except that (Mxc→Qe→DO) is different. 26 to 29, types A to D of the second operation mode of the ballast pump according to the modified example 3 are the route configuration of the inboard circulation piping route <Lc1> and the inboard circulation piping route. It is the same as the second operation mode of the ballast pump in the second embodiment shown in FIGS. 16 to 19 except that the path configuration of <Lc2> is different.
6) Ballast Water Treatment Method For the explanation of the process flow of the ballast water treatment method and its modification shown in FIG. 12, the sterilant inlet Is and the residue inlet Id are both sterilant inlets. If it is replaced with the combined residue injection port Is/Id, the process flow of the ballast water treatment method and its modification in the second embodiment is also applicable.

In each of the configuration examples shown in FIGS. 20 and 21, switching of the opening and closing of the valves Vn, Vn* and adjustment of the opening are controlled unless some or all of those operations are manually performed. It is automatically performed according to a control program preinstalled in the device PLC or another control device (not shown).
(Modification 4) Modification in which the ballast pump Pm includes a plurality of ballast pumps In FIGS. 2 and 13, only one ballast pump Pm is illustrated. However, the ballast pump Pm in the present invention is not limited to one configured by only one ballast pump, and may be configured by a plurality of ballast pumps. For example, when the ballast pump Pm includes two ballast pumps Pm1 and Pm2, the following modifications are possible.
(Modification 4-1)
When the ballast pump Pm1 is in the first operation mode, the chlorine-based bactericide As is injected into the seawater Wo taken from outside the vessel that flows toward the ballast tank T, and when in the second operation mode, The bactericide residue Re that remains without being injected into the seawater Wo taken from the outside of the ship in the operation mode 1 is removed. After that, when the ballast pump Pm2 switched from the ballast pump Pm1 is in the third operation mode, the ballast water Wt taken from the ballast tank T is discharged outboard as the ballast water Wn into which the reducing agent An has been injected.
(Modification 4-2)
When there are multiple ballast tanks (T1 and T2 are assumed), when the ballast pump Pm1 is in the first operation mode, chlorine-based chlorine is used for the seawater Wo that flows from the outboard to the ballast tank T1. The bactericide As is injected, and when in the second operation mode, the bactericide residue Re that remains without being injected into the seawater Wo taken from the outside in the first operation mode is removed. On the other hand, when the ballast pump Pm2 is in the first operation mode, when the chlorine-based germicide As is injected into the seawater Wo taken from the outboard of the vessel that flows toward the ballast tank T2, and the second operation mode is in effect. , The bactericide residue Re that remains without being injected into the seawater Wo taken from the outside during the first operation mode is removed. Then, when the ballast pump Pm1 switched from the ballast pump Pm2 is in the third operation mode, the ballast water Wt taken from the ballast tank T2 is discharged to the outside of the ship as the ballast water Wn into which the reducing agent An has been injected. When the ballast pump Pm2 switched from the ballast pump Pm1 is in the third operation mode, the ballast water Wt taken from the ballast tank T1 is discharged outboard as the ballast water Wn into which the reducing agent An has been injected.

If the ballast pumps Pm1 and Pm2 are integrally captured and the ballast pump Pm is assumed to be the ballast pump Pm, the modification 4-1 flows toward the ballast tank T when the ballast pump Pm is in the first operation mode. The chlorine-based germicide As is injected into the seawater Wo taken from the outside of the ship, and remains without being injected into the seawater Wo taken from the outside of the ship in the first operation mode when in the second operation mode. Remove the germicide residue Re. After that, when the ballast pump Pm switched from the ballast pump Pm is in the third operation mode, the ballast water Wt taken from the ballast tank T is discharged outboard as the ballast water Wn into which the reducing agent An has been injected. Nothing else. Further, in the modified example 4-2, when the ballast pump Pm is in the first operation mode, the chlorine-based sterilizer As is added to the seawater Wo taken from the outboard that flows toward the ballast tank T1 (or T2). When the second operating mode is injected, the bactericide residue Re that remains without being injected into the seawater Wo taken from the outboard in the first operating mode is removed. After that, when the ballast pump Pm switched from the ballast pump Pm is in the third operation mode, the ballast water Wt taken from the ballast tank T1 (or T2) is discharged outboard as the ballast water Wn into which the reducing agent An has been injected. Yes, nothing more than an example.

The technical scope of the present invention extends to an equivalent range. The meaning or interpretation of each term in the present specification does not prevent the technical scope of the present invention from extending to an equivalent range.
Hereinafter, the inventions described in the claims at the initial application of the present application will be additionally described.
[1]
A ship comprising a ballast pump for circulating seawater taken from outside the ship, a ballast tank for containing the seawater, and a ballast water treatment device for sterilizing the seawater contained in the ballast tank,
The ballast pump has a first operation mode in which seawater taken from the outside is circulated toward the ballast tank and is stored in the ballast tank, and a second operation mode in which the seawater taken from the outside is circulated in the ship. Is equipped with
The ballast water treatment device has a sterilizing agent inlet for injecting a chlorine-based sterilizing agent into seawater flowing toward the ballast tank in the first operation mode, and the second operating mode in the second operation mode. A residual material injection port for injecting at least a part of the residue of the chlorine-based bactericide, which remains without being injected into seawater in the first operation mode, into the seawater circulating in the ship.
A ship characterized by the above.
[2]
The ship according to [1], wherein the second operation mode is an operation mode that starts within 3 hours after the end of the first operation mode.
[3]
The said residue injection port is an injection port which inject|pours the water which added the momentum with a pump to the seawater which circulates toward the said ship, [1] characterized by the above-mentioned.
[4]
The water according to [3], wherein the water is fresh water.
[5]
[4] The ship according to [4], wherein the fresh water is fresh water produced by desalinating seawater by a seawater desalination apparatus installed on the ship.
[6]
The water according to [3], wherein the water is water containing a reducing substance.
[7]
The ballast pump has a third operation mode in which the seawater taken from the ballast tank is circulated inside the ship and drained to the outside of the ship, and the ballast water treatment device, when in the third operation mode, The ship according to [1], which is a device including a reducing agent injection port for injecting a reducing agent into seawater flowing from a ballast tank toward the outside of the ship.
[8]
The residue injection port is for injecting a reaction product formed by reacting at least a part of the residue of the chlorine-based bactericide with a part of the reducing agent into seawater flowing toward the outboard. The ship according to [7].
[9]
The disinfectant injection port also serves as the residue injection port, and the reducing agent injection port is located downstream of the residue injection port in the flow direction of seawater flowing toward the outboard. The ship according to [7].
[10]
The chlorine-based bactericide is an aqueous solution of any one of trichloroisocyanuric acid, sodium dichloroisocyanurate, sodium dichloroisocyanurate hydrate and potassium dichloroisocyanurate, and the solvent of the aqueous solution is fresh water. The ship according to [1].
[11]
[10] The ship according to [10], wherein the fresh water is fresh water obtained by desalinating seawater by a seawater desalination apparatus installed in the ship.

VSL... Ship, IT... Intake, DO... Drainage, Lf... Ballast water intake piping, Lr... Ballast water drainage piping, Lc, <Lc1>, <Lc2>... Shipboard circulation piping, Ld... Residue discharge pipe line, Ls... Sterilizer pipe line, Ln... Reductant pipe line, Ls*, Ldr, Ldr*... Residue pipe line, Lns... Branch pipe line, V1 to V9, Vs, Vn... Valve, Pm... Ballast pump, Ps, Pn... Pump, S... Sterilization supply device, N... Reductant supply device, T... Ballast tank, Ts, Tn... Tank, Is... Sterilizer inlet, In... Reductant inlet, Id … Residue injection port, Is/Id… sterilizer injection port and residue injection port, Mxs, Mxn, Mxc… Mixer, Fs, Fn, Ft… Flowmeter, Sn1, Sn2… TRO measurement device, As… Chlorine-based sterilization Agents, An...reducing agents, ms...chlorine-based germicide raw materials (chlorine-based chemicals), mn...reducing agent raw materials, ws, wn...water, Cs, Cn...mixtures, Re...fungicidal residue, Wo...ships Seawater taken from outside, Ws... seawater injected with bactericide, Wt... seawater taken from ballast tank (ballast water), Wn... ballast water injected with reducing agent, Wd, Wo*... bactericide residue Injected seawater

Claims (11)

A ship comprising a ballast pump for circulating seawater taken from outside the ship, a ballast tank for containing the seawater, and a ballast water treatment device for sterilizing the seawater contained in the ballast tank,
The ballast pump has a first operation mode in which seawater taken from the outside is circulated toward the ballast tank and is stored in the ballast tank, and a second operation mode in which the seawater taken from the outside is circulated in the ship. Is equipped with
In the first operation mode, the ballast water treatment device includes a sterilizing agent inlet for injecting a chlorine-based sterilizing agent into seawater flowing toward the ballast tank, and a sterilizing agent supply including the sterilizing agent inlet. An apparatus and, in the second operation mode, at least a part of the residue of the chlorine-based disinfectant remaining in the pipe of the disinfectant supply device that is not injected into seawater in the first operation mode. It comprises a residue inlet for injecting seawater circulating on board, and
A ship characterized by the above. The marine vessel according to claim 1, wherein the second operation mode is an operation mode that starts within 3 hours after the end of the first operation mode. The marine vessel according to claim 1, wherein the residual material inlet is an inlet for injecting water, which is urged by a pump, into seawater flowing toward the outside of the ship. The marine vessel according to claim 3, wherein the water is fresh water. The said fresh water is the fresh water which desalinates seawater with the seawater desalination apparatus installed in the ship, The ship of Claim 4 characterized by the above-mentioned. The water according to claim 3, wherein the water is water containing a reducing substance. The ballast pump has a third operation mode in which the seawater taken from the ballast tank is circulated inside the ship and drained to the outside of the ship, and the ballast water treatment device, when in the third operation mode, The marine vessel according to claim 1, wherein the marine vessel has a reducing agent injection port for injecting a reducing agent into seawater flowing from a ballast tank to the outside of the vessel. The residue injection port is for injecting a reaction product formed by reacting at least a part of the residue of the chlorine-based bactericide with a part of the reducing agent into seawater flowing toward the outboard. The ship according to claim 7, wherein The disinfectant injection port also serves as the residue injection port, and the reducing agent injection port is located downstream of the residue injection port in the flow direction of seawater flowing toward the outboard. The ship according to claim 7, characterized in that The chlorine-based bactericide is an aqueous solution of any one of trichloroisocyanuric acid, sodium dichloroisocyanurate, sodium dichloroisocyanurate hydrate and potassium dichloroisocyanurate, and the solvent of the aqueous solution is clear water. The ship according to claim 1. The ship according to claim 10, wherein the fresh water is fresh water produced by desalinating seawater by a seawater desalination apparatus installed in the ship.