JP2007130563A - Ballast water use system - Google Patents

Abstract

An object of the present invention is to provide a system for using ballast water that can secure cleaning water for the apparatus and can be used for various purposes.
An apparatus for treating microorganisms and bacteria in seawater or fresh water, which requires at least one cleaning per day during the treatment, and is treated by the ballast water treatment apparatus 3 A ballast tank 4 for storing the ballast water, and a service tank 5 for storing the ballast water treated by the ballast water treatment device 3 is provided, and the ballast water in the service tank 5 is used as the ballast water. A system for using ballast water, which is used for cleaning the treatment device 3.
[Selection] Figure 1

Description

  The present invention relates to a ballast water utilization system, and more particularly to a ballast water utilization system that can be used as various types of utility water.

  A cargo ship that transports crude oil or the like is provided with a ballast tank in order to maintain the stability of the hull during navigation. Normally, when crude oil or the like is not loaded, the inside of the ballast tank is filled with ballast water, and when the crude oil or the like is loaded, the ballast water is discharged to adjust the buoyancy of the hull and stabilize the hull.

  As described above, the ballast water is water necessary for the safe navigation of the ship, and the seawater of the port that performs cargo handling is usually used. The amount is said to exceed 10 billion tons per year worldwide.

  By the way, the ballast water contains microorganisms and eggs of small and large organisms that live in the port where the water was taken, and these microorganisms and eggs of small and large organisms are transported to different countries at the same time as the ship moves. It will be.

  Therefore, the destruction of ecosystems, such as the replacement of existing species with species that did not originally live in the sea area, has become serious.

  Against this background, the diplomatic meeting of the International Maritime Organization (IMO) adopted the obligation to receive periodic inspections for ballast water treatment equipment, etc., and is scheduled to be applied from 2009 and later on construction ships. .

  In addition, due to the convention for the regulation and management of ship ballast water and sediment (hereinafter referred to as the Convention), the discharge standards for ballast water will be as shown in Table 1 below.

  For this reason, it is necessary to sterilize or disinfect up to about 1 / 100th of the number of microorganisms present in the open ocean when ballast water is discharged.

  From the background as described above, there is an urgent need to develop a sterilization / sterilization technique for ballast water that can solve the above problems.

Conventionally, as a technique for sterilizing and sterilizing ballast water, a chemical method using ozone (Patent Document 1), a filtration process (Patent Document 2), a membrane process (Patent Document 3), and a buffer tank for operating a pump (Patent Document) Document 4) is known.
JP 2004-160437 A JP 2005-152799 A JP 2003-265935 A JP-A-2005-161292

  Patent Document 1 proposes a technique for injecting ozone into ballast water in combination with steam injection, and further sterilizing ozone while reducing the amount of ozone used by promoting the generation of hydroxyl radicals by making bubbles fine. Yes. However, there is a limit to reducing the amount of ozone used.

  In the filtration process and the membrane process described in Patent Documents 2 and 3, the apparatus needs to be cleaned in order to continue the operation for a long time.

  However, there is a problem that ballast water such as seawater and fresh water once introduced into the ballast tank cannot be used for other purposes because of the safety of ship operation.

  Then, the subject of this invention is providing the utilization system of the ballast water which can ensure the washing water of an apparatus and can be used for various uses.

  Other problems of the present invention will become apparent from the following description.

  The above problems are solved by the following inventions.

(Claim 1)
A device for treating microorganisms and bacteria in seawater or fresh water, which needs to be washed at least once a day during processing, and stores ballast water treated by the ballast water treatment device A ballast tank,
A service system for storing ballast water treated by the ballast water treatment apparatus is provided, and the ballast water use system is provided for cleaning the ballast water treatment apparatus.

(Claim 2)
2. The ballast water utilization system according to claim 1, wherein the ballast water treatment apparatus is a filtration apparatus for separating and removing microorganisms and bacteria or a treatment apparatus using mechanical shearing.

(Claim 3)
The ballast water treatment device according to claim 1, wherein the ballast water treatment device comprises a filtration device for separating and removing microorganisms and bacteria, and a sterilization device for sterilization by ultraviolet light or ultraviolet light disposed in the subsequent stage. system.

(Claim 4)
2. The system for using ballast water according to claim 1, wherein the ballast water treatment device comprises a treatment device using mechanical shearing and a sterilization device for sterilization by ultraviolet light or ultraviolet light disposed in the subsequent stage. .

(Claim 5)
The ballast water utilization system according to claim 3 or 4, wherein the ballast water in the service tank is used as dilution water of a sterilizer in a sterilizer for sterilization with a sterilizer.

(Claim 6)
The ballast water utilization system according to any one of claims 1 to 5, wherein the ballast water in the service tank is introduced into a reverse osmosis membrane treatment device to produce drinking water or intermediate water.

  ADVANTAGE OF THE INVENTION According to this invention, the washing water of an apparatus can be ensured and the utilization system of the ballast water which can be used for various uses can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an explanatory diagram of a system for using ballast water according to the present invention, in which 1 is a hull of a ship such as a tanker, 2 is seawater or fresh water (hereinafter simply referred to as “seawater”) outside the ship 1. ”).

  3 is a device for treating microorganisms and bacteria in seawater or fresh water, and a ballast water treatment device that requires washing at least once a day during the treatment.

  4 is a ballast tank for storing the ballast water treated by the ballast water treatment device 3.

  A service tank 5 stores the ballast water processed by the ballast water treatment apparatus 3. After the ballast tank 4 is filled with ballast water or in the process of filling, it is preferable to send the ballast water to the service tank 5 so that the service tank 5 is full.

  One service tank 5 may be provided when the capacity is large, and a plurality of service tanks 5 may be provided when the capacity is small.

  The service tank 5 may be formed in a cylindrical shape or a square shape by using a normal resin or a corrosion-resistant steel plate (SUS, etc.), but is formed of a flexible material when a certain space cannot be secured on the ship. Also preferred are the containers. Examples of the service tank formed of a flexible material include a resin film, a cloth bag with rubber lining, and a reinforcing fiber cloth bag.

  Reference numeral 6 denotes a pipe for supplying cleaning water to the ballast water treatment device 3. In the present invention, the ballast water treatment device 3 requires cleaning at least once a day while the treatment is continued as described above. Therefore, the ballast water in the service tank 5 is supplied to the ballast water treatment device 3 as the cleaning water.

  Ballast water such as seawater and fresh water introduced into the ballast tank cannot be used for other purposes due to the safety of ship operation. That is, if such ballast water is used, there is a risk that the ship will be out of balance and the ship will capsize. Therefore, there is a need for the service tank 5 according to the present invention, and an important function is exhibited. The concept of such a service tank has never existed before.

  In the present invention, as the ballast water treatment device 3, a filtration device 30 for separating and removing microorganisms and bacteria as shown in FIG. 2A, or mechanical shearing as shown in FIG. It is preferable that the processing apparatus 31 is used.

  Examples of the filtration device 30 for separating and removing microorganisms and bacteria include a filtration device using a filter medium and a membrane filtration device.

  According to such a membrane treatment apparatus, microorganisms and bacteria larger than the pore size of the membrane can be separated and removed.

  Examples of the membrane filtration device include membrane treatment devices using a filtration membrane (for example, a microfiltration membrane). These membrane treatment devices cause clogging of the membrane as the treatment continues, so the membrane is filtered after a predetermined time of filtration. Requires cleaning.

  Moreover, as another preferable aspect of the present invention, the ballast water treatment device 3 includes a filtration device 30 for separating and removing microorganisms and bacteria as shown in FIG. It is preferable to comprise the sterilizer 32 which sterilizes with ultraviolet rays.

  Examples of the sterilizer 32 that performs sterilization with a sterilizer or ultraviolet light include a sterilizer using a sterilizer such as chlorine and hypochlorite, and a photo-oxidation apparatus using an ultraviolet lamp.

  It is also preferable to use a bactericide and ultraviolet rays in combination.

  In a sterilizer using a sterilizer, dilution water for adjusting the sterilizer to a predetermined concentration is required. In this invention, it is preferable to use the ballast process water in a service tank as this dilution water. Also in this case, the ballast water in the ballast tank cannot be used as described above.

  In addition, when an ultraviolet lamp is used, it is also preferable to use the ballast-treated water in the service tank for cleaning the ultraviolet lamp.

  As the shear processing device 31 using mechanical shearing, as shown in FIG. 3, a shielding plate 312 having a plurality of holes 311 is provided in a cylindrical body 310, and seawater or fresh water is introduced from one side, When colliding with the shielding plate 312 and passing through the hole 311, microorganisms and the like are torn off by a shearing force so as to be killed or preliminarily treated.

  In the present invention, the ballast water treatment device 3 is a treatment device 31 that utilizes mechanical shearing as shown in FIG. 2D and a sterilization device 32 that performs sterilization using a bactericide or ultraviolet light disposed in the subsequent stage. It is preferable that it consists of. This is because asphyxic microorganisms and bacteria that have passed through the hole 311 of the processing apparatus 31 can be reliably processed by the sterilization apparatus.

  In addition, it is also preferable to arrange | position the membrane processing apparatus by a filtration membrane in the back | latter stage of the processing apparatus 31 using mechanical shearing.

  Even in the above-described shearing device 31, it is necessary to wash away microorganisms clogged in the holes 311 after a predetermined time has elapsed. Therefore, in the present invention, it is important to use the ballast-treated water in the service tank as described above, and this is an unprecedented idea.

  As mentioned above, although the preferable ballast water treatment apparatus of this invention was demonstrated, in addition to the above, an electrolysis process, an ion exchange membrane process, etc. are mentioned as a preferable aspect, These are used together with a membrane process and a shearing process, or alone. Can be adopted.

  Further, in the present invention, although not shown, it is also a preferable aspect that the ballast-treated water in the service tank 5 is introduced into a reverse osmosis membrane treatment apparatus and processed to produce drinking water or middle water.

  In FIG. 1, reference numeral 7 is a pipe for supplying the ballast water in the service tank 5 for various uses other than the above-described cleaning.

  Examples of other various uses include securing inboard water, securing deck cleaning water, and using it for hypochlorous acid generated water.

Explanatory drawing of the utilization system of ballast water concerning the present invention The figure which shows the example of the ballast water treatment apparatus preferably employable for this invention Main part sectional drawing of the ballast water treatment apparatus which can be preferably employ | adopted for this invention

Explanation of symbols

1: Hull 2: Ballast pump 3: Ballast water treatment device 30: Filtration device 31: Treatment device using mechanical shear (shear treatment device)
32: Sterilizer 310: Cylindrical body 311: Multiple holes 312: Shield plate 4: Ballast tank 5: Service tank 6: Piping 7: Piping

Claims (6)

A device for treating microorganisms and bacteria in seawater or fresh water, which needs to be washed at least once a day during processing, and stores ballast water treated by the ballast water treatment device A ballast tank,
A service system for storing ballast water treated by the ballast water treatment apparatus is provided, and the ballast water use system is provided for cleaning the ballast water treatment apparatus.   2. The ballast water utilization system according to claim 1, wherein the ballast water treatment apparatus is a filtration apparatus for separating and removing microorganisms and bacteria or a treatment apparatus using mechanical shearing.   The ballast water treatment device according to claim 1, wherein the ballast water treatment device comprises a filtration device for separating and removing microorganisms and bacteria, and a sterilization device for sterilization by ultraviolet light or ultraviolet light disposed in the subsequent stage. system.   2. The system for using ballast water according to claim 1, wherein the ballast water treatment device comprises a treatment device using mechanical shearing and a sterilization device for sterilization by ultraviolet light or ultraviolet light disposed in the subsequent stage. .   The ballast water utilization system according to claim 3 or 4, wherein the ballast water in the service tank is used as dilution water of a sterilizer in a sterilizer for sterilization with a sterilizer. The ballast water utilization system according to any one of claims 1 to 5, wherein the ballast water in the service tank is introduced into a reverse osmosis membrane treatment device to produce drinking water or intermediate water.

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