JP2014200731A - Ultraviolet lamp for water treatment and ballast water treatment apparatus - Google Patents

Abstract

An ultraviolet irradiation device for water treatment with a small maintenance space and a ballast water treatment device using the same are provided. An ultraviolet lamp unit and a plurality of cylindrical chambers provided inside the ultraviolet lamp unit for irradiating water to be treated with ultraviolet rays, wherein the chamber has at least one of its cylindrical ends. Are connected in series so that the water to be treated flows continuously through the plurality of chambers, and the ultraviolet lamp unit is attachable / detachable by the attach / detach opening. The constructed ultraviolet treatment device for water treatment is used. [Selection] Figure 2

Description

  The present invention relates to an ultraviolet irradiation apparatus for water treatment for killing microorganisms in a liquid. In particular, the present invention relates to a water treatment ultraviolet irradiation device for killing microorganisms in ballast water used in a treatment system for ballast water stored in a ship and a ballast water treatment device using the same.

  In recent years, the treatment of ballast water loaded on ships has become a problem. Ballast water is seawater that is loaded on a ship for safe navigation even in an empty state. Ballast water is taken from a nearby sea area when leaving the port, and drained to the ocean when loading the cargo when entering the port. That is, the ballast water composed of the seawater of the departure port is drained at the port of arrival (loading port). For example, when an oil tanker departing from Japan sails to the Middle East, such as Kuwait, an oil-producing country, and loads oil, the seawater in the Japanese sea is loaded as ballast water and drained offshore in the Middle East. It becomes. When ballast water is discharged into a sea area different from the sea area where water is taken, organisms in the seawater are moved to sea areas that are not originally habitats, which greatly affects the marine ecosystem.

  For this reason, various methods of purifying ballast water to remove or kill or inactivate microorganisms have been studied. For example, Patent Document 1 and Patent Document 2 describe a ballast water treatment apparatus using a filtration membrane. The ballast water treatment apparatuses of Patent Document 1 and Patent Document 2 include an ultraviolet lamp that irradiates filtered water with ultraviolet rays, and microorganisms can be killed by the ultraviolet lamp. Further, Patent Document 3 discloses a fluid sterilization apparatus that is configured so that a fluid to be treated flows therethrough and includes an ultraviolet radiation type low-pressure mercury vapor discharge lamp.

JP 2011-194396 A JP 2010-207796 A JP-A-11-265684

  The ultraviolet lamp is housed in an ultraviolet lamp protection tube, and is installed in a chamber that performs ultraviolet irradiation treatment of ballast water as an ultraviolet lamp unit. However, in order to replace or repair the ultraviolet lamp, it is necessary to attach the ultraviolet lamp unit to the chamber or to remove it from the chamber (detachment work). The ultraviolet lamp unit used for the killing treatment of the microorganisms in the ballast water is usually about 0.25 m to 1 m, and there is a long one of about 2 m. Therefore, in order to replace or repair the ultraviolet lamp, a space for attaching / detaching the ultraviolet lamp unit to / from the chamber, that is, an ultraviolet lamp replacement space is required. The ultraviolet lamp replacement space has a width approximately corresponding to the length of the ultraviolet lamp unit from the opening of the chamber.

  Further, in the vicinity of the opening of the chamber, a space for attaching a flange serving as a lid of the chamber to the chamber or removing it from the chamber (detaching operation), that is, an attaching / detaching operation space is also required.

  Since the ballast water treatment device is installed in the ship, in order to use the space in the ship efficiently, the substantial total space of the UV lamp replacement space and the attaching / detaching work space, that is, the maintenance space is made as small as possible. It is desirable to do. That is, it is a problem to improve the treatment effect by ultraviolet irradiation in the smallest possible arrangement space and reduce the cost of the entire apparatus.

  As a result of intensive studies, the inventors of the present application have confirmed that the configuration of the ultraviolet irradiation device, the arrangement of the ultraviolet lamp replacement space, and the arrangement of the attachment / detachment work space are related to the size of the maintenance space, and have reached the present invention.

  That is, the present invention includes an ultraviolet lamp unit, and a plurality of cylindrical chambers provided inside the ultraviolet lamp unit for irradiating the water to be treated with ultraviolet rays. The chamber has a cylindrical end portion. At least one has an attachment / detachment opening for the ultraviolet lamp unit, and is connected in series so that water to be treated flows continuously through the chambers, and the ultraviolet lamp unit is attached / detached by the attachment / detachment opening. It is the ultraviolet irradiation device for water treatment comprised so that it is possible.

  Moreover, this application provides the ballast water treatment apparatus provided with the said ultraviolet irradiation device for water treatment.

  According to the said invention, it becomes possible to provide the ultraviolet irradiation apparatus for water treatment with a small maintenance space, and a ballast water treatment apparatus using the same. Therefore, in the arrangement space as small as possible, the processing effect by ultraviolet irradiation can be improved, and the cost of the entire apparatus can be reduced.

It is a figure which shows an example of the ultraviolet irradiation apparatus for water treatment, Comprising: It is a figure which shows typically the structure of a vertical cross section. It is a figure which shows an example of the ultraviolet irradiation apparatus for water treatment by this invention, Comprising: It is a figure which shows typically the structure of a vertical cross section. It is a figure which shows an example of the ultraviolet irradiation apparatus for water treatment by this invention, Comprising: It is a figure which shows typically the structure of a vertical cross section. It is a figure which shows an example of the ultraviolet irradiation apparatus for water treatment by this invention, Comprising: It is a figure which shows typically the structure of a vertical cross section. It is a figure which shows typically the structure of the AA cross section in FIG. It is a figure which shows an example of the ultraviolet irradiation apparatus for water treatment by this invention, Comprising: It is a figure which shows typically the structure provided with the baffle plate inside a connecting pipe. It is a figure which shows typically the structure of the BB cross section of the baffle plate in FIG. It is a figure which shows an example of the ultraviolet irradiation apparatus for water treatment by this invention, Comprising: It is a figure which shows typically the structure provided with the baffle plate inside the chamber. It is a figure which shows an example of the ultraviolet irradiation apparatus for water treatment by this invention, Comprising: It is a figure which shows typically the structure provided with the baffle plate inside the chamber. It is a figure which shows typically the structure of CC cross section of the baffle plate in FIG. 8 and FIG. It is a figure explaining the example of whole composition of the ballast water treatment system using a ballast water treatment device. It is a longitudinal cross-sectional schematic diagram which shows the structural example of the filtration apparatus part of a ballast water treatment apparatus. It is a figure which shows the DD cross section of FIG. 12 typically.

[Description of Embodiment of Present Invention]
First, embodiments of the present invention will be listed and described. (1) An ultraviolet lamp unit, and a plurality of cylindrical chambers provided inside the ultraviolet lamp unit for irradiating the water to be treated with ultraviolet rays, wherein the chamber is provided on at least one of the cylindrical ends. The ultraviolet lamp unit has a detachable opening, and is connected in series so that water to be treated flows continuously through the plurality of chambers, and the ultraviolet lamp unit is configured to be detachable by the detachable opening. This is an ultraviolet irradiation device for water treatment.

  In the ultraviolet treatment apparatus for water treatment as an embodiment of the present invention, the water to be treated is caused to flow along the longitudinal direction of the ultraviolet lamp inside the chamber. Therefore, the water to be treated is subjected to ultraviolet irradiation treatment in a longer time as the longitudinal direction of the ultraviolet lamp is longer. That is, the longer the ultraviolet lamp, the longer the ultraviolet irradiation treatment can be performed on the water to be treated. On the other hand, in order to replace or repair the ultraviolet lamp, the ultraviolet lamp unit needs to be attached to and detached from the chamber. Therefore, a space for attaching / detaching the ultraviolet lamp unit, that is, an ultraviolet lamp replacement space is required. Therefore, if the ultraviolet lamp unit is lengthened in order to irradiate the water to be treated with ultraviolet rays for a long time, the ultraviolet lamp replacement space becomes large.

  In the vicinity of the opening of the chamber, work such as attaching / detaching a flange serving as a lid of the chamber and repairing the electrode wiring of the ultraviolet lamp are performed. A space for this work, that is, a detachable work space is also required.

  However, by configuring the water treatment ultraviolet irradiation device as described above, even if the total length of the ultraviolet lamp is the same, the length per ultraviolet lamp unit can be shortened, and the ultraviolet lamp replacement space and attachment / detachment work can be performed. Space can be arranged efficiently. As a result, the microbe killing ability by ultraviolet irradiation is the same, but the substantial total space of the ultraviolet lamp replacement space and the attaching / detaching work space, that is, the maintenance space can be reduced.

  The size of the attaching / detaching work space is not related to the length of the ultraviolet lamp. Therefore, the present application is an invention that is effective mainly when the total length of the ultraviolet lamp is larger than the width of one attachment / detachment work space.

  (2) Two chambers and two ultraviolet lamp units are provided, the detachable opening is provided at one end of the chamber, and the chambers are connected at the other end. The ultraviolet lamp unit may be arranged on the same axis. By disposing the ultraviolet lamp unit on the same axis, the water to be treated can flow in the same direction in the two chambers. For this reason, the disturbance of the flow which arises by changing the direction of the flow of to-be-processed water can be suppressed.

  (3) Moreover, it is good to provide the connection pipe | tube for flowing the said to-be-processed water between the said chambers, and to arrange | position the said chamber in parallel with the cylindrical axis | shaft parallel. Since the chambers are arranged in parallel with their cylindrical axes in parallel, the respective ultraviolet lamp units can be attached to and detached from the chamber by moving them in parallel directions. Therefore, the ultraviolet lamp replacement space is not expanded by the intersection of the ultraviolet lamp units. Furthermore, since the chambers are connected in series by the connecting pipe so that the water to be treated flows continuously inside the chamber, the total length of the space where the water to be treated is subjected to the ultraviolet irradiation treatment is as follows. Can be the same.

  (4) The said chamber has the said attachment / detachment opening part only in one said edge part, and the said attachment / detachment opening part is good to open in the same direction. All the ultraviolet lamp units can be attached to and detached from the chamber in the same direction, improving workability and further reducing the maintenance space.

  (5) A rectifying plate may be further provided inside the connecting pipe. The current plate is a plate for adjusting the flow of fluid. By connecting a plurality of chambers, the flow of the water to be treated inside the chamber may become non-uniform, but the flow of the water to be treated can be made uniform by the current plate.

  The water to be treated flows into the chamber on the downstream side from the connecting pipe. However, when the inflow direction and the flow direction inside the chamber are different, the water to be treated flows quickly and biased to the region on the opposite side of the inlet in the chamber. In this area, the flow rate of the water to be treated tends to decrease. If there is a part where the flow rate of the water to be treated is small, the water to be treated may not be efficiently irradiated with ultraviolet rays. Moreover, there is a possibility that ultraviolet rays are not sufficiently irradiated to the water to be treated which has a fast flow. Therefore, it is desirable that the water to be treated flows as uniformly as possible inside the chamber.

  Therefore, if a flow straightening plate is installed in the connecting pipe to regulate the flow of the water to be treated, the flow rate of the water to be treated can be suppressed in the downstream chamber, and therefore, the ultraviolet rays can be efficiently applied to the water to be treated. Irradiation can be performed. In addition, since the rectifying plate is provided inside the connecting pipe, not inside the chamber, the ultraviolet rays emitted from the ultraviolet lamp are not blocked inside the chamber by the rectifying plate, and the ultraviolet rays are efficiently applied to the water to be treated. Expect to be irradiated.

  Various types of current plates can be used. For example, a plate having a shape along the cross-sectional shape inside the connecting pipe and having a large number of through holes can be used.

  (6) A rectifying plate may be further provided inside the chamber. As described above, when a plurality of chambers are connected, the flow of water to be treated inside the chamber may become uneven. However, by providing a rectifying plate inside the chamber, the chamber is more effectively provided. The flow of water inside can be arranged. Furthermore, even when the inflow direction from the water channel to be treated into the uppermost chamber is different from the flow direction inside the uppermost chamber, by providing a rectifying plate inside the uppermost chamber, the inside of the chamber can be more effectively The water flow can be adjusted.

  The rectifying plate provided inside the chamber can be similar to the rectifying plate provided inside the connecting pipe. However, since there is an ultraviolet lamp unit inside the chamber, the rectifying plate provided inside the chamber has a through hole for inserting the ultraviolet lamp unit.

  (7) A cleaning mechanism for cleaning the ultraviolet lamp unit may be further provided. If dirt adheres to the surface of the UV lamp protection tube, the UV transmittance of the lamp protection tube decreases, and the amount of UV irradiation to the water to be treated decreases. Therefore, if the surface of the UV lamp protection tube is periodically cleaned by a cleaning mechanism for cleaning the UV lamp protection tube, it is possible to prevent a decrease in the amount of UV irradiation. For this reason, an increase in power consumption can be suppressed even when the operation is performed in the UV irradiation constant mode.

  Moreover, although the number of cleaning steps increases when there are a plurality of chambers, it is possible to efficiently clean even when there are a plurality of chambers by providing a cleaning mechanism.

  (8) One chamber may include one ultraviolet lamp unit. When two or more UV lamp units are installed in parallel in one chamber, the inner diameter of the chamber is often larger than when only one UV lamp unit is installed, and the intensity of UV light in the chamber changes. This is because a weakened region may occur.

  Furthermore, the configuration in which only one ultraviolet lamp unit is provided in one chamber is a preferable configuration particularly when a cleaning mechanism for cleaning the ultraviolet lamp protection tube is provided. If only one ultraviolet lamp unit is provided in one chamber, high accuracy is not required for the mounting accuracy of the ultraviolet lamp unit and the dimensional accuracy of the cleaning portion of the cleaning mechanism. Therefore, the complexity of attaching the ultraviolet lamp unit can be reduced and the cost of the cleaning mechanism can be reduced.

  (9) This application provides a ballast water treatment apparatus provided with the above-mentioned ultraviolet irradiation apparatus for water treatment. Since the above-described ultraviolet irradiation apparatus for water treatment has a small maintenance space, even when a ballast water treatment apparatus equipped with the apparatus is installed in the ship, the space in the ship can be used efficiently.

[Details of the embodiment of the present invention]
The structural example of the ultraviolet irradiation apparatus for water treatment as an embodiment of this invention and a ballast water treatment apparatus is demonstrated below, referring drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

(Ballast water treatment system)
First, an example of the entire configuration of a ballast water treatment system using a ballast water treatment apparatus will be described with reference to FIG. The ballast water treatment device includes a filtration device, an ultraviolet irradiation device, and accompanying piping. This system processes seawater taken from a pipe 31 by a pump 41 and stores it in the tank 13 as ballast water. Seawater as filtered water sent to the filtration device 11 via the pipe 32 is filtered by the filtration device 11. The filtered water to be filtered is sent to the microorganism killing means such as the ultraviolet irradiation device 12 through the pipe 33. The filtered water to be filtered, that is, the water to be treated, is subjected to a killing process of microorganisms by the ultraviolet irradiation device 12. Further, the discharged water that has not been filtered in the filtering device 11 is led out of the device through the pipe 35. Seawater that has undergone the microbe killing process is sent to the tank 13 via the pipe 34 and the pipe 36.

  A specific configuration example of the filtration device will be described with reference to FIGS. 12 and 13. 12 and 13 illustrate a part of a marine ballast water treatment apparatus. FIG. 12 is a diagram schematically showing a configuration of a vertical section including an axis, and FIG. 13 is a diagram schematically showing a configuration of a horizontal DD section in FIG. The cylindrical pleated filter 101 is disposed so as to surround the axis E serving as a rotation center, and is rotatably attached around a central pipe 140 (pipe does not rotate) disposed at the center. The upper and lower cylindrical surfaces of the pleated filter are closed watertight. The rotatable mounting structure also needs to be a watertight structure, but a known structure is used without any particular limitation. A case 103 is provided so as to cover the entire filter. The case 103 includes an outer cylinder part 131, a lid part 132, and a bottom part 133, and the bottom part 133 is provided with a discharge channel 108. A filtered water channel 106 and a filtered water nozzle 102 are provided to introduce seawater as filtered water into the case 103. The to-be-filtered water nozzle 102 is extended from the to-be-filtered water flow path 106 so that the nozzle port 121 is provided in the outer cylinder part 131 of the case 103, and the to-be-filtered water flows out toward the outer peripheral surface of a pleat filter. It is configured. A motor 190 is provided on the central axis of the pleat filter for rotating the pleat filter. The motor 190 is covered and accommodated by a motor cover 191 and is driven by electric power from a drive control unit (not shown).

  In the case of this example, the water to be filtered ejected from the water nozzle to be filtered hits the pleat outer peripheral surface of the pleated filter, and the cleaning effect of the pleated filter is obtained by the pressure. Unfiltered water and turbidity precipitated in the case 103 are sequentially discharged from the discharge flow path 108 in the case bottom 133. The characteristic of this apparatus is that the turbid component and the remaining filtered water are continuously discharged while being continuously discharged, and is characterized by 10 to 20 tons / hour or even 100 tons / hour required for ballast water. It is effective to secure the processing amount. In the figure, a valve or the like is not shown in the discharge channel 108, but equipment necessary for maintenance and flow rate adjustment can be provided. On the other hand, the water to be filtered that has been filtered by the pleated filter 101 is guided to the treated water flow path 107 through the water intake hole 141 provided in the central pipe 140 inside the filter and flows out of the case 103.

  The case 103 is provided with a chemical solution injection port 170 for a chemical solution in the lid portion 132. There may be substances that cannot be removed by mechanical cleaning but gradually accumulate on the filter surface. In order to extend the service life of the filter, it is desirable to use cleaning with a chemical solution in combination.

  As an example of an apparatus that performs processing at 100 tons / hour, an outer diameter of a pleat filter is 700 mm, an axial length is 320 mm, an effective area is height 280 mm, a pleat depth is 70 mm, and a pleat number is 420 folds. The filtered water nozzle 102 preferably has a rectangular nozzle opening 121.

  The ultraviolet irradiation apparatus for water treatment of the present application is used as the ultraviolet irradiation apparatus 12 in FIG. 11 for killing microorganisms in the water to be treated.

(UV irradiation device for water treatment in Fig. 1)
FIG. 1 is a view showing an example of an ultraviolet irradiation apparatus for water treatment, and is a view schematically showing a configuration of a vertical section. The cylindrical chamber 1 includes an ultraviolet lamp unit 2 inside. The ultraviolet lamp unit 2 is configured by accommodating an ultraviolet lamp 21 in an ultraviolet lamp protection tube 22. The ultraviolet lamp protective tube 22 is made of quartz glass or the like. The electrode wiring 23 of the ultraviolet lamp 21 is connected to an external power source.

  To-be-treated water (filtered water) that has flowed through the to-be-treated water flow path 5 flows inside the chamber 1 as shown by the arrows in FIG. The water to be treated flows along the ultraviolet lamp unit 2 inside the chamber 1. While flowing, the microorganisms in the for-treatment water are killed by the ultraviolet rays emitted from the ultraviolet lamp 21. The treated water that has been subjected to the ultraviolet irradiation treatment is discharged to the treated water flow path 6.

  When the ultraviolet lamp 21 breaks down or is exhausted, the ultraviolet lamp unit 2 is attached or detached at the openings at both ends of the chamber 1, that is, the attaching / detaching openings 10 of the ultraviolet lamp unit, in order to replace or repair the ultraviolet lamp 21. There is a need. The detachable opening 10 is sealed by the flange 4 so as to maintain watertightness when water to be treated is flowed.

In order to attach / detach the ultraviolet lamp unit 2 to / from the chamber 1, a space having a width greater than the length of the ultraviolet lamp unit 2, that is, an ultraviolet lamp replacement space 200 is required in the vicinity of the attaching / detaching opening 10 of the chamber 1. When an ultraviolet lamp unit having a length of 1 m is used, the width L _A1 of the ultraviolet lamp replacement space 200 is about 1 m.

Further, a space for attaching / detaching the flange 4 to / from the chamber 1 or repairing the electrode wiring of the ultraviolet lamp, that is, an attaching / detaching work space 202 is also required near the attaching / detaching opening 10 of the chamber 1. Width _{L B} of the detachable working space 202 is usually about 0.2M to 0.5M.

When the ultraviolet lamp unit 2 is attached and detached at the attachment / detachment opening 10 on the downstream side of the water to be treated in the chamber 1, the width L _A1 of the ultraviolet lamp replacement space 200 is required on the attachment / detachment opening 10 side on the downstream side of the treatment water. . On the other hand, in the upstream side of the detachable opening 10 side of the water to be treated of the chamber 1, it is required width L _B of the detachable working space 202. For attachment and detachment space of the detachable opening 10 side of the downstream side of the water to be treated 202, which is contained in the ultraviolet lamp replacement space 200, FIG. 1 is the width of the maintenance space for water treatment ultraviolet ray irradiation apparatus, an L _{A1 +} L _B .

Thus, length using an ultraviolet lamp unit of about 2m, when the width _{L B} of the detachable working space 202 and 0.4 m, width of the maintenance space is about 2.4 m. Also, if the length is using relatively short ultraviolet lamp units of about 0.6 m, the same way a 0.4m width L _B of the detachable work space 202, the width of the maintenance space is about 1 m.

(UV irradiation device for water treatment in Fig. 2)
FIG. 2 is a view showing an example of an ultraviolet irradiation apparatus for water treatment as an embodiment of the present invention, and schematically showing a configuration of a vertical section. Inside the cylindrical chamber 1, two ultraviolet lamp units 2 are arranged on the same axis. The ultraviolet lamp unit 2 is configured by accommodating an ultraviolet lamp 21 in an ultraviolet lamp protection tube 22. The ultraviolet lamp protective tube 22 is made of quartz glass or the like. The electrode wiring 23 of the ultraviolet lamp 21 is connected to an external power source.

  The treated water that has flowed through the treated water flow path 5 flows inside the chamber 1 as shown by the arrows in FIG. The water to be treated flows along the ultraviolet lamp unit 2 inside the chamber 1, and the microorganisms in the water to be treated are killed by the ultraviolet rays irradiated from the ultraviolet lamp 21 while flowing. The treated water that has been subjected to the ultraviolet irradiation treatment is discharged to the treated water flow path 6.

  The length of the chamber 1 is 2 m here. The length of the chamber 1 can be appropriately changed according to the specifications of the entire water treatment apparatus. The inner diameter of the chamber 1 is usually about 100 mm to 300 mm, but here it is 200 mm. The length and inner diameter of the chamber 1 can be appropriately changed according to the specifications of the water treatment ultraviolet irradiation device.

  FIG. 5 is a diagram schematically showing the configuration of the AA cross-sectional view in FIG. 2. The chamber 1 is cylindrical here, and the cross section is a circle. The shape of the chamber 1 may be a cylindrical shape such as a quadrangular prism, hexagonal prism, or octagonal prism.

  The ultraviolet lamp unit 2 is fixed by a flange 4 and is held near the central axis of the chamber. Here, the ultraviolet lamp 21 and the ultraviolet lamp protective tube 22 are cylindrical. Here, the length of the ultraviolet lamp 21 is 600 mm, the diameter of the lamp portion is 22 mm, the length of the ultraviolet lamp protective tube is 1 m, and the diameter is 30 mm.

  Here, the chamber 1 is not a single chamber, but it can be considered that the ends of the two cylindrical chambers are connected to each other at the dotted line aa in FIG. And the to-be-processed water flows continuously through the inside of the chamber, and each chamber can be regarded as having a structure having a detachable opening at the end where the chambers are not connected.

  Accordingly, the ultraviolet ray irradiation device for water treatment in FIG. 2 includes an ultraviolet lamp unit and a plurality of cylindrical chambers for irradiating ultraviolet rays to the water to be treated. At least one end of the lamp has a UV lamp unit attachment / detachment opening and is connected in series so that the water to be treated flows continuously through the chambers. The UV lamp unit is attached / detached by the attachment / detachment opening. It can be said that it is an ultraviolet irradiation device for water treatment that is configured to be possible. Moreover, in the water treatment ultraviolet irradiation device of FIG. 2, two chambers may be connected via a connecting pipe.

  The water treatment ultraviolet irradiation device of FIG. 2 is configured such that the water to be treated flows continuously in the chamber 1. Therefore, the total length of the space in which the water to be treated is irradiated with ultraviolet rays is equal to the total length of the ultraviolet lamp 21, and the water to be treated can be efficiently irradiated with ultraviolet rays. In addition, since the ultraviolet lamp units are arranged on the same axis, the water to be treated can be made to flow in the same direction in the two chambers. For this reason, the disturbance of the flow which arises by changing the direction of the flow of to-be-processed water can be suppressed.

  When the ultraviolet lamp 21 breaks down or wears out, the ultraviolet lamp unit 2 is attached to or detached from the openings at both ends of the chamber 1, that is, the attachment / detachment opening 10 of the ultraviolet lamp unit, in order to replace or repair the ultraviolet lamp 21. There is a need. The detachable opening 10 is sealed by the flange 4 so as to maintain watertightness when water to be treated is flowed.

  The water treatment ultraviolet irradiation apparatus of FIG. 2 also requires an ultraviolet lamp replacement space and an attachment / detachment work space in the vicinity of the attachment / detachment opening 10 of the chamber 1, similarly to the water treatment ultraviolet irradiation apparatus of FIG. 1. In the ultraviolet irradiation apparatus for water treatment in FIG. 2, an ultraviolet lamp replacement space is required in the vicinity of both ends of the chamber 1 because the ultraviolet lamp unit is attached and detached at both ends of the chamber 1.

The total length of the ultraviolet lamp of the water treatment ultraviolet irradiation device of FIG. 2 is the same as the total length of the ultraviolet lamp of the water treatment ultraviolet irradiation device of FIG. However, in FIG. 2, since there are two ultraviolet lamp units 2, the length per ultraviolet lamp unit in FIG. 2 is half the length per ultraviolet lamp unit in FIG. . Therefore, the width L _A2 of the ultraviolet lamp replacement space 201 in FIG. 2 is half of the width L _A1 of the ultraviolet lamp replacement space 200 in FIG. On the other hand, the width L _B of the detachable working space 202 is the same in water treatment ultraviolet irradiation apparatus for water treatment ultraviolet irradiation device and 2 in Figure 1.

FIG. 2 is a diagram schematically showing, as an example, the case of L _A2 > L _{B for} the ultraviolet lamp replacement space 201 and the attachment / detachment work space 202.

In the case of L _A2 ≧ L _B , the attachment / detachment work space 202 is included in the ultraviolet lamp replacement space 201, so the width of the maintenance space of the water treatment ultraviolet irradiation device in FIG. 2 is 2 × L _A2 . The width of the maintenance space for water treatment ultraviolet irradiation device of FIG. 1 is a _{L A1 + L B = 2 ×} L A2 + L B, greater than 2 × _{L A.}

For example, if L _B is 0.4 m and L _A1 is 2 m in the water treatment ultraviolet irradiation device of FIG. 1, L _A2 becomes 1 m by _adopting the configuration of the water treatment ultraviolet irradiation device of FIG. _(A2 ≧ L _B ). The width of the maintenance space is 2.4 m in the water treatment ultraviolet irradiation device of FIG. 1, whereas the width of the maintenance space is 2 m in the water treatment ultraviolet irradiation device of FIG. 2.

_Also, in the case of L A2 _{<L B,} since the ultraviolet lamp replacement space 201 is included in the attachment and detachment work space 202, the width of the maintenance space becomes 2 × _{L B.} In the present application, when the total length of the UV lamp is greater than the width of one of the detachable work space, that is directed to a case of _{L A1> L B, L A1} + L B> a 2 × _{L B.}

For example, if L _B is 0.4 m and L _A1 is 0.6 m in the water treatment ultraviolet irradiation apparatus of FIG. 1, L _A2 is 0.3 m by adopting the configuration of the water treatment ultraviolet irradiation apparatus of FIG. (L _A2 <L _B ). The width of the maintenance space is 1 m in the water treatment ultraviolet irradiation device of FIG. 1, whereas the width of the maintenance space is 0.6 m in the water treatment ultraviolet irradiation device of FIG.

  From the above, the maintenance space of the water treatment ultraviolet irradiation device of FIG. 2 is smaller than the maintenance space of the water treatment ultraviolet irradiation device of FIG. Therefore, the floor area of the maintenance space required for the water treatment ultraviolet irradiation device of FIG. 2 is smaller than the maintenance space floor area required for the water treatment ultraviolet irradiation device of FIG.

(UV irradiation device for water treatment in Fig. 3)
FIG. 3 is a view showing an example of an ultraviolet irradiation apparatus for water treatment as an embodiment of the present invention, and schematically showing a configuration of a vertical section. Here, the two cylindrical chambers 1 are connected in series by the connecting pipe 3 in order to continuously flow the water to be treated between the chambers 1. The two cylindrical chambers 1 are arranged in parallel with their cylindrical axes parallel.

  Each of the two cylindrical chambers 1 includes one ultraviolet lamp unit 2 therein. The cross-sectional shape and inner diameter of the chamber 1 and the configuration of the ultraviolet lamp unit 2 are the same as the cross-sectional shape and inner diameter of the chamber 1 and the configuration of the ultraviolet lamp unit 2 of the water treatment ultraviolet irradiation device of FIG. The length of the chamber 1 is 1 m here.

  The to-be-treated water that has flowed through the to-be-treated water flow path 5 flows in the chamber 1 and the connection pipe 3 as indicated by arrows in FIG. The water to be treated flows along the ultraviolet lamp unit 2 inside the chamber 1, and the microorganisms in the water to be treated are killed by the ultraviolet rays irradiated from the ultraviolet lamp 21 while flowing. The treated water that has been subjected to the ultraviolet irradiation treatment is discharged to the treated water flow path 6.

  At the both ends of each chamber 1, there are detachable openings 10 for the ultraviolet lamp unit. Similar to the water treatment ultraviolet irradiation device of FIGS. 1 and 2, the detachable opening 10 is sealed by the flange 4 so as to maintain watertightness when water to be treated is flowed.

  Further, since the two chambers 1 are arranged in parallel with their cylindrical axes in parallel, the ultraviolet lamp units 2 can be attached to and detached from the chamber 1 by moving them in parallel directions. When the two chambers 1 are arranged so as to intersect their cylindrical axes, the two ultraviolet lamp units 2 are attached and detached in the intersecting direction, and a space having a width larger than the diameter of the ultraviolet lamp unit 2 is required. Become. Therefore, since the two chambers 1 are arranged in parallel with their cylindrical axes parallel to each other, the ultraviolet lamp replacement space can be reduced.

  Further, the two chambers 1 are connected in series by the connecting pipe 3 so that the water to be treated flows continuously in the chamber 1. Therefore, the total length of the space where the water to be treated is subjected to the ultraviolet irradiation treatment is equal to the total length of the ultraviolet lamp 21, and the water to be treated can be efficiently irradiated with ultraviolet rays.

  The water treatment ultraviolet irradiation apparatus of FIG. 3 also requires an ultraviolet lamp replacement space and an attachment / detachment work space in the vicinity of the attachment / detachment opening 10 of the chamber 1, as in the water treatment ultraviolet irradiation apparatus of FIGS. 1 and 2.

  In the water treatment ultraviolet irradiation device of FIG. 3, there are a case where the ultraviolet lamp unit 2 is attached / detached through the attachment / detachment opening 10 in the reverse direction and a case where the ultraviolet lamp unit 2 is attached / detached through the attachment / detachment opening 10 in the same direction. The one with better workability can be selected in consideration of the arrangement status of the devices around the water treatment ultraviolet irradiation device.

  First, in the ultraviolet irradiation apparatus for water treatment in FIG. 3, when the ultraviolet lamp unit 2 is attached / detached in the reverse direction attaching / detaching opening 10 in the upstream chamber 1 and the downstream chamber 1 (here, the upstream chamber 1). (1) When the ultraviolet lamp unit 2 is attached to and detached from the upstream attachment / detachment opening 10 of the upstream side 1 and the attachment / detachment opening 10 upstream of the downstream chamber 1), what happens to the maintenance space will be described.

  In this case, an ultraviolet lamp replacement space is required both near the upstream attachment / detachment opening 10 of the upstream chamber 1 and near the attachment / detachment opening 10 downstream of the downstream chamber 1.

Here, the total length of the ultraviolet lamp of the water treatment ultraviolet irradiation device of FIG. 3 is the same as the total length of the ultraviolet lamp of the water treatment ultraviolet irradiation device of FIGS. However, since the number of the ultraviolet lamp units 2 in FIG. 3 is two, the length of each ultraviolet lamp unit in FIG. 1 is half. That is, the length per ultraviolet lamp unit in FIG. 3 is the same as the length per ultraviolet lamp unit in FIG. Therefore, the width L _A2 of the ultraviolet lamp replacement space 201 in FIG. 3 is half of the width L _A1 of the ultraviolet lamp replacement space 200 in FIG. The width L _B of the detachable working space 202 is the same as the width L _B of the detachable working space 202 of the water treatment ultraviolet irradiation device of FIG. 1 and FIG 2.

According to the same discussion as the water treatment ultraviolet irradiation device of FIG. 2, the width of the maintenance space of the water treatment ultraviolet irradiation device of FIG. 3 is 2 × L _A2 when L _A2 ≧ L _B , and L _A2 <L _B for becomes 2 × _{L B.} The width L _A2 of the ultraviolet lamp replacement space 201 of the water treatment ultraviolet irradiation device in FIG. 3 is half of the width L _A1 of the ultraviolet lamp replacement space 200 in FIG. On the other hand, the width of the maintenance space for water treatment ultraviolet irradiation device of FIG. 1 is a _{L A1 + L B = 2 ×} L A2 + L B. Therefore, the maintenance space of the water treatment ultraviolet irradiation device of FIG. 3 in this case is smaller than the maintenance space of the water treatment ultraviolet irradiation device of FIG.

FIG. 3 schematically shows, as an example, a case where the ultraviolet lamp unit 2 is attached to and detached from the attachment / detachment opening 10 in the reverse direction with respect to the ultraviolet lamp replacement space 201 and the attachment / detachment work space 202 and L _A2 > L _B. It is a figure.

For example, if L _B is 0.4 m and L _A1 is 2 m in the water treatment ultraviolet irradiation device of FIG. 1, L _A2 becomes 1 m by _adopting the configuration of the water treatment ultraviolet irradiation device of FIG. _(A2 ≧ L _B ). The width of the maintenance space is 2.4 m in the water treatment ultraviolet irradiation device of FIG. 1, whereas the width of the maintenance space is 2 m in the water treatment ultraviolet irradiation device of FIG. 3.

For example, if L _B is 0.4 m and L _A1 is 0.6 m in the water treatment ultraviolet irradiation apparatus of FIG. 1, L _A2 is 0 by _adopting the configuration of the water treatment ultraviolet irradiation apparatus of FIG. .3 m (when L _A2 <L _B ). The width of the maintenance space is 1 m in the water treatment ultraviolet irradiation device of FIG. 1, whereas the width of the maintenance space is 0.8 m in the water treatment ultraviolet irradiation device of FIG.

  Next, in the ultraviolet irradiation apparatus for water treatment in FIG. 3, when the ultraviolet lamp unit 2 is attached / detached in the attaching / detaching opening 10 in the same direction in the upstream chamber 1 and the downstream chamber 1 (here, on the upstream side A description will be given of the maintenance space for the attachment / detachment opening 10 on the upstream side of the chamber 1 and the attachment / detachment opening 10 on the downstream side of the downstream chamber 1).

  The difference from the case where the ultraviolet lamp unit 2 is attached / detached in the opposite direction attaching / detaching opening 10 between the upstream chamber 1 and the downstream chamber 1 is that an ultraviolet lamp replacement space is required on the one attaching / detaching opening 10 side. In addition, only the attaching / detaching work space is required on the other attaching / detaching opening 10 side.

According to the discussion similar to the above discussion, in the UV irradiation apparatus for water treatment in FIG. 3, the width of the maintenance space is L _A2 + L _B when L _A2 ≧ L _B , and the maintenance space when L _A2 <L _B. width is 2 × _{L B.} Since the width of the maintenance space for water treatment ultraviolet irradiation device of FIG. 1 is a _{L A1 + L B = 2 ×} L A2 + L B, maintenance space of water treatment ultraviolet irradiation device of FIG. 3 in this case, in FIG. 1 It becomes smaller than the maintenance space of the ultraviolet irradiation device for water treatment.

For example, if L _B is 0.4 m and L _A1 is 2 m in the water treatment ultraviolet irradiation device of FIG. 1, L _A2 becomes 1 m by _adopting the configuration of the water treatment ultraviolet irradiation device of FIG. _(A2 ≧ L _B ). The width of the maintenance space is 2.4 m in the water treatment ultraviolet irradiation device in FIG. 1, whereas the width of the maintenance space is 1.4 m in the water treatment ultraviolet irradiation device in FIG. 3.

For example, if L _B is 0.4 m and L _A1 is 0.6 m in the water treatment ultraviolet irradiation apparatus of FIG. 1, L _A2 is 0 by _adopting the configuration of the water treatment ultraviolet irradiation apparatus of FIG. .3 m (when L _A2 <L _B ). The width of the maintenance space is 1 m in the water treatment ultraviolet irradiation device of FIG. 1, whereas the width of the maintenance space is 0.8 m in the water treatment ultraviolet irradiation device of FIG.

  From the above, the maintenance space of the water treatment ultraviolet irradiation device of FIG. 3 is smaller than the maintenance space of the water treatment ultraviolet irradiation device of FIG. Therefore, the floor area of the maintenance space required for the water treatment ultraviolet irradiation device of FIG. 3 is smaller than the maintenance space floor area required for the water treatment ultraviolet irradiation device of FIG.

(UV irradiation device for water treatment in FIG. 4)
FIG. 4 is a view showing an example of an ultraviolet irradiation apparatus for water treatment as an embodiment of the present invention, and schematically showing a configuration of a vertical section. The water treatment ultraviolet irradiation device of FIG. 4 has the same configuration as the water treatment ultraviolet irradiation device of FIG. 3, but the water treatment ultraviolet irradiation device of FIG. 4 has the ultraviolet lamp unit 2 in the chamber 1 only in the same direction. 3 is different from the ultraviolet ray irradiation apparatus for water treatment in FIG. That is, in the ultraviolet irradiation apparatus for water treatment of FIG. 4, each chamber 1 is provided with a detachable opening 10 of an ultraviolet lamp unit on the same side. Specifically, there are detachable openings on the upstream side of the upstream chamber 1 and on the downstream side of the downstream chamber 1. As another arrangement of the detachable opening 10, the detachable opening 10 may be provided on the downstream side of the upstream chamber 1 and on the upstream side of the downstream chamber 1.

  Similar to the water treatment ultraviolet irradiation apparatus of FIGS. 1 to 3, the water treatment ultraviolet irradiation apparatus of FIG. 4 also requires an ultraviolet lamp replacement space and an attachment / detachment work space in the vicinity of the attachment / detachment opening 10.

The total length of the ultraviolet lamp of the water treatment ultraviolet irradiation device of FIG. 4 is the same as the length of the ultraviolet lamp of the water treatment ultraviolet irradiation device of FIGS. However, since there are two ultraviolet lamp units 2 in FIG. 3, the length per one ultraviolet lamp unit in FIG. 1 is about half. That is, the length per ultraviolet lamp unit in FIG. 4 is substantially the same as the length per ultraviolet lamp unit in FIGS. Therefore, the width L _A2 of the ultraviolet lamp replacement space 201 in FIG. 4 is about half of the width L _A1 of the ultraviolet lamp replacement space 200 in FIG. 1, and the width L _A2 of the ultraviolet lamp replacement space 201 in FIGS. It is almost the same. The width L _B of the detachable working space 202 is the same as the width L _B of the detachable working space 202 of the water treatment ultraviolet irradiation device of FIG. 1 and FIG 2.

Note that there is a UV lamp replacement space and a removable work space only on the same side of each chamber 1. Similar to the discussion on the maintenance space of the water treatment ultraviolet irradiation device in FIG. 3, in the case of L _A2 ≧ L _B in the water treatment ultraviolet irradiation device in FIG. 4, the width of the maintenance space is L _A2 , and L _A2 < the width of the maintenance space in the case of L _B becomes the _{L B.} Since the width of the maintenance space for water treatment ultraviolet irradiation device of FIG. 1 is a _{L A1 + L B ≒ 2 ×} L A2 + L B, maintenance space of water treatment ultraviolet irradiation device of FIG. 4 also, for water treatment in FIG. 1 It is smaller than the maintenance space of the UV irradiation device.

FIG. 4 is a diagram schematically showing, as an example, the case of L _A2 > L _{B for} the ultraviolet lamp replacement space 201 and the attachment / detachment work space 202.

For example, if L _B is 0.4 m and L _A1 is 2 m in the water treatment ultraviolet irradiation device of FIG. 1, L _A2 is about 1 m by _adopting the configuration of the water treatment ultraviolet irradiation device of FIG. L _A2 ≧ L _B ). The width of the maintenance space is 2.4 m in the water treatment ultraviolet irradiation device of FIG. 1, whereas the width of the maintenance space is about 1 m in the water treatment ultraviolet irradiation device of FIG. 4.

Further, for example, if L _B is 0.4 m and L _A1 is 0.6 m in the water treatment ultraviolet irradiation device of FIG. 1, L _A2 can be reduced by the configuration of the water treatment ultraviolet irradiation device of FIG. 0.3 m (in the case of L _A2 <L _B ). The width of the maintenance space is 1 m in the water treatment ultraviolet irradiation device of FIG. 1, whereas the width of the maintenance space is 0.4 m in the water treatment ultraviolet irradiation device of FIG.

  From the above, the maintenance space of the water treatment ultraviolet irradiation device of FIG. 4 is smaller than the maintenance space of the water treatment ultraviolet irradiation device of FIG. Therefore, the floor area of the maintenance space required for the water treatment ultraviolet irradiation device of FIG. 4 is smaller than the maintenance space floor area required for the water treatment ultraviolet irradiation device of FIG.

(When the installation / removal work space is extremely small)
A case where the width L _B of the attaching / detaching work space is extremely small (L _B ≈0 m) is also assumed, such as when the flange can be attached / detached by remote control. In this case, the width of the maintenance space of the water treatment ultraviolet irradiation device in FIG. 1 is _LA1 .

In the case of L _B ≈0 m, the maintenance space for attaching / detaching the ultraviolet lamp unit 2 in the attachment / detachment opening 10 in the same direction between the upstream chamber 1 and the downstream chamber 1 in the water treatment ultraviolet irradiation device of FIG. , And the maintenance space of the ultraviolet ray irradiation apparatus for water treatment in FIG. In this case, the width of the maintenance space is substantially equal to the ultraviolet lamp replacement space width _LA2 . The width of the maintenance space of the water treatment ultraviolet irradiation apparatus in FIG. 1 is L _A1 + L _B ≈L _A1 = 2 × L _A2 , so the maintenance space of any of the water treatment ultraviolet irradiation apparatuses is for water treatment in FIG. + About half of the maintenance space of the UV irradiation device. That is, even when L _B ≈0 m, the two apparatus configurations have an effect that the maintenance space is small.

(UV irradiation device for water treatment in FIG. 6: current plate)
FIG. 6 is a diagram showing an example of an ultraviolet irradiation device for water treatment as an embodiment of the present invention, and schematically showing a configuration including a rectifying plate inside a connecting pipe. A rectifying plate 7 is attached to the connecting pipe 3. The configuration of the water treatment ultraviolet irradiation device in FIG. 6 is the same as the configuration of the water treatment ultraviolet irradiation device in FIG. 3 except that a rectifying plate is provided. Similarly, the ultraviolet ray irradiation device for water treatment in FIG. 4 can be configured to include a rectifying plate inside the connecting pipe.

  FIG. 7 shows a schematic diagram of the configuration of the BB cross section in FIG. 6 of the rectifying plate 8 attached to the connecting pipe 3. The rectifying plate 7 has a disc shape along the shape inside the connecting pipe 3 and has a large number of through holes 9.

  In the ultraviolet irradiation apparatus for water treatment in FIG. 6, a plurality of chambers are arranged in parallel with their cylindrical axes in parallel, and are connected in series so that the water to be treated flows continuously in the chamber. Therefore, the inflow direction of the water to be treated into the chamber 1 from the connecting pipe 3 to the downstream side is orthogonal to the direction in which the water to be treated flows inside the chamber 1. In the configuration in which a plurality of chambers are connected in this way, the water to be treated flows fast in the downstream chamber 1 in the region opposite to the inlet, and the flow rate of the water to be treated decreases in the region on the inlet. There is a tendency. If there is a part where the flow rate of the water to be treated is small, the water to be treated may not be efficiently irradiated with ultraviolet rays. Moreover, there is a possibility that ultraviolet rays are not sufficiently irradiated to the water to be treated which has a fast flow. Therefore, it is desirable that the water to be treated flows as uniformly as possible inside the chamber.

  Therefore, if the flow straightening plate 7 is installed in the connection pipe 3 to regulate the flow of the water to be treated, the uneven flow rate of the water to be treated can be suppressed in the downstream chamber 1, and therefore the ultraviolet rays can be efficiently emitted. It can irradiate the water to be treated. Further, since the rectifying plate 7 is provided not in the chamber 1 but in the connecting pipe 3, ultraviolet rays emitted from the ultraviolet lamp 21 are not blocked by the rectifying plate 7 in the chamber 1, and the ultraviolet rays are efficiently used. Can be expected to be irradiated.

(UV treatment device for water treatment in FIGS. 8 and 9: current plate)
FIG. 8 and FIG. 9 are diagrams showing an example of an ultraviolet irradiation apparatus for water treatment as an embodiment of the present invention, and schematically showing a configuration including a rectifying plate inside a chamber. A rectifying plate 8 is attached to the chamber 1 of the water treatment ultraviolet irradiation device shown in FIGS. The configuration of the water treatment ultraviolet irradiation device of FIGS. 8 and 9 is the same as the configuration of the water treatment ultraviolet irradiation device of FIGS. 2 and 3 except that a rectifying plate is provided. Similarly, the ultraviolet ray irradiation apparatus for water treatment in FIG. 4 can be configured to include a rectifying plate inside the chamber.

  In the ultraviolet irradiation apparatus for water treatment in FIG. 8, the water to be treated flows into the chamber 1 from the water passage 5 to be treated. In the ultraviolet treatment apparatus for water treatment in FIG. 9, the water to be treated flows into the chamber 1 from the water flow path 5 and the connecting pipe 3. In both cases, the inflow direction and the flow direction inside the chamber 1 are orthogonal. In such a configuration, the water to be treated flows fast in the chamber 1 in a region opposite to the inlet, and the flow rate of the water to be treated tends to decrease in the region on the inlet. If there is a part where the flow rate of the water to be treated is small, the water to be treated may not be efficiently irradiated with ultraviolet rays. Moreover, there is a possibility that ultraviolet rays are not sufficiently irradiated to the water to be treated which has a fast flow. Therefore, it is desirable that the water to be treated flows as uniformly as possible inside the chamber.

  The rectifying plate is installed on the inlet side of the water to be treated in the chamber from the longitudinal center of the chamber 1. That is, the installation position of the current plate is on the upstream side of the chamber 1. This installation position makes the flow of water to be treated more uniform in a larger part of the chamber 1 than in the case where it is installed on the outlet side of the water to be treated of the chamber from the center in the longitudinal direction of the chamber 1. be able to. Of course, you may install a baffle plate near the center part of the chamber 1 in the longitudinal direction.

  The water treatment ultraviolet irradiation device of FIG. 8 can be regarded as the end portions of the two cylindrical chambers connected in series, similarly to the water treatment ultraviolet irradiation device of FIG. In this case, the flow of the water to be treated may be disturbed due to the discontinuity in a portion corresponding to the connecting portion, that is, in the vicinity where the two ultraviolet lamp units 2 face each other. That is, since a plurality of chambers are connected, the flow of water to be treated inside the chamber may be uneven. Therefore, the flow of water to be treated can be made uniform by providing a current plate inside the chamber. In this case, it is effective to provide a current plate on the downstream side of the portion corresponding to the connecting portion.

  FIG. 10 is a schematic diagram of the configuration of the CC cross section in FIGS. 8 and 9 of the rectifying plate 8 attached to the chamber 1. The rectifying plate 8 has a disk shape along the shape inside the chamber 1, and has a large number of through-holes 9 like the rectifying plate 7. The rectifying plate 8 is different from the rectifying plate 7 in that the central portion has a hole through which the ultraviolet lamp unit 2 passes. The flow straightening plate 8 can regulate the flow of the water to be treated flowing through the chamber 1 and suppress the deviation of the flow rate of the water to be treated. Therefore, it can be expected that the water to be treated can be more effectively irradiated with ultraviolet rays.

(Rectifying plate arrangement method)
The water treatment ultraviolet irradiation device of FIG. 6 has a configuration in which the rectifying plate 7 is provided only in the connection pipe 3. Further, the water treatment ultraviolet irradiation device of FIGS. 8 and 9 has a configuration in which the rectifying plate 7 is provided only in the chamber 1. However, the arrangement of the current plate is not limited to these. For example, it is possible to provide a rectifying plate in both the connecting pipe and the chamber, to provide a rectifying plate only in a specific chamber, or to provide one or a plurality of rectifying plates in each chamber. Further, in the case of a configuration in which the chamber is provided with a rectifying plate, it is preferable to arrange the rectifying plate on the upstream side of the chamber, but the rectifying plate may be provided on the central portion of the chamber or on the downstream side.

(Cleaning mechanism)
Although not shown in FIGS. 2 to 4, 6, 8, and 9, a cleaning mechanism that cleans the ultraviolet lamp protection tube 22 can be further provided. If the surface of the UV lamp protection tube is periodically cleaned by the cleaning mechanism, it is possible to prevent the UV irradiation amount from decreasing. Therefore, an increase in power consumption can be suppressed even when the operation is performed in the UV irradiation constant mode. As the cleaning mechanism, for example, a resin ring contacting the surface of the UV lamp protection tube can be reciprocated using a motor or the like along the longitudinal direction of the UV lamp protection tube.

  When both the current plate and the cleaning mechanism are provided inside the chamber, it is necessary to have a configuration in which the position of the current plate is not shifted by the operation of the cleaning mechanism and a configuration in which the current plate is not damaged. For example, the resin ring of the cleaning mechanism operates so as not to contact the rectifying plate only in the larger space among the spaces partitioning the chamber by the rectifying plate, or a hole through which the cleaning mechanism passes is provided in the rectifying plate. The configuration of can be considered.

  Moreover, although the number of cleaning steps increases when there are a plurality of chambers, it is possible to efficiently clean even when there are a plurality of chambers by providing a cleaning mechanism.

(Number of UV lamp units in the chamber)
3, 4, 6 and 9, one ultraviolet lamp unit 2 is provided inside each chamber 1. 2 and FIG. 8 also includes one ultraviolet lamp unit inside one chamber, assuming that the ends of the two chambers are connected in series. . However, the number of ultraviolet lamp units housed in each chamber is not limited to one, and two or more ultraviolet lamp units can be arranged in parallel. If the number of ultraviolet lamp units is increased and arranged in parallel, the amount of ultraviolet irradiation in each chamber can be increased accordingly.

  However, when a plurality of ultraviolet lamp units are arranged in parallel in one chamber, the inner diameter of the chamber is often larger than when only one ultraviolet lamp unit is installed. In some cases, the intensity of the light is weakened. If there is a region where the intensity of ultraviolet rays is weak in the chamber, the efficiency of the killing treatment of the microorganisms in the ballast water by the ultraviolet irradiation is deteriorated. Therefore, a configuration in which only one ultraviolet lamp unit is provided in one chamber is preferable.

  Further, the configuration in which only one ultraviolet lamp unit is provided in one chamber is a particularly preferable configuration in the case where a cleaning mechanism for cleaning the ultraviolet lamp protection tube is provided. If a single chamber is equipped with multiple UV lamp units, the distance between the UV lamp units should be set to prevent damage to the UV lamp protection tube and to ensure that the cleaning mechanism operates smoothly. It is required to attach the ultraviolet lamp unit with high accuracy and to produce the cleaning part of the cleaning mechanism with high dimensional accuracy. Therefore, if only one UV lamp unit is provided in one chamber, the UV lamp unit mounting accuracy and the dimensional accuracy of the cleaning part of the cleaning mechanism are not required to be so high, and the UV lamp unit mounting is complicated. Can be reduced and the cost of the cleaning mechanism can be reduced.

(Chamber length and UV lamp unit length)
In each of the water treatment ultraviolet irradiation devices of FIGS. 3, 4, 6 and 9, the length of each chamber 1 is the same, and the length of each ultraviolet lamp unit 2 is also the same. Further, in each of the water treatment ultraviolet irradiation devices of FIGS. 2 and 8, the lengths of the chambers 1 are the same as long as the ends of the two chambers are connected in series. The length of the lamp unit 2 is also the same. However, in each water treatment ultraviolet irradiation device, the lengths of the chambers can be different, and the lengths of the ultraviolet lamp units can be different.

The ultraviolet lamp unit 2 is attached / detached at the attachment / detachment opening 10 in the same direction in the upstream chamber 1 and the downstream chamber 1 of the water treatment ultraviolet irradiation device of FIG. 4 and the water treatment ultraviolet irradiation device of FIGS. 3 and 9. In this case, it is preferable to make all the lengths of the ultraviolet lamp units 2 equal in each water treatment ultraviolet irradiation device. This is because, when L _A2 ≧ L _B , it is possible to make the ultraviolet lamp replacement space smaller by making the length of the ultraviolet lamp unit 2 the same than when making the length of the ultraviolet lamp unit 2 different.

(Number of chambers)
In the ultraviolet irradiation apparatus for water treatment shown in FIGS. 3, 4, 6 and 9, there are two chambers. However, the number of chambers is not limited to two and may be three or more. When the total length of the ultraviolet lamp is made constant, if the number of chambers is increased, the length of the ultraviolet lamp unit is reduced and the width of the ultraviolet lamp replacement space is reduced. Therefore, the maintenance space can be reduced by increasing the number of chambers until the width of all the ultraviolet lamp replacement spaces becomes smaller than the width of the attaching / detaching work space.

  On the other hand, when the number of chambers increases, in the water treatment ultraviolet irradiation apparatus of FIGS. 3, 4, 6 and 9, the number of connecting pipes connecting the chambers increases and the apparatus becomes complicated. Further, as the number of chambers increases, the number of times of exchanging the ultraviolet lamp increases. The replacement of one ultraviolet lamp takes about 5 to 10 minutes, and when the number of replacement operations increases, the time required to replace all the ultraviolet lamps of the water treatment ultraviolet irradiation device becomes longer. Therefore, the number of chambers is preferably 5 or less in consideration of a balance between reducing the maintenance space and suppressing complication of the apparatus and complications such as ultraviolet lamp replacement. In particular, when importance is attached to the suppression of complication of the apparatus and the suppression of complications such as ultraviolet lamp replacement, the number of chambers is more preferably two or three. In order to minimize the complexity of the apparatus and complications such as replacement of the ultraviolet lamp and to reduce the maintenance space, two chambers are preferably used.

  If the width of all UV lamp replacement spaces is smaller than the width of the removable work space, the width of the maintenance space is determined by the width of the removable work space. The space will not get smaller.

(Ballast water treatment equipment)
The water treatment ultraviolet irradiation device of FIGS. 2 to 4, 6, 8, and 9 has a small maintenance space, so that the ballast water treatment device including these can efficiently use the space at the installation location. When the ballast water treatment device including the water treatment ultraviolet irradiation device of FIGS. 2 to 4, 6, 8, and 9 is installed in a ship, for example, the ballast including the water treatment ultraviolet irradiation device of FIG. The space in the ship can be used more efficiently than the water treatment device. Therefore, the ballast water treatment apparatus provided with the ultraviolet irradiation apparatus for water treatment described in the present application can efficiently use the space in the ship.

  Since the ultraviolet irradiation device for water treatment of the present invention has a small maintenance space, when using brackish water and seawater such as seawater desalination and ballast water, or when treating sewage, domestic wastewater, industrial wastewater, etc. It can be suitably used as a killing treatment apparatus.

DESCRIPTION OF SYMBOLS 1 Chamber 2 Ultraviolet lamp unit 21 Ultraviolet lamp 22 Ultraviolet lamp protection tube 23 Electrode wiring 3 Connection pipe 4 Flange 5 Water flow path 6 Processed water flow path 7 and 8 Current plate 9 Through-hole 10 Removable opening part 11 Filtration apparatus 12 Ultraviolet irradiation apparatus 13 Tanks 31, 32, 33, 34, 35, 36 Piping 41 Pump 101 Pleated filter 102 Filtered water nozzle 103 Case 106 Filtered water channel 107 Processed water channel 108 Discharge channel 121 Nozzle port 131 Outer cylinder part 132 Cover part 133 Bottom 140 Central piping 141 Water intake hole 170 Chemical solution inlet 190 Motor 191 Motor cover 200, 201 UV lamp replacement space 202 Detachable work space

Claims (9)

An ultraviolet lamp unit, and a plurality of cylindrical chambers for irradiating the water to be treated with ultraviolet rays inside the ultraviolet lamp unit;
The chamber has a detachable opening of the ultraviolet lamp unit at at least one of its cylindrical ends, and is connected in series so that the water to be treated flows continuously through the plurality of chambers.
The ultraviolet lamp unit for water treatment is configured such that the ultraviolet lamp unit is detachable through the detachable opening. Including two chambers and two ultraviolet lamp units;
The one end of the chamber has the removable opening, and the chambers are connected at the other end,
The said ultraviolet lamp unit is an ultraviolet irradiation device for water treatment according to claim 1 arranged on the same axis. A connecting pipe for flowing the water to be treated between the chambers;
The said chamber is the ultraviolet irradiation device for water treatment of Claim 1 arrange | positioned in parallel with the cylindrical axis | shaft parallel. The chamber has the detachable opening only at one end.
The ultraviolet irradiation device for water treatment according to claim 3, wherein the detachable opening is opened in the same direction.   The ultraviolet irradiation device for water treatment according to claim 3 or 4, further comprising a rectifying plate inside the connecting pipe.   The ultraviolet irradiation device for water treatment according to any one of claims 1 to 5, further comprising a current plate inside the chamber.   The ultraviolet irradiation apparatus for water treatment according to any one of claims 1 to 6, further comprising a cleaning mechanism for cleaning the ultraviolet lamp unit.   The one said chamber is equipped with the one said ultraviolet lamp unit, The ultraviolet irradiation device for water treatment of any one of Claim 1-7.   A ballast water treatment device comprising the ultraviolet ray irradiation device for water treatment according to any one of claims 1 to 8.

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