JP2013043143A - Ballast water treatment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a cleaning brush clean to effectively clean an ultraviolet irradiation apparatus in a ballast water treatment system including the ultraviolet irradiation apparatus.SOLUTION: The ballast water treatment system for removing and killing organisms and microorganisms in ballast water includes the ultraviolet irradiation apparatus 7. The ultraviolet irradiation apparatus 7 includes: ultraviolet lamps 17; protection tubes 18 each for liquid-tightly storing the ultraviolet lamp 17; a case 16 in which the ultraviolet lamps 17 respectively stored in the protection tubes 18 are arranged; and protection tube cleaning materials 27 each moving along the protection tube 18 while being brought into contact with the outer surface of the protection tube 18. A photocatalyst is applied to each protection tube cleaning material 27.

Description

  The present invention relates to a ballast water treatment apparatus that removes and kills organisms and microorganisms in ballast water, and more particularly to a ballast water treatment apparatus provided with an ultraviolet irradiation device.

  When a ship is unloaded or has less load, water (seawater, fresh water or brackish water) called ballast water is taken into the ship to sink the propeller to the desired depth or to lower the ship's center of gravity to the proper level. . Typically, when a ship unloads a cargo at a loading port, the center of gravity rises, so that the surrounding water is taken in and lowered, and the ballast water is discharged to the surroundings at the loading port.

  However, since the ballast water taken in at the unloading port is discharged at the loading port, there is a problem that the surrounding ecosystem is destroyed due to organisms and microorganisms contained in the ballast water. Therefore, a ballast water treatment apparatus that removes and kills organisms and microorganisms in the ballast water is known. For example, an ultraviolet irradiation apparatus is used as the ballast water treatment apparatus.

  In the UV irradiation device, an ultraviolet lamp housed in a protective tube in a liquid-tight manner is provided in the hollow case, and the liquid passing through the case is irradiated with UV light to kill organisms and microorganisms in the liquid. It is a device to do.

  In this ultraviolet irradiation device, if dirt is attached to the protective tube of the ultraviolet lamp with use, the amount of ultraviolet irradiation to the liquid may be reduced, and the intended killing effect may not be obtained. In addition, the inner surface of the case is buffed in order to obtain a killing effect due to the reflection of ultraviolet rays. There is a risk that it will not be effective.

  Therefore, as disclosed in the following patent documents, it has been proposed to clean the protective tube of the ultraviolet lamp and the inner surface of the case with a brush.

Japanese Utility Model Publication No. 49-129341 Japanese Patent Laid-Open No. 9-168780

  However, in the prior art, when dirt adheres to the cleaning brush itself, it cannot be eliminated and efficient and reliable cleaning cannot be performed. Therefore, the problem to be solved by the present invention is to provide a ballast equipped with an ultraviolet irradiation device that can keep the cleaning brush clean and preferably prevent the adhesion of dirt in order to clean more effectively. It is to provide a water treatment device.

  The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 is a ballast water treatment apparatus that removes and kills organisms and microorganisms in ballast water, and includes an ultraviolet irradiation device. The ultraviolet irradiation device includes an ultraviolet lamp, a protective tube for storing the ultraviolet lamp in a liquid-tight manner, a case in which the ultraviolet lamp accommodated in the protective tube is disposed, and an outer surface of the protective tube. A ballast water treatment apparatus comprising: a protective tube cleaning material that moves along the protective tube, wherein the protective tube cleaning material is coated with a photocatalyst.

  According to invention of Claim 1, the protective tube which accommodates an ultraviolet lamp can be cleaned with a protective tube cleaning material. In addition, since the photocatalyst is applied to the protective tube cleaning material, even if the protective tube cleaning material is contaminated, the photocatalyst self-activates by being irradiated with ultraviolet rays during cleaning or when stopped (when not being cleaned). With the cleaning function, the protective tube cleaning material is kept clean, and the protective tube can be reliably removed.

  The invention according to claim 2 further includes a case cleaning material that moves along the protective tube together with the protective tube cleaning material while being in contact with the inner surface of the case, and a photocatalyst is applied to the case cleaning material. The ballast water treatment apparatus according to claim 1, wherein the ballast water treatment apparatus is a ballast water treatment apparatus.

  According to invention of Claim 2, the case inner surface of an ultraviolet irradiation device can be cleaned with a case cleaning material. In addition, since the photocatalyst is applied to the case cleaning material, even if the case cleaning material is contaminated, the photocatalyst is self-cleaning function by receiving UV irradiation during cleaning or when stopped (when not cleaning). The case cleaning material is kept clean, and the dirt on the inner surface of the case can be surely removed.

  The invention according to claim 3 is the ballast water treatment apparatus according to claim 1 or 2, wherein the cleaning material is moved and cleaned in a state where the ultraviolet lamp is energized.

  According to invention of Claim 3, it can clean, applying the ultraviolet-ray from an ultraviolet lamp to the photocatalyst of the said cleaning material. Thereby, it can clean efficiently, keeping a cleaning material clean with the self-cleaning function of a photocatalyst.

  According to a fourth aspect of the present invention, a slide plate through which the protective tube passes is provided in the case so as to be able to reciprocate along the protective tube, and the slide plate penetrates the protective tube. The protective tube cleaning material is provided at the portion, and the outer peripheral portion is provided with a case cleaning material that contacts the inner surface of the case. The protective tube cleaning material and the case cleaning material are each formed of a brush, and the protection The ballast water treatment device according to claim 3, wherein a photocatalyst is applied to at least a brush constituting the protective tube cleaning material among the tube cleaning material and the case cleaning material.

  According to the fourth aspect of the present invention, since the brush-shaped cleaning material is provided on the protection tube penetrating portion and the outer peripheral portion of the slide plate, and the photocatalyst is applied to at least the protection tube cleaning material, dirt adheres to the protection tube cleaning material. Even if the ultraviolet ray is irradiated, the protective tube cleaning material is kept clean by the self-cleaning function of the photocatalyst, and the protective tube can be reliably removed.

  The invention according to claim 5 is characterized in that the case cleaning material is provided so as to be irradiated with ultraviolet rays from the ultraviolet lamp, and a photocatalyst is also applied to a brush constituting the case cleaning material. The ballast water treatment apparatus according to claim 4.

  According to the invention described in claim 5, since the brush-like cleaning material is provided on the protection tube penetrating portion and the outer periphery of the slide plate, and the photocatalyst is applied to both the protection tube cleaning material and the case cleaning material, each cleaning material Even if dirt is attached, the cleaning material is kept clean by the self-cleaning function of the photocatalyst by being irradiated with ultraviolet rays during cleaning or when stopped (when not cleaning). Can be removed reliably.

  The invention according to claim 6 is characterized in that an antifouling paint or a paint containing a photocatalyst is applied to the inner surface of the case. It is a ballast water treatment apparatus of description.

  According to the sixth aspect of the invention, by applying an antifouling paint or the like to the inner surface of the case, it is possible to prevent adhesion of dirt to the inner surface of the case. Moreover, the killing effect in the vicinity of the wall surface can be improved by applying a paint containing a photocatalyst.

  Furthermore, the invention according to claim 7 is characterized in that the cleaning material is cleaned immediately before the killing process of the organism / microorganism by the ultraviolet irradiation device. This is a ballast water treatment device.

  According to the seventh aspect of the present invention, it is possible to reliably irradiate the ballast water with ultraviolet rays by cleaning immediately before the killing process of the organism / microorganism by the ultraviolet irradiation device.

  According to the present invention, in the ballast water treatment apparatus provided with the ultraviolet irradiation device, the cleaning brush for the ultraviolet irradiation device can be kept clean, so that the ultraviolet irradiation device can be more effectively cleaned. Further, if an antifouling paint or a photocatalyst-containing paint is applied to the inner surface of the case of the ultraviolet irradiation device, it is possible to prevent adhesion of dirt to the ultraviolet irradiation device.

It is the schematic which shows one Example of the ballast water treatment apparatus of this invention. It is a schematic perspective view which shows an example of the ultraviolet irradiation device used for the ballast water treatment apparatus of FIG. It is the III-III sectional view in FIG. It is IV-IV sectional drawing in FIG. FIG. 5 is a partially enlarged view of FIG. 4. It is a perspective view which cuts and shows a part of FIG.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view showing an embodiment of the ballast water treatment apparatus 1 of the present invention.

  The ballast water treatment apparatus 1 of this embodiment includes a pump 4, a water supply valve 5, a filter 6, an ultraviolet irradiation device 7, a flow rate sensor 8, and a tank inlet valve 9 in this order in a water supply path 3 from the outside of the ship to the ballast tank 2. . Further, a return path 10 to the upstream side of the pump 4 is also connected to the ballast tank 2, and a tank outlet valve 11 is provided in the return path 10.

  Further, a bypass passage 12 is provided in the water supply passage 3 so as to connect the downstream side of the pump 4 and the upstream side of the ultraviolet irradiation device 7, and a bypass valve 13 is provided in the bypass passage 12. ing. Further, a drainage channel 14 to the outside of the ship is provided in the water supply channel 3 upstream of the tank inlet valve 9, and a drainage valve 15 is provided in the drainage channel 14.

  Outboard water (seawater, fresh water or brackish water) is supplied to the ballast tank 2 through the water supply channel 3 and stored as ballast water. The filter 6 provided in the water supply channel 3 captures impurities contained in the ballast water by passing the ballast water. Thereby, in the filter 6, it is possible to remove organisms and microorganisms in the ballast water. The ultraviolet irradiation device 7 kills organisms and microorganisms in the ballast water with ultraviolet rays.

  The flow rate sensor 8 monitors the flow rate of ballast water that passes through the ultraviolet irradiation device 7 during operation of the ultraviolet irradiation device 7. If this flow rate is higher than a predetermined value, the ultraviolet irradiation device 7 may not perform the intended killing process. If the flow rate is lower than the predetermined value, the ultraviolet irradiation device 7 may be overheated. It is.

  2 to 6 are schematic views showing an example of an ultraviolet irradiation device 7 used in the ballast water treatment device 1 of the present embodiment, FIG. 2 is a perspective view, and FIG. 3 is a sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2, FIG. 5 is a partially enlarged view of FIG. 4, and FIG. 6 is a perspective view showing a part of FIG.

  The ultraviolet irradiation device 7 is a device through which ballast water is passed and irradiates the ballast water with ultraviolet rays to kill organisms and microorganisms in the ballast water. The ultraviolet irradiation device 7 is provided with one or a plurality of ultraviolet lamps 17 in a case 16 through which ballast water is passed. Each ultraviolet lamp 17 is housed in a liquid-tight manner in a protective tube (quartz glass tube) 18. Yes.

  In this embodiment, the case 16 includes a main body case 19 through which ballast water is passed, and left and right cover cases 20, 20 provided in the middle of the main body case 19 via flanges 19a (19b) and 20a (20b). It consists of. In the present embodiment, the main body case 19 is formed of a cylindrical body having a substantially rectangular cross section, and pipes of the water supply passage 3 are connected to both ends in the axial direction via flanges 19c (19d) and 3a (3b).

  As shown in FIG. 4, the protective tube 18 that contains the ultraviolet lamp 17 in a liquid-tight manner is bridged and held between the left and right side plates 23 and 24. The side plates 23 and 24 are liquid-tightly held on the left and right flanges 19 a and 19 b of the main body case 19. As described above, the cover cases 20 and 20 are provided on the left and right flanges 19 a and 19 b of the main body case 19 via the side plates 23 and 24.

  A portion of the main body case 19 sandwiched between the left and right side plates 23 and 24 is referred to as a main body portion 25. The main body 25 has a cylindrical shape with its axis lined in the left-right direction, and its cross section is not particularly limited, but in the present embodiment, it has a substantially rectangular shape.

  The number and arrangement of the protective tubes 18 (ultraviolet lamps 17) are appropriately set according to the treatment capacity of the ballast water. In the illustrated example, as shown in FIG. Arranged in a staggered pattern.

  Between the left and right side plates 23, 24, a slide plate 26 through which the protective tube 18 is penetrated is provided so as to be movable to the left and right. When the main body portion 25 of the main body case 19 is viewed in a cross section perpendicular to the horizontal axis (that is, in the state of FIG. 3), the slide plate 26 is formed in a shape corresponding to the cross-sectional shape of the main body portion 25. In this embodiment, it is formed from a substantially rectangular plate material that is slightly smaller than the main body portion 25.

  The slide plate 26 is provided with a protective tube cleaning material 27 at a portion through which the protective tube 18 penetrates, while a case cleaning material 28 is provided at the outer peripheral portion. That is, through holes are formed in the slide plate 26 in the same arrangement as that of the ultraviolet lamps so that the protective tubes 18 pass, and an annular protective tube cleaning material 27 is arranged in the through holes in the center direction of the through holes. The protective tube 18 is passed through the hole of the annular protective tube cleaning material 27. A case cleaning material 28 is provided on the outer periphery of the slide plate 26. Furthermore, an appropriate opening (not shown) is formed in the slide plate 26 so that the slide plate 26 can be moved to the left and right with water in the case 16.

  The protective tube cleaning material 27 and the case cleaning material 28 may be scrapers or the like, but are formed from brushes (for example, brushes made of stainless steel wire) in this embodiment. Specifically, as shown in FIG. 6, the protective tube cleaning material 27 is provided with an inward brush on an annular attachment material 29 provided in the through hole (through portion of the protective tube 18) of the slide plate 26. The hair 30 is provided. Further, as shown in FIGS. 3 and 5, the case cleaning material 28 is formed by providing outward bristles 32 on an annular attachment material 31 provided so as to surround the outer peripheral portion of the slide plate 26.

  As the slide plate 26 moves, the protective tube cleaning material 27 moves while contacting the outer surface of the protective tube 18, and the case cleaning material 28 moves while contacting the inner surface of the main body 25 of the case 16.

  Of the protective tube cleaning material 27 and the case cleaning material 28, a photocatalyst (specifically, for example, titanium oxide) is applied to at least the protective tube cleaning material 27. Preferably, a photocatalyst is applied to the brush bristles 30 and 32 of both the protective tube cleaning material 27 and the case cleaning material 28. This photocatalyst gives the brush hairs 30 and 32 a self-cleaning function by the ultraviolet rays from the ultraviolet lamp 17.

  By the way, the protective tube cleaning material 27 is provided so as to surround the protective tube 18 in the circumferential direction in a part of the protective tube 18 in the longitudinal direction of the ultraviolet lamp 17. Therefore, when the ultraviolet lamp 17 is energized, the protective tube cleaning material 27 is always exposed to ultraviolet rays from the ultraviolet lamp 17. On the other hand, since the case cleaning material 28 is provided on the outer peripheral portion of the slide plate 26, the ultraviolet rays from the ultraviolet lamp 17 are not always applied. Therefore, when the photocatalyst is applied also to the case cleaning material 28, it is preferable that the case cleaning material 28 is provided so as to be irradiated with ultraviolet rays from the ultraviolet lamp 17. For example, as shown in FIG. 5, the brush bristles 32 of the case cleaning material 28 are preferably provided so as to extend outward in the left-right direction from the plate surface of the slide plate 26.

  In this embodiment, the slide plate 26 is moved by the screw rod 33 in the left-right direction. Specifically, a screw rod 33 is rotatably spanned between the side plates 23 and 24, and a screw provided in the center of the slide plate 26 is screwed to the screw rod 33, so that the slide plate 26 is engaged. Can advance and retreat. One end of the screw rod 33 is connected to a motor 35 via a coupling 34, and the screw rod 33 can be rotated forward or reverse by the motor 35. Therefore, the slide plate 26 can be slid along the protective tube 18 by rotating the screw rod 33 by the motor 35.

  In order to move the slide plate 26 to the left and right stably, a plurality of guide shafts 36 are provided between the side plates 23 and 24. The guide shaft 36 is provided at a diagonal position, a vertically symmetric position, a left-right symmetric position, or four corners when the cross section of the main body 25 is rectangular, and a radial distance when the cross section of the main body 25 is circular. And the circumference is equally divided. However, if the number of guide shafts 36 increases too much, a shadow of ultraviolet rays is produced. Therefore, it is necessary to appropriately set the arrangement of the ultraviolet lamps so as to suppress the deterioration of the ultraviolet irradiation effect as much as possible.

  Of the plurality of guide shafts 36, one guide shaft 36 is a slide shaft 37 that moves left and right together with the slide plate 26. As shown in FIG. 4, the slide shaft 37 penetrates the left and right side plates 23 and 24 in a liquid-tight manner, and a central portion in the longitudinal direction is fixed to the slide plate 26. In addition, protrusions 38 and 39 are provided at both left and right ends of the slide shaft 37, respectively.

  When the slide plate 26 moves to the left end between the left and right side plates 23, 24, the right protrusion 39 of the slide shaft 37 operates the limit switch 40 of the right side plate 24, and the slide plate 26 is at the left end. Can be detected. Conversely, when the slide plate 26 moves to the right end between the left and right side plates 23, 24, the left protrusion 38 of the slide shaft 37 operates the limit switch 41 of the left side plate 23, and the slide plate 26 moves to the right end. Can be detected. During the killing process of the organisms and microorganisms in the ballast water, it is preferable that the slide plate 26 is disposed and stored at one end (left end or right end) between the left and right side plates 23 and 24. Thereby, since the ultraviolet rays from the ultraviolet lamp 17 are not blocked by the slide plate 26 (that is, the slide plate 26 cannot shadow the ultraviolet light), there is no possibility that the killing effect is lowered. In addition, if the position of the slide plate 26 is determined, even if the power is unexpectedly turned off, the power is turned on again by moving to one end between the left and right side plates 23 and 24 and stopping. In this case, the position of the slide plate 26 can be easily detected.

  By the way, the inner surface of the case 16 (particularly, the inner surface of the main body 25 between the left and right side plates 23, 24) is coated with an anti-fouling paint having ultraviolet transparency or a paint containing a photocatalyst (for example, a photocatalyst is mixed). It is preferable to apply the above-mentioned antifouling paint. The antifouling paint is not particularly limited. For example, a superhydrophilic silica-based coating solution manufactured by KRI (Advanced Materials Research Department) can be used. By applying such a paint to the inner surface of the case 16, it is possible to prevent the dirt from adhering to the inner surface of the case 16. Moreover, the washing | cleaning effect in the wall surface vicinity can be improved by apply | coating the coating material which added the photocatalyst.

  Next, operation | movement of the ballast water treatment apparatus 1 of a present Example is demonstrated. First, the ballast water supply / drainage process and the like will be described, and then the cleaning process of the protective tube 18 and the like will be described.

(1) Water supply to the ballast tank 2 When ballast water is pumped from the outside of the ship and supplied to the ballast tank 2, contaminants in the ballast water are removed by the filter 6, and organisms and microorganisms in the ballast water are removed by the ultraviolet irradiation device 7. Kill with ultraviolet rays. However, even if the ultraviolet irradiation device 7 is energized to the ultraviolet lamp 17, it takes a certain amount of time until it reaches a predetermined illuminance for use in the killing process. Until then, the pumped water is transferred to the ballast tank 2. It drains through the drainage channel 14 without supplying.

  That is, prior to the start of water supply to the ballast tank 2, first, the tank inlet valve 9, the tank outlet valve 11 and the bypass valve 13 are closed, while the water supply valve 5 and the drain valve 15 are opened, and the pump 4 and the ultraviolet irradiation device. 7 is activated. Thus, the pumped water is discarded from the drainage channel 14 until the ultraviolet lamp 17 reaches a predetermined illuminance.

  When the UV illuminance sensor (not shown) provided in the UV irradiation device 7 increases the UV illuminance to a predetermined level, the drain valve 15 is closed while the tank inlet valve 9 is opened. Thereby, the ballast water after killing organisms and microorganisms can be supplied to the ballast tank 2 and stored by the ultraviolet irradiation device 7.

(2) Drainage from the ballast tank 2 Even if the sterilization of organisms and microorganisms in the ballast water has already been carried out at the time of water supply to the ballast tank 2, even when draining from the ballast tank 2, It is preferable to carry out killing treatment of organisms and microorganisms in the ballast water.

  That is, the pump 4 and the ultraviolet irradiation device 7 may be operated while the water supply valve 5 and the tank inlet valve 9 are closed while the tank outlet valve 11, the bypass valve 13 and the drain valve 15 are opened. Thus, the ballast water in the ballast tank 2 is passed through the ultraviolet irradiation device 7 via the return path 10 and the bypass path 12 and then discharged out of the ship via the drainage path 14. After energizing the ultraviolet lamp 17, the tank inlet valve 9 is opened and the drain valve 15 is closed until the ultraviolet lamp 17 reaches a predetermined illuminance, so that the ballast between the ballast tank 2 and the ultraviolet irradiation device 7 is closed. Water may be circulated.

(3) Cleaning of the protective tube 18 and the case 16 Cleaning of the outer surface of the protective tube 18 with the protective tube cleaning material 27 and cleaning of the inner surface of the case 16 with the case cleaning material 28 are performed by reciprocating the slide plate 26 appropriately by controlling the motor 35. It is done by moving.

  Cleaning can be performed before or after supplying water to the ballast tank 2, or before or after draining from the ballast tank 2. In particular, it is preferably performed immediately before the organism / microbe killing process by the ultraviolet irradiation device 7. For example, prior to the water supply to the ballast tank 2, after the ultraviolet lamp 17 is energized as described above, cleaning is started when the ultraviolet lamp 17 reaches a predetermined illuminance. Alternatively, cleaning can be performed after the ultraviolet lamp 17 is energized until the ultraviolet lamp 17 reaches a predetermined illuminance, or before and after the time when the ultraviolet lamp 17 reaches the predetermined illuminance. In any case, it is desirable to perform cleaning after the photocatalyst applied to the surface of the cleaning material has an illuminance that can exhibit a self-cleaning function by irradiation with ultraviolet rays. By removing dirt such as the protective tube 18 before the killing process, it is possible to appropriately secure the illuminance of ultraviolet rays and reliably kill the organisms and microorganisms in the ballast water.

  Cleaning may be performed in a state where the ultraviolet lamp 17 is not energized, or may be performed in a state where the ultraviolet lamp 17 is energized. When cleaning is performed in a state where the ultraviolet lamp 17 is not energized, iron, sand, hardness, etc. adhering to the surface to be cleaned are removed by physical contact with the cleaning materials 27 and 28. After cleaning without energizing the ultraviolet lamp 17, when the ultraviolet lamp 17 is turned on for ballast water treatment, the photocatalyst applied to the cleaning materials 27 and 28 is activated, so the cleaning materials 27 and 28 are cleaned. Can be kept in. On the other hand, when cleaning is performed with the ultraviolet lamp 17 energized, the photocatalyst applied to the cleaning materials 27, 28 is irradiated with ultraviolet rays even if dirt is attached to the cleaning materials 27, 28. The cleaning materials 27 and 28 are kept clean by the cleaning function, so that comfortable cleaning can always be performed. In this way, oil and ionic substances attached to the surface to be cleaned can be removed. By cleaning the protective tube 18, it is possible to prevent a decrease in ultraviolet illuminance. Further, by cleaning the inner surface of the case 16, the ultraviolet reflection effect can be maintained.

  The ballast water treatment apparatus 1 of the present invention is not limited to the configuration of the above embodiment, and can be changed as appropriate. For example, in the embodiment, the main body 25 of the case 16 has a substantially rectangular cross section, but the cross sectional shape is not particularly limited, and may be, for example, a circular cross section.

  Moreover, in the said Example, although the photocatalyst was apply | coated to both the protective tube cleaning material 27 and the case cleaning material 28, application | coating of the photocatalyst to the case cleaning material 28 may be abbreviate | omitted depending on the case. Moreover, in the said Example, although the protective tube cleaning material 27 and the case cleaning material 28 were provided in the slide plate 26, installation of the case cleaning material 28 may be abbreviate | omitted by the case.

  Furthermore, the ballast water treatment device 1 may further include an electrolysis device. This electrolysis apparatus is an apparatus that generates hypochlorous acid by the salt contained in the pumped seawater when water is supplied to the ballast tank 2, thereby killing organisms and microorganisms in the ballast water.

DESCRIPTION OF SYMBOLS 1 Ballast water treatment apparatus 7 Ultraviolet irradiation apparatus 16 Case 17 Ultraviolet lamp 18 Protection tube 26 Slide plate 27 Protection tube cleaning material 28 Case cleaning material 30 Brush hair (of protection tube cleaning material) 32 Brush hair (of case cleaning material)

Claims (7)

A ballast water treatment device that removes and kills organisms and microorganisms in ballast water,
It is equipped with an ultraviolet irradiation device.
With UV lamp,
A protective tube for liquid-tightly storing the ultraviolet lamp;
A case where the ultraviolet lamp housed in the protective tube is disposed;
A protective tube cleaning material that moves along the protective tube while contacting the outer surface of the protective tube;
The ballast water treatment apparatus, wherein the protective tube cleaning material is coated with a photocatalyst. A case cleaning material that moves along the protective tube together with the protective tube cleaning material while contacting the inner surface of the case;
The ballast water treatment device according to claim 1, wherein a photocatalyst is also applied to the case cleaning material. The ballast water treatment apparatus according to claim 1 or 2, wherein the cleaning material is moved and cleaned while the ultraviolet lamp is energized. In the case, a slide plate through which the protective tube passes is provided so as to reciprocate along the protective tube,
In the slide plate, the protective tube cleaning material is provided in the penetrating portion of the protective tube, while the outer peripheral portion is provided with a case cleaning material that contacts the inner surface of the case,
The protective tube cleaning material and the case cleaning material are each formed from a brush,
The ballast water treatment device according to claim 3, wherein a photocatalyst is applied to at least a brush constituting the protective tube cleaning material among the protective tube cleaning material and the case cleaning material. The case cleaning material is provided to receive irradiation of ultraviolet rays from the ultraviolet lamp,
The ballast water treatment device according to claim 4, wherein a photocatalyst is also applied to the brush constituting the case cleaning material. The ballast water treatment apparatus according to any one of claims 1 to 5, wherein an antifouling paint or a paint containing a photocatalyst is applied to the inner surface of the case. The ballast water treatment device according to any one of claims 1 to 6, wherein the cleaning material is cleaned immediately before the killing process of the organism / microorganism by the ultraviolet irradiation device.

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