JP6036369B2 - Ballast water treatment equipment - Google Patents

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 that departs 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 describes a ballast water treatment apparatus using a filtration membrane. The ballast water treatment apparatus of Patent Document 1 includes an ultraviolet lamp that irradiates filtered water with ultraviolet rays, and microorganisms can be killed by the ultraviolet lamp.

Japanese Patent No. 4835785

  The ultraviolet lamp is housed in an ultraviolet lamp protection tube, and is installed in a chamber that performs ultraviolet treatment of ballast water as an ultraviolet lamp unit. However, in order to replace or repair the ultraviolet lamp, it is necessary to take out the ultraviolet lamp unit from the chamber. The UV lamp unit used for the process of killing ballast water may be about 2 m long, and in order to take out from the chamber, a space with a width of 2 m or more from the outlet of the chamber, that is, a maintenance space is required. . Since the ballast water treatment device is installed in the ship, it is desirable to make the maintenance space as small as possible in order to use the space in the ship efficiently.

  Then, an object of this invention is to provide the ultraviolet irradiation apparatus for water treatment which can make a maintenance space small, and a ballast water treatment apparatus using the same.

  The invention of the present application 1 includes: (1) an ultraviolet lamp unit including an ultraviolet lamp and an ultraviolet lamp protection tube; and a plurality of cylindrical lamps for internally irradiating water to be treated with at least one ultraviolet lamp unit. A chamber and a connecting pipe for allowing the water to be treated to flow between the chambers, the chambers being arranged in parallel with the cylindrical axis in parallel, and the inside of the chamber being treated by the connecting pipe Is an ultraviolet irradiation device for water treatment, which is connected in series so as to continuously flow.

  In the ultraviolet irradiation apparatus for water treatment of the present invention, the water to be treated flows along the longitudinal direction of the ultraviolet lamp inside the chamber. Therefore, the water to be treated is subjected to ultraviolet 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 treatment can be performed on the water to be treated. On the other hand, in order to replace or repair the ultraviolet lamp, it is necessary to take out the ultraviolet lamp unit from the chamber, and a space for taking out the ultraviolet lamp unit, that is, a maintenance space is required. Therefore, the longer the ultraviolet lamp unit, the larger the maintenance space.

  However, by configuring the water treatment ultraviolet irradiation device as described above, the length per ultraviolet lamp unit can be shortened even if the total length of the ultraviolet lamp is the same. For example, if there are two chambers, the length per UV lamp unit can be about half that of a single chamber. In addition, since the chambers are arranged in parallel with their cylindrical axes in parallel, it is possible to take out the UV lamp unit from the chamber in the same direction, and the UV lamp units in each chamber intersect to maintain a maintenance space. It does not spread. Furthermore, since the water to be treated is connected in series by the connecting pipe so that the water to be treated flows continuously in the chamber, the total length of the space in which the water to be treated is treated with ultraviolet rays can be the same as in the case of one chamber. it can.

  From the above, by configuring the water treatment ultraviolet irradiation device as described above, the maintenance space can be reduced while the ultraviolet treatment capability is the same.

  (2) It is desirable to further provide a current plate inside the connecting pipe. The current plate is a plate for adjusting the flow of fluid.

  To-be-treated water flows into the chamber from the to-be-treated water flow path or the connecting pipe, but in the above configuration, the inflow direction and the flow direction inside the chamber are different. When the inflow direction and the flow direction inside the chamber are different, the water to be treated flows quickly and biased to a region on the opposite side of the inlet in the chamber, and the flow rate of the water to be treated tends to decrease in the region on the inlet side. If there is a portion where the flow rate of the water to be treated is small, the ultraviolet treatment is not efficiently performed, and there is a possibility that the portion where the flow is fast is not sufficiently ultraviolet treated. Therefore, it is desirable that the water to be treated flows as uniformly as possible inside the chamber.

  Regarding the flow of water to be treated from the connecting pipe to the chamber, if the flow of the water to be treated is arranged by installing a rectifying plate in the connecting pipe, the flow rate of the water to be treated can be suppressed in the downstream chamber. Therefore, the ultraviolet treatment can be performed efficiently. In addition, since the rectifying plate is provided inside the connecting tube, 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 irradiated. Can be expected.

  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.

  (3) A current plate can be further provided inside the chamber. By providing a current plate inside the chamber, the flow of water inside the chamber can be adjusted. In this configuration, if a rectifying plate is also provided inside the chamber into which the water to be treated flows from the water channel to be treated, the flow of the water to be treated inside the chamber 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.

  (4) It is desirable to further include a cleaning mechanism for cleaning the ultraviolet lamp protective tube. 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 a cleaning mechanism for cleaning the ultraviolet lamp protection tube is provided and the surface of the ultraviolet lamp protection tube is periodically cleaned, it is possible to prevent a decrease in the amount of ultraviolet irradiation. For this reason, an increase in power consumption can be suppressed even when the operation is performed in the UV irradiation constant mode.

  (5) Moreover, it is desirable to provide only one ultraviolet lamp unit in one chamber. When two or more UV lamp units are installed 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 the UV light is weakened in the chamber. This is because there 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.

  (6) The above-described ultraviolet irradiation device for water treatment can be suitably used for a ballast water treatment device. The ballast water treatment apparatus of this invention is a ballast water treatment apparatus provided with the above-mentioned ultraviolet irradiation apparatus for water treatment. Since the ultraviolet irradiation apparatus for water treatment of the present invention has a small maintenance space, even when a ballast water treatment apparatus equipped with the apparatus is installed in a ship, the space in the ship can be used efficiently.

  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.

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 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. 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 typically the structure of CC cross section of the baffle plate in 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. 8 typically.

  Configuration examples of an ultraviolet irradiation device for water treatment and a ballast water treatment device according to the present invention will be described below with reference to the 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 treatment device, and accompanying piping. This system processes seawater taken from a pipe 31 by a pump 41 and stores it in a tank 14 as ballast water. Seawater as filtered water sent to the filtration device 12 via the pipe 32 is filtered by the filtration device 12. The filtered water to be filtered is sent to the microorganism killing means such as the ultraviolet irradiation device 13 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 13. Further, the discharged water that has not been filtered in the filtering device 12 is led out of the device through the pipe 35. Seawater that has undergone the microbe killing process is sent to the tank 14 via the pipe 34 and the pipe 36.

  A specific configuration example of the filtration device will be described with reference to FIGS. 8 and 9. 8 and 9 illustrate a part of a marine ballast water treatment apparatus. FIG. 8 is a diagram schematically showing a configuration of a vertical section including an axis, and FIG. 9 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.

(UV irradiation equipment for water treatment)
The ultraviolet irradiation apparatus for water treatment of the present invention is used as the ultraviolet irradiation apparatus 13 in FIG. 7 for killing microorganisms in the water to be treated.

  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. To-be-treated water (filtered water) that has flowed through the to-be-treated water flow path 6 flows inside the chamber 1 as shown by 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 water to be treated are killed by the ultraviolet rays irradiated from the ultraviolet lamp 21.

Since the ultraviolet lamp 21 is a consumable item, it is necessary to take out the ultraviolet lamp unit 2 from the chamber in order to perform replacement or repair. In order to take out the ultraviolet lamp unit 2 from the chamber 1, a space having a width larger than the length of the ultraviolet lamp unit 2 from the outlet of the chamber 1, that is, a maintenance space 7 is required. When the length of the ultraviolet lamp unit normally used for the ballast water killing process is about 2 m, for example, the width L ₁ of the maintenance space 7 is about 2 m or more.

  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. Here, the two cylindrical chambers 1 are connected in series by a connecting pipe 3 in order to 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 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 two cylindrical chambers 1 accommodate therein an ultraviolet lamp unit 2 and are sealed by a flange 4 so as to maintain water tightness. 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 6 flows through the inside of the chamber 1 and the inside of the connecting pipe 3 as shown by arrows in FIG. The water to be treated flows along the ultraviolet lamp unit 2 inside the chamber 1, and while flowing, the microorganisms in the water to be treated are killed by the ultraviolet rays irradiated from the ultraviolet lamp 21. The treated water subjected to the ultraviolet treatment is discharged to the treated water flow path 5.

  When the ultraviolet lamp 21 fails or is consumed, the ultraviolet lamp unit 2 is removed from the chamber 1 in order to replace or repair the ultraviolet lamp 21. Therefore, a space for extracting the ultraviolet lamp unit 2, that is, a maintenance space 7 is necessary. As the ultraviolet lamp 21 becomes longer, that is, as the ultraviolet lamp unit 2 becomes longer, the maintenance space becomes larger.

The total length of the ultraviolet lamp of the water treatment ultraviolet irradiation device of FIG. 2 is the same as the 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 one ultraviolet lamp unit in FIG. 2 is about half of the length per one ultraviolet lamp unit in FIG. Yes. Therefore, the width L ₂ of the maintenance space 7 in FIG. 2 may be about half the width L ₁ of the maintenance space 7 in FIG. That is, the floor area of the maintenance space required for the water treatment ultraviolet irradiation device of FIG. 2 may be about half that of the water treatment ultraviolet irradiation device of FIG.

  Also, since the two chambers 1 are arranged in parallel with their cylindrical axes parallel, the ultraviolet lamp unit 2 can be taken out from the chamber 1 in the same direction. When the two chambers 1 are arranged so as to intersect their cylindrical axes, the two ultraviolet lamp units 2 are taken out in the intersecting direction, and a space having a width equal to or larger than the diameter of the ultraviolet lamp unit 2 is required. . Therefore, the maintenance space can be reduced by arranging the two chambers 1 in parallel with their cylindrical axes parallel.

  Furthermore, since the two chambers 1 are connected in series by the connecting pipe 3 so that the water to be treated flows continuously inside the chamber 1, the total length of the space in which the water to be treated is treated with ultraviolet rays is It becomes equal to the total length of the lamp 21. Therefore, the water to be treated can be efficiently UV-treated.

  FIG. 3 is a diagram schematically illustrating 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 length of the chamber 1 is 1 m here. The length of the chamber 1 can be appropriately changed according to the specifications of the entire water treatment apparatus, and may be 1 m or more or 1 m or less. The inner diameter of the chamber 1 is usually about 100 mm to 300 mm in accordance with the specifications of the water treatment ultraviolet irradiation apparatus, but here it is 200 mm.

  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.

(rectifier)
FIG. 4 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 rectifying plate 8 is attached to the connecting pipe 3, and a rectifying plate 9 is attached to each of the two chambers 1. The configuration of the water treatment ultraviolet irradiation device in FIG. 4 is the same as the configuration in FIG. 2 except that a rectifying plate is provided.

  FIG. 5 shows a schematic diagram of the configuration of the BB cross section in FIG. 4 of the rectifying plate 8 attached to the connecting pipe 3. The rectifying plate 8 has a disk shape along the shape inside the connecting pipe 3 and has a large number of through holes 10.

  To-be-treated water flows into the chamber 1 from the to-be-treated water flow path 6 or the connecting pipe 3, but in FIG. In such a configuration, the water to be treated flows faster in the chamber 1 toward the region on the side opposite to the inlet, and the flow rate of the water to be treated tends to decrease in the region on the inlet side. If there is a portion where the flow rate of the water to be treated is small, the ultraviolet treatment is not efficiently performed, and there is a possibility that the portion where the flow is fast is not sufficiently ultraviolet treated. Therefore, it is desirable that the water to be treated flows as uniformly as possible inside the chamber 1.

  Regarding the flow of the water to be treated from the connecting pipe 3 to the chamber 1, the flow rate of the water to be treated in the downstream chamber 1 can be adjusted by installing a rectifying plate 8 in the connecting pipe 3 and adjusting the flow of the water to be treated. The bias can be suppressed, and therefore the ultraviolet treatment can be performed efficiently. Further, since the rectifying plate 8 is provided not in the chamber 1 but in the connecting pipe 3, the ultraviolet rays emitted from the ultraviolet lamp 21 are not blocked by the rectifying plate 8 in the chamber 1, and the ultraviolet rays are not generated. It can be expected to be irradiated efficiently.

  FIG. 6 shows a schematic diagram of the configuration of the CC cross section in FIG. 4 of the rectifying plate 9 attached to the chamber 1. The rectifying plate 9 attached to the other chamber 1 has the same configuration. The position of the rectifying plate is set closer to the inlet of the water to be treated in the chamber than the central portion in the longitudinal direction of the chamber 1. The rectifying plate 9 has a disc shape along the shape inside the chamber 1, and has a large number of through-holes 10, like the rectifying plate 8. The rectifying plate 9 is different from the rectifying plate 8 in that the ultraviolet lamp unit 2 penetrates through the central portion. This flow regulating plate 9 can regulate the flow of the water to be treated flowing through the chamber 1, can suppress the deviation of the flow rate of the water to be treated, and can be expected to perform the ultraviolet treatment more effectively. In this configuration, if a rectifying plate is also provided inside the chamber 1 into which the water to be treated flows from the water channel to be treated, the flow of the water to be treated inside the chamber 1 can be adjusted.

  In FIG. 4, the rectifying plate 8 or the rectifying plate 9 is provided in all of the plurality of chambers 1 and the connecting pipes 3. However, the installation method of the rectifying plate is not limited to this, the rectifying plate is provided only in the connection pipe, the rectifying plate is provided only in a plurality of chambers, the rectifying plate is provided only in one chamber, and the multitude in each chamber. It is also possible to provide a current plate.

(Cleaning mechanism)
Although not shown in FIGS. 2 and 4, a cleaning mechanism for cleaning 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.

(Number of chambers)
In the water treatment ultraviolet irradiation apparatus shown in FIGS. 2 and 4, 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, the maintenance space can be reduced as the number of chambers increases. On the other hand, when the number of chambers increases, the number of connecting pipes connecting the chambers increases and the apparatus becomes complicated. When the ultraviolet lamp is replaced, the number of times of taking out from the chamber and storing it again increases. It takes about 5 to 10 minutes to replace the ultraviolet lamps, and if the number of replacements increases, the time required to replace all the ultraviolet lamps in the water treatment ultraviolet irradiation device becomes longer. Therefore, it is preferable to reduce the number of chambers to five or less in consideration of the balance between reducing the maintenance space and the complexity of the apparatus and the suppression of complications such as ultraviolet lamp replacement. In particular, when importance is attached to the complexity 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 equipment and complications such as UV lamp replacement and to reduce the maintenance space, two chambers can be used as in the configuration examples shown in FIGS. Good.

(Length of chamber and UV lamp unit)
The lengths of the plurality of chambers can be made different, and the lengths of the plurality of ultraviolet lamp units can be made different. However, in the ultraviolet ray irradiation apparatus for water treatment shown in FIGS. 2 and 4, the lengths of the chamber and the ultraviolet lamp unit are all equal. This is because, when the length of the ultraviolet lamp unit is the same, the maintenance space can be made smaller than when the length is different.

(Number of UV lamp units in the chamber)
In the ultraviolet ray irradiation apparatus for water treatment shown in FIGS. 2 and 4, one ultraviolet lamp unit 2 is provided in each chamber 1. However, the number of ultraviolet lamp units housed in each chamber is not limited to one, and may be two or more. If the number of UV lamp units is increased, the efficiency of UV processing in each chamber can be increased accordingly. However, when a single chamber is provided with a plurality of UV lamp units, the UV lamp protection tube is prevented from being damaged, and the cleaning mechanism operates smoothly so that the UV lamp protection unit operates smoothly. It is required to attach the ultraviolet lamp unit by controlling the interval with high accuracy and to produce the cleaning portion 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.

(Ballast water treatment equipment)
Since the ultraviolet irradiation apparatus for water treatment of the present invention has a small maintenance space, the ballast water treatment apparatus provided with the apparatus can efficiently use the space at the installation location. Therefore, when this ballast water treatment apparatus is installed in a ship, for example, the space in the ship can be used efficiently. For example, when installing the ballast water treatment apparatus provided with the ultraviolet irradiation apparatus for water treatment of FIG. 2 in the ship, it is necessary as compared with the case of installing the ballast water treatment apparatus provided with the ultraviolet irradiation apparatus for water treatment of FIG. The floor space required for maintenance space is about half. Therefore, the ballast water treatment apparatus including the water treatment ultraviolet irradiation apparatus of FIG. 2 can use the space in the ship more efficiently than the ballast water treatment apparatus including the water treatment ultraviolet irradiation apparatus of FIG.

  Since the ultraviolet irradiation apparatus for water treatment of the present invention has a small maintenance space, it can be suitably used as a killing apparatus for microorganisms such as brackish water / seawater such as seawater desalination and ballast water, sewage, domestic wastewater, and industrial wastewater.

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 Processed water flow path 6 To-be-processed water flow path 7 Maintenance space 8, 9 Current plate 10 Through-hole 12 Filtration apparatus 13 Ultraviolet irradiation apparatus 14 Tank 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 tube part 132 Cover part 133 Bottom 140 Central piping 141 Water intake hole 170 Chemical solution inlet 190 Motor 191 Motor cover

Claims (5)

A ballast water treatment device mounted on a ship,
The ballast water treatment device includes an ultraviolet irradiation device for water treatment,
The ultraviolet ray irradiation device for water treatment is
An ultraviolet lamp unit including an ultraviolet lamp and an ultraviolet lamp protection tube, a plurality of cylindrical chambers provided with at least one ultraviolet lamp unit therein for irradiating ultraviolet rays to water to be treated, and the treatment target between the chambers A connecting pipe for flowing water,
The chambers are arranged in parallel so that their cylindrical axes are parallel, and are connected in series by the connection pipe so that the water to be treated flows continuously in the chamber,
When replacing the ultraviolet lamp unit,
UV width in the direction pulling out the ultraviolet lamp unit of the maintenance space is a space for pulling out the ultraviolet lamp unit from the chamber is longer than the length of the ultraviolet lamp unit, a total length of a plurality of the ultraviolet lamp unit Shorter than the width obtained by dividing the width of the maintenance space required for pulling out the lamp unit by the plurality of numbers ,
Ballast water treatment equipment.   The ballast water treatment apparatus according to claim 1, further comprising a current plate inside the connection pipe.   The ballast water treatment apparatus according to claim 1, further comprising a current plate inside the chamber.   The ballast water treatment apparatus according to any one of claims 1 to 3, further comprising a cleaning mechanism for cleaning the ultraviolet lamp protection tube.   The ballast water treatment apparatus according to claim 1, wherein one chamber includes one ultraviolet lamp unit.

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