JP6459608B2 - Ballast water treatment equipment - Google Patents

Description

  The present invention relates to a ballast water treatment apparatus provided with a cylindrical filter that filters ballast water that has flowed inside and flows it out.

  In a ship such as a tanker, when navigating to the destination again after unloading the crude oil, etc., the ballast water is generally placed in the ballast tank provided in the ship in order to balance the navigating ship. It stores water called. Ballast water is basically taken at the loading port and discharged at the loading port. Therefore, if they are different, plankton and bacterial microorganisms contained in the ballast water will move around the world. Therefore, if ballast water is discharged from a loading port in a sea area different from the cargo port, microorganisms in another sea area will be released to that port, which may destroy the ecosystem in that sea area.

  In order to reduce the content of microorganisms contained in ballast water, a ballast water treatment apparatus including a filter for filtering ballast water is used. Since the filter of the ballast water treatment apparatus requires a high level of microorganism removal performance, a filter body made of a fine mesh screen or the like is required. For this reason, clogging is severe and constant filter cleaning is important.

  Conventionally, as a means for removing foreign matter accumulated on the inner surface of a filter, Patent Document 1 discloses a suction nozzle that opens at a position facing the filter inner surface, and the suction nozzle along the filter inner surface along the axial direction and circumference of the filter. The nozzle moving means for moving both in the direction, the backwash nozzle that is disposed outside the filter and that faces the suction nozzle, and discharges the backwash water, and the backwash nozzle is synchronized with the suction nozzle. There is described a filtration device comprising backwash nozzle moving means for moving in the direction.

JP 2004-141785 A

  Since clean water is valuable in ships, ballast water (filtered water) filtered by a filter may be used as backwash water for the filter. However, even if it is filtered water, the cleanliness of backwash water may be insufficient. It is also conceivable to separately provide a cartridge type filter and pre-filter the backwash water with the cartridge type filter. However, in this case, the filter cartridge needs to be replaced, and the maintainability is not excellent.

  The present invention provides a ballast water treatment apparatus that can improve the cleanliness of backwash water with high maintainability in a ballast water treatment apparatus that includes a cylindrical filter that filters ballast water that has flowed inside and flows out to the outside. For the purpose.

The present invention is a cylindrical filter for filtering the ballast water that has flowed into the interior and flowing it out,
A backwash water injection nozzle that is provided on the secondary side of the filter and injects backwash water toward the filter; a backwash water distribution line through which the backwash water circulates toward the backwash water injection nozzle; A regenerative filter that is provided in the backwash water distribution line and filters backwash water flowing through the backwash water distribution line, and filtered water that has been filtered by the filter and that does not pass through a ballast tank The present invention relates to a ballast water treatment device comprising: backwash water supply means for supplying treated water or filtered treated water stored in a ballast tank to the backwash water injection nozzle as backwash water .

In addition, the present invention provides a cylindrical filter that filters the ballast water that has flowed into the primary side and flows it out to the secondary side, and is provided on the secondary side of the filter and injects backwash water toward the filter. Backwashing water injection nozzle, backwashing water distribution line through which backwashing water flows toward the backwashing water injection nozzle, and backwashing provided in the backwashing water distribution line and circulating through the backwashing water distribution line The present invention relates to a ballast water treatment apparatus , comprising: a regenerative filter for filtering water, wherein ballast water stored in a ballast tank is used as reclaimed water for regenerating the regenerative filter.

  Further, the apparatus further comprises a clean water tank for storing clean water, and after the ballast water stored in the ballast tank is used as regeneration water, the clean water stored in the clean water tank is supplied to the regenerative filter. It is preferably used as reclaimed rinsing water for regenerative rinsing.

  According to the ballast water treatment device of the present invention, in the ballast water treatment device including a cylindrical filter that filters the ballast water flowing into the inside and flows out to the outside, the cleanliness of the backwash water can be improved with high maintainability. A ballast water treatment device can be provided.

It is a flowchart which shows one Embodiment of the ballast water treatment apparatus of this invention.

An embodiment of the ballast water treatment apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a flowchart showing an embodiment of the ballast water treatment apparatus of the present invention.
As shown in FIG. 1, the ballast water treatment apparatus 1 of this embodiment includes a ballast water filtration device 2, ultraviolet reactor 61, and Kiyoshi water tank 63, a regenerative filter 70, a backwash water supply means 7 And a control unit (not shown).

This embodiment forms state as a line, the treated water inlet line L1, the treatment water discharge line L2, the treated water line L11, a reservoir treated water discharge line L12, and backwash water distribution lines L21, reproduction water line L24, clean water line L25, regeneration drainage line L26, and air vent line L31 are provided. “Line” is a general term for lines capable of flowing fluid such as flow paths, paths, and pipelines.

  The ballast water filtration device 2 includes a casing 51, a filter 52, a filter rotating means 3, a suction nozzle 4, a backwash water injection nozzle 6, a wash sewage discharge means 5, and a differential pressure detection means 8. .

  The casing 51 has a cylindrical shape and houses the filter 52 therein. The filter 52 has a cylindrical shape, filters the water to be treated (ballast water) W1 (mainly seawater) flowing into the inside, and causes the water to flow out as ballast water (filtered water) W2. The filter rotating means 3 rotates the filter 52 around its axis. The suction nozzle 4 is provided on the primary side of the filter 52 and opens toward the inner peripheral surface of the filter 52.

  The backwash water jet nozzle 6 is provided on the secondary side of the filter 52 and jets backwash water toward the outer peripheral surface of the filter 52 during the ballast water treatment operation. The backwash water is water filtered by the regenerative filter 70. The backwash water injection from the backwash water injection nozzle 6 is performed in a state where the ballast water (W2, W1) is present (filled) inside the casing 51 and the filter 52.

The cleaning sewage discharging means 5 discharges the cleaning sewage W11 sucked by the suction nozzle 4 from the inside of the casing 51 to the outside. The differential pressure detection means 8 detects the differential pressure between the primary side and the secondary side of the filter 52. The control unit controls the presence / absence of the backwashing water W2 injection, the injection pressure at the time of backwashing water W2 injection, and the like based on the differential pressure detected by the differential pressure detection means 8 and the like.
Details of the ballast water filtration device 2 will be described later.

The ultraviolet reactor 61 irradiates the ballast water (filtered water) W2 filtered by the filter 52 of the ballast water filtration device 2 with ultraviolet rays.
The ballast tank 62 stores ballast water (filtered water) W2 that has been irradiated with ultraviolet rays by the ultraviolet reactor 61 as stored treated water W3.
Further, the ultraviolet reactor 61 supplies the stored treated water W3 to the stored treated water W3 when discharging the ballast water (stored treated water) W3 stored in the ballast tank 62 to the outside of the ship or as the reclaimed filter 70 as the reclaimed water W3. Irradiation with ultraviolet rays is performed.

  The clean water tank 63 stores clean water (recycled rinsing water) W4 prepared separately from the ballast water.

  The regenerative filter 70 is a regenerative filter and filters backwash water flowing through the backwash water distribution line L21. The regenerative filter 70 in the present embodiment is a sand filter type filter. Note that a regenerative filter other than the sand filter, such as a fiber filter, may be used.

  The regenerative filter 70 can be backwashed with water for regeneration (reserved treated water) W3 introduced through the backwashing water distribution line L21 to regenerate the filtration capacity. The recycled wastewater W3 is discharged to the outside through the recycled wastewater line L26. Further, the regenerative filter 70 can be rinsed at the time of regeneration by the regenerative rinsing water W4 introduced through the backwash water distribution line L21. The rinsing waste water W4 is discharged to the outside through the regeneration drain line L26.

  In the present embodiment, the ballast water (stored treated water) W3 stored in the ballast tank 62 is used as regeneration water for regenerating the regeneration filter 70. In addition, after the stored treated water W3 is used as the regeneration water, the clean water W4 stored in the clean water tank 63 is used as the regeneration rinsing water for the regeneration rinsing of the regeneration filter 70.

Next, each line will be described in detail. The treated water introduction line L1 is introduced with treated water W1 (mainly seawater) from one end and is connected to the treated water inlet 20 at the other end, and the treated water W1 is the ballast water filtration device 2. This is a line that circulates toward the treated water inlet 20. A pumping pump P1, a valve V1, a connection portion J1, and a treated water introduction port 20 are connected to the treated water introduction line L1 in this order.
The treated water discharge line L2 is connected to the connection portion J1 of the treated water introduction line L1 at one end, and is a line through which water (ballast water W1) in the filter 52 is discharged from the other end.

  The treated water line L11 is connected to the treated water outlet 26 of the ballast water filtration device 2 at one end and is connected to the ballast tank 62 at the other end, and the ballast water filtered by the ballast water filtration device 2 is used. (Filtered water) W2 is a line through which W2 flows toward the ballast tank 62. The treated water line L11 is provided with a treated water outlet 26, a connection part J21, a valve V11, a connection part J11, an ultraviolet reactor 61, a valve V12, and a ballast tank 62 in this order.

  The stored treated water discharge line L12 is connected to the connecting portion J11 of the treated water line L11 at one end, and discharges ballast water (stored treated water) W3 from the other end. The stored treated water discharge line L12 is provided with a connecting portion J11, a valve V13, a connecting portion J23, a stored treated water discharge pump P11, and a valve V14 in this order.

  The backwash water distribution line L21 is a line that is connected to the connection portion J21 of the treated water line L11 at one end and is connected to the backwash water jet nozzle 6 at the other end. Ballast water (filtered water) W2, ballast water (reserved treated water) W3, and clean water W4 flow through the backwash water distribution line L21. The backwashing water distribution line L21 is provided with a connecting portion J21, a valve V21, a connecting portion J24, a first backwashing water pump P21, a regenerative filter 70, and a second backwashing water pump P22 in this order.

  The regeneration water line L24 is a line connected at one end to the connection J23 of the stored treated water discharge line L12 and connected at the other end to the connection J24 of the backwash water distribution line L21. Ballast water (reserved treated water) W3 flows through the regeneration water line L24 toward the connection portion J24 of the backwash water distribution line L21. The regeneration water line L24 is provided with a connecting portion J23, a valve V24, a connecting portion J25, and a connecting portion J24 in this order.

  The clean water line L25 is a line that is connected to the clean water tank 63 at one end and is connected to the connection portion J25 of the regeneration water line L24 at the other end. In the clean water line L25, the clean water W4 stored in the clean water tank 63 flows toward the connection portion J25 of the regeneration water line L24.

  The regeneration drainage line L26 is connected to the regeneration filter 70 at one end, and discharges the regeneration drainage W3 and the rinse drainage W4 when the regeneration filter 70 is regenerated from the other end.

  Various valves and pumps are provided at various points in the line. Specifically, a pumping pump P1 is provided upstream of the connecting portion J1 in the treated water introduction line L1. The pumping pump P1 pumps up the treated water W1 (mainly seawater) from one end of the treated water introduction line L1. A valve V1 is provided between the pumping pump P1 and the connection portion J1 in the treated water introduction line L1. The treated water discharge line L2 is provided with a valve V2.

A valve V11 is provided between the treated water outlet 26 and the ultraviolet reactor 61 in the treated water line L11 (specifically, between the connecting portion J21 and the connecting portion J11). A valve V12 is provided between the ultraviolet reactor 61 and the ballast tank 62 in the treated water line L11.
A valve V13 is provided between the connection portion J11 and the connection portion J23 in the stored treated water discharge line L12. A stored treated water discharge pump P11 and a valve V14 are provided on the downstream side of the connection portion J23 in the stored treated water discharge line L12.

  A valve V21 is provided between the connection portion J21 and the connection portion J24 in the backwash water distribution line L21. Between the connection part J24 and the regeneration filter 70 in the backwash water distribution line L21, a first backwash water pump P21 is provided. A second backwash water pump P22 is provided between the regenerative filter 70 and the backwash water injection nozzle 6 in the backwash water distribution line L21. The first backwash water pump P <b> 21 pressurizes water (W <b> 2, W <b> 3, W <b> 4) flowing through the backwash water distribution line L <b> 21 upstream of the regenerative filter 70 toward the regenerative filter 70. The second backwash water pump P22 pressurizes the backwash water W2 filtered by the regenerative filter 70 toward the backwash water jet nozzle 6.

  A valve V24 is provided between the connection portion J23 and the connection portion J25 in the regeneration water line L24. A valve V25 is provided in the clean water line L25. The regeneration drainage line L26 is provided with a valve V26.

  Next, the detail of the ballast water filtration apparatus 2 is demonstrated. The casing 51 is formed in a cylindrical shape having an upper opening and a lower opening. The upper opening is sealed with the lid 10 and the lower opening is sealed with the bottom 11. An air vent line L31 is connected to the lid portion 10. The air vent line L31 is provided with an air vent valve V31 for venting air inside the casing 51.

The filter 52 is formed in a cylindrical shape having an upper opening and a lower opening. A treated water outflow space 27 is formed between the casing 51 and the filter 52. The upper opening is sealed with an upper closing portion 13. The lower opening is sealed with a lower closing portion 14 and a lower rotating shaft member 16 described later.
The configuration of the filter 52 is preferably a configuration in which a filter body such as a metal mesh formed in a cylindrical shape is sandwiched between a support body in which two metal thin plates provided with a large number of holes are formed in a cylindrical shape. The configuration of the filter 52 may be a configuration in which a filter body is provided on the outer peripheral surface of a support body in which a thin metal plate having a large number of holes is formed in a cylindrical shape.

  The filter rotating means 3 includes an upper rotating shaft member 15, a lower rotating shaft member 16, and a motor 17 that rotates the upper rotating shaft member 15. The upper rotary shaft member 15 is provided on the upper closing portion 13 of the filter 52 so as to protrude upward in the axial direction at the axial center position of the filter 52. The lower rotating shaft member 16 is provided on the lower closing portion 14 of the filter 52 so as to protrude downward in the axial direction at the axial center position of the filter 52.

  The upper rotary shaft member 15 is rotatably and liquid-tightly supported by the lid portion 10 through a bearing member 18 that passes through and is sealed through the lid portion 10 of the casing 51. The lower rotary shaft member 16 is rotatably and liquid-tightly supported on the bottom portion 11 through a bearing member 19 that passes through the bottom portion 11 of the casing 51 and is sealed. The lower rotary shaft member 16 is a tubular body that communicates with the inside of the filter 52, and protrudes from the bottom 11 of the casing 51 to the outside of the casing 51. The lower rotating shaft member 16 is connected to the treated water inlet 20 to the casing 51.

A treated water introduction line L1 is connected to the treated water introduction port 20. A treated water outlet 26 is provided on the side of the casing 51. A treated water line L11 is connected to the treated water outlet 26.
The treated water W1 that flows through the treated water introduction line L1 and introduced from the treated water introduction port 20 passes through the lower rotary shaft member 16 and enters the filter 52. The treated water W1 is filtered through the filter 52, enters the treated water outflow space 27 formed between the casing 51 and the filter 52, and flows out from the treated water outlet 26.

  The cleaning sewage discharging means 5 includes a cleaning sewage collecting pipe 28, a cleaning sewage discharge pipe 29, and a valve V32. The cleaning sewage collecting pipe 28 is connected to the suction nozzle 4. In the cleaning sewage collecting pipe 28, the cleaning sewage W11 sucked by the suction nozzle 4 is collected. The cleaning sewage discharge pipe 29 is connected to the lower end portion of the cleaning sewage collecting pipe 28 and discharges the cleaning sewage W11 to the outside. The valve V32 is provided in the cleaning sewage discharge pipe 29.

  In the cleaning sewage collecting pipe 28, the upper end is closed and the lower end is opened. The cleaning sewage collecting pipe 28 is disposed at the axial center of the filter 52. The upper end portion of the cleaning sewage collecting pipe 28 is rotatably fitted in a hole provided in the center of the upper closing portion 13 of the filter 52 via the bearing member 18. The lower end of the cleaning sewage collecting pipe 28 passes through the inside of the lower rotary shaft member 16 of the lower closing portion 14 of the filter 52 so as not to prevent the rotation of the filter 52 and is fixed to the treated water inlet 20 of the casing 51. It is supported.

  The suction nozzle 4 is connected to the cleaning sewage collecting pipe 28 and opens toward the inner peripheral surface of the filter 52. The suction nozzle 4 is preferably capable of sucking from the entire axial direction of the filter 52. The configuration of the suction nozzle 4 is not particularly limited. For example, a plurality of suction nozzles 4 can be arranged in a linear shape in the axial direction of the filter 52 and / or at different angles in the circumferential direction. The plurality of suction nozzles 4 arranged at different angles in the circumferential direction may be arranged at the same height, or may be arranged at different heights.

  In the present embodiment, the plurality of suction nozzles 4 are linearly arranged in the axial direction (vertical direction) of the filter 52 and connected to the cleaning sewage collecting pipe 28. The opening of the suction nozzle 4 that opens toward the filter 52 at a position facing the inner peripheral surface of the filter 52 is slidably in close contact with the inner peripheral surface of the filter 52.

  In order to eliminate unsucked portions between the plurality of suction nozzles 4 arranged in the vertical direction, the filter 52 is arranged in two rows in the axial direction, and the suction nozzles in the other row are arranged between the suction nozzles 4 in one row. 4 is located. Specifically, the plurality of suction nozzles 4 are alternately arranged in the height direction on the left and right sides of the cleaning sewage collecting pipe 28. As another example of arranging the suction nozzle 4 in the axial direction of the filter 52, a plurality of suction nozzles 4 are arranged in a spiral shape in the axial direction of the filter 52 at intervals at which no non-suction part exists between the suction nozzles 4. May be.

  With the opening of the suction nozzle 4 slidably contacting the inner peripheral surface of the filter 52, the plurality of suction nozzles 4 are linearly arranged in the axial direction of the filter 52 and connected to the cleaning sewage collecting pipe 28. ing. The plurality of suction nozzles 4 arranged in the vertical direction are alternately arranged in the height direction on the left and right sides of the cleaning sewage collecting pipe 28 in order to eliminate unsucked portions between the suction nozzles 4. Therefore, suction from the entire inner peripheral surface of the filter 52 can be performed by one rotation of the filter 52.

  The backwash water injection nozzle 6 is provided on the side of the casing 51 and opens inside the casing 51. It is preferable that the backwash water injection nozzle 6 can inject backwash water over the entire axial direction of the filter 52. The configuration of the backwash water jet nozzle 6 is not particularly limited. For example, a plurality of backwashing water injection nozzles 6 can be arranged in a linear shape in the axial direction of the filter 52 and / or at different angles in the circumferential direction. A plurality of backwashing water injection nozzles 6 arranged at different angles in the circumferential direction may be arranged at the same height, or may be arranged at different heights. In the present embodiment, the backwash water jet nozzle 6 is positioned on the same circumference as each of the plurality of suction nozzles 4 disposed in front of the suction nozzle 4 in a direction opposite to the rotation direction of the filter 52. It is provided so that it may be located in. The backwashing water injection nozzle 6 may be provided at each position facing each suction nozzle 4, or positioned behind the suction nozzle 4 in a direction facing the rotation direction of the filter 52. It may be provided as follows.

  The backwashing water supply means 7 pressurizes the filtered water W2 filtered by the filter 52 and supplies the filtered water W2 to the backwashing water jet nozzle 6 as backwashing water W2. The backwash water supply means 7 includes a first backwash water pump P21, a second backwash water pump P22, a valve V21, a valve V11, and the like.

  The backwashing water injection nozzle 6 injects backwashing water W <b> 2 onto the outer peripheral surface (secondary side) of the filter 52, and peels off foreign matter accumulated on the primary side of the filter 52. Suction by the suction nozzle 4 is performed immediately after peeling. The foreign matter separated from the filter 52 by the backwash water W2 ejected from the backwash water jet nozzle 6 is effectively sucked by the suction nozzle 4 by opening the valve V32 provided in the wash sewage discharge pipe 29. Since the pressure on the secondary side of the valve V32 is open to atmospheric pressure, the pressure inside the cleaning sewage collecting pipe 28 becomes lower than the pressure on the secondary side of the filter 52, and the filtration on the secondary side of the filter 52 is performed. A part of the treated water W2 and the backwash water W2 sprayed from the backwash water jet nozzle 6 become the wash sewage W11, circulate inside the wash sewage collecting pipe 28, and are discharged from the wash sewage discharge pipe 29 to the outside. .

  The differential pressure detection means 8 detects the differential pressure between the primary side and the secondary side of the filter 52. The differential pressure detecting means 8 includes a primary pressure sensor 37 disposed inside the filter 52 and a secondary pressure sensor 38 disposed in the treated water outflow space 27. The differential pressure detection means 8 detects the pressure on the primary side of the filter 52 with the primary side pressure sensor 37, detects the pressure on the secondary side of the filter 52 with the secondary side pressure sensor 38, and detects the primary side of the filter 52. Detects the differential pressure with the secondary side. Based on the differential pressure between the primary side and the secondary side of the filter 52, the degree of contamination of the filter 52 can be determined. When the differential pressure is large, it indicates that the amount of foreign matter accumulated on the filter 52 is large, and when the differential pressure is small, the filter 52 is in a state close to the initial state (state where the amount of foreign matter accumulated is small). It is shown that.

  As the backwash water supplied to the backwash water jet nozzle 6, in this embodiment, filtered water W2 filtered by the filter 52 is used.

  The filtered treated water W2 flowing through the backwash water distribution line L21 is introduced into the regenerative filter 70 and filtered. The filtered backwash water W2 flows through the backwash water distribution line L21, is pressurized by the second backwash water pump P22, and is supplied to the backwash water injection nozzle 6 as backwash water W2 to the filter 52. The

Next, main operations of the ballast water treatment apparatus 1 of the present embodiment will be briefly described.
(1) Filtration treatment of treated water W1 by the ballast water filtration device 2 (ballast water treatment operation)
The valve V1, the valve V11, and the valve V12 are opened, and the valve V2, the valve V13, the valve V21, the valve V31, and the valve V32 are closed. In this state, the pumping pump P1 is driven. Thereby, the to-be-processed water W1 which flowed in from the one end part of the to-be-processed water introduction line L1 distribute | circulates the to-be-processed water introduction line L1. The treated water W1 introduced from the treated water introduction port 20 is filtered by the filter 52 and discharged from the treated water outlet 26 as filtered treated water W2. The filtered treated water W2 flows through the treated water line L11, is subjected to ultraviolet treatment by the ultraviolet reactor 61, and is stored in the ballast tank 62 as stored treated water W3.

(2) Back washing treatment of the filter 52 by the back washing water jet nozzle 6 (back washing during the ballast water treatment operation)
The valve V1, the valve V11, the valve V12, the valve V21 and the valve V32 are opened, the other valves are closed, and the filtered water W2 (backwash water W2) filtered by the regenerative filter 70 is the backwash water jet nozzle 6 Circulate toward the And suction of the 1st backwash water pump P21, the 2nd backwash water pump P22, and the suction nozzle 4 is operated in the state where ballast water (W2, W1) existed in the inside of casing 51 and filter 52. Thereby, the backwash water (filtered water) W2 from the backwash water jet nozzle 6 is jetted toward the filter 52, and backwashing is performed.

(3) Regeneration (back washing) treatment of regenerative filter 70 with stored treated water W3 Valve V12, valve V13, valve V24 and valve V26 are opened, and valve V11, valve V14, valve V21 and valve V25 are closed (note that The valve V14 may be open). The regenerative filter 70 is in a regeneration (backwash) mode. In this state, the first backwash water pump P21 is operated. Thereby, the stored treated water W3 stored in the ballast tank 62 is subjected to ultraviolet treatment by the ultraviolet reactor 61, and passes through the treated water line L11, the stored treated water discharge line L12, the regeneration water line L24, and the backwash water distribution line L21. The regenerated filter 70 is supplied to the regenerative filter 70 and regenerated (backwashed). The recycled wastewater W3 is discharged to the outside through the recycled wastewater line L26.

(4) Rinsing process for regeneration of regenerative filter 70 with clean water W4 Valves V25 and V26 are opened, and valves V24 and V21 are closed. In this state, the first backwash water pump P21 is operated. The regenerative filter 70 is in a regeneration (rinse) mode. Thereby, the clean water W4 stored in the clean water tank 63 is supplied to the regenerative filter 70 via the clean water line L25, the regeneration water line L24, and the backwash water distribution line L21. Rinse regeneration. The rinsing waste water W4 is discharged to the outside through the regeneration drain line L26.

(5) Wastewater treatment of the stored treated water W3 from the ballast tank 62 to the outside The valves V12, V13, and V14 are opened, and the valves V11 and V24 are closed. In this state, the stored treated water discharge pump P11 provided in the stored treated water discharge line L12 is operated. Thereby, the stored treated water W3 stored in the ballast tank 62 is subjected to ultraviolet treatment by the ultraviolet reactor 61 and discharged to the outside via the treated water line L11 and the stored treated water discharge line L12.

According to the ballast water treatment device 1 of the present embodiment, for example, the following effects can be obtained.
The ballast water treatment apparatus 1 of the present embodiment includes a cylindrical filter 52 that filters the ballast water W1 that has flowed into the interior thereof and flows out to the outside, a ballast tank 62 that stores the ballast water W2 that has been filtered by the filter 52, A backwashing water injection nozzle 6 that is provided on the secondary side of the filter 52 and injects the backwashing water W2 toward the filter 52, and a backwashing water flow through which the backwashing water W2 flows toward the backwashing water injection nozzle 6. The line L21 and the regenerative filter 70 that is provided in the backwash water distribution line L21 and filters the backwash water W2 that flows through the backwash water distribution line L21.

  Therefore, the cleanliness of the backwash water to the filter 52 can be improved. In addition, the regenerative filter 70 is excellent in maintainability because it can recover the filtration function without replacing the filter or the like of the regenerative filter 70 by performing a regeneration process.

  Further, in the ballast water treatment apparatus 1 of the present embodiment, the ballast water (stored treated water) W3 stored in the ballast tank 62 is used as regeneration water for backwashing and regenerating the regeneration filter 70. The Therefore, in a ship, the use of precious clean water can be suppressed, and the regenerative filter 70 can be backwashed and regenerated.

  Moreover, the ballast water treatment apparatus 1 of the present embodiment further includes a clean water tank 63 that stores clean water. After the ballast water (reserved treated water) W3 stored in the ballast tank 62 is used as regeneration water, the clean water W4 stored in the clean water tank 63 is used for regeneration rinsing for regeneration of the regeneration filter 70. Used as irrigation water. Therefore, the regenerative filter 70 can be sufficiently regenerated by using a relatively small amount of precious clean water on a ship.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be implemented in various forms.

  In the embodiment, the stored treated water W3 stored in the ballast tank 62 is supplied to the regenerative filter 70 after being subjected to ultraviolet treatment by the ultraviolet reactor 61, but is not limited thereto. For example, the stored treated water W <b> 3 may be supplied to the regenerative filter 70 without being subjected to the ultraviolet treatment by the ultraviolet reactor 61.

  In the above-described embodiment, the filtered water W2 filtered by the filter 52 and not passing through the ballast tank 62 is used as the backwash water for backwashing the filter 52, but is not limited thereto. The stored treated water W3 stored in the ballast tank 62 may be used as backwash water.

  In the above-described embodiment, in the state where the ballast water (W2, W1) is present inside the casing 51 and the filter 52, the backwash treatment of the filter 52 by the backwash water jet nozzle 6 (backwash during the ballast water treatment operation). However, it is not limited to this. After the filtration of the water to be treated W1, the filter 52 is backwashed by the backwash water jet nozzle 6 (space washing) in a state where the ballast water (W2, W1) is not substantially present inside the casing 51 and the filter 52. ) May be performed.

  Specifically, after the filtration of the treated water W1 is completed, the valve V2 of the treated water discharge line L2 and the valve V31 of the air vent line L31 are opened, the other valves are closed, and the water in the filter 52 is discharged. . Then, in a state in which the ballast water (W2, W1) is not substantially present inside the casing 51 and the filter 52, the valve V32 provided in the clean water line L25 and the cleaning sewage discharge pipe 29 are opened, and the first The backwash water pump P21 and the second backwash water pump P22 are operated. Thereby, the clean water W4 stored in the clean water tank 63 flows through the clean water line L25, the regeneration water line L24, and the backwash water distribution line L21, and the first backwash water pump P21 and the second backwash water pump. Pressurized by P22 and sprayed as backwash water W2 from the backwash water spray nozzle 6 toward the filter 52, and backwash is performed.

  In the embodiment, the ballast water (reserved treated water) W3 stored in the ballast tank 62 is used as regeneration water for backwashing (regeneration) of the regeneration filter 70 and stored in the clean water tank 63. The clean water W4 to be used is used as regenerated rinsing water for regenerating rinsing of the regenerative filter 70, but is not limited thereto. The ballast water (reserved treated water) W3 stored in the ballast tank 62 is not used as regeneration water for backwashing the regeneration filter 70 (in the above embodiment, the connection portion J23 and the connection portion J25 in the regeneration water line L24). In other words, the clean water W4 stored in the clean water tank 63 can be used as water for backwashing (regeneration) and rinsing of the regenerative filter 70.

DESCRIPTION OF SYMBOLS 1 Ballast water treatment apparatus 2 Ballast water filtration apparatus 4 Suction nozzle 6 Backwash water injection nozzle 7 Backwash water supply means 52 Filter 61 Ultraviolet reactor 62 Ballast tank 63 Clean water tank 70 Regenerative filter L21 Backwash water distribution line W1 Ballast Water, treated water W2 Ballast water, filtered water, backwash water W3 Ballast water, stored treated water, reclaimed water, reclaimed wastewater W4 clean water, reclaimed rinse water, rinse wastewater

Claims (3)

A cylindrical filter that filters the ballast water flowing into the interior and outflows to the outside;
A backwash water injection nozzle that is provided on the secondary side of the filter and injects backwash water toward the filter;
A backwash water distribution line through which backwash water circulates toward the backwash water injection nozzle;
A regenerative filter that is provided in the backwash water distribution line and filters backwash water flowing through the backwash water distribution line;
Backwash water supply that supplies filtered water that has been filtered by the filter and that does not pass through the ballast tank or filtered water stored in the ballast tank to the backwash water jet nozzle as backwash water Means,
A ballast water treatment apparatus comprising: A cylindrical filter for filtering the ballast water flowing into the primary side and flowing it out to the secondary side;
A backwash water injection nozzle that is provided on the secondary side of the filter and injects backwash water toward the filter;
A backwash water distribution line through which backwash water circulates toward the backwash water injection nozzle;
A regenerative filter that is provided in the backwash water distribution line and filters backwash water flowing through the backwash water distribution line;
With
Ballast water stored in the ballast tanks is utilized as a reproduction water for regenerating the regenerative filter, ballast water treatment system. A clean water tank for storing clean water;
The clean water stored in the clean water tank is used as regenerated rinsing water for regenerating rinse of the regenerative filter after the ballast water stored in the ballast tank is used as reclaimed water. The ballast water treatment apparatus according to 2.

Images