WO2015068246A1 - バラスト水処理装置 - Google Patents
バラスト水処理装置 Download PDFInfo
- Publication number
- WO2015068246A1 WO2015068246A1 PCT/JP2013/080160 JP2013080160W WO2015068246A1 WO 2015068246 A1 WO2015068246 A1 WO 2015068246A1 JP 2013080160 W JP2013080160 W JP 2013080160W WO 2015068246 A1 WO2015068246 A1 WO 2015068246A1
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- WO
- WIPO (PCT)
- Prior art keywords
- filter
- water
- ballast water
- pressure fluid
- water treatment
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
- B01D33/503—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles the backwash arms, shoes acting on the cake side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
- B01D33/463—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
- B01D33/804—Accessories integrally combined with devices for controlling the filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
- B01D33/804—Accessories integrally combined with devices for controlling the filtration
- B01D33/805—Accessories integrally combined with devices for controlling the filtration by clearness or turbidity measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
- B01D33/804—Accessories integrally combined with devices for controlling the filtration
- B01D33/806—Accessories integrally combined with devices for controlling the filtration by flow measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
- B01D33/804—Accessories integrally combined with devices for controlling the filtration
- B01D33/808—Accessories integrally combined with devices for controlling the filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J4/00—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for
- B63J4/002—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for for treating ballast water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/001—Build in apparatus for autonomous on board water supply and wastewater treatment (e.g. for aircrafts, cruiseships, oil drilling platforms, railway trains, space stations)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Definitions
- the present invention relates to a ballast water treatment apparatus in which a cylindrical filter that filters ballast water that has flowed inside and flows out of the ballast water is disposed inside the casing.
- ballast water In a ship such as a tanker, when navigating to the destination again after unloading the crude oil etc. of the cargo, water called ballast water is usually placed in the ballast tank provided in the ship in order to balance the navigating ship.
- Ballast water is basically taken at the loading port and discharged at the loading port, so if they are located in different locations, plankton and bacterial microorganisms contained in the ballast water will move around the world. become. 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.
- ballast water management treaty In order to prevent the destruction of the marine environment due to this ballast water, the International Maritime Organization (IMO) has concluded a ballast water management treaty, and as a standard for ballast water discharge, the microorganisms contained in the ballast water discharged out of the ship The content is regulated.
- plankton of 50 ⁇ m or more is determined to be less than 10 individuals / m 3 and plankton of 10 to 50 ⁇ m is less than 10 individuals / ml according to the size of plankton.
- Escherichia coli is defined as less than 250 cfu / 100 ml.
- ballast water when ballast water is stored in a ballast tank, it is required that the microorganisms in the ballast water be killed and detoxified.
- Ballast water filtration by a ballast water treatment device in which a filter for filtering the ballast water is disposed in the casing and ultraviolet irradiation to the ballast water by the ultraviolet irradiation device as means for detoxifying the microorganisms in the ballast water
- the processing method by is known.
- 99.99% removal performance is required for plankton of 50 ⁇ m or more, and therefore a filter body such as a very small wire mesh is required. Yes. For this reason, clogging is severe and constant filter cleaning is important.
- Patent Document 1 discloses a suction nozzle that opens at a position facing the inner surface of the filter, and the suction nozzle along the inner surface of the filter along the axial and circumferential directions of the filter.
- a filtration device comprising backwash nozzle moving means for moving to is described.
- the filter is washed by the filtration device described in Patent Document 1 when the pressure difference between the inside and outside of the filter exceeds a predetermined pressure, the mud valve is opened, and the suction nozzle and the backwash nozzle are connected by the nozzle moving means and the backwash nozzle moving means. While being moved, the backwashing water is discharged from the backwashing nozzle, the suspended matter accumulated on the filter is removed with the washing water, and the mud is discharged from the suction nozzle.
- the suction nozzle and backwash nozzle are operated so as to move in the axial direction of the filter while turning along the inner surface of the filter.
- a problem that it took a long time.
- a complicated mechanism is required to move the suction nozzle and the backwash nozzle in the axial direction while rotating in synchronization with each other, and complicated work is required for manufacturing and maintenance.
- An object of the present invention is to enable efficient and effective cleaning of a cylindrical filter that filters out ballast water that has flowed into the interior and flows it out, simplifies the configuration, and facilitates manufacturing and maintenance.
- An object of the present invention is to provide a ballast water treatment apparatus.
- the invention described in claim 1 is a ballast water treatment apparatus in which a cylindrical filter that filters the ballast water that has flowed into the inside thereof and discharges the ballast water to the outside is disposed in the casing.
- Filter rotating means for rotating the filter about its axis, a suction nozzle provided on the primary side of the filter and opening toward the inner peripheral surface of the filter, and cleaning sewage sucked by the suction nozzle
- Washing sewage discharging means for discharging from the casing to the outside, a high pressure fluid ejection nozzle provided on the secondary side of the filter, opening toward the outer peripheral surface of the filter, and ejecting high pressure fluid toward the filter
- a ballast water treatment apparatus comprising high-pressure fluid supply means for supplying a high-pressure fluid to the high-pressure fluid ejection nozzle.
- foreign matter can be removed from the filter by the suction nozzle provided on the primary side of the filter sucking the foreign matter that has accumulated in the filter. And after completion
- the foreign matter deposited on the inner peripheral surface can be reliably peeled off and removed.
- the invention according to claim 2 is provided with a washing water jet nozzle provided on the secondary side of the filter, opening toward the outer peripheral surface of the filter, and jetting washing water toward the filter.
- the cleaning water ejection nozzle provided on the secondary side of the filter is deposited on the filter by ejecting the cleaning water toward the filter. Since the foreign matter is peeled off, the foreign matter deposited on the filter can be effectively removed.
- the washing water ejection nozzle is located on the same circumference as the suction nozzle and is located in front of the suction nozzle in a direction opposite to the rotation direction of the filter.
- the cleaning water is applied to the outer peripheral surface of the filter from the cleaning water jet nozzle in front of the suction nozzle in a direction opposite to the rotation direction of the filter.
- the foreign matter accumulated on the primary side of the filter can be efficiently peeled off and the suction nozzle performs suction immediately after peeling, so that the foreign matter can be effectively removed by suction. .
- the differential pressure detecting means for detecting the differential pressure between the primary side and the secondary side of the filter, and the rotational speed of the filter is controlled based on the differential pressure detected by the differential pressure detecting means.
- the ballast water treatment apparatus according to any one of claims 1 to 3, further comprising a control unit that performs the control.
- the rotational speed of the filter is controlled based on the differential pressure detected by the differential pressure detecting means, the unit time with respect to the rotational speed of the filter corresponding to the differential pressure It is possible to change the fluid ejection length of the cleaning water ejection nozzle, and to effectively remove foreign matter accumulated on the inner peripheral surface of the filter in a short time and to rotate the filter more than necessary. Can be suppressed.
- a differential pressure detecting means for detecting a differential pressure between the primary side and the secondary side of the filter, and a ballast when the differential pressure detected by the differential pressure detecting means reaches a predetermined pressure. 4.
- the ballast water treatment operation is stopped and the water in the casing is discharged, and the high-pressure fluid is discharged. Since the high-pressure fluid is ejected from the ejection nozzle, it is possible to reliably peel off and remove the foreign matter accumulated so as not to be removed from the filter by suction by the suction nozzle during the ballast water treatment operation.
- the invention according to claim 6 is a ballast water treatment operation when water quality measuring means for measuring the quality of water to be treated introduced into the casing and when the water quality measured by the water quality measuring means reaches a predetermined water quality. 4.
- the ballast water treatment operation is stopped and the water in the casing is discharged, and the high-pressure fluid ejection nozzle Since the high-pressure fluid is ejected from the filter, the foreign matter accumulated to the extent that it cannot be removed from the filter by suction by the suction nozzle during the ballast water treatment operation can be reliably peeled off and removed from the filter.
- a time measuring means for measuring the filtration processing time, and when the time measured by the time measuring means reaches a predetermined time, the ballast water treatment operation is stopped and the water in the casing is stopped.
- the ballast water treatment device according to any one of claims 1 to 3, further comprising control means for controlling the discharge of the high-pressure fluid from the high-pressure fluid jet nozzle.
- the ballast water treatment operation is stopped, the water in the casing is discharged, and the high-pressure fluid ejection nozzle Since the high-pressure fluid is ejected from the filter, the foreign matter accumulated to the extent that it cannot be removed from the filter by suction by the suction nozzle during the ballast water treatment operation can be reliably peeled off and removed from the filter.
- the invention according to claim 8 is a counting means for counting the number of times of ballast water treatment operation, and when the number of times counted by the counting means reaches a predetermined number of times, the ballast water treatment operation is stopped and the casing
- the ballast water treatment apparatus according to any one of claims 1 to 3, further comprising control means for discharging the water in the interior and controlling the high pressure fluid to be ejected from the high pressure fluid ejection nozzle. .
- the ballast water treatment operation is stopped, the water in the casing is discharged, and the high-pressure fluid ejection nozzle Since the high-pressure fluid is ejected from the filter, the foreign matter accumulated to the extent that it cannot be removed from the filter by suction by the suction nozzle during the ballast water treatment operation can be reliably peeled off and removed from the filter.
- the filter used for the ballast water treatment operation can be reliably and effectively washed.
- FIG. 1 It is a schematic sectional explanatory view showing an example of an embodiment of a ballast water treatment device concerning the present invention. It is a perspective view which shows the other example of suction nozzle arrangement
- FIG. 1 is an explanatory schematic sectional view of this example
- FIG. 2 is a perspective view showing another example of the arrangement of suction nozzles.
- the ballast water treatment apparatus of the present example is disposed in a cylindrical casing 1, and a cylindrical filter 2 that filters out the water to be treated that has flowed inside and flows out to the outside, and a filter 2 centered on the axis thereof.
- the filter rotating means 3 for rotating the filter 2, the suction nozzle 4 provided on the primary side of the filter 2 and opening toward the inner peripheral surface of the filter 2, and the cleaning sewage sucked by the suction nozzle 4 are discharged from the casing 1 to the outside.
- Washing sewage discharging means 5 a high pressure fluid jet nozzle 40 that is provided on the secondary side of the filter 2 and jets high pressure fluid toward the outer peripheral surface of the filter 2, and pressurizes and supplies the high pressure fluid to the high pressure fluid jet nozzle 40
- a high pressure fluid supply means 41 a cleaning water jet nozzle 6 that is provided on the secondary side of the filter 2 and jets cleaning water toward the outer peripheral surface of the filter 2, and supplies the cleaning water under pressure to the cleaning water jet nozzle 6
- Cleaning water supply means 7, differential pressure detection means 8 for detecting the differential pressure between the primary side and the secondary side of the filter 2, water quality measurement means 44 for measuring the quality of water to be treated introduced into the casing 1, and ,
- a time measuring means 45 for measuring the filtration treatment time, and a counting means 46 for counting the number of operation times of the ballast water treatment operation.
- the differential pressure detected by the differential pressure detecting means 8 reaches a predetermined pressure.
- Differential pressure detection Based on the differential pressure detected by the step 8, and a control unit 9 having a control function for controlling the rotational speed of the filter 2.
- the casing 1 is formed in a cylindrical shape, and an upper opening is sealed with a lid 10 and a lower opening is sealed with a bottom 11.
- the lid portion 10 is provided with an air vent valve 12 that vents air in the casing 1.
- the cylindrical filter 2 disposed in the casing 1 has an upper opening sealed with an upper closing portion 13, and a lower opening formed with a lower closing portion 14 and a lower rotating shaft member 16 described later, the casing 1 and the filter 2. Is separated from the treated water outflow space 27 side.
- the filter 2 preferably has a structure in which a filter body such as a metal mesh formed in a cylindrical shape is sandwiched between a support body formed in a cylindrical shape with two thin metal plates provided with a large number of holes.
- the structure which provided the filter body in the outer peripheral surface of the support body which formed the metal thin plate which provided this in the cylindrical shape may be sufficient.
- the filter rotation means 3 for rotating the filter 2 configured in this way is an upper rotation provided in the upper closing portion 13 and the lower closing portion 14 of the filter 2 so as to protrude in the axial direction at the axial center position of the filter 2.
- the shaft member 15, the lower rotary shaft member 16, and the motor 17 that rotates the upper rotary shaft member 15 are configured.
- the upper rotary shaft member 15 passes through the lid portion 10 of the casing 1 and is rotatably and liquid-tightly supported by the lid portion 10 via a sealed bearing member 18.
- the lower rotary shaft member 16 is supported by the bottom portion 11 of the casing 1. And is supported rotatably and liquid tightly on the bottom 11 through a sealed bearing member 19.
- the lower rotary shaft member 16 is a tubular body that communicates with the inside of the filter 2, and the treated water inlet 20 of the casing 1 is connected to the lower rotary shaft member 16 that protrudes outside the casing 1 from the bottom 11 of the casing 1. ing.
- a treated water introduction path 21 is connected to the treated water introduction port 20.
- the treated water introduction path 21 is provided with a pump 22 for pumping treated water, and an on-off valve 23 located downstream of the pump 22, and the treated water introduction path 21 on the downstream side of the on-off valve 23 is provided on the treated water introduction path 21.
- the drainage channel 24 is connected, and the drainage channel 24 is provided with an open / close valve 25.
- a treated water outlet 26 is provided on the side of the casing 1, and the treated water flowing through the treated water introduction path 21 and introduced from the treated water introduction port 20 passes through the lower rotary shaft member 16 and enters the filter 2. Then, it passes through the filter 2, is filtered, enters the treated water outflow space 27 formed between the casing 1 and the filter 2, and flows out from the treated water outlet 26.
- the cleaning sewage discharging means 5 will be described first.
- the on / off valve 30 provided in the sewage discharge pipe 29 is constituted.
- the cleaning sewage collecting pipe 28 is disposed in the axial center of the filter 2, has an upper end closed, a lower end opened, and an upper end supported in a hole provided in the center of the upper closing part 13 of the filter 2. It fits rotatably via 31. Further, the lower end portion of the cleaning sewage collecting pipe 28 passes through the lower rotary shaft member 16 of the lower closing portion 14 of the filter 2 so as not to disturb the rotation of the filter 2 and is fixed to the treated water inlet 20 of the casing 1. It is supported.
- a cleaning sewage discharge pipe 29 for discharging cleaning sewage to the outside is connected to the lower end portion of the cleaning sewage collecting pipe 28.
- the cleaning sewage discharge pipe 29 is provided with an on-off valve 30 that is always open during operation. Yes.
- the suction nozzle 4 connected to the cleaning sewage collecting pipe 28 and opening toward the inner peripheral surface of the filter 2 is preferably suckable from the entire axial direction of the filter 2, but the configuration is not particularly limited. .
- a plurality of suction nozzles 4 can be arranged in a linear shape in the axial direction of the filter 2 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 arranged at different heights.
- a plurality of suction nozzles 4 are used, arranged linearly in the axial direction of the filter 2 and connected to the cleaning sewage collecting pipe 28.
- the filter 2 is arranged in two rows in the axial direction, and the other suction chamber 4 is disposed between the suction nozzles 4 in one row.
- a row of suction nozzles 4 is located. Specifically, they are alternately arranged in the height direction on the left and right sides of the cleaning sewage collecting pipe 28.
- the plurality of suction nozzles 4 are arranged in the axial direction of the filter 2 at intervals that do not leave any unsucked portions between the suction nozzles 4. You may arrange
- the opening of the suction nozzle 4 that opens toward the filter 2 at a position facing the inner peripheral surface of the filter 2 is slidably in close contact with the inner peripheral surface of the filter 2.
- the high-pressure fluid ejection nozzle 40 provided on the secondary side of the filter 2 and opening toward the outer peripheral surface of the filter 2 is preferably capable of being ejected over the entire axial direction of the filter 2, but its configuration is particularly limited. It is not a thing.
- a plurality of high-pressure fluid ejection nozzles 40 can be arranged linearly in the axial direction of the filter 2 and / or at different angles in the circumferential direction.
- a plurality of high-pressure fluid ejection nozzles 40 that are arranged at different angles in the circumferential direction may be arranged at the same height or at different heights.
- clean water is used as the high-pressure fluid supplied to the high-pressure fluid ejection nozzle 40.
- clean water treated water processed by the filter 2, water stored in the ballast tank, domestic water or drinking water stored for the purpose of use for other purposes are used.
- the high-pressure fluid supply means 41 for supplying clean water to be a high-pressure fluid the tank 39 and the high-pressure fluid ejection nozzle 40 are connected by a clean water supply passage 42, and the clean water stored in the tank 39 is pumped by the pumps 43.
- the high pressure fluid jet nozzle 40 is pumped.
- clean water is used as the high-pressure fluid supplied to the high-pressure fluid ejection nozzle 40, but the high-pressure fluid may be high-pressure air.
- the high-pressure fluid supply means 41 supplies high-pressure air to the high-pressure fluid ejection nozzle 40 by an air compressor (not shown).
- the high pressure fluid may be water vapor.
- a washing water ejection nozzle 6 that ejects washing water toward the filter 2 is provided on a side portion of the casing 1 and opens in the casing 1.
- the washing water jet nozzle 6 is preferably capable of jetting washing water over the entire axial direction of the filter 2, but its configuration is not particularly limited.
- a plurality of cleaning water jet nozzles 6 can be arranged in a linear shape in the axial direction of the filter 2 and / or at different angles in the circumferential direction.
- the plurality of cleaning water jet nozzles 6 arranged at different angles in the circumferential direction may be arranged at the same height or may be arranged at different heights.
- the washing water jet nozzle 6 is positioned on the same circumference as each of the plurality of suction nozzles 4 arranged, and is positioned in front of the suction nozzle 4 in a direction facing the rotation direction of the filter 2. However, it may be provided at each position facing each suction nozzle 4 or may be located behind the suction nozzle 4 in a direction facing the rotation direction of the filter 2. It may be provided.
- the cleaning water supply means 7 that pressurizes and supplies the cleaning water to the cleaning water jet nozzle 6 uses the processing water processed by the filter 2 as the cleaning water, and is connected to the processing water outlet 26 of the filter 2.
- One end of the cleaning water supply channel 33 is connected to the middle of the treated water channel 32, the other end of the cleaning water supply channel 33 is connected to each cleaning water jet nozzle 6, and the treated water treated by the filter 2 is the cleaning water supply channel.
- the cleaning water jet nozzles 6 are supplied to the cleaning water jet nozzles 33.
- the cleaning water supply passage 33 is provided with a pump 34 that pumps treated water to each cleaning water ejection nozzle 6 and an open / close valve 35 on the upstream side of the pump 34.
- the pressure gauge 36 is provided on the downstream side of the pump 34, but this is not always necessary.
- treated water treated with the filter 2 is used as washing water.
- water stored in the ballast tank, domestic water or drinking water stored for other purposes. May be used as washing water.
- the differential pressure detection means 8 for detecting the differential pressure between the primary side and the secondary side of the filter 2 is a pressure sensor 37, 38 provided in the filter 2 and the treated water outflow space 27, and the primary side and secondary side of the filter 2 The pressure is detected, and the differential pressure between the primary side and the secondary side of the filter 2 is detected.
- the differential pressure between the primary side and the secondary side of the filter 2 can determine how dirty the filter 2 is. When the differential pressure is large, it indicates that the amount of foreign matter accumulated on the filter 2 is large. When the differential pressure is small Indicates that the filter 2 is in a state close to the initial state.
- a turbidity meter for measuring the turbidity of the water to be treated is used in this example, and provided in the treated water introduction path 21. Yes.
- the turbidity of the water to be treated can determine how dirty the filter 2 is. When the turbidity is high, it indicates that the amount of foreign matter accumulated on the filter 2 is large. When the turbidity is low, the filter 2 is in the initial state. It shows that it is in a state close to.
- a timer is used as the time measuring means 45 for measuring the filtration processing time.
- the degree of contamination of the filter 2 can be determined from the length of the measured time. When the time is long, it indicates that the amount of foreign matter accumulated on the filter 2 is large. When the time is short, the filter 2 is close to the initial state. It shows that it is in a state.
- a counter is used as the counting means 46 for counting the number of operation times of the ballast water treatment operation.
- the degree of contamination of the filter 2 can be determined based on the counted number. When the number is large, it indicates that the amount of foreign matter accumulated on the filter 2 is large. When the number is small, the filter 2 is in a state close to the initial state. It is shown that.
- the control means 9 When the differential pressure detected by the differential pressure detection means 8 reaches a predetermined pressure, when the water quality measured by the water quality measurement means 44 reaches a predetermined water quality, the control means 9 When the measured time reaches a predetermined time or when the number of operations counted by the counting means 46 reaches a predetermined number, the ballast water treatment operation is stopped and the water in the casing 1 is discharged, and the filter 2 And a control function for controlling the rotation speed of the filter 2 based on the differential pressure detected by the differential pressure detection means 8. ing.
- the foreign matter accumulated on the filter 2 is peeled off even when cleaning water is jetted from the cleaning water jet nozzle 6 described later to the outer peripheral surface of the filter 2 during the ballast water treatment operation.
- the differential pressure determined to be impossible is set as the predetermined pressure.
- the water quality is a predetermined level, the amount of foreign matter accumulated on the inner peripheral surface of the filter 2 that can be estimated from the quality of the water to be treated introduced into the casing 1 cannot be removed by suction of the suction nozzle 4.
- the determined water quality is set as the predetermined water quality.
- the water quality measuring means 44 for example, a turbidimeter that measures the turbidity of the water to be treated is used.
- the predetermined time is set as a time during which it is determined that the amount of foreign matter accumulated on the inner peripheral surface of the filter 2 that can be estimated from the filtration processing time cannot be removed by the suction of the suction nozzle 4. Has been.
- the predetermined number of times is reached, the number of times that it is determined that the amount of foreign matter accumulated on the inner peripheral surface of the filter 2 that can be estimated by the number of ballast water treatment operations cannot be removed by the suction of the suction nozzle 4 is obtained. It is set as a predetermined number of times.
- the differential pressure detected by the differential pressure detecting means 8 described above reaches a predetermined pressure
- the water quality measured by the water quality measuring means 44 reaches a predetermined water quality
- the time measuring means 45 When the time reaches a predetermined time or when the number of operations counted by the counting means 46 reaches a predetermined number, the ballast water treatment operation is stopped, the water in the casing 1 is discharged, and the filter 2 is rotated.
- the control functions for controlling the high-pressure fluid to be ejected from the high-pressure fluid ejection nozzle 40 can be performed simultaneously or selectively.
- the control function for controlling the rotational speed of the filter 2 based on the differential pressure detected by the differential pressure detection means 8 included in the control means 9 is the initial differential pressure stored in the control means 9 in this example.
- the permissible differential pressure is set ( ⁇ P1) with respect to the pressure, and the differential pressure is set in several steps at ⁇ P1 or more, and the rotational speed of the filter 2 can be changed according to the differential pressure level. ing.
- ⁇ P1, ⁇ P2, and ⁇ P3 are set stepwise in the direction of increasing the differential pressure, and in the direction of increasing the rotational speed of the filter 2 in accordance with the set differential pressure.
- N1, N2, N3, and N4 are set in stages.
- the rotation speed of the filter 2 is N1, and when the differential pressure exceeds ⁇ P1, the rotation speed is N2, and the differential pressure exceeds ⁇ P2. Then, the rotational speed is controlled to be N3, and when the differential pressure exceeds ⁇ P3, the rotational speed is controlled to be N4. As another example, when the differential pressure is ⁇ P1 or less, the rotation of the filter 2 is stopped. When the differential pressure exceeds ⁇ P1, the rotational speed is N1, and when the differential pressure exceeds ⁇ P2, the rotational speed is N2. When the value exceeds ⁇ P3, the rotational speed may be controlled to be N3.
- control means 9 can be controlled to eject cleaning water from the cleaning water ejection nozzle 6 when the differential pressure detected by the differential pressure detection means 8 reaches the second predetermined pressure.
- it has a function of controlling the ejection pressure of the washing water from the washing water ejection nozzle 6 in accordance with the detected differential pressure.
- a differential pressure at which it is determined that the amount of foreign matter accumulated on the filter 2 cannot be removed by the suction of the suction nozzle 4 is set as the second predetermined pressure.
- the initial differential pressure is stored, the allowable differential pressure is set ( ⁇ P1) with respect to the initial differential pressure ( ⁇ P1), and the differential pressure is set in several steps above ⁇ P1.
- a plurality of suction nozzles 4 are used as the suction nozzles 4 connected to the cleaning sewage collecting pipe 28, and the openings of the suction nozzles 4 slide on the inner peripheral surface of the filter 2.
- the suction nozzles 4 are arranged in a straight line in the axial direction of the filter 2 and connected to the cleaning sewage collecting pipe 28 in a state where they are in close contact with each other. Therefore, suction from the entire inner peripheral surface of the filter 2 can be performed by one rotation of the filter 2 because the cleaning sewage collecting pipe 28 is alternately arranged on the left and right sides in the height direction.
- the on-off valve 30 provided in the cleaning sewage discharge pipe 29 is always open during operation, and the pressure on the secondary side of the on-off valve 30 is open to the atmospheric pressure.
- the pressure becomes lower than the pressure on the secondary side of the filter 2, and the treated water on the secondary side of the filter 2 flows into the cleaning sewage collecting pipe 28 as cleaning sewage and is discharged from the cleaning sewage discharge pipe 29 to the outside.
- the high-pressure fluid ejection nozzle 40 that ejects the high-pressure fluid toward the filter 2 uses a plurality of high-pressure fluid ejection nozzles 40 and can eject all over the axial direction of the filter 2, so that the filter 2 rotates once.
- the high-pressure fluid is ejected over the entire outer peripheral surface of the filter 2, and the foreign matter accumulated on the primary side of the filter 2 can be efficiently separated.
- a plurality of cleaning water jet nozzles 6 are used as the cleaning water jet nozzles 6 that jet the cleaning water toward the filter 2.
- the cleaning water jet nozzles 6 are arranged so that the cleaning water can be jetted over the entire axial direction of the filter 2. Since each of the suction nozzles 4 is located on the same circumference and in front of the suction nozzle 4 in a direction opposite to the rotation direction of the filter 2, Since the cleaning water is jetted to the entire outer peripheral surface of the filter 2 by rotation, the foreign matter accumulated on the primary side of the filter 2 can be efficiently peeled off, and suction is performed by the suction nozzle 4 immediately after peeling. The foreign matter separated from the filter 2 by the cleaning water ejected from the cleaning water ejection nozzle 6 is effectively sucked by the suction nozzle 4.
- the on-off valve 30 provided in the cleaning sewage discharge pipe 29 is always open during operation, and the pressure on the secondary side of the on-off valve 30 is open to the atmospheric pressure.
- the pressure becomes lower than the pressure on the secondary side of the filter 2, and the treated water on the secondary side of the filter 2 and the washing water ejected from the washing water jet nozzle 6 become washing wastewater and flow into the washing wastewater collecting pipe 28. Then, it is discharged from the cleaning sewage discharge pipe 29 to the outside.
- the pressure sensors 37 and 38 always detect the primary and secondary pressures of the filter 2, and the filter detected by the differential pressure detection means 8.
- the differential pressure L between the primary side and the secondary side of the second pressure reaches the differential pressure ⁇ P3 set as a predetermined pressure, more specifically, when ⁇ P3 is exceeded, the supply of the cleaning water to the cleaning water jet nozzle 6 is started. Then, the cleaning water is ejected from the cleaning water ejection nozzle 6 and the supply is stopped when the differential pressure L returns to ⁇ P3 or less, and the ejection of the cleaning water from the cleaning water ejection nozzle 6 is stopped.
- the differential pressure L does not become ⁇ P3 or less, and if it rises further, the cleaning water ejection nozzle 6 responds to the differential pressure exceeding the differential pressure ⁇ P3.
- Increase wash water jet pressure since the cleaning water is not ejected from the cleaning water ejection nozzle 6 until the differential pressure detected by the differential pressure detecting means 8 reaches a predetermined pressure, waste of the discharged amount of treated water used as the cleaning water is effective.
- the washing water jet nozzle is in accordance with the differential pressure exceeding the second predetermined pressure.
- the ejection pressure of the washing water from 6 is increased, the foreign matter deposited on the primary side of the filter 2 can be more reliably peeled off. And even if washing water is ejected from the washing water jet nozzle 6, the pressure difference does not decrease, and when the pressure rises and reaches the predetermined pressure, the ballast water treatment operation is stopped and the water in the casing 1 is stopped.
- the high pressure fluid is ejected from the high pressure fluid ejection nozzle 40 while rotating the filter 2.
- the ballast water treatment operation is stopped, the water in the casing 1 is discharged, and the high-pressure fluid is ejected from the high-pressure fluid ejection nozzle 40. Therefore, the foreign matter accumulated so that it cannot be separated from the filter 2 by the ejection of the washing water during the ballast water treatment operation can be reliably peeled off and removed from the filter 2.
- the ballast water treatment operation is stopped, the water in the casing 1 is discharged, and the high pressure fluid ejection nozzle 40 ejects the high pressure fluid. Therefore, the foreign matter accumulated so that it cannot be separated from the filter 2 by the ejection of the washing water during the ballast water treatment operation can be reliably peeled off and removed from the filter 2.
- the ballast water treatment operation is stopped, the water in the casing 1 is discharged, and the high pressure fluid is ejected from the high pressure fluid ejection nozzle 40. Therefore, the foreign matter accumulated so that it cannot be separated from the filter 2 by the ejection of the washing water during the ballast water treatment operation can be reliably peeled off and removed from the filter 2.
- the ballast water treatment operation is stopped, the water in the casing 1 is discharged, and the high-pressure fluid is ejected from the high-pressure fluid ejection nozzle 40. Therefore, the foreign matter accumulated so that it cannot be separated from the filter 2 by the ejection of the washing water during the ballast water treatment operation can be reliably peeled off and removed from the filter 2.
- the filter 2 has the function to control the rotation speed of the filter 2 based on the differential pressure detected by the differential pressure detection means 8. Based on the differential pressure detected by the differential pressure detection means 8, the detected differential pressure is made to correspond to a preset differential pressure level, and the rotational speed of the filter 2 is changed to the rotational speed corresponding to the corresponding differential pressure level. The number of rotations of the filter 2 is adjusted.
- the differential pressure detected by the differential pressure detection means 8 exceeds ⁇ P1 and further increases, the rotational speed of the filter 2 is increased stepwise according to the differential pressure set stepwise.
- the rotational speed of the filter 2 is lowered corresponding to the set pressure difference.
- the rotation of the filter 2 is returned to the rotation speed set when ⁇ P1 or less, or the rotation speed of the filter 2 is adjusted so as to stop the rotation of the filter 2.
- the suction length of the suction nozzle 4 and the cleaning water ejection length of the cleaning water ejection nozzle 6 per unit time are increased by increasing the rotation speed of the filter 2. If the amount is small, the suction length per unit time and the washing water ejection length are shortened by lowering the rotational speed of the filter 2.
- the degree of contamination of the filter 2 is determined based on the differential pressure between the primary side and the secondary side of the filter 2, and the rotational speed of the filter 2 is controlled based on the differential pressure. Therefore, the rotation of the filter 2 according to the degree of contamination
- the suction length of the suction nozzle 4 per unit time and the cleaning water jet length of the cleaning water jet nozzle 6 per unit time can be changed with respect to the number, and the foreign matter deposited on the inner peripheral surface of the filter 2 can be effectively removed in a short time. It can be removed, and the rotation of the filter 2 more than necessary can be suppressed.
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Abstract
Description
このバラスト水排出基準では、プランクトンのサイズにより、50μm以上のプランクトンは10個体/m3未満、10~50μmのプランクトンは10個体/ml未満、とそれぞれ定められており、また、細菌類については、大腸菌類250cfu/100ml未満など定められている。
また、フィルタ内外の差圧のレベル変化と、吸引ノズルと逆洗ノズルがフィルタの軸方向および周方向の両方へ移動する回数とが関連づけられていないので、効率の良い洗浄が行えず、特に、バラスト水処理装置のように、水域によって汚れが異なる水の処理や同一水域でも時間によって汚れが異なる水の処理には適さないといった問題があった。
また、吸引ノズルと逆洗ノズルを同期して旋回させながら軸方向に移動させるため複雑な機構を必要とし、製造やメンテナンスに面倒な作業を要するといった問題があった。
図1は本例の概略断面説明図、図2は吸引ノズル配置の他例を示す斜視図である。
ケーシング1内に配置された円筒状のフィルタ2は、その上部開口部が上閉止部13で密閉され、下部開口部が下閉止部14および後述する下部回転軸部材16とでケーシング1とフィルタ2の間に形成される処理水流出空間27側と隔てられている。フィルタ2にあっては、多数の穴を設けた2枚の金属薄板を円筒形に形成した支持体の間に円筒状に形成した金網などの濾過体を挟んだ構成が好ましいが、多数の穴を設けた金属薄板を円筒形に形成した支持体の外周面に濾過体を設けた構成であってもよい。
このように構成されたフィルタ2を回転させるフィルタ回転手段3は、フィルタ2の上閉止部13と下閉止部14に、フィルタ2の軸心位置に軸心方向に突設して設けた上部回転軸部材15と下部回転軸部材16と、上部回転軸部材15を回転させるモータ17とで構成されている。
下部回転軸部材16はフィルタ2内と連通する管状体となっており、ケーシング1の底部11からケーシング1の外に突出する下部回転軸部材16にケーシング1の被処理水導入口20が接続されている。被処理水導入口20には、被処理水導入路21が接続されている。被処理水導入路21には、被処理水を圧送するポンプ22と、ポンプ22の下流側に位置して開閉弁23が設けられ、開閉弁23の下流側の被処理水導入路21には、排水路24が接続され、排水路24には開閉弁25が設けられている。
ケーシング1の側部には処理水流出口26が設けられており、被処理水導入路21を流れ被処理水導入口20から導入された被処理水は下部回転軸部材16を通ってフィルタ2内に入り、フィルタ2を通過し濾過処理されてケーシング1とフィルタ2の間に形成される処理水流出空間27に入り、処理水流出口26から流出するようになっている。
洗浄汚水集合管28は、フィルタ2の軸心に配置され、上端部が閉鎖し、下端部が開口しており、上端部はフィルタ2の上閉止部13の中央に設けられた穴に軸受部材31を介して回転自在に嵌合している。また、洗浄汚水集合管28の下端部はフィルタ2の下閉止部14の下部回転軸部材16内を、フィルタ2の回転を妨げないように通り、ケーシング1の被処理水導入口20に固定されて支持されている。洗浄汚水集合管28の下端部には洗浄汚水を外部へ排出する洗浄汚水排出管29が接続されており、洗浄汚水排出管29には、運転中は常時開いている開閉弁30が備えられている。
本例では、複数の吸引ノズル4が用いられ、フィルタ2の軸方向に直線状に配置されて洗浄汚水集合管28と接続している。そして、上下に配置されている吸引ノズル4の間の未吸引部を無くすため、本例では、フィルタ2の軸方向に2列に配置され、1方の列の吸引ノズル4の間に他方の列の吸引ノズル4が位置している。具体的には、洗浄汚水集合管28の左右側に、高さ方向に交互に配置されている。
吸引ノズル4をフィルタ2の軸方向に配置する他例として、図2に示すように、複数の吸引ノズル4をフィルタ2の軸方向に、吸引ノズル4の間に未吸引部が残らない間隔で螺旋状に配置してもよい。また、フィルタ2の内周面に対向した位置でフィルタ2に向かって開口している吸引ノズル4の開口部は、フィルタ2の内周面に摺動可能に密着している。
高圧流体となる清浄水を供給する高圧流体供給手段41にあっては、タンク39と高圧流体噴出ノズル40を清浄水供給路42で接続し、タンク39に貯めてある清浄水をポンプ43で各高圧流体噴出ノズル40へ圧送するようになっている。
なお、本例では高圧流体噴出ノズル40に供給する高圧流体として清浄水が使用されているが、高圧流体が高圧エアであってもよい。この場合、高圧流体供給手段41は、エアコンプレッサ(図示しない。)により高圧エアを高圧流体噴出ノズル40に供給する。また、高圧流体が水蒸気であってもよい。
洗浄水噴出ノズル6は、フィルタ2の軸方向全域に洗浄水を噴出できることが好ましいが、その構成は特に限定されるものではない。例えば、洗浄水噴出ノズル6を、フィルタ2の軸方向に直線状および/または周方向に角度を変えて複数配置することができる。周方向に角度を変えて複数配置される洗浄水噴出ノズル6は、同じ高さに配置しても、或いは高さを変えて配置してもよい。
本例では、洗浄水噴出ノズル6は、複数配置された各吸引ノズル4と同周上に位置し、且つ、フィルタ2の回転方向に対向する方向に向かって、吸引ノズル4の前に位置するように設けられているが、各吸引ノズル4と対向するそれぞれの位置に設けられていてもよく、または、フィルタ2の回転方向に対向する方向に向かって、吸引ノズル4の後に位置するように設けられていてもよい。
なお、本例では洗浄水としてフィルタ2で処理された処理水が使用されているが、バラストタンク内に貯留された水、他の用途で使用する目的で貯留されている生活用水や飲料水などを洗浄水として使用してもよい。
フィルタ2の一次側と二次側の差圧はフィルタ2の汚れ具合を判断でき、差圧が大きい場合はフィルタ2への異物の堆積量が多くなっていることを示し、差圧が小さい場合はフィルタ2が初期状態に近い状態であることを示している。
また、所定水質にあっては、ケーシング1内に導入される被処理水の水質により推測できるフィルタ2の内周面に堆積する異物の堆積量が、吸引ノズル4の吸引では除去しきれないと判断される水質を所定水質として設定されている。水質計測手段44として、例えば、被処理水の濁度を計測する濁度計が使用される。
また、所定時間にあっては、濾過処理時間により推測できるフィルタ2の内周面に堆積する異物の堆積量が、吸引ノズル4の吸引では除去しきれないと判断される時間を所定時間として設定されている。
また、所定回数にあっては、バラスト水処理運転の運転回数により推測できるフィルタ2の内周面に堆積する異物の堆積量が、吸引ノズル4の吸引では除去しきれないと判断される回数を所定回数として設定されている。
この制御機能の一例として、差圧を増加する方向に向かってΔP1、ΔP2、ΔP3と段階的に設定し、この設定された差圧に対応してフィルタ2の回転数を増加させる方向に向かってN1、N2、N3、N4と段階的に設定し、差圧がΔP1以下の場合はフィルタ2の回転数がN1に、差圧がΔP1を超えたら回転数がN2に、差圧がΔP2を超えたら回転数がN3に、差圧がΔP3を超えたら回転数がN4になるように制御する。
また、他例として、差圧がΔP1以下の場合はフィルタ2の回転を停止させ、差圧がΔP1を超えたら回転数がN1に、差圧がΔP2を超えたら回転数がN2に、差圧がΔP3を超えたら回転数がN3になるように制御してもよい。
ここでいう第二所定圧にあっては、フィルタ2への異物の堆積量が吸引ノズル4の吸引では除去しきれないと判断される差圧を第二所定圧として設定されている。
本例では、初期差圧が記憶され、初期差圧に対して、図3に示すように、許容される差圧が設定(ΔP1)され、ΔP1以上で何段階かに差圧が設定されており、ΔP3を所定圧として設定して差圧ΔP3を超えたら洗浄水噴出ノズル6への洗浄水の供給を開始し、差圧LがΔP3以下に戻ったら供給を停止するように制御される。
また、洗浄水噴出ノズル6からの洗浄水の噴出圧力は、差圧ΔP3を超えた差圧に応じて高くなるように設定されている。
そして、洗浄汚水排出管29に備えられた開閉弁30は、運転中は常時開いており、開閉弁30の二次側の圧力は大気圧に開放されているので、洗浄汚水集合管28内の圧力がフィルタ2の二次側の圧力よりも低くなり、フィルタ2の二次側にある処理水が洗浄汚水となって洗浄汚水集合管28内に流れ、洗浄汚水排出管29から外部へ排出される。
このように、差圧検出手段8により検出された差圧が所定圧に達するまでは、洗浄水噴出ノズル6から洗浄水を噴出しないので、洗浄水として使用する処理水の排出量の無駄を効果的に抑えられ、そして、洗浄水噴出ノズル6から洗浄水が噴出しても、差圧が低下せず、さらに上昇した場合は、第二所定圧を超えた差圧に応じて洗浄水噴出ノズル6からの洗浄水の噴出圧力を高くするので、フィルタ2の一次側に堆積した異物をより確実に剥離することができる。
そして、洗浄水噴出ノズル6から洗浄水が噴出しても、差圧が低下せず、さらに上昇して差圧が所定圧に達したとき、バラスト水処理運転を停止してケーシング1内の水を排出し、フィルタ2を回転させながら高圧流体噴出ノズル40から高圧流体を噴出する。
本例では、差圧検出手段8により検出された差圧がΔP1を超え、さらに、差圧が増加する場合は、段階的に設定された差圧に応じてフィルタ2の回転数を段階的に増加させ、差圧が低下した場合は、設定された差圧に対応してフィルタ2の回転数を低下させる。差圧がΔP1以下に戻った場合はフィルタ2の回転をΔP1以下の場合に設定された回転数に戻し、或いはフィルタ2の回転を停止させるようにフィルタ2の回転数の調整を行うので、フィルタ2の内周面に堆積している異物の量が多い場合はフィルタ2の回転数を増加させることにより単位時間あたりの吸引ノズル4の吸引長、洗浄水噴出ノズル6の洗浄水噴出長が長くなり、そして、少ない場合はフィルタ2の回転数を低下させることにより単位時間あたりの吸引長、洗浄水噴出長が短くなる。
2 フィルタ
3 フィルタ回転手段
4 吸引ノズル
5 洗浄汚水排出手段
6 洗浄水噴出ノズル
8 差圧検出手段
9 制御手段
20 被処理水導入口
26 処理水流出口
28 洗浄汚水集合管
37、38 圧力センサ
40 高圧流体噴出ノズル
41 高圧流体供給手段
44 水質計測手段
45 時間計測手段
46 計数手段
Claims (8)
- 内部に流入したバラスト水を濾過処理して外部へ流出させる円筒状のフィルタをケーシング内に配置したバラスト水処理装置であって、
前記フィルタをその軸心を中心に回転させるフィルタ回転手段と、前記フィルタの一次側に設けられ、前記フィルタの内周面に向かって開口する吸引ノズルと、前記吸引ノズルで吸引した洗浄汚水を前記ケーシングから外部へ排出する洗浄汚水排出手段と、前記フィルタの二次側に設けられ、前記フィルタの外周面に向かって開口し、前記フィルタに向かって高圧流体を噴出する高圧流体噴出ノズルと、前記高圧流体噴出ノズルに高圧流体を供給する高圧流体供給手段を備えたことを特徴とするバラスト水処理装置。 - 前記フィルタの二次側に設けられ、前記フィルタの外周面に向かって開口し、前記フィルタに向かって洗浄水を噴出する洗浄水噴出ノズルを備えたことを特徴する請求項1に記載のバラスト水処理装置。
- 前記洗浄水噴出ノズルは、前記吸引ノズルと同周上に位置し、且つ、前記フィルタの回転方向に対向する方向に向かって前記吸引ノズルの前に位置するように配置されていることを特徴する請求項2に記載のバラスト水処理装置。
- 前記フィルタの一次側と二次側の差圧を検出する差圧検出手段と、前記差圧検出手段により検出された差圧に基づき前記フィルタの回転数を制御する制御手段を備えたことを特徴とする請求項1乃至3のいずれか1に記載のバラスト水処理装置。
- 前記フィルタの一次側と二次側の差圧を検出する差圧検出手段と、前記差圧検出手段により検出された差圧が所定圧に達したとき、バラスト水処理運転を停止して前記ケーシング内の水を排出し、前記高圧流体噴出ノズルから高圧流体を噴出するように制御する制御手段を備えたことを特徴とする請求項1乃至3のいずれか1に記載のバラスト水処理装置。
- 前記ケーシング内に導入される被処理水の水質を計測する水質計測手段と、前記水質計測手段により計測された水質が所定水質に達したとき、バラスト水処理運転を停止して前記ケーシング内の水を排出し、前記高圧流体噴出ノズルから高圧流体を噴出するように制御する制御手段を備えたことを特徴とする請求項1乃至3のいずれか1に記載のバラスト水処理装置。
- 濾過処理時間を計測する時間計測手段と、前記時間計測手段により計測された時間が所定時間に達したとき、バラスト水処理運転を停止して前記ケーシング内の水を排出し、前記高圧流体噴出ノズルから高圧流体を噴出するように制御する制御手段を備えたことを特徴とする請求項1乃至3のいずれか1に記載のバラスト水処理装置。
- バラスト水処理運転の運転回数を計数する計数手段と、前記計数手段により計数された運転回数が所定回数に達したとき、バラスト水処理運転を停止して前記ケーシング内の水を排出し、前記高圧流体噴出ノズルから高圧流体を噴出するように制御する制御手段を備えたことを特徴とする請求項1乃至3のいずれか1に記載のバラスト水処理装置。
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EP13897150.2A EP3067105A4 (en) | 2013-11-07 | 2013-11-07 | Ballast water treatment device |
PCT/JP2013/080160 WO2015068246A1 (ja) | 2013-11-07 | 2013-11-07 | バラスト水処理装置 |
US15/022,646 US10058806B2 (en) | 2013-11-07 | 2013-11-07 | Ballast water treatment device |
JP2015546212A JP6079898B2 (ja) | 2013-11-07 | 2013-11-07 | バラスト水処理装置 |
CN201380080009.1A CN105592905B (zh) | 2013-11-07 | 2013-11-07 | 压载水处理装置 |
KR1020167005846A KR101794038B1 (ko) | 2013-11-07 | 2013-11-07 | 선박평형수 처리장치 |
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JP2016221432A (ja) * | 2015-05-28 | 2016-12-28 | 三浦工業株式会社 | バラスト水処理装置 |
CN108117160A (zh) * | 2016-11-29 | 2018-06-05 | 中国石油化工股份有限公司 | 一种抑制菌体或污泥上浮的反应器及其应用 |
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EP3067105A4 (en) | 2017-06-28 |
US10058806B2 (en) | 2018-08-28 |
JPWO2015068246A1 (ja) | 2017-03-09 |
CN105592905A (zh) | 2016-05-18 |
US20160236122A1 (en) | 2016-08-18 |
EP3067105A1 (en) | 2016-09-14 |
JP6079898B2 (ja) | 2017-02-15 |
KR101794038B1 (ko) | 2017-11-06 |
CN105592905B (zh) | 2018-06-29 |
KR20160040681A (ko) | 2016-04-14 |
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