WO2014024618A1 - 液体濾過装置およびそれを用いたバラスト水処理装置 - Google Patents
液体濾過装置およびそれを用いたバラスト水処理装置 Download PDFInfo
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- WO2014024618A1 WO2014024618A1 PCT/JP2013/068701 JP2013068701W WO2014024618A1 WO 2014024618 A1 WO2014024618 A1 WO 2014024618A1 JP 2013068701 W JP2013068701 W JP 2013068701W WO 2014024618 A1 WO2014024618 A1 WO 2014024618A1
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- filtration
- liquid
- filtration membrane
- membrane unit
- filter
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000007788 liquid Substances 0.000 title claims abstract description 46
- 238000001914 filtration Methods 0.000 claims abstract description 167
- 239000012528 membrane Substances 0.000 claims abstract description 99
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 239000013535 sea water Substances 0.000 claims abstract description 12
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 28
- 230000005856 abnormality Effects 0.000 claims description 25
- 239000000706 filtrate Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
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- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
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- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
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- 230000004323 axial length Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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- 238000010612 desalination reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
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- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000011045 prefiltration Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6438—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D63/14—Pleat-type membrane modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
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- 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
- B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
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- 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
- B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
- B01D33/41—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in series connection
- B01D33/42—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in series connection concentrically or coaxially
-
- 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
- B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
- B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/143—Filter condition indicators
- B01D35/1435—Filter condition indicators with alarm means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/16—Rotary, reciprocated or vibrated modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/06—Specific process operations in the permeate stream
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/14—Pressure control
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- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/60—Specific sensors or sensor arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2313/70—Control means using a programmable logic controller [PLC] or a computer
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- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/90—Additional auxiliary systems integrated with the module or apparatus
- B01D2313/901—Integrated prefilter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/90—Additional auxiliary systems integrated with the module or apparatus
- B01D2313/902—Integrated cleaning device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/90—Additional auxiliary systems integrated with the module or apparatus
- B01D2313/903—Integrated control or detection device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/02—Forward flushing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/30—Mechanical cleaning, e.g. with brushes or scrapers
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Definitions
- the present invention relates to a liquid filtration apparatus provided with a filter for filtering turbid matters and the like, and more particularly, to a liquid filtration apparatus for treating seawater for use on ships and a ballast water treatment apparatus using the same.
- Patent Document 1 discloses a ballast water treatment apparatus by the present inventors.
- the apparatus is arranged in a cylinder so as to surround the axis, is provided so as to be rotatable around the axis, and has a pleated shape bent in the radial direction of the cylinder, and is processed toward the outer peripheral surface of the filter.
- This is a filtration device provided with a filtered water flow path leading out to the outside and a discharge flow path for discharging discharged water not filtered by the filter to the outside of the case.
- the apparatus described in Patent Document 1 is configured to intermittently wash the filter surface with water to be treated while performing filtration with a rotary filter. As a result, continuous high-flow filtration can be performed without particularly performing reverse cleaning.
- the place where such a device is installed in a ship is a limited space such as a ship bottom.
- the present invention provides a liquid filtration device that has a high filtration treatment capacity and can detect a breakage of a filtration membrane with a simple structure so that it can be applied to a ballast water treatment device of a large capacity ship. Objective.
- the present invention includes a filtration membrane unit, a cleaning unit that cleans a filtration surface of the filtration membrane unit from a side to which a liquid to be filtered is supplied, and a pressure detection unit that detects a differential pressure before and after filtration by the filtration membrane unit.
- the filtration membrane unit is a liquid filtration device provided with double filtration membranes.
- the filtration membrane located on the side of the doubly-configured filtration membrane to which the liquid to be filtered is supplied may be broken.
- the other filtration membrane hereinafter also referred to as “inner filtration membrane” that is doubled.
- the inner filtration membrane does not function for cleaning by the cleaning means and gradually becomes clogged. Therefore, the pressure of the liquid to be filtered gradually increases, and the abnormality can be detected by the pressure detection means.
- the cleaning means is means for ejecting the liquid to be filtered toward the filtration surface. It is preferable that the cleaning by the cleaning means and the filtration by the filtration membrane unit are performed simultaneously in parallel, so that a long-time filtration process is possible, and a high filtration capacity is provided. .
- the filtration membrane unit is a filtration membrane disposed on a cylindrical side surface, and is configured to be provided with double pleated filtration membranes having folds that repeat ridges and valleys in the radial direction of the cylindrical shape. With this configuration, the filtration area is increased, and it is possible to provide a high filtration capacity in a limited space.
- an interval in the radial direction of the cylinder of the filtration membranes provided in double is not less than 1/2 times and less than 1 times the depth of the pleated valley. This is to avoid contact between the filtration membranes as much as possible and to ensure a large space efficiency.
- the filtration membrane unit is configured to rotate about the cylindrical shaft, and the cleaning means includes a nozzle that ejects a liquid to be filtered toward the filtration surface of the filtration membrane unit. This is preferable in that it has a high filtration capacity in a limited space.
- the invention described above includes a ballast water treatment device mounted on a ship using the above-described liquid filtration device as a seawater filtration device.
- a liquid filtration device that can detect breakage of a filtration membrane or the like with a simple structure while having a high filtration treatment capacity so as to be applicable to a ballast water treatment device.
- FIG. 3 is a schematic cross-sectional view showing the AA cross-section of FIG. 2. It is a schematic diagram explaining the pleat structure of the cylindrical filter with which the liquid filtration apparatus of this invention is provided. It is a figure explaining the double filter space
- FIG. 1 is a diagram for explaining basic elements and operations of the liquid filtration device 1 of the present invention.
- the filtration membrane unit 10 is configured with the filtration membranes 11a and 11b and the support 12 supporting the membranes as basic elements, and is placed in the apparatus container 20 so as to separate the filtrate supply side and the filtrate discharge side. Yes.
- the filtration membrane unit 10 includes double filtration membranes 11a and 11b.
- FIG. 1 is a diagram for explaining basic elements and operations of the liquid filtration device 1 of the present invention.
- the filtration membrane unit 10 is configured with the filtration membranes 11a and 11b and the support 12 supporting the membranes as basic elements, and is placed in the apparatus container 20 so as to separate the filtrate supply side and the filtrate discharge side. Yes.
- the filtration membrane unit 10
- the cleaning means 3 a configuration is illustrated in which a nozzle that cleans the filtration surface with a jet is moved along the filtration surface by ejecting the liquid to be filtered toward the filtration surface.
- the to-be-filtrated liquid supplied from the to-be-filtrated liquid supply side which is the right side of a figure is filtered by permeate
- the filtered filtrate is discharged to the outside from the filtrate discharge side on the left side of the figure.
- the present apparatus is provided with a pressure detection means 2 for detecting a differential pressure between the filtrate to be filtered and the filtrate before and after filtration by the filtration membrane unit 10.
- the pressure detection means 2 includes a pressure sensor 2a that detects the pressure of the filtrate to be filtered on the filtrate supply side, a pressure sensor 2b that detects the pressure of the filtrate on the filtrate discharge side, and a differential pressure from these sensor outputs. It comprises a differential pressure detector 2c for detecting. Furthermore, it is preferable to provide a filtration membrane abnormality detection means 4 that detects the state of the filtration membrane according to the output of the differential pressure detection unit 2c.
- the differential pressure detected by the differential pressure detection unit 2c generally shows a stable value.
- an abnormality occurs in the apparatus.
- the filtration membrane 11a is gradually clogged, and the pressure on the side of the liquid to be treated is increased, so that the differential pressure detected by the differential pressure detector 2c increases.
- detection of such an increase in the differential pressure can be dealt with by checking the cleaning means and improving the capacity (for example, an increase in the water flow in FIG. 1).
- the cleaning means 3 cleans only the filtration surface of the filtration membrane 11a and does not act on the filtration membrane 11b. Therefore, turbid components and the like gradually start to accumulate on the surface of the filtration membrane 11b and gradually clog. As a result, the pressure detected by the pressure sensor 2a increases, and the value of the differential pressure in the differential pressure detector 2c increases. An abnormality can be known from the increase in the differential pressure. In such an abnormality, the increase in the differential pressure is not recovered even if the cleaning effect is improved.
- the filtration membrane abnormality detection means 4 is a detection device for determining that the filtration membrane unit is abnormal from the differential pressure information using a microcomputer or the like and notifying the outside by means such as an alarm.
- the filtration membrane abnormality detection means 4 is input with information on the set pressure on the filtered liquid side being operated and the state of the cleaning means. It may be programmed to determine that the differential pressure abnormality is an abnormality of the filter membrane by taking an AND between the fact that the differential pressure is increasing and that there is no change in the set pressure or the cleaning means. As described above, even when an abnormality such that turbid components or the like permeate through the filtration membrane occurs, it is an advantage of the present invention that the abnormality can be found while the filtration proceeds normally.
- the pressure sensor detects the differential pressure by providing the pressure sensor on the filtrate side and the filtrate side, but this configuration is not necessarily required.
- the pressure sensor may be only on the filtrate side.
- the pressure on the liquid to be filtered side may be handled as a differential pressure.
- the number of pressure sensors is not limited to one, and a method such as taking an average of a plurality of pressure sensors can be employed. Further, it is possible to artificially determine an abnormality from the output value from the pressure sensor or the differential pressure output value from the differential pressure detector 2c without providing the filtration membrane abnormality detection means 4.
- FIGS. 2 and 3 are schematic diagrams illustrating a typical configuration example of a rotary filter filtering device as a filtering unit.
- FIG. 2 shows a longitudinal section of the rotary filter filtration device
- FIG. 3 shows an AA transverse section in FIG.
- the cylindrical filtration membrane unit 10 is disposed so as to surround an axis C serving as a rotation center, and is rotatably attached around a central pipe 43 (pipe does not rotate) disposed at the center.
- the filtration membrane unit 10 includes a cylindrical filtration membrane on the cylindrical side surface with the upper lid member 21 and the bottom lid member 22 as main supports. As shown in FIG.
- the filtration membrane has a double structure of a filtration membrane 11a located outside the cylinder and a filtration membrane 11b located inside the cylinder.
- a pleated filter shown in a perspective view in FIG. 4 is preferably used.
- the pleated filter is obtained by continuously folding a filtration membrane so as to repeat peaks and valleys in the radial direction of the cylinder, and a large filtration area can be obtained.
- the upper and lower surfaces of the filter are watertightly closed by the upper lid member 21 and the bottom lid member 22.
- the bottom lid member is rotatable with respect to the central pipe 43 by the watertight bearing 25.
- the upper lid member is provided with a rotation shaft 24.
- the rotating shaft 24 is connected to a motor 50, and the entire filtration membrane unit 10 is rotated by driving the motor 50.
- a case 30 is provided so as to cover the entire filtration membrane unit 10.
- the case 30 includes an outer cylinder portion 31, a lid portion 32, and a bottom portion 33, and a drain water flow path 46 is provided in the bottom portion 33.
- a water channel 41 to be treated for introducing seawater as water to be treated into the case 30 and a water nozzle 42 to be treated for spraying the water to be treated in the direction of the filtration surface of the filtration membrane 11a are provided.
- the to-be-treated water nozzle 42 extends from the to-be-treated water flow path 41 so that the nozzle opening is provided in the outer cylindrical portion 31 of the case 30.
- the water to be treated ejected from the water nozzle for treatment 42 hits the outer peripheral surface of the filtration membrane 11a, and the effect of cleaning the filtration surface is obtained by the pressure.
- the filtration membrane unit 10 is rotated by the motor 50, the cleaning part moves sequentially, and the entire filtration surface can be cleaned.
- the number of rotations of the motor 50 may be constant, or may be arbitrarily determined manually.
- the turbidity of filtered water, the pressure difference between the inside and outside of the filter, etc. can be detected and controlled according to the state of filtration. preferable.
- the treated water that has not been filtered and the turbid components that have settled in the case are sequentially discharged from the drain water flow path 46 at the bottom of the case.
- the characteristic of this device is that the turbid component and the remaining treated water are continuously discharged while being continuously discharged, and is characterized by 10 to 20 tons / hour required for ballast water, and further 100 tons / hour. It is effective to secure a processing amount exceeding.
- the filtered water filtered by the filtration membrane unit 10 is guided to the filtered water flow path 45 through the filtered water opening 44 provided in the central pipe 43 and led out of the case.
- a porous resin sheet is used as the base material of the filtration membrane.
- a porous structure such as a stretched porous body, a phase-separated porous body, or a nonwoven fabric made of polyester, nylon, polyethylene, polypropylene, polyurethane, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), etc. is used. Is done.
- a non-woven fabric made of polyester such as polyethylene terephthalate is particularly preferably used because a high flow rate treatment is performed.
- the outer diameter of the pleated filter is 700 mm
- the axial length is 320 mm
- the height as an effective area is 280 mm
- the pleat depth is 70 mm
- the number of pleats is 420 folds. It is possible to change the area or use a plurality of filters in parallel.
- FIG. 5 is a diagram for explaining the double filter interval in the structure of FIG.
- the filtration membrane 11a and the filtration membrane 11b that are doubled are both pleated filters having the same shape.
- the depth between the peaks and valleys of one pleat filter is L (mm), and the interval between the two pleat filters that are doubled is expressed as d (mm).
- the double filtration membrane interval is arbitrary.
- a cylindrical pleated filter is used as a filtration membrane, there are restrictions on the configuration.
- the crest distance d which is the distance between the double filtration membranes, is 1 ⁇ 2 times or more and less than 1 time of the crevice depth L, that is, 0.5L ⁇ d ⁇ L.
- the circle of the filtration membrane 11b inside the cylinder becomes small, and the area of the filtration surface cannot be secured sufficiently.
- the outer filtration membrane 11a is torn, clogging is likely to occur, and the function as a backup is hardly exhibited. If it is less than 1/2 times, the plane spacing between the pleated filters becomes too close.
- the filtration surface is fixed by the support, the surface is always deformed by rotation and a jet of washing water. When the distance between the filtration membranes is short, the deformation membrane is likely to come into contact with the deformation, and inconveniences such as breakage due to surface rubbing or the like are likely to occur.
- FIG. 6 shows a block diagram of a system configuration example in which the liquid filtration device described above is used as a ballast water treatment device.
- the system shown in FIG. 6 is mounted on a ship, and seawater is filtered and stored.
- Many ballast water treatment apparatuses are composed of a filtration unit and a sterilization unit using means such as ultraviolet rays, and the present invention can be applied as a filtration unit.
- Seawater is taken into the apparatus from the ocean outside the ship through the intake channel 47 by the action of the pump 110.
- the liquid filtration device 100 is a liquid filtration device that performs filtration while rotating a cylindrical filter having a filtration surface disposed on a side surface of a cylinder as described above.
- Seawater sent to the liquid filtration device 100 through the to-be-treated water channel 41 is divided into filtered water and discharged water.
- the discharged water is returned to the ocean again through the discharged water channel 46, and the filtered water is sent to the filtered water channel 45.
- the filtered water is then sterilized with microorganisms by the ultraviolet irradiation device 120 and stored in the ballast water tank 130 through the tank channel 48.
- the means of the sterilization unit is exemplified by the ultraviolet irradiation device 120, but may be replaced with other known means such as using a medicine.
- Ballast water treatment requires a large amount of seawater to be treated in as short a time as possible, so it is required to increase the size of the filter and continuously wash it. In addition, it is necessary to identify abnormal conditions and take appropriate measures. According to the device of the invention, it can be realized with a relatively simple structure.
- the liquid filtration device of the present invention can be continuously operated with a stable high permeation flow rate by rotary cleaning. Therefore, it is suitable for pre-filtration treatment that removes foreign substances, dust, and microorganisms in water, especially when using brackish water and seawater such as seawater desalination and ballast water, or when treating sewage, domestic wastewater, industrial wastewater, etc., especially when the amount of treated water is large.
- pre-filtration treatment that removes foreign substances, dust, and microorganisms in water, especially when using brackish water and seawater such as seawater desalination and ballast water, or when treating sewage, domestic wastewater, industrial wastewater, etc., especially when the amount of treated water is large.
- brackish water and seawater such as seawater desalination and ballast water
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
2 圧力検出手段
2a,2b 圧力センサ
2c 差圧検出部
3 洗浄手段
4 濾過膜異常検知手段
10 濾過膜ユニット
11a,11b 濾過膜
12 支持体
20 装置容器
21 上蓋部材
22 底蓋部材
24 回転軸
25 軸受け
30 ケース
31 ケース外筒部
32 ケース蓋部
33 ケース底部
41 被処理水流路
42 被処理水ノズル
43 中心配管
44 濾過水開口
45 濾過水流路
46 排出水流路
47 取水流路
48 タンク流路
50 モーター
100 液体濾過装置
110 ポンプ
120 紫外線照射装置
130 バラスト水タンク
Claims (7)
- 濾過膜ユニットと、該濾過膜ユニットの濾過面を被濾過液が供給される側から洗浄する洗浄手段と、前記濾過膜ユニットによる濾過前後の差圧を検出する圧力検出手段とを備え、前記濾過膜ユニットは濾過膜を二重に備えている液体濾過装置。
- 前記洗浄手段は、前記濾過面に向けて被濾過液を噴出する手段であり、前記洗浄手段による洗浄と、前記濾過膜ユニットによる濾過とが、同時並行に行われるように構成されている、請求項1に記載の液体濾過装置。
- 前記濾過膜ユニットは、円筒形状側面に配置された濾過膜であって、該円筒形状の半径方向に山谷を繰り返す折り目を備えたプリーツ形状の濾過膜を二重に備える、請求項1または2に記載の液体濾過装置。
- 二重に備えられた前記濾過膜の円筒半径方向の間隔が、前記プリーツ形状の山谷間深さの1/2倍以上1倍未満である、請求項3に記載の液体濾過装置。
- 前記濾過膜ユニットが、前記円筒形状の軸を中心に回転するように構成されており、前記洗浄手段は、前記濾過膜ユニットの濾過面に向けて被濾過液を噴出する被処理水ノズルを備える、請求項3または4に記載の液体濾過装置。
- 前記圧力検出手段により検出された差圧の増加により、前記濾過膜の異常を検出する濾過膜異常検知手段をさらに備えた、請求項1~5のいずれか1項に記載の液体濾過装置。
- 請求項1~6のいずれか1項に記載の液体濾過装置を海水の濾過装置として用い、船舶に搭載されるバラスト水処理装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13828460.9A EP2883845A4 (en) | 2012-08-09 | 2013-07-09 | LIQUID FILTER DEVICE AND BALLAST WATER TREATMENT DEVICE USING THE SAME |
US14/419,976 US20150224426A1 (en) | 2012-08-09 | 2013-07-09 | Liquid filtering device and ballast water treatment apparatus |
KR20157003111A KR20150040288A (ko) | 2012-08-09 | 2013-07-09 | 액체 여과 장치 및 그것을 이용한 밸러스트수 처리 장치 |
Applications Claiming Priority (2)
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JP2012-176562 | 2012-08-09 | ||
JP2012176562A JP6019909B2 (ja) | 2012-08-09 | 2012-08-09 | 液体濾過装置およびそれを用いたバラスト水処理装置 |
Publications (1)
Publication Number | Publication Date |
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WO2014024618A1 true WO2014024618A1 (ja) | 2014-02-13 |
Family
ID=50067858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2013/068701 WO2014024618A1 (ja) | 2012-08-09 | 2013-07-09 | 液体濾過装置およびそれを用いたバラスト水処理装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20150224426A1 (ja) |
EP (1) | EP2883845A4 (ja) |
JP (1) | JP6019909B2 (ja) |
KR (1) | KR20150040288A (ja) |
CN (1) | CN203678077U (ja) |
WO (1) | WO2014024618A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4835785B2 (ja) | 2010-02-25 | 2011-12-14 | 住友電気工業株式会社 | 船舶用バラスト水の処理装置 |
EP2939724A4 (en) * | 2012-12-27 | 2016-08-24 | Sumitomo Electric Industries | WASTEWATER TREATMENT DEVICE AND WASTE TREATMENT METHOD FOR WASTEWATER TREATMENT DEVICE |
JP6395046B2 (ja) * | 2014-12-03 | 2018-09-26 | 三浦工業株式会社 | バラスト水処理装置およびバラスト水処理装置におけるフィルタ洗浄方法 |
CN107560015B (zh) * | 2017-08-14 | 2020-06-02 | 中国联合网络通信集团有限公司 | 一种加湿过滤装置及其清洗方法、新风系统 |
CN107694341A (zh) * | 2017-09-27 | 2018-02-16 | 江苏新宇天成环保有限公司 | 一种星型固液分滤机及分滤方法 |
KR102010986B1 (ko) * | 2018-01-24 | 2019-08-14 | 광주과학기술원 | 무전력 정수 장치 및 이의 작동방법 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0226605A (ja) * | 1988-07-14 | 1990-01-29 | Hitachi Ltd | 微粒子除去エアフィルタ |
JPH0551323B2 (ja) * | 1985-01-16 | 1993-08-02 | Yuasa Battery Co Ltd | |
JP2006000798A (ja) * | 2004-06-21 | 2006-01-05 | Kanai Hiroaki | イオン交換フィルタ |
WO2008053826A1 (en) * | 2006-10-31 | 2008-05-08 | Kurita Water Industries Ltd. | Method of increasing purity of ultrapure water and apparatus therefor |
WO2010151447A1 (en) * | 2009-06-23 | 2010-12-29 | 3M Innovative Properties Company | Functionalized nonwoven article |
JP2011005456A (ja) * | 2009-06-29 | 2011-01-13 | Horyo Corp | フィルタ装置 |
JP2011194396A (ja) * | 2010-02-25 | 2011-10-06 | Sumitomo Electric Ind Ltd | 船舶用バラスト水の処理装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE935424C (de) * | 1949-01-04 | 1955-11-17 | Rhein Emscher Armaturenfabrik | Rueckspuelbares Siebfilter mit senkrecht in einem Gehaeuse angeordneten Siebtrommeln aus Drahtgewebe fuer Fluessigkeiten oder Gase |
JPS5412907B2 (ja) * | 1974-03-06 | 1979-05-26 | ||
US4038187A (en) * | 1976-02-03 | 1977-07-26 | Envirex Inc. | Microscreen drum |
JPH0672614U (ja) * | 1993-03-19 | 1994-10-11 | 山信工業株式会社 | フィルタエレメント |
JP4421494B2 (ja) * | 2005-02-17 | 2010-02-24 | 三井造船株式会社 | バラスト水の取水・処理装置 |
JP4960612B2 (ja) * | 2005-08-04 | 2012-06-27 | 三井造船株式会社 | 膜処理装置 |
-
2012
- 2012-08-09 JP JP2012176562A patent/JP6019909B2/ja not_active Expired - Fee Related
-
2013
- 2013-07-09 US US14/419,976 patent/US20150224426A1/en not_active Abandoned
- 2013-07-09 WO PCT/JP2013/068701 patent/WO2014024618A1/ja active Application Filing
- 2013-07-09 EP EP13828460.9A patent/EP2883845A4/en not_active Withdrawn
- 2013-07-09 KR KR20157003111A patent/KR20150040288A/ko not_active Application Discontinuation
- 2013-08-09 CN CN201320487453.2U patent/CN203678077U/zh not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0551323B2 (ja) * | 1985-01-16 | 1993-08-02 | Yuasa Battery Co Ltd | |
JPH0226605A (ja) * | 1988-07-14 | 1990-01-29 | Hitachi Ltd | 微粒子除去エアフィルタ |
JP2006000798A (ja) * | 2004-06-21 | 2006-01-05 | Kanai Hiroaki | イオン交換フィルタ |
WO2008053826A1 (en) * | 2006-10-31 | 2008-05-08 | Kurita Water Industries Ltd. | Method of increasing purity of ultrapure water and apparatus therefor |
WO2010151447A1 (en) * | 2009-06-23 | 2010-12-29 | 3M Innovative Properties Company | Functionalized nonwoven article |
JP2011005456A (ja) * | 2009-06-29 | 2011-01-13 | Horyo Corp | フィルタ装置 |
JP2011194396A (ja) * | 2010-02-25 | 2011-10-06 | Sumitomo Electric Ind Ltd | 船舶用バラスト水の処理装置 |
JP4835785B2 (ja) | 2010-02-25 | 2011-12-14 | 住友電気工業株式会社 | 船舶用バラスト水の処理装置 |
Also Published As
Publication number | Publication date |
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JP6019909B2 (ja) | 2016-11-02 |
EP2883845A1 (en) | 2015-06-17 |
EP2883845A4 (en) | 2016-05-25 |
JP2014034002A (ja) | 2014-02-24 |
KR20150040288A (ko) | 2015-04-14 |
CN203678077U (zh) | 2014-07-02 |
US20150224426A1 (en) | 2015-08-13 |
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