WO2016152336A1 - 濾過ユニット - Google Patents
濾過ユニット Download PDFInfo
- Publication number
- WO2016152336A1 WO2016152336A1 PCT/JP2016/054631 JP2016054631W WO2016152336A1 WO 2016152336 A1 WO2016152336 A1 WO 2016152336A1 JP 2016054631 W JP2016054631 W JP 2016054631W WO 2016152336 A1 WO2016152336 A1 WO 2016152336A1
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- WIPO (PCT)
- Prior art keywords
- hollow fiber
- filtration
- filtration unit
- fiber membrane
- fiber membranes
- Prior art date
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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
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/04—Hollow fibre modules comprising multiple hollow fibre assemblies
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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
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
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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
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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
- B01D2313/12—Specific discharge elements
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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
- B01D2313/26—Specific gas distributors or gas intakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2315/00—Details relating to the membrane module operation
- B01D2315/06—Submerged-type; Immersion type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2319/00—Membrane assemblies within one housing
- B01D2319/04—Elements in parallel
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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
- B01D2321/18—Use of gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Definitions
- the present invention relates to a filtration unit.
- a filtration unit having a filtration module in which a plurality of hollow fiber membranes are converged is used as a solid-liquid separation treatment apparatus in a manufacturing process of sewage treatment or medicine.
- Such a filtration unit is used by being immersed in a liquid to be treated.
- the hollow fiber membrane surface prevents penetration of impurities contained in the liquid to be treated, and allows filtration treatment by allowing other impurities to permeate inside.
- Such a filtration unit includes, for example, a plurality of hollow fiber membranes aligned in the vertical direction and a water collecting unit communicating with the upper openings of these hollow fiber membranes, as described in JP 2013-56346 A
- a plurality of filtration modules having (water collecting header) are provided.
- Such a filtration unit collects filtered liquid that has permeated through a plurality of hollow fiber membranes in a water collecting section, and connects the filtered liquid collected in the water collecting section to the central portion of the upper wall of the water collecting section. It is configured to be removable via a water pipe.
- a plurality of hollow fiber membranes are densely arranged. Further, in a conventional filtration unit, usually, a plurality of filtration modules themselves are densely arranged. Therefore, in such a conventional filtration unit, it is not easy to wash the vicinity of the center of a bundle of a plurality of hollow fiber membranes.
- the present invention has been made based on such circumstances, and an object of the present invention is to provide a filtration unit capable of improving the efficiency of washing the hollow fiber membrane.
- a filtration unit made to solve the above problems includes a plurality of hollow fiber membranes arranged in a vertical direction and arranged in a plate shape, and upper openings of these hollow fiber membranes.
- a plurality of filtration modules having a linear first water collection section that communicates and through which the filtered liquid that has passed through each hollow fiber membrane flows, and a plurality of filtration modules that communicate with the plurality of first water collection sections of the plurality of filtration modules.
- a plurality of filtration modules wherein the plurality of filtration modules are arranged in two rows and each row is formed in a stripe shape, and the water distribution pipes are a plurality of second filtration modules of the plurality of filtration modules constituting each row. It has two merging pipes that communicate with the outer end of one water collecting section via a first coupling pipe and are arranged in parallel.
- the filtration unit of the present invention can improve the efficiency of washing the hollow fiber membrane.
- FIG. 1 It is a typical perspective view showing the filtration unit concerning one embodiment of the present invention. It is a figure which shows the positional relationship of the filtration module which adjoins in each row
- a filtration unit communicates with a plurality of hollow fiber membranes arranged in a vertical direction and arranged in a plate shape, and upper openings of these hollow fiber membranes, in each hollow fiber membrane.
- a filtration unit comprising a plurality of filtration modules having a linear first water collection section through which a filtered filtered liquid that has permeated flows, and water pipes communicating with the plurality of first water collection sections of the plurality of filtration modules.
- the plurality of filtration modules are arranged in two rows and each row is arranged in stripes, and the water distribution pipes are arranged at outer end portions of the plurality of first water collecting portions of the plurality of filtration modules constituting each row. There are two merging pipes that communicate with each other through the first coupling pipe and are arranged in parallel.
- the filtration unit since the water distribution pipe communicates with the outer end portions of the plurality of first water collecting portions, the availability of the hollow fiber membrane communicating with the vicinity of the outer end portion of the first water collecting portion tends to increase. Therefore, in the filtration unit, the hollow fiber membrane communicating with the vicinity of the outer end portion of the first water collecting portion is likely to become dirty.
- the hollow fiber membrane that is easily contaminated is disposed outside the filtration module. For example, even when a plurality of filtration modules are disposed in the filtration unit, dirt is easily attached. The hollow fiber membrane can be easily washed. Therefore, the said filtration unit can improve the efficiency of washing
- the filtration module communicates with the lower openings of the plurality of hollow fiber membranes, and has a linear second water collecting portion through which the filtered liquid that has permeated the hollow fiber membranes flows. It is good to have a some 2nd coupling pipe connected between the outside edge part of the 1st water collection part of a filtration module, and the outside edge part of the 2nd water collection part.
- the water distribution pipe has a plurality of second coupling pipes communicating between the outer end of the first water collecting part and the outer end of the second water collecting part of each filtration module, thereby providing the first.
- the filtered liquid can be taken out from the second water collecting part, and the efficiency of the filtration process can be promoted.
- the second coupling pipe communicates with the first water collecting part, the filtered liquid collected by the second water collecting part is taken out using the same path as the filtered liquid collected by the first water collecting part. Therefore, the number of members can be reduced, the structure can be simplified, and the cost can be reduced.
- the water distribution pipe has a water intake pipe communicating with the two merging pipes.
- the extraction efficiency of the filtered liquid can be increased by having the water intake pipe communicating with the two merge pipes.
- a ventilation mechanism for pumping the gas to the gas diffusers.
- a plurality of guide mechanisms are provided between the plurality of diffusion tubes and the plurality of filtration modules and guide the gas discharged from the plurality of diffusion tubes between the plurality of filtration modules.
- a plurality of guide mechanisms for guiding the gas discharged from the plurality of diffusion tubes between the plurality of filtration modules, impurities adhering to the plurality of hollow fiber membrane surfaces can be more easily and reliably removed. Can do.
- the guide mechanism may be configured to intermittently discharge bubbles. As described above, since the guide mechanism is configured to intermittently discharge bubbles, impurities adhering to the surfaces of the plurality of hollow fiber membranes can be more efficiently removed.
- the filtration unit may include a cover that surrounds the vertical direction of the filtration unit.
- a cover that surrounds the vertical direction of the filtration unit.
- the said filtration unit is immersed and used for a to-be-processed liquid.
- the filtration unit mainly includes a plurality of filtration modules 1, a water distribution pipe 2, a plurality of air diffusion pipes 3, a ventilation mechanism 4, and a plurality of guide mechanisms 5.
- the filtration unit includes a plurality of frames 6a to 6h that form a support structure for the filtration unit.
- the plurality of frames 6a to 6h forming the support structure of the filtration unit are arranged in the vertical direction, and each pair of front vertical frame 6a and rear vertical frame 6b forming the four corners of the support structure in plan view, Each pair of front side horizontal frames 6c, rear side horizontal frames 6d, and right side horizontal frames arranged in a rectangular shape in plan view and suspended between the upper and lower portions of each pair of front vertical frame 6a and rear vertical frame 6b.
- a frame 6e and a left lateral frame 6f are included.
- the plurality of frames 6a to 6h include a pair of support frames 6g suspended between the axial centers of the pair of front lateral frames 6c and the axial centers of the pair of rear lateral frames 6d.
- the plurality of frames 6a to 6h include a plurality of pairs of module support frames 6h that are disposed between the right lateral frame 6e and the left lateral frame 6f and support the plurality of filtration modules 1 from the upper side and the lower side.
- the plurality of filtration modules 1 includes a plurality of hollow fiber membranes 11 that are aligned in a vertical direction and arranged in a plate shape, and a plurality of hollow fiber membranes 11.
- Each of the hollow fiber membranes 11 is connected to the linear first water collecting portion 12 through which the filtered liquid permeated and the lower openings of the plurality of hollow fiber membranes 11 are communicated.
- a linear second water collection portion 13 through which the filtered liquid permeated in the membrane 11 flows.
- the plurality of filtration modules 1 are arranged in two rows and each row in a stripe shape.
- the existence region A in a plan view of the plurality of hollow fiber membranes 11 constituting one filtration module 1 is a rectangular shape, and the plurality of filtration modules 1.
- the several filtration module 1 is arrange
- the several filtration module 1 is arrange
- column is made into stripe form by the space which exists between the several filtration module 1 and the several filtration module 1.
- the “existing region A” means a virtual polygon having the smallest area among the virtual polygons including all the hollow fiber membranes 11 included in one filtration module 1 when viewed from the axial direction.
- the plurality of hollow fiber membranes 11 are preferably arranged in a matrix in the long side direction and short side direction of the existence region A.
- the hollow fiber membrane 11 is formed by forming a porous membrane into a tubular shape that allows water to permeate while preventing permeation of impurities contained in the liquid to be treated.
- thermoplastic resin examples include polyethylene, polypropylene, polyvinylidene fluoride, ethylene-vinyl alcohol copolymer, polyamide, polyimide, polyetherimide, polystyrene, polysulfone, polyvinyl alcohol, polyphenylene ether, polyphenylene sulfide, cellulose acetate, and polyacrylonitrile.
- PTFE polytetrafluoroethylene
- PTFE which is excellent in chemical resistance, heat resistance, weather resistance, nonflammability and the like and is porous is preferable, and uniaxially or biaxially stretched PTFE is more preferable.
- other polymers, additives, such as a lubricant, etc. may be suitably mix
- the lower limit of the ratio (L 2 / L 1 ) of the average length L 2 in the short side direction to the average length L 1 in the long side direction of the existence region A is preferably 1/80, more preferably 1/50.
- the upper limit of the ratio of the average length L 2 relative to the mean length L 1 (L 2 / L 1) preferably 1/3, 1/10 is more preferable. If the ratio of the average length L 2 relative to the mean length L 1 (L 2 / L 1) is less than the above lower limit, the handling of the filtration module 1 may become difficult.
- the lower limit of the average distance between the existing areas A of the filtration modules 1 adjacent to each other in each row is preferably 10 mm, and more preferably 15 mm.
- the upper limit of the average interval between the existing regions A is preferably 30 mm, and more preferably 25 mm. If the average interval between the existence regions A is less than the lower limit, it may be difficult to accurately introduce gas discharged from the diffuser 3 described later between the filtration modules 1. On the other hand, when the average interval between the existence regions A exceeds the upper limit, the existence density of the filtration module 1 may be reduced and the filtration efficiency may be reduced.
- the average pitch P 1 in the long side direction of the hollow fiber membrane 11 is preferably larger than the average pitch P 2 in the short side direction.
- the lower limit of the ratio (P 2 / P 1 ) of the average pitch P 2 in the short side direction to the average pitch P 1 in the long side direction of the hollow fiber membrane 11 is preferably 2/5, and more preferably 1/2.
- the upper limit of the ratio (P 2 / P 1 ) of the average pitch P 2 in the short side direction to the average pitch P 1 in the long side direction of the hollow fiber membrane 11 is preferably 4/5, and 2/3. More preferred.
- the ratio (P 2 / P 1 ) is less than the lower limit, the density of the hollow fiber membrane 11 in the long side direction becomes small, and sufficient filtration efficiency may not be obtained.
- the ratio (P 2 / P 1 ) exceeds the upper limit, the gas discharged from the air diffuser 3 may not be sufficiently introduced between the hollow fiber membranes 11 from one end side in the short side direction.
- the lower limit of the filling area ratio of the hollow fiber membrane 11 in the existence region A is preferably 20%, and more preferably 30%.
- the upper limit of the filling area ratio of the hollow fiber membrane 11 in the existence region A is preferably 60%, and more preferably 55%. If the filling area ratio of the hollow fiber membrane 11 is less than the lower limit, the number of the hollow fiber membranes 11 per unit area is reduced, and sufficient filtration efficiency may not be obtained. On the contrary, when the filling area ratio of the hollow fiber membrane 11 exceeds the upper limit, the gap between the hollow fiber membranes 11 becomes excessively small, and the gas discharged from the air diffuser 3 is transferred to the center of the bundle of the hollow fiber membranes 11. May not be able to supply enough.
- the upper limit of the number of the hollow fiber membranes 11 arranged in the short side direction is preferably 50, more preferably 40. If the number of the hollow fiber membranes 11 arranged in the short side direction is less than the lower limit, it may be impossible to sufficiently secure the filtration efficiency per unit area. On the contrary, if the number of the hollow fiber membranes 11 arranged in the short side direction exceeds the upper limit, there is a possibility that the gas discharged from the air diffuser 3 cannot be accurately supplied to the center of the bundle of the hollow fiber membranes 11. .
- the average pitch lower limit of the ratio of P 2 average over outer diameter of the short-side direction of the hollow fiber membrane 11, 1 is preferable.
- the upper limit of the ratio of the mean average of the short-side direction relative to the outer diameter pitch P 2 of the hollow fiber membrane 11 is preferably 3/2, 7/5 is more preferable.
- the ratio of the mean average outside the relative radial short side direction pitch P 2 of the hollow fiber membrane 11 is less than the above lower limit, it means that the hollow fiber membranes 11 are arranged in a state of being crushed radially filtration The module 1 may be difficult to manufacture.
- the ratio of the average mean of the short-side direction relative to the outer diameter pitch P 2 of the hollow fiber membrane 11 exceeds the upper limit, sufficient filtration efficiency by the density of the short-side direction of the hollow fiber membrane 11 is reduced May not be obtained.
- the lower limit of the average outer diameter of the hollow fiber membrane 11 is preferably 1 mm, more preferably 1.5 mm, and even more preferably 2 mm.
- the upper limit of the average outer diameter of the hollow fiber membrane 11 is preferably 6 mm, more preferably 5 mm, and even more preferably 4 mm. If the average outer diameter of the hollow fiber membrane 11 is less than the lower limit, the mechanical strength of the hollow fiber membrane 11 may be insufficient. On the contrary, when the average outer diameter of the hollow fiber membrane 11 exceeds the above upper limit, the hollow fiber membrane 11 becomes insufficient in flexibility and vibration and peristalsis of the hollow fiber membrane 11 due to gas contact become insufficient.
- the lower limit of the average inner diameter of the hollow fiber membrane 11 is preferably 0.3 mm, more preferably 0.5 mm, and even more preferably 0.9 mm.
- the upper limit of the average inner diameter of the hollow fiber membrane 11 is preferably 4 mm, and more preferably 3 mm. If the average inner diameter of the hollow fiber membrane 11 is less than the above lower limit, the pressure loss when the filtered liquid in the hollow fiber membrane 11 is discharged may increase. On the other hand, if the average inner diameter of the hollow fiber membrane 11 exceeds the above upper limit, the thickness of the hollow fiber membrane 11 becomes small, and the mechanical strength and the impurity permeation preventing effect may be insufficient.
- the lower limit of the ratio of the average inner diameter to the average outer diameter of the hollow fiber membrane 11 is preferably 3/10, and more preferably 2/5.
- the upper limit of the ratio of the average inner diameter to the average outer diameter of the hollow fiber membrane 11 is preferably 4/5, and more preferably 3/5. If the ratio of the average inner diameter to the average outer diameter of the hollow fiber membrane 11 is less than the above lower limit, the thickness of the hollow fiber membrane 11 becomes larger than necessary, and the water permeability of the hollow fiber membrane 11 may be lowered.
- the thickness of the hollow fiber membrane 11 may be reduced, and the mechanical strength and the impurity permeation preventing effect may be insufficient.
- the lower limit of the average effective length L 3 of the hollow fiber membrane 11, 1 m are preferred, 2m is more preferable.
- the upper limit of the average effective length L 3 of the hollow fiber membrane 11, 6 m are preferred, 5m is more preferable. If the average effective length L 3 of the hollow fiber membrane 11 is less than the above lower limit, swinging the hollow fiber membranes 11 by abrasion of the gas becomes insufficient, the hollow gas by expanding the gap between the hollow fiber membranes 11 fiber membranes 11 There is a possibility that it cannot be guided to the center of the bundle.
- the “average effective length of the hollow fiber membrane” refers to the axial length of the portion disposed between the lower end of the first water collection unit 12 and the upper end of the second water collection unit 13.
- the lower limit of the average effective length ratio of L 3 to the average outer diameter of the hollow fiber membranes 11 is more preferable.
- the upper limit of the aspect ratio of the hollow fiber membrane 11 is preferably 6000, and more preferably 5000. If the aspect ratio of the hollow fiber membrane 11 is less than the above lower limit, the perforation of the hollow fiber membrane 11 due to gas scrubbing becomes insufficient, the gap between the hollow fiber membranes 11 is widened, and the gas is centered in the bundle of the hollow fiber membranes 11. May not be able to guide to the department. On the contrary, if the aspect ratio of the hollow fiber membrane 11 exceeds the above upper limit, the hollow fiber membrane 11 becomes extremely long and the mechanical strength when stretched up and down may be lowered.
- the porosity of hollow fiber membrane 11 As a minimum of the porosity of hollow fiber membrane 11, 70% is preferred and 75% is more preferred.
- the upper limit of the porosity of the hollow fiber membrane 11 is preferably 90%, more preferably 85%. If the porosity of the hollow fiber membrane 11 is less than the above lower limit, the water permeability is lowered and the filtration ability of the filtration module 1 may be lowered. On the contrary, when the porosity of the hollow fiber membrane 11 exceeds the upper limit, the mechanical strength and scratch resistance of the hollow fiber membrane 11 may be insufficient.
- the porosity refers to the ratio of the total volume of pores to the volume of the hollow fiber membrane 11, and can be determined by measuring the density of the hollow fiber membrane 11 in accordance with ASTM-D-792.
- the lower limit of the area occupation ratio of the pores of the hollow fiber membrane 11 is preferably 40%.
- the upper limit of the area occupancy ratio of the holes of the hollow fiber membrane 11 is preferably 60%. If the area occupancy rate of the pores is less than the lower limit, the water permeability is lowered and the filtration ability of the filtration module 1 may be lowered. On the other hand, when the area occupation ratio of the holes exceeds the upper limit, the surface strength of the hollow fiber membrane 11 becomes insufficient, and the hollow fiber membrane 11 may be damaged due to gas scrubbing.
- the “area occupation ratio of the pores” means the ratio of the total area of the pores on the outer peripheral surface of the hollow fiber membrane 11 to the surface area of the hollow fiber membrane 11, and an electron micrograph of the outer peripheral surface of the hollow fiber membrane 11. Can be obtained by analyzing.
- the lower limit of the average pore diameter of the hollow fiber membrane 11 is preferably 0.01 ⁇ m.
- the upper limit of the average diameter of the pores of the hollow fiber membrane 11 is preferably 0.45 ⁇ m, and more preferably 0.1 ⁇ m. If the average diameter of the pores of the hollow fiber membrane 11 is less than the above lower limit, the water permeability may be lowered. Conversely, if the average diameter of the pores of the hollow fiber membrane 11 exceeds the above upper limit, there is a possibility that the permeation of impurities contained in the liquid to be treated into the hollow fiber membrane 11 cannot be accurately prevented.
- the average diameter of the pores means the average diameter of the pores on the outer peripheral surface of the hollow fiber membrane 11, and is a pore diameter distribution measuring device (for example, “Porous Material Automatic Porous Material Distribution Measurement System”). ).
- the tensile strength of hollow fiber membrane 11 As a minimum of the tensile strength of hollow fiber membrane 11, 50N is preferred and 60N is more preferred. If the tensile strength of the hollow fiber membrane 11 is less than the lower limit, the durability against surface cleaning with bubbles may be reduced. On the other hand, the upper limit of the tensile strength of the hollow fiber membrane 11 is generally 150N.
- the tensile strength means the maximum tensile stress when a tensile test is conducted at a distance between marked lines of 100 mm and a test speed of 100 mm / min in accordance with JIS-K7161 (1994).
- the hollow fiber membrane 11 is preferably a multilayer structure.
- the hollow fiber membrane 11 may have a cylindrical support layer 11a and a filtration layer 11b laminated on the surface (outer surface) of the support layer 11a.
- the lower limit of the number average molecular weight of PTFE of the support layer 11a and the filtration layer 11b is preferably 500,000, and more preferably 2 million.
- the upper limit of the number average molecular weight of PTFE of the support layer 11a and the filtration layer 11b is preferably 20 million. If the number average molecular weight of PTFE is less than the lower limit, the surface of the hollow fiber membrane 11 may be damaged by gas scrubbing, and the mechanical strength of the hollow fiber membrane 11 may be reduced. On the other hand, when the number average molecular weight of PTFE exceeds the above upper limit, it may be difficult to form the pores of the hollow fiber membrane 11.
- the support layer 11a for example, a tube obtained by extruding PTFE can be used.
- the support layer 11a can be given mechanical strength and holes can be easily formed.
- the tube is preferably stretched at a stretching ratio of 50% to 700% in the axial direction and 5% to 100% in the circumferential direction.
- the temperature in the stretching is preferably not higher than the melting point of the tube material, for example, not lower than 0 ° C. and not higher than 300 ° C. Stretching at a low temperature is good for obtaining a porous body having a relatively large pore diameter, and stretching at a high temperature is good for obtaining a porous body having a relatively small pore diameter.
- the stretched porous body can have high dimensional stability by heat treatment at a temperature of 200 ° C. or higher and 300 ° C. or lower, for example, for 1 minute or longer and 30 minutes or shorter, with both ends fixed and stretched.
- the pore size of the porous body can be adjusted by combining conditions such as stretching temperature and stretching ratio.
- the tube forming the support layer 11a can be obtained by, for example, blending a PTFE fine powder with a liquid lubricant such as naphtha and forming the tube by extrusion or the like and then stretching.
- dimensional stability can be improved by holding and sintering the tube for several tens of seconds to several minutes in a heating furnace maintained at a temperature equal to or higher than the melting point of PTFE fine powder, for example, 350 ° C. or higher and 550 ° C. or lower. it can.
- the average thickness of the support layer 11a is preferably 0.1 mm or more and 3 mm or less. By making the average thickness of the support layer 11a within the above range, the mechanical strength and water permeability can be imparted to the hollow fiber membrane 11 in a well-balanced manner.
- the filtration layer 11b can be formed by, for example, winding a PTFE sheet around the support layer 11a and sintering it.
- a sheet as a material for forming the filtration layer 11b
- stretching can be easily performed, and the shape and size of the pores can be easily adjusted, and the thickness of the filtration layer 11b can be reduced.
- the sintering temperature is preferably equal to or higher than the melting point of the tube forming the support layer 11a and the sheet forming the filtration layer 11b.
- the sheet for forming the filtration layer 11b is, for example, (1) a method in which an unsintered molded body obtained by resin extrusion is stretched at a temperature equal to or lower than the melting point and then sintered, and (2) the sintered resin molded body is gradually cooled.
- a method of stretching after increasing the crystallinity can be used.
- the sheet is preferably stretched at a stretching ratio of 50% to 1000% in the longitudinal direction and 50% to 2500% in the lateral direction. In particular, when the stretching ratio in the short direction is within the above range, the mechanical strength in the circumferential direction can be improved when the sheet is wound, and the durability against surface cleaning with gas can be improved.
- the filtration layer 11b when forming the filtration layer 11b by winding a sheet
- positional deviation from the sheet can be prevented, adhesion between the tube and the sheet can be improved, and the filtration layer 11b can be separated from the support layer 11a by cleaning with gas. Can be prevented.
- the number of times the sheet is wound can be adjusted according to the thickness of the sheet, and can be one or more times.
- a plurality of sheets may be wound around the tube.
- the method for winding the sheet is not particularly limited, and a method for winding in a spiral manner may be used in addition to a method for winding in the circumferential direction of the tube.
- the size (height difference) of the fine irregularities is preferably 20 ⁇ m or more and 200 ⁇ m or less.
- the fine irregularities are preferably formed on the entire outer peripheral surface of the tube, but may be formed partially or intermittently.
- examples of the method for forming the fine irregularities on the outer peripheral surface of the tube include surface treatment with flame, laser irradiation, plasma irradiation, dispersion coating of fluorine-based resin, etc., but the tube properties are affected. Surface treatment with a flame that can easily form irregularities is preferred.
- non-fired tube and sheet may be used, and the adhesion may be enhanced by sintering after winding the sheet.
- the average thickness of the filtration layer 11b is preferably 5 ⁇ m or more and 100 ⁇ m or less. By setting the average thickness of the filtration layer 11b within the above range, high filtration performance can be easily and reliably imparted to the hollow fiber membrane 11.
- the 1st water collection part 12 has the casing 12a by which the lower part is open
- the first water collecting section 12 is filled with a resin composition 12 b between the casing 12 a and the plurality of hollow fiber membranes 11 and between the plurality of hollow fiber membranes 11.
- the first water collecting section 12 is configured by inserting a bundle in which the upper end portions of the plurality of hollow fiber membranes 11 are bonded in advance with the resin composition 12b into the casing 12a, and then the resin composition or the plurality of hollow fiber membranes.
- a plurality of hollow fiber membranes 11 are integrally formed by filling a further resin composition 12b between 11 and the casing 12a.
- the first water collecting portion 12 has a protruding portion 14 that protrudes in the axial direction at the outer portion, and has an opening 15 at the outer end portion.
- the first water collecting portion 12 has a pair of concave grooves 16 extending in the axial direction at positions facing the horizontal direction across the central axis.
- the first water collecting portion 12 is sealed except for the communication portion with the plurality of hollow fiber membranes 11 and the openings 15.
- the first water collecting section 12 is formed so that the filtered liquid sent from the plurality of hollow fiber membranes 11 can be discharged from the opening 15.
- Examples of the material of the casing 12a include a resin composition mainly composed of PTFE, vinyl chloride, polyethylene, ABS resin, and the like.
- any resin composition that has high adhesion to the hollow fiber membrane 11 and the casing 12a and can be cured in the casing 12a may be used.
- the main component of the resin composition 12b is an epoxy resin and polyurethane that have high adhesiveness to PTFE and can reliably prevent the hollow fiber membrane 11 from falling off. Is preferred.
- the length L 4 in the longitudinal direction of the first water collecting portion 12 excluding the protruding portion 14 is equal to or greater than the average length L 1 in the long side direction of the existence region A.
- the lower limit of the length L 4 in the longitudinal direction is preferably 400 mm, and more preferably 600 mm.
- the upper limit of the length L 4 in the longitudinal direction is preferably 1300 mm, and more preferably 1100 mm.
- the longitudinal length L 4 is less than the above lower limit, it is impossible to communicate with the hollow fiber membranes 11 of sufficient number, there is a fear that sufficient filtration efficiency.
- the length L 4 in the longitudinal direction exceeds the upper limit, it may be difficult to handle the filtration module 1.
- the average width L 5 (length in the short direction in the horizontal direction) of the first water collecting portion 12 is not less than the average length L 2 in the short side direction of the existence region A.
- the 2nd water collection part 13 has the casing 13a by which upper part is open
- the second water collection unit 13 is filled with a resin composition 13 b between the casing 13 a and the plurality of hollow fiber membranes 11 and between the plurality of hollow fiber membranes 11.
- the second water collecting portion 13 has a protruding portion 17 protruding in the axial direction at the outer portion, and has an opening 18 at the outer end portion.
- the second water collecting portion 13 has a pair of concave grooves 19 extending in the axial direction at positions facing the horizontal direction across the central axis.
- the 2nd water collection part 13 is made into the shape which the 1st water collection part 12 reversed up and down. Further, the material of the second water collecting part 13 is the same as the material of the first water collecting part 12.
- the filtration module 1 may have a connecting member that connects the first water collecting unit 12 and the second water collecting unit 13 in order to facilitate handling (transportation, installation, replacement, etc.).
- a connecting member include a metal support rod and a resin casing (outer cylinder).
- the water distribution pipe 2 communicates with the plurality of first water collection pipes 12 and the plurality of second water collection pipes 13 of the plurality of filtration modules 1.
- the water distribution pipe 2 includes a plurality of first coupling pipes 2a connected to the side walls of the outer ends of the plurality of first water collecting sections 12 of the plurality of filtration modules 1 constituting each row, and the first coupling pipes 2a.
- the two end pipes 2b that communicate with the outer end of the first water collecting section 12 and are arranged in parallel, and the outer ends of the first water collecting section 12 and the second water collecting section 13 of each filtration module 1.
- a plurality of second coupling pipes 2c communicating with the two sections, and a water intake pipe 2d communicating with the two merging pipes 2b.
- the first coupling pipe 2a has an opening on the inner side of the peripheral wall, and communicates with the first water collecting part 12 by fitting the protrusion 14 of the first water collecting part 12 into the opening.
- the second coupling pipe 2c is communicated with the second water collecting portion 13 by bending the lower end portion thereof in an L shape inward and fitting the protruding portion 17 of the second water collecting portion 13 into the opening of the lower end portion.
- the 1st coupling pipe 2a and the 2nd coupling pipe 2c may be fitted with the 1st water collection part 12 and the 2nd water collection part 13 so that attachment or detachment is possible.
- the lower limit of the average diameter (average outer diameter) of the first coupling pipe 2a and the second coupling pipe 2c is preferably 20 mm, and more preferably 30 mm.
- the upper limit of the average diameter of the first coupling pipe 2a and the second coupling pipe 2c is preferably 60 mm, and more preferably 50 mm. If the average diameter of the 1st coupling pipe 2a and the 2nd coupling pipe 2c is less than the said minimum, there exists a possibility that filtered liquid cannot be discharged
- the two junction pipes 2b are connected to the plurality of first coupling pipes 2a at the peripheral wall.
- the two merging pipes 2b extend in parallel with the right lateral frame 6e and the left lateral frame 6f in the vicinity of the right lateral frame 6e and the left lateral frame 6f located above the filtration unit. That is, the two merging pipes 2b extend in the front-rear direction.
- the lower limit of the average diameter (average outer diameter) of the merging pipe 2b is preferably 50 mm, and more preferably 60 mm.
- the upper limit of the average diameter of the merging pipe 2b is preferably 180 mm, and more preferably 160 mm. If the average diameter of the junction pipe 2b is less than the lower limit, the filtered liquid may not be discharged efficiently. Conversely, if the average diameter of the merging pipe 2b exceeds the above upper limit, the merging pipe 2b may be unnecessarily large.
- the intake pipe 2d is connected to one end of the same side of the two junction pipes 2b. Thereby, the two merging pipes 2b and the intake pipe 2d are formed in a U shape in a plan view as a whole.
- the intake pipe 2d has an opening 22 at the center in the axial direction.
- the opening 22 of the intake pipe 2d communicates with a drain pipe (not shown), and the filtered liquid can be taken out through the drain pipe.
- the average diameter of the intake pipe 2d can be the same as the average diameter of the merge pipe 2b.
- the said filtration unit can promote the simplification and efficiency improvement of the extraction structure of filtered liquid by having the water intake pipe 2d which the water distribution pipe 2 connects to the two merge pipes 2b.
- the plurality of diffuser tubes 3 are disposed below the plurality of filtration modules 1 as shown in FIG.
- the plurality of air diffusion tubes 3 have a plurality of through holes for discharging gas.
- the plurality of air diffusion tubes 3 are arranged in parallel to the width direction of the plurality of filtration modules 1 (long side direction of the existence area A). Further, each air diffuser 3 is arranged corresponding to the gap between the filtration modules 1 adjacent to each other in each row so that gas can be discharged into the gap between the filtration modules 1 adjacent to each other in each row. .
- the lower limit of the average diameter of the through holes is preferably 1 mm, and more preferably 2 mm.
- the upper limit of the average diameter of the through holes is preferably 10 mm, and more preferably 8 mm. If the average diameter of the through holes is less than the lower limit, the gas discharge rate may not be sufficiently obtained. Conversely, if the average diameter of the through holes exceeds the above upper limit, the amount of gas discharged from each through hole will increase so much that most of the gas sent from one side of the diffuser 3 will be on one side of the diffuser 3. There is a risk that the amount discharged from the through hole on the other side of the air diffuser 3 will be reduced.
- the lower limit of the average diameter (average outer diameter) of the diffuser 3 is preferably 10 mm, and more preferably 15 mm.
- the upper limit of the average diameter of the air diffusing tube 3 is preferably 80 mm, and more preferably 60 mm. If the average diameter of the air diffusing tube 3 is less than the lower limit, a sufficient amount of gas may not be discharged. On the other hand, if the average diameter of the air diffusing tubes 3 exceeds the upper limit, it may be difficult to dispose them corresponding to the gaps between the adjacent filtration modules 1 in each row.
- the ventilation mechanism 4 pumps gas to the plurality of air diffusers 3.
- the ventilation mechanism 4 includes an air supply pipe 24 connected to the plurality of air diffusion pipes 3, and a gas supplier (not shown) that supplies gas to the air supply pipe 24.
- the supply pipe 24 is formed in a substantially L shape. Specifically, the air supply pipe 24 has a vertical portion extending in the vertical direction on the rear side of the plurality of filtration modules 1 and a horizontal portion extending forward from the lower end of the vertical portion.
- the air supply pipe 24 is connected to the plurality of air diffusion pipes 3 at the horizontal portion.
- the plurality of diffuser tubes 3 are connected to the horizontal portion so as to extend in a direction perpendicular to the axial direction of the horizontal portion.
- the plurality of guide mechanisms 5 are disposed between the plurality of diffusion tubes 3 and the plurality of filtration modules 1, and guide the gas discharged from the plurality of diffusion tubes 3 between the plurality of filtration modules 1.
- the plurality of guide mechanisms 5 are configured to intermittently discharge bubbles.
- a configuration for intermittently discharging air bubbles for example, a structure in which gas supplied from the air diffuser 3 is stored therein and gas having a constant volume is intermittently discharged can be used.
- a cover is a cross-sectional rectangular cylinder which covers the surrounding surface of the up-down direction of a filtration unit. Surround at least a part of the vertical direction of the filtration unit. For example, a cover may be provided so as to surround the upper part of the filtration unit.
- the filtration unit since the water distribution pipe 2 communicates with the outer end portions of the plurality of first water collecting portions 12, the operating rate of the hollow fiber membrane 11 communicating with the vicinity of the outer end portion of the first water collecting portion 12 is increased. It tends to be expensive. Therefore, in the filtration unit, the hollow fiber membrane 11 communicating with the vicinity of the outer end portion of the first water collecting portion 12 is easily contaminated. In this regard, in the filtration unit, since the hollow fiber membrane 11 that is easily contaminated is disposed outside the filtration module, for example, even when the plurality of filtration modules 1 are disposed in the filtration unit, The hollow fiber membrane 11 that is likely to adhere can be easily washed. Therefore, the filtration unit can improve the cleaning efficiency of the hollow fiber membrane 11.
- the said filtration unit has the some 2nd coupling pipe 2c which the water distribution pipe 2 connects between the outer side edge part of the 1st water collection part 12 of each filtration module 1, and the outer side edge part of the 2nd water collection part 13. Therefore, in addition to the 1st water collection part 12, the filtered liquid can be taken out also from the 2nd water collection part 13, and efficiency improvement of the filtration process can be accelerated
- the second coupling pipe 2c communicates with the first water collection unit 12 in the filtration unit, the filtered liquid collected by the second water collection unit 13 is filtered with the filtered liquid collected by the first water collection unit 12. Since it can be taken out using the same path, the number of members can be reduced, the structure can be simplified, and the cost can be reduced.
- the said filtration unit is arrange
- the filtration unit includes a plurality of guide mechanisms 5 that are disposed between the plurality of diffusion tubes 3 and the plurality of filtration modules 1 and guide the gas discharged from the plurality of diffusion tubes 3 between the plurality of filtration modules 1. Impurities adhering to the surfaces of the plurality of hollow fiber membranes 11 can be further easily and reliably removed.
- the filter unit is configured such that the guide mechanism 5 intermittently discharges air bubbles, so that impurities attached to the surfaces of the plurality of hollow fiber membranes 11 can be more efficiently removed.
- the said filtration unit is provided with the cover surrounding the up-down direction of the said filtration unit, it can prevent that the gas for washing
- the filtration unit is not necessarily composed of a linear second water collecting portion communicating with the lower openings of the plurality of hollow fiber membranes, an outer end portion of the first water collecting portion, and an outer end portion of the second water collecting portion.
- the plurality of second coupling pipes communicating with each other may not be provided.
- the filtration unit is connected to the lower end part of the plurality of hollow fiber membranes and has a flow path inside as a configuration without the second water collection part and the second coupling pipe. You may provide the lower holding
- the second coupling pipe communicating with the second water collection section does not necessarily need to communicate with the first coupling pipe. You may communicate with a junction pipe independently.
- the filtration unit does not necessarily need to communicate with the water distribution pipe (the first coupling pipe and the second coupling pipe) on the side wall of the outer end in the axial direction of the first water collection section and the second water collection section. You may communicate with a water pipe in the upper wall of an outer side edge part.
- the filtration unit does not necessarily have to have a water intake pipe communicating with the two merging pipes, and each filtered liquid may be taken out from each merging pipe.
- this intake pipe does not necessarily need to be connected to each one end of two joining pipes, For example, you may connect to the center of the axial direction of each joining pipe.
- the filtration unit does not necessarily need to include a plurality of air diffusers and a ventilation mechanism that pumps gas to the air diffusers.
- the filtration unit has a configuration for discharging gas from below the filtration module, for example, a jet-type diffuser that injects gas from a diffuser, a sparger, etc. It is also possible to use a bubbling jet nozzle that injects.
- the filtration unit does not necessarily have a plurality of guide mechanisms that guide the gas between the plurality of filtration modules. That is, the said filtration unit may discharge gas directly between a filtration module from a some diffuser tube or another apparatus.
- the guide mechanism does not necessarily need to be configured to intermittently discharge bubbles, and is configured to discharge bubbles or gas continuously. May be.
- the filtration unit has a high pressure on the outer peripheral surface side of the hollow fiber membrane and allows the liquid to be processed to be internalized by external pressure, osmotic pressure, or negative pressure on the inner peripheral surface side. It can be used as various filtration units such as an immersion type that penetrates to the peripheral surface side. Among these, the filtration unit is suitable as an external pressure type filtration unit.
- the filtration unit of the present invention can improve the efficiency of washing the hollow fiber membrane, and can be suitably used in various fields as a solid-liquid separation treatment apparatus.
- SYMBOLS 1 Filtration module 2 Water distribution pipe, 2a 1st coupling pipe, 2b Merge pipe 2c 2nd coupling pipe, 2d Water intake pipe, 3 Air diffusion pipe, 4 Ventilation mechanism, 5 Guide mechanism 6a Front vertical frame, 6b Rear vertical frame, 6c Front side frame 6d Rear side frame, 6e Right side frame, 6f Left side frame 6g Support frame, 6h Module support frame 11 Hollow fiber membrane, 11a Support layer, 11b Filtration layer 12 First water collection part, 12a Casing, 12b Resin Composition 13 2nd water collection part, 13a casing, 13b Resin composition 14,17 Protrusion part, 15,18,22 Opening 16,19 Concave groove, 24 Air supply pipe
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Abstract
Description
最初に本発明の実施態様を列記して説明する。
以下、図面を参照しつつ、本発明の一実施形態に係る濾過ユニットについて説明する。
当該濾過ユニットは、被処理液中に浸漬して用いられる。当該濾過ユニットは、図1及び図2に示すように、複数の濾過モジュール1と、配水管2と、複数の散気管3と、通気機構4と、複数のガイド機構5とを主として備える。また、当該濾過ユニットは、この濾過ユニットの支持構造を形成する複数のフレーム6a~6hを有する。
複数の濾過モジュール1は、図3、図4及び図6に示すように、上下方向に引き揃えられかつ板状に配設される複数本の中空糸膜11と、複数本の中空糸膜11の上部開口に連通し、各中空糸膜11内に透過した濾過済液が流通する線状の第1集水部12と、複数本の中空糸膜11の下部開口に連通し、各中空糸膜11内に透過した濾過済液が流通する線状の第2集水部13とを有する。
中空糸膜11は、水を透過させる一方、被処理液に含まれる不純物の透過を阻止する多孔性の膜を管状に成形したものである。
中空糸膜11の気孔率が上記下限に満たないと、透水性が低下し、濾過モジュール1の濾過能力が低下するおそれがある。逆に、中空糸膜11の気孔率が上記上限を超えると、中空糸膜11の機械的強度及び耐擦過性が不十分となるおそれがある。なお、気孔率とは、中空糸膜11の体積に対する空孔の総体積の割合をいい、ASTM-D-792に準拠して中空糸膜11の密度を測定することで求めることができる。
中空糸膜11の引張強度が上記下限に満たないと、気泡による表面洗浄に対する耐久性が低下するおそれがある。一方、中空糸膜11の引張強度の上限は、一般的には150Nである。なお、引張強度とは、JIS-K7161(1994)に準拠し、標線間距離100mm、試験速度100mm/minで引張試験を行った際の最大引張応力を意味する。
上記微細凹凸はチューブ外周面全体に形成されることが好ましいが、部分的又は断続的に形成されていてもよい。また、上記微細凹凸をチューブ外周面に形成する方法としては、例えば火炎による表面処理、レーザー照射、プラズマ照射、フッ素系樹脂等のディスパージョン塗布等を挙げることができるが、チューブ性状に影響を与えず容易に凹凸を形成できる火炎による表面処理が好ましい。
第1集水部12は、図6に示すように、下方が開放され、下側から複数本の中空糸膜11の上端部分が挿入されるケーシング12aを有する。また、第1集水部12は、ケーシング12aと複数本の中空糸膜11との間及び複数本の中空糸膜11間に樹脂組成物12bが充填されている。詳細には、第1集水部12は、複数本の中空糸膜11の上端部分を予め樹脂組成物12bにより接着した束をケーシング12aに挿入した上、樹脂組成物又は複数本の中空糸膜11とケーシング12aとの間にさらなる樹脂組成物12bを充填することで複数本の中空糸膜11と一体的に形成される。また、第1集水部12は、外側部分に軸方向に突出する突出部14が形成されると共に、外側端部に開口15を有する。さらに、第1集水部12は、図3及び図4に示すように、中心軸を挟んで水平方向に対向する位置に軸方向に伸びる一対の凹溝16を有する。第1集水部12は、複数本の中空糸膜11との連通部及び開口15以外は密閉状とされている。第1集水部12は、複数本の中空糸膜11から送られる濾過済液を開口15から排出可能に形成されている。
第2集水部13は、図6に示すように、上方が開放され、上側から複数本の中空糸膜11の下端部分が挿入されるケーシング13aを有する。また、第2集水部13は、ケーシング13aと複数本の中空糸膜11との間及び複数本の中空糸膜11間に樹脂組成物13bが充填されている。また、第2集水部13は、外側部分に軸方向に突出する突出部17が形成されると共に、外側端部に開口18を有する。さらに、第2集水部13は、図3及び図4に示すように、中心軸を挟んで水平方向に対向する位置に軸方向に伸びる一対の凹溝19を有する。具体的には、第2集水部13は、第1集水部12が上下に反転した形状とされる。また、第2集水部13の材質としては、第1集水部12の材質と同様とされる。
配水管2は、図1に示すように、複数の濾過モジュール1の複数の第1集水管12及び複数の第2集水管13に連通する。配水管2は、各列を構成する複数の濾過モジュール1の複数の第1集水部12の外側端部の側壁に接続する複数の第1結合管2aと、この第1結合管2aを介して第1集水部12の外側端部に連通し、平行に配設される2本の合流管2bと、各濾過モジュール1の第1集水部12と第2集水部13の外側端部との間に連通する複数の第2結合管2cと、2本の合流管2bに連通する取水管2dとを有する。
複数の散気管3は、図2に示すように、複数の濾過モジュール1の下方に配設される。
複数の散気管3は、気体を吐出する複数の貫通孔を有する。複数の散気管3は、複数の濾過モジュール1の幅方向(上記存在領域Aの長辺方向)と平行に配設される。また、各散気管3は、各列において前後に隣接する濾過モジュール1間の間隙に気体を吐出できるよう、各列において前後に隣接する濾過モジュール1間の間隙に対応して配設構成される。
通気機構4は、複数の散気管3に気体を圧送する。通気機構4は、図2に示すように、複数の散気管3と接続する給気管24と、給気管24に気体を供給する気体供給器(図示せず)とを有する。給気管24は、略L字状に形成される。詳細には、給気管24は、複数の濾過モジュール1の後側において上下方向に伸びる垂直部と、この垂直部の下端から前方に伸びる水平部とを有する。給気管24は、上記水平部において複数の散気管3と接続される。具体的には、複数の散気管3は、上記水平部の軸方向と垂直な方向に伸びるよう上記水平部と接続する。
複数のガイド機構5は、複数の散気管3と複数の濾過モジュール1との間に配設され、複数の散気管3から吐出した気体を複数の濾過モジュール1間に導く。
カバーは、濾過ユニットの上下方向の周面を覆う断面矩形筒状体である。濾過ユニットの上下方向の少なくとも一部を囲繞する。例えば当該濾過ユニットの上方部分を囲繞するようにカバーを設けてもよい。
当該濾過ユニットは、配水管2が複数の第1集水部12の外側端部に連通しているので、第1集水部12の外側端部付近に連通する中空糸膜11の稼働率が高くなりやすい。そのため、当該濾過ユニットは、第1集水部12の外側端部付近に連通する中空糸膜11が汚れやすくなる。この点に関し、当該濾過ユニットは、汚れやすい中空糸膜11が濾過モジュールの外側に配設されるので、例えば複数の濾過モジュール1が当該濾過ユニットに配設された状態であっても、汚れの付着しやすい中空糸膜11の洗浄を容易に行うことができる。従って、当該濾過ユニットは、中空糸膜11の洗浄の効率を向上することができる。
今回開示された実施の形態は全ての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記実施形態の構成に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内での全ての変更が含まれることが意図される。
2c 第2結合管、2d 取水管、3 散気管、4 通気機構、5 ガイド機構
6a 前側縦フレーム、6b 後側縦フレーム、6c 前側横フレーム
6d 後側横フレーム、6e 右側横フレーム、6f 左側横フレーム
6g 支持フレーム、6h モジュール支持フレーム
11 中空糸膜、11a 支持層、11b 濾過層
12 第1集水部、12a ケーシング、12b 樹脂組成物
13 第2集水部、13a ケーシング、13b 樹脂組成物
14,17 突出部、15,18,22 開口
16,19 凹溝、24 給気管
Claims (7)
- 上下方向に引き揃えられかつ板状に配設される複数本の中空糸膜及びこれらの中空糸膜の上部開口に連通し、各中空糸膜内に透過した濾過済液が流通する線状の第1集水部を有する複数の濾過モジュールと、
上記複数の濾過モジュールの複数の第1集水部に連通する配水管と
を備える濾過ユニットであって、
上記複数の濾過モジュールが、二列にかつ各列がストライプ状に配設され、
上記配水管が、各列を構成する上記複数の濾過モジュールの複数の第1集水部の外側端部に第1結合管を介して連通し、平行に配設される2本の合流管を有する濾過ユニット。 - 上記濾過モジュールが、複数本の中空糸膜の下部開口に連通し、各中空糸膜内に透過した濾過済液が流通する線状の第2集水部を有し、
上記配水管が、各濾過モジュールの第1集水部の外側端部と第2集水部の外側端部との間に連通する複数の第2結合管を有する請求項1に記載の濾過ユニット。 - 上記配水管が、上記2本の合流管に連通する取水管を有する請求項1又は請求項2に記載の濾過ユニット。
- 上記複数の濾過モジュールの下方に配設され、気体を吐出する複数の貫通孔を有する複数の散気管と、この複数の散気管に気体を圧送する通気機構とを備える請求項1、請求項2又は請求項3に記載の濾過ユニット。
- 上記複数の散気管と複数の濾過モジュールとの間に配設され、上記複数の散気管から吐出した気体を上記複数の濾過モジュール間に導く複数のガイド機構を備える請求項4に記載の濾過ユニット。
- 上記ガイド機構が、間欠的に気泡を吐出するよう構成されている請求項5に記載の濾過ユニット。
- 上記濾過ユニットの上下方向を囲繞するカバーを備える請求項1から請求項6のいずれか1項に記載の濾過ユニット。
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CN115487685B (zh) * | 2022-10-25 | 2023-06-20 | 深圳市爱佳尔科技有限公司 | 一种零排放净水设备 |
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KR100812187B1 (ko) * | 2007-02-12 | 2008-03-12 | 주식회사 케이엠에스 | 카트리지형 중공사 막 모듈 |
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- 2016-02-18 JP JP2016540067A patent/JPWO2016152336A1/ja active Pending
- 2016-02-18 CN CN201680008569.XA patent/CN107206325A/zh not_active Withdrawn
- 2016-02-18 CA CA2977459A patent/CA2977459A1/en not_active Abandoned
- 2016-02-18 US US15/551,361 patent/US20180028981A1/en not_active Abandoned
- 2016-02-18 WO PCT/JP2016/054631 patent/WO2016152336A1/ja active Application Filing
- 2016-02-26 TW TW105105955A patent/TW201636092A/zh unknown
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JPH0972993A (ja) * | 1995-09-07 | 1997-03-18 | Japan Organo Co Ltd | 中空糸膜を用いるろ過塔のスクラビング方法 |
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Also Published As
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JPWO2016152336A1 (ja) | 2018-01-11 |
TW201636092A (zh) | 2016-10-16 |
CN107206325A (zh) | 2017-09-26 |
CA2977459A1 (en) | 2016-09-29 |
US20180028981A1 (en) | 2018-02-01 |
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