WO2008062788A1 - Membrane à fibre creuse pour la filtration par immersion, module de membrane à fibre creuse pour la filtration par immersion utilisant celle-ci, appareil pour la filtration par immersion, et procédé de filtration par immersion - Google Patents

Membrane à fibre creuse pour la filtration par immersion, module de membrane à fibre creuse pour la filtration par immersion utilisant celle-ci, appareil pour la filtration par immersion, et procédé de filtration par immersion Download PDF

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Publication number
WO2008062788A1
WO2008062788A1 PCT/JP2007/072458 JP2007072458W WO2008062788A1 WO 2008062788 A1 WO2008062788 A1 WO 2008062788A1 JP 2007072458 W JP2007072458 W JP 2007072458W WO 2008062788 A1 WO2008062788 A1 WO 2008062788A1
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WO
WIPO (PCT)
Prior art keywords
hollow fiber
fiber membrane
filtration
immersion
immersion filtration
Prior art date
Application number
PCT/JP2007/072458
Other languages
English (en)
Japanese (ja)
Inventor
Manabu Sasakawa
Naoya Kanno
Kenji Honjou
Original Assignee
Mitsubishi Rayon Engineering Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Rayon Engineering Co., Ltd. filed Critical Mitsubishi Rayon Engineering Co., Ltd.
Priority to KR1020097010006A priority Critical patent/KR101156411B1/ko
Priority to JP2008545406A priority patent/JP5795459B2/ja
Priority to CN2007800426727A priority patent/CN101541404B/zh
Publication of WO2008062788A1 publication Critical patent/WO2008062788A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/08—Hollow fibre membranes
    • B01D69/082—Hollow fibre membranes characterised by the cross-sectional shape of the fibre
    • 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
    • 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
    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • 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
    • B01D2311/14—Pressure control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/04—Specific sealing means
    • B01D2313/042—Adhesives or glues
    • 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
    • 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
    • B01D2321/185—Aeration
    • 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
    • B01D2321/20—By influencing the flow
    • B01D2321/2033—By influencing the flow dynamically

Definitions

  • Hollow fiber membrane for immersion filtration hollow fiber membrane module for immersion filtration using the same, immersion filtration device, and immersion filtration method
  • the present invention relates to a hollow fiber membrane for immersion filtration, a hollow fiber membrane module for immersion filtration using the same, and an immersion filtration filter that is suitable for immersion suction filtration of liquids with high pollution properties (particularly due to organic contaminants).
  • the present invention relates to an apparatus and an immersion filtration method.
  • the “Hollow Fiber Membrane Filtration Method” causes a suspended layer of organic matter and suspended matter in the treated water to form on the outer surface of the hollow fiber membrane over a long period of operation, and the hollow fiber membrane is clogged or solid. It has been pointed out that there is a problem of channel blockage (fouling). Falling can lead to increased transmembrane pressure and reduced filtration flux, which adversely affects the overall operating efficiency of the water treatment system.
  • the reduction in operation efficiency of the water treatment system due to fouling can be eliminated by physical cleaning of the hollow fiber membrane.
  • reverse flow cleaning that reverses membrane filtered water
  • air publishing that vibrates the hollow fiber membrane with air Remove attached substances by physical action! / ,!
  • Flushing and air bubbling which are the physical cleaning methods described above, are effective means for reducing fouling and are indispensable for stabilizing the filtration operation.
  • concentration of suspended solids in the water to be treated is high, physical cleaning is required to obtain a sufficient cleaning effect. It is necessary to increase the strength.
  • the hollow fiber membranes may come into contact with each other or the suspended solids in the water to be treated may be rubbed, and the surface of the hollow fiber membrane may be scratched, possibly resulting in yarn breakage. There was a thing.
  • Patent Document 1 For the purpose of improving the shape of the hollow fiber membrane, Patent Document 1 describes a hollow fiber membrane whose shape is changed in an inclined manner. According to Patent Document 1, by changing the shape of the hollow fiber membrane in an inclined manner, the flow pressure loss is reduced as compared with the conventional hollow fiber membrane, the permeate flow velocity distribution is smoothed, and the load on the membrane local area is reduced. Since the contamination is dispersed, the publishing and backwashing properties when performing membrane cleaning are improved, and the filtration operation can be prolonged.
  • Patent Literature 2 which has a specific viscosity average molecular weight, a molecular weight distribution, and a polyethylene hollow fiber porous membrane force having a specific pore structure.
  • Patent Document 1 Japanese Patent Laid-Open No. 7-96152
  • Patent Document 2 JP 2001-269556 A
  • Patent Document 1 In the hollow fiber membrane of Patent Document 1, an increase in the permeate flow rate can be expected due to the inclined structure, but Patent Document 1 does not have a specific disclosure regarding improvement in operational stability and cleanability. Issues remain in terms of long-term operational stability. In addition, in order to obtain such a membrane, the hollow fiber membrane production process is inevitably complicated, and the productivity is low and the production cost is high.
  • the hollow fiber porous membrane of Patent Document 2 can be expected to improve the scratch resistance against suspended components in the liquid to be treated, but it is expected that wear due to contact between the hollow fiber porous membranes will occur, and long-term operation will occur. From the point of view, it does not lead to a solution. Moreover, it is difficult to reduce the physical cleaning strength only by improving the strength of the membrane, and it does not lead to a fundamental solution.
  • the present invention has been made in view of the above circumstances, and a filtration operation in which deposits hardly accumulate on the membrane surface even when hollow fiber membrane filtration in a high-concentration suspension is continued.
  • the water permeability performance It is an object of the present invention to provide a hollow fiber membrane for immersion filtration that can be continued for a long time without lowering, a hollow fiber membrane module for immersion filtration, an immersion filtration device, and an immersion filtration method using the same.
  • the present inventors have provided a protrusion on the outer surface of the hollow fiber membrane, so that the outer surface of the hollow fiber membrane in the case of applying the hollow fiber membrane to immersion filtration of a highly pollutant liquid is obtained. It was clarified that the detergency was improved, and the present invention was completed.
  • the present invention is a hollow fiber membrane for immersion filtration having one or more protrusions on the outer surface.
  • the present invention is a hollow fiber membrane module for immersion filtration, wherein a plurality of the hollow fiber membranes for immersion filtration are bonded and fixed to a housing.
  • the present invention is an immersion filtration apparatus in which the hollow fiber membrane module for immersion filtration is installed in an immersion water tank.
  • the present invention also covers a hollow fiber membrane module for immersion filtration in which an immersion water tank is filled with water to be treated, and a plurality of hollow fiber membranes for immersion having one or more protrusions on the outer surface are bonded and fixed to a housing. It is an immersion filtration method in which the filtrate is immersed in treated water to obtain filtrate from the hollow portion of the hollow fiber membrane for immersion filtration.
  • FIG. 1 is a schematic view showing an example of an embodiment of a hollow fiber membrane having a protrusion.
  • FIG. 2 is a schematic view showing an example of an embodiment of a hollow fiber membrane module according to the present invention.
  • FIG. 3 is a view showing a processing flow of an immersion filtration test of an example.
  • FIG. 4 is a diagram showing a graph of experimental results of Examples. Explanation of symbols
  • FIG. 1 is a view showing an example of an embodiment of a hollow fiber membrane for immersion filtration having a protrusion on the outer surface. It is important that the hollow fiber membrane 3 for immersion filtration is provided with a protrusion 5 on its outer surface.
  • the manufacturing method of the hollow fiber membrane 3 for immersion filtration having the protrusions 5 may be such that the protrusions 5 may be polymerized later on the hollow fiber membrane having no protrusion structure, or the hollow fiber membrane for immersion filtration. 3 Although it may be shaped into a shape having protrusions 5 at the time of manufacture! /, It is possible to reduce the manufacturing process and manufacturing cost, so it is possible to shape at the time of manufacturing the hollow fiber membrane 3 for immersion filtration. preferable.
  • the shape of the protrusion 5 is not particularly limited as long as the protrusion 5 has a protrusion on the outer surface of the immersion filtration hollow fiber membrane 3. However, a large amount of the immersion filtration hollow fiber membrane 3 can be stably and continuously formed.
  • the structure as shown in FIG. 1 having at least one protrusion 5 having a continuous shape in the longitudinal direction on the outer surface of the hollow fiber membrane 3 for immersion filtration is particularly preferable.
  • the number of protrusions 5 having a shape that is continuous in the longitudinal direction is not particularly limited, but when a plurality of hollow fiber membranes 3 for immersion filtration are arranged, the number of protrusions 5 that are adjacent to the surroundings is determined. In order to effectively obtain the cleaning effect, it is particularly preferable to have 8 or more. On the other hand, if the number of the protrusions 5 is too large, there is a risk of reducing the filtration capacity due to a reduction in the effective filtration area of the hollow fiber membrane 3 for immersion filtration. Therefore, the number of the protrusions 5 is such that the projected area ratio of the protrusions 5 to the outer surface of the hollow fiber membrane 3 for immersion filtration when the protrusions 5 are excluded is in the range of 1 to 20%. It is preferable to adjust so that it becomes. This is because when the projected area ratio is 1% or more, an excellent cleaning effect by the protrusions 5 tends to be exhibited. More preferably, it is 5% or more.
  • the projected area ratio to 20% or less, there is a tendency that the cleaning effect by the protrusions 5 and the above-described filtration processing ability can be compatible. More preferably, it is 15% or less.
  • the protrusion 5 is formed by removing and depositing deposits deposited on the surface of the hollow fiber membrane 3 by physical cleaning. To make it easier to get out, the shape of the protrusion 5 is parallel from the root to the tip, or the root force is reduced toward the tip, and the shape is preferred.
  • the protrusion structure provided on the outer periphery of the hollow fiber membrane 3 for immersion filtration makes the adhering layer deposited on the outer surface discontinuous, and excessively on the outer surface of the adjacent hollow fiber membrane 3 for immersion filtration. It is intended to physically peel and remove the deposits by contacting them. For this reason, it is preferable that the protrusion 5 does not have deposits. Therefore, it is more preferable that the structure having a significantly reduced filtration function does not substantially have a preferable filtration function.
  • the width of the protrusion 5 is not particularly limited! /, But is preferably 5 1 m or more! /. This is because when the width of the protruding portion 5 is 5 m or more, deformation or breakage of the protruding portion 5 occurs due to the swinging of the submerged hollow fiber membrane 3 during filtration or mutual collision. This is because there is a tendency. Further, this is because the shape of the protruding portion 5 at the time of manufacturing the hollow fiber membrane is stable, and the productivity of the hollow fiber membrane 3 for immersion filtration tends to be good. More preferably, it is 15 111 or more.
  • the width of the protrusion 5 is not particularly limited, but is preferably 50 m or less. This is because by setting it to 50 ⁇ or less, an excellent membrane surface cleaning effect tends to be expected while maintaining the effective filtration area of the hollow fiber membrane 3 for immersion filtration. More preferably, it is 40 m or less.
  • the distance between the protrusions 5 can be appropriately selected as necessary.
  • the protrusions 5 are substantially equal to the outer surface of the hollow fiber membrane 3 for immersion filtration. It is preferable that they are arranged at intervals.
  • the height of the projection 5 is not particularly limited, but is sufficiently higher than the deposit layer deposited on the outer surface of the hollow fiber membrane 3 for immersion filtration in order to obtain an excellent membrane surface cleaning effect. I like it.
  • the deposit layer deposited on the outer surface of the hollow fiber membrane 3 for immersion filtration and its height are different forces S depending on the quality of the treated water S, especially in sewage drainage applications where the particle concentration in the treated water is relatively high.
  • the height of the protrusion 5 is preferably 5 m or more. More preferably, it is on 10 ⁇ m ⁇ A. Further, the height of the protrusion 5 is not particularly limited, but is preferably 3 times or less the width of the root portion. This is because when the ratio is set to 3 times or less, deformation or breakage of the protrusion 5 tends to occur due to the oscillation of the hollow fiber membrane 3 for immersion filtration during filtration or mutual collision. . More preferably, it is 2 times or less.
  • the height of the protrusion 5 in the present invention refers to the distance from the outer surface of the hollow fiber membrane to the tip of the protrusion when the protrusion is excluded.
  • the hollow fiber membrane 3 for immersion filtration according to the present invention is a membrane in a portion without the projections 5 that preferably has an inner diameter of S50 to 1000 m from the viewpoint of shape stability and handleability.
  • the thickness is preferably in the range of 5 to 300 mm.
  • the hollow fiber membrane 3 for immersion filtration of the present invention can be used for generally known reverse osmosis membranes, ultrafiltration membranes, microfiltration membranes and large pore membranes, but preferably limited. It can be used as an outer filtration membrane, a microfiltration membrane and a large pore membrane, and is in the range of 0.005 to 5111. Further, the material of the hollow fiber membrane 3 for immersion filtration is not particularly limited, and polysulfone, polyethersulfone, polyacrylonitrile, polyimide, polyetherimide, polyamide, polyetherketone, polyetheretherketone, polyethylene, polypropylene, poly-4-methylenepentene. Cellulose, cellulose acetate, polyvinylidene fluoride, polyethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene, and the like. These composite materials can also be used.
  • the protrusions 5 are polymerized later on the hollow fiber membrane having no protrusion structure, different materials may be used, but the hollow fiber membrane and the protrusions 5 In consideration of adhesion and the like, it is preferable to use the same material for each.
  • FIG. 2 is a diagram showing an example of an embodiment of a hollow fiber membrane module for immersion filtration using the hollow fiber membrane for immersion filtration of the present invention.
  • a plurality of hollow fiber membranes 3 for immersion filtration are bundled in a sheet shape, and at least one end of the hollow fiber membrane 3 for immersion filtration is kept open.
  • the force S obtained by the manufacturing method in which the hollow fiber membrane bundle is potted with the fixing resin 2 that is adhered and fixed to the housing 1 is measured.
  • At least one end of the housing 1 is provided with a pipe that is open to the outside and communicates with an internal passage for passing a processing solution contained in the housing 1.
  • the hollow fiber membrane bundle used in the hollow fiber membrane module 19 for immersion filtration of the present invention may be a simple bundle of hollow fiber membranes 3 for immersion filtration. From the standpoint of performance, hollow fiber membrane bundles are wound in multiple strands on a saddle frame body, hollow fiber membranes 3 are used as weft yarns, or several knitted fabrics are laminated. What was used as the laminated body can be used conveniently. The form of these hollow fiber membrane bundles can be appropriately selected according to the hollow fiber membrane 3 for immersion filtration used.
  • the material of the housing 1 used in the hollow fiber membrane module 19 for immersion filtration of the present invention may be any material as long as it has mechanical strength and durability.
  • polycarbonate, polysulfone, polyolefin, PVC (polychlorinated) Bull), acrylic resin, ABS resin, modified PPE (polyphenylene ether) and the like can be used.
  • a hydrocarbon-based resin such as polyolefin that can be completely burned without producing toxic gas by combustion.
  • the hollow fiber membrane 3 for immersion filtration is fixed in the housing 1 with the fixing resin 2 while the opening surface communicates with the internal path while maintaining the opening surface.
  • an epoxy resin As the fixing resin 2 used here, an epoxy resin, a urethane resin, an epoxy acrylate resin, a silicon resin, various hot melt resins, and the like can be used, and can be appropriately selected.
  • the viscosity (20 ° C) of the fixing resin 2 during the fixing operation of the immersion filtration hollow fiber membrane 3 is not particularly limited, but the fixing resin 2 is impregnated between the plurality of immersion filtration hollow fiber membranes 3. It is preferable that the power to ease is 5000 mPa's or less. More preferably, it is 3000 mPa's or less.
  • the fixing resin 2 can be made to contain a fibrous material such as glass fiber or carbon fiber, or fine powder such as carbon black, alumina or silica. Monkey.
  • an air diffuser is provided below the hollow fiber membrane module 19 for immersion filtration. Is preferred. This makes it easier for the suspended solids concentrated near the membrane surface by immersion filtration to be discharged out of the module by air publishing.
  • the hollow fiber membrane module 19 for immersion filtration does not have a casing. It is preferable that the distance between the housings 1 at both ends is fixed by a support or the like that connects the adhesive fixing portions at both ends.
  • the filling rate of the hollow fiber membrane 3 for immersion filtration is 25 to 25% in order to increase the filtration capacity per volume and increase the cleaning efficiency by air publishing. A range of 70% is preferable.
  • the relaxation rate force of the hollow fiber membrane 3 for membrane filtration between the housings 1 It is preferably 5% or more.
  • this relaxation rate is preferably 5% or less.
  • the concentration of particles in the water to be treated For sewage drainage applications with a relatively high value, the air supply rate per projected floor area of the module is preferably 50 m 3 / m 2 / h or more.
  • the air supply amount should be 200 m 3 / m 2 / h or less. Is preferred
  • Air publishing can be performed continuously during immersion filtration. If necessary, cycle operation in which immersion filtration and air bubbling are repeated at regular intervals may be employed.
  • the protrusions 5 are provided on the outer surface of each hollow fiber membrane 3 for immersion filtration. Immersion by air publishing Due to the vibration of the filtration hollow fiber membrane 3, the protrusion 5 comes into contact with the deposits excessively deposited on the outer surface of the adjacent hollow fiber membrane 3 and can be effectively removed.
  • the effective filtration portions of the adjacent hollow fiber membranes are in direct contact with each other. It is possible to prevent the deposits on the film surface from being consolidated and to prevent the deposits from being firmly fixed to the fine pores of the effective filtration portion, and to effectively peel and remove the deposits on the film surface.
  • the effective filtration portions in the circumferential direction of the hollow fiber membrane can be formed discontinuously.
  • the deposit on the effective filtration portion also becomes discontinuous in the circumferential direction of the hollow fiber membrane, and the cohesive force between the deposits decreases, so the deposit is easily peeled and removed by air publishing etc. # One way.
  • the present invention can be applied to various immersion filtration methods.
  • the present invention can be used for immersion pressure filtration, but is more suitable for immersion suction filtration for a highly contaminated liquid as described above. It is a thing.
  • the present invention can be suitably used particularly for water and sewage treatment and industrial wastewater treatment.
  • Omm double pipe structure Using a hollow fiber shaping nozzle with 12 cutouts on the outer periphery, air is introduced by self-priming and melt spinning at a spinning temperature of 165 ° C and a winding speed of 70 m / min. The unstretched hollow fiber having 12 protrusions continuous in the longitudinal direction on the outer periphery was obtained.
  • This unstretched hollow fiber was 80% cold-drawn, then hot-stretched between slit heaters heated to 113 ° C until the total draw amount reached 600%, and further heated to the same temperature. It was made porous with a slit heater.
  • the hollow fiber membrane thus obtained had an inner diameter of 354 m, a film thickness of 100 mm with no protrusions, a porosity of 72%, a protrusion height of 19 m, and a protrusion width of 20 m. It was.
  • the ratio of the projected area of the protrusion to the outer surface with respect to the outer surface of the hollow fiber membrane when the protrusion was excluded was 14%.
  • the filling rate of the hollow fiber membrane in the most dense place was 60%, and the relaxation rate was 1.5%.
  • This hollow fiber membrane was bundled to produce a hollow fiber membrane module for immersion filtration under the same conditions as in Example 1.
  • the raw water that has flowed into the screen 6 is temporarily stored in the flow rate adjusting tank 7 after the impurities are removed, and then supplied to the denitrification water tank 11 using the supply pump 8.
  • the raw water supplied to the denitrification water tank 11 enters the membrane immersion water tank 13 via the supply pipe 15 and is circulated by the circulation pump 12 at a predetermined circulation rate.
  • the raw water is biologically purified by activated sludge in the denitrification water tank 11 and the membrane immersion water tank 13. Removal of nitrogen components in the raw water is performed by so-called nitrification denitrification reaction by circulating sludge between the denitrification water tank 11 and the membrane immersion tank 13.
  • the organic matter (BOD) in the raw water is aerobically oxidized and decomposed by the air discharged mainly from the air discharge portion of the air diffuser pipe 16 disposed in the membrane immersion water tank 13.
  • air is always discharged from the air diffuser 16 by the blower 18, and the hollow fiber membrane module is discharged. It is also used as a physical cleaning means for the tool No. 19.
  • the purified water is separated from the activated sludge by membrane filtration using the hollow fiber membrane module 19.
  • the filtered water is supplied to the membrane treatment water tank 24 by the filtration pump 22, and after being disinfected as necessary, it is discharged as treated water.
  • the unit in which the hollow fiber membrane module having the protrusion (Example 1) is integrated with the unit in which the hollow fiber membrane module having no protrusion structure (Comparative Example 1) is integrated.
  • the increase in membrane differential pressure is suppressed despite the same operating conditions, and by using hollow fiber membranes with protrusions on the outer surface of each hollow fiber membrane, a high concentration of suspension Even when membrane filtration is continued in the liquid, the physical cleaning effect by air publishing is enhanced, making it difficult for excessive deposits to accumulate on the membrane surface, and the operation continues without reducing water permeability.
  • the power of S The power of S
  • suspended substances and organic substances in raw water that do not use extra cleaning energy in the treatment of purified water, industrial water, sewage, human waste, industrial wastewater, etc. and immersion filtration in a combined septic tank, etc.
  • a dipping filtration method is provided.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Artificial Filaments (AREA)

Abstract

L'invention concerne une membrane à fibre creuse en vue d'une filtration par immersion qui présente une ou plusieurs parties en saillie sur la surface externe ; et un module de membrane à fibre creuse en vue d'une filtration par immersion qui est produite en collant et fixant deux de ces membranes à fibre creuse ou plus sur un boîtier. Même lorsque la filtration à membrane dans une suspension fortement concentrée est poursuivie, l'effet consistant à nettoyer physiquement les membranes ou le module par barbotage d'air est puissant et un dépôt en excès est moins apte à s'accumuler sur la surface de la membrane. En conséquence, les membranes et le module ne subissent aucune diminution de la perméabilité à l'eau pendant que l'opération se poursuit.
PCT/JP2007/072458 2006-11-20 2007-11-20 Membrane à fibre creuse pour la filtration par immersion, module de membrane à fibre creuse pour la filtration par immersion utilisant celle-ci, appareil pour la filtration par immersion, et procédé de filtration par immersion WO2008062788A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020097010006A KR101156411B1 (ko) 2006-11-20 2007-11-20 침지 여과용 중공사막, 이것을 이용한 침지 여과용 중공사막 모듈, 침지 여과 장치, 및 침지 여과 방법
JP2008545406A JP5795459B2 (ja) 2006-11-20 2007-11-20 浸漬濾過用中空糸膜、これを用いた浸漬濾過用中空糸膜モジュール、浸漬濾過装置、及び浸漬濾過方法
CN2007800426727A CN101541404B (zh) 2006-11-20 2007-11-20 浸渍过滤用中空丝膜、使用其的浸渍过滤用中空丝膜组件、浸渍过滤装置、以及浸渍过滤方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-313248 2006-11-20
JP2006313248 2006-11-20

Publications (1)

Publication Number Publication Date
WO2008062788A1 true WO2008062788A1 (fr) 2008-05-29

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PCT/JP2007/072458 WO2008062788A1 (fr) 2006-11-20 2007-11-20 Membrane à fibre creuse pour la filtration par immersion, module de membrane à fibre creuse pour la filtration par immersion utilisant celle-ci, appareil pour la filtration par immersion, et procédé de filtration par immersion

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JP (2) JP5795459B2 (fr)
KR (1) KR101156411B1 (fr)
CN (1) CN101541404B (fr)
WO (1) WO2008062788A1 (fr)

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JP2010188253A (ja) * 2009-02-17 2010-09-02 Asahi Kasei Chemicals Corp 中空糸多孔膜および水処理方法
WO2011129023A1 (fr) 2010-04-16 2011-10-20 旭化成ケミカルズ株式会社 Membrane à fibres creuses poreuse hétéromorphe, procédé de production de ladite membrane, module mettant en oeuvre ladite membrane, dispositif de filtration et procédé de traitement de l'eau
JP2012040464A (ja) * 2010-08-13 2012-03-01 Asahi Kasei Chemicals Corp 複合多孔性中空糸膜、膜モジュール、膜ろ過装置、水処理方法

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CN101862598A (zh) * 2010-06-25 2010-10-20 苏州顶裕节能设备有限公司 一种具有改进外壳结构的中空纤维超滤膜组件
KR20150064124A (ko) * 2012-09-28 2015-06-10 다우 글로벌 테크놀로지스 엘엘씨 내장 필터 모듈 및 통풍기를 포함하는 세척기
JP6607250B2 (ja) * 2016-01-22 2019-11-20 東レ株式会社 流体分離用炭素膜および流体分離用炭素膜モジュール
CN108499365B (zh) * 2018-03-26 2020-12-01 徐州云创物业服务有限公司 一种净水微孔滤膜管外壁自动清理装置
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