CN101541404A - Hollow-fiber membrane for immersion filtration, hollow-fiber membrane module for immersion filtration employing the same, apparatus for immersion filtration, and method of immersion filtration - Google Patents
Hollow-fiber membrane for immersion filtration, hollow-fiber membrane module for immersion filtration employing the same, apparatus for immersion filtration, and method of immersion filtration Download PDFInfo
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- CN101541404A CN101541404A CNA2007800426727A CN200780042672A CN101541404A CN 101541404 A CN101541404 A CN 101541404A CN A2007800426727 A CNA2007800426727 A CN A2007800426727A CN 200780042672 A CN200780042672 A CN 200780042672A CN 101541404 A CN101541404 A CN 101541404A
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- immersion
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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
- 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
Abstract
A hollow-fiber membrane for immersion filtration which has one or more protrudent parts on the outer surface; and a hollow-fiber membrane module for immersion filtration which is produced by bonding and fixing two or more such hollow-fiber membranes to a housing. Even when membrane filtration in a high-concentration suspension is continued, the effect of physically cleaning the membranes or module by air bubbling is high and an excess deposit is less apt to accumulate on the membrane surface. Consequently, the membranes and module suffer no decrease in water permeability during the continuation of operation.
Description
Technical field
The dipping that the present invention relates to be applicable to the liquid that dirt (particularly because the dirty material of organic matter cause) is high attract the immersion filtration that filters with hollow fiber membrane, use its immersion filtration hollow fiber membrane module, immersion filtration device and immersion filtration method.
The application is willing to 2006-313248 Japanese patent application opinion priority based on the spy on November 20th, 2006, quotes its content here.
Background technology
In recent years, in upper and lower conduit processing or industrial water drainage processing, hollow fiber membrane is immersed in the processed water, impurity is removed in separation from processed water " hollow fiber membrane filtration method " popularized.
But, people point out, there is such problem in " hollow fiber membrane filtration method ", because running for a long time, adhesion layers such as outstanding absurd creature matter in the outer surface generation processed water of hollow fiber membrane and organic substance, the obstruction of hollow fiber membrane takes place or stop up (fouling, aquatic organism dirt) by the stream that solid matter causes.The aquatic organism dirt brings the rising of intermembranous pressure or the reduction of filtration a fluid stream etc., and the overall operation efficient of water treatment system is brought harmful effect.
The running efficiency of the water treatment system that is caused by the aquatic organism dirt reduces to clean by the physics of hollow fiber membrane to be eliminated.For example, implement physics after the filtration operation at the appointed time and clean, repeat to filter the operation cycle method that operation and physics clean by introducing, can be within the specific limits with the extent control of aquatic organism dirt.Physics cleans to be had: the adverse current of membrane filtration water adverse current is cleaned; The primary side surface of hollow fiber membrane, promptly with face that processed water contacts on the cleaning (flushing flashing) of employing current; Make the air foaming of hollow fiber membrane vibration etc. by air, remove attachment material by physical action.
It is effective method that flushing in the above-mentioned physics cleaning method or air bubble reducing on the aquatic organism dirt, is obligato in that the filtration running is stablized on this point.When the outstanding absurd creature matter concentration in the processed water is high,, be necessary to improve the physics cleaning strength in order to obtain sufficient cleaning performance.
But physics cleaned strong, because the outstanding absurd creature matter friction in contact, the processed water between the hollow fiber membrane, the hollow fiber membrane surface is abraded, and according to circumstances occurs broken string sometimes.
In order to address this problem, people are studying the improvement of the shape and the intensity of hollow fiber membrane.
Be improved as the method for purpose as the shape with hollow fiber membrane, patent documentation 1 has been put down in writing the hollow fiber membrane that makes the shape tilt variation.According to patent documentation 1, by making the shape tilt variation of hollow fiber membrane, flowing pressure loss reduces than hollow fiber membrane in the past, the smoothing of permeate water velocity flow profile, and then with the relevant load of film part or pollute decentralized, therefore, the long-term possibility that becomes that turns round is filtered in foaming or back washing raising when implementing the film cleaning.
Again, be the method for purpose as improved strength with hollow fiber membrane, patent documentation 2 has been put down in writing the thread perforated membrane of a kind of polyethylene hollow, and it has specific viscosity average molecular weigh and molecular weight distribution, has specific pore structure simultaneously.
Patent documentation 1: Japanese patent laid-open 7-96152 communique
Patent documentation 2: the Japan Patent spy opens the 2001-269556 communique
Summary of the invention
The problem that invention will solve
But, the raising of the permeate water flow that incline structure causes though the hollow fiber membrane of patent documentation 1 can be expected, but patent documentation 1 does not have the particular content of open relevant raising run stability and cleaning, from the viewpoint of long-term run stability is also residual technical task is arranged.Again, in order to obtain such film, the complicated of hollow fiber membrane manufacturing process is inevitably, so productivity ratio is low, manufacturing cost is high.
Again, in the thread perforated membrane of the hollow of patent documentation 2, though can expect to improve the marresistance of outstanding turbid composition in the processed liquid, can produce the abrasion that cause owing to the contact between the thread perforated membrane of hollow but can suspect, say also there is not the technical solution problem from the viewpoint of long-term operation thus.Again, only just improve on the film-strength this point, the reduction of physics cleaning strength is difficult, does not also deal with problems at all.
The present invention In view of the foregoing finishes, purpose be to provide a kind of immersion filtration with hollow fiber membrane, use it immersion filtration with hollow fiber membrane module, immersion filtration device and immersion filtration method, even described immersion filtration continues the filtration of hollow fiber membrane in high-concentration turbid liquor with hollow fiber membrane, attachment also is difficult to be deposited in face, and can continue to filter running under the situation that water permeability does not reduce for a long time.
Solve the means of problem
The inventor concentrates on studies, and found that, by the outer surface at hollow fiber membrane jut is set, and when hollow fiber membrane was used for the immersion filtration of the high liquid of dirt, the cleaning of hollow fiber membrane outer surface was enhanced, and had finished the present invention.
That is, the present invention is the immersion filtration hollow fiber membrane that has the jut more than 1 at outer surface.
Again, the present invention is a plurality of above-mentioned immersion filtrations are bonded and fixed at shell (housing) with hollow fiber membrane an immersion filtration hollow fiber membrane module.
The present invention still is arranged on the immersion filtration device that floods in the tank with above-mentioned immersion filtration with hollow fiber membrane module.
Again, the present invention is a kind of immersion filtration method, this method is: fill up the dipping tank with processed water, the immersion filtration that a plurality of outer surfaces is had 1 above thrust is immersed in the processed water with hollow fiber membrane module with the immersion filtration that hollow fiber membrane is bonded and fixed on the shell, obtains filtered water from above-mentioned immersion filtration with the hollow bulb of hollow fiber membrane.
The invention effect
Be used for immersion filtration by the hollow fiber membrane that outer surface is had 1 above thrust, can improve the physics cleaning performance of film outer surface.Thus, even continue to carry out under the situation of membrane filtration in the suspension of high concentration, attachment also is difficult to excessively be deposited in outer surface, can not reduce lasting for a long time filtration running under the water permeability situation.
Description of drawings
Fig. 1: expression has the skeleton diagram of an example of embodiment of the hollow fiber membrane of jut.
Fig. 2: the skeleton diagram of an example of representing the embodiment of hollow fiber membrane module of the present invention.
Fig. 3: the figure that shows the immersion filtration test processing flow process of embodiment.
Fig. 4: the figure of the experimental result of expression embodiment.
Symbol description
11 denitrogenations of 1 shell, 2 fixing resins, 3 hollow fiber membranes, 4 outlet passes, 5 juts, 6 screen clothes, 7 flow adjustment tanks, 8 supply pumps, 9 stirring motors, 10 agitators are processed tank 25 denitrogenations sink drain (drain) 26 film immersion sink drain (drain) 27 air blast supply pumps 28 membrane filtration valves 29 back washing water valves with tank 12 circulating pumps 13 film immersion tanks 14 circulating water flow meters 15 supplying tubing 16 diffuser 17 mass air flow sensor, 18 air blasts (blower) 19 hollow fiber membrane module 20 back washpumps 21 pressure gauges 22 filter pumps 23 membrane filtration water ga(u)ges 24 films
The specific embodiment
Below, to the present invention, be that the center is specifically described particularly in mode preferably.
Fig. 1 is that the expression outer surface has the figure of the immersion filtration of jut with an example of the embodiment of hollow fiber membrane.Immersion filtration is with in the hollow fiber membrane 3, and it is very important having jut 5 at outer surface.
Immersion filtration with jut 5 both can overlap jut 5 to the hollow fiber membrane that does not have raised structures from behind with the manufacture method of hollow fiber membrane 3, can when making immersion filtration, figuration be shape also with jut 5 with hollow fiber membrane 3, but, figuration is better when making immersion filtration with hollow fiber membrane 3, because can reduce manufacturing step and manufacturing cost like this.
The shape of jut 5 is so long as have the shape of jut and just be not particularly limited on the outer surface of immersion filtration with hollow fiber membrane 3, but be preferably structure as shown in Figure 1, promptly, has the jut 5 that has continuous shape more than 1 in the longitudinal direction at immersion filtration with the outer surface of hollow fiber membrane 3, because like this can steady and continuous ground make a large amount of immersion filtrations with hollow fiber membrane 3.
Have in the longitudinal direction continuously that the quantity of the jut 5 of shape is not particularly limited, when disposing a plurality of immersion filtrations with hollow fiber membrane 3, for effectively obtain for the cleaning performance of the hollow fiber membrane of adjacency on every side, be preferably and have more than 8.
On the other hand, the quantity of jut 5 is too much, has such worry, the filtration treatment ability drop that reduces to cause with the effective filtration area of hollow fiber membrane 3 owing to immersion filtration.Therefore, the quantity that is preferably jut 5 is adjusted into, under the situation of removing jut 5, with respect to immersion filtration with the outer surface of hollow fiber membrane 3, jut 5 is 1～20% scope to the projected area ratio of this outer surface.
This be because, be more than 1% by making the projected area ratio, just have the tendency of the cleaning performance that demonstrates the excellence that jut 5 causes.Be more preferably more than 5%.
Again, this be because, be below 20% by making the projected area ratio, just have and take into account the cleaning performance that jut 5 causes and the tendency of above-mentioned filtration treatment ability.Be more preferably below 15%.
Again, peel off, discharge for the attachment that makes the film surface that is deposited in hollow fiber membrane 3 is easy to clean by physics, to be preferably jut 5 for from being parallel in shape till front end plays in the foundation portion of jut 5 or from being the shape of width reduction till front end plays in foundation portion.
The raised structures that is provided with on the periphery of immersion filtration with hollow fiber membrane 3, by making the discontinuous while of attachment layer that is deposited in outer surface, contact with the attachment of the immersion filtration that exceedingly is deposited in adjacency, remove thereby its physics is peeled off with hollow fiber membrane 3 outer surfaces.Therefore, in jut 5, attachment is not piled up for well, makes the significantly reduced structure of filtering function so be preferably, and being more preferably does not have filtering function basically.
The width of jut 5 is not particularly limited, and is preferably more than the 5 μ m.This is because be more than the 5 μ m by the width that makes jut 5, because the waving or impact the distortion of the jut 5 that causes mutually or damaged the tendency that becomes difficulty arranged with hollow fiber membrane 3 of the immersion filtration in filtering.Again, such tendency is arranged also, the dimensionally stable of the jut 5 when hollow fiber membrane is made, immersion filtration improves with the productivity ratio of hollow fiber membrane 3.Be more preferably more than the 15 μ m.
Again, the width of jut 5 is not particularly limited, and is preferably below the 50 μ m.This be because, by being below the 50 μ m, can keep immersion filtration with the effective filtration area of hollow fiber membrane 3, can expect excellent film surface clean effect simultaneously.Be more preferably below the 40 μ m.
The interval of jut 5 can suit to select as required, considers the cleaning homogenization on film surface, and jut 5 is better with roughly equidistantly disposing on the outer surface of hollow fiber membrane 3 at immersion filtration.
Interval to jut 5 is not particularly limited, but in order to obtain excellent film surface clean effect, it is desirable to compare with the attachment layer of the outer surface of hollow fiber membrane 3 with being deposited in immersion filtration, and is high fully.
Though being deposited in immersion filtration can be because the water quality of processed water be different with the attachment layer and the height thereof of the outer surface of hollow fiber membrane 3, but particularly the particle concentration in processed water is than in the higher following draining purposes, and the height that makes jut 5 is that 5 μ m are better above.Be more preferably more than the 10 μ m.
Again, the height of jut 5 is not particularly limited, and is preferably to be below 3 times of its foundation part.This be because, by below 3 times, have tendency be difficult to filter in immersion filtration waving or the distortion or the breakage of the jut 5 that each other collision causes with hollow fiber membrane 3.Be more preferably below 2 times.
The outer surface of the hollow fiber membrane the when height of jut 5 of the present invention is meant beyond removing jut is to the distance the front end of jut.
From the aspect of shape stability, operability, immersion filtration of the present invention is better at 50～1000 mu m ranges with the internal diameter of hollow fiber membrane 3, does not have the thickness of part of jut 5 better in the scope of 5～300 μ m.
Immersion filtration of the present invention contraryly soaks into film, super times filter membrane, secondary filter film and large aperture film with what the aperture of hollow fiber membrane 3 can be used for generally knowing, but is preferably 0.005～5 mu m range that can be used as super times filter membrane, secondary filter film and large aperture film.
Again, immersion filtration is not particularly limited with the material of hollow fiber membrane 3, can exemplify polysulfones, polyether sulfone, polyacrylonitrile, polyimides, PEI, polyamide, polyether-ketone, polyether-ether-ketone, polyethylene, polypropylene, poly--the 4-methylpentene, cellulose, cellulose acetate, Kynoar, polyethylene-TFE copolymer, polytetrafluoroethylene (PTFE) etc.Also can use their composite.
For the hollow fiber membrane that does not have raised structures, when jut is overlapped from behind, can be respectively different materials, consider sealing between hollow fiber membrane and the jut 5 etc., be preferably the use identical materials.
Fig. 2 is that the immersion filtration of the present invention figure of the immersion filtration of hollow fiber membrane 3 with an example of the embodiment of hollow fiber membrane module used in expression.
Immersion filtration of the present invention can obtain by such manufacture method with hollow fiber membrane module 19 among Fig. 2, a plurality of immersion filtrations are sheet with hollow fiber membrane 3 by constriction, immersion filtration keeps open state with the one at least of the end of hollow fiber membrane 3, be configured in shell 1, pour into a mould with resin 2 by this hollow fiber membrane bundle is bonded and fixed at the fixing of this shell 1 with outlet pass 4.
At least one end of shell 1 is provided with pipe arrangement, described pipe arrangement with by in wrap in that the internal flow path that being used in the shell 1 allow treatment fluid pass through is connected, outside opening.
Immersion filtration of the present invention can be the bundles of immersion filtration with hollow fiber membrane 3 simple merging with hollow fiber membrane module 19 employed hollow fiber membrane bundles, but from the viewpoint of the processability of hollow fiber membrane module 19, can suitably use many of hollow fiber membrane bundle to be wound on the roll of housing body, hollow fiber membrane 3 is used as the braid of weft yarn or layered product of this braid lamination of multi-disc and so on.The form of these hollow fiber membranes can suitably be selected with hollow fiber membrane 3 according to employed immersion filtration.
As the material of immersion filtration of the present invention with hollow fiber membrane module 19 employed shells 1, get final product so long as have the material of mechanical strength and durability, for example, Merlon, polysulfones, polyolefin, PVC (polyvinyl chloride), acrylic resin, ABS resin, MODIFIED PP E (polyphenylene oxide) etc.In the time of must carrying out sintering processes after the use, do not produce when using burning toxic gas, can completing combustion hydrocarbon resins such as polyolefin be advisable.
As mentioned above, immersion filtration is fixed by the fixing state that keeps opening surface, while to be communicated with internal flow path with opening surface respectively with resin 2 in shell 1 with hollow fiber membrane 3.
The fixing resin 2 of using used herein can use epoxy resin, polyurethane resin, epoxidation propylene acid ester resin, silicones, various thermoplastic resins etc., can suit to select.
The fixing viscosity with resin 2 (20 ℃) of immersion filtration during with the fixing operation of hollow fiber membrane 3 is not particularly limited, but be preferably to below the 5000mPas, because like this, fixing become to be easy to contain with resin 2 be immersed between a plurality of immersion filtrations usefulness hollow fiber membranes 3.Be more preferably below the 3000mPas.
Above-mentioned hollow fiber membrane bundle pour into a mould with resin 2 with fixing,, can be used centrifugal mull technique or leave standstill known method such as mull technique as the method for fixing with shell 1 bonding.Want to improve under the fixing sclerosis contraction or the situation of intensity with resin 2, can make this fixing with containing powder bodies such as fibrous materials such as glass fibre, carbon fiber, carbon black, aluminium oxide, silica in the resin 2.
Immersion filtration of the present invention is arranged in the immersion filtration device with hollow fiber membrane module 19, when implementing immersion filtration, is preferably at described immersion filtration and diffusing device of air is set with the bottom of hollow fiber membrane module 19.Thus, near the outstanding absurd creature matter that is easy to be concentrated face by immersion filtration is discharged to outside the assembly by bubble.
Under such situation, immersion filtration is stable for a long time, and the physics of hollow fiber membrane cleans the tendency of carrying out more effectively, therefore, immersion filtration is preferably not cover with hollow fiber membrane module 19, and the distance between the shell 1 at two ends is better fixing by the supporter of the bonding fixed part that connects two ends.
Immersion filtration of the present invention is with in the hollow fiber membrane module 19, in order to improve the filter capacity of per unit volume, simultaneously for improve the cleaning efficiency of bubble, be preferably make immersion filtration with the filling rate of hollow fiber membrane 3 in 25～70% scope.
Again, have the Rolling of appropriateness, the film surface clean effect of acquisition excellence in order to make immersion filtration with hollow fiber membrane 3, the immersion filtration between the shell 1 is preferably more than 0.5% with the relaxation rate of hollow fiber membrane 3.On the other hand, overrelaxation, immersion filtration have with hollow fiber membrane 3 be easy to the tendency that bends or damage in immersion filtrations, and therefore, relaxation rate is for well below 5%.
In order to make immersion filtration wave, obtain the physics cleaning performance fully with hollow fiber membrane 3, carry out air when bubbling from immersion filtration with the bottom of hollow fiber membrane module 19, particle concentration in processed water is than in the higher following draining purposes, and the long-pending air quantity delivered of the per unit projection bed surface of assembly is 50m
3/ m
2/ h is better above.On the other hand, excessive bubble can become the immersion filtration bending of hollow fiber membrane 3 and the reason of damage, the tendency that has energy consumption to increase simultaneously, and therefore, the air quantity delivered is 200m
3/ m
2/ h is following for well.
Can in immersion filtration, implement bubble continuously.Again, as required, carry out immersion filtration and bubble repeatedly, adopt cycle operation also can with certain interval.
With in the hollow fiber membrane module 19, it is important having jut 5 at each immersion filtration with the outer surface of hollow fiber membrane 3 at immersion filtration of the present invention.By the immersion filtration that caused by the bubble vibration and sway with hollow fiber membrane 3, the attachment on the outer surface of jut 5 and the hollow fiber membrane 3 that excessively is deposited in adjacency contacts, and can be removed effectively.
By described jut 5, when a plurality of immersion filtrations wave with hollow fiber membrane 3, effective filtration fraction between the hollow fiber membrane of adjacency becomes and is difficult to direct contact, therefore, the deposit that can prevent effective filtration fraction is by excessively densification, attachment can effectively be peeled off the deposit except that the striping surface to strong set of minute aperture of effective filtration fraction etc.
By forming jut 5, effective filtering component of hollow fiber membrane circumferencial direction is formed discontinuously again.
Thus, effectively the deposit on the filtration fraction also becomes discontinuous at the circumferencial direction of hollow fiber membrane, and the cohesive force between the deposit descends, and therefore, peels off by bubble etc. and to remove deposit and have to become and be easy to tendency.
The present invention is applicable to various immersion filtration modes, for example, also can be used to flood pressure filtration, but more is applicable to the high liquid of dirt to be the dipping attraction filtration of object as mentioned above.The present invention especially goes for upper and lower water course and handles purposes or industrial water drainage processing purposes.Immersion filtration of the present invention is immersed in the processed water with hollow fiber membrane module,, can obtains filtered water from this hollow bulb by to of the hollow bulb decompression of above-mentioned immersion filtration with hollow fiber membrane.
Embodiment
(embodiment 1)
The macaroni yarn figuration that has 12 place's otch with double-sleeve structure, in outer peripheral portion with discharge opening footpath 25mm, interior circumferential weld gap length degree 4.0mm with nozzle self-primingly to density 0.96g/cm
3, molten flow rate 1.0g/10min high density polyethylene (HDPE)-ノ バ テ Star Network HD HY540 (Japan Polyethylene Corp.'s system) import air, dissolve spinning with 165 ℃ of spinning temperatures, coiling speed 70m/min, obtain on periphery, having the not extension macaroni yarn of 12 continuous along its length juts.
The described macaroni yarn that do not extend is carried out 80% cold extension, then, carry out heat between 113 ℃ the slit heater and extend and become 600% with being heated to, and then the slit heater that usefulness is heated to temperature carries out porous materialization until total elongation.
The hollow fiber membrane that obtains like this, the height 19 μ m of internal diameter 354 μ m, the thickness 100 μ m that do not have the part of protuberance, void content 72%, jut, the width 20 μ m of jut.
At this moment, with respect to being 14% to the projected area ratio of this outer surface at the jut outer surface of removing the hollow fiber membrane under the situation of jut, above-mentioned.
With the described dipping of 4800 bundles hollow fiber membrane boundling, make as shown in Figure 2 film effective length 403mm, membrane area 3m
2The immersion filtration hollow fiber membrane module.
At this moment, the filling rate in the place that hollow fiber membrane is the closeest is 60%, and relaxation rate is 1.5%.
(comparative example 1)
Use has the macaroni yarn figuration nozzle of the double-sleeve structure of the bore 25mm that spues, interior circumferential weld gap length degree 4.0mm, and other conditions are the same with embodiment 1, obtains the hollow fiber membrane that does not have jut of internal diameter 354 μ m, thickness 100 μ m and void content 72%.
With this hollow fiber membrane boundling, under condition similarly to Example 1, make the immersion filtration hollow fiber membrane module.
[immersion filtration test]
Use respectively at interval 18mm, 20 to be arranged in incorporate unit,, the hollow fiber membrane module of embodiment 1 and comparative example 1 is implemented the immersion filtration test according to the described flow process of Fig. 3 by water processing establishment down.
Among Fig. 3, the former water that flows into screen cloth 6 temporarily is trapped in flow and adjusts in the groove 7 after foreign material is removed, and then, uses supply pump 8, is supplied to denitrogenation with in the tank 11.Be supplied to the former water of denitrogenation, enter film immersion tank 13, circulate with specific circulating ratio by circulating pump 12 by supplying tubing 15 with tank 11.
Former water is purified by biology by activated sludge in tank 11 and film immersion tank 13 in denitrogenation.Removing of nitrogen component is by making mud circulation between denitrogenation is with tank 11 and film immersion tank 13 in the former water, and promptly so-called nitrated denitrification reaction carries out.Organic matter in the former water (BOD) mainly is to be decomposed by aerobic oxidation by the air of being discharged by the air discharge portion that is configured in the diffuser 16 in the film immersion tank 13.
Again, utilized the air discharge of diffuser 16 to carry out for a long time by air blast 18, the physics cleaning method that also can be used as hollow fiber membrane module 19 uses in the lump.
The water that is cleaned is separated from activated sludge by utilizing the membrane filtration of hollow fiber membrane 19.The water that is filtered is supplied to film by filter pump 22 and handles tank 24, and released as handling water in the sterilization back as required.
In this test, employing will be handled the recovery side of water and pass through the attraction filtration at intermittence that filter pump 22 intermittently attracts and filters, and attract to filter as 1 enforcement running that circulates 1 minute intermittence with filtration time 7 minutes and dwell time.
The immersion filtration test is with activated sludge concentration 8000mg/L, the filtering traffic 0.23m of per unit membrane area in the test
3/ m
2/ d, the long-pending 120m of the bubble per unit projection bed surface that is used to clean
3/ m
2/ h carries out continuously.Again, make the incorporate unit of hollow fiber membrane module of embodiment 1 or comparative example 1, with both the unit simultaneously, in identical dipping tank, under identical operating condition parallel running, the film differential pressure of measuring at that time changes.The results are shown in Fig. 4.
According to Fig. 4, can confirm, make the incorporate unit of hollow fiber membrane module (embodiment 1) with jut, compare with the incorporate unit of the hollow fiber membrane module that does not have jut (comparative example 1), although under identical operating condition, but the rising of its film differential pressure is suppressed, the hollow fiber membrane that has jut by the outer surface that uses various hollow fiber membranes, even during the membrane filtration in continuing to carry out the suspension of high concentration, also can improve the physics cleaning performance that bubble causes, be difficult to produce the excessive accumulation of attachment on face, can continuous running under the situation that does not reduce water permeability.
Industrial practicality
Can provide according to the present invention a kind of immersion filtration with hollow fiber membrane, use it immersion filtration with hollow fiber membrane module, Immersion filtration device and immersion filtration method, described immersion filtration hollow fiber membrane, its water purification, water for industrial use, Xia Shui, In the immersion filtration of the processing of stool and urine, industrial water drainage etc. and merging purification tank etc., need not use unnecessary cleaning energy, just Can reduce the film water biofouling that adhesion layer, obstruction, the solid content of outstanding absurd creature matter in the former water and organic substance etc. cause, Suppressing differential pressure rises.
Claims (11)
1. an immersion filtration hollow fiber membrane has 1 above jut on the outer surface.
2. according to the immersion filtration hollow fiber membrane of claim 1 record, above-mentioned jut has continuous shape on the length direction of hollow fiber membrane.
3. according to the immersion filtration hollow fiber membrane of claim 1 record, the height of above-mentioned jut is more than the 5 μ m.
4. according to the immersion filtration hollow fiber membrane of claim 1 record, the width of above-mentioned jut is more than the 5 μ m.
5. according to the immersion filtration hollow fiber membrane of claim 1 record, removing under the situation of above-mentioned jut, with respect to the outer surface of hollow fiber membrane, above-mentioned jut to the projected area ratio of this outer surface in 1～20% scope.
6. immersion filtration hollow fiber membrane module, a plurality of immersion filtrations that have 1 above jut are on the outer surface fixed with hollow fiber membrane and shells bonding.
7. an immersion filtration device is provided with the immersion filtration hollow fiber membrane module that claim 6 is put down in writing in the dipping tank.
8. according to the immersion filtration device of claim 7 record, above-mentioned immersion filtration has diffusing device of air with the bottom of hollow fiber membrane module.
9. immersion filtration method, described immersion filtration method is, fill the dipping tank with processed water, a plurality of dippings that have 1 above jut on the outer surface are immersed in the processed water with hollow fiber membrane module with the fixing immersion filtration of hollow fiber membrane and shell bonding, obtain filtered water with the hollow bulb of hollow fiber membrane from above-mentioned immersion filtration.
10. according to the immersion filtration method of claim 9 record,, used of the filtration of above-mentioned immersion filtration with hollow fiber membrane when the device of air that looses bubbles.
11.,, used above-mentioned immersion filtration to filter with the attraction of hollow fiber membrane by with of the hollow bulb decompression of above-mentioned immersion filtration with hollow fiber membrane according to the immersion filtration method of claim 9 or 10 records.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP313248/2006 | 2006-11-20 | ||
| JP2006313248 | 2006-11-20 | ||
| PCT/JP2007/072458 WO2008062788A1 (en) | 2006-11-20 | 2007-11-20 | Hollow-fiber membrane for immersion filtration, hollow-fiber membrane module for immersion filtration employing the same, apparatus for immersion filtration, and method of immersion filtration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101541404A true CN101541404A (en) | 2009-09-23 |
| CN101541404B CN101541404B (en) | 2012-06-27 |
Family
ID=39429718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800426727A Expired - Fee Related CN101541404B (en) | 2006-11-20 | 2007-11-20 | Hollow-fiber membrane for immersion filtration, hollow-fiber membrane module for immersion filtration employing the same, apparatus for immersion filtration, and method of immersion filtration |
Country Status (4)
| Country | Link |
|---|---|
| JP (2) | JP5795459B2 (en) |
| KR (1) | KR101156411B1 (en) |
| CN (1) | CN101541404B (en) |
| WO (1) | WO2008062788A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862598A (en) * | 2010-06-25 | 2010-10-20 | 苏州顶裕节能设备有限公司 | Hollow fiber ultra-filtration membrane assembly having improved shell structure |
| WO2014047896A1 (en) * | 2012-09-28 | 2014-04-03 | Dow Global Technologies Llc | Washing maching including integral filter module and aerator |
| CN108499365A (en) * | 2018-03-26 | 2018-09-07 | 湖州科滤膜技术有限公司 | A kind of water purification miillpore filter pipe outer wall automatic cleaning apparatus |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5630961B2 (en) * | 2009-02-17 | 2014-11-26 | 旭化成ケミカルズ株式会社 | Hollow fiber porous membrane and water treatment method |
| AU2010344678A1 (en) * | 2010-04-16 | 2011-11-03 | Asahi Kasei Chemicals Corporation | Deformed porous hollow fiber membrane, production method of deformed porous hollow fiber membrane, and module, filtration device, and water treatment method in which deformed porous hollow fiber membrane is used |
| JP5626865B2 (en) * | 2010-08-13 | 2014-11-19 | 旭化成ケミカルズ株式会社 | Composite porous hollow fiber membrane, membrane module, membrane filtration device, water treatment method |
| WO2017126504A1 (en) * | 2016-01-22 | 2017-07-27 | 東レ株式会社 | Carbon membrane for fluid separation and carbon membrane module for fluid separation |
| JP7462549B2 (en) | 2020-12-23 | 2024-04-05 | 株式会社クボタ | Method for detecting abnormalities in a submerged membrane separation device |
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|---|---|---|---|---|
| DE2842958A1 (en) * | 1978-10-02 | 1980-04-10 | Akzo Gmbh | Dialysis membrane comprising hollow cellulose fibre - with improved exchange surface in wavy form, mfd. from cuprammonium soln. of cellulose |
| JPS56148907A (en) * | 1980-04-15 | 1981-11-18 | Nippon Zeon Co Ltd | Hollow fiber |
| JPS58169510A (en) | 1981-11-27 | 1983-10-06 | Asahi Medical Kk | Hollow fiber with modified cross section and hollow fiber module therefrom |
| JPS60143780U (en) * | 1984-03-06 | 1985-09-24 | 株式会社 ニツシヨ− | hollow fiber |
| JPS62225206A (en) * | 1986-03-25 | 1987-10-03 | Mitsubishi Rayon Co Ltd | Modified cross-section porous hollow yarn membrane |
| JPS6321914A (en) * | 1986-07-08 | 1988-01-29 | Mitsubishi Rayon Co Ltd | Porous hollow yarn membrane of modified cross section |
| JPH062721Y2 (en) * | 1988-02-05 | 1994-01-26 | 株式会社クラベ | Silicone rubber tube assembly for liquid flow passage of deaerator |
| JP2805873B2 (en) * | 1989-08-04 | 1998-09-30 | 東洋紡績株式会社 | Hollow fiber type plasma separation membrane |
| JPH09266947A (en) * | 1996-04-02 | 1997-10-14 | Teijin Ltd | Hollow fiber membrane and module for dialysis |
| AU2003209410A1 (en) * | 2002-01-29 | 2003-09-02 | Amersham Biosciences Membrane Separations Corp. | Convoluted surface hollow fiber membranes |
| JP4906269B2 (en) * | 2005-04-27 | 2012-03-28 | 前澤工業株式会社 | Filtration device |
-
2007
- 2007-11-20 KR KR1020097010006A patent/KR101156411B1/en not_active IP Right Cessation
- 2007-11-20 JP JP2008545406A patent/JP5795459B2/en not_active Expired - Fee Related
- 2007-11-20 CN CN2007800426727A patent/CN101541404B/en not_active Expired - Fee Related
- 2007-11-20 WO PCT/JP2007/072458 patent/WO2008062788A1/en active Application Filing
-
2014
- 2014-07-18 JP JP2014148323A patent/JP2014231059A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862598A (en) * | 2010-06-25 | 2010-10-20 | 苏州顶裕节能设备有限公司 | Hollow fiber ultra-filtration membrane assembly having improved shell structure |
| WO2014047896A1 (en) * | 2012-09-28 | 2014-04-03 | Dow Global Technologies Llc | Washing maching including integral filter module and aerator |
| CN104854271A (en) * | 2012-09-28 | 2015-08-19 | 陶氏环球技术有限责任公司 | Washing maching including integral filter module and aerator |
| EP2900859A4 (en) * | 2012-09-28 | 2016-06-01 | Dow Global Technologies Llc | Washing maching including integral filter module and aerator |
| CN108499365A (en) * | 2018-03-26 | 2018-09-07 | 湖州科滤膜技术有限公司 | A kind of water purification miillpore filter pipe outer wall automatic cleaning apparatus |
| CN108499365B (en) * | 2018-03-26 | 2020-12-01 | 徐州云创物业服务有限公司 | Automatic cleaning device for outer wall of water purification microporous filter membrane pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101541404B (en) | 2012-06-27 |
| KR101156411B1 (en) | 2012-06-13 |
| JP2014231059A (en) | 2014-12-11 |
| JPWO2008062788A1 (en) | 2010-03-04 |
| WO2008062788A1 (en) | 2008-05-29 |
| JP5795459B2 (en) | 2015-10-14 |
| KR20090071643A (en) | 2009-07-01 |
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