CN1197409A - Filter element - Google Patents
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- CN1197409A CN1197409A CN97190869.9A CN97190869A CN1197409A CN 1197409 A CN1197409 A CN 1197409A CN 97190869 A CN97190869 A CN 97190869A CN 1197409 A CN1197409 A CN 1197409A
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- Prior art keywords
- filter element
- spot bonding
- film
- filter
- membrane
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- 239000012528 membrane Substances 0.000 claims abstract description 35
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 34
- 239000000057 synthetic resin Substances 0.000 claims abstract description 34
- 239000000835 fiber Substances 0.000 claims description 25
- 239000004744 fabric Substances 0.000 claims description 21
- 230000008595 infiltration Effects 0.000 claims description 19
- 238000001764 infiltration Methods 0.000 claims description 19
- 238000010008 shearing Methods 0.000 claims description 17
- 239000002759 woven fabric Substances 0.000 claims description 12
- 239000004705 High-molecular-weight polyethylene Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 abstract description 36
- 239000002351 wastewater Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
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- 239000007788 liquid Substances 0.000 description 22
- -1 polyethylene Polymers 0.000 description 18
- 239000004698 Polyethylene Substances 0.000 description 14
- 229920000573 polyethylene Polymers 0.000 description 14
- 238000003475 lamination Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 238000003754 machining Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
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- 239000003651 drinking water Substances 0.000 description 3
- 235000020188 drinking water Nutrition 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
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- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
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- 229920003023 plastic Polymers 0.000 description 1
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- 229920002492 poly(sulfone) Polymers 0.000 description 1
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- 239000003381 stabilizer Substances 0.000 description 1
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- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
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Images
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
- B01D69/10—Supported membranes; Membrane supports
- B01D69/107—Organic support material
- B01D69/1071—Woven, non-woven or net mesh
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention provides a filter element which is excellent in operability in the production of parts and modules for membrane separation, has a high porosity and a high filtering ability, and is excellent in durability when used as a filter for treating waste water. A filter element comprises a synthetic resin porous filtration membrane and a water-permeable reinforcing layer laminated on the membrane, wherein the filtration membrane and the water-permeable layer are connected by dot-like adhesion dispersed in an interfacial phase between the layers, 1cm at any part of the interfacial phase2The spot-shaped bonding area on the area is 0.05-0.35 cm2In the meantime.
Description
Invention field
The present invention relates to a kind of filter element, relate more specifically to a kind of filter element that is applicable to the film isolation technics, the occasions such as cleaning that this element can be applicable to handle waste water or guarantee drinking water when meeting with natural calamity and field work.
Background of invention
In wastewater treatment, used multiple multi-hole filtering film as filter course.These multi-hole filtering films are laid down on the frame body so that use.The most important thing is, a kind of porous synthetic resin film that comprises High molecular weight polyethylene, owing to have a porosity height, advantage such as filter capacity is strong and economical and practical has been used in sizable scope.(for example, referring to Japan Patent TOKKAI-HEINo.2-232242 (1990), TOKKAI-HEI No.5-98065 (1993), TOKKAI-HEI No.5-239246 (1993) and TOKKAI-HEI No.5-245923 (1993))
This poly porous synthetic resin film that comprises with high porosity and excellent filter capacity, because it comprises a kind of ultra high molecular weight polyethylene and makes by high elongation, therefore, still can make film at the machine draw direction with laterally all have goodish tensile strength although it has very high porosity; But owing to fiber non-woven tissue wherein forms on thickness direction, so although very pliable and tough its shearing strength of this resin molding is very low.Therefore, when use this polyethylene porous synthetic resin film production that is layered on the frame body be used for the film separated components and and then during with this parts making module, need SC during film processed.For example, when being hooked by little ridge, film just is easy to problems such as appearance separates with the top layer.And when the module of dress filter element carried out wastewater treatment in use is this, the foreign matter in the waste water can be trapped on the superficial layer; And when using big quantity of fluid to remove contamination, the FF in the filter element film can be destroyed by rush of water, and so repeatedly washes rear film itself also can destroy-and this can not satisfy actual needs.The problem that same nature also can occur.
Has the module that the porous synthetic resin film of high porosity and excellent filter capacity is made in use, when abnormal pressure appears in the process that is used for filtering big quantity of fluid, or, should make pressure distribution on whole filter membrane surface having filtered behind the certain quantity of fluid to the assembly pressurization to remove the dirt that is deposited on the filter element promptly when " afterwards washing ".To fulfill this requirement, film itself will have suitable rigidity, thereby improves reusable durability.
When using filter membrane usually, it is commonplace that it is layered on the way on the supporter.Obviously, the supporter of filter membrane makes the liquid infiltration in the past than filter membrane itself is easier.At present, use a kind of polyester not have imitative fiber and do supporter, and it has been carried out many improvement.For example, disclose a kind of supporter of making at double-decker upper berth multilayer non-woven fibre on the Japanese patent gazette No.TOKKO-HEI No.4-21526 (1992), this double-decker comprises; There is big opening on preceding top layer and uses the crude fibre surface and have bigger roughness on this layer; There is a smaller opening on back top layer and has the cramped construction that uses fine fibre on this layer.Yet, this multilayer non-woven fibre of forming by staple fibre, when being used to reduce it as the filter membrane supporter, the difference on thickness and penetrating power; And this multilayer non-woven fibre is not attempted to solve the porous synthetic resin film of being made by the polyethylene with high porosity and good filter capacity when this kind and is used as the problem that filter membrane brings.At present, the problems referred to above still have to be solved.
Summary of the invention
The invention is intended to solve the existing problem of traditional multi-hole filtering film that use is made by the polyethylene porous synthetic resin film with high porosity and good filter capacity, and then guarantee improving with the operability of porous synthetic resin film preparation when carrying out film separated components and module, make porous filter elements have excellent durability simultaneously, make when a large amount of fluid of long time treatment, in wastewater treatment, still guarantee stable filter effect, and can not damage filter element.
Inventor of the present invention is finding for addressing these problems in the research of carrying out: can solve these problems with the way that the method for enhancement Layer by spot bonding that will seep water under given conditions is laminated on the porous synthetic resin film.This discovery has caused the present invention.
The invention provides the embodiment of following several filter elements:
(1) a kind of filter element, comprise the multi-hole filtering film that one deck synthetic resin is made and be pressed onto infiltration enhancement Layer on the filter membrane from level to level, wherein connect by being dispersed in the spot bonding of going up mutually at the lamination interface between film and the permeable layer, the area of spot bonding is all in the scope of 0.05～0.35 square centimeter every square centimeter interface phase on the phase arbitrary portion of interface.
(2) a kind of as (1) described filter element, wherein spot bonding is that circular point shape is bonding.
(3) a kind of as (1) described filter element, wherein spot bonding is linear bonding.
(4) a kind of as (1) described filter element, wherein spot bonding is that polygon is bonding.
(5) a kind of as (1) described filter element, wherein spot bonding is cancellated bonding for having.
(6) a kind of as (1) arrives arbitrary described filter element in (5), and wherein the seepage rate of filtration membrane is 1 to 10CC/min./cm
2
(7) a kind of as (6) described filter element, wherein filtration membrane comprises a kind of molecular weight 5 * 10
5To 7 * 10
6Between High molecular weight polyethylene, and a large amount of very tiny holes are arranged wherein, make porosity reach 60% to 90%, and the diameter in each hole is between 0.1 to 0.2 micron, this filtration membrane machining direction and laterally both direction at least tensile strength and the shearing strength on the one be respectively more than the 3.5kg/5cm, between 5 to 50 grams.
(8) a kind of as arbitrary described filter element in (1) to (5), wherein permeable layer shearing strength at least one direction in machining direction and horizontal two directions is more than the 0.2kg.
(9) a kind of as (8) described filter element, wherein permeable layer is made with fiber cloth.
(10) a kind of as (9) described filter element, wherein fiber cloth is a woven fabric.
(11) a kind of as (9) described filter element, wherein fiber cloth is the adhesive-bonded fabric that comprises continuous fiber.
(12) a kind of as (8) described filter element, wherein permeable layer is one deck perforated membrane.
The accompanying drawing summary
Fig. 1 is the perspective illustration of a kind of embodiment of filter element, according to lamination on this filter element of the present invention one deck woven fabric as the infiltration enhancement Layer;
Fig. 2 is the perspective illustration of filter element another embodiment, according to lamination on this filter element of the present invention one deck perforated membrane as the infiltration enhancement Layer;
Fig. 3 is the schematic diagram that the spot bonding of the different shape that scatters is gone up at lamination of the present invention interface mutually;
Fig. 4 is a kind of perspective view of filtration treatment parts embodiment, and the filter element of making according to the principle of the invention is housed in these parts;
Fig. 5 be Fig. 4 at the A-A place cutaway view along the direction of arrow;
Fig. 6 is the perspective view of a kind of embodiment of the stiffener that uses in the filtration treatment parts, and the filter element of making according to the principle of the invention is housed in these parts;
Fig. 7 is the perspective view of a kind of embodiment of the filter course that uses in the filtration treatment parts, and the filter element of making according to the principle of the invention is housed in these parts;
Fig. 8 is the perspective view of a kind of embodiment of filtration treatment parts, and the filter element of making according to the principle of the invention is housed in these parts;
Fig. 9 be Fig. 8 at the A-A place cutaway view along the direction of arrow.
More than among each figure, label refers to respectively as lower member:
1. filter element
2. synthetic resin multi-hole filtering film
3. enhancement Layer (woven fabric) seeps water
4. enhancement Layer (perforated membrane) seeps water
(a) circular point shape spot bonding
(b) linear spot bonding
(c) polygon spot bonding
(d) netted spot bonding
11. frame body
12. dictyosome
13. felt
14. liquid outlet
15. permeability hole
16. stiffener
17. the space in the stiffener
18. the liquid outlet that filtration treatment part liquid outlet links to each other
19. filter element
21. bag
22. setting frame
23. liquid outlet
24. hermetic unit
25. water stream channel
Detailed Description Of The Invention
The porous synthetic resin film can be made with the various porous membranes that comprise polytetrafluoroethylene (PTFE), polysulfones or High molecular weight polyethylene, and its seepage rate is preferably in 1 to 10cc/min./cm2Between. The seepage rate characteristic here is by with 0.5kg/cm2Pressure next minute inner penetration is crossed synthetic resin film, and (the pure water amount of area: 4.7cm * 4.7cm) is scaled with " cc/min./cm2" obtain for the value of unit. For reaching above-mentioned seepage rate, the porous synthetic resin film preferably has many very tiny holes, so that porosity reaches 60% to 90%, and the diameter in hole is 0.1 to 0.2 micron.
Porosity calculates according to following formula herein, and wherein the density of raw material is (ρ o) before the processing, and the density of synthetic resin film is (ρ) after the mold pressing:
Porosity (%)=(1-ρ/ρ o) * 100
If the diameter in hole is too small, clogging can be occurred and sufficiently long service life can't be guaranteed, make the filter capacity variation if the diameter in hole is excessive. Diameter and the quantity of appropriate selecting hole can make the porous synthetic resin film have suitable porosity and the seepage rate that gears to actual circumstances. This makes porous filter elements of the present invention can present maximum filter capacity.
Especially, preferably use to comprise and have 5 * 105To 7 * 106The porous membrane of the ultra-high molecular weight polyethylene of molecular weight. If molecular weight is excessive, then difficulty is molded into porous membrane, and if molecular weight is too small, the intensity of porous membrane can diminish, and is difficult to obtain having the high porosity film of excellent filter capacity.
And, polyethylene also may with a small amount of (it is following to be preferably 5mol%) propylene, butylene, pentane, n-hexane, 4-methyl pentane-1 and normal octane copolymerization form. Equally, also can comprise a small amount of (below 25wt%) polypropylene, polybutene and ethylene-propylene copolymer in the polyethylene. In addition, polyethylene also may comprise additive commonly used, such as stabilizing agent, pigment, fire retardant and electrical static eliminator etc.
Above-mentioned porous polyethylene film with a large amount of minute apertures can be used the published No.TOKKAI-HEI 2-232242 of Japanese patent gazette (1990), and disclosed technique is made among TOKKAI-HEI5-98065 (1993) and the TOKKAI-HEI 5-239246 (1993). For example, will be by having 5 * 106The ultra-high molecular weight polyethylene of molecular weight dissolves in a kind of solvent, in naphthalane, join solution (concentration: 2 to 30wt%) from a mould with slit, be squeezed into gel mould; After the solvent on the gel mould is by evaporate to dryness, it is stretched with very high rate of extension subsequently.
The proportion of above-mentioned polyethylene porous synthetic resin film is preferably in 5 to 15g/m2Between, thickness is preferably between 25 to 60 microns. Since this film is become by ultrahigh molecular weight polyethylene and machined and in a lateral direction high elongation form, it preferably has high porosity, and machining direction and laterally at least both one of direction on tensile strength can reach more than the 3.5kg/5cm.
And, the present invention can with polyethylene porous synthetic resin film be fibrous nonwoven tissue at thickness direction, but its machined and laterally the shearing strength on both directions one of at least should be 5 to 50 grams. For this reason, preferably improve the interlaminar strength of fibrous nonwoven tissue by calendering, and then guarantee good durability.
Filter element of the present invention comprises porous membrane and lamination one deck infiltration enhancement Layer thereon, to strengthen shearing strength, rigidity and durable ability. If the infiltration enhancement Layer does not reduce high porosity and the strong filter ability of porous filtering film, that is to say that it has the seepage rate identical or higher with the porous synthetic resin film, and (1 to 10cc/min/cm2), can use so the infiltration enhancement Layer of various materials and form.
Yet, preferably use machined and laterally both one of at least the shearing strength on the direction be the enhancement Layer more than the 0.2kg. This infiltration enhancement Layer preferably uses fiber cloth or perforated membrane to make.
Fiber cloth can be weaved, braiding or adhesive-bonded fabric, and the adhesive-bonded fabric that uses woven fabric or comprise continuous fiber is good. Can select as required materials such as polyester, nylon, polyolefin or polyvinyl chloride, the most handy polyester or polyolefin. When using fiber cloth, select proportion to be about 10 to 150 grams/rice2For good.
When using fiber cloth to make enhancement Layer, can be with the fiber cloth quilting, cloth vertically and/or laterally insert at certain intervals the high duty metal band, or banded synthetic resin film is bonded on the cloth.
When using perforated membrane, preferably the diameter in hole is 0.1 to 0.2mm, and porosity is 30 to 90 %, and film thickness is 5 to 500 microns. Particularly preferably use polyester or polyolefin to make perforated membrane.
Filter element of the present invention comprises: the porous filtering film that one deck synthetic resin is made and be pressed in from level to level infiltration enhancement Layer on the film, every layer all has above-mentioned characteristic. Very importantly, film and permeable layer are to couple together by the spot bonding that is dispersed on the interface phase, and wherein the area of spot bonding is every 1cm in the interface phase any part2Interface phase 0.05-0.35cm2。
Self-evident, can a side have also and can interface phase (that is, all being pressed with the infiltration enhancement Layer in the both sides of porous resin film) all be arranged both sides.
Fig. 1 is the perspective illustration of an embodiment of filter element 1, wherein on the porous synthetic resin film 2 lamination one deck woven fabric 3 as the infiltration enhancement Layers.Among the figure, T constitutes the warp of woven fabric 3 and the partial schematic diagram of parallel relation.D, D ' are every 1cm
2Interface layer is gone up the partial schematic diagram of the spot bonding that scatters mutually.
And D is illustrated in the spot bonding on the local sketch S, and wherein the fabric 3 of getting along at interface layer is peelled off from film 2; And D ' illustrates the interface layer virtual image of inner spot bonding mutually.And the area of D and D ' is 1cm
2, and at D place film 2 and permeable layer 3 by the circular point shape spot bonding (d that links to each other
1, d
2, d
3, d
4), the gross area of spot bonding 0.05 to 0.35cm
2Between.
Fig. 2 is another perspective illustration of filter element 1 embodiment, wherein on the porous synthetic resin film 2 lamination one deck perforated membrane 4 as the infiltration enhancement Layers.Among the figure, P is the partial schematic diagram that becomes aperture on the perforated membrane 4.L, L ' are dispersed in 1cm
2The partial schematic diagram of the spot bonding that interface layer is gone up mutually.And L illustrates the spot bonding at partial schematic diagram S place, and wherein the interface layer film 4 of getting along is peelled off from film 2, and L ' then illustrates the interface layer virtual image of inner spot bonding mutually.And the area of L and L ' is 1cm
2, and at L place film 2 and film 4 by linear spot bonding (I
1) link to each other, the area of above-mentioned spot bonding is at 0.05～0.35cm
2Between.
In the filter element of the present invention, the shearing strength of porous synthetic resin film, rigidity and durability must can not be dispersed in the spot bonding of going up mutually with the interface layer that seeps water between the enhancement Layer by the minute aperture of guaranteeing the porous synthetic resin film and stop up and improve.This just requires interface phase any part at 1cm
2Area on the area of spot bonding 0.05 to 0.35cm
2Between.If the area of spot bonding is less than 0.05cm
2, then can not reach above-mentioned linking objective.If the area of spot bonding surpasses 0.35cm
2, seepage rate will descend, thereby filter capacity can reduce--and this can not satisfy actual needs.
As mentioned above, reach minimum for the spot bonding of guaranteeing certain area makes the chocking-up degree to minute aperture on the porous synthetic resin film simultaneously, these spot bondings are preferably circular point shape, linear, polygon or network structure.
Fig. 3 is the schematic diagram of various forms of spot bondings.The very little circular point shape spot bonding of symbol (a) expression area is dispersed in the interface with this circular point shape spot bonding and goes up mutually, so that area is 1cm in the mutually arbitrary part in interface
2Scope in bond area be certain value.Symbol (b) is represented linear spot bonding, is formed by straight line with certain width and length ((b)-1) or curve ((b)-2).Symbol (c) expression polygon spot bonding ((c)-1), they are formed by interconnected straight line or curve with certain width and length, and the space is left in the centre, the compressed format of ((c)-2) expression polygon spot bonding.Symbol (d) is represented netted spot bonding, and this network structure is interwoven by straight line with certain width and length or curve.Similar to spot bonding in (a), (b), (c) or the spot bonding (d) also be dispersed in the interface and go up mutually so that area is 1cm in the mutually arbitrary part in interface
2Scope in the area of spot bonding be certain value.
With regard to above-mentioned various forms of spot bondings, have the spot bonding of a large amount of straight lines or curve spot bonding, under the identical situation of spot bonding area, its infiltration stiffening effect is better.
Therefore, adapt, more preferably use the polygon spot bonding so compare with the circular point shape spot bonding because the polygon spot bonding has guaranteed stiffening effect preferably and its filter capacity and the area of the spot bonding that has reduced.
As mentioned above, circular point shape, linear, polygon or cancellated spot bonding can be with the following method form on mutually at interface layer: after coating binding agent on the photomechanical printing roller that is carved into given shape, the way of logical heating and pressurization makes it be bonded at the interface and goes up mutually, or use and filament shape or pulverous heat fusing binding agent are sprayed onto the way that go up mutually at the interface, also available ultrasonic or other heat seal method without binding agent.
When using filter element of the present invention to handle waste water, preferably the frame body both sides are all spread filter element or with filter element mold pressing pouch.
Fig. 4 is the perspective view of the embodiment of parts, and these parts are used to use filter element of the present invention to carry out filtration treatment.
Fig. 5 be these parts at A-A line place the cutaway view along the direction of arrow.Label 1 expression filter element of the present invention, 11 representational framework bodies, 12 expression dictyosomes, the 13rd, felt, the 14th, liquid outlet.
Fig. 8 is the perspective view of the parts of another kind of shape, and these parts are used to use filter element of the present invention to carry out filtration treatment.
Fig. 9 be these parts at A-A line place the cutaway view along the direction of arrow.Label 1 expression filter element of the present invention, 21 bag parts, the 22nd, the setting frame that holds in the bag 21, the 23rd, the liquid outlet on the bag 21, the 24th, the hermetic unit of element 1, the 25th, the water stream channel that above the setting frame, forms for this element formation.
When filter element of the present invention is used for wastewater treatment, the module internal arrangement and installed many parts that are used to filter in order to divided thin film from, these parts all are covered with filter element 1 of the present invention in the both sides of frame body, as shown in Figure 4; Pending water as waste water, flows into from the outside, and is filtered element 1 filtration; Subsequently, discharge by the sucking-off of a pulsating pump (not shown) and from liquid outlet 14 through the water that filters.
At this moment be preferably in the stiffener 16 that has permeability hole 5 is installed in the frame body 11, as shown in Figure 6.16 pairs of filter elements 1 of stiffener play the effect of supporting and reinforcing.And, owing to have permeability hole 15 on the stiffener 16, can make by mild the flowing in frame body 11 of the water after filter element 1 filtration, and then realize mild filtration.Among Fig. 6, label 17 is represented the space in the stiffener 16, and the 18th, the liquid outlet that links to each other with parts liquid outlet 14.
And owing to stop up etc. when must change parts, if there are a lot of water in the parts, parts will be very heavy, thus with its from be used for divided thin film from module take off and will spend very great strength.For addressing this problem, the frame body 11 interior gaps that filter element shown in Figure 7 19 is housed can be filled up, can not stay in the frame body 11 to guarantee water.For example, the space 17 of stiffener 16 can be filled up with filter element 19, and then the frame body 11 of packing into.Preferably make this filter element 19 with foam article with individual particles foam.For example, preferably use foamed polystyrene.
And then, forming in bag as shown in Figure 8 when filtering the parts of handling usefulness, filter element of the present invention can be used for wastewater treatment or similar direction.Bag 21 can be made by extruding hermetic unit 24 with filter element of the present invention, can use ultrasonic or other heat seal method of producing grain package bag to seal.This heat seal method cost is low and have an enough good sealing.For example, at lamination on the polyethylene porous synthetic resin film on polyester woven fabric and the filter element that connects with spot bonding, with ultrasonic thermosealed method with after the polyethylene fusing, polyester woven fabric is layered on the inboard, makes hermetic unit outside the thin fat of polyethylene is layered on and to obtain enough sealings.
And then, as shown in Figure 8, liquid outlet 23 usefulness that are molded into the valve shape in advance can be contained on the bag 21 with above-mentioned heat seal similar methods.Liquid outlet 23 needn't general assembly on angle as shown; It can be contained on center or other desired location.The number of liquid outlet also is not limited to one, and a plurality of liquid outlets can be installed.
Setting frame 22 is contained in the bag 21, to prevent that bag 21 is crushed at the water after the filtration during from liquid outlet 23 sucking-offs.
Parts need to take out from processed water termly, to check and to change.At this moment, the water in the parts may not can emptying at once because the influence of surplus water weight may make the work difficulty comparatively of taking out parts.In addition, filter element also may be damaged.These problems can be by the mold pressing thing that uses a kind of lightweight with individual particles foam not absorb water, and has the polystyrene mold pressing thing of individual particles foam as use, makees setting frame 22.
And then, when the water sucking-off after liquid outlet 23 will filter, preferably form water stream channel 25 in the surface of setting frame 22, with mild current and the filter effect in the assurance bag 21, and current are closely contacted with setting frame 22.
Usually, when the water after liquid outlet 23 sucking-offs are filtered, the infiltration and the filtration of water only take place near liquid outlet 23.Therefore, preferably suitably select the form and the layout of water stream channel 25, so that the infiltration and the filtration of water all take place on whole bag 21.
When making bag and the parts that form when carrying out wastewater treatment by filter element of the present invention with shown in Figure 8, these parts are put into water, in waste water, absorb water outward from liquid outlet 23 then; Water filters along the direction of arrow shown in Figure 9 by the element 1 of making bag 21, and water is inhaled into bag 21 earlier, discharges from liquid outlet 23 then and purifies waste water.And when in natural calamity or open-air the use, needing to purify waste water,, these parts can be put into the river as drinking water, in pond or other this type of place, outwards absorb water from liquid outlet 23.
Especially, when the perforated membrane that uses pore diameter to make at 0.1 to 0.3 micron High molecular weight polyethylene, bacterium is almost entirely by elimination.So just can obtain the water purification that to drink.
The invention solves the problem of the traditional filtering element existence made from the porous synthetic resin film of high porosity and high-quality filter capacity, improved the operability that is used for film separated components and module with this porous synthetic resin film preparation, make porous filter elements have good durability, can in long-time, guarantee, as in wastewater treatment, the stable filter effect of big quantity of fluid, and can not damage filter element.
And, can produce with the following method with the parts that are used for filtration treatment that filter element of the present invention is made: filter element is layered on the both sides of frame body, or with filter element mold pressing pouch.Especially, the filtration of system pouch with parts have in light weight, operability good, filter capacity is strong and do not have advantage such as leakage.In addition, the bag dismounting is easy, and can make filter element and the filtration module that these parts are housed cheaply.Like this, except being used for wastewater treatment, this product also will have wide application, be included in natural calamity and the open-air sanitation and hygiene that guarantee drinking water.
Below with reference to characteristic the present invention is set forth in more detail.Below seepage rate, porosity, tensile strength and shearing strength in each example measure according to following method:
(1) seepage rate
Seepage rate is by with 0.5kg/cm
2(area is: the amount of purified water of 4.7cm * 4.7cm) is converted into cc/min./cm infiltrate synthetic resin film in following 1 minute of the pressure
2For the amount of unit obtains.
(2) porosity
Porosity calculates according to following formula: wherein the density of material is (ρ o) before the mold pressing, and the density of synthetic resin film is (ρ) after the mold pressing:
Porosity (%)=(1-ρ/ρ o) * 100
(3) tensile strength
The measurement of tensile strength is undertaken by ASTMD-882.
(4) shearing strength
The measurement of shearing strength is undertaken by JISL-1096.
Following material is as porous synthetic resin filter membrane (A) and permeate enhancement Layer (B):
(A) porous synthetic resin filter membrane
--polymer: polyethylene (the registration mark HizexMillion of Mitsui petrochemical industry Co., Ltd)
--molecular weight (mean molecule quantity): 3.3 * 10
6
--seepage rate: 5cc/min./cm
2
--porosity: 85%
--aperture (on average): 1.0 μ m
--tensile strength (machining direction): 3.8kg/5cm
(laterally): 4.0kg/5cm
--shearing strength (machining direction): 12gram
(laterally): 11gram
--proportion: 10g/m
2
--thickness: 50 μ m
(B) infiltration enhancement Layer
--material: mylar's taffeta woven fabric (the registration mark Tetron of Teijin company)
--seepage rate: 50/cc/min./cm
2
--shearing strength (machining direction): 4.0kg
(laterally): 5.0kg
--proportion: 105g/m
2
A kind of urethane groups binding agent (the registration mark Polyflex BD of Daiichikogyoseiyaku company) is coated onto on the circular point shape pattern of mylar's taffeta woven fabric (B) side with above-mentioned character with the photomechanical printing roller that is carved with the circular point shape pattern, at this layer fabric (B) multi-hole filtering film (A) of one deck of having gone up lamination with above-mentioned characteristic.They carry out calendering under 160 ℃ of temperature, and inter-adhesive by spot bonding.At this moment, for area and corresponding physical property and the filter effect of estimating spot bonding, the number of circular point shape pit is changed.Table 1 has provided the estimation result.
Embodiment 5 to 6
With embodiment 3 identical conditions under apply, it is linear (adopting pattern shown in (b)-1 among Fig. 3 among the embodiment 5), hexagon (embodiment 6 adopts (c)-1 pattern among Fig. 3) and netted ((d) pattern among embodiment 7 employing Fig. 3) that lamination, calendering and bonding, difference are to xerox rag on the roller.With estimating, the results are shown in the table 1 with embodiment 3 identical evaluation methods.
Embodiment 8 and 9
With embodiment 3 identical conditions under apply, lamination, calendering and bonding, difference is not to be to use mylar's taffeta woven fabric but adopts following material, and promptly adhesive-bonded fabric of being made up of continuous fiber (embodiment 8) or perforated membrane (embodiment 9) are as the infiltration enhancement Layer.With estimating, the results are shown in the table 1 with embodiment 3 identical evaluation methods.
(B) infiltration enhancement Layer
The adhesive-bonded fabric that o is made up of continuous fiber
--material: polypropylene (the registration mark SPRITOP of Nippon Fushokufu company)
--seepage rate: 80cc/min./cm
2
--shearing strength (machining direction): 0.6kg
(laterally): 1.0kg
--proportion: 50g/m
2
The o perforated membrane
--material: polyethylene (Tamapori company)
--seepage rate: 30cc/min./cm
2
--shearing strength (machining direction): 0.7kg
(laterally): 0.9kg
--aperture (on average) 0.5mm
--porosity: 30%
--thickness: 100 μ m
Table 1
| The spot bonding area | Seepage rate | Shearing strength | Durability | ||
| Machining direction | Laterally | ||||
| ????cm 2 | cc/min/cm 2 | ????kg | ????kg | ||
| Comparing embodiment 1 | ??0.04 * | ????3.0 | ????4.2 | ????5.3 | ????× |
| Embodiment 1 | ??0.06 | ????2.6 | ????4.4 | ????5.5 | ????○ |
| Embodiment 2 | ??0.12 | ????2.0 | ????4.6 | ????5.8 | ????○ |
| Embodiment 3 | ??0.24 | ????1.7 | ????4.8 | ????6.0 | ????○ |
| Embodiment 4 | ??0.34 | ????1.2 | ????5.0 | ????6.2 | ????○ |
| Comparing embodiment 2 | ??0.36 * | ????0.8 | ????5.2 | ????6.4 | ????○ |
| Embodiment 5 | ??0.24 | ????1.8 | ????5.0 | ????6.3 | ????○ |
| Embodiment 6 | ??0.24 | ????1.7 | ????5.2 | ????6.5 | ????○ |
| Embodiment 7 | ??0.24 | ????1.9 | ????5.4 | ????6.7 | ????○ |
| Embodiment 8 | ??0.24 | ????2.5 | ????0.7 | ????1.2 | ????○ |
| Embodiment 9 | ??0.24 | ????2.5 | ????0.8 | ????1.0 | ????○ |
Annotate: zero: do not occur peeling off *: occur peeling off
Be with in the table
*Number item is not within the scope of the present invention.
The durability evaluation method
Filtration shown in Fig. 8 and 9 is all made with filter element in each embodiment with parts (long 75cm, wide 30cm, thick 1.1cm).With this parts with 0.2kg/cm
2Speed inhale running water after 5 minutes, with 0.1kg/cm
2Speed after washed 5 minutes.Aforesaid operations is repeated 10,000 times, filter element peeled off situation evaluation.
Embodiment 10
Below parts that are used for filtration treatment shown in Fig. 8 and 9 make by the filter element of embodiment 3:
--size: 75cm (length) * 30cm (wide)
--thickness: 1.1cm
Place 10 above-mentioned parts a filtration abreast in module.With 1.8m every day
3Flow rate laundrywastes is poured in the module.Simultaneously, sentencing identical speed sucking-off at the liquid outlet of parts purifies waste water.
Use after seven days, take out parts and carry out visual examination.Do not find to damage.To each parts 0.1kg/cm
2Pressure wash after carrying out.Do not find to damage.
Claims (12)
1. filter element, comprise: (1) porous synthetic resin filter membrane, (2) be laminated to infiltration enhancement Layer on the described film (1), it is characterized in that described film (1) and layer (2) link to each other by the spot bonding (3) that is dispersed in interface layer and goes up mutually, and at arbitrary part 1cm of this interface phase
2Area on the area of spot bonding 0.05 to 0.35cm
2Between.
2. the filter element in the claim 1 is characterized in that described spot bonding (3) is the circular point shape tie point.
3. the filter element in the claim 1 is characterized in that described spot bonding (3) is linear tie point.
4. the filter element in the claim 1 is characterized in that described spot bonding (3) is the polygon tie point.
5. the filter element in the claim 1 is characterized in that described spot bonding (3) is bonding for network structure.
6. arbitrary described filter element in the claim 1 to 5, the seepage rate that it is characterized in that described filter membrane (1) are 1 to 10cc/min./cm
2
7. the filter element of claim 6 is characterized in that described film (1) comprises that molecular weight is 5 * 10
5To 7 * 10
6Between High molecular weight polyethylene, this film has a large amount of minute apertures on (1), make porosity reach 60% to 90%, the diameter in hole is between 0.1 to 2.0 micron, the machined of this film (1) and laterally at least both one of the tensile strength and the shearing strength of direction be respectively 3.5kg/5cm or bigger, 5 to 50 grams.
8. arbitrary described filter element in the claim 1 to 5, it is characterized in that described permeable layer (2) machined and laterally at least both one of the shearing strength on the direction be 0.2kg or bigger.
9. the filter element in the claim 8 is characterized in that described permeable layer (2) is one deck fiber cloth.
10. the filter element in the claim 9 is characterized in that described this fiber cloth is a kind of woven fabric.
11. the filter element in the claim 9 is characterized in that the adhesive-bonded fabric of described this fiber cloth for being made up of continuous fiber.
12. the filter element in the claim 8 is characterized in that described permeable layer (2) is one deck porous membrane.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17908196A JPH1015362A (en) | 1996-07-09 | 1996-07-09 | Bag-type film module |
| JP179081/96 | 1996-07-09 | ||
| JP22836596A JPH1066847A (en) | 1996-08-29 | 1996-08-29 | Porous filter membrane and membrane module using the same |
| JP228365/96 | 1996-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1197409A true CN1197409A (en) | 1998-10-28 |
Family
ID=26499047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97190869.9A Pending CN1197409A (en) | 1996-07-09 | 1997-07-07 | Filter element |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0862491A1 (en) |
| CN (1) | CN1197409A (en) |
| ID (1) | ID20443A (en) |
| WO (1) | WO1998001219A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102292602A (en) * | 2009-01-28 | 2011-12-21 | 大金工业株式会社 | Air-conditioning indoor unit and method for producing a filter cleaning device |
| CN104748233A (en) * | 2006-08-31 | 2015-07-01 | 大金工业株式会社 | Air conditioner |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10053752A1 (en) * | 2000-10-30 | 2002-05-08 | Ic Technology Ag | Membrane filter pad |
| US6986428B2 (en) | 2003-05-14 | 2006-01-17 | 3M Innovative Properties Company | Fluid separation membrane module |
| US7279215B2 (en) | 2003-12-03 | 2007-10-09 | 3M Innovative Properties Company | Membrane modules and integrated membrane cassettes |
| EP1625885A1 (en) | 2004-08-11 | 2006-02-15 | Vlaamse Instelling Voor Technologisch Onderzoek (Vito) | Integrated permeate channel membrane |
| DE102004057107B8 (en) * | 2004-11-26 | 2016-07-28 | A3 Water Solutions Gmbh | Frameless, plate-shaped filtration body and filtration module |
| ES2390542B1 (en) * | 2010-03-11 | 2013-11-08 | Lisardo A. GONZALEZ ABELLEIRA | WATER CLEANING FILTER |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4944974A (en) * | 1984-10-24 | 1990-07-31 | Zachariades Anagnostis E | Composite structures of ultra-high-molecular-weight polymers, such as ultra-high-molecular-weight polyethylene products, and method of producing such structures |
| JP2602016B2 (en) * | 1986-09-01 | 1997-04-23 | 日東電工株式会社 | Reinforced porous sheet |
| JPS63273651A (en) * | 1987-04-30 | 1988-11-10 | Toa Nenryo Kogyo Kk | Production of fine porous membrane of polyolefin having ultra-high molecular weight |
| JPH06104736B2 (en) * | 1989-08-03 | 1994-12-21 | 東燃株式会社 | Polyolefin microporous membrane |
| NL9100279A (en) * | 1991-02-18 | 1992-09-16 | Stamicarbon | MICROPOROUS FOIL FROM POLYETHENE AND METHOD FOR MANUFACTURING IT. |
| AU655551B2 (en) * | 1992-12-16 | 1994-12-22 | Kubota Corporation | Filtration membrane cartridge |
-
1997
- 1997-07-07 CN CN97190869.9A patent/CN1197409A/en active Pending
- 1997-07-07 EP EP97929539A patent/EP0862491A1/en not_active Withdrawn
- 1997-07-07 WO PCT/JP1997/002340 patent/WO1998001219A1/en not_active Application Discontinuation
- 1997-07-08 ID IDP972358A patent/ID20443A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748233A (en) * | 2006-08-31 | 2015-07-01 | 大金工业株式会社 | Air conditioner |
| CN104748233B (en) * | 2006-08-31 | 2019-03-08 | 大金工业株式会社 | air conditioner |
| CN102292602A (en) * | 2009-01-28 | 2011-12-21 | 大金工业株式会社 | Air-conditioning indoor unit and method for producing a filter cleaning device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1998001219A1 (en) | 1998-01-15 |
| EP0862491A1 (en) | 1998-09-09 |
| ID20443A (en) | 1998-12-17 |
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