CN102335556A - Polyurethane (PE) sintered tube rigid support and soft ultra/micro filtration membrane - Google Patents
Polyurethane (PE) sintered tube rigid support and soft ultra/micro filtration membrane Download PDFInfo
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- CN102335556A CN102335556A CN2011103277205A CN201110327720A CN102335556A CN 102335556 A CN102335556 A CN 102335556A CN 2011103277205 A CN2011103277205 A CN 2011103277205A CN 201110327720 A CN201110327720 A CN 201110327720A CN 102335556 A CN102335556 A CN 102335556A
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Abstract
The invention provides a polyurethane (PE) sintered tube rigid support and soft ultra/micro filtration membrane, which belongs to a filtering element. A soft filtration membrane layer is coated at the periphery of a PE sintered tube in a spiral winding mode, the two ends of the soft filtration membrane in the width direction are coincided with each other, and spiral bumps are formed on the surface by fusing. The PE sintered tube is taken as a rigid secondary support body, a non-woven fabric, a textile soft support ultra/micro filtration membrane or an ultra/micro filtration homogeneous membrane is taken as a filtration membrane layer, bursting strength at least reaches 0.5MPa, and filtering precision is between 0.01 and 1.0 micron. The filtering element meets the requirements of fine filtration such as on-line recycling of treated industrial waste water, secondary waste water treatment, directly-drinking water treatment and the like.
Description
Technical field
The invention belongs to a kind of filter element, particularly relate to a kind of under impregnated in the state that is processed in the liquid to be processed liquid make filtration treatment and obtain soaking in the clear filtrate type film filter employed PE sintered pipes rigid support soft ultra/micro-filtration membrane.
Background technology
In recent years; Impregnated in membrane module and be processed in the liquid, be processed liquid limit Natural Circulation, the immersion-type membrane filtering method that filter on the limit and utilize the buoyancy of air bubble to make; As: the spy opens the used membrane module of clear 61-129094, general special finger hollow fiber membrane module peace membrane module.Here; Hollow fiber membrane module is meant the assembly that the two ends that are the hollow fiber membrane set of several millimeters magnitudes to many external diameters and internal diameter have been fixed; It is to be made by the inner decompression of mesopore cortina to be processed liquid from outer past interior passing through, thus can implement to be processed liquid filtration treatment constituted; On the other hand, flat membrane module is meant and has a plurality of assemblies that are set at the flat film in bag shape, it is to make through the inboard decompression that to be processed liquid inboard from the outer side inflow of so flat film, thus can implement to be processed liquid filtration treatment constituted.In hollow fiber membrane module; It is inboard from the outside entering of hollow fiber membrane to be processed liquid; The aperture of hollow fiber membrane be processed liquid in the contained size that is filtered material and activated sludge substantially identical; Just might be because of causing plug-hole by inaccessible, and air bubble is difficult to pass through in the hollow fiber membrane, the Natural Circulation that is processed liquid has become difficulty.On the other hand, in flat membrane module, be processed liquid from the outside to the inboard, after doing like this, be processed the necessary ascending air that is processed liquid of liquid Natural Circulation and form easily by air bubble.
CN 01807639.4 discloses a kind of immersion type membrane filter; The tubular filter film that uses be formed filtration rete cylindraceous be configured in filter the rete outer peripheral face, have for giving filtering the support rete of rete with the liquid trafficability characteristic of shape retention, its collapse is depressed into and is set at 20kPa less.It is the burst strength that we are referred to as that so-called collapse is pressed.Here, filtering rete is by nonwoven dipping PVC solution, constitutes through the accurate symmetry filter membrane of phase transfer dry process.This tubular filter film also can further have at it and support the enhancement layer with liquid trafficability characteristic that disposes on the outer peripheral face of rete, and at this moment, supporting rete and enhancement layer is that nonwoven is formed preferably to use mylar.The internal diameter of tubular filter film is set at 3-15mm for preferred.Also have, the wall thickness of tubular filter film (A) is set at 0.025～0.1 for preferred with the ratio (A/B) of external diameter (B).Also have, part has formed highly also passable for the projection of 0.02-0.2mm on the outer peripheral face of tubular filter film.At this moment, be that central helical formation projection serves as preferred with the axis that filters rete.The interior maximum shortcoming of tubular film that strengthens the outer phase transfer dry process of supporting is that compressive resistance is low, and flux is low, the easy obstruction.The PE sintering screen pipe that circulates on the market has characteristics such as flux is big, easy anti-cleaning; The product type of merchant advertisement propaganda embraces a wide spectrum of ideas; That filtering accuracy is the highest is 0.4 μ m; In fact do not have a family that the product below the 1 μ m can be provided, can not satisfy the demand of the online recovery of fine filtering that contains high fineness particulate industrial wastewater.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, provide a kind of PE sintered pipes rigid support soft ultra/micro-filtration membrane, its burst strength is 0.5MPa at least; Filtering accuracy can carry out the selectivity manufacturing between 0.01～1 μ m; Flux is big, is prone to anti-the cleaning, is difficult for stopping up; Satisfy the online reuse of Industrial Wastewater Treatment, the demand of fine filterings such as secondary wastewater treatment and direct drinking processing.
The objective of the invention is to realize through following technical scheme:
A kind of PE sintered pipes rigid support is soft to be surpassed/micro-filtration membrane, and it is characterized in that: it comprises rigid support layer and soft filtration rete; Said rigid support layer is the PE sintered pipes; Soft filtration rete is banded; Helical coil is wrapped to overlay on the outer peripheral face of rigid support layer PE sintered pipes, and the two ends of the width of this band overlap, and forms hotmelt lamination projection in ultrasonic fusion place of surperficial spiral.
Described soft filtration rete is made up of homogeneous membrane or heterogeneous body film.
Described homogeneous membrane is soft support base material, is a kind of formation by polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyacrylonitrile (PPA), polysulfones (PS), polyether sulfone (PES), sulfonated polyether sulfone (SPES), PEI (PEIM), polyamide (PA), a vinegar, two vinegar, Triafol T (CA) polymer.
Described heterogeneous body film by nonwoven, the soft support of weaving cotton cloth ultra/the micro-filtration composite membrane constitutes.
Said nonwoven, the soft support of weaving cotton cloth be ultra/and the micro-filtration composite membrane is soft support base material, is to press or weave making with a kind of nonwoven shop of the block copolymer SBS fiber of viscose rayon, polyester fiber, polyethylene fibre, polypropylene fibre or styrene and butadiene.
Described PE sintered pipes rigid support soft ultra/internal diameter of micro-filtration membrane is 3-15mm.
Described PE sintered pipes rigid support is soft to be surpassed/and the wall thickness (A) of micro-filtration membrane is 0.025-0.1 with the ratio (A/B) of external diameter (B).
Described PE sintered pipes rigid support soft ultra/rising height that the outer peripheral face top of micro-filtration membrane forms is 0.02-0.2mm.
Described projection is the central helical setting with the axis of PE sintered pipes.
Described PE sintered pipes rigid support soft ultra/filtering accuracy of micro-filtration membrane is 0.01～1.0 μ m.
The invention has the beneficial effects as follows:
1, burst strength is 0.5MPa at least;
2, filtering accuracy can carry out the selectivity manufacturing between 0.01～1.0 μ m;
3, flux is big, is prone to anti-the cleaning, is difficult for stopping up, and satisfies the online reuse of Industrial Wastewater Treatment, the demand of fine filterings such as secondary wastewater treatment and direct drinking processing.
Description of drawings
Fig. 1 is a stereogram of the present invention;
Fig. 2 is the end view drawing of the VII-VII longitudinal section of Fig. 1;
Fig. 3 is a profile of the present invention;
Fig. 4 is preparation technology figure of the present invention;
Fig. 5 be BJ11/1.0 μ m, BJ12/0.4 μ m, BJ13/0.03 μ m, BJ14/0.01 μ mPE sintered pipes rigid support soft ultra/micro-filtration composite membrane and BJ21/1.0 μ m, BJ22/0.4 μ mPE sintered pipes rigid support be ultra/micro-filtration homogeneous membrane and Japanese soup is shallow/0.4 μ m composite membrane contrast verification tests viscosity and the graph of a relation between the filtering traffic of the model liquid of usefulness;
Fig. 6 be BJ11/1.0 μ m,
and Japanese soup shallow/0.4 μ m composite microporous continuous filtration backwash cycle-index and filter pressure variation diagram;
Fig. 7 be BJ14/0.01 μ m, BJ13/0.03 μ mPE sintered pipes rigid support soft ultra/micro-filtration homogeneous membrane, BJ12/0.4 μ m and BJ11/1.0 μ mPE sintered pipes rigid support soft ultra/micro-filtration composite membrane filtering rate decay pattern in time.
Wherein: the 1-PE sintered pipes, the 2-nonwoven or the soft support of weaving cotton cloth surpass/the micro-filtration rete, 3-projection, 4-homogeneous rete.
The specific embodiment
Experimental example 1: shown in Fig. 1-4; The soft ultrafiltration of a kind of PE sintered pipes rigid support/micro-filtration composite membrane; It is with the average pore size 1.0 μ m of a kind of making of the block copolymer SBS fiber of viscose rayon, polyester fiber, polyethylene fibre, polypropylene fibre or styrene and butadiene and the nonwoven of 0.4 μ m or the soft support of weaving cotton cloth ultra/micro-filtration composite film 2; Be cut into the band shape of wide 2cm, it is pointed out that the definition of said surpassing/micro-filtration composite membrane is here; Filtering accuracy can be at the composite membrane between 0.01～1 μ m; On the outer peripheral face of PE sintered pipes 1 cylindraceous with form helical coil wrapped cover nonwoven or the soft support of weaving cotton cloth ultra/micro-filtration composite film 2, at this moment, the nonwoven or the soft support of weaving cotton cloth be ultra/micro-filtration composite film 2 gives the rigid support layer with PE sintered pipes 1; The two ends of the width of this film band overlap; Formed helical form projection 3 on the surface; Then; Use ultrasonic fusion to superposed part, in addition the reusable heat melt adhesive nonwoven or the soft support of weaving cotton cloth ultra/two ends of micro-filtration composite film 2 overlap the projection 3 of thickness 0.15mm on the ultrasonic fusion place lamination, projection is that central helical is arranged with PE sintered pipes axis; Further having made the about 70cm of length, internal diameter (X) 7mm, wall thickness 3mm, rising height 0.15mm, the external diameter 7.7mm that contains this projection, wall thickness (A) and external diameter (B) surpasses/micro-filtration composite membrane BJ11 and BJ12 than the PE sintered pipes rigid support that is 0.045 is soft; This film be by nonwoven or the soft support of weaving cotton cloth ultra/micro-filtration composite film 2 is for once supporting, PE sintered pipes 1 is the support of rigidity secondary, its filtering accuracy is respectively 1.0 μ m and 0.4 μ m;
The said nonwoven or the soft support of weaving cotton cloth be ultra/and the preparation method of micro-filtration composite membrane is that it may further comprise the steps:
1) casting solution preparation: with mass concentration is the PVC of 8-21%, the pore former of 1-7%, the additive of 1-10% and the solvent of 65-90%, stirs 20-50 hour down at 20-75 ℃, after dissolving full and uniformly; The 20-200 mesh sieve filters, afterwards, deaeration 1-30 hour in a vacuum, fully remove air, obtain casting solution;
2) the nascent supported liquid membrane of striking; And in air prevapourising: after 10-70 ℃ of slaking 24-48 of casting solution constant temperature hour; On the nonwoven or the prop carrier of weaving cotton cloth, spreading to thickness is the nascent supported liquid membrane of 80-600 μ m; And be that 10-40 ℃, relative humidity are to stop 50-150 second in the air of 60-98% in temperature, carry out surface evaporation;
3) gelation: will come into being supported liquid membrane behind air evaporation, and immerse again in 0-60 ℃ the coagulating bath, until complete gel;
4) solid film post processing: the support membrane that solidifies fully, immerse that lixiviate residual solvent and additive are more than three times in 10-60 ℃ the pure water, each 10 minutes, dipping was after 24-72 hour in pure water more at last, and room temperature is dried naturally;
The molecular weight of described PVC is 2 * 10
4-5 * 10
5
The molecular weight of described pore former is 2 * 10
3-2 * 10
6, comprise polyethylene pyrrolidone PVP, or polyethylene glycol PEG, or the lauryl alcohol ether sodium sulfate, or dodecyl sodium sulfate is a kind of, or both or three's mixture;
Described additive is a kind of of water, glycerine, ethylene glycol or diethylene glycol ether;
Described solvent is N, N '-dimethylacetylamide DMAC, N, N '-dimethyl formamide DMF or N-methyl pyrrolidone NMP;
The described striking liquid film of coming into being, and the prevapourising condition is in air:
Casting solution: 20-40 ℃;
Prop carrier: viscose rayon, polyester fiber, polyethylene fibre,
Polypropylene fibre or styrene and butadiene
A kind of making of block copolymer SBS fiber
Nonwoven or weave cotton cloth;
Air themperature: 20-30 ℃;
Relative air humidity: 55-95%;
The time of staying: 50-120 second;
Nascent liquid film optimum thickness: 150-200 μ m;
Nonwoven thickness 0.1-0.1mm～1.5mm, precision ± 0.02mm, nonwoven density 50g/m
2-300g/m
2, precision ± 10g/m
2
The composition of described coagulating bath: comprise first component and second component, the mass content of first component is 0-90%; Residue is second component,
Wherein:
First component is a solvent, and solvent comprises DMAC, DMF or NMP;
Second component comprises water or glycol water, and the percentage composition of ethylene glycol is 0-50%;
The condition of described gelation:
First component is DMAC or DMF, 0%-85%;
Second component is glycol water or water, 15-85%;
Temperature: 0-40 ℃;
Time: 2-10 minute.
Embodiment 2: shown in Fig. 1-4; A kind of PE sintered pipes rigid support is soft to be surpassed/the micro-filtration homogeneous membrane; It is the ultra/micro-filtration homogeneous rete 4 with the average pore size 1.0 μ m of a kind of making of polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyacrylonitrile (PPA), polysulfones (PS), polyether sulfone (PES), sulfonated polyether sulfone (SPES), PEI (PEIM), polyamide (PA), a vinegar, two vinegar, Triafol T (CA) polymer and 0.4 μ m; The preparation method of this homogeneous membrane is through CN201010562862.5 patent application protection; Be cut into the band shape of wide 2cm, it is pointed out that the definition of said surpassing/micro-filtration homogeneous membrane is here; Filtering accuracy can be at the homogeneous membrane between 0.01～1.0 μ m; Helical coil is wrapped covers ultra/micro-filtration homogeneous rete 4 film bands to form on the outer peripheral face of PE sintered pipes 1 cylindraceous, and at this moment, ultra/micro-filtration homogeneous rete 4 is given the rigid support layer with PE sintered pipes 1; The two ends of the width of this film band overlap; Formed helical form projection 3 on the surface; Then; Use ultrasonic fusion to superposed part, the reusable heat melt adhesive overlaps the projection 3 of thickness 0.15mm on the ultrasonic fusion place lamination at the ultra/two ends of micro-filtration homogeneous rete 4 in addition, and projection is that central helical is arranged with PE sintered pipes axis; Further made the about 70cm of length, internal diameter (X) 7mm, wall thickness 3mm, rising height 0.15mm, the external diameter 7.7mm that contains this projection, wall thickness (A) and external diameter (B) and surpassed/micro-filtration homogeneous membrane BJ21 and BJ22 than the PE sintered pipes rigid support that is 0.045, its filtering accuracy is 1.0 μ m and 0.4 μ m.
Embodiment 3: shown in Fig. 1-4; A kind of PE sintered pipes rigid support is soft to be surpassed/the micro-filtration composite membrane; It is with the average pore size 0.03 μ m of a kind of making of the block copolymer SBS fiber of viscose rayon, polyester fiber, polyethylene fibre, polypropylene fibre or styrene and butadiene and the nonwoven of 0.01 μ m or the soft support of weaving cotton cloth ultra/micro-filtration composite film 2; Made the about 70cm of length, internal diameter (X) 7mm, wall thickness 3mm, rising height 0.15mm, the external diameter 7.7mm that contains this projection, wall thickness (A) and external diameter (B) according to the method for embodiment 1 and surpassed/micro-filtration composite membrane BJ13 and BJ14 than the PE sintered pipes rigid support that is 0.045 is soft, its filtering accuracy is 0.03 μ m and 0.01 μ m.
PE sintered pipes rigid support soft ultra/preparation method of micro-filtration composite membrane BJ13 and BJ14 is with embodiment 1.
Shown in Fig. 5 a, 5b; Use ultra/micro-filtration composite membrane BJ11, BJ12, BJ13, the BJ14 of embodiment 1 and 3 preparations, and ultra/micro-filtration homogeneous membrane BJ21 and the BJ22 that uses embodiment 2 preparations, setting the backwash air flow is that 1.5L/min, head difference are 60cm (6kPa); Carry out constant pressure filtration; Respectively to the mixed liquor of experimental liquid CMC/PEO=0.1 weight %/0.8 weight %, viscosity=8cps measures the relation of the viscosity of filtering traffic and model liquid; Filtering traffic is measured with graduated cylinder and stopwatch, and test data of experiment is as shown in table 1.
Table 1: the PE sintered pipes rigid support of different average pore diameters soft ultra/viscosity of the model liquid that micro-filtration composite membrane and homogeneous membrane demonstration test are used and the comparative experiments test data of the relation between the filtering traffic and BJ22/0.4 μ m film and Japanese 0.4 μ m film:
Analytical table 1 draws: BJ21/1.0 μ m limit compressive resistance is the shallow Co., Ltd. of Japanese soup at the application number of China's application is 30 times of CN01807639.4 patent of invention product/0.4 μ m film, and BJ22/0.4 μ m is 25～30 times of the shallow 0.4 μ m film of soup; The filtrating viscosity is when being 1mPas, and the filtering rate of BJ22/0.4 μ m exceeds 25.71% than the film of the shallow aperture of the same race of Japanese soup specification, and the filtrating viscosity is when being 100mPas, and the filtering rate of BJ22/0.4 μ m is 5.67 times of film of the shallow aperture of the same race of Japanese soup specification.The filtering rate of the BJ11 of embodiment, BJ12, BJ21 and BJ22 is 53.46% of the shallow composite membrane of Japanese soup/0.4 μ mm with the attenuation rate that filtrating viscosity increases.The attenuation rate that BJ13/0.03 and BJ14/0.01 filtering rate increase with filtrating viscosity is than the shallow composite membrane of Japanese soup/0.4 μ mm low 1%.Data analysis shows; PE sintered pipes rigid support soft ultra/micro-filtration composite membrane BJ11, BJ12, BJ13, BJ14 and use the PE sintered pipes rigid support of embodiment 2 preparations ultra/micro-filtration homogeneous membrane BJ21 compares with the shallow composite membrane of Japanese soup/0.4 μ mm with BJ22, have the compressive resistance height, filtering rate is fast and more is applicable to the filtration of high glutinous system.
Table 2: regularly backwash continuous filtration filter pressure is with the variation and the backwash effect of cycle-index
Fig. 6 and table 2 are checking backwash condition and the figure as a result of the quantitative backwash cycles filtration test implemented; Use
with Japan/0.4 μ m composite membrane filtration system to experimental liquid average grain diameter 0.5 μ m, and when using BJ11/1.0 μ m composite membrane filtration system that the cataloid suspension of experimental liquid average grain diameter 1.2 μ m, concentration " c " PPm as shown in Figure 6 is implemented quantitative filtration, study the relation of its filtration-back washing circulation and filter pressure.For making the cataloid suspension that uses as experimental liquid not precipitate stirring test liquid; Be set at filtering traffic " F " L/min; Carry out the quantitative filtration of 9min; Under the condition of setting back washing liquid measure 25mL, back washing pressure (air pressure) 30kPa, carry out back washing 30s then, Fig. 6 shows and carries out such filtration-back washing circulation repeatedly, and the result sees table 2 and Fig. 6.Among Fig. 6, the filtercondition C=100 of 1-5 filtration cycle, F=12; The filtercondition C=100 of 7-11 filtration cycle, F=18; The filtercondition C=100 of 11-12 filtration cycle, F=12; The filtercondition C=200 of 12-17 filtration cycle, F=18; What the 17th～21 filtration cycle adopted is that aeration 2min does not implement backwash after filtering 8min, filters 20min, even implement backwash, has also recovered less than original filtering traffic; The filtercondition C=300 of 21-27 filtration cycle, F=18; The filtercondition C=500 of 27-33 filtration cycle, F=18; BJ11/1.0 μ m, BJ12/0.4 μ m, BJ13/0.03 μ m, BJ14/0.01 μ m be ultra/micro-filtration composite membrane and BJ21/1.0, BJ22/0.4 μ m be ultra/the filtering traffic decay of micro-filtration homogeneous membrane and with Japanese soup shallow/0.4 μ m composite membrane more as shown in Figure 6.
Table 3 and Fig. 7 a-c be the PE sintered pipes rigid support of above-mentioned 6 kinds of different average pore diameters specifications soft ultra/micro-filtration composite membrane and the homogeneous membrane constant pressure filtration filtering rate when backwash is filtered continuously decays with filtration time, and the test data of experiment of BJ22/0.4 μ m film and the comparison of Japanese 0.4 μ m film and illustrate the result.Wherein, continuously the flow curve of backwash is: the backwash liquid measure is set at 25mL, and backwash presses (air pressures) when being set at 20kPa, after the 30s backwash, and the filtering traffic of measuring immediately with the filtration time change.
Table 3:
Analytical table 3 draws: BJ12/0.4 μ m is that CN01807639.4 patent of invention product/0.4 μ m film compare with the shallow Co., Ltd. of Japanese soup at the application number of China's application with BJ22/0.4 μ m, and the film of the inceptive filtering speed ratio Japan shallow aperture of the same race of soup specification exceeds 33.33%; Filtering rate after 160 minutes exceeds 43.33% than the shallow composite membrane of Japanese soup/0.4 μ mm; Filtering rate after 160 minutes is 0.0175ml/min with the rate of decay of filtration time, has reduced by 6.91% than the 0.0188ml/min of the shallow composite membrane of Japanese soup/0.4 μ mm.Data analysis shows; PE sintered pipes rigid support soft ultra/micro-filtration composite membrane BJ11, BJ12, BJ13, BJ14 and PE sintered pipes rigid support be ultra/micro-filtration homogeneous membrane BJ21 compares with the shallow composite membrane of Japanese soup/0.4 μ mm with BJ22; Have that filtering rate is fast, the filtering rate attenuation rate is low, should not stop up, backwash and regeneration is effective and more can satisfy the online reuse of Industrial Wastewater Treatment, the demand of fine filterings such as secondary wastewater treatment and direct drinking processing.
Claims (10)
1. soft surpassing/micro-filtration membrane of PE sintered pipes rigid support, it is characterized in that: it comprises rigid support layer and soft filtration rete; Said rigid support layer is the PE sintered pipes; Soft filtration rete is banded; Helical coil is wrapped to overlay on the outer peripheral face of rigid support layer PE sintered pipes, and the two ends of the width of this band overlap, and forms hotmelt lamination projection in ultrasonic fusion place of surperficial spiral.
2. PE sintered pipes rigid support as claimed in claim 1 is soft to be surpassed/micro-filtration membrane, and it is characterized in that: described soft filtration rete is to be made up of heterogeneous body film or homogeneous membrane.
3. PE sintered pipes rigid support as claimed in claim 2 soft ultra/micro-filtration membrane, it is characterized in that: described heterogeneous body film by nonwoven, the soft support of weaving cotton cloth ultra/the micro-filtration composite membrane constitutes.
4. PE sintered pipes rigid support as claimed in claim 3 is soft to be surpassed/micro-filtration membrane; It is characterized in that: described nonwoven, the soft support of weaving cotton cloth be ultra/the micro-filtration composite membrane is soft support base material, is to press or weave making with a kind of nonwoven shop of the block copolymer SBS fiber of viscose rayon, polyester fiber, polyethylene fibre, polypropylene fibre or styrene and butadiene.
5. PE sintered pipes rigid support as claimed in claim 2 is soft to be surpassed/micro-filtration membrane; It is characterized in that: said homogeneous membrane is soft support base material, is a kind of formation by polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyacrylonitrile (PPA), polysulfones (PS), polyether sulfone (PES), sulfonated polyether sulfone (SPES), PEI (PEIM), polyamide (PA), a vinegar, two vinegar, Triafol T (CA) polymer.
6. PE sintered pipes rigid support as claimed in claim 1 soft ultra/micro-filtration membrane, it is characterized in that: described PE sintered pipes rigid support soft ultra/internal diameter of micro-filtration membrane is 3-15mm.
7. PE sintered pipes rigid support as claimed in claim 1 is soft to be surpassed/micro-filtration membrane, it is characterized in that: and described PE sintered pipes rigid support is soft to be surpassed/and the wall thickness (A) of micro-filtration membrane is 0.025-0.1 with the ratio (A/B) of external diameter (B).
8. PE sintered pipes rigid support as claimed in claim 1 soft ultra/micro-filtration membrane, it is characterized in that: described PE sintered pipes rigid support soft ultra/rising height that the outer peripheral face top of micro-filtration membrane forms is 0.02-0.2mm.
9. PE sintered pipes rigid support as claimed in claim 1 is soft to be surpassed/micro-filtration membrane, and it is characterized in that: described projection is the central helical setting with the axis of PE sintered pipes.
10. PE sintered pipes rigid support as claimed in claim 1 soft ultra/micro-filtration membrane, it is characterized in that: described PE sintered pipes rigid support soft ultra/filtering accuracy of micro-filtration membrane is 0.01～1.0 μ m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103277205A CN102335556A (en) | 2011-10-26 | 2011-10-26 | Polyurethane (PE) sintered tube rigid support and soft ultra/micro filtration membrane |
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|---|---|---|---|
| CN2011103277205A CN102335556A (en) | 2011-10-26 | 2011-10-26 | Polyurethane (PE) sintered tube rigid support and soft ultra/micro filtration membrane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007788A (en) * | 2012-12-17 | 2013-04-03 | 浙江理工大学 | Preparation method of wrapped polytetrafluoroethylene ultra-micro filter tube membrane |
| CN108367246A (en) * | 2015-11-19 | 2018-08-03 | 恩特格里斯公司 | Feature on perforated membrane |
-
2011
- 2011-10-26 CN CN2011103277205A patent/CN102335556A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007788A (en) * | 2012-12-17 | 2013-04-03 | 浙江理工大学 | Preparation method of wrapped polytetrafluoroethylene ultra-micro filter tube membrane |
| CN103007788B (en) * | 2012-12-17 | 2014-11-12 | 浙江理工大学 | Preparation method of wrapped polytetrafluoroethylene ultra-micro filter tube membrane |
| CN108367246A (en) * | 2015-11-19 | 2018-08-03 | 恩特格里斯公司 | Feature on perforated membrane |
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Application publication date: 20120201 |