CN102908905A - Device for preparing single-layer composite filter membrane - Google Patents
Device for preparing single-layer composite filter membrane Download PDFInfo
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- CN102908905A CN102908905A CN2012104104335A CN201210410433A CN102908905A CN 102908905 A CN102908905 A CN 102908905A CN 2012104104335 A CN2012104104335 A CN 2012104104335A CN 201210410433 A CN201210410433 A CN 201210410433A CN 102908905 A CN102908905 A CN 102908905A
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- casting solution
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- filter membrane
- holding vessel
- composite filter
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- 239000012528 membrane Substances 0.000 title claims abstract description 81
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 239000002356 single layer Substances 0.000 title abstract 4
- 238000005266 casting Methods 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims description 17
- 239000000945 filler Substances 0.000 claims description 9
- 230000001112 coagulating effect Effects 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 5
- 238000000108 ultra-filtration Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract 10
- 239000004698 Polyethylene Substances 0.000 description 33
- 229920000573 polyethylene Polymers 0.000 description 33
- -1 polyethylene Polymers 0.000 description 32
- 239000010865 sewage Substances 0.000 description 10
- 239000012535 impurity Substances 0.000 description 9
- 239000010410 layer Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000004695 Polyether sulfone Substances 0.000 description 6
- 239000012510 hollow fiber Substances 0.000 description 6
- WFKAJVHLWXSISD-UHFFFAOYSA-N isobutyramide Chemical compound CC(C)C(N)=O WFKAJVHLWXSISD-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229920006393 polyether sulfone Polymers 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 4
- 239000010842 industrial wastewater Substances 0.000 description 4
- 239000008235 industrial water Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 4
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Chinese gallotannin Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000000614 phase inversion technique Methods 0.000 description 1
- 239000012465 retentate Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a device for preparing a single-layer composite filter membrane, belongs to the technical field of ultra-filtration membranes. The invention provides the device for preparing the single-layer composite filter membrane having the advantages of simple structure and convenience for use. The device for preparing the single-layer composite filter membrane comprises a membrane-casting liquid storage tank with an inlet and an outlet. A pipe transmitting rubber wheel with a motor is arranged at the inlet side of the membrane-casting liquid storage tank. A concretion bath water tank is arranged at the outlet side of the membrane-casting liquid storage tank. A membrane-casting liquid filling opening is arranged on the upper part of the membrane-casting liquid storage tank. A membrane-casting liquid scraper is arranged at the outlet of the membrane-casting liquid storage tank and communicated with the membrane-casting liquid storage tank. A heating plate and a piston are arranged in the membrane-casting liquid storage tank. The piston is connected with a piston rod of a cylinder which is arranged under the membrane-casting liquid storage tank.
Description
Technical field
The invention belongs to the ultrafiltration membrane technique field, be specifically related to a kind of device for preparing the single skin composite filter membrane.
Background technology
At present, the milipore filter of domestic use is mainly take hollow fiber ultrafiltration membrane as main, and such milipore filter is used widely in Drinking Water processing, sanitary sewage disposal, and has obtained good result of use and economic benefit.But because supporter and the milipore filter of hollow fiber ultrafiltration membrane are commaterial, intensity is lower, process at high-concentration industrial-water and the phenomenons such as obstruction, fracture of wire often to occur, cause such milipore filter that the shortcomings such as short, fluctuation of service of life-span are arranged when Industrial Wastewater Treatment.Change the milipore filter structure, improve the anti-blockage capability of filter membrane, strengthen the intensity of filter membrane and then the service life of prolongation filter membrane, can play one's part to the full in the industrial wastewater field seems is even more important.
Hollow fiber ultrafiltration membrane has just formed inside pipe wall and the two-layer compacted zone of pipe outer wall when utilizing the phase inversion method film forming, filtrate during by compacted zone diameter be blocked greater than the material of filter opening, enter macropore interlayer between the tube wall less than the material of filter opening, the material part penetration tube inwall compacted zone that enters tube wall flows out, a part remains in the macropore interlayer, when retentate is accumulated to when a certain amount of, the filter membrane transmitance reduces rapidly until filter process stops.
All milipore filter products of selling in the market all can not adopt the gas recoil as the stifled means of anti-soil.
The applicant of this patent has invented a kind of single skin composite filter membrane, and this single skin composite filter membrane comprises the polyethylene sintered pipes, is characterized in being coated with in the hole of polyethylene sintered pipes pipe outer wall having scraped filter membrane.This single skin composite filter membrane intensity is high, long service life, can tolerate the ability of high strength back flush, occupies advantage in high-concentration industrial-water is processed.But the device that does not also prepare in the market this single skin composite filter membrane.
Summary of the invention
For the problem that prior art exists, the invention provides a kind of device of preparation single skin composite filter membrane simple in structure, easy to use.Utilize the single skin composite filter membrane intensity of this device preparation high, long service life, can tolerate the ability of high strength back flush, in high-concentration industrial-water is processed, occupy advantage.
To achieve these goals, the present invention adopts following technical scheme, a kind of device for preparing the single skin composite filter membrane, comprise the casting solution holding vessel with import and outlet, the inlet side of casting solution holding vessel be provided with have a motor send the pipe rubber tire, outlet side at the casting solution holding vessel is provided with coagulating bath water tank, is provided with the casting solution filler on the top of casting solution holding vessel; Be provided with the casting solution scraper in the exit of described casting solution holding vessel, described casting solution scraper is connected with the casting solution holding vessel; Be provided with heating plate and piston in described casting solution holding vessel, described piston is connected with the piston rod of the cylinder that is arranged on casting solution holding vessel below.
Described cylinder is arranged in the cylinder counter.
Compared with prior art, characteristics of the present invention and beneficial effect thereof are:
1, the apparatus structure of preparation single skin composite filter membrane of the present invention is simple, easy to use, and cost is low;
2, as shown in Figure 1, the single skin composite filter membrane that utilizes device of the present invention preparation is with the polyethylene sintered pipes of the ultra-high molecular weight polyethylene powder sintering moulding supporter as filter membrane, casting solution is coated with to be scraped in the hole of polyethylene sintered pipes pipe outer wall, make membrane material and supporter can form anchor formula strong bonded, it is high that the polyethylene sintered pipes self has mechanical strength, good toughness, corrosion-resistant, the characteristics such as high temperature resistant, the composite hyperfiltration membrane of rear formation of being combined with membrane material combines the advantage of the two, compare with hollow fiber ultrafiltration membrane that to have intensity high, the fracture of wire phenomenon that hollow fiber ultrafiltration membrane often has can not appear, can guarantee the normal use of user 8 years, compare the service life with overlength with similar film, in high-concentration industrial-water is processed, occupy advantage;
3, utilizing the single skin composite filter membrane of device preparation of the present invention is a kind of new technology, new material that filters sanitary sewage, industrial wastewater, be coated with that pore size filter is 0.03 micron after membrane material (as shown in Figure 2) film forming of scraping in the hole of polyethylene sintered pipes pipe outer wall, colloid in can filtering water, bacterium, macromolecule organic matter etc., be the new and high technology of processing sanitary sewage, industrial wastewater, can be widely used in the sewage disposal in each field such as food, chemical industry, metallurgy, weaving;
4, utilize the single skin composite filter membrane of device preparation of the present invention owing to there not being the interception resistance of twice compacted zone, so that filter pressure reduces, flow increases, the stifled ability of the anti-soil of filter membrane greatly strengthens, this is the incomparable advantage place of traditional hollow fiber ultrafiltration membrane, as shown in Figure 2, utilize the single skin composite filter membrane of device preparation of the present invention only at the pipe outer wall one deck filter membrane to be arranged, inside pipe wall only has supporter;
5, owing to utilizing the supporter of the single skin composite filter membrane of device preparation of the present invention to be the polyethylene sintered pipes, has higher toughness and intensity; Simultaneously the combination of filter membrane and polyethylene sintered pipes uniqueness makes it to bear larger pressure and not damaged; Filter membrane and supporter strong bonded can be born the combined water and air backwash of 0.2MPa pressure; All milipore filter products of selling in the market all can not adopt combined water and air backwash as the stifled means of anti-soil, utilize the single skin composite filter membrane of device preparation of the present invention to break through this taboo.
Description of drawings
Fig. 1 is the structural representation of single skin composite filter membrane;
Fig. 2 is the microstructure schematic diagram of single skin composite filter membrane;
Fig. 3 is the structural representation of the device of preparation single skin composite filter membrane of the present invention;
Among the figure, 1-polyethylene sintered pipes, 2-send the pipe rubber tire, 3-casting solution filler, 4-casting solution scraper, 5-casting solution holding vessel, 6-heating plate, 7-coagulating bath water tank, 8-piston, 9-cylinder, 10-cylinder counter, 11-import, 12-outlet, 13-filter membrane, 14-pipe outer wall, 15-inside pipe wall.
The specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
As shown in Figure 1 and Figure 2, a kind of single skin composite filter membrane comprises polyethylene sintered pipes 1, is coated with in the hole of described polyethylene sintered pipes 1 pipe outer wall and has scraped filter membrane 13, the pore size filter of described filter membrane 13 is 0.03 micron, and described polyethylene sintered pipes 1 is by the moulding of ultra-high molecular weight polyethylene powder sintering.
The chemical composition of described filter membrane 13 each component is by weight percentage: Kynoar 17%, N-N dimethylacetylamide 79%, polyether sulfone 1.5%, PVP 2.5%.
As shown in Figure 3, the device of described preparation single skin composite filter membrane, comprise the casting solution holding vessel 5 with import 11 and outlet 12, the inlet side of casting solution holding vessel 5 be provided with have a motor send pipe rubber tire 2, outlet side at casting solution holding vessel 5 is provided with coagulating bath water tank 7, is provided with casting solution filler 3 on the top of casting solution holding vessel 5; Be provided with casting solution scraper 4 in the exit of described casting solution holding vessel 5, described casting solution scraper 4 is connected with casting solution holding vessel 5; Be provided with heating plate 6 and piston 8 in described casting solution holding vessel 5, described piston 8 is connected with the piston rod of the cylinder 9 that is arranged on casting solution holding vessel 5 belows, and described cylinder 9 is arranged in the cylinder counter 10.
The preparation method of described single skin composite filter membrane, carry out as follows:
Step 1: polyethylene sintered pipes 1 usefulness running water is cleaned up, and after moisture eliminates in will managing in 60 ℃ baking oven, be installed in and send on the pipe rubber tire 2;
Step 2: the chemical composition percentage by weight by each component is: Kynoar 17%, and N-N dimethylacetylamide 79%, polyether sulfone 1.5%, PVP 2.5% configuration casting solution stirs to dissolving, places its slaking of 2 angels stand-by;
Step 3: the casting solution after the slaking in the step 2 is injected casting solution holding vessels 5 by casting solution filler 3, and by heating plate 6 regulation and control casting solution temperature to 45 ℃;
Step 4: open the motor that send pipe rubber tire 2, polyethylene sintered pipes 1 is sent into pipe rubber tire 2 and moved to casting solution scraper 4 places;
Step 5: open the cylinder 9 in the casting solution holding vessel 5, and open the motor that send pipe rubber tire 2 simultaneously, make polyethylene sintered pipes 1 at the uniform velocity pass through casting solution scraper 4 with the speed of 0.07m/s;
Step 6: the polyethylene sintered pipes 1 after knifing is complete directly falls into coagulating bath water tank 7, stops after 2 minutes in groove, puts into cleaning sink again and soaks 24 hours, and changed water in 1 hour one time;
Step 7: after soaked film pipe put into the glycerite that contains 30wt% and soak 24 hours, take out and be drying to obtain final products, i.e. single skin composite filter membrane.
The present invention in use, sewage enters inside pipe wall 15 by filter membrane 13 and supporter polyethylene sintered pipes 1 under pressure, the impurity in the sewage is intercepted at the surface of filter membrane 13, filtered solution flows out through central tube; Behind the operation 30min, filter membrane 13 surfaces form impurity layer, use filtered solution back flush 15s this moment, after the impurity layer punching on filter membrane 13 surfaces is taken off, can continue to use.
Embodiment 2
As shown in Figure 1 and Figure 2, a kind of single skin composite filter membrane comprises polyethylene sintered pipes 1, is coated with in the hole of described polyethylene sintered pipes 1 pipe outer wall and has scraped filter membrane 13, the pore size filter of described filter membrane 13 is 0.03 micron, and described polyethylene sintered pipes 1 is by the moulding of ultra-high molecular weight polyethylene powder sintering.
The chemical composition of described filter membrane 13 each component is by weight percentage: Kynoar 12%, N-N dimethylacetylamide 82.5%, polyether sulfone 1%, PVP 4.5%.
As shown in Figure 3, the device of described preparation single skin composite filter membrane, comprise the casting solution holding vessel 5 with import 11 and outlet 12, the inlet side of casting solution holding vessel 5 be provided with have a motor send pipe rubber tire 2, outlet side at casting solution holding vessel 5 is provided with coagulating bath water tank 7, is provided with casting solution filler 3 on the top of casting solution holding vessel 5; Be provided with casting solution scraper 4 in the exit of described casting solution holding vessel 5, described casting solution scraper 4 is connected with casting solution holding vessel 5; Be provided with heating plate 6 and piston 8 in described casting solution holding vessel 5, described piston 8 is connected with the piston rod of the cylinder 9 that is arranged on casting solution holding vessel 5 belows, and described cylinder 9 is arranged in the cylinder counter 10.
The preparation method of described single skin composite filter membrane, carry out as follows:
Step 1: polyethylene sintered pipes 1 usefulness running water is cleaned up, and after moisture eliminates in will managing in 60 ℃ baking oven, be installed in and send on the pipe rubber tire 2;
Step 2: the chemical composition percentage by weight by each component is: Kynoar 12%, and N-N dimethylacetylamide 82.5%, polyether sulfone 1%, PVP 4.5% configuration casting solution stirs to dissolving, places its slaking of 5 angels stand-by;
Step 3: the casting solution after the slaking in the step 2 is injected casting solution holding vessels 5 by casting solution filler 3, and by heating plate 6 regulation and control casting solution temperature to 60 ℃;
Step 4: open the motor that send pipe rubber tire 2, polyethylene sintered pipes 1 is sent into pipe rubber tire 2 and moved to casting solution scraper 4 places;
Step 5: open the cylinder 9 in the casting solution holding vessel 5, and open the motor that send pipe rubber tire 2 simultaneously, make polyethylene sintered pipes 1 at the uniform velocity pass through casting solution scraper 4 with the speed of 0.07m/s;
Step 6: the polyethylene sintered pipes 1 after knifing is complete directly falls into coagulating bath water tank 7, stops after 8 minutes in groove, puts into cleaning sink again and soaks 48 hours, and changed water in 2 hours one time;
Step 7: after soaked film pipe put into the glycerite that contains 40wt% and soak 30 hours, take out and be drying to obtain final products, i.e. single skin composite filter membrane.
The present invention in use, sewage enters inside pipe wall 15 by filter membrane 13 and supporter polyethylene sintered pipes 1 under pressure, the impurity in the sewage is intercepted at the surface of filter membrane 13, filtered solution flows out through central tube; Behind the operation 30min, filter membrane 13 surfaces form impurity layer, use filtered solution back flush 15s this moment, after the impurity layer punching on filter membrane 13 surfaces is taken off, can continue to use.
Embodiment 3
As shown in Figure 1 and Figure 2, a kind of single skin composite filter membrane comprises polyethylene sintered pipes 1, is coated with in the hole of described polyethylene sintered pipes 1 pipe outer wall and has scraped filter membrane 13, the pore size filter of described filter membrane 13 is 0.03 micron, and described polyethylene sintered pipes 1 is by the moulding of ultra-high molecular weight polyethylene powder sintering.
The chemical composition of described filter membrane 13 each component is by weight percentage: Kynoar 15%, N-N dimethylacetylamide 81%, polyether sulfone 0.5%, PVP 3.5%.
As shown in Figure 3, the device of described preparation single skin composite filter membrane, comprise the casting solution holding vessel 5 with import 11 and outlet 12, the inlet side of casting solution holding vessel 5 be provided with have a motor send pipe rubber tire 2, outlet side at casting solution holding vessel 5 is provided with coagulating bath water tank 7, is provided with casting solution filler 3 on the top of casting solution holding vessel 5; Be provided with casting solution scraper 4 in the exit of described casting solution holding vessel 5, described casting solution scraper 4 is connected with casting solution holding vessel 5; Be provided with heating plate 6 and piston 8 in described casting solution holding vessel 5, described piston 8 is connected with the piston rod of the cylinder 9 that is arranged on casting solution holding vessel 5 belows, and described cylinder 9 is arranged in the cylinder counter 10.
The preparation method of described single skin composite filter membrane, carry out as follows:
Step 1: polyethylene sintered pipes 1 usefulness running water is cleaned up, and after moisture eliminates in will managing in 60 ℃ baking oven, be installed in and send on the pipe rubber tire 2;
Step 2: the chemical composition percentage by weight by each component is: Kynoar 15%, and N-N dimethylacetylamide 81%, polyether sulfone 0.5%, PVP 3.5% configuration casting solution stirs to dissolving, places its slaking of 10 angels stand-by;
Step 3: the casting solution after the slaking in the step 2 is injected casting solution holding vessels 5 by casting solution filler 3, and by heating plate 6 regulation and control casting solution temperature to 80 ℃;
Step 4: open the motor that send pipe rubber tire 2, polyethylene sintered pipes 1 is sent into pipe rubber tire 2 and moved to casting solution scraper 4 places;
Step 5: open the cylinder 9 in the casting solution holding vessel 5, and open the motor that send pipe rubber tire 2 simultaneously, make polyethylene sintered pipes 1 at the uniform velocity pass through casting solution scraper 4 with the speed of 0.07m/s;
Step 6: the polyethylene sintered pipes 1 after knifing is complete directly falls into coagulating bath water tank 7, stops after 10 minutes in groove, puts into cleaning sink again and soaks 72 hours, and changed water in 3 hours one time;
Step 7: after soaked film pipe put into the glycerite that contains 50wt% and soak 48 hours, take out and be drying to obtain final products, i.e. single skin composite filter membrane.
The present invention in use, sewage enters inside pipe wall 15 by filter membrane 13 and supporter polyethylene sintered pipes 1 under pressure, the impurity in the sewage is intercepted at the surface of filter membrane 13, filtered solution flows out through central tube; Behind the operation 30min, filter membrane 13 surfaces form impurity layer, use filtered solution back flush 15s this moment, after the impurity layer punching on filter membrane 13 surfaces is taken off, can continue to use.
Claims (2)
1. device for preparing the single skin composite filter membrane, it is characterized in that comprising the casting solution holding vessel with import and outlet, the inlet side of casting solution holding vessel be provided with have a motor send the pipe rubber tire, outlet side at the casting solution holding vessel is provided with coagulating bath water tank, is provided with the casting solution filler on the top of casting solution holding vessel; Be provided with the casting solution scraper in the exit of described casting solution holding vessel, described casting solution scraper is connected with the casting solution holding vessel; Be provided with heating plate and piston in described casting solution holding vessel, described piston is connected with the piston rod of the cylinder that is arranged on casting solution holding vessel below.
2. the device of preparation single skin composite filter membrane according to claim 1 is characterized in that described cylinder is arranged in the cylinder counter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104104335A CN102908905A (en) | 2012-10-25 | 2012-10-25 | Device for preparing single-layer composite filter membrane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104104335A CN102908905A (en) | 2012-10-25 | 2012-10-25 | Device for preparing single-layer composite filter membrane |
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| CN102908905A true CN102908905A (en) | 2013-02-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004089838A (en) * | 2002-08-30 | 2004-03-25 | Kyocera Corp | Separation membrane module and manufacturing method thereof |
| CN1683060A (en) * | 2005-03-03 | 2005-10-19 | 上海一鸣过滤技术有限公司 | Tubular variable-diameter stainless steel microporous membrane and preparation method thereof |
| CN101269300A (en) * | 2008-05-09 | 2008-09-24 | 天津膜天膜工程技术有限公司 | Tube winding machine and pipe membrane production equipment composed of the same |
| US20110042316A1 (en) * | 2007-03-06 | 2011-02-24 | E.I. Du Pont De Nemours And Company | Liquid filtration media |
| CN102343218A (en) * | 2011-09-21 | 2012-02-08 | 杭州洁弗膜技术有限公司 | Preparation method of high-pressure-resistant tubular composite support membrane |
| CN202909640U (en) * | 2012-10-25 | 2013-05-01 | 金洪义 | Device for preparing single skin layer composite filter membrane |
-
2012
- 2012-10-25 CN CN2012104104335A patent/CN102908905A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004089838A (en) * | 2002-08-30 | 2004-03-25 | Kyocera Corp | Separation membrane module and manufacturing method thereof |
| CN1683060A (en) * | 2005-03-03 | 2005-10-19 | 上海一鸣过滤技术有限公司 | Tubular variable-diameter stainless steel microporous membrane and preparation method thereof |
| US20110042316A1 (en) * | 2007-03-06 | 2011-02-24 | E.I. Du Pont De Nemours And Company | Liquid filtration media |
| CN101269300A (en) * | 2008-05-09 | 2008-09-24 | 天津膜天膜工程技术有限公司 | Tube winding machine and pipe membrane production equipment composed of the same |
| CN102343218A (en) * | 2011-09-21 | 2012-02-08 | 杭州洁弗膜技术有限公司 | Preparation method of high-pressure-resistant tubular composite support membrane |
| CN202909640U (en) * | 2012-10-25 | 2013-05-01 | 金洪义 | Device for preparing single skin layer composite filter membrane |
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Application publication date: 20130206 |