CN101966429A - Spiral coil type membrane component - Google Patents
Spiral coil type membrane component Download PDFInfo
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- CN101966429A CN101966429A CN2010105319176A CN201010531917A CN101966429A CN 101966429 A CN101966429 A CN 101966429A CN 2010105319176 A CN2010105319176 A CN 2010105319176A CN 201010531917 A CN201010531917 A CN 201010531917A CN 101966429 A CN101966429 A CN 101966429A
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- membrane component
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- length
- spiral wound
- Prior art date
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Links
- 239000012528 membrane Substances 0.000 title claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000004744 fabric Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 10
- 230000004907 flux Effects 0.000 description 10
- 238000010612 desalination reaction Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000003373 anti-fouling effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a spiral coil type membrane component, which comprises at least three membranes capable of being coiled into the membrane component of which the diameter is 2.0 inches, the length is 12 inches, and the water yield is 100 GDP.
Description
Technical field
The application relates to the water purification field.Particularly, the application relates to spiral wound film element.
Background technology
Household water purifier has been widely applied in the family life, the straight drink machine of taking as the leading factor with membrane technology is with its reliable water purification quality, simple using method, less floor space, the first-selection that high cost performance becomes people, wherein the application of milipore filter water dispenser and counter-infiltration water dispenser is more, and particularly the counter-infiltration water dispenser has won most of consumer's trust because of its meticulousr selective filter.Counter-infiltration is a new membrane separation technique that grows up the sixties, is to rely on reverse osmosis membrane to make solvent and solute in the solution carry out separating process under pressure, and the household reverse osmosis membrane component of being sold in the market is most of to be spiral wound film element.
In order to guarantee the operation of membrane component long-term stability, need select suitable diaphragm flux according to required aquifer yield, and the mode that rolls of design membrane component, comprising the materials of diaphragm, filter etc.; The design of maximization membrane area; Water inlet and product water flow passage length etc.
Summary of the invention
The application relates in one aspect to spiral wound film element, and it comprises at least three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component.
The application relates to spiral wound film element on the other hand, and it comprises at least three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component, and described spiral wound film element prepares by the following method:
(1) calculates the length that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component;
(2) folding described diaphragm makes the three pages of diaphragms in the initial position of inner edge of described membrane component divide the central tube excircle equally, and is 120 degree after three pages of diaphragm tail ends of outer most edge closing position overlap respectively after the described membrane component rolling and divides excircle equally.
Description of drawings
Fig. 1 is the schematic diagram of one page diaphragm, two pages of diaphragms and three pages of diaphragms.
Fig. 2 shows the end view drawing of the membrane component that contains three pages of diaphragms.
Fig. 3 is the flux and the desalination variation diagram of antipollution experiment.
The specific embodiment
On the one hand, the application relates to spiral wound film element, and it comprises at least three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component.
In certain embodiments, spiral wound film element comprises at least three pages and can roll into the diaphragm of 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component and the dense water filter that thickness is the 15-21 mil.
In certain embodiments, spiral wound film element comprises three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component.
In certain embodiments, spiral wound film element comprises three pages and can roll into the diaphragm of 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component and the dense water filter that thickness is the 15-21 mil.
The spiral wound film element for preparing the application by the following method, the overall diameter D of collector pipe and inner ring multilayer product water flow passage cloth when the number of turns n of the folding rear film of reeling on membrane component is twined by no diaphragm
0, selected Mo Pianhoudu ﹠amp;
1, folding rear film number of pages m, charging runner cloth thickness;
2, produce water flow passage cloth Hou Du ﹠amp;
3With the required Juan Jing ﹠amp of membrane component; , according to Gong Shi ﹠amp;=D
0+ 2mn (2﹠amp;
1+ ﹠amp;
2+ ﹠amp;
3) determine diaphragm length S
nBy S
n=2{n π (D
0+ k)+and n (n-1) k pi/2 } determine that wherein k is thickness coefficient k=2m (2﹠amp;
1+ ﹠amp;
2+ ﹠amp;
3).
In the embodiment of some preparation spiral wound film element, the overall diameter D of collector pipe and inner ring multilayer product water flow passage cloth when the spacing distance Δ L that every page of folding rear film was placed when membrane component rolled is twined by folding rear film number of pages m and no diaphragm
0, according to formula Δ L=π D
0(1/m) determine, on collector pipe, evenly distribute to guarantee the folding rear film of 1-m page or leaf.
In the embodiment of some preparation spiral wound film element, the length L that first of described folding rear film page has more than second page is by the required Juan Jing ﹠amp of number of turns n, membrane component of the folding rear film of reeling on membrane component; , selected Mo Pianhoudu ﹠amp;
1, folding rear film number of pages m, charging runner cloth thickness;
2, produce water flow passage cloth Hou Du ﹠amp;
3Every page of spacing distance Δ L that folding rear film is placed when rolling with membrane component is according to formula L=π ﹠amp;-2n π [(2m-2) ﹠amp;
1+ m﹠amp;
2+ (m-1) ﹠amp;
3The Δ of]-(m-1) L determines, makes folding rear film roll first page or leaf and first page of terminal coincidence of folding second page of rear film of the folding rear film of n circle back m page or leaf.
In certain embodiments, spiral wound film element comprises at least three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component, and the length of wherein said membrane component is S
n, by formula S
n=2{n π (D
0+ k)+and n (n-1) k pi/2 } determine the overall diameter D of collector pipe and inner ring multilayer product water flow passage cloth when the number of turns n of the folding rear film of wherein reeling is twined by no diaphragm on membrane component
0, selected Mo Pianhoudu ﹠amp;
1, folding rear film number of pages m, charging runner cloth thickness;
2, produce water flow passage cloth Hou Du ﹠amp;
3With the required Juan Jing ﹠amp of membrane component; , according to Gong Shi ﹠amp;=D
0+ 2mn (2﹠amp;
1+ ﹠amp;
2+ ﹠amp;
3) determine; K is a thickness coefficient, according to formula k=2m (2﹠amp;
1+ ﹠amp;
2+ ﹠amp;
3) determine.
In certain embodiments, spiral wound film element comprises at least three pages can roll into the diaphragm of 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component and the dense water filter that thickness is the 15-21 mil, and the length of wherein said membrane component is S
n, by formula S
n=2{n π (D
0+ k)+and n (n-1) k pi/2 } determine the overall diameter D of collector pipe and inner ring multilayer product water flow passage cloth when the number of turns n of the folding rear film of wherein reeling is twined by no diaphragm on membrane component
0, selected Mo Pianhoudu ﹠amp;
1, folding rear film number of pages m, charging runner cloth thickness;
2, produce water flow passage cloth Hou Du ﹠amp;
3With the required Juan Jing ﹠amp of membrane component; , according to Gong Shi ﹠amp;=D
0+ 2mn (2﹠amp;
1+ ﹠amp;
2+ ﹠amp;
3) determine; K is a thickness coefficient, according to formula k=2m (2﹠amp;
1+ ﹠amp;
2+ ﹠amp;
3) determine.
On the other hand, the application relates to spiral wound film element, and it comprises at least three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component, and described spiral wound film element prepares by the following method:
(1) calculates three pages of length that can roll into the diaphragm of 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component; And
(2) folding described diaphragm makes the three pages of diaphragms in the initial position of inner edge of described membrane component divide the central tube excircle equally, and is 120 degree after three pages of diaphragm tail ends of outer most edge closing position overlap respectively after the described membrane component rolling and divides excircle equally.
In certain embodiments, spiral wound film element comprises the diaphragm of 2.0 inches of at least three pages of diameters, 12 inches of length, aquifer yield 100GDP membrane component and the dense water filter of 15-21 mil, and described spiral wound film element prepares by the following method:
(1) calculates the length that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component; And
(2) folding described diaphragm makes the three pages of diaphragms in the initial position of inner edge of described membrane component divide the central tube excircle equally, and is 120 degree after three pages of diaphragm tail ends of outer most edge closing position overlap respectively after the described membrane component rolling and divides excircle equally.
Because of the membrane component aquifer yield of 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP bigger, if adopt 1 page or 2 pages of technologies, guaranteeing under the equal effective film area, employed diaphragm blank size is long, in rolling wrapup procedure, be easy to generate phenomenons such as receiving partially, roll up wrinkle, the production qualification rate is reduced.
In addition, when membrane component moves, producing water collects in the process of flowing to collector pipe along the film bag, pressure descends gradually, can cause nearly collector pipe place flow velocity slow, thereby cause producing the water heterogeneity, make nearly collector pipe place diaphragm easily dirty stifled, opposite as 3 pages of diaphragms employing the application then make runner shorten, and this phenomenon is slowed down, and make the membrane component life-span prolong (as shown in Figure 1) relatively.
Adopt 3 pages of diaphragms of the application to roll, after optimizing diaphragm and filter size, make to roll back every page of diaphragm of membrane component and filter and be evenly distributed on membrane component excircle (every page of diaphragm afterbody angle is 120 °), make membrane component circularity better, apparent size more accurate (as shown in Figure 2).
Hereinafter, the present invention explains by following embodiment with reference to the accompanying drawings in detail so that understand various aspects of the present invention and a bit better.Yet, should be appreciated that following embodiment is nonrestrictive and only is used to illustrate certain embodiments of the present invention.
Embodiment
Method for coiling:
At first the special-purpose collector pipe of 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP is assembled to the automatic film rolling machine top on, reeling earlier, (number of pages of producing water flow passage cloth is identical with the diaphragm number of pages for the guide page of the product water flow passage cloth that coats limit glue, guide page length is according to the external diameter design of collector pipe), runner cloth is fixed on the collector pipe, contain diaphragm that dense water filter folds with first page and put into that ground floor produces water flow passage cloth and the second layer produces between the water flow passage cloth, on diaphragm, be coated with limit glue; Contain diaphragm that dense water filter folds with second page again and put into the second layer and produce between water flow passage cloth and the 3rd page of product water flow passage cloth, be coated with limit glue; Contain diaphragm that dense water filter folds with the 3rd page at last and be put into the 3rd page and produce on the water flow passage cloth, be coated with limit glue; Carry out rolling according to 12 inches of 2.0 inches of diameters, the length of automatic film rolling machine, the program rolling setting of aquifer yield 100GDP, automatically twine the outward appearance adhesive tape after the rolling, promptly be formed with 12 inches of 2.0 inches of diameters, the length of 3 sealing pure water collection bags, the membrane component of aquifer yield 100GDP; Under pressure, produce water and enter into collection of pure water bag and collector pipe outflow.
Roll the membrane component of 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP according to the above specific embodiment with three pages of diaphragms, do flux with the membrane component that 1 page and 2 pages of diaphragms in the prior art roll 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP, the contrast of effective film area is as follows; And the membrane component that rolls into by the present invention of the dense net of high-low limit thickness of dense net that uses involved 15-21 mil thick in this invention, it is as follows that the membrane component that 15 mil thick and the dense net volume of 21 mil thick are made is done the resistance tocrocking contrast:
The contrast of the flux of spiral wound film element and effective film area is as shown in the table in the application's spiral wound film element and the prior art.
Table 1
| Membrane component | Average flux | The effective film area |
| Prior art | 91.3GPD | 5.7ft 2 |
| The application | 100.8GPD | 6.3ft 2 |
| Flux/membrane area increases percentage | 10.4％ | 10.5％ |
Dense water filter antipollution experiment
Consider the difference of the antifouling property of the different membrane components of dense water filter thickness, the consideration of antifouling property when using the long-term utilization and operation of membrane component of thin dense net volume system is especially adopted the dense water filter of above-mentioned two kinds of thickness limit (15 mils and 21 mils) to roll to comprise three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component to carry out running time long inorganic anti and is polluted the contrast experiment.
Experiment condition:
Pollute experiment condition: the test pollutant is 500ppmCaCl
2With 250ppmNaHCO
3Mixed solution because high concentration salt solution osmotic pressure is bigger, is selected the 70psi operating pressure for use when therefore polluting operation, regulating the rate of recovery is 15%; The performance test condition: test fluid is a 250ppmNaCl solution, and operating pressure is 60psi, the rate of recovery 15%.Cleaning fluid adopts 0.2% hydrochloric acid, and temperature all is controlled at about 30 ℃.Pollute operation 20h, 40h, 60h record performance value (desalination and flux) respectively, after clean 2h record performance value (desalination and flux), see membrane component performance recovery situation; Write down performance number (desalination and flux) after again membrane component being polluted 20h at last, the whole antipollution of membrane component, cleaning are recovered to pollute to compare evaluation again.
Experimental result:
By accompanying drawing 3 as can be seen, B group (the dense net of 21 mil thick) membrane component primary data is slightly high than A group (the dense net of 15 mil thick) flux, and desalination is lower slightly, basically identical on the overall performance; Clean and pollute experimental data once more as can be seen by follow-up pollution, the cleaning restorability of two kinds of assemblies is better, satisfies serviceability, and the anti-fouling performance difference of two kinds of assemblies is little, can select as the case may be to use on process choice.
In addition, by cost is adjusted, the cost of preparation the application spiral wound film element 1 page or 2 technologies more of the prior art roll cost and reduce about 8%, and product percent of pass improves about 10%.
Although described specific embodiments of the present invention, but still can carry out various changes and without prejudice to the spirit and scope of the present invention at this according to described should be appreciated that for the purpose of explaining of preamble.Therefore, the present invention only is subjected to the restriction of appended claims.
Claims (8)
1. spiral wound film element, it comprises at least three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component.
2. spiral wound film element as claimed in claim 1, the length of wherein said membrane component are S
n, by formula S
n=2{n π (D
0+ k)+and n (n-1) k pi/2 } determine the overall diameter D of collector pipe and inner ring multilayer product water flow passage cloth when the number of turns n of the folding rear film of wherein reeling is twined by no diaphragm on membrane component
0, selected Mo Pianhoudu ﹠amp;
1, folding rear film number of pages m, charging runner cloth thickness;
2, produce water flow passage cloth Hou Du ﹠amp;
3With the required Juan Jing ﹠amp of membrane component; , according to Gong Shi ﹠amp;=D
0+ 2mn (2﹠amp;
1+ ﹠amp;
2+ ﹠amp;
3) determine; K is a thickness coefficient, according to formula k=2m (2﹠amp;
1+ ﹠amp;
2+ ﹠amp;
3) determine.
3. spiral wound film element as claimed in claim 1 or 2, it also comprises the dense water filter that thickness is the 15-21 mil.
4. as the described spiral wound film element of arbitrary claim among the claim 1-3, it comprises three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component.
5. spiral wound film element, it comprises at least three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component, and described spiral wound film element prepares by the following method:
(1) calculating can roll into the length of the diaphragm of 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component; And
(2) folding described diaphragm makes the three pages of diaphragms in the initial position of inner edge of described membrane component divide the central tube excircle equally, and is 120 degree after three pages of diaphragm tail ends of outer most edge closing position overlap respectively after the described membrane component rolling and divides excircle equally.
6. spiral wound film element as claimed in claim 5, the length of wherein said membrane component are S
n, by formula S
n=2{n π (D
0+ k)+and n (n-1) k pi/2 } determine the overall diameter D of collector pipe and inner ring multilayer product water flow passage cloth when the number of turns n of the folding rear film of wherein reeling is twined by no diaphragm on membrane component
0, selected Mo Pianhoudu ﹠amp;
1, folding rear film number of pages m, charging runner cloth thickness;
2, produce water flow passage cloth Hou Du ﹠amp;
3With the required Juan Jing ﹠amp of membrane component; , according to Gong Shi ﹠amp;=D
0+ 2mn (2﹠amp;
1+ ﹠amp;
2+ ﹠amp;
3) determine; K is a thickness coefficient, according to formula k=2m (2﹠amp;
1+ ﹠amp;
2+ ﹠amp;
3) determine.
7. as claim 5 or 6 described spiral wound film elements, it also comprises the dense water filter that thickness is the 15-21 mil.
8. as the described spiral wound film element of arbitrary claim among the claim 5-7, it comprises three pages of diaphragms that can roll into 2.0 inches of diameters, 12 inches of length, aquifer yield 100GDP membrane component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010531917.6A CN101966429B (en) | 2010-11-04 | 2010-11-04 | Spiral coil type membrane component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010531917.6A CN101966429B (en) | 2010-11-04 | 2010-11-04 | Spiral coil type membrane component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101966429A true CN101966429A (en) | 2011-02-09 |
| CN101966429B CN101966429B (en) | 2015-07-22 |
Family
ID=43545686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010531917.6A Active CN101966429B (en) | 2010-11-04 | 2010-11-04 | Spiral coil type membrane component |
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| Country | Link |
|---|---|
| CN (1) | CN101966429B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580557A (en) * | 2012-03-12 | 2012-07-18 | 王丽华 | Low-pressure-drop spiral coil type membrane element |
| CN103007762A (en) * | 2012-12-21 | 2013-04-03 | 杭州自力太阳能科技有限公司 | Ladder water inflowing rolling membrane element of opening water producing runner |
| CN104971627A (en) * | 2015-06-30 | 2015-10-14 | 佛山市美的清湖净水设备有限公司 | Reverse osmosis membrane module and preparation method thereof |
| CN105642123A (en) * | 2016-01-23 | 2016-06-08 | 山东九章膜技术有限公司 | Membrane rolling method capable of rolling two reverse osmosis membrane elements simultaneously |
| CN110975629A (en) * | 2019-12-13 | 2020-04-10 | 浙江津膜环境科技有限公司 | Design method of universal industrial reverse osmosis membrane element product |
| CN119746635A (en) * | 2024-12-12 | 2025-04-04 | 湖南澳维科技股份有限公司 | Method for increasing effective membrane area of spiral wound membrane element, storage medium and apparatus |
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|---|---|---|---|---|
| US5858229A (en) * | 1996-07-19 | 1999-01-12 | Kurita Water Industries Ltd. | Spiral wound type membrane module |
| JP2000000442A (en) * | 1998-06-16 | 2000-01-07 | Nitto Denko Corp | Spiral type separation membrane module and header for spiral type separation membrane element |
| CN201244449Y (en) * | 2008-07-10 | 2009-05-27 | 艾欧史密斯（上海）水处理产品有限公司 | Spiral coil type film element |
-
2010
- 2010-11-04 CN CN201010531917.6A patent/CN101966429B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5858229A (en) * | 1996-07-19 | 1999-01-12 | Kurita Water Industries Ltd. | Spiral wound type membrane module |
| JP2000000442A (en) * | 1998-06-16 | 2000-01-07 | Nitto Denko Corp | Spiral type separation membrane module and header for spiral type separation membrane element |
| CN201244449Y (en) * | 2008-07-10 | 2009-05-27 | 艾欧史密斯（上海）水处理产品有限公司 | Spiral coil type film element |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580557A (en) * | 2012-03-12 | 2012-07-18 | 王丽华 | Low-pressure-drop spiral coil type membrane element |
| CN103007762A (en) * | 2012-12-21 | 2013-04-03 | 杭州自力太阳能科技有限公司 | Ladder water inflowing rolling membrane element of opening water producing runner |
| CN103007762B (en) * | 2012-12-21 | 2014-12-10 | 杭州自力太阳能科技有限公司 | Ladder water inflowing rolling membrane element of opening water producing runner |
| CN104971627A (en) * | 2015-06-30 | 2015-10-14 | 佛山市美的清湖净水设备有限公司 | Reverse osmosis membrane module and preparation method thereof |
| CN105642123A (en) * | 2016-01-23 | 2016-06-08 | 山东九章膜技术有限公司 | Membrane rolling method capable of rolling two reverse osmosis membrane elements simultaneously |
| CN105642123B (en) * | 2016-01-23 | 2018-03-23 | 山东九章膜技术有限公司 | A kind of wound membrane method that can roll two reverse-osmosis membrane elements simultaneously |
| CN110975629A (en) * | 2019-12-13 | 2020-04-10 | 浙江津膜环境科技有限公司 | Design method of universal industrial reverse osmosis membrane element product |
| CN110975629B (en) * | 2019-12-13 | 2022-03-04 | 浙江津膜环境科技有限公司 | Design method of universal industrial reverse osmosis membrane element product |
| CN119746635A (en) * | 2024-12-12 | 2025-04-04 | 湖南澳维科技股份有限公司 | Method for increasing effective membrane area of spiral wound membrane element, storage medium and apparatus |
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|---|---|
| CN101966429B (en) | 2015-07-22 |
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