CN102166477A - Rolled reverse osmosis membrane element with gradually-reduced inlet channel - Google Patents
Rolled reverse osmosis membrane element with gradually-reduced inlet channel Download PDFInfo
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- CN102166477A CN102166477A CN2011101503112A CN201110150311A CN102166477A CN 102166477 A CN102166477 A CN 102166477A CN 2011101503112 A CN2011101503112 A CN 2011101503112A CN 201110150311 A CN201110150311 A CN 201110150311A CN 102166477 A CN102166477 A CN 102166477A
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Abstract
The invention discloses a rolled reverse osmosis membrane element with a gradually-reduced inlet channel, which is formed by winding a pure water guide net, a reverse osmosis membrane and an water inlet guide net around a central water production pipe in a superposition mode, and the inlet water guide net and the pure water guide net are respectively arranged in a water inlet channel formed by an internal surface of the folded reverse osmosis membrane and a water production channel formed by the adjacent external surfaces of the folded reverse osmosis membrane. The rolled reverse osmosis membrane element disclosed by the invention is characterized in that three folding edges are formed at the side of the central water production pipe after the reverse osmosis membrane is folded, the middle folding edge is embedded into the water inlet channel, so that the water inlet channel is divided into front water inlet sub-channels at the upper and lower layers of the central pipe side and a rear water inlet sub-channel at a concentrated water outlet side, and the water inlet guide net is divided into a large water inlet guide net and a small water inlet guide net, the large water inlet guide net is arranged in one of the front water inlet sub-channels and the rear water inlet sub-channel, and the small water inlet guide net is only arranged at the other front water inlet sub-channel. The rolled reverse osmosis membrane element disclosed by the invention has the advantages of simple manufacturing mode, simpleness in implementation, and capability of realizing mass production.
Description
Technical field
The invention belongs to the clean water treatment technical field, relate to the reverse-osmosis membrane element of removing impurity such as silt, mud, colloid, microorganism, virus, organic matter and inorganic salts in the water, relate in particular to the gradually little coiled reverse osmosis membrane element of a kind of water inlet flow channel.
Background technology
Coiled reverse osmosis membrane element is by several pieces sizes, the on all four standard size counter-infiltration of size and dimension diaphragm, pure water water conservancy diversion net, and water inlet water conservancy diversion net is wrapped in the center water producing pipe and constitutes.Existing coiled reverse osmosis membrane element is to adopt thickness and the on all four water inlet water conservancy diversion of count net.Because the part of water inlet is penetrated into the back side of counter-infiltration diaphragm and forms pure water, the flow of water inlet can be more and more littler, the flow of generally final dense water of discharging from dense water end (W.E.) is 50% to 80% of a former water flow of inlet water, because former water water inlet flow on longshore current road direction reduces gradually, thereby also cause flow velocity to reduce, because the reduction of flow velocity makes the water velocity of reverse-osmosis membrane element water inlet end and dense water end (W.E.) difference occur, directly causes the concentration polarization phenomenon.The aggravation of the dense water end (W.E.) concentration polarization of reverse-osmosis membrane element phenomenon can be quickened the pollution on this end regions counter-infiltration diaphragm surface, makes salt rejection rate and aquifer yield reduce, and reverse osmosis membrane component life shortens.
For this reason, the applicant has invented a kind of coiled reverse osmosis membrane element of runner net varied in thickness, open notification number is in the Chinese invention patent application of CN101711948A, and its improved procedure is that the thickness with water inlet water conservancy diversion net reduces gradually along the direction that flows to of former water in water inlet flow channel.Through improving, when flow of inlet water and water inlet flow channel consistent length, water inlet flow channel net thickness reduces, the water inlet flow velocity can increase, thereby film surface water velocity increases, and has so just reduced the concentration polarization phenomenon of the dense water end (W.E.) membrane surface of membrane component, has stablized salt rejection rate and aquifer yield, reduce membrane component and polluted speed, prolonged the service life of reverse osmosis membrane.
But in the actual fabrication process, water inlet water conservancy diversion net is difficult to accomplish progressive thickness, and water inlet water conservancy diversion net adopts the fritter water inlet water conservancy diversion net by the polylith thickness-tapered to connect, and lacks operability in batch process again.
Summary of the invention
Technical problem to be solved by this invention provides the gradually little coiled reverse osmosis membrane element of water inlet flow channel that a kind of production method is simple, can be fit to batch process, to overcome the deficiency that prior art exists.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
The coiled reverse osmosis membrane element that a kind of water inlet flow channel is gradually little, by pure water water conservancy diversion net, the counter-infiltration diaphragm, the stack of water inlet water conservancy diversion net is wrapped on the water producing pipe of center and forms, described water inlet water conservancy diversion net and pure water water conservancy diversion net lay respectively at water inlet flow channel that described counter-infiltration diaphragm forms by inner surface through folding back and are formed in the product water flow passage by adjacent external surfaces, it is characterized in that: the folding back of described counter-infiltration diaphragm is being positioned at three flangings of central tube side formation, flanging makes water inlet flow channel be divided in going deep in the water inlet flow channel to be positioned at water inlet flow channel before the levels of central tube side and be positioned at the back water inlet flow channel of dense water out side in the middle of described, described water inlet water conservancy diversion net is divided into big water inlet water conservancy diversion net and little water inlet water conservancy diversion net, described big water inlet water conservancy diversion net is placed in one of them preceding water inlet flow channel and the back water inlet flow channel, and described little water inlet water conservancy diversion net only is placed in another preceding water inlet flow channel.
Adopt above-mentioned diaphragm folding method to make and have two-layer water inlet flow channel being positioned at center water producing pipe side, be positioned at dense water out side and have one deck water inlet flow channel, it is wide also just to have realized being positioned at center water producing pipe side water inlet flow channel, to be positioned at dense water out side water inlet flow channel narrow, realized promptly that also water inlet flow channel flows to the purpose that direction diminishes gradually along former water in water inlet flow channel.Like this when flow of inlet water and water inlet flow channel consistent length, water inlet flow channel is gradually little, the water inlet flow velocity can increase, thereby film surface water velocity increases, so just reduced the concentration polarization phenomenon on the dense water out terminal membrane of membrane component sheet surface, stablize salt rejection rate and aquifer yield, reduced membrane component and polluted speed, prolonged the service life of reverse osmosis membrane.Because the present invention only needs conversion to roll over method once and small one and large one water inlet water conservancy diversion net of configuration get final product, therefore, the present invention have production method simple, implement easily, can realize the advantage of producing in batches.
In preferred implementation of the present invention, described preceding water inlet flow channel accounts for the 1/4-1/3 of whole water inlet flow channel length.Such ratio can guarantee the flow velocity basically identical of water in water inlet flow channel and product water flow passage.
Description of drawings
The present invention is described in detail below in conjunction with accompanying drawing and the specific embodiment of the invention:
Fig. 1 is the deployed configuration schematic diagram of membrane component of the present invention before twining;
The specific embodiment
As shown in Figure 1, the coiled reverse osmosis membrane element 10 of runner net varied in thickness of the present invention, two groups of water purification diaphragm groups 11 that are made of pure water water conservancy diversion net 100, counter-infiltration diaphragm 200, the stack of water inlet water conservancy diversion net are wrapped on the center water producing pipe 400 and form.
Wherein, counter-infiltration diaphragm 200 is through being folded into laterally " M " shape, promptly have three this sides being positioned at center water producing pipe 400 sides, in the wherein middle flanging indentation diaphragm, the water inlet flow channel 210 that makes inner surface form is divided into the levels two preceding water inlet flow channels 211,212 that are positioned at center water producing pipe 400 sides, be positioned at the back water inlet flow channel 213 of dense water out 12 sides, form between the adjacent external surfaces and produce water flow passage 220 (the last outer surface of the counter-infiltration diaphragm of the following outer surface of the counter-infiltration diaphragm of the water purification diaphragm group of bottom and the water purification diaphragm group of top layer also forms and produces water flow passage) after winding.
Water inlet water conservancy diversion net is divided into big water inlet water conservancy diversion net 301 and little water inlet water conservancy diversion net 302, and wherein big water inlet water conservancy diversion net is arranged in the preceding water inlet flow channel 211 and the back water inlet flow channel 213 on upper strata, and little water inlet water conservancy diversion net 302 only is arranged in the preceding water inlet flow channel 212 of lower floor.Pure water water conservancy diversion net 100 is arranged in and produces water flow passage 220.
This reverse-osmosis membrane element 10 is when making pure water, former water before flowing in the water inlet flow channel 211,212 flows to dense water out 12 ends along big water inlet water conservancy diversion net 301 and little water inlet water conservancy diversion net 302 (as shown by arrows), in flow process, the former water of a part filters through counter-infiltration diaphragm 200 becomes pure water, pure water flows to center water producing pipe 400 along pure water water conservancy diversion net 100, enter in the center water producing pipe 400, discharge from dense water out 12 ends and the unfiltered former water of another part just becomes dense water.
In an embodiment of the present invention, preceding water inlet flow channel accounts for the 1/4-1/3 of whole water inlet flow channel length.Such ratio can guarantee the flow velocity basically identical of water in water inlet flow channel and product water flow passage.
By above-mentioned improvement, make and have two-layer water inlet flow channel being positioned at center water producing pipe side, be positioned at dense water out side and have one deck water inlet flow channel, it is wide also just to have realized being positioned at center water producing pipe side water inlet flow channel, to be positioned at dense water out side water inlet flow channel narrow, realized promptly that also water inlet flow channel flows to the purpose that direction diminishes gradually along former water in water inlet flow channel.Like this when flow of inlet water and water inlet flow channel consistent length, water inlet flow channel is gradually little, the water inlet flow velocity can increase, thereby film surface water velocity increases, so just reduced the concentration polarization phenomenon on the dense water out terminal membrane of membrane component sheet surface, stablize salt rejection rate and aquifer yield, reduced membrane component and polluted speed, prolonged the service life of reverse osmosis membrane.
Because the present invention only needs conversion to roll over method once and small one and large one water inlet water conservancy diversion net of configuration get final product, therefore, the present invention have production method simple, implement easily, can realize the advantage of producing in batches.
But the above-mentioned specific embodiment is exemplary, is to understand and implement the present invention in order better to enable those skilled in the art to, and can not be interpreted as it is limiting the scope of the invention.So long as any being equal to of doing based on disclosed spirit changes or modification, all fall into protection scope of the present invention.
Claims (2)
1. coiled reverse osmosis membrane element that water inlet flow channel is gradually little, by pure water water conservancy diversion net, the counter-infiltration diaphragm, the stack of water inlet water conservancy diversion net is wrapped on the water producing pipe of center and forms, described water inlet water conservancy diversion net and pure water water conservancy diversion net lay respectively at water inlet flow channel that described counter-infiltration diaphragm forms by inner surface through folding back and are formed in the product water flow passage by adjacent external surfaces, it is characterized in that: the folding back of described counter-infiltration diaphragm is being positioned at three flangings of central tube side formation, water inlet flow channel and be positioned at the back water inlet flow channel of dense water out side before the levels that flanging gos deep into making water inlet flow channel be divided in the water inlet flow channel and is positioned at the central tube side in the middle of described, described water inlet water conservancy diversion net is divided into big water inlet water conservancy diversion net and little water inlet water conservancy diversion net, described big water inlet water conservancy diversion net is placed in one of them preceding water inlet flow channel and the back water inlet flow channel, and described little water inlet water conservancy diversion net only is placed in another preceding water inlet flow channel.
2. the gradually little coiled reverse osmosis membrane element of water inlet flow channel according to claim 1 is characterized in that: water inlet flow channel accounts for the 1/4-1/3 of whole water inlet flow channel length before described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101503112A CN102166477B (en) | 2011-06-03 | 2011-06-03 | Rolled reverse osmosis membrane element with gradually-reduced inlet channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101503112A CN102166477B (en) | 2011-06-03 | 2011-06-03 | Rolled reverse osmosis membrane element with gradually-reduced inlet channel |
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| CN102166477A true CN102166477A (en) | 2011-08-31 |
| CN102166477B CN102166477B (en) | 2013-03-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108341462A (en) * | 2017-08-25 | 2018-07-31 | 九阳股份有限公司 | A kind of reverse osmosis filter core and reverse osmosis element kit |
| US10258928B2 (en) | 2014-03-31 | 2019-04-16 | Dow Global Technologies Llc | Spiral wound membrane module adapted for high recovery |
| CN113101807A (en) * | 2021-04-06 | 2021-07-13 | 九章膜(北京)科技有限公司 | Membrane module, membrane equipment with membrane module and membrane system |
| CN114307657A (en) * | 2021-10-29 | 2022-04-12 | 浙江沁园水处理科技有限公司 | Roll up membrane structure and filter element subassembly with antipollution ability |
| US11938430B2 (en) | 2019-03-22 | 2024-03-26 | Kemflo (Nanjing) Environmental Technology Co., Ltd. | Flow guide mesh, membrane element, and filter assembly |
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| US20040124134A1 (en) * | 2002-12-25 | 2004-07-01 | Nitto Denko Corporation | Process for producing spiral membrane element |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10258928B2 (en) | 2014-03-31 | 2019-04-16 | Dow Global Technologies Llc | Spiral wound membrane module adapted for high recovery |
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| US11938430B2 (en) | 2019-03-22 | 2024-03-26 | Kemflo (Nanjing) Environmental Technology Co., Ltd. | Flow guide mesh, membrane element, and filter assembly |
| CN113101807A (en) * | 2021-04-06 | 2021-07-13 | 九章膜(北京)科技有限公司 | Membrane module, membrane equipment with membrane module and membrane system |
| CN114307657A (en) * | 2021-10-29 | 2022-04-12 | 浙江沁园水处理科技有限公司 | Roll up membrane structure and filter element subassembly with antipollution ability |
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| CN102166477B (en) | 2013-03-20 |
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Address after: 211200 No. 9 Zhongxing West Road, Lishui Economic Development Zone, Jiangsu, Nanjing Patentee after: A.O. SMITH (NANJING) WATER TREATMENT PRODUCTS CO., LTD. Address before: 201107 No. 1418, Zhai Lu, Minhang District, Shanghai Patentee before: A. O. Smith (Shanghai) Water Treatment Products Co., Ltd. |