CN1994537A - Cleaning method for membrane filter device - Google Patents
Cleaning method for membrane filter device Download PDFInfo
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- CN1994537A CN1994537A CN 200610130222 CN200610130222A CN1994537A CN 1994537 A CN1994537 A CN 1994537A CN 200610130222 CN200610130222 CN 200610130222 CN 200610130222 A CN200610130222 A CN 200610130222A CN 1994537 A CN1994537 A CN 1994537A
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Abstract
The invention relates to a method for washing membrane filter, wherein it wash reversely and clockwise to clean the membrane element; when the flux and quality of membrane element are reduced, it starts to wash; stops feeding material into membrane element; clockwise pump washes the membrane element to fill washing liquid into the membrane; starts the reverse pump; stops washing; repeats aforementioned process until the flux of fiber membrane or capillary membrane is recovered. The invention can completely wash out the pollutant in the membrane, with low water consumption.
Description
Technical field
The present invention relates to a kind of cleaning method of membrane-filtering unit, the method that the mode that promptly adopts square impact and recoil cleaning to carry out is simultaneously cleaned membrane module.
Background technology
Because characteristics such as membrane separation technique energy-conserving and environment-protective, equipment are simple, easy and simple to handle make that the sector has obtained developing rapidly, and obtain extensive use.Especially doughnut filter membrane or capillary-pipe film be because the unit volume filter area is big, and the device fabrication expense is low, and can realize cross-flow filtration, makes characteristics such as prolong greatly in service life of film obtain more application.But the film pollution problems is the key issue that this technology obtains extensive use, and carrying out the film cleaning is the commonly used and important method that solves membrane pollution problem.Chemical cleaning need be selected suitable cleaning agent, and can produce the cleaning waste liquid, needs to select suitable physics cleaning method and frequency to prolong film service time in the actual motion of film, reduces the frequency of Chemical cleaning.In the physics cleaning method, commonly used have low-voltage high speed square impact and a recoil, and the recoil cleaning method is considered to a kind of effective physics waterpower cleaning method, but for polymeric membrane, cleaning performance is remarkable inadequately.Because when cleaning, the film deformation of filament, especially concerning inner pressed hollow-fibre membrane or capillary-pipe film, cleaning performance is usually bad.
Summary of the invention
The purpose of this invention is to provide a kind of cleaning method of membrane-filtering unit efficiently.
The present invention is achieved through the following technical solutions.Membrane-filtering unit described in the present invention comprises: membrane module; Head tank and feed pump; Purge tank, square impact pump and the recoil pump of cleaning fluid are housed; Product receiving tank that links to each other with membrane module and cleaning fluid receiving tank.
When the product flux of membrane module and quality have obvious reduction, promptly begin to clean; Stop to the membrane module charging, rinse water is carried out the square impact cleaning by the square impact pump to membrane module, makes in the film silk to be full of cleaning fluid, opens recoil pump again, and square impact and recoil are carried out simultaneously, stops square impact and recoil then simultaneously; Repeat said process, until the flux recovery of tunica fibrosa or capillary-pipe film, the flux of generally once just recoiling tunica fibrosa or capillary-pipe film can recover substantially.
Described square impact pump is 2～10s to the time that membrane module carries out the square impact cleaning, and the recoil pressure of opening recoil pump again is 1.0MPa～3MPa, and the time that square impact and recoil are carried out simultaneously is 10～30s.
Described membrane module can be inner pressed hollow fiber film assembly or inner pressed capillary-pipe film assembly.
The invention has the advantages that can fully make the pollutant in film surface and the fenestra be cleaned, cleaning performance is better, the more independent recoil of scavenging period is obviously shortened, and has reduced the rinse water consumption, has prolonged the service life of film.
Description of drawings
Fig. 1 is a process flow diagram of the present invention
Among Fig. 1: 1 be material-storage jar, 2 and 4 for the charging valve, 3 for feed pump, 5 for cleaning agent storage bin, 6 and 8 for the recoil pump valve, 7 for recoil pump, 9 and 11 for the square impact wash-out valve, 10 for the square impact pump, 12 for the products export valve, 13 for the product receiving tank, 14 for membrane module, 15 for dense water receive valve, 16 for cleaning fluid receive valve, 17 for cleaning fluid receiving tank, 18 be dense water receiving tank.
The specific embodiment
The invention provides a kind of cleaning method of membrane-filtering unit.In specific embodiment, what membrane module adopted is inner pressed polyvinyl chloride capillary milipore filter or inner pressed polypropylene hollow fiber micro-filtration membrane, feed water is that surface water or turbidity are the experiment water distribution of 10～30NTU, and rinse water is the RO pure water that produce in the laboratory, and the specific embodiment is as follows.
Through certain running time, the permeation flux of milipore filter or micro-filtration membrane and quality descend, and need clean.Valve-off 2,4 and pump 3, shut off valve 12 and 15 is opened valve 16, opens valve 9,11 and pump 10, membrane module is carried out square impact clean, and behind the 5s, opens valve 6,8 and pump 7, membrane module is just being recoiled cleaning 15s.Flush out water pollutant content when few when observing, stop flushing and resume production.Experimental result shows, adopts this cleaning method once to clean 20s flux is recovered.
Polyvinyl chloride capillary milipore filter device filters the fulvic acid solution of the about 5mg/L of TOC, when the membrane flux that pollutes drops to initial 25% the time, when adopting the cleaning method of recoil, the permeation flux that cleans caudacoria has only returned to 80% when initial, and adopts the present invention, promptly adopts square impact (the square impact flow velocity is 2.5mL/s) to be full of the film silk earlier, approximately behind the 3sec, begin recoil (recoil pressure be 2.0 Mpa), just recoiling carry out 20sec simultaneously after, the film silk flux of pollution returns to 99% when initial.
Embodiment 2
Polyvinyl chloride capillary milipore filter device filters the polysaccharide solution of the about 5mg/L of TOC, when the membrane flux that pollutes drops to initial 30% the time, when adopting the cleaning method of recoil, the permeation flux that cleans caudacoria has only returned to 85% when initial, and adopts the present invention, promptly adopts square impact (the square impact flow velocity is 2.8mL/s) to be full of the film silk earlier, approximately behind the 2.5sec, begin recoil (recoil pressure is 2.2Mpa), just recoiling carry out 15sec simultaneously after, the film silk flux of pollution returns to 99% when initial.
Polypropylene hollow fiber micro-filtration membrane device filters the laboratory water distribution of the about 15NTU of turbidity, when the membrane flux that pollutes drops to initial 20% the time, when adopting the cleaning method of recoil, the permeation flux that cleans caudacoria has only returned to 85% when initial, and adopts the present invention, promptly adopts square impact (the square impact flow velocity is 2.3mL/s) to be full of the film silk earlier, approximately behind the 2sec, begin recoil (recoil pressure is 1.5Mpa), just recoiling carry out 18sec simultaneously after, the film silk flux of pollution returns to 99% when initial.
Embodiment 4
Polypropylene hollow fiber micro-filtration membrane device filters the laboratory water distribution of the about 30NTU of turbidity, when the membrane flux that pollutes drops to initial 25% the time, when adopting the cleaning method of recoil, the permeation flux that cleans caudacoria has only returned to 80% when initial, and adopts the present invention, promptly adopts square impact (the square impact flow velocity is 2.6mL/s) to be full of the film silk earlier, approximately behind the 2.5sec, begin recoil (recoil pressure is 1.2Mpa), just recoiling carry out 20sec simultaneously after, the film silk flux of pollution returns to 99% when initial.
Claims (3)
1. the cleaning method of a membrane-filtering unit, described membrane-filtering unit comprises: membrane module; Head tank and feed pump; Purge tank, square impact pump and the recoil pump of cleaning fluid are housed; Product receiving tank that links to each other with membrane module and cleaning fluid receiving tank; This device is implemented operating cleaning method, it is characterized in that:
When the product flux of membrane module and quality have obvious reduction, promptly begin to clean; Stop to the membrane module charging, rinse water is carried out the square impact cleaning by the square impact pump to membrane module, makes in the film silk to be full of cleaning fluid, opens recoil pump again, and square impact and recoil are carried out simultaneously, stops square impact and recoil then simultaneously; Repeat said process, until the flux recovery of tunica fibrosa or capillary-pipe film, the flux of generally once just recoiling tunica fibrosa or capillary-pipe film can recover substantially.
2. the cleaning method of membrane-filtering unit as claimed in claim 1, it is characterized in that: described square impact pump is 2～10s to the time that membrane module carries out the square impact cleaning, the recoil pressure of opening recoil pump again is 1.5MPa～3MPa, and the time that square impact and recoil are carried out simultaneously is 10～30s.
3. the cleaning method of membrane-filtering unit as claimed in claim 1, it is characterized in that: described membrane module is inner pressed hollow fiber film assembly or inner pressed capillary-pipe film assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101302220A CN100471545C (en) | 2006-12-15 | 2006-12-15 | Cleaning method for membrane filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101302220A CN100471545C (en) | 2006-12-15 | 2006-12-15 | Cleaning method for membrane filter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1994537A true CN1994537A (en) | 2007-07-11 |
| CN100471545C CN100471545C (en) | 2009-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101302220A Expired - Fee Related CN100471545C (en) | 2006-12-15 | 2006-12-15 | Cleaning method for membrane filter device |
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| CN (1) | CN100471545C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103030193A (en) * | 2012-12-29 | 2013-04-10 | 上海安赐机械设备有限公司 | Membrane device for treating oilfield produced water for reinjection and treating method |
| CN103608297A (en) * | 2011-04-27 | 2014-02-26 | 生命吸管有限公司 | Water purification device |
| CN103933864A (en) * | 2014-04-23 | 2014-07-23 | 湖州森蓝环境工程有限公司 | Circulatory washing system of ultra-filtration device |
| CN103977710A (en) * | 2014-03-20 | 2014-08-13 | 河海大学 | Chemical cleaning method for inner-pressure-type membrane system |
| CN104107635A (en) * | 2014-06-18 | 2014-10-22 | 芜湖美的厨卫电器制造有限公司 | Internal pressure type hollow fiber ultrafilter membrane device |
| CN108434997A (en) * | 2018-06-15 | 2018-08-24 | 刘勇 | Double pump method Full automatic cleaning coiled wire cleans tubular type membranous system |
| CN109721133A (en) * | 2019-01-22 | 2019-05-07 | 威士邦（厦门）环境科技有限公司 | A kind of hollow-fibre membrane pot type water treatment facilities for strengthening cleaning |
| US11053141B2 (en) | 2013-10-28 | 2021-07-06 | Vestergaard Sa | Water purification device |
| CN113750809A (en) * | 2021-03-01 | 2021-12-07 | 上海大学 | Cleaning device and cleaning method of membrane reactor |
-
2006
- 2006-12-15 CN CNB2006101302220A patent/CN100471545C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103608297A (en) * | 2011-04-27 | 2014-02-26 | 生命吸管有限公司 | Water purification device |
| CN103608297B (en) * | 2011-04-27 | 2015-08-19 | 生命吸管有限公司 | Purifier |
| US9352252B2 (en) | 2011-04-27 | 2016-05-31 | Lifestraw Sa | Water purification device |
| CN103030193A (en) * | 2012-12-29 | 2013-04-10 | 上海安赐机械设备有限公司 | Membrane device for treating oilfield produced water for reinjection and treating method |
| US11053141B2 (en) | 2013-10-28 | 2021-07-06 | Vestergaard Sa | Water purification device |
| CN103977710A (en) * | 2014-03-20 | 2014-08-13 | 河海大学 | Chemical cleaning method for inner-pressure-type membrane system |
| CN103977710B (en) * | 2014-03-20 | 2016-09-28 | 河海大学 | A kind of inner pressed membranous system chemical cleaning method |
| CN103933864A (en) * | 2014-04-23 | 2014-07-23 | 湖州森蓝环境工程有限公司 | Circulatory washing system of ultra-filtration device |
| CN104107635A (en) * | 2014-06-18 | 2014-10-22 | 芜湖美的厨卫电器制造有限公司 | Internal pressure type hollow fiber ultrafilter membrane device |
| CN108434997A (en) * | 2018-06-15 | 2018-08-24 | 刘勇 | Double pump method Full automatic cleaning coiled wire cleans tubular type membranous system |
| CN109721133A (en) * | 2019-01-22 | 2019-05-07 | 威士邦（厦门）环境科技有限公司 | A kind of hollow-fibre membrane pot type water treatment facilities for strengthening cleaning |
| CN113750809A (en) * | 2021-03-01 | 2021-12-07 | 上海大学 | Cleaning device and cleaning method of membrane reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100471545C (en) | 2009-03-25 |
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Assignee: Hainan Aike Pharmaceutical Co.,Ltd. Assignor: Nankai University Contract record no.: 2010120000090 Denomination of invention: Cleaning method for membrane filter device Granted publication date: 20090325 License type: Exclusive License Open date: 20070711 Record date: 20100802 |
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Granted publication date: 20090325 Termination date: 20141215 |
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