CN102309925A - Method for cleaning microfiltration membrane - Google Patents
Method for cleaning microfiltration membrane Download PDFInfo
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- CN102309925A CN102309925A CN201110249375A CN201110249375A CN102309925A CN 102309925 A CN102309925 A CN 102309925A CN 201110249375 A CN201110249375 A CN 201110249375A CN 201110249375 A CN201110249375 A CN 201110249375A CN 102309925 A CN102309925 A CN 102309925A
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- water tank
- microfiltration
- cleaning
- micro
- filtration
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Abstract
A method for cleaning a microfiltration membrane belongs to the field of industrial water treatment; an alkali washing water tank and a clear water tank are included; the invention is characterized in that the method comprises the following steps: supplying water for the alkali washing water tank for 10 min with a flow rate of 30 t/h; when water is supplied for 5 min, adding a drug, adding sodium hypochlorite for 5 min with a flow rate of 0.5 t/h to obtain a concentration of 500-900 ppm; during drug addition, starting an alkali cleaning pump and a circulating stirring valve, performing circulating stirring of the drug solution for 10 min to allow the drug solution to be stirred uniformly; after the drug solution is stirred uniformly, performing primary microfiltration backwashing; when the microfiltration backwashing is finished, performing primary air scrubbing; when the air scrubbing is finished, discharging the microfiltration cleaning solution; cleaning a microfiltration device and a microfiltration cleaning pipeline by clear water in the clear water tank. The invention can recover the filtration capacity of the microfiltration membrane; can recover the water production capability of the microfiltration membrane; and reduces the cost for membrane filament replacement.
Description
Technical field
The invention belongs to the Treatment of Industrial Water field.
Background technology
At present, microfiltration systems is through carrying out high-frequency backwash and air bump rinse operation, keeping the surperficial cleaning of film, and then can keep operation steady in a long-term.Yet backwash and compressed air are cleaned and belonged to the cleaning of hydraulic shear mode physics, and is more effective to the particulate matter and the inorganic pollution on film surface, but to organic matter and microbial contamination effect and not obvious.
And organic matter and microbial contamination are the key factors that influences membrane flux.Because organic matter and microorganism are difficult to remove from the micro-filtration membrane surface through backwash and compressed air scouring; Make membrane flux sharply reduce through certain hour operation back; Aquifer yield descends, and has a strong impact on the safe and stable operation of subsequent film Processing Equipment and the water demand of production unit.
Summary of the invention
For organic matter and microbial contamination are effectively cleaned, the present invention proposes a kind of method of cleaning micro-filtration membrane.
The present invention includes alkali and clean water tank, filtered water tank, it is characterized in that: the flow according to 30t/h carries out moisturizing 10min to alkali cleaning water tank; Dosing in the time of moisturizing 5min, promptly the flow according to 0.5t/h adds clorox 5min, makes its concentration at 500～900ppm; Drive the alkali scavenging pump in the time of dosing and stir valve, soup is circulated stirred 10 minutes, soup is stirred with circulation; After stirring, soup carries out a micro-filtration backwash; After the micro-filtration backwash finishes, carry out primary air and clean; After air bump rinse operation finishes, the micro-filtration cleaning solution of draining; With the clear water in the filtered water tank microfiltration equipment and micro-filtration pipe blow-through are cleaned.
The present invention can make micro-filtration recover filter capacity; Can make micro-filtration recover water-yielding capacity, produce water water quality and meet design requirement; Reduced the expense that the film silk is changed.
The specific embodiment:
Embodiment: the equipment of present embodiment has the alkali that cleans up to clean water tank and filtered water tank.
1, inspection batch meter liquid level, various water pump, valve, equipment etc. all are in stand-by state;
2, clean water tank moisturizing 10min to alkali earlier, its discharge is 30t/h;
3, beginning during moisturizing 5 min to clean water tank enriching degree to alkali is that the liquor natrii hypochloritis of 500～900ppm (adjusts according to the water quality situation; It is 800mg/L that middle water and industrial wastewater adopt concentration; It is 500ppm that surface water adopts concentration); Drive the alkali scavenging pump simultaneously and stir valve with circulation, stirring circulates; The flow that adds the liquor natrii hypochloritis is 0.5t/h, and the time is 5min;
4, filtered water tank is mended full water;
5, carry out a micro-filtration backwash (this cleaning method is a known technology, omits the description of its detailed step);
6, after the micro-filtration backwash finishes, emptying micro-filtration back-washing equipment;
7, carry out low-intensity maintainability Chemical cleaning circulation 50min (low-intensity maintainability chemical cleaning method is a known technology, omits the description of its detailed step);
8, after low-intensity maintainability Chemical cleaning circulation circulation finishes, carry out primary air and clean;
9, after air bump rinse operation finishes, the low-intensity of draining maintainability Chemical cleaning solution;
10, opening the filtered water tank valve cleans microfiltration equipment and micro-filtration pipe blow-through.
Claims (1)
1. a method of cleaning micro-filtration membrane comprises alkali cleaning water tank, filtered water tank, it is characterized in that: the flow according to 30t/h carries out moisturizing 10min to alkali cleaning water tank; Dosing in the time of moisturizing 5min, promptly the flow according to 0.5t/h adds clorox 5min, makes its concentration at 500～900ppm; Drive the alkali scavenging pump in the time of dosing and stir valve, soup is circulated stirred 10 minutes, soup is stirred with circulation; After stirring, soup carries out a micro-filtration backwash; After the micro-filtration backwash finishes, carry out primary air and clean; After air bump rinse operation finishes, the micro-filtration cleaning solution of draining; With the clear water in the filtered water tank microfiltration equipment and micro-filtration pipe blow-through are cleaned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110249375A CN102309925A (en) | 2011-08-29 | 2011-08-29 | Method for cleaning microfiltration membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110249375A CN102309925A (en) | 2011-08-29 | 2011-08-29 | Method for cleaning microfiltration membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102309925A true CN102309925A (en) | 2012-01-11 |
Family
ID=45423717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110249375A Pending CN102309925A (en) | 2011-08-29 | 2011-08-29 | Method for cleaning microfiltration membrane |
Country Status (1)
| Country | Link |
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| CN (1) | CN102309925A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991162A (en) * | 2017-12-26 | 2018-05-04 | 苏州市华测检测技术有限公司 | Particle analyte detection pre-processing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201433143Y (en) * | 2009-05-14 | 2010-03-31 | 浙江海啊水务有限公司 | External pressure type ultra-filtration membrane water purification device |
| CN102060394A (en) * | 2009-11-18 | 2011-05-18 | 东丽纤维研究所（中国）有限公司 | Sea water desalinization integrated process |
-
2011
- 2011-08-29 CN CN201110249375A patent/CN102309925A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201433143Y (en) * | 2009-05-14 | 2010-03-31 | 浙江海啊水务有限公司 | External pressure type ultra-filtration membrane water purification device |
| CN102060394A (en) * | 2009-11-18 | 2011-05-18 | 东丽纤维研究所（中国）有限公司 | Sea water desalinization integrated process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991162A (en) * | 2017-12-26 | 2018-05-04 | 苏州市华测检测技术有限公司 | Particle analyte detection pre-processing device |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120111 |