CN105983342A - Method for cleaning ultrafiltration membrane - Google Patents
Method for cleaning ultrafiltration membrane Download PDFInfo
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- CN105983342A CN105983342A CN201510047449.8A CN201510047449A CN105983342A CN 105983342 A CN105983342 A CN 105983342A CN 201510047449 A CN201510047449 A CN 201510047449A CN 105983342 A CN105983342 A CN 105983342A
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- ultrafilter membrane
- cleaning method
- cleaning
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Abstract
The invention relates to a method for cleaning an ultrafiltration membrane. The method comprises the following steps: 1) adding one or a plurality of solutions of sodium hydroxide, potassium hydroxide and sodium carbonate with mass fraction of 0.1-0.3% by the first predetermined flow velocity, controlling a pH value at 12-14, performing circular cleaning with the first predetermined time; and 2) draining an aqueous alkali, adding a sodium hypochlorite solution with mass fraction of 10-15% according to the second predetermined flow velocity, controlling the pH value of 10-11, and performing circular cleaning with the second predetermined time. The method has the advantages of good cleaning effect and high cleaning efficiency, and is suitable for wide industrial application.
Description
Technical field
The present invention relates to ultrafiltration apparatus and clean field, particularly relate to the cleaning method of a kind of ultrafilter membrane.
Background technology
Ultrafiltration apparatus, is with ultrafilter membrane as core product, utilizes the interdiction capability of porous material, cuts with physics
The mode stayed removes a certain size impurity particle in water.Under pressure-driven, water in solution, organic low point
The material that son, inorganic ions equidimension are little can arrive the opposite side of film by the micropore on fibre wall, in solution
The large scale materials such as thalline, colloid, particulate matter, organic macromolecule are trapped, thus reach to sieve in solution
The purpose of different component.The industrial applicability of ultrafilter membrane is extremely extensive, the industry of the filtration of application for instance that
As in-line coagulation and the terminal processes of ultra-pure water in pure water and ultra-pure water preparation technology；Drinking water,
Mineral water purifies；The purification of industrial wastewater and sanitary sewage and recovery.Ultrafilter membrane along with the progress of technology, its
Screening function will be improved and strengthened, to the contribution of human society also by increasing.
Ultrafilter membrane must carry out routine cleaning, to keep certain film permeation flux, and extends the life-span of film.
The character of character and process feed liquid that cleaning method is typically based on film determines.Modal method is that physics is clear
Washing method.Physical method is the pollutant utilizing the power of apparatus to remove film surface, does not has any chemical reaction,
Fairly simple.Such as, 1, be not the removable ultra-filtration element of extra fine for general fenestra, can be straight
Connect and take apart with soft substance side polished while rinsing with clear water.2, clean, according to membrane tube diameter with sponge ball
Size, selects suitable sponge ball, utilizes special equipment to carry out wiping cleaning by membrane tube, can repeatedly make
With.3, hot water injection's method heats the water to (30-40 DEG C), then flushing membrane surface, removes sticky or thermosol
Property impurity.
But, above-mentioned physical cleaning method is not satisfactory, it is difficult to clean the molecule of residual on ultrafilter membrane organic
Thing, oils and fats etc..
So, need the cleaning method of a kind of ultrafilter membrane badly to reach more preferable cleaning performance.
Summary of the invention
It is an object of the invention to provide the cleaning method of a kind of ultrafilter membrane, its cleaning performance is good, and cleans effect
Rate is high, is suitable to industrial extensive application.
For achieving the above object, the ultrafilter membrane cleaning method of the present invention, comprise the following steps:
(1) with first predetermined flow velocity add mass fraction be 0.1%～0.3% sodium hydroxide, potassium hydroxide,
One or more solution in sodium carbonate, and control pH value 12～14, first scheduled time of wash cycles；
And
(2) drain and add, with the second predetermined flow velocity, the sodium hypochlorite that mass fraction is 10%～15% after aqueous slkali
Solution, and control pH value 10～11, second scheduled time of wash cycles.
Compared with prior art, the ultrafilter membrane cleaning method of the present invention caustic dip by secondary, and utilize
Clean pump wash cycles static soak, thus the materials such as the organic impurities removed on ultrafilter membrane, oils and fats are had
Splendid cleaning performance, is suitable to industrial extensive application.
It is preferred that described step (1) goes back static soak 20～50 minutes.
It is preferred that described first predetermined flow velocity is 80～110 ton hour, described first scheduled time is 20～50
Minute.
It is preferred that described step (1) carries out pH value regulation by addition hydrochloric acid.
It is preferred that described step (2) also includes static soak 20～50 minutes.
It is preferred that also include after static soak in described step (2): with flow velocity be 350～400 tons/
Hour back flush.
It is preferred that described second predetermined flow velocity is 80～110 ton hour, described second scheduled time is 20～50
Minute.
It is preferred that also include repeating said steps (1).
Detailed description of the invention
Below in conjunction with embodiment, the ultrafilter membrane cleaning method of the present invention is described further, but is not so limited
The present invention.
The ultrafilter membrane cleaning method of the present invention uses caustic dip, especially to the organic impurities of residual on ultrafilter membrane
Having good cleaning performance with oils and fats etc., the material type of ultrafilter membrane is not limiting as by the present invention, can be by regulation
The pH value of alkali liquor selects.
The cleaning method of the present invention is carried out in ultrafiltration system, and the cleaning equipment of utilization includes cleaning pump.
First embodiment of the present invention comprises the following steps:
The first, highly basic cleaning step: add the hydrogen-oxygen that mass fraction is 0.1%～0.3% with the first predetermined flow velocity
Change one or more solution in sodium, potassium hydroxide, sodium carbonate, and control pH value 12～14, circulation cleaning
Washed for first scheduled time；
The second, weak base cleaning step: adding mass fraction with the second predetermined flow velocity after aqueous slkali of draining is
The liquor natrii hypochloritis of 10%～15%, and control pH value 10～11, second scheduled time of wash cycles.
It is preferred that the predetermined flow velocity in first, second step is 80～110 ton hour, such as 100 tons/
Hour, the scheduled time is 20～50 minutes, such as 30 minutes.
A preferred embodiment of the present invention be will be described below.
Alkali liquor in this highly basic cleaning step can be the one in sodium hydroxide, potassium hydroxide, sodium carbonate or many
Planting solution, its mass fraction is 0.1%.Before utilizing cleaning pump that alkali liquor is sent into ultrafiltration system, alkali liquor needs thing
First it is equipped with in filtered water tank, and by adding hydrochloric acid with adjustment pH value 12～14, such as pH value is 13.
Subsequently, clean pump, with the speed that flow velocity is 100 ton hour, slowly alkali liquor is sent into ultrafiltration system, and follow
Inscription of loop about 30 minutes.For reaching more preferable chemical reaction, after wash cycles, also include that stopping circulating pump entering
Row static soak, time a length of 20～50 minutes, within such as 30 minutes, be preferred.
After aforesaid highly basic cleans, waste liquid is drained, carries out the tune of weak base washing liquid, such as sodium hypochlorite
Join, and be 10～11 by add alkali liquor controlling pH value, as 10.5 are preferred.Subsequently, pump is cleaned with flow velocity
It is that liquor natrii hypochloritis is slowly sent into ultrafiltration system, and circular flow about 30 points by the speed of 100 ton hour
Clock, rear shutdown is soaked 30 minutes.In order to reach more preferably cleaning performance, after shutting down immersion process, control
System is cleaned pump and is carried out backwash procedure, and flow velocity at the uniform velocity rises to 350～400 ton hour from 100 ton hour are slow.
More preferably, forward can be changed into by control after reverse cleaning EP (end of program) and clean, observe and detect clear
Wash effect.For reaching more preferable cleaning performance, the present invention can consolidate by repeating above-mentioned highly basic cleaning step
Gu clean, then carry out weak base cleaning step once.
As an embodiment, the alkali liquor pH value of the present invention suitably can regulate in response to the material of ultrafilter membrane,
Thus adapt to the corrosion resistance of the material of ultrafilter membrane, ultrafilter membrane will not be caused damage.
In sum, the present invention caustic dip by secondary, and utilize cleaning pump wash cycles static leaching
Bubble, thus the materials such as the organic impurities removed on ultrafilter membrane, oils and fats are had splendid cleaning performance, be suitable to work
Extensive application in industry.
Above disclosed only presently preferred embodiments of the present invention, can not limit the present invention with this certainly
Interest field, the equivalent variations therefore made according to scope of the present invention patent, still belong to the present invention and contained
Scope.
Claims (8)
1. a cleaning method for ultrafilter membrane, comprises the following steps:
(1) with first predetermined flow velocity add mass fraction be 0.1%～0.3% sodium hydroxide, potassium hydroxide,
One or more solution in sodium carbonate, and control pH value 12～14, first scheduled time of wash cycles；
And
(2) drain and add, with the second predetermined flow velocity, the sodium hypochlorite that mass fraction is 10%～15% after aqueous slkali
Solution, and control pH value 10～11, second scheduled time of wash cycles.
2. the cleaning method of ultrafilter membrane as claimed in claim 1, it is characterised in that: described step (1) is also
Static soak 20～50 minutes.
3. the cleaning method of ultrafilter membrane as claimed in claim 1, it is characterised in that: described first pre-constant current
Speed is 80～110 ton hour, and described first scheduled time is 20～50 minutes.
4. the cleaning method of ultrafilter membrane as claimed in claim 1, it is characterised in that: in described step (1)
PH value regulation is carried out by adding hydrochloric acid.
5. the cleaning method of ultrafilter membrane as claimed in claim 1, it is characterised in that: described step (2) is also
Including static soak 20～50 minutes.
6. the cleaning method of ultrafilter membrane as claimed in claim 5, it is characterised in that: in described step (2)
Static soak after also include: be 350～400 ton hour back flushes with flow velocity.
7. the cleaning method of ultrafilter membrane as claimed in claim 1, it is characterised in that: described second pre-constant current
Speed is 80～110 ton hour, and described second scheduled time is 20～50 minutes.
8. the cleaning method of ultrafilter membrane as claimed in claim 1, it is characterised in that: also include that repetition is described
Step (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047449.8A CN105983342A (en) | 2015-01-29 | 2015-01-29 | Method for cleaning ultrafiltration membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047449.8A CN105983342A (en) | 2015-01-29 | 2015-01-29 | Method for cleaning ultrafiltration membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105983342A true CN105983342A (en) | 2016-10-05 |
Family
ID=57035128
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510047449.8A Pending CN105983342A (en) | 2015-01-29 | 2015-01-29 | Method for cleaning ultrafiltration membrane |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107174959A (en) * | 2017-04-24 | 2017-09-19 | 如东南天农科化工有限公司 | A kind of method for rapidly and efficiently cleaning UF films |
| CN108686519A (en) * | 2018-08-16 | 2018-10-23 | 南京化学工业园热电有限公司 | A kind of back-washing method of ultrafiltration apparatus |
| CN108771973A (en) * | 2018-05-16 | 2018-11-09 | 南京帝膜净水材料开发有限公司 | A kind of cleaning method of wound membrane element |
| CN108970412A (en) * | 2018-10-08 | 2018-12-11 | 济南大学 | A kind of cleaning method of ceramic membrane |
| CN110237715A (en) * | 2019-06-27 | 2019-09-17 | 埃姆媞（无锡）分离技术有限公司 | Seperation film filters the membrane flux restoration methods after PCB waste water |
| CN113648836A (en) * | 2021-05-12 | 2021-11-16 | 同济大学 | Method for controlling leakage of membrane source disinfection by-product precursor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407077A (en) * | 2011-12-09 | 2012-04-11 | 佛山市新泰隆环保设备制造有限公司 | Regenerating method and device of abandoned reverse osmosis membrane element |
| CN103537193A (en) * | 2013-11-05 | 2014-01-29 | 苏州腾纳环保科技有限公司 | Method for washing ultra-filtration membrane component |
| CN203803391U (en) * | 2014-04-23 | 2014-09-03 | 湖州森蓝环境工程有限公司 | Circulating washing system of ultra-filtration device |
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2015
- 2015-01-29 CN CN201510047449.8A patent/CN105983342A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407077A (en) * | 2011-12-09 | 2012-04-11 | 佛山市新泰隆环保设备制造有限公司 | Regenerating method and device of abandoned reverse osmosis membrane element |
| CN103537193A (en) * | 2013-11-05 | 2014-01-29 | 苏州腾纳环保科技有限公司 | Method for washing ultra-filtration membrane component |
| CN203803391U (en) * | 2014-04-23 | 2014-09-03 | 湖州森蓝环境工程有限公司 | Circulating washing system of ultra-filtration device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107174959A (en) * | 2017-04-24 | 2017-09-19 | 如东南天农科化工有限公司 | A kind of method for rapidly and efficiently cleaning UF films |
| CN108771973A (en) * | 2018-05-16 | 2018-11-09 | 南京帝膜净水材料开发有限公司 | A kind of cleaning method of wound membrane element |
| CN108686519A (en) * | 2018-08-16 | 2018-10-23 | 南京化学工业园热电有限公司 | A kind of back-washing method of ultrafiltration apparatus |
| CN108686519B (en) * | 2018-08-16 | 2020-11-27 | 南京化学工业园热电有限公司 | Backwashing method of ultrafiltration device |
| CN108970412A (en) * | 2018-10-08 | 2018-12-11 | 济南大学 | A kind of cleaning method of ceramic membrane |
| CN110237715A (en) * | 2019-06-27 | 2019-09-17 | 埃姆媞（无锡）分离技术有限公司 | Seperation film filters the membrane flux restoration methods after PCB waste water |
| CN110237715B (en) * | 2019-06-27 | 2021-08-17 | 埃姆媞（无锡）分离技术有限公司 | Membrane flux recovery method after PCB wastewater filtration by separation membrane |
| CN113648836A (en) * | 2021-05-12 | 2021-11-16 | 同济大学 | Method for controlling leakage of membrane source disinfection by-product precursor |
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