CN104069740A - Alkaline cleaner special for reverse osmosis membrane and application method - Google Patents
Alkaline cleaner special for reverse osmosis membrane and application method Download PDFInfo
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- CN104069740A CN104069740A CN201410358520.XA CN201410358520A CN104069740A CN 104069740 A CN104069740 A CN 104069740A CN 201410358520 A CN201410358520 A CN 201410358520A CN 104069740 A CN104069740 A CN 104069740A
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- reverse osmosis
- osmosis membrane
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Abstract
The invention provides an alkaline cleaner special for a reverse osmosis membrane. The alkaline cleaner special for the reverse osmosis membrane comprises nitrilotriacetic acid salt, complexonate, hydroxyethyl ethylene diamine, (2-Hydroxyethyl) ethylenediaminetriacetic acid salt, alcamines, a dispersant, a pH conditioning agent and deionized water, wherein the mass ratio of nitrilotriacetic acid salt, complexonate, hydroxyethyl ethylene diamine, (2-Hydroxyethyl) ethylenediaminetriacetic acid salt, alcamines, the dispersant to the pH conditioning agent is 1-10 to 2-10 to 2-15 to 10-40 to 10-30 to 2-10 and the balance is deionized water. The invention further provides an application method for the alkalinity cleaning agent special for the reverse osmosis membrane. The alkaline cleaner is convenient to use and excellent in effect, and causes no harm to membrane components.
Description
Technical field
The invention belongs to water treatment field, particularly a kind of alkaline cleaner for reverse osmosis membrane special use and application process.
Background technology
Counter-infiltration is a kind of function by means of permselectivity membrane, the membrane separation technique that the pressure reduction of take is power, and when system institute plus-pressure is greater than the osmotic pressure of solution, hydrone sees through film and enters central tube through producing water flow passage, at one end flows out.Enter the influent side that impurity (as hardness ions, colloid, organic matter, bacterium) in water is trapped within film, from dense water water side, flow out, thereby reach the object of isolation of purified.At present, reverse osmosis technology has been widely used in concentrated, electronic chemical and the medicine and other fields of desalinization, pure water preparation, boiler feedwater, wastewater treatment and drinking-water, beverage, chemical products.
Reverse osmosis unit is after operation a period of time, and on film, dense water side can accumulate the materials such as colloid, metal oxide, bacterium, organic matter, inorganic scale, causes the problems such as the decline of system salt rejection rate, water yield reduction, pressure reduction increase, thereby can form film, pollutes.Now, carry out Chemical cleaning to recover good running status to reverse osmosis membrane.
At present, the cleaning way of reverse osmosis membrane is divided into off-line cleaning way and on-line cleaning mode.Off-line cleans and to refer to reverse osmosis membrane is split out from system, and single membrane component is carried out to Chemical cleaning, and this cleaning way Chemical cleaning is thorough, and cleaning performance is good, but scavenging period is longer, and cleaning charge is with high.Therefore, on-line cleaning mode is more conventional, and conventional on-line cleaning is mainly the cleaning that utilizes the cleaning corollary apparatus that is connected with system to carry out anti-seepage membrane, the feature of on-line cleaning is that scavenging period is short, easy to operate, expense is cleaned low compared with off-line, but cleaning performance is poor compared with off-line cleaning.
Chemical cleaning formula pin in existing cleaning technique is not strong, cleans, for some special contaminations or the more serious membrane component of damage ratio, often DeGrain although be applicable to some contaminated membrane components.Therefore, in the urgent need to developing a kind of reverse osmosis membrane scavenger specially of convenient and practical effect excellence.
Summary of the invention
The object of the present invention is to provide the special-purpose alkaline cleaner of a kind of reverse osmosis membrane, and utilize described reverse osmosis membrane scavenger specially to carry out the concrete application process of on-line cleaning.
The technical solution adopted in the present invention is as follows:
The special-purpose alkaline cleaner of reverse osmosis membrane, containing NTA salt, edetate, hydroxyethylethylene diamine tri-acetic acid salt, alcamines, dispersant, pH adjusting agent and deionized water.The percentage by weight of each component is:
NTA salt 1～10%
Edetate 2～10%
Hydroxyethylethylene diamine tri-acetic acid salt 2～15%
Alcamines 10～40%
Dispersant 10～30%
PH value conditioning agent 2～10%
All the other are deionized water.
Described NTA salt is one or both combination of NTA, sodium nitrilo triacetate.
Described edetate is a kind of of disodium ethylene diamine tetraacetate, tetrasodium ethylenediamine tetraacetate.
Described hydroxyethylethylene diamine tri-acetic acid salt is one or both combination of N-hydroxyethyl-ethylenediamine triacetic acid, N-hydroxyethyl-ethylenediamine triacetic acid trisodium.
Described alcamines is one or more combination of monoethanolamine, diethanol amine, triethanolamine, monoisopropanolamine, diisopropanolamine (DIPA) and triisopropanolamine.
Described dispersant is one or more the combination in poly-aspartic-acid, poly-epoxy succinic acid, AA/AMPS, AA/AHPS co-polymer of sulfonate, carboxylate-sulfonate-nonionic terpolymer, acrylic acid-acrylate-phosphonic acids-sulfonate quadripolymer.
Described pH value conditioning agent is a kind of of NaOH, potassium hydroxide.
Further, the invention provides the application process that the special-purpose alkalescence of a kind of described reverse osmosis membrane is cleaned, concrete application process: be used alternatingly described alkaline cleaner and counter-infiltration acidic cleaner carries out online Chemical cleaning to reverse osmosis membrane.
Described acid cleaning comprises: the citric acid that mass fraction is 1～3% and glycolic acid solution, pH value is 2～3.
Described application process is to use respectively acid reverse osmosis membrane cleaning agent to carry out on-line cleaning to counter-infiltration, then uses alkaline cleaner to carry out on-line cleaning to reverse osmosis membrane.The present invention is not specifically limited the order of soda acid cleaning agent, can determine cleaning sequence according to the concrete condition of pollutant.
Embodiment mono-
Choose by weight percentage raw material
Sodium nitrilo triacetate 5%
Tetrasodium ethylenediamine tetraacetate 5%
Hydroxyethylethylene diamine tri-acetic acid 10%
Triethanolamine 30%
Poly-aspartate 15%
NaOH 3%
All the other are deionized water.
By deionized water, sodium nitrilo triacetate, tetrasodium ethylenediamine tetraacetate, hydroxyethylethylene diamine tri-acetic acid, triethanolamine, poly (sodium aspartate) and NaOH, in proportion each component raw material is added in reactor, fully stir 45～75 minutes, can obtain required product.
Embodiment mono-
Choose by weight percentage raw material
Sodium nitrilo triacetate 5%
Tetrasodium ethylenediamine tetraacetate 5%
Trisodium hydroxyethylene diamine triacetate 15%
Triethanolamine 25%
Poly-aspartate 20%
NaOH 3%
All the other are deionized water.
By deionized water, sodium nitrilo triacetate, tetrasodium ethylenediamine tetraacetate, trisodium hydroxyethylene diamine triacetate, triethanolamine, poly (sodium aspartate) and NaOH, in proportion each component raw material is added in reactor, fully stir 45～75 minutes, can obtain required product.
Claims (9)
1. the special-purpose alkaline cleaner of reverse osmosis membrane, contains NTA salt, edetate, hydroxyethylethylene diamine tri-acetic acid salt, alcamines, dispersant, pH adjusting agent and deionized water, and the percentage by weight of each component is:
NTA salt 1～10%
Edetate 2～10%
Hydroxyethylethylene diamine tri-acetic acid salt 2～15%
Alcamines 10～40%
Dispersant 10～30%
PH value conditioning agent 2～10%
All the other are deionized water.
2. the NTA salt described in the special-purpose alkaline cleaner of reverse osmosis membrane according to claim 1 is one or both combination of NTA, sodium nitrilo triacetate.
3. the edetate described in the special-purpose alkaline cleaner of reverse osmosis membrane according to claim 1 is a kind of of disodium ethylene diamine tetraacetate, tetrasodium ethylenediamine tetraacetate.
4. the hydroxyethylethylene diamine tri-acetic acid salt described in the special-purpose alkaline cleaner of reverse osmosis membrane according to claim 1 is one or both combination of N-hydroxyethyl-ethylenediamine triacetic acid, N-hydroxyethyl-ethylenediamine triacetic acid trisodium.
5. the alcamines described in the special-purpose alkaline cleaner of reverse osmosis membrane according to claim 1 is one or more combination of monoethanolamine, diethanol amine, triethanolamine, monoisopropanolamine, diisopropanolamine (DIPA) and triisopropanolamine.
6. the dispersant described in the special-purpose alkaline cleaner of reverse osmosis membrane according to claim 1 is one or more the combination in poly-aspartic-acid, poly-epoxy succinic acid, AA/AMPS, AA/AHPS co-polymer of sulfonate, carboxylate-sulfonate-nonionic terpolymer, acrylic acid-acrylate-phosphonic acids-sulfonate quadripolymer.
7. the pH value conditioning agent described in the special-purpose alkaline cleaner of reverse osmosis membrane according to claim 1 is a kind of of NaOH, potassium hydroxide.
8. the application process that the special-purpose alkalescence of described reverse osmosis membrane is cleaned, concrete application process: be used alternatingly described alkaline cleaner and counter-infiltration acidic cleaner carries out online Chemical cleaning to reverse osmosis membrane.
9. in application process according to claim 8, acid cleaning comprises: the citric acid that mass fraction is 1～3% and glycolic acid solution, pH value is 2～3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410358520.XA CN104069740B (en) | 2014-07-26 | 2014-07-26 | The special alkaline cleaner of reverse osmosis membrane and application process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410358520.XA CN104069740B (en) | 2014-07-26 | 2014-07-26 | The special alkaline cleaner of reverse osmosis membrane and application process |
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| Publication Number | Publication Date |
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| CN104069740A true CN104069740A (en) | 2014-10-01 |
| CN104069740B CN104069740B (en) | 2016-06-22 |
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| CN201410358520.XA Active CN104069740B (en) | 2014-07-26 | 2014-07-26 | The special alkaline cleaner of reverse osmosis membrane and application process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105457497A (en) * | 2015-11-29 | 2016-04-06 | 洛阳绿仁环保设备有限公司 | Ceramic membrane cleaning agent |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070015680A1 (en) * | 2003-02-25 | 2007-01-18 | Kurita Water Industries Ltd. | Detergent for selectively permeable film and method for cleaning |
| CN103341325A (en) * | 2013-06-18 | 2013-10-09 | 吴章锋 | Dual-purpose film cleaning agent and its preparation method and use |
| CN103463992A (en) * | 2013-09-30 | 2013-12-25 | 武汉钢铁(集团)公司 | Cleaning fluid for water treatment ultrafiltration membranes |
| CN103657427A (en) * | 2012-09-03 | 2014-03-26 | 湖州欧美新材料有限公司 | Hollow fiber ultrafiltration membrane cleaning agent and preparation method thereof |
| CN103861461A (en) * | 2012-12-14 | 2014-06-18 | 广州科宝水处理科技有限公司 | Cleaning method of reverse osmosis membranes |
-
2014
- 2014-07-26 CN CN201410358520.XA patent/CN104069740B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070015680A1 (en) * | 2003-02-25 | 2007-01-18 | Kurita Water Industries Ltd. | Detergent for selectively permeable film and method for cleaning |
| CN103657427A (en) * | 2012-09-03 | 2014-03-26 | 湖州欧美新材料有限公司 | Hollow fiber ultrafiltration membrane cleaning agent and preparation method thereof |
| CN103861461A (en) * | 2012-12-14 | 2014-06-18 | 广州科宝水处理科技有限公司 | Cleaning method of reverse osmosis membranes |
| CN103341325A (en) * | 2013-06-18 | 2013-10-09 | 吴章锋 | Dual-purpose film cleaning agent and its preparation method and use |
| CN103463992A (en) * | 2013-09-30 | 2013-12-25 | 武汉钢铁(集团)公司 | Cleaning fluid for water treatment ultrafiltration membranes |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105457497A (en) * | 2015-11-29 | 2016-04-06 | 洛阳绿仁环保设备有限公司 | Ceramic membrane cleaning agent |
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| CN104069740B (en) | 2016-06-22 |
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Denomination of invention: Special alkaline cleaning agent for reverse osmosis membrane and its application Effective date of registration: 20210311 Granted publication date: 20160622 Pledgee: Bank of China Limited Weihai Branch Pledgor: WEIHAI XIANGYU TECHNOLOGY Co.,Ltd. Registration number: Y2021980001593 |
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Date of cancellation: 20230303 Granted publication date: 20160622 Pledgee: Bank of China Limited Weihai Branch Pledgor: WEIHAI XIANGYU TECHNOLOGY CO.,LTD. Registration number: Y2021980001593 |