CN106492641A - A kind of stable reverse osmosis membrane alkaline cleaner - Google Patents
A kind of stable reverse osmosis membrane alkaline cleaner Download PDFInfo
- Publication number
- CN106492641A CN106492641A CN201610893206.0A CN201610893206A CN106492641A CN 106492641 A CN106492641 A CN 106492641A CN 201610893206 A CN201610893206 A CN 201610893206A CN 106492641 A CN106492641 A CN 106492641A
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- Prior art keywords
- reverse osmosis
- osmosis membrane
- alkaline cleaner
- sodium
- water
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
- B01D65/022—Membrane sterilisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/168—Use of other chemical agents
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Nanotechnology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to a kind of stable reverse osmosis membrane alkaline cleaner, belongs to infiltration technical field of membrane.The technical scheme is that：A kind of reverse osmosis membrane alkaline cleaner, containing sodium nitrilo triacetate 5 8%, EDTPA sodium 4.8 10%, triethanolamine 12 20%, citrate 5 7.8%, 17 28ppm of OIT, AEO 0.8 2%, balance of water.The invention provides a kind of stable reverse osmosis membrane alkaline cleaner, had both extended the resting period, had improve using effect again.
Description
Technical field：The present invention relates to a kind of stable reverse osmosis membrane alkaline cleaner, belongs to infiltration technical field of membrane.
Background technology：
Counter-infiltration is a kind of important water technology.At present, reverse osmosis technology be widely used in desalinization,
Pure water preparation, boiler feedwater, wastewater treatment and drinking-water, beverage, the concentration of chemical products, electronic chemical and medicine and other fields.
After reverse osmosis unit longtime running, colloid, metal oxide, bacterium, organic matter, water can be accumulated in concentrated water side on film
The materials such as dirt, cause fouling membrane.The formation of fouling membrane causes flux to reduce, and component inlet outlet pressure differential is raised, so as to affect reverse osmosis
The economy of saturating device.Fouling membrane is common problem in reverse osmosis technology application process, it has also become counter-infiltration system is long
The biggest obstacle of phase stable operation.As water supply source goes from bad to worse and pretreatment system design or the problem that runs, counter-infiltration
Fouling membrane shows as the combined pollution of serious multiple pollutant composition.Accordingly, it would be desirable to effectively practical cleaning technique is realizing
The operation steady in a long-term of counter-infiltration system.
Physical cleaning is mechanically to get on depollution thing from face, and this method has and do not introduce new pollutant, anti-
The features such as permeable membrane cleaning step is simple, but the method is only effective to polluting the film at initial stage, and cleaning performance can not be lasting.
Chemical Cleaning for Reverse Osmosis method, substantially logical using chemical reagent and deposit, dirt, corrosion product and impact
The pollutant that the reaction of other pollutants of amount speed and producing water water quality is gone in membrane removal.These chemical reagent include acid, alkali, chelating
Agent etc..At present, the cleaning way of reverse osmosis membrane is divided into offline cleaning way and on-line cleaning mode.Offline cleaning is referred to reverse osmosis
Permeable membrane is split out from system, carries out Chemical cleaning to single membrane component, and this cleaning way Chemical cleaning is thorough, cleaning performance
Good, but scavenging period is longer, and cleaning charge is high.Therefore, on-line cleaning mode is the more commonly used, and conventional on-line cleaning is mainly profit
The characteristics of cleaning anti-seepage membrane carried out with the cleaning corollary apparatus being connected with system, on-line cleaning, is short for scavenging period, operation
Convenient, expense clean more offline low, but cleaning performance clean more offline poor.Therefore, in the urgent need to exploitation is a kind of convenient and practical
The reverse osmosis membrane cleaning agent of excellent effect, to improve the effect of on-line cleaning.Existing alkaline cleaner is existed in storage process
The phenomenon of middle layering, affects using effect.
Content of the invention
Goal of the invention：It is an object of the invention to provide a kind of reverse osmosis membrane cleaning agent of convenient and practical excellent effect.
The technical scheme is that：A kind of reverse osmosis membrane alkaline cleaner, it is characterised in that containing NTA
Sodium, EDTPA sodium, triethanolamine, OIT, citrate, AEO and deionization
Water.
Currently preferred technical scheme is：The technical scheme is that：A kind of reverse osmosis membrane alkaline cleaner, its are special
Levy and be, containing sodium nitrilo triacetate 5-8%, EDTPA sodium 4.8-10%, triethanolamine 12-20%,
Citrate 5-7.8%, OIT 17-28ppm, AEO 0.8-2%, balance of water.
Currently preferred technical scheme is：The technical scheme is that：A kind of stable reverse osmosis membrane alkalescence cleaning
Agent, it is characterised in that containing sodium nitrilo triacetate 5.5-7%, EDTPA sodium 5-8%, triethanolamine 14-
18%, citrate 6-7%, OIT 20-26ppm, AEO 1-1.7%, balance of water.
Currently preferred technical scheme is：The technical scheme is that：A kind of reverse osmosis membrane alkaline cleaner, its are special
Levy and be, containing sodium nitrilo triacetate 5.5%, EDTPA sodium 8%, triethanolamine 14%, citrate
7%, OIT 20ppm, AEO 1%, balance of water.
Currently preferred technical scheme is：The technical scheme is that：A kind of reverse osmosis membrane alkaline cleaner, its are special
Levy and be, containing sodium nitrilo triacetate 6%, EDTPA sodium 5%, triethanolamine 18%, citrate
6%, OIT 26ppm, AEO 1.7%, balance of water.
Currently preferred technical scheme is：The technical scheme is that：A kind of reverse osmosis membrane alkaline cleaner, its are special
Levy and be, containing sodium nitrilo triacetate 5.8%, EDTPA sodium 7%, triethanolamine 16%, citrate
6.5%, OIT 24ppm, AEO 1.5%, balance of water.
In technical solution of the present invention, the water is deionized water.
In technical solution of the present invention, isothiazolinone compound is the new of internationally recognized efficient, low toxicity, broad-spectrum high efficacy
Type bactericide.OIT, is connect with microorganism with very strong suppression and killing action to common bacteria, fungi, algae etc.
After touch, which can rapidly and be irreversibly suppressed to grow, so as to cause the death of microbial cell.
Sodium nitrilo triacetate can form metal complex with various metals, can also suppress the growth of bacterium and fungi.
EDTPA sodium, triethanolamine, citrate can form metal complex with various metals.For very
Good complexing agent.
AEO of the present invention, is now used for starching in printing and dyeing industry, desizing, boiling-off, bleaching, carbon
The operation such as change and chlorination, being used in reverse osmosis membrane alkaline cleaner for the invention are served surely to composition
It is set for using, while improve clean result.
Technical solution of the present invention, by the reasonable compatibility of several components, generates synergy, can both kill counter-infiltration
Various mushrooms and algae in film, with can be good at removing each metal ion species.Product of the present invention deposits 6 months also not simultaneously
There is lamination, solve the problems, such as that existing reverse osmosis membrane alkaline cleaner is deposited and be layered for 3 months or so.
The using method of reverse osmosis membrane alkaline cleaner of the present invention, concrete application method：
In-site chemical cleaning is carried out to reverse osmosis membrane with counter-infiltration acidic cleaner first, alkalescence of the present invention is then used
Cleaning agent carries out in-site chemical cleaning.If seriously polluted, 2 times can be used alternatingly.
The acid cleaning includes：Mass fraction is 1～3% citric acid and hydroxyacetic acid solution, and pH value is 2～3.
Beneficial effect：The invention provides a kind of stable reverse osmosis membrane alkaline cleaner, had both extended the resting period, and
Improve using effect.
Embodiment 1, sodium nitrilo triacetate 5g, EDTPA sodium 10g, triethanolamine 12g, sodium citrate
7.8g, OIT 0.0017g, AEO 0.8g, plus deionized water is supplemented to 100g, stirs.
Embodiment 2, sodium nitrilo triacetate 8g, EDTPA sodium 4.8g, triethanolamine 20g, citric acid
Salt 5g, OIT 0.0028g, AEO 2g, plus deionized water is supplemented to 100g, stirs.
Embodiment 3, sodium nitrilo triacetate 5.5g, EDTPA sodium 8g, triethanolamine 14g, citric acid
Salt 7g, OIT 0.002g, AEO 1g, plus deionized water is supplemented to 100g, stirs.
Embodiment 4, sodium nitrilo triacetate 6g, EDTPA sodium 5g, triethanolamine 18g, citrate
6g, OIT 0.0026g, AEO 1.7g, plus deionized water is supplemented to 100g, stirs.
Embodiment 5, sodium nitrilo triacetate 5.8g, EDTPA sodium 7g, triethanolamine 16g, citric acid
Salt 6.5g, OIT 0.0024g, AEO 1.5g, plus deionized water is supplemented to 100g, stirs.
Test example 1, certain power plant, clean reverse osmosis membrane, after cleaning, the cycle of operation using embodiment of the present invention 1-5 product
Operation can be brought up to for 5.5 months 7.5-8.5 month by original operation.The dirt that product of the present invention thoroughly can be removed on film is described
Dye thing.
Test example 2, embodiment of the present invention 1-5 product, room temperature 18-25 degree are deposited 6 months, without lamination.
Claims (4)
1. a kind of stable reverse osmosis membrane alkaline cleaner, it is characterised in that containing sodium nitrilo triacetate 5.5-7%, second two
Amine tetramethyl phosphinic acids sodium 5-8%, triethanolamine 14-18%, citrate 6-7%, OIT 20-26ppm, fatty alcohol
APEO 1-1.7%, balance of water.
2. reverse osmosis membrane alkaline cleaner described in claim 1, it is characterised in that containing sodium nitrilo triacetate 5.5%, second two
Amine tetramethyl phosphinic acids sodium 8%, triethanolamine 14%, citrate 7%, OIT 20ppm, AEO
1%, balance of water.
3. reverse osmosis membrane alkaline cleaner described in claim 1, it is characterised in that containing sodium nitrilo triacetate 6%, ethylenediamine
Tetramethyl phosphinic acids sodium 5%, triethanolamine 18%, citrate 6%, OIT 26ppm, AEO
1.7%, balance of water.
4. reverse osmosis membrane alkaline cleaner described in claim 1, it is characterised in that containing sodium nitrilo triacetate 5.8%, second two
Amine tetramethyl phosphinic acids sodium 7%, triethanolamine 16%, citrate 6.5%, OIT 24ppm, aliphatic alcohol polyethenoxy
Ether 1.5%, balance of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610893206.0A CN106492641A (en) | 2016-09-29 | 2016-09-29 | A kind of stable reverse osmosis membrane alkaline cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610893206.0A CN106492641A (en) | 2016-09-29 | 2016-09-29 | A kind of stable reverse osmosis membrane alkaline cleaner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106492641A true CN106492641A (en) | 2017-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610893206.0A Pending CN106492641A (en) | 2016-09-29 | 2016-09-29 | A kind of stable reverse osmosis membrane alkaline cleaner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108795580A (en) * | 2017-07-26 | 2018-11-13 | 上海丰信环保科技有限公司 | A kind of cleaning agent for film organosilicon grease |
| CN116850789A (en) * | 2023-09-05 | 2023-10-10 | 杭州尚善若水环保科技有限公司 | Cleaning agent mixture and application thereof in cleaning reverse osmosis membrane |
-
2016
- 2016-09-29 CN CN201610893206.0A patent/CN106492641A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108795580A (en) * | 2017-07-26 | 2018-11-13 | 上海丰信环保科技有限公司 | A kind of cleaning agent for film organosilicon grease |
| CN116850789A (en) * | 2023-09-05 | 2023-10-10 | 杭州尚善若水环保科技有限公司 | Cleaning agent mixture and application thereof in cleaning reverse osmosis membrane |
| CN116850789B (en) * | 2023-09-05 | 2024-01-02 | 杭州尚善若水环保科技有限公司 | Cleaning agent mixture and application thereof in cleaning reverse osmosis membrane |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170315 |
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| WD01 | Invention patent application deemed withdrawn after publication |