CN104741006A - Reverse osmosis membrane detergent - Google Patents
Reverse osmosis membrane detergent Download PDFInfo
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- CN104741006A CN104741006A CN201510182517.1A CN201510182517A CN104741006A CN 104741006 A CN104741006 A CN 104741006A CN 201510182517 A CN201510182517 A CN 201510182517A CN 104741006 A CN104741006 A CN 104741006A
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Abstract
The invention relates to a membrane detergent for removing polyacrylamide pollutants on a reverse osmosis membrane. According to the membrane detergent, an acid chemical detergent and an alkali detergent are prepared and are utilized for dissolving, dispersing, stripping and removing polyacrylamide on the surface of the polluted reverse osmosis membrane and organic and inorganic pollutants encapsulated by the polluted reverse osmosis membrane in a targeted manner. The membrane detergent has the characteristics that the preparation is simple, raw materials are conveniently and easily available, contributing water flux of the reverse osmosis membrane can be rapidly recovered, and reverse osmosis membrane elements are not damaged.
Description
Technical field
The present invention relates to a kind of reverse osmosis membrane detergent, particularly a kind of film detergent of polyacrylamide pollutant on reverse osmosis membrane.
Background technology
Current reverse osmosis membrane water treatment technology is one of main method of advanced treatment of wastewater reuse.Due to the fresh water (FW) in chemical industry, petrochemical industry, steel and iron industry, cooling circulating water sewer, there is water quality inferiority, water quality complexity, colloid, bacterium algae content high, easily counter-infiltration system is caused dirty stifled.Contaminated rear reverse osmosis membrane dirt occurring stifled there will be exhaustion phenomenon, and cause membrane component pressure reduction in running to rise, salt rejection rate, flow decline, and even cannot normally work.
Polyacrylamide is a kind of macromolecular compound, as flocculant conventional in sewage disposal process, can produce good flocculation.Before carrying out reverse osmosis membrane processing, most of polyacrylamide and flocculate thereof can be removed through processes such as filtration and ultrafiltration, but because pretreatment mode is improper, add the problems such as chemicals system is abnormal, a small amount of polyacrylamide and flocculate thereof may enter subsequent cell, along with the increase of counter-infiltration running time, reverse osmosis membrane just may occur dirty stifled, thus affects the normal work of counter-infiltration system.
Polyacrylamide pollutant is normal to combine with other organic pollutions, and pollutant composition complexity also has colloid property.Although conventional detergent is applicable to general contaminated membrane component cleaning, but it is not good enough to the reverse-osmosis membrane element cleaning performance polluted by polyacrylamide, thoroughly can not solve the cleaning problem of this pollutant, the membrane component causing system to have to more renew, cause the waste for no reason of cost.Therefore, in the urgent need to developing a kind of convenience and high-efficiency, to the harmless film detergent that can be used for cleaning polyacrylamide pollutant on reverse osmosis membrane of membrane component.
Summary of the invention
An object of the present invention is to provide a kind of film detergent for cleaning reverse osmosis membrane, this detergent is for the polyacrylamide pollutant cleaned on reverse osmosis membrane and other organic matters mutually wrapped up with it.
The present invention adopts following technical scheme:
For cleaning a film detergent for reverse osmosis membrane, it is characterized in that this film detergent is divided into acid detergent or alkaline detergent, described acid detergent comprises acid, reducing agent, bactericide, Yan Heshui; Described alkaline detergent comprises alkali, surfactant, complexing agent, salt, alcohol, ketone and water.
Acid in described acid detergent is one or more in hydrochloric acid, oxalic acid, nitric acid, citric acid, hydrofluoric acid, and uses hydrochloric acid or salpeter solution that pH value is adjusted to 2-3;
Described reducing agent is sodium hydrogensulfite, and its mass concentration is 0.05-1.0%;
Described bactericide is non oxidizing bactericide, and described non oxidizing bactericide is the formalin of 10-300ppm OIT or 0.1%-1.5% mass concentration;
Described salt is sodium chloride, sodium nitrate, potassium chloride or potassium nitrate, and mass concentration is 1-10%.
Alkali in described alkaline detergent is the mixture of NaOH or NaOH and sodium carbonate, uses NaOH adjust ph to be 10-12;
Described surfactant is neopelex, and its mass concentration is 0.1-0.2%;
Described complexing agent is sodium phosphate trimer, tetrasodium ethylenediamine tetraacetate (EDTA tetra-sodium) or diethylenetriamine pentacarboxylic acid five sodium (DTPA five sodium), and its mass concentration is 0.1-2.0%;
Described salt is sodium chloride, sodium nitrate, potassium chloride or potassium nitrate, and mass concentration is 1-10%;
Described alcohol, ketone can be one or more in acetone, ethanol, ethylene glycol, butanols, and the total mass concentration of contained alcohol, ketone is 0.1-2.0%.
Preferred, the aqueous solvent for preparing detergent is selected from counter-infiltration system and produces water, distilled water or industrial fresh water.
Another object of the present invention is to provide the using method of above-mentioned film detergent.
In the present invention, two class film detergents can be used alone and also can be used alternatingly.When two class medicaments are used alternatingly, if major pollutants are inorganic matters, cleaning order can be first use acid detergent to re-use alkaline detergent, if major pollutants are organic matters, then can first use alkaline detergent to re-use acid detergent.For improving cleaning performance, before use detergent cleans, according to the pollution level of reverse osmosis membrane, contaminated membrane component can be put into detergent and soaking 2-72h.
In the use procedure of this detergent, the dirt that carbonate dirt, most metal oxide that acid detergent wherein may be existed on the surface by chemical reaction cleaning membrane component under pH value 2-3 condition cause is blocked up; Alkaline detergent utilizes the synergy of surfactant, complexing agent, bleeding agent etc. to remove polyacrylamide pollutant and removes part calcium bicarbonate, magnesium bicarbonate, stripping microorganism mucous membrane and other organic matters of wrapping up with polyacrylamide pollutant that may exist under pH value 10-12 condition; The osmotic pressure that salt mainly adjusts detergent is there is in two class detergents, in cleaning process, the salinity of detergent side is much larger than the salinity of producing water side, if the product water side of the reverse osmosis membrane of cleaning has sufficient pure water to supply, meanwhile, under suitable cleaning pressure, just can there is film and produce water side pure water through film, to the infiltration flowing in detergent, be different from original counter-infiltration, be just referred to as just to permeate.By just permeating, water defines through membrane flow and rinses the dirt physics on film surface, plays stripping effect.Use this detergent can effectively wash-out polyacrylamide pollutant and with its a small amount of inorganic pollution mutually wrapped up and organic pollution, after cleaning, the operating flux of reverse osmosis membrane and pressure reduction all can return to the level before pollution substantially.
Adopt the film detergent in the present invention, Chemical cleaning is carried out to the reverse-osmosis membrane element polluted due to polyacrylamide, the polyacrylamide pollutant of membrane module adsorption and all can obtain effective wash-out with its a small amount of inorganic pollution mutually wrapped up and organic pollution, and the operating flux of reverse-osmosis membrane element, run pressure reduction and salt rejection rate all substantially can return to pollution before level, therefore effectively can ensure the continuous and steady operation of reverse osmosis membrane water treatment procedure.
Provided by the invention on reverse osmosis membrane the film detergent of polyacrylamide pollutant possess following beneficial effect: the preparation of the detergent that uses is simple, and raw material is conveniently easy to get; Effectively can remove polyacrylamide pollutant on reverse osmosis membrane, energy
Enough very fast permeant fluxes recovering reverse osmosis membrane; To reverse-osmosis membrane element without damage.
Detailed description of the invention
Be described in further detail technical scheme of the present invention below in conjunction with embodiment, protection scope of the present invention is not limited to following detailed description of the invention.
Embodiment 1
Select eastern beautiful reverse-osmosis membrane element TML20-370 as experiment film, be under the condition of 25 DEG C in water temperature, use the aqueous solution that pure water prepares calcium chloride, concentration of sodium carbonate is 10ppm, in this solution, add sodium chloride, make the total salinity of solution be 2000mg/L.Use this solution as former water, in former water, add PAMA (molecular weight 1,200 ten thousand, calm and peaceful water treatment Co., Ltd), concentration is 10mg/L, run after 2 hours, intake pressure 1.5MPa, flow of inlet water becomes 7.4t/h, dense water pressure 0.9MPa, produce water 0.53t/h, producing water salt content is 42mg/L, and Parameters variation illustrates that film is contaminated, wherein salt rejection rate has a little decline, and permeant flux declines 65%.
Get the above-mentioned membrane component by polyacrylamide pollution and carry out cleaning operation.
The film detergent formulations used is:
Acid detergent: containing acid, reducing agent, bactericide, Yan Heshui in such detergent; Detergent contains the nitric acid that mass fraction is 0.5%, uses hydrochloric acid that pH value is adjusted to 2; Reducing agent is sodium hydrogensulfite, its mass concentration is 0.5%; For preventing microorganism growth and breeding on membrane component, add non oxidizing bactericide in a medicament, 200ppm OIT; The mass concentration of sodium chloride is 3%; Aqueous solvent for preparing detergent is selected from counter-infiltration system and produces water.
Alkaline detergent: containing alkali, surfactant, complexing agent, salt, alcohol and water in such detergent; Alkali in detergent is NaOH, uses NaOH adjust ph to be 12; Surfactant is neopelex, and its mass concentration is 0.1%; Complexing agent is EDTA tetra-sodium, and its mass concentration is 2.0%; The mass concentration of sodium chloride is 3%; The mass concentration of ethanol is 0.5%; Aqueous solvent for preparing detergent is selected from counter-infiltration system and produces water.
Before cleaning, first the membrane component polluted by polyacrylamide is soaked 24h in alkaline detergent.After immersion, first use acid detergent to carry out the flushing of low pressure high flow rate to film, re-use alkaline detergent afterwards and carry out the flushing of low pressure high flow rate to membrane component, concrete cleaning performs according to correlated process in the product technology handbook of membrane component.After continuous wash, 25 DEG C, intake pressure 1.5MPa, under sodium chloride content is the standard conditions of 2000ppm in former water, performance test is carried out to the membrane component after cleaning, test result is, flow of inlet water 10t/h, dense water pressure 1.4MPa, produce water 1.44t/h, produce water salt content 12mg/L.Test result shows, the polyacrylamide pollutant on reverse osmosis membrane obtains to be removed effectively, and the flux recovery of membrane component is to new membrane component 96%.
Embodiment 2
Select eastern beautiful reverse-osmosis membrane element TML20-370 as experiment film, be under the condition of 25 DEG C in water temperature, use the aqueous solution that pure water prepares calcium chloride, concentration of sodium carbonate is 10ppm, in this solution, add sodium chloride, make the total salinity of solution be 2000mg/L.Use this solution as former water, in former water, add PAMA (molecular weight 1,200 ten thousand, calm and peaceful water treatment Co., Ltd), concentration is 10mg/L, run after 2 hours, intake pressure 1.5MPa, flow of inlet water becomes 7.4t/h, dense water pressure 0.9MPa, produce water 0.54t/h, producing water salt content is 48mg/L, and Parameters variation illustrates that film is contaminated, wherein salt rejection rate has a little decline, and permeant flux declines 64%.
Get the above-mentioned membrane component by polyacrylamide pollution and carry out cleaning operation.
The film detergent formulations used is:
Acid detergent: containing acid, reducing agent, bactericide, Yan Heshui in such detergent; Detergent contains the nitric acid that mass fraction is 0.5%, uses hydrochloric acid that pH value is adjusted to 2; Reducing agent is sodium hydrogensulfite, its mass concentration is 1.0%; For preventing microorganism growth and breeding on membrane component, add non oxidizing bactericide in a medicament, 200ppm OIT; The mass concentration of sodium chloride is 10%; Aqueous solvent for preparing detergent is selected from counter-infiltration system and produces water.
Alkaline detergent: containing alkali, surfactant, complexing agent, salt, alcohol and water in such detergent; Alkali in detergent is NaOH, uses NaOH adjust ph to be 12; Surfactant is neopelex, and its mass concentration is 0.1%; Complexing agent is EDTA tetra-sodium, and its mass concentration is 2.0%; The mass concentration of sodium chloride is 10%; The mass concentration of ethanol is 2.0%; Aqueous solvent for preparing detergent is selected from counter-infiltration system and produces water.
Before cleaning, first the membrane component polluted by polyacrylamide is soaked 24h in alkaline detergent.After immersion, first use acid detergent to carry out the flushing of low pressure high flow rate to film, re-use alkaline detergent afterwards and carry out the flushing of low pressure high flow rate to membrane component, concrete cleaning performs according to correlated process in the product technology handbook of membrane component.After continuous wash, 25 DEG C, intake pressure 1.5MPa, under sodium chloride content is the standard conditions of 2000ppm in former water, performance test is carried out to the membrane component after cleaning, test result is, flow of inlet water 10t/h, dense water pressure 1.4MPa, produce water 1.45t/h, produce water salt content 13mg/L.Test result shows, the polyacrylamide pollutant on reverse osmosis membrane obtains to be removed effectively, and the flux recovery of membrane component is to new membrane component 97%.
Embodiment 3
Select eastern beautiful reverse-osmosis membrane element TML20-370 as experiment film, be under the condition of 25 DEG C in water temperature, use the aqueous solution that pure water prepares calcium chloride, concentration of sodium carbonate is 10ppm, in this solution, add sodium chloride, make the total salinity of solution be 2000mg/L.Use this solution as former water, in former water, add PAMA (molecular weight 1,200 ten thousand, calm and peaceful water treatment Co., Ltd), concentration is 10mg/L, run after 2 hours, intake pressure 1.5MPa, flow of inlet water becomes 7.4t/h, dense water pressure 0.9MPa, produce water 0.53t/h, producing water salt content is 45mg/L, and Parameters variation illustrates that film is contaminated, wherein salt rejection rate has a little decline, and permeant flux declines 65%.
Get the above-mentioned membrane component by polyacrylamide pollution and carry out cleaning operation.
The film detergent formulations used is:
Acid detergent: containing acid, reducing agent, bactericide, Yan Heshui in such detergent; Detergent contains the nitric acid that mass fraction is 0.5%, uses hydrochloric acid that pH value is adjusted to 2; Reducing agent is sodium hydrogensulfite, its mass concentration is 0.05%; For preventing microorganism growth and breeding on membrane component, add non oxidizing bactericide in a medicament, 200ppm OIT; The mass concentration of sodium chloride is 5%; Aqueous solvent for preparing detergent is selected from counter-infiltration system and produces water.
Alkaline detergent: containing alkali, surfactant, complexing agent, salt, alcohol and water in such detergent; Alkali in detergent is NaOH, uses NaOH adjust ph to be 12; Surfactant is neopelex, and its mass concentration is 0.2%; Complexing agent is EDTA tetra-sodium, and its mass concentration is 0.1%; The mass concentration of sodium chloride is 1%; The mass concentration of ethanol is 0.1%; Aqueous solvent for preparing detergent is selected from counter-infiltration system and produces water.
Before cleaning, first the membrane component polluted by polyacrylamide is soaked 24h in alkaline detergent.After immersion, first use acid detergent to carry out the flushing of low pressure high flow rate to film, re-use alkaline detergent afterwards and carry out the flushing of low pressure high flow rate to membrane component, concrete cleaning performs according to correlated process in the product technology handbook of membrane component.After continuous wash, 25 DEG C, intake pressure 1.5MPa, under sodium chloride content is the standard conditions of 2000ppm in former water, performance test is carried out to the membrane component after cleaning, test result is, flow of inlet water 10t/h, dense water pressure 1.4MPa, produce water 1.44t/h, produce water salt content 19mg/L.Test result shows, the polyacrylamide pollutant on reverse osmosis membrane obtains to be removed effectively, and the flux recovery of membrane component is to new membrane component 96%.
Claims (7)
1., for cleaning a film detergent for reverse osmosis membrane, it is characterized in that this film detergent is divided into acid detergent or alkaline detergent, described acid detergent comprises acid, reducing agent, bactericide, Yan Heshui; Described alkaline detergent comprises alkali, surfactant, complexing agent, salt, alcohol, ketone and water.
2. a kind of film detergent for cleaning reverse osmosis membrane as claimed in claim 1, is characterized in that,
Acid in described acid detergent is one or more in hydrochloric acid, oxalic acid, nitric acid, citric acid, hydrofluoric acid, and uses hydrochloric acid or salpeter solution that pH value is adjusted to 2-3;
Described reducing agent is sodium hydrogensulfite, and its mass concentration is 0.05-1.0%;
Described bactericide is non oxidizing bactericide;
Described salt is sodium chloride, sodium nitrate, potassium chloride or potassium nitrate, and mass concentration is 1-10%.
3. a kind of film detergent for cleaning reverse osmosis membrane as claimed in claim 2, is characterized in that described non oxidizing bactericide is the formalin of 10-300ppm OIT or 0.1%-1.5% mass concentration.
4. a kind of film detergent for cleaning reverse osmosis membrane as claimed in claim 1, is characterized in that,
Alkali in described alkaline detergent is the mixture of NaOH or NaOH and sodium carbonate, uses NaOH adjust ph to be 10-12;
Described surfactant is neopelex, and its mass concentration is 0.1-0.2%;
Described complexing agent is sodium phosphate trimer, tetrasodium ethylenediamine tetraacetate (EDTA tetra-sodium) or diethylenetriamine pentacarboxylic acid five sodium (DTPA five sodium), and its mass concentration is 0.1-2.0%;
Described salt is sodium chloride, sodium nitrate, potassium chloride or potassium nitrate, and mass concentration is 1-10%;
Described alcohol, ketone can be one or more in acetone, ethanol, ethylene glycol, butanols, and the total mass concentration of contained alcohol, ketone is 0.1-2.0%.
5. a kind of film detergent for cleaning reverse osmosis membrane as described in as arbitrary in claim 1-4, the aqueous solvent that it is characterized in that for preparing detergent is selected from counter-infiltration system and produces water, distilled water or industrial fresh water.
6. the using method of a film detergent according to claim 1, it is characterized in that acid and alkaline membrane detergent can be used alone also can be used alternatingly, when two class medicaments are used alternatingly, if major pollutants are inorganic matters, cleaning order can be first use acid detergent to re-use alkaline detergent, if major pollutants are organic matters, then can alkaline detergent be first used to re-use acid detergent.
7. a using method for film detergent according to claim 1, is characterized in that using in this detergent process, meet and be had sufficient pure water to supply by the product water side of the anti-seepage membrane cleaned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510182517.1A CN104741006A (en) | 2015-04-17 | 2015-04-17 | Reverse osmosis membrane detergent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510182517.1A CN104741006A (en) | 2015-04-17 | 2015-04-17 | Reverse osmosis membrane detergent |
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| CN104741006A true CN104741006A (en) | 2015-07-01 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441197A (en) * | 2015-12-29 | 2016-03-30 | 威海翔宇环保科技股份有限公司 | Cleaning agent applicable to offline washing of reverse osmosis membrane system and preparation method of cleaning agent |
| CN105561794A (en) * | 2015-08-13 | 2016-05-11 | 常州联江环保科技有限公司 | Method applicable to cleaning ultra-filtration membranes or reverse osmosis membranes |
| CN105709605A (en) * | 2015-08-13 | 2016-06-29 | 常州联江环保科技有限公司 | Alkaline cleaning agent and bactericide applicable to ultra-filtration membranes or reverse osmosis membranes |
| CN107149878A (en) * | 2016-03-02 | 2017-09-12 | 上海丰信环保科技有限公司 | Treated sewage reusing film acidic cleaner |
| CN107261853A (en) * | 2017-08-20 | 2017-10-20 | 合肥信达膜科技有限公司 | A kind of cleaning method of reverse osmosis membrane |
| CN107469630A (en) * | 2017-09-12 | 2017-12-15 | 山东天庆科技发展有限公司 | Reverse osmosis membrane alkaline cleaner and its application process |
| CN107754612A (en) * | 2016-08-16 | 2018-03-06 | 贵阳时代沃顿科技有限公司 | A kind of cleaning agent of reverse-osmosis membrane element cleaning to for concentrating tea and preparation method thereof |
| CN108993162A (en) * | 2018-08-15 | 2018-12-14 | 攀钢集团西昌钢钒有限公司 | A kind of cleaning method of Treatment of Industrial Water reverse osmosis unit |
| CN110408475A (en) * | 2019-07-23 | 2019-11-05 | 杭州上拓环境科技股份有限公司 | A kind of cleaning combination of the membranous system for the dirt containing polyacrylamide, preparation method and application |
| CN110860210A (en) * | 2019-10-22 | 2020-03-06 | 内蒙古常盛制药有限公司 | Reverse osmosis membrane alkaline cleaning agent and application thereof |
| CN110898675A (en) * | 2019-12-09 | 2020-03-24 | 吉林省电力科学研究院有限公司 | Calcium sulfate scale cleaning agent for reverse osmosis membrane and cleaning method |
| CN113578060A (en) * | 2021-07-01 | 2021-11-02 | 武汉艾科滤膜技术有限公司 | Cleaning method for PAM and inorganic matter composite pollution ultrafiltration membrane |
-
2015
- 2015-04-17 CN CN201510182517.1A patent/CN104741006A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105561794A (en) * | 2015-08-13 | 2016-05-11 | 常州联江环保科技有限公司 | Method applicable to cleaning ultra-filtration membranes or reverse osmosis membranes |
| CN105709605A (en) * | 2015-08-13 | 2016-06-29 | 常州联江环保科技有限公司 | Alkaline cleaning agent and bactericide applicable to ultra-filtration membranes or reverse osmosis membranes |
| CN105441197A (en) * | 2015-12-29 | 2016-03-30 | 威海翔宇环保科技股份有限公司 | Cleaning agent applicable to offline washing of reverse osmosis membrane system and preparation method of cleaning agent |
| CN107149878A (en) * | 2016-03-02 | 2017-09-12 | 上海丰信环保科技有限公司 | Treated sewage reusing film acidic cleaner |
| CN107754612A (en) * | 2016-08-16 | 2018-03-06 | 贵阳时代沃顿科技有限公司 | A kind of cleaning agent of reverse-osmosis membrane element cleaning to for concentrating tea and preparation method thereof |
| CN107261853A (en) * | 2017-08-20 | 2017-10-20 | 合肥信达膜科技有限公司 | A kind of cleaning method of reverse osmosis membrane |
| CN107469630A (en) * | 2017-09-12 | 2017-12-15 | 山东天庆科技发展有限公司 | Reverse osmosis membrane alkaline cleaner and its application process |
| CN108993162A (en) * | 2018-08-15 | 2018-12-14 | 攀钢集团西昌钢钒有限公司 | A kind of cleaning method of Treatment of Industrial Water reverse osmosis unit |
| CN110408475A (en) * | 2019-07-23 | 2019-11-05 | 杭州上拓环境科技股份有限公司 | A kind of cleaning combination of the membranous system for the dirt containing polyacrylamide, preparation method and application |
| CN110860210A (en) * | 2019-10-22 | 2020-03-06 | 内蒙古常盛制药有限公司 | Reverse osmosis membrane alkaline cleaning agent and application thereof |
| CN110898675A (en) * | 2019-12-09 | 2020-03-24 | 吉林省电力科学研究院有限公司 | Calcium sulfate scale cleaning agent for reverse osmosis membrane and cleaning method |
| CN113578060A (en) * | 2021-07-01 | 2021-11-02 | 武汉艾科滤膜技术有限公司 | Cleaning method for PAM and inorganic matter composite pollution ultrafiltration membrane |
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Application publication date: 20150701 |