CN107149879A - Clean the cleaning method of the reverse osmosis membrane polluted by polyacrylamide - Google Patents
Clean the cleaning method of the reverse osmosis membrane polluted by polyacrylamide Download PDFInfo
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- CN107149879A CN107149879A CN201610119395.6A CN201610119395A CN107149879A CN 107149879 A CN107149879 A CN 107149879A CN 201610119395 A CN201610119395 A CN 201610119395A CN 107149879 A CN107149879 A CN 107149879A
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- cleaning
- acid
- polyacrylamide
- reverse osmosis
- osmosis membrane
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- 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
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- 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
- B01D2321/164—Use of bases
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a kind of cleaning method for the reverse osmosis membrane for cleaning and being polluted by polyacrylamide, it is characterised in that including following cleaning step：Step 1: configuration alkaline cleaning fluid：After alkaline matter is well mixed, its pH is adjusted to more than 10 with weak lye；Step 2: the alkaline cleaning fluid that step one is configured is heated into more than 30 DEG C；Step 3: carrying out wash cycles to counter-infiltration system using the alkaline cleaning fluid of step 2；Step 4: using temperature to be rinsed for more than 30 DEG C of hot water to counter-infiltration system, until counter-infiltration system produces water and concentrated water reaches neutrality.The invention provides a kind of method that use speciality alkali lye and water alternately clean reverse osmosis membrane, this method is particularly suitable for use in the film body polluted for polyacrylamide, polyacrylamide clearance can be reached to more than 99% after being cleaned by above cleaning method and does not injure reverse osmosis membrane.
Description
Technical field
The present invention relates to the cleaning field of reverse osmosis membrane, in particular it relates to which a kind of cleaning is dirty by polyacrylamide
The cleaning method of the reverse osmosis membrane of dye.
Background technology
Reverse osmosis membrane is the core parts for realizing counter-infiltration, be it is a kind of simulate biological semi-permeable film be made have one
Determine the artificial pellicle of characteristic.Typically it is made of high polymer material.Such as cellulose acetate film, aromatic series polyamides
Hydrazine film, aromatic polyamide film.The diameter of surface micropore is general between 0.5~10nm, permeability it is big
The small chemical constitution with film in itself is relevant.Some high polymer materials are good to the repellency of salt, and passing through for water is fast
Spend and bad.Some high polymer material chemical structures have more hydrophilic radical, thus the penetration speed phase of water
To very fast.Therefore a kind of reverse osmosis membrane of satisfaction should have appropriate infiltration capacity or salt rejection rate.
Polyacrylamide is very common in the treatment of waste water as a kind of high polymer coagulant and flocculation aid.But
In wastewater membrane method reuse, be it is a kind of can cause the pollutant of reverse osmosis membrane severe contamination, and clean very
Difficulty, so, in traditional handicraft, when RO is that the dirt of such material is stifled, waste treatment is often selected, is made
Into the problem of substantial amounts of waste and cost increase.
The content of the invention
The present invention provides a kind of cleaning side for the reverse osmosis membrane that novel detergent cleaning is polluted by polyacrylamide
Method, this method can effectively clean the reverse osmosis membrane polluted by polyacrylamide, and to reverse osmosis membrane non-hazardous.
The invention provides a kind of cleaning method for the reverse osmosis membrane for cleaning and being polluted by polyacrylamide, its feature
It is, including following cleaning step：
Step 1: configuration alkaline cleaning fluid：After alkaline matter is well mixed, its pH is adjusted with weak lye
To more than 10；
Step 2: the alkaline cleaning fluid that step one is configured is heated into more than 30 DEG C；
Step 3: carrying out wash cycles to counter-infiltration system using the alkaline cleaning fluid of step 2；
Step 4: using temperature to be rinsed for more than 30 DEG C of hot water to counter-infiltration system, until counter-infiltration
System produces water and concentrated water reaches neutrality.
Further, the cleaning method for the reverse osmosis membrane that cleaning of the invention is polluted by polyacrylamide, also has
The characteristics of having such：I.e., above-mentioned alkaline matter is in metal hydroxides, metal salt and metallo-chelate
One or more of mixtures.
Further, the cleaning method for the reverse osmosis membrane that cleaning of the invention is polluted by polyacrylamide, also has
The characteristics of having such：I.e., the mass concentration of above-mentioned alkaline matter is 0.05-1%.
Further, the cleaning method for the reverse osmosis membrane that cleaning of the invention is polluted by polyacrylamide, also has
The characteristics of having such：I.e., the one kind or several of above-mentioned metal hydroxides in sodium hydroxide, potassium hydroxide
The mixture planted.
Further, the cleaning method for the reverse osmosis membrane that cleaning of the invention is polluted by polyacrylamide, also has
The characteristics of having such：I.e., above-mentioned metal salt is selected from sodium carbonate, sodium acid carbonate, sodium oxalate, potassium carbonate, carbon
One or more of mixtures in potassium hydrogen phthalate, potassium oxalate.
Further, the cleaning method for the reverse osmosis membrane that cleaning of the invention is polluted by polyacrylamide, also has
The characteristics of having such：I.e., above-mentioned metal-chelator be selected from ethylenediamine tetra-acetic acid and its salt, aminotriacetic acid and
Its salt, diethylene-triamine pentaacetic acid and its salt, citric acid and its salt, tartaric acid and its salt, gluconic acid
And its salt, hydroxyethylethylene diamine tri-acetic acid and its salt, bicine N- and its salt, 1,2,3,4- tetra-
Carboxyl pentamethylene and its salt, 2-fluoroacetic acid propylmalonic acid and its salt, 2-fluoroacetic acid base fourth lead acid and its salt,
One kind in polyacrylic acid, polymethylacrylic acid, HPMA, fumaric acid-propene sulfonic acid EVA
Or several mixtures.
Further, the cleaning method for the reverse osmosis membrane that cleaning of the invention is polluted by polyacrylamide, also has
The characteristics of having such：I.e., above-mentioned alkaline matter is selected from sodium hydroxide, sodium carbonate, ethanedioic acid tetraacethyl disodium
Mixture；
The mass ratio of above-mentioned sodium hydroxide, sodium carbonate and ethanedioic acid tetraacethyl disodium is 0.5-1:1-5：1-5.
Further, the cleaning method for the reverse osmosis membrane that cleaning of the invention is polluted by polyacrylamide, also has
The characteristics of having such：I.e., above-mentioned weak lye is selected from ammoniacal liquor.
Further, the cleaning method for the reverse osmosis membrane that cleaning of the invention is polluted by polyacrylamide, also has
The characteristics of having such：I.e., in above-mentioned steps one, pH value is not more than 11.5；
In above-mentioned steps two, heating-up temperature is no more than 35 DEG C；
In above-mentioned steps three, the time of wash cycles is 1-3 hours；
In above-mentioned steps four, the temperature of hot water is not higher than 40 DEG C.
Further, the cleaning method for the reverse osmosis membrane that cleaning of the invention is polluted by polyacrylamide, also has
The characteristics of having such：I.e., the process of the step of above-mentioned cleaning method is comprising the once above three and/or step 4.
The effect of the present invention and effect：
The invention provides a kind of method that use speciality alkali lye and water alternately clean reverse osmosis membrane, this method is outstanding
It is applied to the film body polluted for polyacrylamide, can be by polyacrylamide after being cleaned by above cleaning method
Clearance reaches more than 99% and does not injure reverse osmosis membrane.
The cleaning formulation provided in the method for the present invention, by the compounding and buffering effect of chelating agent and alkali lye,
Can effectively degradation of polypropylene acid amides formation flock material, so as to realize the effect of cleaning.
In the method for the invention, it is contemplated that film non-refractory, and the cleaning temperature of caustic dip agent is higher,
The cleaning performance of the cleaning agent is better, so it has been investigated that during using 30-35 DEG C, reverse osmosis membrane can be protected
While being not damaged by, moreover it is possible to effective this pollutant of removal polyacrylamide.
In the method for the invention, it is the stage cleaned using hot water, right due to without medicament when the stage rinses
The infringement of reverse osmosis membrane is relatively small, so, in this step, the temperature of flushing can be properly increased, but
No more than 40 DEG C.
Embodiment
Embodiment one, cleaning method 1#
Step 1: configuration naoh concentration is that 0.5 ‰, concentration of sodium carbonate is 1 ‰, ethanedioic acid tetraacethyl
Two na concns are 1 ‰ cleaning fluid, then are adjusted its PH to 11-11.5 with ammoniacal liquor；
2nd, cleaning fluid is heated to 30-35 DEG C；
3rd, to counter-infiltration system wash cycles 2 hours；
4th, system is rinsed with the hot water that temperature is 35-40 DEG C, until system produces water and concentrated water reaches
To neutrality；
If the 5, cleaning performance is unsatisfied with, system once can be cleaned again.
Embodiment two, cleaning method 2#
Step 1: configuration naoh concentration is that 1 ‰, concentration of sodium carbonate is 5 ‰, ethanedioic acid tetraacethyl two
Na concn is 5 ‰ cleaning fluid, then is adjusted its PH to 11-11.5 with ammoniacal liquor；
2nd, cleaning fluid is heated to 30-35 DEG C；
3rd, to counter-infiltration system wash cycles 2 hours；
4th, system is rinsed with the hot water that temperature is 35-40 DEG C, until system produces water and concentrated water reaches
To neutrality；
If the 5, cleaning performance is unsatisfied with, system once can be cleaned again.
Embodiment three, cleaning method 3#
Step 1: configuration concentration of potassium hydroxide is that 5 ‰, saleratus concentration is 10 ‰, ethylenediamine tetra-acetic acid
Two na concns are 10 ‰ cleaning fluid, then are adjusted its PH to 11-11.5 with ammoniacal liquor；
2nd, cleaning fluid is heated to 30-35 DEG C；
3rd, to counter-infiltration system wash cycles 2 hours；
4th, system is rinsed with the hot water that temperature is 35-40 DEG C, until system produces water and concentrated water reaches
To neutrality；
If the 5, cleaning performance is unsatisfied with, system once can be cleaned again.
Example IV, cleaning method 4#
Step 1: configuration naoh concentration is that 4 ‰, concentration of sodium carbonate is 7 ‰, ethanedioic acid tetraacethyl two
Na concn is the cleaning fluid that 2 ‰, gluconic acid concentration is 1 ‰, then is adjusted its PH to 11-11.5 with ammoniacal liquor；
2nd, cleaning fluid is heated to 30-35 DEG C；
3rd, to counter-infiltration system wash cycles 1 hour；
4th, system is rinsed with the hot water that temperature is 35-40 DEG C, until system produces water and concentrated water reaches
To neutrality；
If the 5, cleaning performance is unsatisfied with, system once can be cleaned again.
Embodiment six, cleaning method 6#
Step 1: configuration concentration of sodium carbonate is that 4 ‰, sodium tartrate concentration is that 4 ‰, EDETATE SODIUM concentration is
2 ‰ cleaning fluid, then adjusted its PH to 11-11.5 with ammoniacal liquor；
2nd, cleaning fluid is heated to 30-35 DEG C；
3rd, to counter-infiltration system wash cycles 1-2 hours；
4th, system is rinsed with the hot water that temperature is 35-40 DEG C, until system produces water and concentrated water reaches
To neutrality；
If the 5, cleaning performance is unsatisfied with, system once can be cleaned again.
After being cleaned by above cleaning method, polyacrylamide clearance can be reached to more than 99% and not injure anti-
Permeable membrane.
Claims (10)
1. a kind of cleaning method for cleaning the reverse osmosis membrane polluted by polyacrylamide, it is characterised in that including as follows
Cleaning step：
Step 1: configuration alkaline cleaning fluid：After alkaline matter is well mixed, its pH is adjusted to 1 with weak lye
More than 0；
Step 2: the alkaline cleaning fluid that step one is configured is heated into more than 30 DEG C；
Step 3: carrying out wash cycles to counter-infiltration system using the alkaline cleaning fluid of step 2；
Step 4: using temperature to be rinsed for more than 30 DEG C of hot water to counter-infiltration system, until counter-infiltration system
Production water and concentrated water reach neutrality.
2. a kind of cleaning method for cleaning the reverse osmosis membrane polluted by polyacrylamide as claimed in claim 1, its
It is characterised by：
One or more of mixing of the alkaline matter in metal hydroxides, metal salt and metallo-chelate
Thing.
3. a kind of cleaning method for cleaning the reverse osmosis membrane polluted by polyacrylamide as claimed in claim 1, its
It is characterised by：
The mass concentration of the alkaline matter is 0.05-1%.
4. a kind of cleaning method for cleaning the reverse osmosis membrane polluted by polyacrylamide as claimed in claim 2, its
It is characterised by：
One or more of mixtures of the metal hydroxides in sodium hydroxide, potassium hydroxide.
5. a kind of cleaning method for cleaning the reverse osmosis membrane polluted by polyacrylamide as claimed in claim 2, its
It is characterised by：
The metal salt is in sodium carbonate, sodium acid carbonate, sodium oxalate, potassium carbonate, saleratus, potassium oxalate
One or more of mixtures.
6. a kind of cleaning method for cleaning the reverse osmosis membrane polluted by polyacrylamide as claimed in claim 2, its
It is characterised by：
The metal-chelator is selected from ethylenediamine tetra-acetic acid and its salt, aminotriacetic acid and its salt, diethylenetriamines
Pentaacetic acid and its salt, citric acid and its salt, tartaric acid and its salt, gluconic acid and its salt, ethoxy second two
Amine triacetic acid and its salt, bicine N- and its salt, 1,2,3,4- tetracarboxylic acid cyclopentane and its salt,
2-fluoroacetic acid propylmalonic acid and its salt, 2-fluoroacetic acid base fourth lead acid and its salt, polyacrylic acid, poly- methyl-prop
One or more of mixtures in olefin(e) acid, HPMA, fumaric acid-propene sulfonic acid EVA.
7. a kind of cleaning method for cleaning the reverse osmosis membrane polluted by polyacrylamide as claimed in claim 1, its
It is characterised by：
The alkaline matter is selected from sodium hydroxide, sodium carbonate, the mixture of ethanedioic acid tetraacethyl disodium；
The mass ratio of the sodium hydroxide, sodium carbonate and ethanedioic acid tetraacethyl disodium is 0.5-1:1-5：1-5.
8. a kind of cleaning method for cleaning the reverse osmosis membrane polluted by polyacrylamide as claimed in claim 1, its
It is characterised by：
The weak lye is selected from ammoniacal liquor.
9. the cleaning side for the reverse osmosis membrane that a kind of cleaning as described in claim 1 is any is polluted by polyacrylamide
Method, it is characterised in that：
In the step one, pH value is not more than 11.5；
In the step 2, heating-up temperature is no more than 35 DEG C；
In the step 3, the time of wash cycles is 1-3 hours；
In the step 4, the temperature of hot water is not higher than 40 DEG C.
10. the cleaning for the reverse osmosis membrane that a kind of cleaning as described in claim 1-9 is any is polluted by polyacrylamide
Method, it is characterised in that：
The process of the step of cleaning method is comprising the once above three and/or step 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610119395.6A CN107149879A (en) | 2016-03-02 | 2016-03-02 | Clean the cleaning method of the reverse osmosis membrane polluted by polyacrylamide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610119395.6A CN107149879A (en) | 2016-03-02 | 2016-03-02 | Clean the cleaning method of the reverse osmosis membrane polluted by polyacrylamide |
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| CN107149879A true CN107149879A (en) | 2017-09-12 |
Family
ID=59791342
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610119395.6A Pending CN107149879A (en) | 2016-03-02 | 2016-03-02 | Clean the cleaning method of the reverse osmosis membrane polluted by polyacrylamide |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354688A (en) * | 2019-06-14 | 2019-10-22 | 宁波大学 | A kind of cleaning agent and its cleaning method for polyacrylamide polluted membrane |
| 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 |
| CN113041845A (en) * | 2021-02-26 | 2021-06-29 | 浙江理工大学 | In-situ repair method for failed polyamide reverse osmosis membrane module |
| 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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| JPS53125979A (en) * | 1977-04-12 | 1978-11-02 | Teijin Ltd | Method of treating membrane |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110354688A (en) * | 2019-06-14 | 2019-10-22 | 宁波大学 | A kind of cleaning agent and its cleaning method for polyacrylamide polluted membrane |
| CN110354688B (en) * | 2019-06-14 | 2021-10-19 | 宁波大学 | Cleaning agent for polyacrylamide polluted membrane and cleaning method thereof |
| 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 |
| CN113041845A (en) * | 2021-02-26 | 2021-06-29 | 浙江理工大学 | In-situ repair method for failed polyamide reverse osmosis membrane module |
| CN113041845B (en) * | 2021-02-26 | 2022-06-21 | 浙江理工大学 | In-situ repair method for failed polyamide reverse osmosis membrane module |
| 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: 20170912 |