CN117643798A - Reverse osmosis membrane cleaning method for protein and polysaccharide organic matter blockage - Google Patents
Reverse osmosis membrane cleaning method for protein and polysaccharide organic matter blockage Download PDFInfo
- Publication number
- CN117643798A CN117643798A CN202311636931.6A CN202311636931A CN117643798A CN 117643798 A CN117643798 A CN 117643798A CN 202311636931 A CN202311636931 A CN 202311636931A CN 117643798 A CN117643798 A CN 117643798A
- Authority
- CN
- China
- Prior art keywords
- cleaning
- reverse osmosis
- osmosis membrane
- soaking
- hours
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 87
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 39
- 239000012528 membrane Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 19
- 150000004676 glycans Chemical class 0.000 title claims abstract description 14
- 229920001282 polysaccharide Polymers 0.000 title claims abstract description 14
- 239000005017 polysaccharide Substances 0.000 title claims abstract description 14
- 102000004169 proteins and genes Human genes 0.000 title claims abstract description 14
- 108090000623 proteins and genes Proteins 0.000 title claims abstract description 14
- 239000005416 organic matter Substances 0.000 title claims abstract description 7
- 238000002791 soaking Methods 0.000 claims abstract description 34
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000243 solution Substances 0.000 claims abstract description 10
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011259 mixed solution Substances 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 5
- 239000004202 carbamide Substances 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 239000001509 sodium citrate Substances 0.000 claims abstract description 5
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims abstract description 5
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 11
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 4
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002253 acid Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 241000195493 Cryptophyta Species 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
A reverse osmosis membrane cleaning method for protein and polysaccharide organic matter blockage comprises the following steps: circulating and cleaning a reverse osmosis membrane for 1 hour and soaking for 2-3 hours alternately by using a mixed solution containing 2-5% by mass of citric acid and 0.5-1% by mass of sulfamic acid, wherein the pH value is 1.5-2.5, and the total time of the circulating and soaking is 3-8 hours; step two, circularly cleaning the reverse osmosis membrane for 1 hour by using mixed solution containing 2 to 8 mass percent of urea and 0.5 to 1 mass percent of anionic surfactant, and alternately soaking for 3 to 4 hours, and circularly cleaning and soaking for 6 to 10 hours; preparing a mixed cleaning solution of 0.5-2% of sodium tripolyphosphate and 1-3% of sodium citrate by mass percent, regulating the pH value to be between 11.5 and 12.5 by using an alkaline substance, and circularly cleaning and soaking the reverse osmosis membrane for 1 hour and 2-4 hours alternately; and step four, repeating the step one. The method effectively solves the problem of reduced water production flux caused by pollution of protein and polysaccharide organic matters on the reverse osmosis membrane surface, and has obvious effect.
Description
Technical Field
The invention relates to a cleaning method for a reverse osmosis membrane with reduced water production flux per unit membrane area caused by fouling of the reverse osmosis membrane, in particular to a cleaning method for a reverse osmosis membrane with fouling of protein and polysaccharide organic matters.
Background
Reverse osmosis systems have been widely used in the fields of pure water preparation of power plant water, reuse of some reclaimed water, and the like. In the process of preparing power plant chemical water by using reservoir water with poor water quality as raw water, in the algae outbreak period of 4-10 months per year, the water yield of the reverse osmosis membrane is fast reduced due to the deposition of some algae secretions rich in proteins and polysaccharides dissolved in water and cell dissolved matters after killing algae on the surface of the reverse osmosis membrane, and the normal water yield of the reverse osmosis system is difficult to recover due to some conventional cleaning formulas and cleaning processes. This phenomenon also exists in some reclaimed water recycling systems that use the effluent from the biochemical pond as raw water.
Disclosure of Invention
The invention provides a reverse osmosis membrane cleaning method for protein and polysaccharide organic matter blocking, which is used for recovering the produced water flux of a polluted reverse osmosis membrane element.
The invention provides a reverse osmosis membrane cleaning method for protein and polysaccharide organic matter blockage, which comprises the following cleaning steps:
step one: circulating and cleaning a reverse osmosis membrane for 1 hour and soaking for 2-3 hours alternately by using a mixed solution containing 2-5% by mass of citric acid and 0.5-1% by mass of sulfamic acid, wherein the pH value is 1.5-2.5, and the circulating and soaking are carried out for 3-8 hours, and then emptying and cleaning liquid and washing cleanly;
step two, circularly cleaning the reverse osmosis membrane for 1 hour by using mixed solution containing 2 to 8 mass percent of urea and 0.5 to 1 mass percent of anionic surfactant, and alternately soaking for 3 to 4 hours, circularly cleaning and soaking for 6 to 10 hours, evacuating cleaning liquid, and washing cleanly;
preparing a mixed cleaning solution of a mixture of sodium tripolyphosphate with the mass percentage of 0.5-2% and sodium citrate with the mass percentage of 1-3%, regulating the pH value to be between 11.5-12.5 by using alkaline substances, circularly cleaning and soaking the reverse osmosis membrane for 1 hour and 2-4 hours alternately, and emptying the cleaning liquid and washing the reverse osmosis membrane cleanly by using clear water after the circular cleaning and soaking are finished;
and step four, repeating the step one.
Preferably, the anionic surfactant in step two is sodium dodecyl benzene sulfonate. .
Preferably, the alkaline substance is sodium hydroxide.
Preferably, the cycle cleaning soaking time in the third step is not less than 16 hours.
The method effectively solves the problem of reduced water production flux caused by pollution of protein and polysaccharide organic matters on the reverse osmosis membrane surface, and has obvious effect.
Description of the embodiments
The technical scheme of the invention is further specifically described by the following examples.
Example 1
The reverse osmosis membrane system for cleaning the sewage blockage by protein and polysaccharide organic matters on line comprises the following cleaning steps:
1. deionized water is added into a cleaning box, and a mixed acid cleaning solution of citric acid and sulfamic acid is prepared. The citric acid is prepared according to 2 percent of the total weight of the cleaning liquid required by the cleaning box, the cleaning pipeline and the reverse osmosis membrane component, and the sulfamic acid is prepared according to 1 percent of the total weight. The pH was 1.5. And circularly cleaning for 1 hour, soaking for 3 hours, repeating for 8 hours, discharging cleaning liquid, flushing the cleaning system, and performing the next cleaning step.
2. Preparing 2% of urea and 0.5% of sodium dodecyl benzene sulfonate mixed solution, circularly cleaning a reverse osmosis membrane for 1 hour and alternately soaking for 3 hours, circularly cleaning and soaking for 8 hours, emptying cleaning liquid, and washing cleanly;
3. preparing a mixed cleaning solution of sodium tripolyphosphate with the mass percent of 0.5% and sodium citrate with the mass percent of 3%, regulating the pH value to 12.5 by sodium hydroxide, circularly cleaning and soaking a reverse osmosis membrane for 1 hour and 4 hours alternately, repeatedly circularly cleaning and soaking, circularly cycling for 4 hours altogether, soaking for 12 hours, evacuating cleaning liquid, and washing cleanly by clean water;
4. a mixed acid pickling solution of 2% citric acid and 0.5% sulfamic acid was prepared. And (3) circularly cleaning for 1 hour, soaking for 2 hours, repeating for one time, discharging cleaning liquid after 6 hours, flushing the cleaning system, and carrying out operation.
Comparing operation data before and after cleaning of the same RO device after the cleaning process
From the comparison of the operation data before and after the cleaning, the water yield of the reverse osmosis system cleaned by the method is recovered to be normal.
Example two
1. Deionized water is added into a cleaning box, and a mixed acid cleaning solution of citric acid and sulfamic acid is prepared. The citric acid is prepared according to 5 percent of the total weight of the cleaning solution needed by the cleaning box, the cleaning pipeline and the reverse osmosis membrane component, and the sulfamic acid is prepared according to 0.5 percent of the total weight. The pH was 2.5. And circularly cleaning for 1 hour, soaking for 2 hours, repeating for 3 hours, discharging cleaning liquid, flushing the cleaning system, and performing the next cleaning step.
2. Preparing 8% of urea, circularly cleaning a reverse osmosis membrane for 1 hour by using 1% of sodium dodecyl benzene sulfonate mixed solution, soaking for 4 hours alternately, circularly cleaning and soaking for 10 hours altogether, emptying the cleaning liquid, and washing cleanly;
3. preparing a mixed cleaning solution of sodium tripolyphosphate with the mass percentage of 2% and sodium citrate with the mass percentage of 1%, regulating the pH value to 11.5 by sodium hydroxide, circularly cleaning and soaking a reverse osmosis membrane for 1 hour and 3-5 hours alternately, repeatedly circularly cleaning and soaking, circularly cleaning for 4 times, soaking for 3 times, 16 hours in total, evacuating cleaning liquid, and washing cleanly by clean water;
4. a mixed acid washing solution of 2% citric acid and 1% sulfamic acid was prepared. And (3) circularly cleaning for 1 hour, soaking for 2 hours, repeating for one time, discharging cleaning liquid after 6 hours, flushing the cleaning system, and carrying out operation.
Comparing operation data before and after cleaning of the same RO device after the cleaning process
The above embodiment shows that the reverse osmosis system cleaned by the method has normal water yield, prolonged cycle cleaning and soaking time, and relatively more obvious effect.
The above embodiments are merely examples of the present invention, but the present invention is not limited thereto, and any changes or modifications made by those skilled in the art are included in the scope of the present invention.
Claims (4)
1. A reverse osmosis membrane cleaning method for protein and polysaccharide organic matter blockage is characterized by comprising the following cleaning steps:
step one: circulating and cleaning a reverse osmosis membrane for 1 hour and soaking for 2-3 hours alternately by using a mixed solution containing 2-5% by mass of citric acid and 0.5-1% by mass of sulfamic acid, wherein the pH value is 1.5-2.5, and the circulating and soaking are carried out for 3-8 hours, and then emptying and cleaning liquid and washing cleanly;
step two, circularly cleaning the reverse osmosis membrane for 1 hour by using mixed solution containing 2 to 8 mass percent of urea and 0.5 to 1 mass percent of anionic surfactant, and alternately soaking for 3 to 4 hours, circularly cleaning and soaking for 6 to 10 hours, evacuating cleaning liquid, and washing cleanly;
preparing a mixed cleaning solution of 0.5-2% of sodium tripolyphosphate and 1-3% of sodium citrate by mass percent, regulating the pH value to 11.5-12.5 by using an alkaline substance, circularly cleaning and soaking the reverse osmosis membrane for 1 hour and 2-4 hours alternately, and emptying the cleaning liquid and washing the reverse osmosis membrane cleanly by using clear water after the circular cleaning and soaking are finished;
and step four, repeating the step one.
2. The method for cleaning a reverse osmosis membrane blocked by protein and polysaccharide organic matters according to claim 1, wherein the anionic surfactant in the second step is sodium dodecyl benzene sulfonate.
3. The method for cleaning a reverse osmosis membrane for fouling by protein and polysaccharide organic matters according to claim 1, wherein the alkaline substance is sodium hydroxide.
4. The method for cleaning a reverse osmosis membrane of a protein and polysaccharide organic matter plug according to claim 1, wherein the cyclic cleaning soaking time in the third step is not less than 16 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311636931.6A CN117643798A (en) | 2023-12-01 | 2023-12-01 | Reverse osmosis membrane cleaning method for protein and polysaccharide organic matter blockage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311636931.6A CN117643798A (en) | 2023-12-01 | 2023-12-01 | Reverse osmosis membrane cleaning method for protein and polysaccharide organic matter blockage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117643798A true CN117643798A (en) | 2024-03-05 |
Family
ID=90049105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311636931.6A Pending CN117643798A (en) | 2023-12-01 | 2023-12-01 | Reverse osmosis membrane cleaning method for protein and polysaccharide organic matter blockage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117643798A (en) |
-
2023
- 2023-12-01 CN CN202311636931.6A patent/CN117643798A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102343217A (en) | Ultrafiltration membrane alkaline cleaner | |
| CN105688680B (en) | A kind of cleaning method of reverse-osmosis membrane element | |
| CN102059056B (en) | Nanofiltration reproduction method of waste reverse osmosis membrane element | |
| CN107261854B (en) | Method for cleaning membrane in leachate treatment process | |
| CN102133505A (en) | Enhanced cleaning method for reverse osmosis/nanofiltration membrane pollution | |
| CN106957089A (en) | A kind of twice-modified method of discarded reverse osmosis membrane available for treatment of dyeing wastewater | |
| CN111644070A (en) | Reverse osmosis membrane cleaning agent for reclaimed water reuse | |
| CN103977711A (en) | Compound cleaner for cleaning reverse osmosis membrane and preparation method of compound cleaner | |
| CN104741006A (en) | Reverse osmosis membrane detergent | |
| CN105214507A (en) | The cleaning method of reverse-osmosis membrane element | |
| CN111437728A (en) | Reverse osmosis special-purpose pickling cleaning agent and preparation method thereof | |
| CN105413475A (en) | Cleaning agent suitable for cleaning hollow fiber nanofiltration membranes and preparation method thereof | |
| CN111217425A (en) | Cleaning method of immersed ultrafiltration membrane | |
| CN109499378B (en) | Cleaning method for organic dirt blockage of hollow fiber ultrafiltration membrane | |
| CN109499382B (en) | Cleaning composition for reverse osmosis membrane and preparation method thereof | |
| CN108159885B (en) | PVDF ultrafiltration membrane inorganic pollution cleaning agent and cleaning method | |
| CN117643798A (en) | Reverse osmosis membrane cleaning method for protein and polysaccharide organic matter blockage | |
| CN111440679A (en) | Cleaning agent for cleaning high sulfate scale and preparation method and application thereof | |
| CN110215846A (en) | A kind of cleaning agent and cleaning method handling reverse osmosis concentrated water plate nanofiltration membrane | |
| CN102145258A (en) | Method for cleaning heavy oil sludge-polluted membrane module | |
| CN108854560A (en) | A kind of RO cleaning agents of membrane | |
| CN109289538B (en) | Method for on-line chemical cleaning of reverse osmosis membrane | |
| CN112999882A (en) | High-efficiency acidic cleaning agent for landfill leachate pollutants and application thereof | |
| CN110408475A (en) | A kind of cleaning combination of the membranous system for the dirt containing polyacrylamide, preparation method and application | |
| CN113244776B (en) | Silicon scale cleaning agent and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |