CN108217841B - Reverse osmosis water treatment system cleaning method - Google Patents
Reverse osmosis water treatment system cleaning method Download PDFInfo
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- CN108217841B CN108217841B CN201711261574.4A CN201711261574A CN108217841B CN 108217841 B CN108217841 B CN 108217841B CN 201711261574 A CN201711261574 A CN 201711261574A CN 108217841 B CN108217841 B CN 108217841B
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- reverse osmosis
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- water treatment
- membrane
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- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000004140 cleaning Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000012528 membrane Substances 0.000 claims abstract description 71
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 60
- 241000108664 Nitrobacteria Species 0.000 claims abstract description 30
- 238000002791 soaking Methods 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 238000005406 washing Methods 0.000 claims abstract description 17
- 239000002351 wastewater Substances 0.000 claims abstract description 17
- 238000005188 flotation Methods 0.000 claims abstract description 9
- 150000004972 metal peroxides Chemical class 0.000 claims abstract description 9
- 239000012670 alkaline solution Substances 0.000 claims abstract description 8
- 239000003814 drug Substances 0.000 claims description 9
- 229940079593 drug Drugs 0.000 claims description 6
- XXQBEVHPUKOQEO-UHFFFAOYSA-N potassium superoxide Chemical compound [K+].[K+].[O-][O-] XXQBEVHPUKOQEO-UHFFFAOYSA-N 0.000 claims description 6
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 claims description 5
- 238000000909 electrodialysis Methods 0.000 claims description 4
- 238000005374 membrane filtration Methods 0.000 claims description 4
- 239000012982 microporous membrane Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 238000011010 flushing procedure Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 239000012535 impurity Substances 0.000 description 11
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 6
- 235000011121 sodium hydroxide Nutrition 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000001546 nitrifying effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 150000002828 nitro derivatives Chemical class 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 125000001297 nitrogen containing inorganic group Chemical group 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4698—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electro-osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a reverse osmosis water treatment system cleaning method, which comprises the following steps: 1) washing the wastewater in the reverse osmosis water treatment system; 2) adding metal peroxide into water to prepare a hot alkaline solution, soaking an ultrafiltration membrane and a primary reverse osmosis membrane of a reverse osmosis water treatment system in the hot alkaline solution, carrying out soaking cleaning and air flotation cleaning on nitrobacteria adhered to the ultrafiltration membrane and the primary reverse osmosis membrane, and taking out the ultrafiltration membrane and the primary reverse osmosis membrane for later use; 3) placing the ultrafiltration membrane and the first-stage reverse osmosis membrane to be used in the step 2) in high-speed air for air rapid separation; 4) and (3) flushing the ultrafiltration membrane and the first-stage reverse osmosis membrane subjected to the rapid air separation in the step 3) with clear water so as to clean the separated nitrobacteria. The cleaning method of the invention realizes the effect that the production requirement can be met by cleaning the ultrafiltration and reverse osmosis system once every 2 to 3 months.
Description
Technical Field
The invention relates to the field of wastewater treated by a nitro compound fertilizer device, in particular to a cleaning method of a reverse osmosis water treatment system.
Background
In the reverse osmosis technology, the membrane pore diameter of the reverse osmosis membrane is very small (only about 10A), so that dissolved salts, colloids, microorganisms, organic matters and the like in water can be effectively removed (the removal rate is as high as 97-98%). Reverse osmosis is a desalination technology which is most widely applied in high-purity water equipment at present, and the separation object of the reverse osmosis is an organic matter with the ion range and the molecular weight of hundreds of in solution; reverse Osmosis (RO), Ultrafiltration (UF), microporous Membrane Filtration (MF) and Electrodialysis (EDI) technologies all belong to membrane separation technologies.
The ammonium nitrate wastewater treated by the nitro compound fertilizer device often contains some impurities, the impurities are easily adhered to a reverse osmosis system, the ultrafiltration and the first-level reverse osmosis membrane of the reverse osmosis system are blocked, the viscosity of the blocked substances is high, the effect is basically not achieved after the conventional acidic cleaning agent hydrochloric acid, nitric acid, sulfuric acid, alkaline cleaning agent caustic soda, sodium hypochlorite and other medicines are adopted for soaking and washing, even if the blocked substances are washed by water on the basis of medicine soaking and washing, the effect is still not obvious, the reverse osmosis system after treatment can only be maintained for 1-2 days and then returns to the blocked state again, and the medicine soaking and washing treatment needs 12-24 hours each time, so that the method is high in cost, time and labor are wasted, the treatment effect is not good, and the production efficiency of a factory is seriously affected. Therefore, it is necessary to research a new cleaning method for reverse osmosis water treatment system with good feasibility and treatment effect.
Disclosure of Invention
In view of the problems in the prior art, the present invention is directed to a method for cleaning a reverse osmosis water treatment system; the invention analyzes the characteristics of the ammonium nitrate wastewater treated by the nitro compound fertilizer device and discovers that: the reason why the clogging substance is difficult to be removed is that: the nitrifying bacteria in the ammonium nitrate wastewater can adhere to the ultrafiltration and first-stage reverse osmosis membrane when passing through the ultrafiltration and first-stage reverse osmosis membrane of the reverse osmosis water treatment system to block the ultrafiltration and first-stage reverse osmosis membrane, and on the basis, the method disclosed by the invention adopts the methods of cleaning, medicine soaking and washing, air rapid separation and clear water washing, so that the effect that the production requirement can be met by cleaning the ultrafiltration and reverse osmosis system once every 2-3 months is realized.
One of the purposes of the invention is to provide a method for cleaning a reverse osmosis water treatment system.
The invention also aims to provide the application of the reverse osmosis water treatment system cleaning method.
In order to realize the purpose, the invention discloses the following technical scheme:
firstly, the invention discloses a method for cleaning a reverse osmosis water treatment system, which comprises the following steps:
1) cleaning: the wastewater in the reverse osmosis water treatment system is cleaned, so that the wastewater in the system is prevented from influencing external drainage;
2) soaking and washing the medicines: adding metal peroxide into water to prepare a hot alkaline solution, soaking an ultrafiltration membrane and a primary reverse osmosis membrane of a reverse osmosis water treatment system in the hot alkaline solution, carrying out soaking cleaning and air flotation cleaning on nitrobacteria adhered to the ultrafiltration membrane and the primary reverse osmosis membrane, and taking out the ultrafiltration membrane and the primary reverse osmosis membrane for later use;
3) and (3) fast air separation: placing the ultrafiltration membrane and the first-stage reverse osmosis membrane to be used in the step 2) in high-speed air for air rapid separation so as to clean nitrobacteria and other impurities still adhered to the ultrafiltration membrane and the first-stage reverse osmosis membrane again;
4) washing: flushing the ultrafiltration and first-stage reverse osmosis membrane subjected to rapid air separation in the step 3) with clear water so as to clean the separated nitrobacteria, and thoroughly removing the nitrobacteria and other impurities adhered to the ultrafiltration and first-stage reverse osmosis membrane;
5) and (3) after repeating the steps 1) to 4) for 2-3 times, finishing the cleaning of the reverse osmosis water treatment system.
In the step 2), the metal peroxide comprises sodium peroxide and potassium peroxide.
In the step 2), the input amount of the metal peroxide is 80-120 g/L.
In the step 2), the time for soaking cleaning and air flotation cleaning is 2-3 h.
In step 3), the airflow speed of the high-speed air is as follows: 5-8 m/s.
In the step 3), the time for quickly separating the air is 0.5-1 h.
The invention further discloses application of the reverse osmosis water treatment system cleaning method in reverse osmosis, ultrafiltration, microporous membrane filtration and electrodialysis water treatment system cleaning.
It should be noted that, the present invention is mainly directed to an ultrafiltration and first-stage reverse osmosis membrane of a reverse osmosis water treatment system for treating ammonium nitrate wastewater, wherein ammonium nitrate is a strong acid and a weak base salt, so that ammonium nitrate wastewater is weakly acidic, and has a PH value of about 5, and nitrifying bacteria can easily survive in an acidic environment and can firmly adhere to the ultrafiltration and first-stage reverse osmosis membrane, and such bacteria can be propagated in a large amount just by using nitrogen-containing inorganic salts as nutrients, so that the ultrafiltration and first-stage reverse osmosis membrane are seriously blocked, and nitrifying bacteria can easily grow in a weakly alkaline environment, so that the environment (PH of about 6.5 to 8.2) of weak acid and weak base, which is easily nitrifying bacteria, must be destroyed to completely clean the ultrafiltration and first-stage reverse osmosis membrane of the reverse osmosis water treatment system, and the adhesion capability of the bacteria is reduced. The invention discovers through experiments that: the adhesion capability of nitrobacteria in alkaline and hot water environments can be greatly reduced, but the adhesion force of the nitrobacteria cannot be completely destroyed only by soaking in alkaline solution hot water, so that the nitrobacteria on ultrafiltration and primary reverse osmosis membranes are subjected to soaking cleaning and air flotation cleaning by the input of metal peroxide and by utilizing the characteristics that the metal peroxide reacts in water to generate alkaline products and gas and releases a large amount of heat, and the principle is as follows: after the sodium peroxide is added into water, sodium hydroxide which is an alkaline substance is generated through reaction, a large amount of oxygen and heat are released, and as a result, a strong alkaline hot solution is generated, cell walls of nitrobacteria are strongly damaged in the hot alkaline solution, the adhesion force of the nitrobacteria is greatly reduced, meanwhile, a large amount of generated oxygen floats upwards, the flow rate of liquid around the nitrobacteria is accelerated, the nitrobacteria are promoted to fall off from an ultrafiltration membrane and a first-stage reverse osmosis membrane, 90% of the nitrobacteria are cleaned through the one-step treatment, then, the rest nitrobacteria are separated through the impact of high-speed air of 5-8m/s, and finally, after the nitrobacteria are washed by clean water, other impurities of the nitrobacteria adhered to the ultrafiltration membrane and the first-stage reverse osmosis membrane are thoroughly removed; through the steps, the plug removal rate of the reverse osmosis water treatment system reaches more than 98%, and the reverse osmosis and ultrafiltration flux reaches the design flow, so that the production requirement is completely met.
Compared with the prior art, the invention has the following beneficial effects: the method of the invention has the advantages of thorough cleaning of the blockage in the reverse osmosis water treatment system, high cleaning efficiency and good cleaning effect, and can meet the production requirement by cleaning the ultrafiltration and reverse osmosis system once every 2-3 months.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As described in the background art, the existing cleaning method has the defects of long time consumption, incomplete cleaning, poor effect and the like, and in order to solve the problems, the invention provides a cleaning method of a reverse osmosis water treatment system, and the invention is further described by combining specific embodiments.
Example 1:
a method for cleaning a reverse osmosis water treatment system specifically comprises the following steps:
1) cleaning: the wastewater in the reverse osmosis water treatment system is cleaned, so that the wastewater in the system is prevented from influencing external drainage;
2) soaking and washing the medicines: slowly adding 4kg of sodium peroxide into 50L of water to prepare a hot sodium hydroxide solution, soaking the ultrafiltration and primary reverse osmosis membranes of a reverse osmosis water treatment system in the hot sodium hydroxide solution for 2 hours, carrying out soaking cleaning and air flotation cleaning on nitrobacteria adhered to the ultrafiltration and primary reverse osmosis membranes, and taking out the ultrafiltration and primary reverse osmosis membranes for later use;
3) and (3) fast air separation: placing the ultrafiltration and first-stage reverse osmosis membrane to be used in the step 2) in high-speed air of 8m/s for air rapid separation for 0.5h so as to clean the nitrobacteria and other impurities still adhered to the ultrafiltration and first-stage reverse osmosis membrane again;
4) washing: flushing the ultrafiltration and first-stage reverse osmosis membrane subjected to rapid air separation in the step 3) with clear water so as to clean the separated nitrobacteria, and thoroughly removing the nitrobacteria and other impurities adhered to the ultrafiltration and first-stage reverse osmosis membrane;
5) and (3) after repeating the steps 1) to 4) for 2 times, finishing the cleaning of the reverse osmosis water treatment system.
The removal rate of the blockage in the ultrafiltration and first-stage reverse osmosis membrane of the reverse osmosis water treatment system treated by the embodiment reaches 98 percent, and the normal service life is 64 days.
Example 2:
a method for cleaning a reverse osmosis water treatment system specifically comprises the following steps:
1) cleaning: the wastewater in the reverse osmosis water treatment system is cleaned, so that the wastewater in the system is prevented from influencing external drainage;
2) soaking and washing the medicines: slowly adding 6kg of potassium peroxide into 50L of water to prepare hot potassium hydroxide solution, soaking the ultrafiltration and primary reverse osmosis membranes of a reverse osmosis water treatment system in the hot potassium hydroxide solution for 3 hours, carrying out soaking cleaning and air flotation cleaning on nitrobacteria adhered to the ultrafiltration and primary reverse osmosis membranes, and taking out the ultrafiltration and primary reverse osmosis membranes for later use;
3) and (3) fast air separation: placing the ultrafiltration and primary reverse osmosis membrane to be used in the step 2) in high-speed air of 5m/s for air rapid separation for 1h so as to clean the nitrobacteria and other impurities still adhered to the ultrafiltration and primary reverse osmosis membrane again;
4) washing: flushing the ultrafiltration and first-stage reverse osmosis membrane subjected to rapid air separation in the step 3) with clear water so as to clean the separated nitrobacteria, and thoroughly removing the nitrobacteria and other impurities adhered to the ultrafiltration and first-stage reverse osmosis membrane;
5) and (3) repeating the steps 1) to 4) for 3 times to finish the cleaning of the reverse osmosis water treatment system.
The removal rate of the blockage in the ultrafiltration and first-stage reverse osmosis membrane of the reverse osmosis water treatment system treated by the embodiment reaches 99 percent, and the normal service life is 88 days.
Example 3:
a method for cleaning a reverse osmosis water treatment system specifically comprises the following steps:
1) cleaning: the wastewater in the reverse osmosis water treatment system is cleaned, so that the wastewater in the system is prevented from influencing external drainage;
2) soaking and washing the medicines: slowly adding 6kg of sodium peroxide into 50L of water to prepare a hot sodium hydroxide solution, soaking the ultrafiltration and primary reverse osmosis membranes of a reverse osmosis water treatment system in the hot sodium hydroxide solution for 3 hours, carrying out soaking cleaning and air flotation cleaning on nitrobacteria adhered to the ultrafiltration and primary reverse osmosis membranes, and taking out the ultrafiltration and primary reverse osmosis membranes for later use;
3) and (3) fast air separation: placing the ultrafiltration and first-stage reverse osmosis membrane to be used in the step 2) in high-speed air of 7m/s for air rapid separation for 40min so as to clean the nitrobacteria and other impurities still adhered to the ultrafiltration and first-stage reverse osmosis membrane again;
4) washing: flushing the ultrafiltration and first-stage reverse osmosis membrane subjected to rapid air separation in the step 3) with clear water so as to clean the separated nitrobacteria, and thoroughly removing the nitrobacteria and other impurities adhered to the ultrafiltration and first-stage reverse osmosis membrane;
5) and (3) after repeating the steps 1) to 4) for 2 times, finishing the cleaning of the reverse osmosis water treatment system.
The removal rate of the blockage in the ultrafiltration and first-stage reverse osmosis membrane of the reverse osmosis water treatment system treated by the embodiment reaches 98 percent, and the normal service life is 75 days.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (5)
1. A method for cleaning a reverse osmosis water treatment system is characterized by comprising the following steps: the method specifically comprises the following steps:
1) cleaning: the wastewater in the reverse osmosis water treatment system is cleaned, so that the wastewater in the system is prevented from influencing external drainage;
2) soaking and washing the medicines: adding metal peroxide into water to prepare a hot alkaline solution, soaking the ultrafiltration membrane and the primary reverse osmosis membrane of a reverse osmosis water treatment system in the hot alkaline solution, carrying out soaking cleaning and air flotation cleaning on nitrobacteria adhered to the ultrafiltration membrane and the primary reverse osmosis membrane, and taking out the ultrafiltration membrane and the primary reverse osmosis membrane for later use;
3) and (3) fast air separation: placing the ultrafiltration membrane and the primary reverse osmosis membrane to be used in the step 2) in high-speed air for air rapid separation;
4) washing: washing the ultrafiltration and the first-stage reverse osmosis membrane subjected to the air rapid separation in the step 3) by using clear water to finish the cleaning of the reverse osmosis water treatment system;
in the step 2), the metal peroxide comprises sodium peroxide and potassium peroxide;
in the step 2), the input amount of the metal peroxide is 80-120 g/L;
in the step 2), the time for soaking cleaning and air flotation cleaning is 2-3 h.
2. The method of cleaning a reverse osmosis water treatment system according to claim 1, wherein: in step 3), the airflow speed of the high-speed air is as follows: 5-8 m/s.
3. The method of cleaning a reverse osmosis water treatment system according to claim 1, wherein: in the step 3), the time for quickly separating the air is 0.5-1 h.
4. The method of cleaning a reverse osmosis water treatment system according to any one of claims 1-3, wherein: and (3) repeating the steps 1) to 4) for 2-3 times to finish the cleaning of the reverse osmosis water treatment system.
5. Use of the reverse osmosis water treatment system cleaning method according to any one of claims 1 to 3 in reverse osmosis, ultrafiltration, microporous membrane filtration and electrodialysis water treatment system cleaning.
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| CN201711261574.4A CN108217841B (en) | 2017-12-04 | 2017-12-04 | Reverse osmosis water treatment system cleaning method |
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| CN201711261574.4A CN108217841B (en) | 2017-12-04 | 2017-12-04 | Reverse osmosis water treatment system cleaning method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045708A (en) * | 1996-02-22 | 2000-04-04 | Eriksson; Jan-Olof | Method for controlling microorganisms |
| CN1816384A (en) * | 2003-07-04 | 2006-08-09 | 阿克佐诺贝尔股份有限公司 | Cleaning of filtration membranes with peroxides |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4740308A (en) * | 1984-04-26 | 1988-04-26 | Champion International Corporation | Membrane cleaning process |
| CN102210978B (en) * | 2011-03-14 | 2014-03-05 | 四川科伦药业股份有限公司 | Method and reagent for cleaning and repairing discarded reverse osmosis film in offline mode |
| CN103551044B (en) * | 2013-11-20 | 2015-07-22 | 哈尔滨理工大学 | Method for cleaning polluted membrane by using singlet oxygen produced from peroxymonosulfate under induction of inorganic solid peroxide |
| CN104548948A (en) * | 2014-12-24 | 2015-04-29 | 哈尔滨工业大学 | Cleaning technology suitable for processing oil recovery waste water polytetrafluoroethylene film |
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2017
- 2017-12-04 CN CN201711261574.4A patent/CN108217841B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045708A (en) * | 1996-02-22 | 2000-04-04 | Eriksson; Jan-Olof | Method for controlling microorganisms |
| CN1816384A (en) * | 2003-07-04 | 2006-08-09 | 阿克佐诺贝尔股份有限公司 | Cleaning of filtration membranes with peroxides |
Non-Patent Citations (2)
| Title |
|---|
| 关于造纸系统微生物问题的分析与控制(下);张新元;《工艺与技术》;20141231;第10-13页 * |
| 聚醚砜酮微孔分离膜在酱油除菌中的应用;田婧;《中国优秀硕士学位论文全文数据库（工程科技I辑）》;20080115;参见第1章 * |
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