CN110981023A - Water treatment system and process for realizing continuous cleaning by utilizing pressure ozone - Google Patents
Water treatment system and process for realizing continuous cleaning by utilizing pressure ozone Download PDFInfo
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- CN110981023A CN110981023A CN201911355424.9A CN201911355424A CN110981023A CN 110981023 A CN110981023 A CN 110981023A CN 201911355424 A CN201911355424 A CN 201911355424A CN 110981023 A CN110981023 A CN 110981023A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 129
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title claims abstract description 19
- 238000004140 cleaning Methods 0.000 title claims abstract description 15
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 34
- 239000012528 membrane Substances 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 238000011045 prefiltration Methods 0.000 claims abstract description 19
- 239000002351 wastewater Substances 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims description 15
- 230000008676 import Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 241000894006 Bacteria Species 0.000 abstract description 4
- 241000195493 Cryptophyta Species 0.000 abstract description 4
- 238000003475 lamination Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000011001 backwashing Methods 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009295 crossflow filtration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/782—Ozone generators
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a water treatment system for realizing continuous cleaning by utilizing pressure ozone, which comprises a raw water pump, a mechanical grid prefilter, a booster pump, a venturi, an ozone generator, a laminated filter, an ozone reaction tank, an ozone microbubble generator, a wastewater discharge port, an ultrafiltration membrane component, a dosing device, a clean water tank and a clean water pump. The system and the process can kill algae and bacteria in raw water by utilizing pressure ozone reaction, can filter a large amount of organic matters by arranging the lamination, reduce the organic matters in the ozone reaction tank and improve the ozone reaction efficiency. And simultaneously, the Venturi and the ozone generator are arranged in front of the laminated filter, so that the laminated filter is cleaned by ozone, pollutants on the filter are effectively crushed, and the filter is more easily backwashed and is removed out of the filter holes.
Description
Technical Field
The invention relates to the field of water treatment equipment, in particular to a water treatment system for realizing continuous cleaning by utilizing pressure ozone and a process thereof.
Background
Due to water source pollution and national improvement of the water quality requirement of drinking water, the traditional water treatment process cannot meet the standard requirement. The advanced treatment process is the basic requirement of each water plant improvement. Ultrafiltration and reverse osmosis become mainstream processes for drinking water treatment.
At present, in the practice process of traditional water treatment equipment, the traditional water treatment equipment is found that the process of fine filtration is easily polluted by algae and bacteria, so that filter holes are blocked, and the water treatment efficiency is influenced. In addition, the traditional water treatment equipment needs to be artificially pre-ozonized before pretreatment, and the artificial pre-ozonation not only needs to purchase materials, but also needs to be realized by power equipment, thereby increasing the burden of enterprises invisibly.
Disclosure of Invention
The applicant carries out research and improvement aiming at the existing problems and provides a water treatment system and a process thereof for realizing continuous cleaning by utilizing pressure ozone, which can realize continuous online cleaning so as to ensure that filter holes are not blocked and greatly improve the water treatment efficiency.
The technical scheme adopted by the invention is as follows:
a water treatment system for realizing continuous cleaning by utilizing pressure ozone comprises a raw water pump, a mechanical grid prefilter, a booster pump, a Venturi, an ozone generator, a laminated filter, an ozone reaction tank, an ozone microbubble generator, a wastewater discharge port, an ultrafiltration membrane component, a dosing device, a clean water tank and a clean water pump; the import intercommunication of raw water pump grid prefilter, the export of machinery grid prefilter forms first branch pipe and second branch pipe, second branch union coupling booster pump and venturi back and first branch pipe gather and with the access connection of smart filtration equipment, the import of venturi passes through pipeline series connection ozone generator, the export of smart filtration equipment passes through the tube coupling ozone retort, the export of ozone retort passes through the tube coupling and the access connection of ozone microbubble generator, the exit linkage milipore filter subassembly of ozone microbubble generator, the delivery port of milipore filter subassembly passes through pipeline series connection clean water basin and clean water pump still establish ties charge device on the pipeline between milipore filter subassembly delivery port and the clean water basin, the part dense water that milipore filter subassembly was handled flows back through the third branch pipe and with the pipeline intercommunication of being connected the raw water pump import, the ultrafiltration membrane component is also communicated with a waste water discharge port through a pipeline.
The further technical scheme is as follows:
the ultrafiltration membrane component is also communicated with a wastewater discharge port through a pipeline;
the filtering range of the fine filtering equipment is 100-200 um;
the fine filtering equipment adopts a laminated filter or a ceramic filter;
as a further improvement of the above technical solution:
a process for water treatment of a water treatment system using pressurized ozone to achieve continuous cleaning comprises the following steps:
the first step is as follows: introducing raw water of rivers and lakes into a mechanical grid prefilter through a raw water pump to prefilter large particles;
the second step is that: pressurizing pre-filtered 10-20% of raw water, then feeding the pre-filtered raw water into a venturi, mixing ozone and the raw water to form mixed raw water, and collecting the pre-filtered 80% of raw water and the mixed raw water, and then feeding the mixed raw water into a fine filter for precision treatment;
the third step: the dissolved ozone and raw water enter an ozone reaction tank to carry out strong oxidation reaction;
the fourth step: ozone and raw water after the strong oxidation reaction enter an ozone microbubble generator to generate a plurality of bubbles;
the fifth step: a plurality of bubbles generated in the fourth step enter an ultrafiltration membrane component for microbubble reaction, and raw water enters the interior of an ultrafiltration membrane body for filtration and continuously ultrafilters effluent;
and a sixth step: after the water is ultrafiltered out by the ultrafiltration membrane component, chlorine is supplemented by the chemical adding device and enters the clean water tank, and the water is discharged by the clean water pump to realize water supply.
The invention has the following beneficial effects:
the system and the process have the advantages that the structure is simple, the use is convenient, the pressure ozone reaction can be utilized to kill algae and bacteria in raw water by utilizing the system and the process, a large amount of organic matters can be filtered by arranging the lamination, the organic matters in the ozone reaction tank are reduced, and the ozone reaction efficiency is improved. And simultaneously, the Venturi and the ozone generator are arranged in front of the laminated filter, so that the laminated filter is cleaned by ozone, pollutants on the filter are effectively crushed, and the filter is more easily backwashed and is removed out of the filter holes. In addition, the recycled concentrated water can provide 0.5-0.6 ppm of ozone, so that the traditional step of manually pre-ozonating can be replaced, water resources are saved, and the investment cost of enterprises is saved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein: 1. a raw water pump; 2. a mechanical grate prefilter; 3. a booster pump; 4. a venturi; 5. an ozone generator; 6. a lamination filter; 7. an ozone reaction tank; 8. an ozone microbubble generator; 9. a wastewater discharge port; 10. an ultrafiltration membrane module; 11. a dosing device; 12. a clean water tank; 13. a clean water pump; 141. a first branch pipe; 142. a second branch pipe; 143. and a third branch pipe.
Detailed Description
The following describes specific embodiments of the present invention.
As shown in fig. 1, a water treatment system and a process thereof for realizing continuous cleaning by using pressure ozone comprise a raw water pump 1, a mechanical grid prefilter 2, a booster pump 3, a venturi 4, an ozone generator 5, a laminated filter 6, an ozone reaction tank 7, an ozone microbubble generator 8, a wastewater discharge port 9, an ultrafiltration membrane assembly 10, a dosing device 11, a clean water tank 12 and a clean water pump 13; the inlet of the raw water pump 1 is communicated with external river and lake raw water through a pipeline, the outlet of the raw water pump 1 is communicated with the inlet of the mechanical grating prefilter 2 through a pipeline, and the filtering range of the mechanical grating prefilter 2 is 400-1000 um. The outlet of the mechanical grating prefilter 2 forms a first branch pipe 141 and a second branch pipe 142, the second branch pipe 142 is connected with the booster pump 3 and the venturi 4, then is gathered with the first branch pipe 141 and is connected with the inlet of the laminated filter 6 (which can be replaced by a ceramic filter), and the filtering range of the laminated filter 6 is 100 um-200 um. The inlet of the venturi 4 is connected with the ozone generator 5 in series through a pipeline, the outlet of the laminated filter 6 is connected with the ozone reaction tank 7 through a pipeline, the outlet of the ozone reaction tank 7 is connected with the inlet of the ozone microbubble generator 8 through a pipeline, the outlet of the ozone microbubble generator 8 is connected with the ultrafiltration membrane assembly 10, the water outlet of the ultrafiltration membrane assembly 10 is sequentially connected with the clean water tank 12 and the clean water pump 13 through pipelines, the pipeline between the water outlet of the ultrafiltration membrane assembly 10 and the clean water tank 12 is also connected with the dosing device 11 in series, and part of the concentrated water treated by the ultrafiltration membrane assembly 10 flows back through the third branch pipe 143 and is communicated with the pipeline connected with the inlet of the raw water. The ultrafiltration membrane component 10 is also communicated with a waste water discharge port 9 through a pipeline.
The process method for carrying out water treatment by using the water treatment system realizing continuous cleaning by using the pressure ozone comprises the following steps:
the first step is as follows: raw water of rivers and lakes is introduced into a mechanical grating prefilter 2 through a raw water pump 1 to prefilter large particles, and the mechanical grating prefilter 2 is used for separating solid and liquid in the raw water of the rivers and lakes and removing particles in the raw water through backwashing.
The second step is that: the method comprises the steps that pre-filtered 10% -20% raw water enters a Venturi 4 after being pressurized, ozone and the raw water are mixed to form mixed raw water, the pre-filtered 80% raw water and the mixed raw water are gathered and then enter a laminated filter 6 to be subjected to precision treatment, microbubbles generated by pressure ozone continuously clean the laminated filter 6 in the process, collapse and explosion effects of the ozone microbubbles generate shock waves of thousands of atmospheric pressure in a micron size, so that pollutants in laminated sheets (or ceramic membrane holes) are crushed, the pollutants are easier to be back-washed and removed out of a filter hole, the water production time of the laminated filter 6 between two times of back washing is greatly prolonged, and the working pressure drop of the laminated filter 6 is also greatly reduced.
The third step: the dissolved ozone and the raw water enter an ozone reaction tank 7 for strong oxidation reaction, and the strong oxidation reaction is used for treating organic pollutants, inorganic pollutants and heavy metals in the raw water.
The fourth step: ozone and raw water after the strong oxidation reaction enter an ozone microbubble generator 8 to generate a plurality of bubbles;
the fifth step: and (3) allowing a plurality of bubbles generated in the fourth step to enter the ultrafiltration membrane module to perform microbubble reaction, wherein the microbubbles are used for intercepting particles with the area of 0.1um, so that pollutants attached to the surface of the membrane body in the ultrafiltration membrane module are settled and discharged from the wastewater discharge port 9, and raw water enters the interior of the ultrafiltration membrane body to be filtered and continuously ultrafiltrates outlet water. The ultrafiltration membrane component 10 adopts cross flow filtration, part of concentrated water (containing 0.5-0.6 ppm of ozone) returns to the front end of the system through the third branch pipe 143 for recycling, the ultrafiltration membrane component 10 adopts a strong oxidation resistant ultrafiltration membrane, and the ozone reaction tank 7 can also remove chromaticity, smell and organic pollutants in the water.
And a sixth step: after the ultrafiltration membrane component ultrafiltrates the effluent water, chlorine is supplemented through the dosing device 11 and enters the clean water tank 12, so that the ultrafiltration effluent water reaches the national requirements, and finally the ultrafiltration effluent water is discharged by the clean water pump 13 to realize water supply.
The system and the process have the advantages that the structure is simple, the use is convenient, the pressure ozone reaction can be utilized to kill algae and bacteria in raw water by utilizing the system and the process, a large amount of organic matters can be filtered by arranging the lamination, the organic matters in the ozone reaction tank are reduced, and the ozone reaction efficiency is improved. And simultaneously, the Venturi and the ozone generator are arranged in front of the laminated filter, so that the laminated filter is cleaned by ozone, pollutants on the filter are effectively crushed, and the filter is more easily backwashed and is removed out of the filter holes.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure thereof.
Claims (5)
1. A water treatment system for realizing continuous cleaning by utilizing pressure ozone is characterized in that: comprises a raw water pump (1), a mechanical grid prefilter (2), a booster pump (3), a venturi (4), an ozone generator (5), a laminated filter (6), an ozone reaction tank (7), an ozone microbubble generator (8), a wastewater discharge port (9), an ultrafiltration membrane component (10), a dosing device (11), a clean water tank (12) and a clean water pump (13); the import of raw water pump (1) passes through outside river, lake raw water of pipeline intercommunication, the export of raw water pump (1) passes through the import intercommunication of pipeline and mechanical grid prefilter (2), the export of mechanical grid prefilter (2) forms first branch pipe (141) and second branch pipe (142), second branch pipe (142) are gathered and are connected with the import of smart filtration equipment with first branch pipe (141) after booster pump (3) and venturi (4) are connected, the import of venturi (4) passes through pipeline series ozone generator (5), the export of smart filtration equipment passes through pipe connection ozone retort (7), the export of ozone retort (7) passes through the pipe connection with the import of ozone microbubble generator (8), the exit linkage ultrafiltration membrane subassembly (10) of ozone microbubble generator (8), the water outlet of the ultrafiltration membrane component (10) is sequentially connected with a clean water tank (12) and a clean water pump (13) through pipelines, a dosing device (11) is further connected in series on the pipeline between the water outlet of the ultrafiltration membrane component (10) and the clean water tank (12), part of concentrated water treated by the ultrafiltration membrane component (10) flows back through a third branch pipeline (143) and is communicated with the pipeline connected with the inlet of the raw water pump (1), and the ultrafiltration membrane component (10) is further communicated with a waste water discharge port (9) through the pipeline.
2. A water treatment system utilizing pressurized ozone for continuous cleaning as claimed in claim 1 wherein: the ultrafiltration membrane component (10) is also communicated with a wastewater discharge port (9) through a pipeline.
3. A water treatment system utilizing pressurized ozone for continuous cleaning as claimed in claim 1 wherein: the filtration range of the fine filtration equipment is 100 um-200 um.
4. A water treatment system utilizing pressurized ozone for continuous cleaning as claimed in claim 3 wherein: the fine filtering equipment adopts a laminated filter (6) or a ceramic filter.
5. A process for treating a water treatment system using pressurized ozone for continuous cleaning according to claim 1, comprising the steps of:
the first step is as follows: introducing raw water of rivers and lakes into a mechanical grid prefilter through a raw water pump to prefilter large particles;
the second step is that: pressurizing pre-filtered 10-20% of raw water, then feeding the pre-filtered raw water into a venturi, mixing ozone and the raw water to form mixed raw water, and collecting the pre-filtered 80% of raw water and the mixed raw water, and then feeding the mixed raw water into a fine filter for precision treatment;
the third step: the dissolved ozone and raw water enter an ozone reaction tank to carry out strong oxidation reaction;
the fourth step: ozone and raw water after the strong oxidation reaction enter an ozone microbubble generator to generate a plurality of bubbles;
the fifth step: a plurality of bubbles generated in the fourth step enter an ultrafiltration membrane component for microbubble reaction, and raw water enters the interior of an ultrafiltration membrane body for filtration and continuously ultrafilters effluent;
and a sixth step: after the water is ultrafiltered out by the ultrafiltration membrane component, chlorine is supplemented by the chemical adding device and enters the clean water tank, and the water is discharged by the clean water pump to realize water supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911355424.9A CN110981023A (en) | 2019-12-25 | 2019-12-25 | Water treatment system and process for realizing continuous cleaning by utilizing pressure ozone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911355424.9A CN110981023A (en) | 2019-12-25 | 2019-12-25 | Water treatment system and process for realizing continuous cleaning by utilizing pressure ozone |
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| CN110981023A true CN110981023A (en) | 2020-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849487A (en) * | 2022-06-01 | 2022-08-05 | 北京北排膜科技有限公司 | Cleaning system and method for ultrafiltration membrane |
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| KR20020028011A (en) * | 2000-10-06 | 2002-04-15 | 이회성 | Water sterilizing system |
| CN104925984A (en) * | 2014-03-20 | 2015-09-23 | 拜森生物环保科技（上海）有限公司 | Irrigation water processing method and device |
| CN106007060A (en) * | 2016-06-22 | 2016-10-12 | 江苏新纪元环保有限公司 | Original ecological water treatment process and treatment system adopting same |
| CN206828249U (en) * | 2017-04-14 | 2018-01-02 | 广州合昕环境科技有限公司 | Integrated sewage water puies forward mark processing equipment |
| CN211770679U (en) * | 2019-12-25 | 2020-10-27 | 江苏达格水务有限公司 | Water treatment system for realizing continuous cleaning by utilizing pressure ozone |
-
2019
- 2019-12-25 CN CN201911355424.9A patent/CN110981023A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020028011A (en) * | 2000-10-06 | 2002-04-15 | 이회성 | Water sterilizing system |
| CN104925984A (en) * | 2014-03-20 | 2015-09-23 | 拜森生物环保科技（上海）有限公司 | Irrigation water processing method and device |
| CN106007060A (en) * | 2016-06-22 | 2016-10-12 | 江苏新纪元环保有限公司 | Original ecological water treatment process and treatment system adopting same |
| CN206828249U (en) * | 2017-04-14 | 2018-01-02 | 广州合昕环境科技有限公司 | Integrated sewage water puies forward mark processing equipment |
| CN211770679U (en) * | 2019-12-25 | 2020-10-27 | 江苏达格水务有限公司 | Water treatment system for realizing continuous cleaning by utilizing pressure ozone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849487A (en) * | 2022-06-01 | 2022-08-05 | 北京北排膜科技有限公司 | Cleaning system and method for ultrafiltration membrane |
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Application publication date: 20200410 |
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