CN204602009U - A kind of efficient reverse osmosis membrane on-line cleaning device - Google Patents
A kind of efficient reverse osmosis membrane on-line cleaning device Download PDFInfo
- Publication number
- CN204602009U CN204602009U CN201520142919.4U CN201520142919U CN204602009U CN 204602009 U CN204602009 U CN 204602009U CN 201520142919 U CN201520142919 U CN 201520142919U CN 204602009 U CN204602009 U CN 204602009U
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- Prior art keywords
- cleaning
- alkali
- water tank
- valve
- reverse osmosis
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- Expired - Fee Related
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- 238000004140 cleaning Methods 0.000 title claims abstract description 125
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 24
- 239000012528 membrane Substances 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000003513 alkali Substances 0.000 claims abstract description 56
- 230000002000 scavenging effect Effects 0.000 claims abstract description 49
- 239000002253 acid Substances 0.000 claims abstract description 34
- 238000001764 infiltration Methods 0.000 claims description 17
- 239000000126 substance Substances 0.000 claims description 16
- 238000011049 filling Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 15
- 238000010992 reflux Methods 0.000 claims description 10
- 238000005554 pickling Methods 0.000 claims description 4
- 238000010612 desalination reaction Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 abstract description 9
- 238000011282 treatment Methods 0.000 abstract description 5
- 238000004090 dissolution Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 229940079593 drug Drugs 0.000 abstract 1
- 238000010926 purge Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920011532 unplasticized polyvinyl chloride Polymers 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- AOJJSUZBOXZQNB-VTZDEGQISA-N 4'-epidoxorubicin Chemical compound O([C@H]1C[C@@](O)(CC=2C(O)=C3C(=O)C=4C=CC=C(C=4C(=O)C3=C(O)C=21)OC)C(=O)CO)[C@H]1C[C@H](N)[C@@H](O)[C@H](C)O1 AOJJSUZBOXZQNB-VTZDEGQISA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The open a kind of efficient reverse osmosis membrane on-line cleaning device of the utility model, belongs to Membrane Separation for Water Treatment field.Be provided with independent special acid, alkali purging system, supporting medicament dissolution throwing device respectively, cleaning water tank, each cleaning water tank is furnished with steam heater and water tank temperature gauge tap is chain, can guarantee to clean water temperature, drug concentration, improves cleaning performance, save scavenging period, and avoid manually-operated danger, accuracy; Innovation pipeline and the design of cleaning cartridge filter, can carry out reuse to filter core, extend filter core physical life 3 times, greatly saved operating cost.
Description
Technical field
The utility model relates to a kind of efficient reverse osmosis membrane on-line cleaning device, belongs to Membrane Separation for Water Treatment field.
Background technology
Reverse osmosis technology just began one's study in the fifties, the reverse osmosis membrane with industrial value is made to the end of the sixties, within 1971, start have industrialness reverse osmosis unit to put into operation in power plant, adopt now hyperfiltration to carry out water treatment throughout countries such as the U.S., Japan, France, Italy.China started to introduce reverse osmosis unit in the water treatment in power plant the end of the seventies, the developing and become focus of the reverse osmosis membrane nineties, present reverse osmosis technology is mainly used in the wastewater treatments such as desalinization, pure water and ultra-pure water preparation, city water process, municipal sewage treatment and wastewater of steel industry process, chemical wastewater treatment, food industry, medical industry.
Be in operation, RO film (reverse osmosis membrane) may by pollutions such as inorganic substance contaminants, colloid, microorganism, metal oxides.These electrodeposition substances on the surface of the film, will cause RO film transit dose to decline and salt rejection rate reduction.Therefore, in order to recover transit dose and the desalting performance of RO film, need to carry out in-site chemical cleaning termly to RO.But along with the prolongation of the cycle of operation, the decline of film properties, the formation of combined pollution and increasing the weight of, need utilize counter-infiltration cleaning device, clean, recover the performance of film.Conventional cleaning device, only have cleaning water tank, flushing water pump, a filter, pipeline configuration mode is simple, manual operation, labour intensity is large, and concentration of making up a prescription, temperature are inaccurate, cleaning performance is poor, thoroughly cannot remove the pollutant on film, causes the performance of reverse osmosis membrane greatly to decline, and when during cleaning, soda acid medicament switches, washing time is long, there is plenty of time waste, extends scavenging period, decrease the cycle of operation, affect counter-infiltration production capacity.
In cleaning process, because dirty pollutant in water content is high, the dirt of filter rinsed filter core is stifled fast, and change frequent, cost is high.
Summary of the invention
The utility model provides a kind of efficient reverse osmosis membrane on-line cleaning device, arranges independently soda acid cleaning water tank, and when avoiding acid, alkali cleaning switching, cleaning water tank remains medicament and rinses thorough, affects cleaning performance; Achieve and automatically accurately add cleaning agent, automatically control rinse liquid temperature, the key parameters such as observable cleaning pH, pressure, flow, adjust cleaning program in time, take this device, achieve the repetition reuse capable of washing of security personnel's filter core, cost-saving.
The technical solution adopted in the utility model is: a kind of efficient reverse osmosis membrane on-line cleaning device, comprise acid cleaning water tank, alkali cleaning water tank, it is characterized in that: described acid cleaning water tank and alkali cleaning water tank produce water side reflux with Chemical cleaning respectively and be responsible for, the dense water side reflux supervisor of Chemical cleaning, steam pipe, cleaning dosing filling pipe, acid adds pump, alkali adds pump and connects, alkali cleaning temp control switch and alkali liquid level gauge is provided with outside alkali cleaning water tank, pickling temperature gauge tap and sour liquid level gauge is provided with outside acid cleaning water tank, cleaning water inlet supervisor connects acid cleaning water tank and alkali cleaning water tank respectively by flowmeter, alkali cleaning water tank outlet section connects 1# scavenging pump water intaking valve, 1# counter-infiltration scavenging pump, 1# scavenging pump delivery gauge, 1# non-return valve, 1# scavenging pump outlet valve, pH/ thermometer, cartridge filter successively, acid cleaning water tank outlet section connects 2# scavenging pump water intaking valve, 2# counter-infiltration scavenging pump, 2# scavenging pump delivery gauge, 2# non-return valve, 2# scavenging pump outlet valve, pH/ thermometer, cartridge filter successively.
Described acid adds pump and connects sour batch meter, and alkali adds pump and connects alkali batch meter, and the volume of sour batch meter and alkali batch meter is 2m
3.
Outlet conduit after described cleaning dosing filling pipe connection desalination water pump, for injecting cleaning demineralized water used.
Described sour batch meter is connected with cleaning dosing filling pipe, is provided with liquid level gauge outside sour batch meter.
Described alkali batch meter is connected with cleaning dosing filling pipe, is provided with liquid level gauge, is provided with mixer in alkali batch meter outside alkali batch meter.
Described cartridge filter installs large discharge Foldable filter element, and upper end is provided with security personnel's inlet gage, and lower end is provided with security personnel's discharge pressure table, and bottom is provided with influent side blowoff valve and produces water side blowoff valve, passes through Valve controlling.
Described 1# scavenging pump water intaking valve is communicated with 2# scavenging pump water intaking valve, and the two can be for subsequent use each other.
The efficient reverse osmosis membrane on-line cleaning device that the utility model provides, improves counter-infiltration cleaning performance, extends the counter-infiltration cycle of operation, saves scavenging period, reduces cleaning cost; Be embodied in:
(1) a kind of efficient counter-infiltration on-line cleaning device, configure the acid of independently counter-infiltration Chemical cleaning, equipment such as alkali cleaning water tank and supporting dispensing, heating, scavenging pump, cleaning cartridge filter etc., save the washing time of water tank during medicament conversion, improve cleaning performance;
(2) each cleaning water tank also configures acid, alkali automatic adding device respectively, comprise sour batch meter, measuring pump and corollary equipment, improve the degree of accuracy of adding of agent, avoid manually the corrosivity medicaments such as dosing acid, alkali to the harm of the person simultaneously, and can realize for subsequent use each other by Valve controlling two covering device;
(3) each cleaning water tank configuration steam stainless steel heating tube, is above furnished with pneumatic steam valve, and casing is provided with high and low temperature gauge tap apart from 1/4 place at the bottom of pond, and temperature switch is chain with pneumatic steam valve, realizes cleaning fluid heating control automatically;
(4) export on female pipe at scavenging pump and be provided with online PH/ thermometer, flowmeter is convenient to observe cleaning situation, adjusts cleaning program in time;
(5) clean cartridge filter (enclosure material carbon steel line with rubber) and adopt large discharge Foldable filter element, filter core quantity is few, it is convenient to change, and be provided with influent side blowoff valve and produce the blowdown of water side, innovation pipeline is arranged, by Valve controlling, reuse cleaning can be carried out to filter core, extend filter core physical life 3 times.
Below in conjunction with drawings and Examples, the utility model is described further.
Accompanying drawing explanation
Fig. 1 is the utility model apparatus main body structural representation.
Fig. 2 is cleaning administration device schematic diagram.
In figure: 1 is alkali cleaning water tank, 2 is acid cleaning water tank, 3 produce water side reflux for Chemical cleaning is responsible for, 4 is the dense water side reflux supervisor of Chemical cleaning, 5 is steam pipe, 6 is cleaning dosing filling pipe, 7 add pump for acid, 8 add pump for alkali, 9 is alkali cleaning temp control switch, 10 is alkali liquid level gauge, 11 is pickling temperature gauge tap, 12 is sour liquid level gauge, 13 is cleaning water inlet supervisor, 14 is flowmeter, 15 is 1# scavenging pump water intaking valve, 16 is 1# counter-infiltration scavenging pump, 17 is 1# scavenging pump delivery gauge, 18 is 1# non-return valve, 19 is 1# scavenging pump outlet valve, 20 is pH/ thermometer, 21 is cartridge filter, 22 is 2# scavenging pump water intaking valve, 23 is 2# counter-infiltration scavenging pump, 24 is 2# scavenging pump delivery gauge, 25 is 2# non-return valve, 26 is 2# scavenging pump outlet valve, 27 is sour batch meter, 28 is alkali batch meter, 29 is mixer, 30 is security personnel's inlet gage, 31 is security personnel's discharge pressure table, 32 is influent side blowoff valve, 33 for producing water side blowoff valve.
Detailed description of the invention
Embodiment:
As Fig. 1, shown in 2, a kind of efficient reverse osmosis membrane on-line cleaning device, comprise acid cleaning water tank 2, alkali cleaning water tank 1, it is characterized in that: described acid cleaning water tank 2 and alkali cleaning water tank 1 produce water side reflux with Chemical cleaning respectively and be responsible for 3, the dense water side reflux supervisor 4 of Chemical cleaning, steam pipe 5, cleaning dosing filling pipe 6, acid adds pump 7, alkali adds pump 8 and connects, alkali cleaning temp control switch 9 and alkali liquid level gauge 10 is provided with outside alkali cleaning water tank 1, pickling temperature gauge tap 11 and sour liquid level gauge 12 is provided with outside acid cleaning water tank 2, cleaning water inlet supervisor 13 connects acid cleaning water tank 2 and alkali cleaning water tank 1 respectively by flowmeter 14, alkali cleaning water tank 1 outlet section connects 1# scavenging pump water intaking valve 15,1# counter-infiltration scavenging pump 16,1# scavenging pump delivery gauge 17,1# non-return valve 18,1# scavenging pump outlet valve 19, pH/ thermometer 20, cartridge filter 21 successively, acid cleaning water tank 2 outlet section connects 2# scavenging pump water intaking valve 22,2# counter-infiltration scavenging pump 23,2# scavenging pump delivery gauge 24,2# non-return valve 25,2# scavenging pump outlet valve 26, pH/ thermometer 20, cartridge filter 21 successively.
Described acid adds pump 7 and connects sour batch meter 27, and alkali adds pump 8 and connects alkali batch meter 28, and the volume of sour batch meter 27 and alkali batch meter 28 is 2m
3.
Outlet conduit after described cleaning dosing filling pipe connection desalination water pump, for injecting cleaning demineralized water used.
Described sour batch meter 27 is connected with cleaning dosing filling pipe 6, is provided with liquid level gauge outside sour batch meter.
Described alkali batch meter 28 is connected with cleaning dosing filling pipe 6, is provided with liquid level gauge, is provided with mixer 29 in alkali batch meter outside alkali batch meter.
Described cartridge filter 21 installs large discharge Foldable filter element, and upper end is provided with security personnel's inlet gage 30, and lower end is provided with security personnel's discharge pressure table 31, and bottom is provided with influent side blowoff valve 32 and produces water side blowoff valve 33, passes through Valve controlling.
Described 1# scavenging pump water intaking valve 15 is communicated with 2# scavenging pump water intaking valve 22, and the two is for subsequent use each other.
Concrete preparation method is:
A kind of efficient reverse osmosis membrane on-line cleaning device is divided into four parts, and medicament dissolution adds (accompanying drawing 2), cleaning water tank, scavenging pump, cleaning cartridge filter (accompanying drawing 1).
Brief description:
1, cleaning agent dissolves and adds part: have acid, basic agent dissolving throwing device is each a set of, and wherein basic agent dissolving throwing device is: 1 2m
3batch meter (FRP glass fiber reinforced plastics composite material), φ 400mm medicine feeding hole is opened at batch meter top, and φ 25mm demineralized water water supplement port is connected with filling pipe, and is furnished with mixer.Sidewall is furnished with magnetic flap level gauge (0-1.1m), bottom is furnished with DN50 discharge outlet, DN25 fluid mother pipe, is connected with measuring pump after female pipe installing valve and piping filter additional, is connected after measuring pump drain pipe installs DN15 non-return valve, ball valve additional with cleaning water tank.Acid medicine dissolves throwing device substantially the same with alkalescence (not having mixer).Pipeline and valve all adopt UPVC material.
2, water tank (FRP glass fiber reinforced plastics composite material) part is cleaned: total acid, alkali cleaning each one of water tank, volume is 15m
3wherein alkali rinse water tank top perforate Φ 200mm, Φ 80mm, Φ 100mm, Φ 15mm, Φ 15mm, Φ 150mm, welding short joint flange, connect respectively at the dense water side reflux supervisor of RO Chemical cleaning, RO Chemical cleaning product water side reflux supervisor, cleaning filling pipe, acid, alkali drug-feeding tube, cleaning return main, and mounted valve, perforate Φ 200mm draws stainless steel DN50 heating tube, stretches into water tank apart from bottom 1/4 place, and installs steam pneumatic operated valve additional; Water tank wall installs magnetic flap level gauge, casing apart from 1/4 place's installation height temp control switch at the bottom of pond and steam pneumatic operated valve chain.Acid cleaning water tank is identical with alkali, and each cleaning water tank bottom is provided with drain pipe, converges into the female pipe of DN300 to scavenging pump after mounted valve.
3, scavenging pump part: be provided with 2 scavenging pumps in parallel, every platform scavenging pump is imported and exported and is provided with valve, Pressure gauge (0 ~ 0.6Mpa), main water outlet pipe is installed PH/ temperature (PH:0 ~ 14, temperature: 0 ~ 100 DEG C) in-line meter.Ordinary circumstance universal cleaning selects flow 300m
3/ h, the chemical pump of lift 40m.
4, cartridge filter part is cleaned: cleaning cartridge filter (enclosure material is carbon steel line with rubber) adopts large discharge Foldable filter element, filter core quantity is few, it is convenient to change, Inlet and outlet water setting pressure table (0 ~ 0.6Mpa) is also provided with influent side blowoff valve and produces the blowdown of water side, innovation pipeline is arranged, by Valve controlling, reuse cleaning can be carried out to filter core, extend filter core physical life 3 times.
5, except jet chimney adopts 316L stainless steel, all the other all adopt UPVC, and more than valve DN50 adopts stainless steel butterfly valve, and all the other adopt UPVC ball valve.
Taiyuan Iron and Steel Co. energy source and power head factory three film adopts smelting factory effluent to be water source, in water, hardness, bacterium, microorganism, organic matter etc. are relatively many, counter-infiltration is in this sewage in long-term running, and dirty stifled serious, cleaning is frequent, after this device on probation, improve counter-infiltration cleaning performance, saved scavenging period, extend the counter-infiltration cycle of operation, reduce cleaning cost, improve production capacity.
Claims (7)
1. an efficient reverse osmosis membrane on-line cleaning device, comprise acid cleaning water tank, alkali cleaning water tank, it is characterized in that: described acid cleaning water tank and alkali cleaning water tank produce that water side reflux is responsible for, the dense water side reflux of Chemical cleaning is responsible for respectively with Chemical cleaning, steam pipe, cleaning dosing filling pipe, acid add pump, alkali adds pump and is connected, alkali cleaning temp control switch and alkali liquid level gauge is provided with outside alkali cleaning water tank, be provided with pickling temperature gauge tap and sour liquid level gauge outside acid cleaning water tank, cleaning water inlet supervisor connects acid cleaning water tank and alkali cleaning water tank respectively by flowmeter; Alkali cleaning water tank outlet section connects 1# scavenging pump water intaking valve, 1# counter-infiltration scavenging pump, 1# scavenging pump delivery gauge, 1# non-return valve, 1# scavenging pump outlet valve, pH/ thermometer, cartridge filter successively; Acid cleaning water tank outlet section connects 2# scavenging pump water intaking valve, 2# counter-infiltration scavenging pump, 2# scavenging pump delivery gauge, 2# non-return valve, 2# scavenging pump outlet valve, pH/ thermometer, cartridge filter successively.
2. efficient reverse osmosis membrane on-line cleaning device according to claim 1, is characterized in that: described acid adds pump and connects sour batch meter, and alkali adds pump and connects alkali batch meter, and the volume of sour batch meter and alkali batch meter is 2m
3.
3. efficient reverse osmosis membrane on-line cleaning device according to claim 2, is characterized in that: described sour batch meter is connected with cleaning dosing filling pipe, is provided with liquid level gauge outside sour batch meter.
4. efficient reverse osmosis membrane on-line cleaning device according to claim 2, is characterized in that: described alkali batch meter is connected with cleaning dosing filling pipe, is provided with liquid level gauge, is provided with mixer in alkali batch meter outside alkali batch meter.
5. efficient reverse osmosis membrane on-line cleaning device according to claim 1, is characterized in that: outlet conduit after described cleaning dosing filling pipe connection desalination water pump, for injecting cleaning demineralized water used.
6. efficient reverse osmosis membrane on-line cleaning device according to claim 1, it is characterized in that: described cartridge filter installs large discharge Foldable filter element, upper end is provided with security personnel's inlet gage, lower end is provided with security personnel's discharge pressure table, bottom is provided with influent side blowoff valve and produces water side blowoff valve, passes through Valve controlling.
7. efficient reverse osmosis membrane on-line cleaning device according to claim 1, is characterized in that: described 1# scavenging pump water intaking valve is communicated with 2# scavenging pump water intaking valve, realizes for subsequent use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520142919.4U CN204602009U (en) | 2015-03-13 | 2015-03-13 | A kind of efficient reverse osmosis membrane on-line cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520142919.4U CN204602009U (en) | 2015-03-13 | 2015-03-13 | A kind of efficient reverse osmosis membrane on-line cleaning device |
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| Publication Number | Publication Date |
|---|---|
| CN204602009U true CN204602009U (en) | 2015-09-02 |
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| CN201520142919.4U Expired - Fee Related CN204602009U (en) | 2015-03-13 | 2015-03-13 | A kind of efficient reverse osmosis membrane on-line cleaning device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979022A (en) * | 2021-03-02 | 2021-06-18 | 嘉善乐枫生物科技有限公司 | Preparation and cleaning process of ultrapure water device in laboratory |
| CN114632424A (en) * | 2022-04-28 | 2022-06-17 | 华能威海发电有限责任公司 | Acid-base comprehensive compensation system and method for chemical cleaning of reverse osmosis membrane |
| CN114643246A (en) * | 2022-03-17 | 2022-06-21 | 重庆钢铁股份有限公司 | Cleaning system and method for rapidly reducing ammonia still resistance |
-
2015
- 2015-03-13 CN CN201520142919.4U patent/CN204602009U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979022A (en) * | 2021-03-02 | 2021-06-18 | 嘉善乐枫生物科技有限公司 | Preparation and cleaning process of ultrapure water device in laboratory |
| CN114643246A (en) * | 2022-03-17 | 2022-06-21 | 重庆钢铁股份有限公司 | Cleaning system and method for rapidly reducing ammonia still resistance |
| CN114632424A (en) * | 2022-04-28 | 2022-06-17 | 华能威海发电有限责任公司 | Acid-base comprehensive compensation system and method for chemical cleaning of reverse osmosis membrane |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 |