CN101643284A - Reverse osmosis water treatment method and equipment with high desalination and high water productivity - Google Patents
Reverse osmosis water treatment method and equipment with high desalination and high water productivity Download PDFInfo
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- CN101643284A CN101643284A CN200810147301A CN200810147301A CN101643284A CN 101643284 A CN101643284 A CN 101643284A CN 200810147301 A CN200810147301 A CN 200810147301A CN 200810147301 A CN200810147301 A CN 200810147301A CN 101643284 A CN101643284 A CN 101643284A
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- Y02A20/131—Reverse-osmosis
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Abstract
The invention relates to a reverse osmosis water treatment method and equipment with high desalination and high water productivity. The method comprises the technical scheme that: raw water is filtered through a deep bed filter system and is sent into an ion-exchange softening system for softening treatment to remove hardness, forms reverse osmosis influent water after PH value adjustment, and issent to a high-desalination and high water productivity reverse osmosis system for desalinating after the influent water is pressurized by a reverse osmosis high pressure pump, wherein the high-desalination and high water productivity reverse osmosis system is adjusted to control the reverse osmosis recovery rate at between 75 and 90 percent. The water treatment method and equipment can effectively treat sewage, have water concentration rate of between 10 and 25 percent, and have smaller raw water consumption amount than that of the prior reverse osmosis system under a condition of equal wateryield, have smaller damage to a reverse osmosis system film, and are more economic and practical.
Description
Technical field
The present invention relates to a kind of former water be carried out the method and apparatus of reverse-osmosis treated, particularly relate to a kind of reverse osmosis treatent method and equipment of high desalination high yield water rate.
Background technology
The principle of Reverse Osmosis Water Treatment Technology utilization is the inverse process of occurring in nature phenomenon of osmosis, promptly overcomes osmotic pressure with extraneous impellent the water in the brackish water is permeated by film is retrograde.Under the feed temperature condition, reverse osmosis adopts the physical method of no phase transformation that brackish water is carried out desalination, purifying, its energy consumption is low, chemical agent that need not be a large amount of and acid, the alkali manipulation of regeneration, the matting of membrane removal does not have chemical waste fluid and spent acid outward, the alkali lye discharging, non-environmental-pollution, continuously-running system water, system is simple, and is easy to operate, the product water quality stabilizing, and be adapted in a big way raw water quality, both be adapted to brackish water, seawater is adapted to the fresh water treatment of less salt amount again down to the processing of sewage, therefore, be widely used in electric power, oil, electronics, food, hospital/pharmacy, a plurality of fields such as sea water desaltination.
Traditional reverse osmosis technology, the rate of recovery are controlled at 65-75% usually; Requirement to raw water quality is also higher, and SDI is less than 5, and as water inlet TOC during greater than 2mg/l, reverse osmosis membrane just must be noted biological pollution; Because the existence of high-valence cationic, heavy metal and anionic part, dense water side easily forms fouling, and colloid pollution and microbial contamination take place easily.
In order to improve the rate of recovery, common solution is that the dense water that reverse osmosis is come out is further processed recovery, to improve the rate of recovery of former water, perhaps increase pretreated operation, just multiple times of filtration need be carried out in pretreatment technology such as the reverse-osmosis treated at the high waste water of iron and steel enterprise's foreign matter content in " reverse osmosis sewage water treatment method; ZL200410012228.9 ", ozone sterilization, oxidizing substance etc. in the reductive agent reductive water.Though increased the rate of recovery of water by such technical scheme, need to increase more equipment, more operation consumes the more energy; The easy contaminated problem of also also unresolved reverse osmosis membrane of while.
The efficient reverse osmosis control reverse osmosis rate of recovery is more than 90%, because the too high rate of recovery, require its pre-treatment must reach the removal of hardness and basicity completely, it is about about 20% that the cost of pre-treatment and reverse osmosis system improves, and the corresponding raising of running cost is more than 20%.Set forth as U.S. Pat 6537456: former water, adds alkali again and regulates pH value with thorough removal hardness and basicity through decarburization after comprising the melded system that Weak-acid cation softens, and the reverse osmosis rate of recovery reaches more than 90%.This system has increased cost of investment, running cost has increased more than 20% in the time must removing basicity, and increased the risk of operation, promptly reach 90% when above in the reverse osmosis rate of recovery, must accomplish that pre-treatment reaches the removal fully of hardness and basicity,, cause the film system fault even the hardness of trace is revealed the rapid rising that also can cause reverse osmosis pressure reduction, bring the difficulty in the operational management, can cause the paralysis fully of system when serious.
Summary of the invention
Low in order to solve in the above prior art rate of recovery, complex process, reverse osmosis membrane pollutes, problems such as reverse osmosis system economy and safety in operation, the invention provides a kind of high desalination high yield water rate reverse osmosis water treatment method and equipment, make various trade effluents, the efficient that municipal wastewater is handled improves, and the investment of reverse osmosis water treating equipment and running cost reduce.
Technical scheme of the present invention is: a kind of high desalination high yield water rate reverse osmosis water treatment method, comprise former water pretreatment, water forms feed water by reverse osmosis and carries out reverse-osmosis treated after the pre-treatment, obtain to produce water and dense water, it is characterized in that former water pretreatment comprises carries out Depth Filtration to former water, to filter out most of suspended particulate and colloid and partial organic substances; Water after the filtration is sent into and is softened processing in the ion exchange softening system, removes hardness, comprises that some influence the indissoluble high-valence cationic of reverse osmosis, as iron, aluminium, barium, strontium etc.; Softening water adds sodium hydroxide solution and carries out the pH value adjusting, is adjusted to alkalescence, forms feed water by reverse osmosis; Feed water by reverse osmosis is sent in the high desalination high yield water rate reverse osmosis system after by the supercharging of reverse osmosis high-pressure pump and is carried out desalination then, regulate high desalination high yield water rate reverse osmosis system and make the reverse osmosis rate of recovery be controlled at 75-90%, preferably regulating the reverse osmosis rate of recovery is 80-90%.
When raw water turbidity is higher, can before described Depth Filtration, earlier former water be carried out coagulation clarification and filter.
Described Depth Filtration can adopt more medium filter or high-efficiency fiber filter to filter.
Ion exchange softening technology is adopted in described softening processing, removes hardness, comprises that some influence the high-valence cationic of the indissoluble of reverse osmosis.Softening process can be that one-level is softening or secondary is softening; Can be fixed bed or floating bed; Can be individual layer bed or double bunk.
Can be before described ion exchange softening technology earlier with lime softening process or the softening in advance water inlet of soda-lime softening process.Lime softening process or soda-lime softening process can make the further coagulation clarification of the higher water inlet of turbidity, and remove the hardness of part, to reduce the load of ion exchange softening system.
Described ion exchange softening technology can adopt sodium ion exchange softening process or/and Hydrogen cationic exchange softening process.
Softening water after the Hydrogen ion exchange softening is handled carries out carbonization treatment through decarbonization process such as air blast or gas separation membranes, sloughs carbonic acid gas.
Before entering described high desalination high yield water rate reverse osmosis system, can in described feed water by reverse osmosis, add the Scale inhibitors of extremely low amount, the amount≤1.5ppm of Scale inhibitors, the materials of revealing when preventing former water pretreatment such as a small amount of Ca, Mg produce fouling in the dense water side of film.
The amount of preferred described Scale inhibitors is controlled at 0.5-1ppm.
Regulate high desalination high yield water rate reverse osmosis system and make the reverse osmosis rate of recovery be controlled at 75-90%, preferably regulating the reverse osmosis rate of recovery is 80-90%.The purpose of regulating the reverse osmosis rate of recovery is to make system to move under more economical, more stable condition.When the reverse osmosis produced water rate is lower than 75-80% in the conventional reverse osmosis technology, the technology that reverse osmosis concentrated water is for further processing and reclaims is arranged, so that improve the rate of recovery of system, but the investment increase, running cost improves, and the failure rate of dense water treatment is higher.And the reverse osmosis produced water rate is higher than at 90% o'clock, requirement to former water pretreatment significantly improves, general requirement is removed hardness and basicity fully, the cost of investment and the working cost of total system are increased, descending also can appear in the operation stability of total system simultaneously, the pollution of reverse osmosis membrane and scaling tendency increase, and bring the difficulty in the operational management.Therefore the reverse osmosis produced water rate is controlled at 75-90%, has both guaranteed the efficient of system's operation, also guaranteed the stable of system's operation simultaneously, guaranteed the economical rationality of running cost.
Available feed water by reverse osmosis pump is sent water into 5 microns accurate filters before feed water by reverse osmosis enters the reverse osmosis high-pressure pump, with the particle of removal diameter greater than 5 microns, in order to avoid large particulate matter enters reverse osmosis system damage membrane element.
The dirty waste water that described former water can be high COD, high silicon content, fluctuation is bigger comprises industry or municipal wastewater, surface water or contaminated underground water after biochemical treatment.
The present invention also provides a kind of high desalination high yield water rate reverse osmosis water treating equipment, comprises raw water pump, depth filtration systems, ion exchange softening system, medicine system, reverse osmosis high-pressure pump, high desalination high yield water rate reverse osmosis system.Described raw water pump is sent former water into depth filtration systems and is filtered, and filtration back water enters the ion exchange softening system and softens, and sends into the desalination of high desalination high yield water rate reverse osmosis system by the pressurization of reverse osmosis high-pressure pump again, and final output is produced water and dense water.Medicine system can according to circumstances add alkali lye or Scale inhibitors before feed water by reverse osmosis enters the reverse osmosis high-pressure pump.
Described depth filtration systems is more medium filter or high-efficiency fiber filter.More medium filter makes in the water most suspended substances and colloid become the micro-floccule alumen ustum and holds back in the two-layered medium filtering layer and remove, and the medium filtering layer adopts the medium coupling of different-grain diameter, makes the unit volume filtrate that bigger retaining power be arranged.High-efficiency fiber filter then adopts the pencil wadding---and fiber is as the filter element of strainer, its filtrate diameter can reach tens microns even several microns, advantages such as it is big to have specific surface area, and filtration resistance is little, the filtering accuracy that has solved particulate filter is subjected to problems such as particle diameter of filter medium restriction.
When raw water turbidity is higher, can before described depth filtration systems, add a coagulation clarification filtering system, to remove anhydrate middle suspended particulate and colloid and partial organic substances.
Described ion exchange softening system can be that one-level is softening, also can be that secondary is softening; Can be fixed bed, also can be floating bed; Can be the individual layer bed, also can be double bunk.
Can add a lime melded system and carry out softeningly in advance before described ion exchange softening system, realize the coagulation clarification effect on the one hand, part that can be removed hardness on the other hand is to reduce the load of ion exchange softening system.
The ion exchange softening system can adopt sodium ion exchange melded system or/and Hydrogen ion exchange softening system.
According to different water quality, when handling, the Hydrogen ion exchange softening produces carbon dioxide, therefore add degas system after the ion exchange softening system, softening water can remove carbonic acid gas through degas system, and described degas system can be degassing tower or degassing film device.
Water after the degassing is handled can be introduced into degassing water tank and store, and sends in the reverse osmosis high-pressure pump again.
Before the reverse osmosis high-pressure pump, also can add a feed water by reverse osmosis pump and 5 microns accurate filters, with the particle of removal diameter, in order to avoid large particulate matter enters reverse osmosis system damage membrane element greater than 5 microns.
The ratio of desalinization of described high desalination high yield water rate reverse osmosis system can reach more than 98%.
Beneficial effect of the present invention:
1) adopts water treatment method of the present invention and equipment, dense water rate is below 25%, the water application rate of total system promptly can be controlled in the 10-25%, and under the condition of the equal product water water yield, high desalination high yield water rate reverse osmosis system is little than the consumption of the former water of conventional reverse osmosis system.
2) adopt water treatment method of the present invention and equipment, concentrated water drainage is high-volume few, and industrial enterprise can take suitable mode to dispose the dense water of this part, or by hot method with the further condensing crystal of dense water, with the realization liquid zero emission.
And the product water of producing is a kind of high-quality pure water, can be used as industrial process water; It produces water and can be used as tap water through disinfecting of safety certification; At the high purity water, the ultrapure water that after overmulling bed or one-level, the mixed bed of secondary polishing or EDI processing, can be used as high pressure, ultra-high voltage, super critical boiler supplementary feed or electronic applications.
3) adopt water treatment method of the present invention and equipment, high desalination high yield water rate reverse osmosis system moves under high pH value, makes
This reverse osmosis system is not afraid of organism and biological pollution, can even operation under the environment of oil be arranged and be difficult for polluting in high COD and BOD concentration;
This reverse osmosis system has the ability of anti-particle contamination, can stand the particulate pollutant of relative high density; Can allow higher mud index SDI value;
This reverse osmosis system is not afraid of the fouling that difficulty soluble salt produces, and all polyvalent cations all are removed in pre-treatment; Even little leakage quantity is arranged, the Scale inhibitors that adds is the fouling of may command difficulty soluble salt also.
This reverse osmosis system is not afraid of the silicon dirt, the silicon of energy tolerance system water inlet high density.
Therefore, reverse osmosis system of the present invention can move under abominable water quality condition and not contaminated and generation incrustation scale, and film does not need frequent cleaning, and common matting number of times is controlled at 1 year one to twice.
4) adopt water treatment method of the present invention and equipment, be not provided with according to source quality and remove basicity and handle, compare cost of investment with the efficient reverse osmosis system of aforesaid U.S. Pat 6537456 and reduce about 20%, running cost reduces more than 20%, system is stable, is easy to control.
5) adopt water treatment method of the present invention and equipment, make the rate of recovery be controlled at 75-90% by regulating high desalination high yield water rate reverse osmosis system, compare with the efficient reverse osmosis system of aforesaid United States Patent (USP) technology, system's operating safety is stable, not being prone to because hardness is revealed causes the rising of reverse osmosis pressure reduction too fast, cause the film system fault, even the result of systemic breakdown occurs.
Description of drawings
Fig. 1 is the equipment synoptic diagram of the embodiment of the invention 1;
Fig. 2 is the equipment synoptic diagram of the embodiment of the invention 2.
Embodiment
With reference to the accompanying drawings, specify embodiments of the invention.
High desalination high yield water rate reverse osmosis water treating equipment of the present invention comprises coagulation clarification filtering system 1, raw water pump 2, depth filtration systems 3, this system selects more medium filter for use, and ion exchange softening system 4, this system select the softening bed of two-stage individual layer non diffusible ion exchange for use, degas system 5, degas system is selected degassing tower for use, decarburization water tank 6, reverse osmosis high-pressure pump 7, medicine system 8, high desalination high yield water rate reverse osmosis system 9.Method of the present invention comprises that former water is that opacity is higher, contains the industrial sewage of high silicon amount, high COD, and former water is filtered in coagulation clarification filtering system 1, removes suspended particulate and colloid and partial organic substances in the water; Send into depth filtration systems 3 by raw water pump 2 then and filter out impurity such as fine particle in the water, suspended substance, colloid, organism; Water after filtering enters ion exchange softening system 4, removes hardness and basicity, comprises that some influence the high-valence cationic of the indissoluble of reverse osmosis, as iron, aluminium, barium, strontium etc.; Enter degas system 5 through remollescent water, adopt the air blast mode to slough carbon dioxide; Water after the decarburization enters decarburization water tank 6, and medicine system 8 adds sodium hydroxide solution in water, regulates pH value to alkalescence, adds the Scale inhibitors of 0.5ppm subsequently again, produces fouling with the materials such as a small amount of Ca, Mg that prevent to reveal in the former water pretreatment in the dense water side of film; Water after regulating pH value and adding Scale inhibitors is sent into high desalination high yield water rate reverse osmosis system 9 via 7 pressurizations of reverse osmosis high-pressure pump and is carried out desalination, and product water that finally comes out and dense water, producing water ratio are about 88%.
High desalination high yield water rate reverse osmosis water treating equipment of the present invention comprises lime melded system 10, raw water pump 2, depth filtration systems 3, this system selects high-efficiency fiber filter for use, ion exchange softening system 4, this system selects the one-level individual layer ion exchange softening bed that floats for use, degas system 5, and this system selects the degassing film device for use, decarburization water tank 6,11,5 microns accurate filters 12 of feed water by reverse osmosis pump, reverse osmosis high-pressure pump 7, medicine system 8, high desalination high yield water rate reverse osmosis system 9.Method of the present invention comprises, former water is the industrial sewage after biochemical treatment and the mixing water of contaminated surface water, and former water is introduced into lime melded system 10, adopts the lime softening process to remove part hardness, reduces the load of ion exchange softening system; Pre-softening water is sent into depth filtration systems 3 by raw water pump 2 and is filtered out impurity such as fine particle in the water, suspended substance, colloid, organism; Then enter melded system 4, remove hardness and basicity, and remove the high-valence cationic of other indissolubles that influence reverse osmosis simultaneously, as iron, aluminium, barium, strontium etc.; Enter degas system 5 through remollescent water, adopt the gas separation membrane mode to slough carbon dioxide; Water after the decarburization enters decarburization water tank 6, and decarburization water is sent into 5 microns accurate filters 12 through feed water by reverse osmosis pump 11, removes diameter greater than 5 microns particle; Medicine system 8 adds sodium hydroxide solution in water, regulate pH value to alkalescence, adds the Scale inhibitors of 1.0ppm subsequently again, produces fouling with the materials such as a small amount of Ca, Mg that prevent to reveal in the former water pretreatment in the dense water side of film; Water after regulating pH value and adding Scale inhibitors is sent into high desalination high yield water rate reverse osmosis system 9 via 7 pressurizations of reverse osmosis high-pressure pump and is carried out desalination, product water that finally comes out and dense water, and producing the water rate of recovery is about 85%.
Embodiment 3
With embodiment 2, wherein ion exchange softening system 4 selects the softening bed of secondary individual layer non diffusible ion exchange for use, adopts the soda-lime softening process to remove hardness in the lime melded system, and the Scale inhibitors of adding is 0.5ppm, and producing the water rate of recovery is about 85%.
High desalination high yield water rate reverse osmosis water treating equipment of the present invention, comprise raw water pump 2, depth filtration systems 3, this system selects more medium filter for use, ion exchange softening system 4, this system selects fixedly Hydrogen ion exchange softening bed of one-level individual layer for use, degas system 5, and degas system is selected degassing tower for use, decarburization water tank 6, reverse osmosis high-pressure pump 7, medicine system 8, high desalination high yield water rate reverse osmosis system 9.Method of the present invention comprises that former water is municipal wastewater, former water is sent into depth filtration systems 3 by raw water pump 2 filter out impurity such as fine particle in the water, suspended substance, colloid, organism; Water after filtering enters ion exchange softening system 4, removes hardness and basicity, comprises that some influence the high-valence cationic of the indissoluble of reverse osmosis, as iron, aluminium, barium, strontium etc.; Enter degas system 5 through remollescent water, adopt the air blast mode to slough carbon dioxide; Water after the decarburization enters decarburization water tank 6, and medicine system 8 adds sodium hydroxide solution in water, regulates pH value to alkalescence; Water through regulating pH value is sent into high desalination high yield water rate reverse osmosis system 9 via 7 pressurizations of reverse osmosis high-pressure pump and is carried out desalination, and product water that finally comes out and dense water, producing water ratio are about 80%.
High desalination high yield water rate reverse osmosis water treating equipment of the present invention, comprise raw water pump 2, depth filtration systems 3, this system selects more medium filter for use, ion exchange softening system 4, this system select one-level individual layer fixed sodium ion exchange bed, reverse osmosis high-pressure pump 7 for use, medicine system 8, high desalination high yield water rate reverse osmosis system 9.Method of the present invention comprises that former water is reservoir water, former water is sent into depth filtration systems 3 by raw water pump 2 filter out impurity such as fine particle in the water, suspended substance, colloid, organism; Water after filtering enters ion exchange softening system 4, removes hardness, comprises that some influence the high-valence cationic of the indissoluble of reverse osmosis, as iron, aluminium, barium, strontium etc.; Medicine system 8 adds sodium hydroxide solution in water, regulate pH value to alkalescence, add the Scale inhibitors of 1.0ppm subsequently again, send into high desalination high yield water rate reverse osmosis system 9 via 7 pressurizations of reverse osmosis high-pressure pump and carry out desalination, product water that finally comes out and dense water, producing water ratio are about 75%.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician in this field is in technical scope disclosed by the invention; any variation or the replacement carried out all should be included within protection scope of the present invention.
Claims (10)
1. a high desalination high yield water rate reverse osmosis water treatment method comprises former water pretreatment, and water forms feed water by reverse osmosis and carries out reverse-osmosis treated after the pre-treatment, obtains to produce water and dense water, and the pre-treatment that it is characterized in that former water comprises carries out Depth Filtration to former water; Filtration back water is sent into the ion exchange softening system and is softened processing, removes hardness; Water after the processing adds sodium hydroxide solution and carries out the pH value adjusting, is adjusted to alkalescence, forms feed water by reverse osmosis; Feed water by reverse osmosis is sent in the high desalination high yield water rate reverse osmosis system after by the supercharging of reverse osmosis high-pressure pump and is carried out desalination then, regulates high desalination high yield water rate reverse osmosis system and makes the reverse osmosis rate of recovery be controlled at 75-90%.
2. high desalination high yield water rate reverse osmosis water treatment method according to claim 1, when it is characterized in that raw water turbidity is higher, elder generation is with former water coagulation clarification filtration before described Depth Filtration; Described Depth Filtration can adopt more medium filter or high-efficiency fiber filter to filter.
3. high desalination high yield water rate reverse osmosis water treatment method according to claim 1 and 2 is characterized in that described softening processing employing ion exchange softening technology, and described softening process is that one-level is softening or secondary is softening; But fixed bed or floating bed; But individual layer bed or double bunk;
Before ion exchange softening technology is adopted in described softening processing, can carry out softening in advance earlier with lime softening process or soda-lime softening process.
4. high desalination high yield water rate reverse osmosis water treatment method according to claim 3 is characterized in that described ion exchange softening technology can adopt sodium ion exchange softening process, or/and adopt Hydrogen cationic exchange softening process.
5. high desalination high yield water rate reverse osmosis water treatment method according to claim 4 is characterized in that the described softening water that contains after the Hydrogen ion exchange softening is handled carries out carbonization treatment through decarbonization process such as air blast or gas separation membranes, sloughs carbonic acid gas.
6. high desalination high yield water rate reverse osmosis water treatment method according to claim 1 is characterized in that available feed water by reverse osmosis pump is sent water into 5 microns accurate filters before feed water by reverse osmosis enters the reverse osmosis high-pressure pump, with the particle of removal diameter greater than 5 microns.
7. high desalination high yield water rate reverse osmosis water treatment method according to claim 1 is characterized in that adding earlier the extremely low Scale inhibitors of measuring, the amount≤1.5ppm of Scale inhibitors before described feed water by reverse osmosis enters the reverse osmosis high-pressure pump.
8. high desalination high yield water rate reverse osmosis water treatment method according to claim 7 is characterized in that the preferred 0.5-1ppm of amount of described Scale inhibitors.
9. high desalination high yield water rate reverse osmosis water treating equipment, comprise raw water pump, depth filtration systems, the ion exchange softening system, medicine system, reverse osmosis high-pressure pump, high desalination high yield water rate reverse osmosis system, it is characterized in that described ion exchange softening system is can be for one-level softening or secondary is softening, can be fixed bed or floating bed, can be individual layer bed or double bunk; Depth filtration systems is more medium filter or high-efficiency fiber filter.
10. according to the high desalination high yield water rate reverse osmosis water treating equipment of claim 9, when it is characterized in that raw water turbidity is higher, can before described depth filtration systems, add a coagulation clarification filtering system; When original water hardness is higher, before depth filtration systems, can adopt the lime melded system pre-softening to intaking; Before the reverse osmosis high-pressure pump, also can add feed water by reverse osmosis pump and 5 microns accurate filters; Described ion exchange softening system can be sodium ion exchange melded system or/and Hydrogen cationic exchange melded system, when adopting Hydrogen cationic exchange melded system, can after melded system, add degas system, softening water is carried out carbonization treatment, and described degas system comprises degassing tower or degassing film device.
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| CN102807296A (en) * | 2012-08-30 | 2012-12-05 | 北京鑫佰利科技发展有限公司 | Process for deeply treating and recycling high-salinity industrial waste water |
| CN102992516A (en) * | 2012-12-03 | 2013-03-27 | 北京国电富通科技发展有限责任公司 | Treatment system for high-salt organic waste water and process thereof |
| CN103496806A (en) * | 2013-10-15 | 2014-01-08 | 中国华电工程(集团)有限公司 | System and method for manufacturing demineralized water |
| CN103848514A (en) * | 2012-11-29 | 2014-06-11 | 上海乐泽环境工程有限公司 | High recovery rate and pollution resistance reverse osmosis membrane water treatment method |
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| CN104355450A (en) * | 2014-11-12 | 2015-02-18 | 赵文勇 | High-salinity wastewater grading recycling process |
| CN105800846A (en) * | 2014-12-31 | 2016-07-27 | 北京清大国华环境股份有限公司 | Method used for reverse osmosis concentrated water treatment and zero discharge, and apparatus thereof |
| CN106219820A (en) * | 2016-08-31 | 2016-12-14 | 江苏宏标科技有限公司 | A kind of for power plant's soft brush treatment desalinating process |
| CN108751523A (en) * | 2018-08-02 | 2018-11-06 | 北京沃特尔水技术股份有限公司 | High-salt wastewater is except firmly except silicon and concentration method and system |
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| CN102807296A (en) * | 2012-08-30 | 2012-12-05 | 北京鑫佰利科技发展有限公司 | Process for deeply treating and recycling high-salinity industrial waste water |
| CN103848514A (en) * | 2012-11-29 | 2014-06-11 | 上海乐泽环境工程有限公司 | High recovery rate and pollution resistance reverse osmosis membrane water treatment method |
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