CN1962467B - Cyclic cooling water desalting method - Google Patents
Cyclic cooling water desalting method Download PDFInfo
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- CN1962467B CN1962467B CN200510117666A CN200510117666A CN1962467B CN 1962467 B CN1962467 B CN 1962467B CN 200510117666 A CN200510117666 A CN 200510117666A CN 200510117666 A CN200510117666 A CN 200510117666A CN 1962467 B CN1962467 B CN 1962467B
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- 239000000498 cooling water Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 39
- 125000004122 cyclic group Chemical group 0.000 title description 5
- 238000011033 desalting Methods 0.000 title description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 238000001816 cooling Methods 0.000 claims abstract description 42
- 230000007797 corrosion Effects 0.000 claims abstract description 23
- 238000005260 corrosion Methods 0.000 claims abstract description 23
- 150000003839 salts Chemical class 0.000 claims abstract description 20
- 238000004821 distillation Methods 0.000 claims description 42
- 239000012528 membrane Substances 0.000 claims description 27
- 238000012546 transfer Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 12
- 238000010612 desalination reaction Methods 0.000 claims description 11
- 239000012267 brine Substances 0.000 claims description 8
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 8
- 239000012141 concentrate Substances 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 238000003113 dilution method Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 17
- 230000002401 inhibitory effect Effects 0.000 abstract description 13
- 239000008235 industrial water Substances 0.000 abstract description 4
- 230000001502 supplementing effect Effects 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 21
- 238000012545 processing Methods 0.000 description 11
- 238000001704 evaporation Methods 0.000 description 10
- 230000008020 evaporation Effects 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 230000003134 recirculating effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003020 moisturizing effect Effects 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005111 flow chemistry technique Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Separation Using Semi-Permeable Membranes (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a salt removing method of circulating cooling water in the industrial water disposing domain, which is characterized by the following: adopting film distilling technique; maintaining stable temperature difference on two sides of film distiller film through corrosion resistant industrial heat exchanger and cooling tower; finishing salt removing course for circulated water; returning low-density salt water on the film distiller side to cooling tower; realizing low salt density operation of circulating cool water; supplementing system evaporated loss and film distiller discharge water content; reducing water supplementing and effluent draining quantity greatly until canceling the inhibiting antisludging agent; changing the operation and disposing pattern of present industrial circulating cooling water completely.
Description
One, technical field
The present invention proposes a kind of cyclic cooling water desalting method, belongs to the Treatment of Industrial Water field.The present invention adopts film distillation technology, utilizes the heat exchange of anticorrosion industry heat exchanger and cooling tower to keep the stable temperature difference of film distiller film both sides, finishes the desalination processes of recirculated water.Film distiller cold side low concentration recirculated water is returned the cooling tower circulation, realize the low salt concn operation of recirculated cooling water, circulating cooling make-up water just remedies the evaporation loss of system and the strong brine amount of film distiller discharging.This method can significantly reduce circulating cooling make-up water and water amount of blowdown, reduces the use until the cancellation corrosion inhibiting and descaling agent, thoroughly changes the operation and the processing mode of existing industrial circulating cooling water.
Two, background technology
The industrial colling total amount accounts for more than 60% of water for industrial use total amount, and therefore, in today of water resource growing tension, the processing method of recirculated cooling water becomes the key of water saving.Recirculating cooling water system mainly is made up of cooling tower, heat transmission equipment, water circulating pump.Recirculated water is finished heat exchange and cooling procedure in system.In cyclic process,, and in the water evaporation, also form so-called water yield evaporation loss because recirculated water is taken away heat by evaporation of water; And be accompanied by wind and leakage loss.For keeping certain recirculated water water yield, water quality balance and improve the utilization rate of water, circulation need be carried out continuous moisturizing, blowdown and be added a certain amount of corrosion inhibiting and descaling agent.In the above-mentioned various water losses of recirculated water, have only blowdown to reduce.Therefore, only manage to reduce the purpose that blowdown flow rate just can reach water saving.For this reason, adopt the method for the cycles of concentration that improves recirculated water to reach this purpose both at home and abroad mostly.Mainly show to adopt and be provided with on the methods such as being back to circulation after other filtering system, the sewage disposal, wherein the most frequently used method is to improve cycles of concentration by the mode that adds scale inhibition, corrosion inhibiter in water, has also polluted environment but the use of a large amount of antisludging agents has both increased cost.(all this provinces, " Treatment of Industrial Water ", Nanjing University of Chemical Technology, 2000).
The film distiller that adopts among the present invention is that a kind of dewatering microporous film that adopts is the film separation process of mass transfer driving force with film both sides steam pressure difference, for example when the aqueous solution of different temperatures is separated by dewatering microporous film, because the hydrophobicity of film, the aqueous solution of both sides all can not see through fenestra and advance people's opposite side, but because the water vapor pressure of hot side aqueous solution membrane interface is higher than cold side, water vapour will see through fenestra and advance people's cold side and condensation from hot side, evaporation during this distills with routine, mass transfer, condensation process is quite similar, so be called the film still-process (Membrane Distillation, MD).
Though just begun to study than the film distillation of system as far back as the sixties in 20th century, but at that time owing to be subjected to the restriction of technical conditions, the efficient of film distillation is not high, following period of time subsequently some have also occurred this technology has been carried out improved patent, but Separation Research person is devoted to counter-infiltration at this caudacoria, ultrafiltration, membrane technologies such as micro-filtration solve water treatment problems, film distillation never causing enough attention of people, up to early 1980s since macromolecular material and filming technology aspect develop rapidly, film distillation demonstrates its practical potentiality, over more than 20 year to the constantly dark people of this new membrane SEPARATING PROCESS.About the application and the progress of film distillation technology, can be with reference to pertinent literature (1. film distillation technology and application study thereof make progress, " membrane science and technology " the 23rd volume the 4th phase pp67～92).
It almost is to carry out under normal pressure that film distillation technology has following advantage (1) film still-process, and equipment is simple, easy to operate, and the possibility of realization is also arranged in the weak area of technical force; (2) in the film still-process of the non-volatile solute aqueous solution,,, be expected to become the effective means of extensive, low-cost preparation ultra-pure water so distillate is very pure because have only water vapour can see through fenestra; (3) this process can be handled the aqueous solution of high concentration, if solute is the material of easy crystallization, can occur film distillation crystalline polamer to solution concentration to hypersaturated state, is the present unique membrane process that can directly isolate crystallized product from solution; (4) need not solution is heated to boiling point in this process, as long as the suitable temperature difference is kept in the film both sides, this process just can be carried out, and might utilize the waste heat of solar energy, underground heat, hot spring, factory and the warm cheap energy such as industrial degree water.
But the film distillation is a membrane process that phase transformation is arranged, the latent heat of vaporization has reduced the utilization rate of heat energy, so in the design of assembly, must consider the recovery of latent heat, to reduce heat energy loss as far as possible, and with the flexibility of small-sized membrane module formation large-scale production system efficiently, compare with other membrane process, film distillation just more has Practical significance having under the available situation of the cheap energy.
In scope known to the inventor, the innovation and creation that the film distillation are applied to the recirculated cooling water desalination are not all arranged at present at home and abroad.Recent decades, the research and development of film distillation application mainly concentrates on: as Chinese patent application 01801127.6,02138636.6,93104942.3,01106877.9.Wherein " processing method of a kind of recirculated cooling water and water at low temperature " (publication number: CN1448342) propose the bypass decontamination line is set in recirculating cooling water system, wherein adopt counter-infiltration as main blowdown means.Other has " a kind of by-pass flow processing method of industrial circulating cooling water " (publication number CN1522974A) openly to invent similarly to last, only proposes with ion-exchange as main recirculated cooling water blowdown means." processing method of recirculated cooling water " (Japan Patent JK 2003-121094) adheres to for the foundry loam of controlling in the open type recirculating cooling water system, by reducing dissolved oxygen concentration in the cooling water, microbial activity is reduced, make the foundry loam controlling agent act on SA microorganism again, thereby prevent that effectively foundry loam from adhering to.
At present, the treatment technology of existing industrial circulating cooling water is also just by adding corrosion inhibiting and descaling agent, the cycles of concentration that means such as other filter improve recirculated water being set, the raising of cycles of concentration means the raising of salt content in the water, the raising of salt content requires to add more corrosion inhibiting and descaling agent again, this is the problem of conflicting a, mutual restriction, and these technology can not reduce the salt content of recirculated cooling water.Shortcomings such as and reverse osmosis desalting technology has the processing cost height at present, and blowdown flow rate is big are unfavorable for the industrialization operation.So the shortcoming of prior art mainly shows: one, cost is too high.Power consumption, anti-incrustation corrosion inhibitor have constituted the processing cost of great number; Two, the waste of the energy.A large amount of used heat of containing in the industrial circulating cooling water enter environment, cause the serious waste of the energy; Three, problem of environmental pollution.Contain a certain amount of organic salt corrosion inhibiting and descaling agent in the industrial circulating cooling water sewer and enter natural water, must cause certain pollution environment.Proposition of the present invention can overcome the existing existing all deficiencies of process.
Three, summary of the invention
The present invention proposes a kind of film that utilizes and distills the cyclic cooling water desalting technology, is example with existing open type circulation cooling tower cooling system, sets forth the principle of handling industrial circulating cooling water with film distillation technology.
The application of film distillation technology in recirculated cooling water is handled mainly is to increase film distillation treatment process on the basis in original water treatment, and original circulating cooling system is adjusted on a small quantity.
The heat-exchange system that original Water Treatment in Circulating Cooling System is mainly formed by cooling tower, with many group industrial heat exchange devices constitutes, certain one-level heat exchanger in original heat-exchange system is replaced by corrosion-resistant heat exchanger, utilize it and film distiller to constitute the film distillation hot water side circulatory system, heat exchanger is mainly used to improve the circulating water temperature of the hot side of film distiller.
In the cooling tower circulatory system, shunt one high warm water discharge (or low warm water discharge) delivery film distillation circulation through the recirculated water after the intensification of industrial heat exchange device, the high/low warm water discharge of this strand is equivalent to the sewer of original circulation, with the hot side that enters the film distiller after recirculated water that film distills the circulation of hot side mixes, utilize steam pressure difference that the temperature difference of the microporous hydrophobic membrane both sides in the film distiller forms as driving force, water vapour is reached cold side by hot side, continuing circulation after hot side recirculated water after the cooling heats up by corrosion-resistant industrial heat exchange device concentrates. and the recirculated water of film distiller cold side is provided by the recirculated water shunting after cooling tower is lowered the temperature in the cooling tower circulation, and the heat transfer by the film distiller, mass transfer function absorbs water vapour and latent heat thereof, be circulated to the cooling tower cooling then, in this circulation, finished dilution to recirculated water. film distills hot side recirculated water and finishes heat transfer, behind the mass transfer, salinity significantly improves in the water, under the situation that does not influence the film distillating ventilating amount, can keep the high salt concentration circulation, only when flux drops to a certain degree, just carry out the intermittent discharge of high strong brine.
Described film distiller can adopt a plurality of small-sized film distillers to carry out parallel connection, tandem compound, to reach the requirement of recirculated water high concentration multiple operation.
The industrial heat exchange device of described industrial cooling tower circulation can adopt a plurality of industrial heat exchange device series, parallel compound modes.
The used film distiller of the present invention can adopt direct contact membranes distillation, vacuum membrane distillation, air-gap film distillation film distillation type.
The hot side of described film distiller and the circulatory mediator of cold side can adopt cross-flow or and the fluidised form mode is conducted heat, mass transfer.
Described cooling tower circulation can also can be uncovered circulation for sealing and circulating.
Utilize film distillation technology to handle industrial circulating cooling water, can realize following target:
1, rate of water make-up, water amount of blowdown decline to a great extent
Theoretically, film distills recyclable 100% water, but in actual motion, when reaching finite concentration, continues salt to concentrate water saving has been become meaningless, in this technology, circulation is directly blowdown not, blowdown is discharged indirectly by distillation device, and distillation device can be kept very high concentration multiple operation, so the circulation amount of makeup water is very little.Only need the evaporation loss of replenishment system and the water yield of final blowdown in theory.The water amount of blowdown of system also can be kept high salt concentration operation and significantly reduction because film distills hot side.
2, reduction even cancellation inhibition, antisludging agent are avoided the pollution of recirculated water blowdown to environment
The method that improves recirculated water cycles of concentration minimizing blowdown at present is: add corrosion inhibiting and descaling agent in recirculated water.And corrosion inhibiting and descaling agent is some organic salts basically, and these salts enter natural water with the recirculated water blowdown, and environment has been caused certain pollution.In this technology, the film distiller cold side recirculated water that has absorbed water vapour (pure water) is back to the cooling tower circulation, recirculated water to the cooling tower circulation constantly dilutes, membrane area by design film distiller, can keep this recirculated water moves under low salt concn, fundamentally solve the problem of salt, thereby can reduce even fully phase out the use of inhibition, antisludging agent.Eliminate the pollution that corrosion inhibiting and descaling agent brings to environment.
3, used heat utilization reduces film distillation processing cost
The operating cost of film distillation mainly is on thermal source, and the film distiller mainly utilizes the waste heat source of industrial heat exchange device in this technology, has significantly reduced processing cost.
In a word, technology with film distillation processing industrial circulating cooling water is from making full use of system's used heat, reducing the angle of fetching water, reduce sewer (object of the ready-made monitoring of attaching most importance to of some sewer), minimizing or cancellation corrosion inhibiting and descaling agent etc., fundamentally use, the processing mode of the existing industrial circulating cooling water of change.
The method that the present invention is proposed further specifies in conjunction with the accompanying drawings.
In the accompanying drawing, A, B, C, D represent film distiller, corrosion-resistant industrial heat exchange device, industrial heat exchange device, cooling tower respectively; 1,2,3,4,5,6 represents high warm water discharge, low warm water discharge, industrial water intaking, evaporation loss, blowdown strong brine, processing medium respectively; R-CT is the cooling tower circulation in the heavy line of right side, and the left side is film distillation circulation than R-MD in the fine line circle; Short dash line means many group industrial heat exchange devices, and long dotted line means selectable flowing line; Fine line, heavy line and arrow thereof are represented current and direction.
Application example one: the application in the recirculated cooling water of thermal power plant.
By the recirculated water cooling from the cooling column pond, steam condenses into water to the steam discharge of big-and-middle-sized thermal power plant condensing turbine, emits the heat of condensation in condenser.This heat is taken away by the recirculated water of condenser.Circulating water temperature returns in the cooling column and cools off after improving, and a large amount of evaporation loss causes constantly concentrating of recirculated water, has only by a large amount of moisturizings and adds corrosion inhibiting and descaling agent and keep the certain cycles of concentration operation of recirculated water, causes the raising of processing cost.
Adopt recirculated water desalination method of the present invention, the condenser of afterbody condensing turbine is replaced by poly-tetrafluoro heat exchanger B, make B and film distiller A component film distillation circulation; Having obtained the high warm water discharge 1 of one water of circulation moisture of heat from other condenser C gives as film distillation circulation R-MD, the hot side that enters the film distiller; The recirculated water that has obtained heat from other condenser C also divides one cooling water to enter the cold side of film distiller A after cooling tower D cooling; Mass transfer, heat transfer are carried out in two bursts of water dewatering microporous film both sides in film distiller A, make the cold side water intensification and obtain no salt solution, behind the inflow cooling tower circulation R-CT, make recirculated cooling water obtain dilution; The water of the hot side of microporous barrier temperature after mass transfer, heat transfer reduces, and the water yield constantly reduces, and salinity increases, and can keep the normal flux of film distiller A by high warm water discharge 1 of supply and control blowdown strong brine 5.Realize the low salt concn and the high concentration multiple operation of recirculated cooling water, industry water intaking 3 just remedies the evaporation loss 4 of system and the strong brine amount of film distiller discharging.This method can significantly reduce water intaking and water amount of blowdown, reduces the use until the cancellation corrosion inhibiting and descaling agent, can change use, the processing mode of existing industrial circulating cooling water.
Application example two: the application in coking industry
Coking gasification plant blasting condensation circulation for 3 1400 coal gas primary cooler and 1 60X10kW refrigeration unit recirculated cooling water is provided, system possesses the about 400m of the water yield
2, the about 800m of quantity of circulating water
2/ h.This circulation is near coke oven, coal yard and Jiao Chang, and it is bigger influenced by dust.In addition, the additional water source of this section recirculated water is the seconary water use of coal mine deep well water reuse after the subcooler heat exchange, its temperature, hardness, turbidity etc. are all higher, change of water quality is big, cause pipeline and heat transmission equipment in the whole system serious fouling and corrosion to occur, seriously influenced the safety and stablization of producing.Adopt recirculated water desalination method of the present invention, the condenser of a coal gas primary cooler wherein is replaced by poly-tetrafluoro heat exchanger B, the distillation of B and film distiller A component film is circulated; Having obtained one high warm water discharge 1 of circulation moisture of heat from other condenser C gives as film distillation circulation R-MD, the hot side that enters the film distiller; The recirculated water that has obtained heat from other condenser C also divides one cooling water to enter the cold side of film distiller A after refrigeration unit D cooling; Mass transfer, heat transfer are carried out in two bursts of water dewatering microporous film both sides in film distiller A, make the cold side water intensification and obtain desalted water, behind the inflow cooling tower circulation R-CT, make recirculated cooling water obtain dilution; The water of the hot side of microporous barrier temperature after mass transfer, heat transfer reduces, and the water yield reduces, and salinity increases, and can keep the normal flux of film distiller A by high warm water discharge 1 of supply and control blowdown strong brine 5.Realize the low salt concn and the high concentration multiple operation of recirculated cooling water, industry water intaking 3 just remedies the evaporation loss 4 of system and the strong brine amount of film distiller discharging.This method can significantly reduce water intaking and water amount of blowdown, and the use of cancellation corrosion inhibiting and descaling agent can change the use, the processing mode that have industrial circulating cooling water now, satisfies production requirement and reduces production costs.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200510117666A CN1962467B (en) | 2005-11-09 | 2005-11-09 | Cyclic cooling water desalting method |
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| CN200510117666A CN1962467B (en) | 2005-11-09 | 2005-11-09 | Cyclic cooling water desalting method |
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| CN1962467A CN1962467A (en) | 2007-05-16 |
| CN1962467B true CN1962467B (en) | 2010-05-05 |
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| CN200510117666A Expired - Fee Related CN1962467B (en) | 2005-11-09 | 2005-11-09 | Cyclic cooling water desalting method |
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| CN101327407B (en) * | 2007-06-20 | 2012-04-18 | 天津工业大学 | A kind of liquid evaporation concentration equipment and method |
| US10584926B1 (en) * | 2013-12-19 | 2020-03-10 | National Technology & Engineering Solutions Of Sandia, Llc | System and method for cooling using a heat exchanger having a membrane |
| CN108477470B (en) * | 2018-05-15 | 2024-04-16 | 成都海科机械设备制造有限公司 | Tank type high-precision low-energy-consumption full-automatic desalination system and desalination method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0352627A (en) | 1989-07-19 | 1991-03-06 | Hitachi Ltd | Membrane distillation apparatus |
| CN1271333A (en) * | 1997-09-23 | 2000-10-25 | Hvr水净化股份公司 | Apparatus for obtaining pure water from crude water |
| CN1396120A (en) * | 2001-07-13 | 2003-02-12 | 清华大学 | Membrane distillation type water treating apparatus using solar energy or afterheat |
| WO2005089914A1 (en) * | 2004-03-19 | 2005-09-29 | Wolfgang Heinzl | Method and device for distilling solutions using a membrane |
-
2005
- 2005-11-09 CN CN200510117666A patent/CN1962467B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0352627A (en) | 1989-07-19 | 1991-03-06 | Hitachi Ltd | Membrane distillation apparatus |
| CN1271333A (en) * | 1997-09-23 | 2000-10-25 | Hvr水净化股份公司 | Apparatus for obtaining pure water from crude water |
| CN1396120A (en) * | 2001-07-13 | 2003-02-12 | 清华大学 | Membrane distillation type water treating apparatus using solar energy or afterheat |
| WO2005089914A1 (en) * | 2004-03-19 | 2005-09-29 | Wolfgang Heinzl | Method and device for distilling solutions using a membrane |
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