CN102826679A - Seawater desalination dual water supply system in water-electricity cogeneration - Google Patents
Seawater desalination dual water supply system in water-electricity cogeneration Download PDFInfo
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- CN102826679A CN102826679A CN2012102909715A CN201210290971A CN102826679A CN 102826679 A CN102826679 A CN 102826679A CN 2012102909715 A CN2012102909715 A CN 2012102909715A CN 201210290971 A CN201210290971 A CN 201210290971A CN 102826679 A CN102826679 A CN 102826679A
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- water
- reverse osmosis
- seawater
- desalting
- seawater desalination
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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
- Y02A20/131—Reverse-osmosis
Abstract
The invention relates to the field of seawater desalination, and especially relates to a seawater desalination dual water supply system in water-electricity cogeneration. The invention mainly solves the technical problems that in the prior art, indexes for water quality required by municipal water are greatly different from those of industrial water in power plants; common desalinators are lack of professional operation and maintenance personnel; the operation cost for the desalinators is high; the cost of desalted water is higher than that of seawater desalination facilities in power plants. The system of the invention comprises a seawater pretreatment system (1), and is characterized in that the seawater pretreatment system (1) is orderly connected with a reverse osmosis seawater desalination system (2) and a fresh water tank (3) through pipelines; the fresh water tank is respectively connected with an industrial water pool (4), a secondary reverse osmosis and desalting system (5), and a mineralization sterilization system (6) through pipelines; the secondary reverse osmosis and desalting system and the mineralization sterilization system are respectively connected with a desalting water tank (7) and a municipal water pool (8) through pipelines.
Description
Technical field
The present invention relates to a kind of sea water desaltination field, especially relate to sea water desaltination different water supply system in a kind of water power coproduction.
Background technology
Along with the energetically support of China to the sea water desaltination industry development, sea water desaltination has progressively entered into the municipal water supply ranks.For coastal large size city and island, the reverse osmosis membrane desalination technology is with its stable service capacity, and system's guarantee has obtained increasing application reliably.
Because the coastal large power plant in short supply, newly-built of Freshwater resources is all considering to adopt desalination process to prepare required production of full factory and domestic water.Power plant construction sea water desaltination facility; Can utilize electric power plant circulating water to fetch water and need not to build in addition water intake facilities; The chemical operations staff that can utilize power plant and advanced production management experience are to guarantee the safe and stable operation of sea water desaltination facility, and these all are that common desalimtor is incomparable.
China has built up the sea water desaltination project of some amount at present, is respectively applied for water treatment of power plant or municipal water supply.But, in the supply power plant water,, realize that the water power coproduction is just at the early-stage to municipal water supply by power plant construction sea water desaltination facility.Add that power plant water and municipal water use also exist certain difference on water-quality guideline, conventional method for desalting seawater can't satisfy both requirements simultaneously.
Therefore, for good utilisation seawater resources more, solve the coastland and produce and the nervous situation of domestic water, reduce the desalination water cost, in power plant construction sea water desaltination facility, optimization process technology is supplied the municipal water use synchronously, the coproduction of realization water power.Chinese patent discloses a kind of coupling devices of using nuclear energy for sea water desalination and method (publication number: CN101049999) thereof; It delivers to vapour generator through the heat that produces in the small cores process heat reactor, and the saturation steam entering turbine of generation directly drives the reverse osmosis high-pressure pump and carries out reverse osmosis seawater desalting; The saturation steam that steam turbine last stage is discharged is introduced the distillation sea water desalting system and is carried out sea water desaltination; Raw material seawater gets into the distillation sea water desalting system; Its heat extraction section refrigerated sea water is delivered to the reverse osmosis high-pressure pump, delivers to reverse osmosis seawater desalination system after the pressurization, and r-o-product water gets into desalination water water storage tank or desalination water user, realizes supplying water in different qualities.But patent does not relate to concrete quality separation water-supply method; As water power co-production sea water desalination method; Mainly also have following problem: the municipal water use is bigger to index and power plant's process water difference of water quality requirement; Like mineral substance, bacterium etc., generally do not do requirement in power plant's Treatment of Industrial Water, but explicitly call in the life water index; Common desalimtor lacks the operation and the maintenance personnel of specialty, and production management does not have power plant's standard.Add that the commercial power expense is higher, cause desalimtor's working cost higher, the desalination water cost is higher than power plant's sea water desaltination facility, promotes operation and has certain difficulty.
Summary of the invention
The present invention provides sea water desaltination different water supply system in a kind of water power coproduction; It mainly is that solution existing in prior technology municipal water use is bigger to index and power plant's process water difference of water quality requirement; And common desalimtor lacks the operation and the maintenance personnel of specialty; Desalimtor's working cost is higher, and the desalination water cost is higher than the technical problem of power plant's sea water desaltination facility etc.
Above-mentioned technical problem of the present invention mainly is able to solve through following technical proposals:
Sea water desaltination different water supply system in a kind of water power coproduction of the present invention; Comprise the sea water preprocessing system; Described sea water preprocessing system connects reverse osmosis seawater desalination system, fresh-water tank successively through pipeline; Fresh-water tank connects industrial pond, two-pass reverse osmosis and desalting system, mineralising disinfection system respectively through pipeline, and two-pass reverse osmosis and desalting system, mineralising disinfection system connect sweet-water tank, municipal tanks respectively through pipeline.
The desalination process that utilizes above-mentioned quality separation water-supply method to carry out the water power coproduction can adopt existing sophisticated reverse osmosis membrane processing technology.Desalination water behind reverse osmosis seawater desalting gets into the one-level fresh-water tank and stores, as the water source of supplying water in different qualities.
Power plant's industrial water consumption is maximum, through the direct access industrial of fresh-water tank upflow tube pond.The seawater reverse osmosis permeable system can keep continuous operation, makes fresh-water tank be in high-end trim for a long time, and the overflow water outlet can flow into industrial pond certainly, reduces power consumption.
The boiler of power plant supplementary feed adopts sophisticated two-pass reverse osmosis to add ion exchange process, carries out deep desalting.Demineralization plant can be built the desalination workshop in addition and arrange.
The municipal administration domestic water is higher to water quality requirement, and reverse osmosis produced water does not contain chlorine residue and omit slant acidity, reaches country of the People's Republic of China domestic water standard for making water quality, and desalination water is carried out aftertreatment.In desalination water, add CO
2And calcium hydroxide, thereby the basicity and the hardness of regulating reverse osmosis produced water, appropriateness improves the pH value, makes the product water after the processing can not cause corrosion to hydraulic pipe.Desalination water adds chlorine dioxide bactericide in carrying, to keep the pipe network water supply hygienic requirements.
Seawater desalination system scale and different water supply system scale can be carried out appropriate design according to the project actual demand.Because system is without the duplicate construction water intake facilities; Make full use of the waste heat of power plant simultaneously, build the realization scale effect jointly, make whole sea water desaltination facility specific investment and operation energy consumption reduce; Water producing cost will be significantly less than common desalimtor, have good social benefit and economic benefit.
As preferably, add carbonic acid gas, calcium hydroxide and dioxide peroxide in the described mineralising disinfection system, carbonic acid gas and calcium hydroxide can generate Calcium hydrogen carbonate, prevent the corrosion to pipe network to improve the pH value that supplies water, and control hardness are below 450mg/L; Utilize that the characteristics of efficient sterilizing and the ability of killing the virus are used for disinfection of drinking water under good deodorizing of dioxide peroxide and decoloring ability, the lower concentration, the control chlorine residue >=0.1mg/L of water factory.
As preferably, described reverse osmosis seawater desalination system includes ultra-filtration equipment, seawater HPP, energy recycle device, topping-up pump, seawater reverse osmosis and passes through device.
As preferably, described two-pass reverse osmosis and desalting system include two-pass reverse osmosis device, cation exchanger, anion exchanger, mixed ion exchanger.
Therefore; The present invention is externally supplied water in the supply power plant water by power plant construction sea water desaltination facility, realizes water power coproduction truly; And according to each actual needs with water spot; Rational aftertreatment technology is set carries out supplying water in different qualities, when guaranteeing water demand, make full use of seawater resources.Utilize the resources advantage of power plant, reduce the desalination water water producing cost, effectively alleviate the nervous situation of coastland Freshwater resources.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention.
Component, position and numbering among the figure: sea water preprocessing system 1, reverse osmosis seawater desalination system 2, fresh-water tank 3, industrial pond 4, two-pass reverse osmosis and desalting system 5, mineralising disinfection system 6, sweet-water tank 7, municipal tanks 8.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically technical scheme of the present invention.
Embodiment 1: power plant's water of productive use amount is 550m
3/ h, the boiler feedwater water requirement is 350 m
3/ h, externally service discharge is 2500 m
3/ h, the total planned capacity of seawater desalination system is 3400 m
3/ h.
Sea water desaltination different water supply system in a kind of water power coproduction of this example; Like Fig. 1; Comprise sea water preprocessing system 1; The sea water preprocessing system connects reverse osmosis seawater desalination system 2, fresh-water tank 3 successively through pipeline, and fresh-water tank connects industrial pond 4, two-pass reverse osmosis and desalting system 5, mineralising disinfection system 6 respectively through pipeline, and two-pass reverse osmosis and desalting system, mineralising disinfection system connect sweet-water tank 7, municipal tanks 8 respectively through pipeline.Add carbonic acid gas, calcium hydroxide and dioxide peroxide in the mineralising disinfection system, improve the pH value that supplies water, control hardness below 450mg/L, chlorine residue 0.1mg/L.Reverse osmosis seawater desalination system includes ultra-filtration equipment, seawater HPP, energy recycle device, topping-up pump, seawater reverse osmosis and passes through device.Two-pass reverse osmosis and desalting system include two-pass reverse osmosis device, cation exchanger, anion exchanger, mixed ion exchanger.
During use, the seawater after power plant's preheating gets into sea water preprocessing system 1 and carries out the coagulation clarification processing, and clear water gets into seawater reverse osmosis and passes through desalting system 2, and the desalination water behind desalination gets into fresh-water tank 3.First via desalination water is produced auxiliary water from flowing into power plant's industrial pond 4 supply power plant; The second road desalination water is delivered to two-pass reverse osmosis and desalting system 5 through water pump, and de-mineralized water is stored in sweet-water tank 7 supply boiler of power plant supplementary feed; The Third Road desalination water is delivered to municipal tanks 8 through water pump, on transfer line, adds CO through mineralising disinfection system 6
2, calcium hydroxide and dioxide peroxide, the supply municipal water use.After utilizing residual heat of electric power plant, system's operating temperature is stabilized in more than 15 ℃, and it is 3kWh/ ton water that seawater reverse osmosis is passed through operation energy consumption, 4.63 yuan of/ton water of comprehensive cost.
Embodiment 2: power plant's water of productive use amount is 400m
3/ h, the boiler feedwater water requirement is 250 m
3/ h, externally service discharge is 350 m
3/ h, the total planned capacity of seawater desalination system is 1000 m
3/ h.
Sea water desaltination different water supply system in a kind of water power coproduction of this example; Like Fig. 1; Comprise sea water preprocessing system 1; The sea water preprocessing system connects reverse osmosis seawater desalination system 2, fresh-water tank 3 successively through pipeline, and fresh-water tank connects industrial pond 4, two-pass reverse osmosis and desalting system 5, mineralising disinfection system 6 respectively through pipeline, and two-pass reverse osmosis and desalting system, mineralising disinfection system connect sweet-water tank 7, municipal tanks 8 respectively through pipeline.Add carbonic acid gas, calcium hydroxide and dioxide peroxide in the mineralising disinfection system, improve the pH value that supplies water, control hardness below 450mg/L, chlorine residue 0.1mg/L.。Reverse osmosis seawater desalination system includes ultra-filtration equipment, seawater HPP, energy recycle device, topping-up pump, seawater reverse osmosis and passes through device.Two-pass reverse osmosis and desalting system include two-pass reverse osmosis device, cation exchanger, anion exchanger, mixed ion exchanger.
Seawater after power plant's preheating gets into sea water preprocessing system 1 and carries out the coagulation clarification processing, and clear water gets into reverse osmosis seawater desalination system 2, and the desalination water behind desalination gets into fresh-water tank 3.First via desalination water is produced auxiliary water from flowing into power plant's industrial pond 4 supply power plant; The second road desalination water is delivered to two-pass reverse osmosis and desalting system 5 through water pump, and de-mineralized water is stored in sweet-water tank 7 supply boiler of power plant supplementary feed; The Third Road desalination water is delivered to municipal tanks 8 through water pump, on transfer line, adds CO2, calcium hydroxide and dioxide peroxide through mineralising disinfection system 6, the supply municipal water use.After utilizing residual heat of electric power plant, system's operating temperature is stabilized in more than 18 ℃, and it is 2.78kWh/ ton water that seawater reverse osmosis is passed through operation energy consumption, 4.26 yuan of/ton water of comprehensive cost.
Comparative Examples: municipal desalimtor, externally service discharge is 500 m
3/ h, seawater desalination system capacity are 500 m
3/ h.
Adopt the reverse osmosis membrane desalination process to handle, desalination water directly inserts city planting ductwork after subsequent disposal.Owing to there is not thermal source, system's operating temperature fluctuation is bigger, can be low to moderate winter about 5 ℃, and seawater reverse osmosis is passed through operation energy consumption at 3.5 ~ 4.5kWh/ ton water, 5.38 yuan of/ton water of comprehensive cost.
The above is merely specific embodiment of the present invention, but constitutional features of the present invention is not limited thereto, and any those skilled in the art is in the field of the invention, and the variation of being done or modify all is encompassed among the claim of the present invention.
Claims (4)
1. sea water desaltination different water supply system in the water power coproduction; Comprise sea water preprocessing system (1); It is characterized in that described sea water preprocessing system (1) connects reverse osmosis seawater desalination system (2), fresh-water tank (3) successively through pipeline; Fresh-water tank connects industrial pond (4), two-pass reverse osmosis and desalting system (5), mineralising disinfection system (6) respectively through pipeline, and two-pass reverse osmosis and desalting system, mineralising disinfection system connect sweet-water tank (7), municipal tanks (8) respectively through pipeline.
2. sea water desaltination different water supply system in a kind of water power coproduction according to claim 1; It is characterized in that adding carbonic acid gas, calcium hydroxide and dioxide peroxide in the described mineralising disinfection system (6); Improve the pH value that supplies water, control hardness below 450mg/L, chlorine residue 0.1mg/L.
3. sea water desaltination different water supply system in a kind of water power coproduction according to claim 1 is characterized in that described reverse osmosis seawater desalination system (2) includes ultra-filtration equipment, seawater HPP, energy recycle device, topping-up pump, seawater reverse osmosis and passes through device.
4. sea water desaltination different water supply system in a kind of water power coproduction according to claim 1 is characterized in that described two-pass reverse osmosis and desalting system (5) include two-pass reverse osmosis device, cation exchanger, anion exchanger, mixed ion exchanger.
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| CN2012102909715A CN102826679A (en) | 2012-08-16 | 2012-08-16 | Seawater desalination dual water supply system in water-electricity cogeneration |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496060A (en) * | 2015-01-09 | 2015-04-08 | 刘华军 | Seawater desalination and comprehensive utilization process and system |
| CN105668857A (en) * | 2016-03-08 | 2016-06-15 | 碧海舟（北京）节能环保装备有限公司 | Mineralization system for desalinated seawater |
| CN107215979A (en) * | 2017-06-02 | 2017-09-29 | 青岛百发海水淡化有限公司 | A kind of method for desalting seawater |
| CN112551752A (en) * | 2020-12-10 | 2021-03-26 | 山东核电有限公司 | Water heat simultaneous transfer system based on reverse osmosis sea water desalination and nuclear energy heat supply |
| CN115259281A (en) * | 2022-07-22 | 2022-11-01 | 中国核电工程有限公司 | Resin regeneration wastewater recycling system of demineralized water production system |
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| CN1295979A (en) * | 2000-03-31 | 2001-05-23 | 何敬东 | Implement for sea water desalination utilizing waste heat of electricity generating plant |
| WO2011149626A1 (en) * | 2010-05-25 | 2011-12-01 | General Electric Company | Pressure vessel for sea water reverse osmosis and process that avoids scaling problems |
| CN102583857A (en) * | 2012-02-07 | 2012-07-18 | 绍兴文理学院 | Electrical fresh water co-production device for coastal thermal power plant and island thermal power plant |
| CN202729925U (en) * | 2012-08-16 | 2013-02-13 | 浙江东发环保工程有限公司 | Sea-water desalination and dual supply system for water-electricity co-production |
-
2012
- 2012-08-16 CN CN2012102909715A patent/CN102826679A/en active Pending
Patent Citations (4)
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| CN1295979A (en) * | 2000-03-31 | 2001-05-23 | 何敬东 | Implement for sea water desalination utilizing waste heat of electricity generating plant |
| WO2011149626A1 (en) * | 2010-05-25 | 2011-12-01 | General Electric Company | Pressure vessel for sea water reverse osmosis and process that avoids scaling problems |
| CN102583857A (en) * | 2012-02-07 | 2012-07-18 | 绍兴文理学院 | Electrical fresh water co-production device for coastal thermal power plant and island thermal power plant |
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Non-Patent Citations (3)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496060A (en) * | 2015-01-09 | 2015-04-08 | 刘华军 | Seawater desalination and comprehensive utilization process and system |
| CN105668857A (en) * | 2016-03-08 | 2016-06-15 | 碧海舟（北京）节能环保装备有限公司 | Mineralization system for desalinated seawater |
| CN107215979A (en) * | 2017-06-02 | 2017-09-29 | 青岛百发海水淡化有限公司 | A kind of method for desalting seawater |
| CN112551752A (en) * | 2020-12-10 | 2021-03-26 | 山东核电有限公司 | Water heat simultaneous transfer system based on reverse osmosis sea water desalination and nuclear energy heat supply |
| CN115259281A (en) * | 2022-07-22 | 2022-11-01 | 中国核电工程有限公司 | Resin regeneration wastewater recycling system of demineralized water production system |
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Application publication date: 20121219 |