CN105540958A - Zero-discharge treatment process of power plant wastewater - Google Patents
Zero-discharge treatment process of power plant wastewater Download PDFInfo
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
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- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/46115—Electrolytic cell with membranes or diaphragms
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
The invention discloses a zero-discharge treatment process of power plant wastewater, and belongs to the technical field of wastewater treatment. The process includes the specific steps that the discharged wastewater of circulating water generated by a power plant circulating water system is pretreated, the pretreated wastewater is subjected to reverse osmosis (RO) treatment to be separated into fresh water and high-salinity water, the high-salinity water is delivered into a desulphurization system to be recycled as supplementary water, crude salt is added into desulphurization wastewater generated by the desulphurization system to obtain saturated salt water, the saturated salt water is subjected to chemical refining and impurity removing to obtain pure saturated salt water, the pure saturated salt water is subjected to salt water refining to obtain high-purity saturated salt water, and the high-purity saturated salt water is subjected to electrolysis to obtain hydrogen, chlorine and a sodium hydroxide solution. By means of the process, the problem that high-salinity wastewater and desulphurization wastewater are discharged is solved, the treating cost is lowered, and the wastewater is fully utilized.
Description
Technical field
The present invention relates to technical field of waste water processing, especially a kind of power plant effluent Zero-discharge treating process.
Background technology
At present, the cogeneration units of Chinese large-sized mostly is the wet type cooling unit (300MW grade) being positioned at Outskirts of City, power plant water source used is municipal middle water, although municipal middle water is through process, meet the water quality requirement at power plant water source, but, because the saltiness in its water is higher, power plant is caused to have discharge of wastewater, for the cogeneration units of conventional 350MW, the quantity discharged of high-salt wastewater reaches about 300t/h, although this effluent part is called clean lower water, but drain into sewage work, do not meet it and accept large saltiness standard, directly drain into water body, be difficult to again pass through environmental impact assessment.
In addition, due to the raising of cinder of electric power plant comprehensive utilization degree, desulfurization wastewater discharges nowhere, and the pollution factor of this waste water is heavy metal, salt grades, and directly drains into water body, contaminate environment.Be necessary to carry out innoxious and recycling treatment to it.
The discharge of power plant's high-salt wastewater and desulfurization wastewater, not only increases expense and the effluent charge of the water resources of power plant, and brings inconvenience to establishing and running of engineering.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of power plant effluent Zero-discharge treating process, solve the emission problem of high-salt wastewater and desulfurization wastewater, reduce processing cost, and waste water is fully used.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of power plant effluent Zero-discharge treating process, the waste discharge of recirculated water electric power plant circulating water system produced carries out pre-treatment, pretreated waste water is divided into fresh water and haline water through RO reverse-osmosis treated, haline water as a supplement water delivers to recycling in desulphurization system, crude salt is added in the desulfurization wastewater that desulphurization system produces, obtain saturated brine and chemical refining is carried out to saturated brine, remove impurity and obtain saturated pure salt solution, pure salt solution is through salt refining, obtain saturated high-purity salt solution, electrolysis is carried out to high-purity salt solution and obtains hydrogen, chlorine and sodium hydroxide solution.
The further improvement of technical solution of the present invention is: concrete steps are,
A, pre-treatment
The waste discharge of recirculated water electric power plant circulating water system produced sends into coagulation basin, coagulating agent is added and coagulant aids carries out coagulating treatment in coagulation basin, flocculation basin is sent into again after the waste water filtering of coagulating treatment, in flocculation basin, add flocculation agent carry out flocculation treatment, after the waste water filtering after flocculation treatment, enter step b;
B, RO reverse osmosis
Pretreated waste water enters reverse osmosis unit, and the waste water through RO reverse-osmosis treated is divided into fresh water and haline water, and haline water enters step c;
C, enter desulphurization system
The haline water produced in step b is delivered to desulphurization system Water Sproading utilization as a supplement, the desulfurization wastewater that desulphurization system produces enters steps d;
D, interpolation crude salt
The desulfurization wastewater produced in step c enters reaction tank and add crude salt in reaction tank, obtains saturated brine;
E, chemical refining
In saturated brine, add chemical agent carry out chemical refining process, remove calcium, magnesium, silicon, heavy metal, the sulfate radical in saturated brine, obtain saturated pure salt solution;
F, salt refining
Pure salt solution in step e is filtered, regulates the pH value of pure salt solution, add resin absorption calcium ion and magnesium ion, obtain saturated high-purity salt solution;
G, electrolysis
High-purity salt solution in step f is carried out electrolysis, obtains hydrogen, chlorine and sodium hydroxide solution.
The further improvement of technical solution of the present invention is: the coagulating agent in described step a is the wherein one of polymeric iron, polymeric aluminum, and described coagulant aids is lime, and described flocculation agent is polyacrylamide.
The further improvement of technical solution of the present invention is: the fresh water in described step b is delivered to Boiler water Feeding System workshop and is supplemented to steam-water circulation system.
The further improvement of technical solution of the present invention is: in described steps d, desulfurization wastewater increased sea-water reverse osmose treatment step before entering reaction tank, obtain fresh water and concentrated desulfurization wastewater, concentrated desulfurization wastewater enters reaction tank, the crude salt added in described steps d is crude macrogranule salt, and main component is sodium-chlor.
The further improvement of technical solution of the present invention is: in described step e chemical agent be white lime, sodium hydroxide, sodium carbonate, organosulfur, iron(ic) chloride, polyacrylamide, hydrochloric acid, ion isolation water purification agent one or more.
The further improvement of technical solution of the present invention is: in described step f, the pH value of pure salt solution is 6 ~ 9, and resin model is D403.
The further improvement of technical solution of the present invention is: the electrolyzer in described step g is ion-exchange membrane electrolyzer, and electrolysis voltage is 2.19 ~ 4.19V, and electrolytic current density is 1.0 ~ 5.0kA/ square metre.
The further improvement of technical solution of the present invention is: described sodium hydroxide solution obtains sodium hydroxide crystal through evaporative crystallization, sodium hydroxide reaches the quality standard of technical grade sodium hydroxide after washing and drying, described hydrogen, chlorine purification processes reach the quality standard of commercial-grade hydrogen and chlorine, hydrogen and chlorine are passed in synthetic furnace carry out synthesis obtain hydrogenchloride recycle.
Owing to have employed technique scheme, the technical progress that the present invention obtains is:
The present invention is by carrying out pre-treatment by waste water, the waste water processed is divided into fresh water and haline water through RO reverse osmosis, fresh water is recycled, decrease the expense of the water resources of power plant, haline water delivers to desulphurization system recycling as the make up water of desulphurization system, save desulphurization system water, the desulfurization wastewater that desulphurization system produces adds crude salt and obtains pure salt solution through chemical refining method removal impurity, pure salt solution obtains high-purity salt solution after salt refining process, and high-purity salt solution carries out electrolysis and obtains the recycling of hydrogen, chlorine and sodium hydroxide solution.Technique is simple, and treatment effect is good, and input cost is low.
Pre-treatment step of the present invention mainly processes the suspended substance in waste water, part calcium ion and the pollution factor such as part magnesium ion, partial organic substances, COD, BOD.Pretreated waste water is mainly divided into the process of fresh water and haline water by RO reverse osmosis step of the present invention, and fresh water is delivered to Boiler water Feeding System workshop and is supplemented to steam-water circulation system, and haline water continues process.Haline water enters in desulphurization system, can utilize by Water Sproading as a supplement.In desulfurization wastewater, add crude salt, be to obtain saturated brine, for follow-up electrolysis step is prepared.Chemical refining step of the present invention mainly removes the foreign ion such as most calcium, magnesium, heavy metal, silicon, sulfate radical in waste water.Salt refining step of the present invention mainly processes the suspended substance in waste water, remaining calcium ion and magnesium ion, finally obtains high salt pure water.Electrolysis step of the present invention is specially to be delivered to ion-exchange membrane electrolyzer by saturated sodium chloride solution and carries out electrolysis, and control electrolysis voltage and electrolytic current density, electrolysis obtains hydrogen, chlorine and sodium hydroxide solution.
Deal with the emission problem of high-salt wastewater and desulfurization wastewater by a series of, finally obtain chlorine, hydrogen and sodium hydroxide simultaneously.A sodium hydroxide part is used for the removal of the calcium ions and magnesium ions in power plant effluent pre-treatment as water treatment agent, a part carry out concentrated after sell; The hydrogen that electrolysis generates, a part be used for power plant with hydrogen, redundance removal of impurities is outer after purifying sells; The chlorine that electrolysis generates, a part adds to circulating water system, and for suppressing growing of microorganism in circulating water system, redundance removal of impurities is outer after purifying sells.Also the hydrogen of production and chlorine can be synthesized in synthetic furnace, the hydrogenchloride produced, as the water treatment agent in factory, can sell outside redundance.Turned waste into wealth by waste water and be fully used, this technique is applicable to the treatment system of whole power plant effluent, and be also applicable to the Industrial Wastewater Treatment that other saltiness are high, use range is wide.
Increase by a step seawater reverse osmosis membrane process after desulfurization wastewater enters reaction tank, before interpolation crude salt, fresh water is recycled, and also makes the concentration of the sodium-chlor of high-purity salt solution promote further, reduces the amount of follow-up interpolation sodium-chlor.
Accompanying drawing explanation
Fig. 1 is present invention process schema;
Fig. 2 is the process flow sheet of embodiment one;
Fig. 3 is the process flow sheet of embodiment two.
Embodiment
Below in conjunction with embodiment, the present invention is described in further details:
Embodiment one:
The power plant effluent of the present embodiment process, main containing following composition: suspended substance, sodium-chlor, calcium chloride, magnesium chloride, calcium sulfate, magnesium sulfate, sulphite, nitrate, nitrite, heavy metal ion, fluorochemical etc., the power plant effluent Zero-discharge treating process of the present embodiment, specifically comprises the steps:
A, pre-treatment
The waste discharge of recirculated water electric power plant circulating water system produced sends into coagulation basin, coagulating agent and coagulant aids is added in waste water, coagulating agent selective polymerization iron, be specially bodied ferric sulfate, the input amount of flocculation agent is 10mg/L, lime selected by coagulant aids, the input amount of coagulant aids is 1mg/L, be 6 by adding lime by the pH regulator of waste water, flocculation basin is sent into again after coagulating treatment terminates, flocculation agent is added in flocculation basin, flocculation agent optimization polypropylene acid amides, waste water is through coagulation-precipitation, filter, after the process of flocculation-filtration step, by the suspended substance in waste water, part calcium ion and part magnesium ion, partial organic substances, COD, the pollution factors such as BOD enter step b after disposing,
B, RO reverse osmosis
Pretreated waste water enters reverse osmosis unit, through RO reverse-osmosis treated, pretreated waste water is divided into fresh water and haline water, and fresh water is delivered to Boiler water Feeding System workshop and is supplemented to steam-water circulation system, and haline water enters step c;
C, enter desulphurization system
The haline water produced in step b is delivered to desulphurization system Water Sproading utilization as a supplement, desulphurization system produces desulfurization wastewater, and desulfurization wastewater enters steps d;
D, interpolation crude salt
Desulfurization wastewater is imported in sea-water reverse osmose treatment unit and carry out sea-water reverse osmose process, fresh water through seawater reverse osmosis membrane is recycled, concentrated desulfurization wastewater not through seawater reverse osmosis membrane enters reaction tank, in reaction tank, add crude salt, crude salt is crude macrogranule salt, and main component is sodium-chlor, obtain saturated brine, main containing iron, copper, manganese, nickel, cadmium, mercury, chromium, lead, cobalt heavy metal ion in saturated brine, calcium, magnesium ion, nitrate radical, sulfate radical and fluorochemical;
Desulfurization wastewater increased by a step sea-water reverse osmose process and the concentration of the sodium-chlor of high-purity salt solution is promoted further before interpolation crude salt, reduced follow-up interpolation crude salt amount, saved the use of crude salt;
E, chemical refining
Add white lime in saturated brine in reaction tank, sodium hydroxide, sodium carbonate, organosulfur, iron(ic) chloride, polyacrylamide, hydrochloric acid, easy excellent ion isolation water purification agent carry out chemical refining process, the foreign ion such as calcium, magnesium, heavy metal, silicon, sulfate radical removing the overwhelming majority obtains pure salt solution, main containing some suspended substances and a small amount of calcium ion and magnesium ion and hypochlorite ion in pure salt solution;
F, salt refining
Pure salt solution falls the suspended substance in pure salt solution through metre filter, and filter cloth type filter selected by strainer, simple to operate, low price, and filter effect is more excellent; Use hydrochloric acid to regulate pH value to be 6, with resin absorption calcium ion and magnesium ion, finally obtain high-purity salt solution;
G, electrolysis
Saturated sodium chloride solution is delivered to ion-exchange membrane electrolyzer and carries out electrolysis, electrolysis voltage is 2.19V, and electrolytic current density is 1.0kA/ square metre.Electrolysis obtains hydrogen, chlorine and sodium hydroxide solution and recycles.Removal, the part of a part of calcium ions and magnesium ions be used in power plant effluent pre-treatment of sodium hydroxide carry out concentrated rear sale; The hydrogen that electrolysis generates, a part be used for power plant with hydrogen, redundance removal of impurities is outer after purifying sells; The chlorine that electrolysis generates, a part adds to circulating water system, and for suppressing growing of microorganism in circulating water system, redundance removal of impurities is outer after purifying sells, as shown in Figure 2.
Embodiment two:
The power plant effluent of the present embodiment process, main containing following composition: suspended substance, vitriol, sulphite, sodium-chlor, nitrate, nitrite, COD, BOD, NH
3-N etc., the power plant effluent Zero-discharge treating process of the present embodiment, specifically comprises the steps:
A, pre-treatment
The waste discharge of recirculated water electric power plant circulating water system produced sends into coagulation basin, coagulating agent and coagulant aids is added in waste water, coagulating agent preferred polymeric iron, be specially bodied ferric sulfate, input amount is 9mg/L, coagulant aids selects then lime, the input amount of coagulant aids is 3mg/L, be 9 by adding lime by the pH regulator of waste water, flocculation basin is sent into again after coagulation terminates, flocculation agent is added in flocculation basin, flocculation agent optimization polypropylene acid amides, waste water is through coagulation-precipitation, filter, after the process of flocculation-filtration step, by the suspended substance in waste water, COD, calcium ions and magnesium ions etc. enter step b after disposing,
B, RO reverse osmosis
Pretreated waste water enters reverse osmosis unit, through RO reverse-osmosis treated, pretreated waste water is divided into fresh water and haline water, and fresh water is delivered to Boiler water Feeding System workshop and is supplemented to steam-water circulation system, and haline water enters step c;
C, as a supplement water enter desulphurization system
The haline water produced in step b is delivered to desulphurization system Water Sproading utilization as a supplement, desulphurization system produces desulfurization wastewater, and desulfurization wastewater enters steps d;
D, interpolation crude salt
Desulfurization wastewater is imported in sea-water reverse osmose treatment unit and carry out sea-water reverse osmose process, fresh water through seawater reverse osmosis membrane is recycled, concentrated desulfurization wastewater not through seawater reverse osmosis membrane enters reaction tank, in reaction tank, add crude salt, crude salt is crude macrogranule salt, and main component is sodium-chlor, obtain saturated brine, main containing heavy metal ion such as iron, copper, manganese, nickel, cadmium, mercury, chromium, lead, cobalts in saturated brine, calcium, magnesium ion, nitrate radical, sulfate radical and fluorochemical;
Desulfurization wastewater increased by a step sea-water reverse osmose process and the concentration of the sodium-chlor of high-purity salt solution is promoted further before interpolation crude salt, reduced follow-up interpolation crude salt amount, saved the use of crude salt;
E, chemical refining
Add white lime in saturated brine in reaction tank, sodium hydroxide, sodium carbonate, organosulfur, iron(ic) chloride, polyacrylamide, hydrochloric acid, easy excellent ion isolation water purification agent carry out chemical refining process, the foreign ion such as calcium, magnesium, heavy metal, silicon, sulfate radical removing the overwhelming majority obtains pure salt solution, main containing some suspended substances and a small amount of calcium ion and magnesium ion and hypochlorite ion in pure salt solution;
F, salt refining
Pure salt solution falls the suspended substance in pure salt solution through metre filter, and what type filter common selected by strainer, simple to operate; Use hydrochloric acid to regulate pH value to be 9, with resin absorption calcium ion and magnesium ion, finally obtain high-purity salt solution;
E, electrolysis
Saturated sodium chloride solution is delivered to ion-exchange membrane electrolyzer and carries out electrolysis, electrolysis voltage is 4.19V, and electrolytic current density is 5.0kA/ square metre.Electrolysis obtains hydrogen, chlorine and sodium hydroxide solution and recycles.Removal, the part of a part of calcium ions and magnesium ions be used in power plant effluent pre-treatment of sodium hydroxide carry out concentrated rear sale; The hydrogen that electrolysis generates and chlorine, part hydrogen is used for the use hydrogen of power plant, part chlorine addition is to circulating water system, for suppressing growing of microorganism in circulating water system, remaining hydrogen and chlorine synthesize in synthetic furnace, the hydrogenchloride produced, can as the water treatment agent in factory, redundance is sold outward, and therefore being turned waste into wealth by waste water is fully used, as shown in Figure 3.
Claims (9)
1. a power plant effluent Zero-discharge treating process, it is characterized in that: the waste discharge of recirculated water electric power plant circulating water system produced carries out pre-treatment, pretreated waste water is divided into fresh water and haline water through RO reverse-osmosis treated, haline water as a supplement water delivers to recycling in desulphurization system, crude salt is added in the desulfurization wastewater that desulphurization system produces, obtain saturated brine and chemical refining is carried out to saturated brine, remove impurity and obtain saturated pure salt solution, pure salt solution is through salt refining, obtain saturated high-purity salt solution, electrolysis is carried out to high-purity salt solution and obtains hydrogen, chlorine and sodium hydroxide solution.
2. a kind of power plant effluent Zero-discharge treating process according to claim 1, is characterized in that: concrete steps are,
A, pre-treatment
The waste discharge of recirculated water electric power plant circulating water system produced sends into coagulation basin, coagulating agent is added and coagulant aids carries out coagulating treatment in coagulation basin, flocculation basin is sent into again after the waste water filtering of coagulating treatment, in flocculation basin, add flocculation agent carry out flocculation treatment, after the waste water filtering after flocculation treatment, enter step b;
B, RO reverse osmosis
Pretreated waste water enters reverse osmosis unit, and the waste water through RO reverse-osmosis treated is divided into fresh water and haline water, and haline water enters step c;
C, enter desulphurization system
The haline water produced in step b is delivered to desulphurization system Water Sproading utilization as a supplement, the desulfurization wastewater that desulphurization system produces enters steps d;
D, interpolation crude salt
The desulfurization wastewater produced in step c enters reaction tank and add crude salt in reaction tank, obtains saturated brine;
E, chemical refining
In saturated brine, add chemical agent carry out chemical refining process, remove calcium, magnesium, silicon, heavy metal, the sulfate radical in saturated brine, obtain saturated pure salt solution;
F, salt refining
Pure salt solution in step e is filtered, regulates the pH value of pure salt solution, add resin absorption calcium ion and magnesium ion, obtain saturated high-purity salt solution;
G, electrolysis
High-purity salt solution in step f is carried out electrolysis, obtains hydrogen, chlorine and sodium hydroxide solution.
3. a kind of power plant effluent Zero-discharge treating process according to claim 2, is characterized in that: the coagulating agent in described step a is the wherein one of polymeric iron, polymeric aluminum, and described coagulant aids is lime, and described flocculation agent is polyacrylamide.
4. a kind of power plant effluent Zero-discharge treating process according to claim 2, is characterized in that: the fresh water in described step b is delivered to Boiler water Feeding System workshop and is supplemented to steam-water circulation system.
5. a kind of power plant effluent Zero-discharge treating process according to claim 2, it is characterized in that: in described steps d, desulfurization wastewater increased sea-water reverse osmose treatment step before entering reaction tank, obtain fresh water and concentrated desulfurization wastewater, concentrated desulfurization wastewater enters reaction tank, the crude salt added in described steps d is crude macrogranule salt, and main component is sodium-chlor.
6. a kind of power plant effluent Zero-discharge treating process according to claim 2, is characterized in that: in described step e chemical agent be white lime, sodium hydroxide, sodium carbonate, organosulfur, iron(ic) chloride, polyacrylamide, hydrochloric acid, ion isolation water purification agent one or more.
7. a kind of power plant effluent Zero-discharge treating process according to claim 2, it is characterized in that: in described step f, the pH value of pure salt solution is 6 ~ 9, resin model is D403.
8. a kind of power plant effluent Zero-discharge treating process according to claim 2, it is characterized in that: the electrolyzer in described step g is ion-exchange membrane electrolyzer, electrolysis voltage is 2.19 ~ 4.19V, and electrolytic current density is 1.0 ~ 5.0kA/m.
9. a kind of power plant effluent Zero-discharge treating process according to any one of claim 1 or 2, it is characterized in that: described sodium hydroxide solution obtains sodium hydroxide crystal through evaporative crystallization, sodium hydroxide reaches the quality standard of technical grade sodium hydroxide after washing and drying, described hydrogen, chlorine purification processes reach the quality standard of commercial-grade hydrogen and chlorine, hydrogen and chlorine are passed in synthetic furnace carry out synthesis obtain hydrogenchloride recycle.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430780A (en) * | 2016-11-02 | 2017-02-22 | 华润电力（菏泽）有限公司 | Heat-engine plant wastewater treatment method and system |
| CN106517605A (en) * | 2016-11-25 | 2017-03-22 | 武汉尚源新能环境有限公司 | Zero-discharge process and equipment for desulfurization wastewater |
| CN106966537A (en) * | 2017-03-29 | 2017-07-21 | 扬州祥发资源综合利用有限公司 | A kind of zero emission treatment of desulfured waste water and system |
| CN111392923A (en) * | 2020-03-04 | 2020-07-10 | 首钢京唐钢铁联合有限责任公司 | Acid-containing wastewater treatment method, treatment system and application |
| CN114645287A (en) * | 2022-03-18 | 2022-06-21 | 西安吉利电子新材料股份有限公司 | Method for preparing electronic-grade sodium hydroxide, hydrochloric acid, hydrogen and chlorine by electrolyzing sodium chloride by one-step method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430780A (en) * | 2016-11-02 | 2017-02-22 | 华润电力（菏泽）有限公司 | Heat-engine plant wastewater treatment method and system |
| CN106517605A (en) * | 2016-11-25 | 2017-03-22 | 武汉尚源新能环境有限公司 | Zero-discharge process and equipment for desulfurization wastewater |
| CN106966537A (en) * | 2017-03-29 | 2017-07-21 | 扬州祥发资源综合利用有限公司 | A kind of zero emission treatment of desulfured waste water and system |
| CN111392923A (en) * | 2020-03-04 | 2020-07-10 | 首钢京唐钢铁联合有限责任公司 | Acid-containing wastewater treatment method, treatment system and application |
| CN114645287A (en) * | 2022-03-18 | 2022-06-21 | 西安吉利电子新材料股份有限公司 | Method for preparing electronic-grade sodium hydroxide, hydrochloric acid, hydrogen and chlorine by electrolyzing sodium chloride by one-step method |
| CN114645287B (en) * | 2022-03-18 | 2024-02-06 | 西安吉利电子新材料股份有限公司 | Method for preparing electronic grade sodium hydroxide, hydrochloric acid, hydrogen and chlorine by one-step electrolysis of sodium chloride |
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Address after: 050031 Changan District, Hebei, China, North Street, building No. 6, No. Applicant after: China Electric Power Construction Group Hebei electric survey and Design Research Institute Co., Ltd. Address before: 050031 Changan District, Hebei, China, North Street, building No. 6, No. Applicant before: Hebei Province Power Surveying Design & Research Institute |
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Application publication date: 20160504 |