CN107364994A - A kind of method for treating desulfurized wastewater and system - Google Patents
A kind of method for treating desulfurized wastewater and system Download PDFInfo
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- CN107364994A CN107364994A CN201710730814.4A CN201710730814A CN107364994A CN 107364994 A CN107364994 A CN 107364994A CN 201710730814 A CN201710730814 A CN 201710730814A CN 107364994 A CN107364994 A CN 107364994A
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- water
- desulfurization wastewater
- wastewater
- regulating reservoir
- reverse osmosis
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- 239000002351 wastewater Substances 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 96
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 59
- 230000023556 desulfurization Effects 0.000 claims abstract description 59
- 238000011282 treatment Methods 0.000 claims abstract description 21
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000460 chlorine Substances 0.000 claims abstract description 19
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 19
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000003899 bactericide agent Substances 0.000 claims abstract description 12
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 11
- 238000005516 engineering process Methods 0.000 claims abstract description 10
- 239000000725 suspension Substances 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 50
- 238000005189 flocculation Methods 0.000 claims description 30
- 230000016615 flocculation Effects 0.000 claims description 30
- 239000010802 sludge Substances 0.000 claims description 30
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 238000001223 reverse osmosis Methods 0.000 claims description 22
- 238000004062 sedimentation Methods 0.000 claims description 22
- 239000003814 drug Substances 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 13
- 238000000151 deposition Methods 0.000 claims description 11
- 239000012670 alkaline solution Substances 0.000 claims description 9
- 238000001764 infiltration Methods 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 239000007800 oxidant agent Substances 0.000 claims description 8
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 7
- 238000005352 clarification Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- 241000370738 Chlorion Species 0.000 claims description 5
- 241000628997 Flos Species 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- 239000002585 base Substances 0.000 claims description 3
- 229940079593 drug Drugs 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 238000006479 redox reaction Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 abstract description 12
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000001954 sterilising effect Effects 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 239000010865 sewage Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- KQPBSBAEBKRAAU-UHFFFAOYSA-N hypochlorous acid;sodium Chemical compound [Na].ClO KQPBSBAEBKRAAU-UHFFFAOYSA-N 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- C02F1/4602—Treatment of water, waste water, or sewage by electrochemical methods for prevention or elimination of deposits
-
- 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
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
- C02F1/465—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
-
- 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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
-
- 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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
-
- 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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a kind of method for treating desulfurized wastewater and system, method includes using electrochemical treatments mode first, remove suspension, heavy metal and the COD in desulfurization wastewater, secondly desulfurization wastewater is concentrated by ro treatment technology, produce water and enter power plant's production technology section progress reuse, the chloride ion content in water is greatly lowered by preparing chlorine by electrolysis system for concentrated water after concentration, is finally hypochlorite by the villaumite conversion in concentrated water.The hypochlorite that inventive desulfurization method of wastewater treatment obtains has very strong sterilizing function, power plant cycle water process, film processing system bactericide can be used as to use, improve the recycling rate of power plant's water system, reduce water intake of power plant cost and production cost.
Description
Technical field
The present invention relates to the process field of heat-engine plant desulfurized waste water, specifically a kind of method for treating desulfurized wastewater and system.
Background technology
Prior art mainly has two schemes：
The desulfurization wastewater of scheme one uses flocculation sediment+softening+concentration+evaporation+crystallization
The problem of existing:
1st, occupation area of equipment is big, and construction investment is very high, and ton water invests 3,500,000-400 ten thousand yuan/ton of water；
2nd, medicament and high energy consumption, cause O＆M costly, about 300 yuan/ton of water of operation and maintenance expenses；
3rd, the disposal costs of evaporative crystallization product mixed salt are high；
3rd, divide sodium chloride, the sodium sulphate market value of salt output low, it is difficult to cost recovery.
4th, thermal power plant need to consider outer committee's disposal or as solidification disposal of waste without industrial salt manufacturing licensing；
The desulfurization wastewater of scheme two passes through flocculation sediment+flue evaporation technology
The problem of existing：
1st, in the case of design improperly, flue fouling is serious；Flue flow field is complicated, and if design is improper, flying dust can produce viscous
On the wall, chlorion can be to causing heavy corrosion exposed to outer steel member for attached effect adhesion；
2nd, the design of atomizer and the arrangement of shower nozzle influence big, the size of desulfurization wastewater concentration and atomized drop on evaporation effect
Directly affect evaporation effect；
3rd, the burden of deduster is added, while reduces fired coal combustion efficiency；Desulfurization wastewater pretreatment is had higher requirements, water
Middle SS quantity influences very big on flue evaporation rotational flow atomizer；
4th, treating capacity is small, about 2,600,000 yuan of ton water investment cost, about 130 yuan/ton of water of operation and maintenance expenses；Such as increase treating capacity, need to be to being
System is redesigned；
5th, the evaporation of desulfurization wastewater reduces cigarette temperature, reduces the efficiency of combustion of boiler, adds coal-fired consumption；
6th, desulfurization wastewater is not handled, can not reuse, do not meet the national policy of energy-saving and water-saving.
The content of the invention
For above-mentioned technical problem, the present invention proposes a kind of method for treating desulfurized wastewater, using electrochemical treatments mode, gone
Except the suspension in desulfurization wastewater, heavy metal and COD, desulfurization wastewater is concentrated by ro treatment technology, production water enters
Enter power plant's production technology section and carry out reuse, the chlorion that the concentrated water after concentration is greatly lowered by preparing chlorine by electrolysis system in water contains
Amount, is hypochlorite by the villaumite conversion in concentrated water, hypochlorite has very strong sterilizing function, can be used as power plant cycle
Water process, film processing system bactericide use, and improve the recycling rate of power plant's water system, reduce water intake of power plant cost and
Production cost.
In order to realize above-mentioned technical purpose, the present invention adopts the following technical scheme that：
A kind of method for treating desulfurized wastewater, is divided into following steps：
Step S1, desulfurization wastewater stands clarification and produces supernatant；
Step S2, first time pH value regulation is carried out to the desulfurization wastewater after step S1 processing, specifically through step S1 processing
Alkaline solution is added in desulfurization wastewater afterwards and well mixed so that waste water solution is in alkalescence after mixing；
Step S3, electric flocculation sofening treatment is carried out to the desulfurization wastewater after step S2 processing, occurred by additional strong oxidizer
Electro-Fenton reaction removes COD, the suspension, again gone by electric flocculation device itself flocculation, air supporting, redox reaction in removing water
Metal；
Step S4, second of pH value regulation is carried out to the desulfurization wastewater after step S3 processing, specifically through step S3 processing
The alkaline solution that acid medicine is added in waste water afterwards to be added in neutralization procedure S2；
Step S5, reverse osmosis concentration is carried out to the desulfurization wastewater after second of pH value regulation of step S4 processing；
Step S6, the reverse osmosis concentrated water after the processing of step S5 reverse osmosis concentrations is inputted into preparing chlorine by electrolysis device, in the work of electric current
Under, following reaction occurs for reverse osmosis concentrated water：NaCl+H2O-----NaClO+H2, liquor natrii hypochloritis enter as bactericide
Condenser processing system or chemical water treatment system play bactericidal action, and the addition of bactericide can be greatly reduced, final real
Existing power plant desulfurization wastewater zero-emission.
The first time pH value adjusts waste water pH value between 5 ~ 6.5.
Second of pH value adjusts waste water pH value between 6.8 ~ 7.2.
The alkaline solution is sodium hydroxide solution.
The acid medicine is hydrochloric acid.
The present invention further also discloses a kind of desulfurization wastewater treatment system based on the method for treating desulfurized wastewater, wraps
Include the desulfurization wastewater softening plant being sequentially connected by pipeline, demineralizer and preparing chlorine by electrolysis system；
The desulfurization wastewater softening plant include preliminary sedimentation tank, the first regulating reservoir, electric flocculation device, depositing reservoir, the second regulating reservoir with
And sludge treatment device, wherein：
The bottom of preliminary sedimentation tank is provided with connection inlet channel, sets delivery port in preliminary sedimentation tank pool wall side, delivery port goes out by first
Waterpipe is connected with the first regulating reservoir, and preliminary sedimentation tank sets liquid level gauge；
First regulating reservoir peripheral hardware highly basic medicine system, after chemical feeding points are arranged on waste water delivery pump, strong base solution is placed on outdoor
In lye tank, alkali lye is added in pipe-line mixer by drug feeding pipeline by dosing pump, and desulfurization wastewater mixes with medicament in pipeline
Premix, and be added in the first regulating reservoir in clutch, mixer is set in the first regulating reservoir, passes through the second water outlet on the first regulating reservoir
Pipeline is connected with electric flocculation device, and flowmeter and regulating valve are set on second outlet conduit；
Battery lead plate, strong oxidizer adding set and PH meters are set in electric flocculation device, electric flocculation bottom of device sets sludge to arrange
Mouth is put, sludge caused by reaction connects sludge pipe by floss hole and enters sludge treatment device, and reacted water outlet passes through first
The flow export of isopipe root enters depositing reservoir, and inclined tube clarifier is set in depositing reservoir, and current enter inclined tube clarifier, gone forward side by side
Row natural sedimentation, the water outlet after clarification overflow to the second overflow launder by overflow manner, and the second isopipe root sets flow export,
The water of outflow enters more medium filter, and the water after more medium filter filters is flowed into the second regulating reservoir.
HCL chemical feeding points and agitating device are set in the second regulating reservoir, and PH tables, transmissometer, electrical conductivity table are set, simultaneously
Sample tap is set in the second regulating reservoir, the parameters of water outlet detected, by water delivery after the second regulating reservoir water outlet is qualified
Pump flows to demineralizer.
The demineralizer includes counter-infiltration raw water box and reverse osmosis unit；By water delivery after second regulating reservoir water outlet is qualified
Pump flows to that counter-infiltration raw water box is standby, and the water outlet of counter-infiltration raw water box enters reverse osmosis unit, is gone by reverse osmosis unit in water removal
Salinity, production water enters power plant production technology section and carries out reuse, and concentrated water enters preparing chlorine by electrolysis system.
The preparing chlorine by electrolysis system includes preparing chlorine by electrolysis system and sodium hypochlorite storage box, wherein, preparing chlorine by electrolysis system will
Chlorion generation sodium hypochlorite in concentrated water after reverse osmosis unit is handled, is stored in sodium hypochlorite storage box, hypochlorous acid
Sodium solution enters condenser processing system or chemical water treatment system uses as bactericide, finally realizes power plant desulfurization wastewater zero
Discharge.
The beneficial effects of the invention are as follows：
The present invention uses electrochemical treatments mode, suspension, heavy metal and COD in desulfurization wastewater is removed, at counter-infiltration
Science and engineering skill concentrates to desulfurization wastewater, and production water enters power plant's production technology section and carries out reuse, and the concentrated water after concentration passes through electrolysis
The chloride ion content in water is greatly lowered in chlorine system processed, is hypochlorite by the villaumite conversion in concentrated water, hypochlorite
There is very strong sterilizing function, power plant cycle water process, film processing system bactericide can be used as to use, improve power plant's water system
Recycling rate, reduce water intake of power plant cost and production cost.
Compared to other two kinds of desulfurization wastewater technique of zero discharge, inventive desulfurization method of wastewater treatment has the following advantages that：
Firstth, equipment modularization assembling, is not limited treating capacity using sled blockization design；
Secondth, cost of investment is low；
3rd, operation expense is low, and the inventive method equipment is low-pressure system, and O＆M cost is low, is transported equivalent to other techniques
Cost 8% is tieed up, standby redundancy is easy to get and cheap；
4th, equipment is arranged on outside power plants generating electricity system, can independent operating, to power plant production do not impact；
5th, technique is simple, and system is easy to connect, is not required to add medicament in production, will not pollute；
6th, end productses are the necessary medicaments of power plant's conventional treatment, and usable value is high.
Brief description of the drawings
Fig. 1 is the structural representation of the heat-engine plant desulfurized Waste Water Treatment of the present invention；
Fig. 2 is the structural representation of electric flocculation device.
Embodiment
With reference to Figure of description and specific embodiment to a kind of method for treating desulfurized wastewater of the present invention and system
Technical scheme elaborates.
A kind of method for treating desulfurized wastewater, is divided into following steps：
Step S1, desulfurization wastewater stands clarification and produces supernatant；
Step S2, first time pH value regulation is carried out to the desulfurization wastewater after step S1 processing, specifically through step S1 processing
Alkaline solution is added in desulfurization wastewater afterwards and well mixed so that waste water solution is in alkalescence after mixing；
Step S3, electric flocculation sofening treatment is carried out to the desulfurization wastewater after step S2 processing, occurred by additional strong oxidizer
Electro-Fenton reaction removes COD, the suspension, again gone by electric flocculation device itself flocculation, air supporting, redox reaction in removing water
Metal；
Step S4, second of pH value regulation is carried out to the desulfurization wastewater after step S3 processing, specifically through step S3 processing
The alkaline solution that acid medicine is added in waste water afterwards to be added in neutralization procedure S2；
Step S5, reverse osmosis concentration is carried out to the desulfurization wastewater after second of pH value regulation of step S4 processing；
Step S6, the reverse osmosis concentrated water after the processing of step S5 reverse osmosis concentrations is inputted into preparing chlorine by electrolysis device, in the work of electric current
Under, following reaction occurs for reverse osmosis concentrated water：NaCl+H2O-----NaClO+H2, liquor natrii hypochloritis enter as bactericide
Condenser processing system or chemical water treatment system play bactericidal action, and the addition of bactericide can be greatly reduced, final real
Existing power plant desulfurization wastewater zero-emission.
As the further preferred scheme of inventive desulfurization method of wastewater treatment, the first time pH value adjusts waste water pH value
To between 5 ~ 6.5.
As the further preferred scheme of inventive desulfurization method of wastewater treatment, second of pH value adjusts waste water pH value
To between 6.8 ~ 7.2.
As the further preferred scheme of inventive desulfurization method of wastewater treatment, the alkaline solution is that sodium hydroxide is molten
Liquid.
As the further preferred scheme of inventive desulfurization method of wastewater treatment, the acid medicine is hydrochloric acid.
As shown in figure 1, the present invention further also discloses a kind of desulfurization wastewater based on the method for treating desulfurized wastewater
Processing system, including desulfurization wastewater softening plant, demineralizer and the preparing chlorine by electrolysis system being sequentially connected by pipeline；
The desulfurization wastewater softening plant include preliminary sedimentation tank, the first regulating reservoir, electric flocculation device, depositing reservoir, the second regulating reservoir with
And sludge treatment device, wherein：
The bottom of preliminary sedimentation tank is provided with connection inlet channel, sets delivery port in preliminary sedimentation tank pool wall side, delivery port goes out by first
Waterpipe is connected with the first regulating reservoir, and preliminary sedimentation tank sets liquid level gauge；
First regulating reservoir peripheral hardware highly basic medicine system, after chemical feeding points are arranged on waste water delivery pump, strong base solution is placed on outdoor
In lye tank, alkali lye is added in pipe-line mixer by drug feeding pipeline by dosing pump, and desulfurization wastewater mixes with medicament in pipeline
Premix, and be added in the first regulating reservoir in clutch, mixer is set in the first regulating reservoir, passes through the second water outlet on the first regulating reservoir
Pipeline is connected with electric flocculation device, and flowmeter and regulating valve are set on second outlet conduit；
Battery lead plate, strong oxidizer adding set and PH meters are set in electric flocculation device, electric flocculation bottom of device sets sludge to arrange
Mouth is put, sludge caused by reaction connects sludge pipe by floss hole and enters sludge treatment device, and reacted water outlet passes through first
The flow export of isopipe root enters depositing reservoir, and inclined tube clarifier is set in depositing reservoir, and current enter inclined tube clarifier, gone forward side by side
Row natural sedimentation, the water outlet after clarification overflow to the second overflow launder by overflow manner, and the second isopipe root sets flow export,
The water of outflow enters more medium filter, and the water after more medium filter filters is flowed into the second regulating reservoir.
Desulfurization wastewater enters preliminary sedimentation tank by sewage pump, and is premixed by pipe-line mixer, and desulfurization wastewater exists
Preliminary sedimentation tank bottom enters in pond, while sets sludge blowdown apparatus in preliminary sedimentation tank bottom, check valve is set on blow-off pipe, and lead to
Cross sludge pump and enter the first sludge compressor.
Mud discharging is entered the first sludge compressor by sludge drainage system by sludge pump, and the water after sludge compression is back to just
In heavy pond, outward transport processing after sludge compression.
First outlet conduit is set inside preliminary sedimentation tank, and supernatant of the sewage after precipitation is by waste water delivery pump to the
In one regulating reservoir, preliminary sedimentation tank sets liquid level gauge.
First regulating reservoir peripheral hardware highly basic medicine system, alkali lye are added in pipe-line mixer by medicine system, waste water with
Alkali lye premixes in pipe-line mixer, and is added in the first regulating reservoir.The pH value that highly basic is used to adjust waste water is added, while can be sunk
Shallow lake part calcium ions and magnesium ions；Waste water enters in preliminary sedimentation tank, and mixer is set in pond, and mixer rotates stirring and alkali lye is filled with waste water
Divide mixing, PH tables are set in the first regulating reservoir, mixer is linked with waste water delivery pump, and mixer is opened when waste water delivery pump is opened
Open the first regulating reservoir and magnetic double level gauge is set, setting high-low-position is spacing, the sewage transport when liquid level reaches top set location
Pump is out of service, and when sewage is to delivery port neighbouring position, pump is out of service, and chemical feeding quantity is adjusted according to the PH tables of setting；Mix
Waste water flowed out by delivery port, the first regulating reservoir bottom set sewage draining exit discharge sludge.Blow-off line and the first regulating reservoir are dirty
Mud discharge tube connects, and is handled by the first sludge compressor compresses.
Heretofore described electric flocculation apparatus structure on flow ipe as shown in Fig. 2 set flowmeter and regulating valve.
Waste water passes through waste water pump and regulating valve to electric flocculation device from the first regulating reservoir.
Battery lead plate is set in electric flocculation device, electric flocculation bottom of device sets mud discharging mouth, and sludge caused by reaction passes through
Floss hole connects sludge pipe and enters the second sludge compressor, the outward transport disposal of compressed sludge, and the water outlet of sludge compressibility enters
Second regulating reservoir.
Battery lead plate neck is set in electric flocculation device, battery lead plate is placed in battery lead plate neck, setting strong oxidizer in device adds
Feeder apparatus, strong oxidizer can be added electro-Fenton reaction occurs under the function of current, PH meters are set in electric flocculation device, after reaction
Flow export of the water outlet Jing Guo the first isopipe root enter depositing reservoir, inclined tube clarifier is set in depositing reservoir, current enter oblique
Pipe clarifier, and natural sedimentation is carried out, the water outlet after clarification overflows to the second overflow launder, the second overflow launder by overflow manner
Bottom sets flow export, and the water of outflow enters more medium filter；Water after more medium filter filters is flowed into second
Regulating reservoir.
Further, HCL chemical feeding points and agitating device are set in the second regulating reservoir, and PH tables, transmissometer, conductance are set
Rate table, while sample tap is set in the second regulating reservoir, the parameters of water outlet are detected, after the second regulating reservoir water outlet is qualified
It is standby that counter-infiltration raw water box is flowed to by water-delivery pump；The water outlet of counter-infiltration raw water box enters reverse osmosis unit.
The salinity gone by reverse osmosis unit in water removal, production water enter power plant's production technology section and carry out reuse, and concentrated water enters
Chlorion in water is generated sodium hypochlorite by preparing chlorine by electrolysis system, preparing chlorine by electrolysis system, and liquor natrii hypochloritis enters at condenser
Reason system or chemical water treatment system use as bactericide, finally realize power plant desulfurization wastewater zero-emission.
Claims (8)
1. a kind of method for treating desulfurized wastewater, it is characterised in that be divided into following steps：
Step S1, desulfurization wastewater stands clarification and produces supernatant；
Step S2, first time pH value regulation is carried out to the desulfurization wastewater after step S1 processing, specifically through step S1 processing
Alkaline solution is added in desulfurization wastewater afterwards and well mixed so that waste water solution is in alkalescence after mixing；
Step S3, electric flocculation sofening treatment is carried out to the desulfurization wastewater after step S2 processing, occurred by additional strong oxidizer
Electro-Fenton reaction removes COD, the suspension, again gone by electric flocculation device itself flocculation, air supporting, redox reaction in removing water
Metal；
Step S4, second of pH value regulation is carried out to the desulfurization wastewater after step S3 processing, specifically through step S3 processing
The alkaline solution that acid medicine is added in waste water afterwards to be added in neutralization procedure S2；
Step S5, reverse osmosis concentration is carried out to the desulfurization wastewater after second of pH value regulation of step S4 processing；
Step S6, the reverse osmosis concentrated water after the processing of step S5 reverse osmosis concentrations is inputted into preparing chlorine by electrolysis device, in the work of electric current
Under, following reaction occurs for reverse osmosis concentrated water：NaCl+H2O-----NaClO+H2, liquor natrii hypochloritis enter as bactericide
Condenser processing system or chemical water treatment system play bactericidal action, and the addition of bactericide can be greatly reduced, final real
Existing power plant desulfurization wastewater zero-emission.
2. method for treating desulfurized wastewater according to claim 1, it is characterised in that the first time pH value regulation waste water PH
It is worth between 5 ~ 6.5.
3. method for treating desulfurized wastewater according to claim 1, it is characterised in that second of pH value regulation waste water PH
It is worth between 6.8 ~ 7.2.
4. method for treating desulfurized wastewater according to claim 1, it is characterised in that the alkaline solution is that sodium hydroxide is molten
Liquid.
5. method for treating desulfurized wastewater according to claim 1, it is characterised in that the acid medicine is hydrochloric acid.
A kind of 6. desulfurization wastewater treatment system based on method for treating desulfurized wastewater described in claim 1, it is characterised in that including
Desulfurization wastewater softening plant, demineralizer and the preparing chlorine by electrolysis system being sequentially connected by pipeline；
The desulfurization wastewater softening plant include preliminary sedimentation tank, the first regulating reservoir, electric flocculation device, depositing reservoir, the second regulating reservoir with
And sludge treatment device, wherein：
The bottom of preliminary sedimentation tank is provided with connection inlet channel, sets delivery port in preliminary sedimentation tank pool wall side, delivery port goes out by first
Waterpipe is connected with the first regulating reservoir, and preliminary sedimentation tank sets liquid level gauge；
First regulating reservoir peripheral hardware highly basic medicine system, after chemical feeding points are arranged on waste water delivery pump, strong base solution is placed on outdoor
In lye tank, alkali lye is added in pipe-line mixer by drug feeding pipeline by dosing pump, and desulfurization wastewater mixes with medicament in pipeline
Premix, and be added in the first regulating reservoir in clutch, mixer is set in the first regulating reservoir, passes through the second water outlet on the first regulating reservoir
Pipeline is connected with electric flocculation device, and flowmeter and regulating valve are set on second outlet conduit；
Battery lead plate, strong oxidizer adding set and PH meters are set in electric flocculation device, electric flocculation bottom of device sets sludge to arrange
Mouth is put, sludge caused by reaction connects sludge pipe by floss hole and enters sludge treatment device, and reacted water outlet passes through first
The flow export of isopipe root enters depositing reservoir, and inclined tube clarifier is set in depositing reservoir, and current enter inclined tube clarifier, gone forward side by side
Row natural sedimentation, the water outlet after clarification overflow to the second overflow launder by overflow manner, and the second isopipe root sets flow export,
The water of outflow enters more medium filter, and the water after more medium filter filters is flowed into the second regulating reservoir；
HCL chemical feeding points and agitating device are set in the second regulating reservoir, and PH tables, transmissometer, electrical conductivity table are set, while the
Two regulating reservoirs set sample tap, the parameters of water outlet are detected, by water-delivery pump stream after the second regulating reservoir water outlet is qualified
To demineralizer.
7. the desulfurization wastewater treatment system of method for treating desulfurized wastewater according to claim 6, it is characterised in that described to remove
Salt device includes counter-infiltration raw water box and reverse osmosis unit；After second regulating reservoir water outlet is qualified counter-infiltration original is flowed to by water-delivery pump
Water tank is standby, and the water outlet of counter-infiltration raw water box enters reverse osmosis unit, the salinity gone by reverse osmosis unit in water removal, and production water enters
Power plant's production technology section carries out reuse, and concentrated water enters preparing chlorine by electrolysis system.
8. the desulfurization wastewater treatment system of method for treating desulfurized wastewater according to claim 6, it is characterised in that the electricity
Solution chlorine system includes preparing chlorine by electrolysis system and sodium hypochlorite storage box, wherein, preparing chlorine by electrolysis system will be through reverse osmosis unit at
Chlorion generation sodium hypochlorite in concentrated water after reason, is stored in sodium hypochlorite storage box, liquor natrii hypochloritis enters condensing
Device processing system or chemical water treatment system use as bactericide, finally realize power plant desulfurization wastewater zero-emission.
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| CN108046484A (en) * | 2018-01-31 | 2018-05-18 | 大唐环境产业集团股份有限公司 | A kind of device and method using solid phase class Fenton process processing desulfurization wastewater |
| CN108455773A (en) * | 2018-04-11 | 2018-08-28 | 南京友智科技有限公司 | A kind of system and method for the industrially desulfurized waste water of processing |
| CN108529798A (en) * | 2018-05-02 | 2018-09-14 | 山东格润内泽姆环保科技有限公司 | A kind of vibrating membrane adds preparing chlorine by electrolysis combined method desulfurization wastewater advanced treatment system |
| CN109851137A (en) * | 2018-12-26 | 2019-06-07 | 国电新能源技术研究院有限公司 | A kind of desulfurization wastewater treatment system and method |
| CN110526471A (en) * | 2019-09-17 | 2019-12-03 | 西安热工研究院有限公司 | A kind of processing system and method for heat-engine plant desulfurized waste water |
| CN111675354A (en) * | 2020-06-01 | 2020-09-18 | 北京朗新明环保科技有限公司 | Method for treating circulating sewage of power plant by using electrochemical crystallization granulation system |
| CN115583715A (en) * | 2022-12-08 | 2023-01-10 | 浙江浙能技术研究院有限公司 | Heat-engine plant cooling water bactericide adding system and operation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108046484A (en) * | 2018-01-31 | 2018-05-18 | 大唐环境产业集团股份有限公司 | A kind of device and method using solid phase class Fenton process processing desulfurization wastewater |
| CN108455773A (en) * | 2018-04-11 | 2018-08-28 | 南京友智科技有限公司 | A kind of system and method for the industrially desulfurized waste water of processing |
| CN108529798A (en) * | 2018-05-02 | 2018-09-14 | 山东格润内泽姆环保科技有限公司 | A kind of vibrating membrane adds preparing chlorine by electrolysis combined method desulfurization wastewater advanced treatment system |
| CN109851137A (en) * | 2018-12-26 | 2019-06-07 | 国电新能源技术研究院有限公司 | A kind of desulfurization wastewater treatment system and method |
| CN110526471A (en) * | 2019-09-17 | 2019-12-03 | 西安热工研究院有限公司 | A kind of processing system and method for heat-engine plant desulfurized waste water |
| CN111675354A (en) * | 2020-06-01 | 2020-09-18 | 北京朗新明环保科技有限公司 | Method for treating circulating sewage of power plant by using electrochemical crystallization granulation system |
| CN115583715A (en) * | 2022-12-08 | 2023-01-10 | 浙江浙能技术研究院有限公司 | Heat-engine plant cooling water bactericide adding system and operation method |
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