CN107902826A - A kind of power plant desulfurization wastewater zero-discharge treatment system and method - Google Patents

A kind of power plant desulfurization wastewater zero-discharge treatment system and method Download PDF

Info

Publication number
CN107902826A
CN107902826A CN201711078411.2A CN201711078411A CN107902826A CN 107902826 A CN107902826 A CN 107902826A CN 201711078411 A CN201711078411 A CN 201711078411A CN 107902826 A CN107902826 A CN 107902826A
Authority
CN
China
Prior art keywords
desulfurization wastewater
power plant
sludge
discharge treatment
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711078411.2A
Other languages
Chinese (zh)
Inventor
周林超
曾凡付
侯荣
艾山·玉素莆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XINJIANG ENVIRONMENTAL ENGINEERING TECHNOLOGY Co Ltd
Original Assignee
XINJIANG ENVIRONMENTAL ENGINEERING TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by XINJIANG ENVIRONMENTAL ENGINEERING TECHNOLOGY Co Ltd filed Critical XINJIANG ENVIRONMENTAL ENGINEERING TECHNOLOGY Co Ltd
Priority to CN201711078411.2A priority Critical patent/CN107902826A/en
Publication of CN107902826A publication Critical patent/CN107902826A/en
Pending legal-status Critical Current

Links

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
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • 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
    • 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
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048—Purification of waste water by evaporation
    • 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
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
    • C02F1/12—Spray evaporation
    • 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
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • 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
    • C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
    • 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
    • C02F1/52—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
    • 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
    • C02F1/5281—Installations for water purification using chemical agents
    • 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
    • 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
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • 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
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/02—Softening water by precipitation of the hardness
    • C02F5/06—Softening water by precipitation of the hardness using calcium compounds

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a kind of power plant desulfurization wastewater zero-discharge treatment system, including pretreatment unit, softening precipitation unit, advanced treatment unit, evaporative crystallization unit and sludge treating block.Power plant desulfurization wastewater reaches to the requirement recycled after processing, environmental protection, saltcake and crystallization carnallite after evaporative crystallization can be sold, and produce economic benefit, technology application has a extensive future, and social and economic benefit is notable.

Description

A kind of power plant desulfurization wastewater zero-discharge treatment system and method
Technical field
The present invention relates to technical field of sewage, more particularly to a kind of power plant desulfurization wastewater zero-discharge treatment system and side Method.
Background technology
In the power industry in China, coal-burning power plant account for greatly, with the increasingly stringent of environmental protection policy and The continuous promotion and implementation of energy saving policy, the processing and reuse of coal-burning power plant's waste water are increasingly valued by people.Wherein, it is coal-fired The desulfurization wastewater of power plant due to suspension content is high, salt content is high, hardness is high, content of beary metal is high, chlorion and sulfate radical from Sub- content is high, corrosivity is strong and is rich in sulphite, sulfate, fluoride etc., is always the difficult point of Industrial Wastewater Treatment.
At present, domestic Desulphurization for Coal-fired Power Plant waste water is most of mainly by directly being discharged after dosing coagulating sedimentation, still It is very high to discharge dissolving salt content in water, it is direct to discharge the quality that seriously affect receiving water body, it can also cause the salinization of soil in soil The problems such as.
It is that water treatment facilities and equipment operating cost can be with providing during zero-emission to solve the regenerated key of desulfurization wastewater The benefit that source recycling produces matches.Why many enterprises for being currently, there are desulfurization wastewater processing do not accomplish zero-emission, deposit On the one hand it is technical problem in two reasons, is exactly on the other hand the excessive investment operating cost of zero-emission, hinders zero-emission Implementation.Therefore, developing a kind of economical and effective desulfurization wastewater Zero-discharge treating process and technology becomes the weight studied instantly Point.
The content of the invention
The purpose of the invention is to provide a kind of economic, efficient power plant desulfurization wastewater zero discharge treatment integrated approach, Wastewater to reach standard after advanced treating can be back to enterprise's industrial water, crystal salt reaches the standard of Nacl and sub-prime utilizes.
A kind of power plant desulfurization wastewater zero-discharge treatment system, including：
Pretreatment unit：Adjusted and flocculated pretreatment for carrying out pH to desulfurization wastewater；
Soften precipitation unit：For softening to pretreated desulfurization wastewater；
Advanced treatment unit：For being carried out to the desulfurization wastewater after softening at ion exchange, reverse-osmosis treated and electrodialysis Reason, to obtain fresh water and concentrated water；
Evaporative crystallization unit：For concentrated water to be evaporated crystallization, spray drying treatment to obtain carnallite；
Sludge treating block：The sludge that processing system is produced introduces sludge-tank, in the case where adding dehydrating agent through dirt Mud dehydration device is dehydrated, and fuel is recycled as after desiccation.
Preferably, the pretreatment unit includes pH regulating boxs, reaction chamber and flocculation tanks, and the flocculation tanks connect sewage Pond.
Preferably, the softening precipitation unit includes softening sedimentation basin and limestone pulping pond.
Preferably, the advanced treatment unit includes mechanical filter equipment, ion-exchanger, ultrafiltration apparatus, reverse osmosis sets Standby and electrodialysis plant, the reverse osmosis equipment and electrodialysis plant are all connected with production pond.
Preferably, the evaporative crystallization unit includes MVR evaporators, freezing denitrification apparatus and spray-drying installation.
Preferably, the sludge treating block includes sludge-tank and sludge dehydration device.
A kind of power plant desulfurization wastewater Zero discharge treatment method, method and step are as follows：
S1：Power plant desulfurization wastewater is passed through the pretreatment unit, successively by pH regulating boxs, reaction chamber and the flocculation Case, the precipitation that flocculation tanks are obtained are discharged into sludge-tank, are dehydrated through sludge dehydration device, and fuel is recycled as after desiccation；PH is adjusted Case adds antalkali, and reaction chamber adds vulcanizing agent, and flocculation tanks add flocculant, coagulant, the sludge produced in flocculation tanks Sludge-tank is introduced by pipeline, the antalkali includes milk of lime, sodium hydroxide etc.；The vulcanizing agent is organic sulfur TMT-15；The flocculant is commercially available polyaluminium chloride, and flocculation aid is polyacrylamide.
S2：The water outlet that flocculation tanks in S1 obtain is passed through softening sedimentation basin, medicament is added and adjusts the water hardness, softened generation Precipitation be discharged into limestone pulping pond；The medicament is for caustic soda, soda ash etc., the pH to 10.7-10.9 of regulating water quality, with pH value It is optimal for 10.85；
S3：By in S2 soften precipitation unit water outlet be passed through the advanced treatment unit, successively by mechanical filter equipment, Ion-exchanger, ultrafiltration apparatus, reverse osmosis equipment and electrodialysis plant, the fresh water obtained by electrodialysis plant lead to production pond；
S4：The concentrated water that electrodialysis plant in S3 obtains is passed through the evaporative crystallization unit, successively by MVR evaporators and Denitrification apparatus is freezed, saltcake is separated out after chilled processing, the concentrated water for isolating saltcake is passed through spray drying system, it is dry through spraying Crystallization carnallite is obtained after dry processing.
Further, the salt content for the concentrated water that electrodialysis plant obtains is 23-27g/L in the S3.
Further, the salt content of the concentrated water obtained in the S4 through MVR evaporators is 100-120g/L.
Further, the temperature that denitrification apparatus is freezed in the S4 is -10-0 DEG C.
Compared with the prior art, the present invention has the beneficial effect that：
This integrated technology is removed the suspended matter in power plant desulfurization wastewater and beavy metal impurity by pretreatment, softened heavy Shallow lake unit can effectively reduce the hardness of waste water, then waste water is completely separated by advanced treatment unit, isolated fresh water Production system can be back to, concentrated water divides salt treatment through evaporative crystallization, separation to a certain extent is carried out to crystal salt, by above-mentioned It is a series of to handle the technical requirements that can reach wastewater zero discharge.
This integrated technique has reached the requirement of environment protecting and power-saving emission reduction, and power plant desulfurization wastewater has been reached after processing and has been followed The requirement that ring utilizes, environmental protection, saltcake and crystallization carnallite after evaporative crystallization can be sold, and produce economic benefit, skill Art application has a extensive future, and social and economic benefit is notable.
Brief description of the drawings
Fig. 1 is a kind of total Technology Roadmap of power plant desulfurization wastewater treatment zero draining integrated approach；
Fig. 2 is the Technology Roadmap of sludge treating block.
Embodiment
The present invention is made with reference to specific embodiment further to explain.
Embodiment 1
A kind of power plant desulfurization wastewater treatment zero draining integrated approach, including：
Pretreatment unit：Desulfurization wastewater is entered into three headers, pH regulating boxs add antalkali, and reaction chamber adds vulcanization Agent, flocculation tanks add flocculant, coagulant, and the sludge produced in flocculation tanks introduces sludge-tank by pipeline, and antalkali is stone Grey breast；Vulcanizing agent is organic sulfur TMT-15；Flocculant is commercially available polyaluminium chloride, and flocculation aid is polyacrylamide.
Soften precipitation unit：Pretreatment production water is passed through softening sedimentation basin, according to the calcium of pretreatment unit water outlet it is hard and The dosage of total hard regulating agent, and the pH to 10.7 of the solubility product constant regulating water quality according to each material, softened generation For precipitation by pipeline to limestone pulping pond, medicament is caustic soda.
Advanced treatment unit：Soften precipitation unit water outlet by entering ion-exchanger, mechanical mistake after mechanical filter equipment Filter equipment and the backwash water of ion-exchanger are back to regulating box；The production water of ion-exchanger is reverse osmosis through entering after hyperfiltration treatment System, production water need to add fungicide before entering ultrafiltration system, need to add antisludging agent before into counter-infiltration system, ultrafiltration is set Standby and reverse osmosis equipment backwash water is back to regulating box, and reverse osmosis produced water then is led to production pond so as to be back to production system In, reverse osmosis concentrated water further circulates concentration into electrodialysis system, treats that the concentrated water in electrodialysis plant is concentrated into containing for 23g/L Enter evaporative crystallization unit during salt amount, fresh water leads to production pond.
Evaporative crystallization unit：Electrodialysis concentrated water introducing MVR evaporators are evaporated crystallization, it is to be concentrated to after 100g/L, Freezing denitrification apparatus (- 10 DEG C) is entered by crystal separator, saltcake is separated out after chilled processing, the concentrated water for isolating saltcake is led to Enter spray drying system, crystallization carnallite is obtained after spray-dried processing, periodically outward transport.
Sludge treating block：Sludge-tank is introduced to the sludge that flocculation tanks produce, in the case where adding dehydrating agent through sludge Dehydration device is dehydrated, and fuel is recycled as after desiccation；Dehydrating agent is commercially available cationic polyacrylamide.
Embodiment 2
A kind of power plant desulfurization wastewater treatment zero draining integrated approach, including：
Pretreatment unit：Desulfurization wastewater is entered into three headers, pH regulating boxs add antalkali, and reaction chamber adds vulcanization Agent, flocculation tanks add flocculant, coagulant, and the sludge produced in flocculation tanks introduces sludge-tank by pipeline, and antalkali is hydrogen Sodium oxide molybdena；Vulcanizing agent is organic sulfur TMT-15；Flocculant is commercially available polyaluminium chloride, and flocculation aid is polyacrylamide.
Soften precipitation unit：Pretreatment production water is passed through softening sedimentation basin, according to the calcium of pretreatment unit water outlet it is hard and The dosage of total hard regulating agent, and the pH to 10.9 of the solubility product constant regulating water quality according to each material, softened generation For precipitation by pipeline to limestone pulping pond, medicament is soda ash.
Advanced treatment unit：Soften precipitation unit water outlet by entering ion-exchanger, mechanical mistake after mechanical filter equipment Filter equipment and the backwash water of ion-exchanger are back to regulating box；The production water of ion-exchanger is reverse osmosis through entering after hyperfiltration treatment System, production water need to add fungicide before entering ultrafiltration system, need to add antisludging agent before into counter-infiltration system, ultrafiltration is set Standby and reverse osmosis equipment backwash water is back to regulating box, and reverse osmosis produced water then is led to production pond so as to be back to production system In, reverse osmosis concentrated water further circulates concentration into electrodialysis system, treats that the concentrated water in electrodialysis plant is concentrated into containing for 27g/L Enter evaporative crystallization unit during salt amount, fresh water leads to production pond.
Evaporative crystallization unit：Electrodialysis concentrated water introducing MVR evaporators are evaporated crystallization, it is to be concentrated to after 120g/L, Freezing denitrification apparatus (0 DEG C) is entered by crystal separator, saltcake is separated out after chilled processing, the concentrated water for isolating saltcake is passed through Spray drying system, obtains crystallization carnallite, periodically outward transport after spray-dried processing.
Sludge treating block：Sludge-tank is introduced to the sludge that flocculation tanks produce, in the case where adding dehydrating agent through sludge Dehydration device is dehydrated, and fuel is recycled as after desiccation；Dehydrating agent is commercially available cationic polyacrylamide.
Embodiment 3
A kind of power plant desulfurization wastewater treatment zero draining integrated approach, including：
Pretreatment unit：Desulfurization wastewater is entered into three headers, pH regulating boxs add antalkali, and reaction chamber adds vulcanization Agent, flocculation tanks add flocculant, coagulant, and the sludge produced in flocculation tanks introduces sludge-tank by pipeline, and antalkali is stone Grey breast；Vulcanizing agent is organic sulfur TMT-15；Flocculant is commercially available polyaluminium chloride, and flocculation aid is polyacrylamide.
Soften precipitation unit：Pretreatment production water is passed through softening sedimentation basin, according to the calcium of pretreatment unit water outlet it is hard and The dosage of total hard regulating agent, and the pH to 10.85 of the solubility product constant regulating water quality according to each material, softened generation For precipitation by pipeline to limestone pulping pond, medicament is caustic soda.
Advanced treatment unit：Soften precipitation unit water outlet by entering ion-exchanger, mechanical mistake after mechanical filter equipment Filter equipment and the backwash water of ion-exchanger are back to regulating box；The production water of ion-exchanger is reverse osmosis through entering after hyperfiltration treatment System, production water need to add fungicide before entering ultrafiltration system, need to add antisludging agent before into counter-infiltration system, ultrafiltration is set Standby and reverse osmosis equipment backwash water is back to regulating box, and reverse osmosis produced water then is led to production pond so as to be back to production system In, reverse osmosis concentrated water further circulates concentration into electrodialysis system, treats that the concentrated water in electrodialysis plant is concentrated into containing for 25g/L Enter evaporative crystallization unit during salt amount, fresh water leads to production pond.
Evaporative crystallization unit：Electrodialysis concentrated water introducing MVR evaporators are evaporated crystallization, it is to be concentrated to after 110g/L, Freezing denitrification apparatus (- 5 DEG C) is entered by crystal separator, saltcake is separated out after chilled processing, the concentrated water for isolating saltcake is led to Enter spray drying system, crystallization carnallite is obtained after spray-dried processing, periodically outward transport.
Sludge treating block：Sludge-tank is introduced to the sludge that flocculation tanks produce, in the case where adding dehydrating agent through sludge Dehydration device is dehydrated, and fuel is recycled as after desiccation；Dehydrating agent is commercially available cationic polyacrylamide.
Embodiment 4
The present embodiment is certain accurate eastern power plant desulfurization wastewater water quality of Xinjiang, the results are shown in Table 1：
1 water quality detection result of table
Water quality is handled using the method for embodiment 3, testing result is shown in Table 2：
Water quality detection result after the processing of table 2
Sequence number Analysis project Unit Water quality requirement after processing
1 Appearance / Water white transparency
2 Turbidity NTU ＜ 5
3 PH value / 6-8
4 Electrical conductivity, 25 DEG C μs/cm ＜ 1500
5 Full basicity (with calcium carbonate) mmol/L ＜ 3
6 Phenolphthalein alkalinity (with calcium carbonate) mmol/L 0
7 Hardness (in terms of calcium ion) mmol/L ＜ 7
8 Chlorine root mg/L ＜ 300
GB50050-2007 can be reached by the processed water of method of the present invention《Industrial circulating cooling water processing design Specification》The standard of recycled water, uses available for recirculated water.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (10)

  1. A kind of 1. power plant desulfurization wastewater zero-discharge treatment system, it is characterised in that including：
    Pretreatment unit：Adjusted and flocculated pretreatment for carrying out pH to desulfurization wastewater；
    Soften precipitation unit：For softening to pretreated desulfurization wastewater；
    Advanced treatment unit：For carrying out ion exchange, reverse-osmosis treated and electrodialysis process to the desulfurization wastewater after softening, with Obtain fresh water and concentrated water；
    Evaporative crystallization unit：For concentrated water to be evaporated crystallization, spray drying treatment to obtain carnallite；
    Sludge treating block：The sludge that processing system is produced introduces sludge-tank, is taken off in the case where adding dehydrating agent through sludge Water installations are dehydrated, and fuel is recycled as after desiccation.
  2. A kind of 2. power plant desulfurization wastewater zero-discharge treatment system according to claim 1, it is characterised in that the pretreatment Unit includes pH regulating boxs, reaction chamber and flocculation tanks, and the flocculation tanks connect cesspool.
  3. 3. a kind of power plant desulfurization wastewater zero-discharge treatment system according to claim 1, it is characterised in that the softening is heavy Shallow lake unit includes softening sedimentation basin and limestone pulping pond.
  4. A kind of 4. power plant desulfurization wastewater zero-discharge treatment system according to claim 1, it is characterised in that the depth Reason unit includes mechanical filter equipment, ion-exchanger, ultrafiltration apparatus, reverse osmosis equipment and electrodialysis plant, described reverse osmosis Equipment and electrodialysis plant are all connected with production pond.
  5. A kind of 5. power plant desulfurization wastewater zero-discharge treatment system according to claim 1, it is characterised in that the evaporation knot Brilliant unit includes MVR evaporators, freezing denitrification apparatus and spray-drying installation.
  6. 6. a kind of power plant desulfurization wastewater zero-discharge treatment system according to claim 1, it is characterised in that at the sludge Reason unit includes sludge-tank and sludge dehydration device.
  7. 7. a kind of power plant desulfurization wastewater Zero discharge treatment method according to claim 1, it is characterised in that method and step is such as Under：
    S1：Power plant desulfurization wastewater is passed through the pretreatment unit, successively by pH regulating boxs, reaction chamber and the flocculation tanks, The precipitation that flocculation tanks are obtained is discharged into sludge-tank, is dehydrated through sludge dehydration device, and fuel is recycled as after desiccation；
    S2：The water outlet that flocculation tanks in S1 obtain is passed through softening sedimentation basin, medicament is added and adjusts the water hardness, softened generation is sunk Shallow lake is discharged into limestone pulping pond；
    S3：The water outlet for softening precipitation unit in S2 is passed through the advanced treatment unit, successively by mechanical filter equipment, ion Exchanger, ultrafiltration apparatus, reverse osmosis equipment and electrodialysis plant, the fresh water obtained by electrodialysis plant lead to production pond；
    S4：The concentrated water that electrodialysis plant in S3 obtains is passed through the evaporative crystallization unit, successively by MVR evaporators and freezing Denitrification apparatus, saltcake is separated out after chilled processing, and the concentrated water for isolating saltcake is passed through spray drying system, spray-dried place Crystallization carnallite is obtained after reason.
  8. 8. a kind of power plant desulfurization wastewater Zero discharge treatment method according to claim 7, it is characterised in that electric in the S3 The salt content for the concentrated water that electrodialysis equipment obtains is 23-27g/L.
  9. 9. a kind of power plant desulfurization wastewater Zero discharge treatment method according to claim 5, it is characterised in that passed through in the S4 The salt content for the concentrated water that MVR evaporators obtain is 100-120g/L.
  10. 10. a kind of power plant desulfurization wastewater Zero discharge treatment method according to claim 5, it is characterised in that in the S4 The temperature for freezing denitrification apparatus is -10-0 DEG C.
CN201711078411.2A 2017-11-06 2017-11-06 A kind of power plant desulfurization wastewater zero-discharge treatment system and method Pending CN107902826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711078411.2A CN107902826A (en) 2017-11-06 2017-11-06 A kind of power plant desulfurization wastewater zero-discharge treatment system and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711078411.2A CN107902826A (en) 2017-11-06 2017-11-06 A kind of power plant desulfurization wastewater zero-discharge treatment system and method

Publications (1)

Publication Number Publication Date
CN107902826A true CN107902826A (en) 2018-04-13

Family

ID=61842535

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711078411.2A Pending CN107902826A (en) 2017-11-06 2017-11-06 A kind of power plant desulfurization wastewater zero-discharge treatment system and method

Country Status (1)

Country Link
CN (1) CN107902826A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108751577A (en) * 2018-05-26 2018-11-06 江苏源拓环境科技有限公司 A kind of coal chemical industry waste water near-zero release tail water processing method
CN109650636A (en) * 2018-12-26 2019-04-19 国电新能源技术研究院有限公司 A kind of brine waste processing system
CN110171893A (en) * 2019-06-26 2019-08-27 西安热工研究院有限公司 A kind of full factory waste water zero discharge system and method for water resource of reclaimed water plant gas
CN112624476A (en) * 2020-12-28 2021-04-09 西安西热控制技术有限公司 Tail end waste water salt separation crystallization system of thermal power plant
CN115636550A (en) * 2022-11-14 2023-01-24 新疆水处理工程技术研究中心有限公司 MVR evaporation crystallization mother liquor reduction and disposal system and disposal method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101746874A (en) * 2010-02-04 2010-06-23 武汉中新化工有限公司 Processing method of wastewater desulfurized by fume wet method
CN205011545U (en) * 2015-09-28 2016-02-03 张博 Desulfurization waste water resourceful treatment device
CN106430794A (en) * 2016-12-20 2017-02-22 大唐国际化工技术研究院有限公司 Resourceful treatment method and treatment system for desulfuration wastewater
CN106746115A (en) * 2016-12-20 2017-05-31 大唐国际化工技术研究院有限公司 Desulfurization wastewater recycling processing method and processing system
CN106830479A (en) * 2017-01-11 2017-06-13 中国华能集团清洁能源技术研究院有限公司 Using flue gas and electrodialytic desulfurization wastewater zero-discharge treatment system and method
CN206570143U (en) * 2016-12-23 2017-10-20 天海能源科技有限公司 A kind of desulfurization wastewater is recycled and Zero discharging system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101746874A (en) * 2010-02-04 2010-06-23 武汉中新化工有限公司 Processing method of wastewater desulfurized by fume wet method
CN205011545U (en) * 2015-09-28 2016-02-03 张博 Desulfurization waste water resourceful treatment device
CN106430794A (en) * 2016-12-20 2017-02-22 大唐国际化工技术研究院有限公司 Resourceful treatment method and treatment system for desulfuration wastewater
CN106746115A (en) * 2016-12-20 2017-05-31 大唐国际化工技术研究院有限公司 Desulfurization wastewater recycling processing method and processing system
CN206570143U (en) * 2016-12-23 2017-10-20 天海能源科技有限公司 A kind of desulfurization wastewater is recycled and Zero discharging system
CN106830479A (en) * 2017-01-11 2017-06-13 中国华能集团清洁能源技术研究院有限公司 Using flue gas and electrodialytic desulfurization wastewater zero-discharge treatment system and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李月红主编: "《化工原理（第二版）》", 31 January 2009 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108751577A (en) * 2018-05-26 2018-11-06 江苏源拓环境科技有限公司 A kind of coal chemical industry waste water near-zero release tail water processing method
CN109650636A (en) * 2018-12-26 2019-04-19 国电新能源技术研究院有限公司 A kind of brine waste processing system
CN110171893A (en) * 2019-06-26 2019-08-27 西安热工研究院有限公司 A kind of full factory waste water zero discharge system and method for water resource of reclaimed water plant gas
CN112624476A (en) * 2020-12-28 2021-04-09 西安西热控制技术有限公司 Tail end waste water salt separation crystallization system of thermal power plant
CN115636550A (en) * 2022-11-14 2023-01-24 新疆水处理工程技术研究中心有限公司 MVR evaporation crystallization mother liquor reduction and disposal system and disposal method thereof

Similar Documents

Publication Publication Date Title
CN107902826A (en) A kind of power plant desulfurization wastewater zero-discharge treatment system and method
CN108529802B (en) Zero-discharge process for discharging high-salt-content wastewater in titanium dioxide production
CN104276708B (en) A kind of power plant effluent Zero-discharge treating process
WO2017133511A1 (en) Treatment apparatus and method for zero liquid discharge of desulfurization wastewater
WO2017133512A1 (en) Treatment apparatus and method for zero liquid discharge of desulfurization wastewater
CN105906125B (en) A kind of desulfurization wastewater recycling processing method
CN105621742B (en) Desulfurization wastewater sofening treatment device and method
CN106430786B (en) Desulfurization wastewater treatment method and device
CN105439358A (en) Method and device for realizing zero discharge of desulfurization wastewater
CN110655258A (en) Novel integrated treatment system and process for zero discharge of high-salinity wastewater in coal chemical industry
CN105540960A (en) Treatment method and treatment system for wastewater produced during flue gas desulfurization adopting limestone/lime-gypsum method
CN109384332A (en) A kind of method of coal burning flue gas desulfurization wastewater treatment
CN205556348U (en) Desulfurization waste water zero release processing apparatus
CN110540332B (en) Fluorine-containing and chlorine-containing sewage treatment process
CN205653287U (en) Device that zero release of desulfurization waste water was handled
CN204185326U (en) A kind of power plant desulfurization Wastewater zero-discharge treatment system
CN107089744A (en) A kind of method of desulfurization wastewater advanced treating zero-emission
CN112047553A (en) PTA high-salinity wastewater treatment, reuse and zero-discharge system and method
CN107473478B (en) Recycling treatment process for process wastewater generated in wet-process preparation of brominated butyl rubber
CN106746108A (en) A kind of desulfurization wastewater recycling treatment system and method
CN205222911U (en) Zero release of coal industry strong brine and salt manufacturing device
CN204434415U (en) Concentrating and treating system is softened in a kind of heat-engine plant desulfurized Wastewater by Electric dialysis
CN204939142U (en) Treatment facility of desulfurization waste water that flue gas desulfurization system discharged
CN209507610U (en) High-salt wastewater divides salt system
CN105439346A (en) Auto-precipitation pretreatment method of high-salt wastewater

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information

Address after: 1202, Dachong building, No. 2009, Shahe West Road, Dachong community, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province

Applicant after: Shenzhen Delan ecological environment Co., Ltd.

Address before: The 830001 the Xinjiang Uygur Autonomous Region Urumqi high tech Industrial Development Zone (new city) north Dongrong Street No. 567 building eleven floor, South Tower of high-tech talent

Applicant before: Xinjiang Environmental Engineering Technology Co., Ltd.

CB02 Change of applicant information
RJ01 Rejection of invention patent application after publication

Application publication date: 20180413

RJ01 Rejection of invention patent application after publication