CN206940653U - Desulphurization for Coal-fired Power Plant waste water zero discharge device - Google Patents
Desulphurization for Coal-fired Power Plant waste water zero discharge device Download PDFInfo
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- CN206940653U CN206940653U CN201621384685.5U CN201621384685U CN206940653U CN 206940653 U CN206940653 U CN 206940653U CN 201621384685 U CN201621384685 U CN 201621384685U CN 206940653 U CN206940653 U CN 206940653U
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- waste water
- power plant
- coal
- desulphurization
- discharge device
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Classifications
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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
- 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
- C02F1/001—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
-
- 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
- C02F1/52—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
- C02F1/66—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
- 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
Abstract
The utility model provides a kind of Desulphurization for Coal-fired Power Plant waste water zero discharge device, it is characterised in that including the pretreatment module, hot method concentration module and flue spray drying module being sequentially connected.Pretreatment module carries out the separation of solid and liquid of waste water, and hot method concentration module carries out the concentration of waste water, and flue spray drying module is collected dry ash.Device energy 100% recycles desulfurization wastewater, and small investment, operating cost is low, meets the actual requirement of energy-conserving and environment-protective.
Description
Technical field
The utility model discloses a kind of Desulphurization for Coal-fired Power Plant waste water zero discharge device, can be in thermal power plants, metallurgy etc.
Applied in the discharge of industry desulfurization wastewater.
Background technology
What in April, 2015, State Council formally issued《Water prevention and cure of pollution action plan》I.e.《Ten, water》In, clearly propose
Heat-engine plant desulfurized waste water belongs to high pollution waste water, it is necessary to strict control and the requirement of typical industry wastewater zero discharge.Newly-built
Power plant's environmental impact assessment, environmental protection inspection and acceptance etc., which are distinctly claimed, must carry out wastewater zero discharge, no longer stay any standby floss hole, " forcing "
The problem of environmental protection pressure promotes power plant to must take into consideration zero-emission.Accelerate to implement depth water saving and " effluent sewage zero-emission " in coal-burning power plant
Turn into inevitable choice.
Desulfurization waste water quality is excessively poor and variation water quality is big, contains substantial amounts of sulfate radical, chlorion, calcium ions and magnesium ions and again
Metal etc., there is very strong contaminative to environment.Wherein many heavy metal ion are first that control is required in national environmental standard
Pollutant, it is therefore necessary to individually handled desulfurization wastewater.
Conventional desulfurization wastewater treatment system uses " three headers " chemical precipitation method, main turbidity, the huge sum of money for lowering waste water
Category and a small amount of hardness, reach industrial wastewater secondary discharge standard.Due to no reduction waste water salt content and chlorion, so that can not
Recycle.
The desulfurization wastewater zero-discharge technology implemented at present, mainly desulfurization wastewater evaporative crystallization technique and utilize fume afterheat
Handle desulfurization wastewater technology.The former is that desulfurization wastewater passes through pretreatment or without pretreatment, subsequently into multi-effect evaporator
(MED) or mechanical compress steam vaporizer (MVR/MVC) is concentrated, crystallized, and the fresh water reuse of evaporation, crystal salt is separately located
Put.The latter has two kinds of typical process routes, the first be desulfurization wastewater is pre-processed, bi-membrane method concentration decrement, recovery section is light
Water, then by concentrated water import air preheater after, before deduster between flue in, desulfurization wastewater is atomized using atomizer.
Second is that bypass flue gas is introduced before desulfurizing tower after deduster, and flue gas is directly contacted in concentration tower with desulfurization wastewater and changed
Heat, underflow liquid carry out separation of solid and liquid by filter press.
Evaporative crystallization method can reclaim industrial crystallization salt or solid waste from waste water, but invest huge, energy consumption and operation
It is costly, limit the popularization of the technology.
Fume afterheat is using the first thinking of technology using double film concentration technologies, and impact resistance is poor, to entering film water matter
It is required that high, processing requirement is very strict, while wants periodic cleaning membrane module, to avoid film surface contamination and fouling from blocking；Second
For the problems such as kind thinking equipment corrosion, liquid phase block than more prominent, maintenance workload is big.
The content of the invention
The purpose of this utility model is to provide a kind of Desulphurization for Coal-fired Power Plant waste water zero discharge device, and the device can be 100% time
Receipts utilize desulfurization wastewater, and small investment, operating cost is low, meets the actual requirement of energy-conserving and environment-protective.
In order to achieve the above object, the utility model provides a kind of Desulphurization for Coal-fired Power Plant waste water zero discharge device, and it is special
Sign is, including pretreatment module, hot method concentration module and the flue spray drying module being sequentially connected.
Preferably, described pretreatment module includes the wastewater equalization pond, the first reaction tank, the second reaction being sequentially connected
Pond, circulatory pool, tube type filter membrance filter and water tank with strainer.
It is highly preferred that described tube type filter membrance filter is connected to carry out chemistry to tube type filter membrance filter
The cleaning water tank of cleaning, cleaning water tank connecting pipe decline membrane filtration device.
It is highly preferred that the bottom of described circulatory pool is connected to carry out the dense of sludge condensation to the bottom waste water of circulatory pool
Contracting pond, the bottom connection dewaterer of concentration basin, the top connection wastewater equalization pond of concentration basin.
It is highly preferred that described hot method concentration module includes the Multi-effect concentration evaporator being connected with water tank with strainer, multiple-effect is dense
Contracting evaporator connection density wastewater pond.
It is highly preferred that described flue spray drying module includes the spraying system being located in flue, the spray of spraying system
Mouth is arranged in the flue between air preheater and electric cleaner, nozzle connection density wastewater pond.
It is highly preferred that the primary steam of described Multi-effect concentration evaporator is produced from unit flue residue heat through two-phase heat exchanger
Raw steam, low-quality steam or exhaust steam, or station-service electrical heating, make use of residual heat of electric power plant used heat, realize to greatest extent
Depth energy saving.
The utility model provides Desulphurization for Coal-fired Power Plant waste water zero discharge device, and the present apparatus can be divided into three big modules：Pre- place
Reason+hot method concentration+flue spray drying.Pretreatment module carries out the removing heavy metals of waste water, softening, except turbidity and except hardness, hot
Method concentration module carries out the concentration of waste water and the reuse of fresh water, and flue spray drying module carries out waste water spray drying and collected dry
Ash.Device energy 100% recycles desulfurization wastewater, and small investment, operating cost is low, meets the actual requirement of energy-conserving and environment-protective.
Compared with prior art, the beneficial effects of the utility model are：
1st, the utility model can solve the intractable problem of desulfurization wastewater；
2nd, the utility model can solve the problems, such as that desulfurization wastewater zero-emission cost is high, construction investment, operating cost and account for
Ground area is only the 1/3-1/4 of evaporative crystallization technique.
3rd, the utility model makes the final zero-emission of desulfurization wastewater, and 100% recycles, and saves power plant water, meets current
Energy-saving and emission-reduction policy.
Brief description of the drawings
The process flow diagram of Fig. 1 Desulphurization for Coal-fired Power Plant waste water zero discharge devices
Wherein：1 wastewater equalization pond, 2 first reaction tanks, 3 second reaction tanks, 4 circulatory pools, 5 tube type filter membrance filters,
6 water tank with strainer, 7 water tanks, 8 concentration basins, 9 dewaterers, 10 Multi-effect concentration evaporators, 11 density wastewater ponds, 12 nozzles.
Embodiment
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it is to be understood that reading the content of the utility model instruction
Afterwards, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this Shen
Please appended claims limited range.
Embodiment
As shown in figure 1, be Desulphurization for Coal-fired Power Plant waste water zero discharge device, including pretreatment module, the hot method being sequentially connected
Concentrate module and flue spray drying module.
Pretreatment module include be sequentially connected wastewater equalization pond 1, the first reaction tank 2, the second reaction tank 3, circulatory pool 4,
Tube type filter membrance filter 5 and water tank with strainer 6.Described tube type filter membrance filter 5 is connected to tube type filter membrance
Filter 5 carries out the cleaning water tank 7 of Chemical cleaning, and the cleaning connecting tube of water tank 7 declines membrane filtration device 5.Described circulation
The bottom in pond 4 is connected to carry out the bottom waste water of circulatory pool 4 concentration basin 8 of sludge condensation, and the bottom connection of concentration basin 8 is de-
Water dispenser 9, the top connection wastewater equalization pond 1 of concentration basin 8.Pretreatment module uses tube type filter membrance filter 5, instead of tradition
Clarification filtration technique, reduce the dosage of chemical reagent, improve pretreating effect, reduce and take up an area, reduce operating cost.
Hot method concentration module includes the Multi-effect concentration evaporator 10 being connected with water tank with strainer 6, and Multi-effect concentration evaporator 10 connects
Connect density wastewater pond 11.The spraying system that flue spray drying module is located in flue, the nozzle 12 of spraying system are arranged in sky in advance
In flue between device and electric cleaner, nozzle 12 connects density wastewater pond 11.Described pretreatment module, hot method concentration module and
Flue is spray-dried module and carries out Automatic Control by PLC control system, load variations that can be according to waste water during use, boiler
Flue-gas temperature and set different parameters, make up to optimal running effect.
In use, the desulfurization wastewater of Limestone-gypsum Wet Flue Gas Desulfurization Process system discharge initially enters wastewater equalization pond 1, waste water
After quenched tune amount the first reaction tank 2 and the second reaction tank 3 are sequentially entered through pump lifting.Calcium oxide is added in the first reaction tank 2
Medicament, sodium carbonate and sodium hydroxide medicament are added in the second reaction tank 3, makes the Ca in waste water2+, Mg2+, heavy metal ion etc.
Generate insoluble matter.Subsequent waste water enters circulatory pool 4, tube type filter membrance filter 5 is lifted into through pump, using big flow cross-flow
Filter type carries out separation of solid and liquid, and the water purification isolated enters water tank with strainer 6.Operation a period of time in addition, tube type filter membrance mistake
Chemical cleaning need to be carried out using the acid adding of water tank 7, alkali and oxidant medicament is cleaned by filtering the tube type filter membrance of device 5.With solid content
Raising, circulatory pool 4 need to quantify discharge bottom waste water enter concentration basin 8 carry out sludge condensation, the sludge after concentration is by sludge pump
It is sent into dewaterer 9 and carries out dewater treatment, supernatant is back to wastewater equalization pond, and mud cake can be transported outward or into Power Plant Ash slag bath.
Waste water into water tank with strainer 6 adds hydrochloric acid that to neutrality, the regulation of its pH value then is lifted into Multi-effect concentration by pump
Evaporator 10.The primary steam of Multi-effect concentration evaporator 10 is from unit to the low-grade steam after electric duster ash bucket heating.
And fresh water caused by enrichment facility can be back to power plant's industrial water system.Multi-effect concentration evaporator is by multiple steamings for being serially connected
Device composition is sent out, primary steam is introduced into first evaporator, heats waste water therein, produce waste water lower than vapor (steam) temperature several
Equivalent evaporation.Caused steam is introduced into the second effect as heating steam, makes the waste water of the second effect with lower than the first effect
Temperature is evaporated.This process repeats to last effect always.First effect condensed water is returned at thermal source, and remaining is respectively imitated condensate and collects conjunction
And exported afterwards as fresh water.Meanwhile waste water, by being concentrated successively to most end effect by the first effect, concentrate is collected into density wastewater pond
11。
Quickly and completely vapour is injected in flue by nozzle 12 after density wastewater and the compressed air mixing in density wastewater pond 11
Change (suitably reduce flue-gas temperature, but do not influence back-end ductwork equipment runnability).After air preheater, the cigarette before electric cleaner
Desulfurization wastewater after road waste heat evaporation and concentration, appropriate increases smoke moisture, reduces flue-gas temperature, improves dedusting effect
Rate.After water vapour enters back-end ductwork with flue gas simultaneously, eventually as the moisturizing of desulfurizing tower；Dust one in solids and flue gas
Rise and trapped by deduster, carry out dry ash comprehensive utilization.Realize waste water 100% after flue residue heat is utilized and concentrated and be back to desulfurization
System.
Claims (7)
1. a kind of Desulphurization for Coal-fired Power Plant waste water zero discharge device, it is characterised in that including pretreatment module, the hot method being sequentially connected
Concentrate module and flue spray drying module.
2. Desulphurization for Coal-fired Power Plant waste water zero discharge device as claimed in claim 1, it is characterised in that described pretreatment module
Including wastewater equalization pond (1), the first reaction tank (2), the second reaction tank (3), circulatory pool (4), the tube type filter membrance being sequentially connected
Filter (5) and water tank with strainer (6).
3. Desulphurization for Coal-fired Power Plant waste water zero discharge device as claimed in claim 2, it is characterised in that described tube type filter membrance
Filter (5) is connected to carry out tube type filter membrance filter (5) the cleaning water tank (7) of Chemical cleaning, cleans water tank
(7) connecting tube declines membrane filtration device (5).
4. Desulphurization for Coal-fired Power Plant waste water zero discharge device as claimed in claim 2, it is characterised in that described circulatory pool (4)
Bottom be connected to carry out the bottom waste water of circulatory pool (4) concentration basin (8) of sludge condensation, the bottom of concentration basin (8) connects
Connect dewaterer (9), the top connection wastewater equalization pond (1) of concentration basin (8).
5. Desulphurization for Coal-fired Power Plant waste water zero discharge device as claimed in claim 2, it is characterised in that described hot method enrichment mode
Block includes the Multi-effect concentration evaporator (10) being connected with water tank with strainer (6), Multi-effect concentration evaporator (10) connection density wastewater pond
(11)。
6. Desulphurization for Coal-fired Power Plant waste water zero discharge device as claimed in claim 5, it is characterised in that described flue spraying is dry
Dry module includes the spraying system being located at, and the nozzle (12) of spraying system is arranged in the flue between air preheater and electric cleaner
It is interior, nozzle (12) connection density wastewater pond (11).
7. Desulphurization for Coal-fired Power Plant waste water zero discharge device as claimed in claim 5, it is characterised in that described Multi-effect concentration steams
The primary steam for sending out device (10) selects unit flue residue heat through steam, low-quality steam or exhaust steam caused by two-phase heat exchanger, or
Person's station-service electrical heating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621070975 | 2016-09-21 | ||
| CN2016210709752 | 2016-09-21 |
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| Publication Number | Publication Date |
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| CN206940653U true CN206940653U (en) | 2018-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621384685.5U Active CN206940653U (en) | 2016-09-21 | 2016-12-16 | Desulphurization for Coal-fired Power Plant waste water zero discharge device |
| CN201611173628.7A Pending CN106517628A (en) | 2016-09-21 | 2016-12-16 | Desulfurization-wastewater zero discharging device for coal-fired power plant |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611173628.7A Pending CN106517628A (en) | 2016-09-21 | 2016-12-16 | Desulfurization-wastewater zero discharging device for coal-fired power plant |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337245A (en) * | 2017-08-08 | 2017-11-10 | 北京尤科恩环保工程有限公司 | A kind of spraying system that desulfurization wastewater is concentrated using fume afterheat |
| CN107697967A (en) * | 2017-10-11 | 2018-02-16 | 江苏中建材环保研究院有限公司 | A kind of Desulphurization for Coal-fired Power Plant wastewater zero discharge system and method |
| CN107857321B (en) * | 2017-11-07 | 2021-01-08 | 西安协力动力科技有限公司 | Process for zero discharge treatment of wastewater of thermal power plant |
| CN109485114A (en) * | 2019-01-11 | 2019-03-19 | 众阿美科福斯特惠勒工程有限公司 | A kind of processing unit and method of catalytic cracking unit desulfurization wastewater and flue gas thermal coupling |
| CN110342714A (en) * | 2019-07-04 | 2019-10-18 | 华电电力科学研究院有限公司 | A kind of coal-burning power plant's process without drainage of waste water system and method based on semi-dry desulphurization technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105417817B (en) * | 2015-11-13 | 2018-08-10 | 高境 | A kind of high-salt wastewater processing system and method |
| CN105540977A (en) * | 2016-01-14 | 2016-05-04 | 中电环保股份有限公司 | Desulfurized waste water treatment method and system |
| CN105540930A (en) * | 2016-01-14 | 2016-05-04 | 海博伦（苏州）环境科技股份有限公司 | Power plant desulphurization wastewater zero-discharge treatment system |
| CN105692734A (en) * | 2016-03-30 | 2016-06-22 | 梁刚 | System and method for treating desulfurization wastewater concentrated solution |
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- 2016-12-16 CN CN201621384685.5U patent/CN206940653U/en active Active
- 2016-12-16 CN CN201611173628.7A patent/CN106517628A/en active Pending
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| CN106517628A (en) | 2017-03-22 |
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Address after: 200240 Shanghai city Minhang District Jianchuan Road No. 1115 Patentee after: SHANGHAI POWER EQUIPMENT Research Institute Address before: 200240 Shanghai city Minhang District Jianchuan Road No. 1115 Patentee before: SHANGHAI POWER EQUIPMENT Research Institute |