CN104874481A - Wet type electrostatic dust collector for semidry method (CFB) waste water zero discharging - Google Patents
Wet type electrostatic dust collector for semidry method (CFB) waste water zero discharging Download PDFInfo
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- CN104874481A CN104874481A CN201510360147.6A CN201510360147A CN104874481A CN 104874481 A CN104874481 A CN 104874481A CN 201510360147 A CN201510360147 A CN 201510360147A CN 104874481 A CN104874481 A CN 104874481A
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Abstract
The invention discloses a wet type electrostatic dust collector for semidry method (CFB) waste water zero discharging. The wet type electrostatic dust collector comprises a smoke humidification device, a wet type electrostatic smoke purifying system and a waste water circulating utilizing system. The wet type smoke purifying system mainly comprises a spraying device, an anode plate and a cathode wire. The waste water circulating utilizing system comprises a waste water tank, a circulation water tank, a waste water pump, a circulation water pump, an alkali liquor tank, an alkaline pump, an automatic filter, a technology water tank and a technology water pump. By means of the wet type electrostatic dust collector, tiny dust, SO3, heavy metal and the like in smoke can be efficiently removed, meanwhile, waste water zero discharging is achieved, environmental friendliness is achieved, and good economic benefits and social benefits are achieved.
Description
Technical field
The invention belongs to coal-fired plant flue gas purification techniques field, particularly one is used for semidry method (CFB) wastewater zero discharge wet cottrell.
Background technology
The pollutant that coal-burning power plant and Industrial Boiler produce is the main source of air environmental pollution, and the regulation dust emission limit value of up-to-date ultra-clean discharge standard reaches 5mg/Nm
3, traditional dry electric precipitation device has not reached this discharge standard.Wet electrical dust precipitator adopts the mode antianode plate of Water spray to carry out deashing, and to the removal efficiency of acid mist, toxic heavy metal, especially PM2.5 all higher than 95%, dust emission concentration is lower than 5mg/Nm
3.
Desulfurization absorption and the product process of semidry method (CFB) are all carried out under dry state, this method have discharge without sewage spent acid, equipment corrosion degree is comparatively light, flue gas in purification process without significant hypothermal, be beneficial to chimney exhaust diffusion, the secondary pollution advantage such as less.Semidry method (CFB) exit gas temperature is 70-90 DEG C, higher than wet desulfurization system (<70 DEG C), and be dry flue gas, do not meet the requirement of existing wet electrical dust precipitator entrance, therefore existing wet electrical dust precipitator cannot be applied to the power plant adopting semi-dry process flue gas desulphurization system (CFB).In addition, affect secondary pollution and water consumption problem that wet electrical dust precipitator application also has water, do not solve cycling utilization of wastewater problem, wet electrical dust precipitator is just difficult to apply in coal-burning power plant.The water of discharging after wet electrical dust precipitator spray irrigation, containing a large amount of acidic materials and fine particulates, direct discharge can produce secondary pollution, and water consumption is large, operating cost is high, and water must recycle.Therefore, be necessary very much to develop a kind of New type wet electric cleaner, the power plant adopting semi-dry process flue gas desulphurization system (CFB) can be applied to, realize cycling utilization of wastewater simultaneously, reach the requirement of wastewater zero discharge.
Summary of the invention
The object of the invention is to just to the deficiencies in the prior art, provide a kind of for semidry method (CFB) wastewater zero discharge wet cottrell, the present invention can fine solid particle, SO in efficient removal flue gas
3,heavy metals etc., realize wastewater zero discharge simultaneously, environmentally friendly, have good economic benefit and social benefit.
For achieving the above object, the present invention is by the following technical solutions:
A kind of for semidry method (CFB) wastewater zero discharge wet cottrell, comprise flue gas humidifying device, wet electrostatic flue gas purification system, wastewater recycling system, described Wet smoke cleaning system comprises spray equipment, positive plate, cathode line, described waste water circulation system comprises waste water tank, cyclic water tank, industrial water tank, lye tank, waste water pump, water circulating pump, industrial water pump, lye pump and automatic filter, described humidifying device is positioned on the gas approach of wet electrostatic flue gas purification system, and be communicated with the delivery port of automatic filter by pipeline, described Wet smoke cleaning system at least comprises two pieces of positive plates vertically be arranged in parallel, cathode line is equipped with between described positive plate, spray equipment is provided with above described Wet smoke cleaning system electric field, described spray equipment is divided into Part I and Part II, the spray equipment of described Part I is positioned at the top of Wet smoke cleaning system outlet side, be communicated with industrial water tank with pipeline by industrial water pump, the spray equipment of described Part II is positioned at the top of Wet smoke cleaning system entrance side, be communicated with the delivery port of automatic filter by pipeline, the water inlet of described waste water tank is communicated with the discharge of wastewater mouth of Wet smoke cleaning system by pipeline, the clarified solution delivery port on waste water tank top is communicated with the water inlet of cyclic water tank by pipeline, the precipitation solution delivery port of waste water tank bottom is communicated with waste water pump by pipeline, the delivery port of described cyclic water tank is communicated with water circulating pump by pipeline, and cyclic water tank is also communicated with water for industrial use water source by pipeline, described water circulating pump is communicated with the water inlet of automatic filter by pipeline, described industrial water tank is communicated with water for industrial use water source by pipeline, the delivery port of described lye tank is by the alkali lye inlet communication of lye pump and pipeline and cyclic water tank.
Further, described humidifying device adopts two-fluid spray nozzle.
Further, in described lye tank, solution is NaOH solution.
Compared with prior art, the present invention adopts flue gas humidifying device, sprays at wet electrostatic flue gas purification system entrance, decreasing temperature and increasing humidity is carried out to high-temperature flue gas, flue gas is reached capacity even hypersaturated state, makes condensable particle generation condensation growth, be removed further, can SO be realized simultaneously
3cooperation-removal.The present invention adopts wastewater recycling system, recycles treated recirculated water, greatly reduces the water consumption cost of wet electrical dust precipitator and prevents waste water from occurring secondary pollution; The outer draining of waste water pump can do the multistage humidification water of semidry method (CFB), dust-laden waste water is used for the humidification being used for desulfurizing agent in semi-dry desulphurization system, to improve semi-dry desulphurization system pollutant desulfuration efficiency, realize wastewater zero discharge, avoid the problem of wastewater treatment, the water outlet of waste water pump can enter semidry method CFB, as multistage humidification water.And the efficient fine solid particle of the present invention, heavy metal Hg and SO
3, NH
4deng the aerosol formed, reduce desulfurizing tower outlet Pollutant emission concentration, reach up-to-date discharge standard.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
In figure: 1, flue gas humidifying device, 2, wet electrostatic flue gas purification system, 3, wastewater recycling system, 4, spray equipment, 5, positive plate, 6, cathode line, 7, waste water tank, 8, cyclic water tank, 9, industrial water tank, 10, lye tank, 11, waste water pump, 12, water circulating pump, 13, industrial water pump, 14, lye pump, 15, automatic filter.
Detailed description of the invention
Further illustrate the present invention below in conjunction with accompanying drawing, object of the present invention and effect will become more obvious;
Embodiment: a kind of for semidry method (CFB) wastewater zero discharge wet cottrell, comprises flue gas humidifying device 1, wet electrostatic flue gas purification system 2, wastewater recycling system 3, Wet smoke cleaning system 2 mainly comprises spray equipment 4, positive plate 5, cathode line 6, waste water circulation system 3 comprises waste water tank 7, cyclic water tank 8, industrial water tank 9, lye tank 10, waste water pump 11, water circulating pump 12, industrial water pump 13, lye pump 14 and automatic filter 15, humidifying device 1 is positioned on the gas approach of wet electrostatic flue gas purification system 2, and be communicated with by the delivery port of pipeline with automatic filter 15, Wet smoke cleaning system 2 comprises two pieces of positive plates vertically be arranged in parallel 5, cathode line 6 is equipped with between positive plate, spray equipment 4 is provided with above Wet smoke cleaning system 2 electric field, spray equipment 4 is divided into Part I and Part II, the spray equipment of Part I is positioned at the top of Wet smoke cleaning system 2 outlet side, be communicated with industrial water tank 9 with pipeline by industrial water pump 13, the spray equipment of Part II is positioned at the top of Wet smoke cleaning system 2 entrance side, be communicated with by the delivery port of pipeline with automatic filter 15, the water inlet of waste water tank 7 is communicated with the discharge of wastewater mouth of Wet smoke cleaning system 2 by pipeline, the clarified solution delivery port on waste water tank 7 top is communicated with by the water inlet of pipeline with cyclic water tank 8, the precipitation solution delivery port of waste water tank 7 bottom is communicated with waste water pump 11 by pipeline, the delivery port of cyclic water tank 8 is communicated with water circulating pump 12 by pipeline, and cyclic water tank 8 is also communicated with water for industrial use water source by pipeline, water circulating pump 12 is communicated with by the water inlet of pipeline with automatic filter 15, industrial water tank 9 is communicated with water for industrial use water source by pipeline, the delivery port of lye tank 10 passes through the alkali lye inlet communication of lye pump 14 and pipeline and cyclic water tank 8, and humidifying device 1 adopts two-fluid spray nozzle, and in lye tank 10, solution is NaOH solution.
Implementation process of the present invention is as follows:
Flue gas enters from wet electrostatic flue gas purification system smoke inlet, in gas approach, flue gas humidifying device sprays misty liquid droplets to flue gas, and flue gas is reached capacity even hypersaturated state, in flue gas, condensable particle is condensed into the bulky grain being conducive to removing, and flue-gas temperature reduces simultaneously; Flue gas is by the electric field of wet-esp flue gas purification system subsequently, the fine solid particle in flue gas, heavy metal and SO
3etc. being removed, complete gas cleaning, final purification flue gas wet electrostatic flue gas purification system exhanst gas outlet drains into chimney.
Arrange spray equipment above Wet smoke cleaning system electric field, form continuous print moisture film on positive plate surface, the dust of polar board surface and acid mist etc. are rinsed well together; The sanitary industrial water of water only for being provided by industrial water pump by industrial water tank of the Part II spray equipment spray of spray equipment, guarantee that the flushing water of flue gas afterbody is supplementary new water all the time, avoid the flue gas of a small amount of suspension to Wet smoke cleaning system outlet side remaining in recirculated water to cause secondary pollution, improve efficiency of dust collection further.
First Wet smoke cleaning system flushing waste water enters waste water tank and carries out preliminary sedimentation separation, and the clarified solution on waste water tank top enters cyclic water tank, in cyclic water tank by from the NaOH solution of lye tank and, cyclic water tank regular replenishment water for industrial use.Recirculated water passes through automatic filter subsequently, after filtering, a part recirculated water enter flue gas humidifying device for give flue gas humidifying cooling, another part is for rinsing positive plate and the cathode line of Wet smoke cleaning system smoke inlet side, thus realize recycling of waste water, greatly reduce the water consumption cost of wet electrical dust precipitator and prevent waste water from occurring secondary pollution; Waste water tank bottom concentrates waste water and enters the humidification of semi-dry desulphurization system (CFB) for desulfurizing agent, to improve semi-dry desulphurization system pollutant desulfuration efficiency, realizes wastewater zero discharge, avoids the problem of wastewater treatment.
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (3)
1. for semidry method (CFB) wastewater zero discharge wet cottrell, it is characterized in that, comprise flue gas humidifying device (1), wet electrostatic flue gas purification system (2), wastewater recycling system (3), described Wet smoke cleaning system (2) comprises spray equipment (4), positive plate (5), cathode line (6), described waste water circulation system (3) comprises waste water tank (7), cyclic water tank (8), industrial water tank (9), lye tank (10), waste water pump (11), water circulating pump (12), industrial water pump (13), lye pump (14) and automatic filter (15), described humidifying device (1) is positioned on the gas approach of wet electrostatic flue gas purification system (2), and be communicated with by the delivery port of pipeline with automatic filter (15), described Wet smoke cleaning system (2) at least comprises two pieces of positive plates vertically be arranged in parallel (5), cathode line (6) is equipped with between described positive plate, spray equipment (4) is provided with above described Wet smoke cleaning system (2) electric field, described spray equipment (4) is divided into Part I and Part II, the spray equipment of described Part I is positioned at the top of Wet smoke cleaning system (2) outlet side, be communicated with industrial water tank (9) with pipeline by industrial water pump (13), the spray equipment of described Part II is positioned at the top of Wet smoke cleaning system (2) entrance side, be communicated with by the delivery port of pipeline with automatic filter (15), the water inlet of described waste water tank (7) is communicated with by the discharge of wastewater mouth of pipeline with Wet smoke cleaning system (2), the clarified solution delivery port on waste water tank (7) top is communicated with by the water inlet of pipeline with cyclic water tank (8), the precipitation solution delivery port of waste water tank (7) bottom is communicated with waste water pump (11) by pipeline, the delivery port of described cyclic water tank (8) is communicated with water circulating pump (12) by pipeline, and cyclic water tank (8) is also communicated with water for industrial use water source by pipeline, described water circulating pump (12) is communicated with by the water inlet of pipeline with automatic filter (15), described industrial water tank (9) is communicated with water for industrial use water source by pipeline, the delivery port of described lye tank (10) passes through the alkali lye inlet communication of lye pump (14) and pipeline and cyclic water tank (8).
2. one according to claim 1 is used for semidry method (CFB) wastewater zero discharge wet cottrell, it is characterized in that, described humidifying device (1) adopts two-fluid spray nozzle.
3. one according to claim 1 is used for semidry method (CFB) wastewater zero discharge wet cottrell, and it is characterized in that, described lye tank (10) interior solution is NaOH solution.
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| CN201510360147.6A CN104874481A (en) | 2015-06-26 | 2015-06-26 | Wet type electrostatic dust collector for semidry method (CFB) waste water zero discharging |
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| CN201510360147.6A CN104874481A (en) | 2015-06-26 | 2015-06-26 | Wet type electrostatic dust collector for semidry method (CFB) waste water zero discharging |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344475A (en) * | 2015-11-24 | 2016-02-24 | 山东信发环保工程有限公司 | Dry-wet mixed type electrostatic precipitator and working method thereof |
| CN105457427A (en) * | 2015-12-21 | 2016-04-06 | 黄河科技学院 | Air-purifying system for clearing haze in urban residential area |
| CN105546686A (en) * | 2015-12-21 | 2016-05-04 | 黄河科技学院 | City and town air purification layout system |
| CN105617803A (en) * | 2015-12-21 | 2016-06-01 | 黄河科技学院 | Urban road electrostatic dust removal street lamp system |
| CN106391311A (en) * | 2016-10-28 | 2017-02-15 | 杭州红山热电有限公司 | Boiler dust removing and conveying system |
| CN106540810A (en) * | 2016-10-28 | 2017-03-29 | 杭州红山热电有限公司 | A kind of boiler dusting circulating treating system |
| CN107149858A (en) * | 2017-07-10 | 2017-09-12 | 杭州天明环保工程有限公司 | Circulation for plasma fume treatment integrated apparatus |
| CN108043585A (en) * | 2018-01-22 | 2018-05-18 | 浙江南源环境工程技术有限公司 | Wet cottrell prevents electric field flashover adjustment control membrane system |
| CN109261357A (en) * | 2018-10-17 | 2019-01-25 | 浙江德创环保科技股份有限公司 | A kind of wet electrical dust precipitator |
| CN111729760A (en) * | 2020-05-19 | 2020-10-02 | 浙江菲达环保科技股份有限公司 | SO is reinforceed in step degree of depth cooling phase transition3Wet electric dust collector for reunion removal |
| CN112628781A (en) * | 2020-12-29 | 2021-04-09 | 四川天壹环保科技有限公司 | Dry-type deacidification cooling equipment |
| CN112973407A (en) * | 2021-02-03 | 2021-06-18 | 浙江天蓝环保技术股份有限公司 | Deodorization system and process for efficient absorption of waste gas and synergistic free radical oxidation |
| CN113264610A (en) * | 2021-05-26 | 2021-08-17 | 马鞍山钢铁股份有限公司 | Wet-type electric dust removal water supply system and water supply method for gas turbine generator set |
| CN114308386A (en) * | 2021-12-21 | 2022-04-12 | 深圳市天得一环境科技有限公司 | Dust electrostatic recovery device |
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Cited By (18)
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| CN105344475A (en) * | 2015-11-24 | 2016-02-24 | 山东信发环保工程有限公司 | Dry-wet mixed type electrostatic precipitator and working method thereof |
| CN105457427B (en) * | 2015-12-21 | 2017-11-03 | 黄河科技学院 | The air cleaning system of haze is removed for urban construction cell |
| CN105457427A (en) * | 2015-12-21 | 2016-04-06 | 黄河科技学院 | Air-purifying system for clearing haze in urban residential area |
| CN105546686A (en) * | 2015-12-21 | 2016-05-04 | 黄河科技学院 | City and town air purification layout system |
| CN105617803A (en) * | 2015-12-21 | 2016-06-01 | 黄河科技学院 | Urban road electrostatic dust removal street lamp system |
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| CN106391311A (en) * | 2016-10-28 | 2017-02-15 | 杭州红山热电有限公司 | Boiler dust removing and conveying system |
| CN106540810A (en) * | 2016-10-28 | 2017-03-29 | 杭州红山热电有限公司 | A kind of boiler dusting circulating treating system |
| CN106391311B (en) * | 2016-10-28 | 2019-05-07 | 杭州红山热电有限公司 | Boiler dusting ash-transmission system |
| CN107149858A (en) * | 2017-07-10 | 2017-09-12 | 杭州天明环保工程有限公司 | Circulation for plasma fume treatment integrated apparatus |
| CN108043585A (en) * | 2018-01-22 | 2018-05-18 | 浙江南源环境工程技术有限公司 | Wet cottrell prevents electric field flashover adjustment control membrane system |
| CN109261357A (en) * | 2018-10-17 | 2019-01-25 | 浙江德创环保科技股份有限公司 | A kind of wet electrical dust precipitator |
| CN111729760A (en) * | 2020-05-19 | 2020-10-02 | 浙江菲达环保科技股份有限公司 | SO is reinforceed in step degree of depth cooling phase transition3Wet electric dust collector for reunion removal |
| CN112628781A (en) * | 2020-12-29 | 2021-04-09 | 四川天壹环保科技有限公司 | Dry-type deacidification cooling equipment |
| CN112628781B (en) * | 2020-12-29 | 2022-11-11 | 四川天壹环保科技有限公司 | Dry-type deacidification cooling equipment |
| CN112973407A (en) * | 2021-02-03 | 2021-06-18 | 浙江天蓝环保技术股份有限公司 | Deodorization system and process for efficient absorption of waste gas and synergistic free radical oxidation |
| CN113264610A (en) * | 2021-05-26 | 2021-08-17 | 马鞍山钢铁股份有限公司 | Wet-type electric dust removal water supply system and water supply method for gas turbine generator set |
| CN114308386A (en) * | 2021-12-21 | 2022-04-12 | 深圳市天得一环境科技有限公司 | Dust electrostatic recovery device |
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