CN202683013U - High-efficiency wet electric precipitation and desulfurization system - Google Patents
High-efficiency wet electric precipitation and desulfurization system Download PDFInfo
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- CN202683013U CN202683013U CN 201220353952 CN201220353952U CN202683013U CN 202683013 U CN202683013 U CN 202683013U CN 201220353952 CN201220353952 CN 201220353952 CN 201220353952 U CN201220353952 U CN 201220353952U CN 202683013 U CN202683013 U CN 202683013U
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- desulfurizing tower
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Abstract
The utility model discloses a high-efficiency wet electric precipitation and desulfurization system. A wet electric precipitator is arranged above a demister in a desulfurizing tower, the demister is used to pre-remove fog drops and dust from clean flue gas, and the wet electric precipitator is used for precision treatment, so that a high environment-friendly emission requirement is met, the desulfurization efficiency is ensured, the efficiency of a dust removal system of the desulfurizing tower is improved, and the dust emission concentration at the outlet of the desulfurizing tower is reduced and meets the latest emission standard of the nation. The arranged wet electric precipitator can solve a problem of gypsum rain, and various pollutants are removed in a hybrid way; and in addition, a water collector is arranged between the demister and the wet electric precipitator, collects wash water of the wet electric precipitator for circulation and ensures that the wash water of the wet electric precipitator does not directly enter a neutralizing oxidation pond of the desulfurizing tower, and the water balance of the whole system is ensured.
Description
Technical field
The utility model relates to a kind of flue-gas dust-removing and desulfurization technology of wet desulfurization system, is specifically related to a kind of high-efficient wet-type electric precipitation desulphurization system.
Background technology
The dust emission limit value of up-to-date fossil-fuel power plant atmospheric pollutant emission standard (GB 13223-2011) is from original 50mg/m
3Change to 30mg/m
3, require the whole nation in 2012 to carry out less than 30mg/m
3Control criterion, the Changjiang river and the Delta of the Pearl River and Beijing-tianjin-hebei Region will be controlled at 20mg/m
3Below, and the control index of increase mercury and PM2.5 subparticle.
The dedusting technology of desulfurizer mainly contains at present: dry electric precipitation device, wet electrical dust precipitator and sack cleaner etc.
Wet electrical dust precipitator: wet electrical dust precipitator can be removed and be of a size of 0.01 micron so little particle, drop and mist, and efficient can reach more than 99.9%.But, the shortcoming of wet electrical dust precipitator is: consider the pole plate current evenly, higher, the nozzle wear of resistance, obstruction, equipment corrosion, fouling, in addition, input cost is higher and sewage disposal is difficult, flue gas condition for high dust concentration or high NOx concentration should not adopt, current, domestic power industry not yet has practical application.
The dry electric precipitation device: the dry electric precipitation device is used at most in power plant, also is the deduster that early begins to use.But, the shortcoming of dry electric precipitation device is: responsive especially to dust specific resistance, the most suitable is 106-1011 Ω cm than resistance, when than too high in resistance or cross and can cause that all efficiency of dust collection significantly descends when low, when particularly this atomic thin again light powder of high silicon high alumina exists in a large number, such as SiO
2Add Al
2O
3Content when surpassing 85%, because it is again that insulator is higher especially than resistance, and be again fine dust Al
2O
3Toughness easily glues electrode again, so efficiency of dust collection reduces more obvious.Implementing new standard (30mg/m
3) after, all be difficult to the discharge standard that reaches up-to-date even if the dry electric precipitation device arranges 5,6 electric fields, and increase electric field and can increase follow-up desulphurization cost.
Sack cleaner: on the sack cleaner Zai Full toe ring guaranteed request, all in all have superiority, particularly can collect fine dust and heavy metal, meet from now on environmental protection development emission request, but sack cleaner is had relatively high expectations to filter bag, at present, and the wearing and tearing of sack cleaner ubiquity, seriously corroded, the outstanding problem such as the life-span is short, maintenance cost is high, so far at home application achievement is less, and the problem that occurs is a lot.
In sum, the dedusting of present desulfurizer and droplet removal effect are relatively poor, can't satisfy the environment protection emission requirement.Under the up-to-date discharge standard of national requirements, be necessary very much to develop the high-effective dust-removing desulfur technology, improve the dust pelletizing system efficient of desulfurizer, reduce desulfurizer outlet dust emission concentration, to satisfy the requirement of environmental protection, to the mankind better living space is arranged.
Summary of the invention
In view of this, the utility model provides a kind of high-efficient wet-type electric precipitation desulphurization system, when guaranteeing desulfuration efficiency, can improve the dust pelletizing system efficient of desulfurizing tower, reduces desulfurizing tower outlet dust emission concentration, reaches the up-to-date discharge standard of national requirements.
High-efficient wet-type electric precipitation desulphurization system of the present utility model, comprise desulfurizing tower, described desulfurizing tower bottom is provided with smoke inlet, top is provided with exhanst gas outlet, described desulfurizing tower inner bottom part be in and oxidation pond, set gradually from bottom to up desulfurization uptake zone, demister and wet electrical dust precipitator between the inner smoke inlet of described desulfurizing tower and the exhanst gas outlet, described in and oxidation pond be communicated with the desulfurization uptake zone by circulating pump.
Further, also comprise cyclic water tank, flush water pump and be arranged on water accumulating disc between the inner demister of desulfurizing tower and the wet electrical dust precipitator, be distributed with projection on the card of described water accumulating disc, convex top has smoke ventilator, described water accumulating disc is communicated with cyclic water tank by the pipe-line system of catchmenting, and described cyclic water tank is by the flushing water system connectivity of flush water pump and wet electrical dust precipitator.
Further, described cyclic water tank is comprised of clarification water tank and flush box, described clarification water tank is communicated with flush box by overfall, described water accumulating disc is communicated with the clarification water tank by the pipe-line system of catchmenting, described flush box is by the flushing water system connectivity of flush water pump and wet electrical dust precipitator, described clarification water tank bottom by waste water pump with in and oxidation pond be communicated with.
The beneficial effects of the utility model are:
1) the utility model has been set up wet electrical dust precipitator above the demister in desulfurizing tower, at first utilize demister that the droplet in the clean flue gas and dust are removed in advance, the recycling wet electrical dust precipitator carries out precision processing, thereby reach very high environment protection emission requirement, usually can reach in the clean flue gas dust content at 30mg/m
3Below, therefore, the utility model has improved the dust pelletizing system efficient of desulfurizing tower when guaranteeing desulfuration efficiency, has reduced desulfurizing tower outlet dust emission concentration, has reached the up-to-date discharge standard of national requirements;
2) set up wet electrical dust precipitator after, can solve the problem that gypsum rain brings; Because conventional desulphurization system can't be tackled the droplet below the diameter 15 μ m, so gypsum rain is seriously polluted, sets up wet electrical dust precipitator and can remove ultra-fine grain, therefore can solve the gypsum rain problem;
3) wet electrical dust precipitator has very strong trapping ability to tiny dust granules, droplet, aerosol, metallic particles etc., can realize that mercury, heavy metal and PM2.5 ultra-fine grain etc. remove uniting of multiple pollutant, and reduces the chimney corrosion condition;
4) wet electrical dust precipitator of setting up is positioned at desulfurizing tower, and the desulfurizing tower integral arrangement, forms apparatus integration, saves floor space;
5) the utility model is set up water accumulating disc between demister and wet electrical dust precipitator, recycle behind the flushing water of water accumulating disc collection wet electrical dust precipitator, guarantee the wet electrical dust precipitator flushing water directly do not enter desulfurizing tower in and in the oxidation pond, guaranteed the water balance of whole system.
Description of drawings
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail, wherein:
Fig. 1 is structural representation of the present utility model.
The specific embodiment
Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.
Fig. 1 is structural representation of the present utility model, as shown in the figure, high-efficient wet-type electric precipitation desulphurization system of the present utility model, comprise desulfurizing tower 1, described desulfurizing tower 1 bottom is provided with smoke inlet 2, and top is provided with exhanst gas outlet 3, described desulfurizing tower 1 inner bottom part be in and oxidation pond 4, set gradually from bottom to up desulfurization uptake zone 5, demister 6 and wet electrical dust precipitator 7 between described desulfurizing tower 1 inner smoke inlet 2 and the exhanst gas outlet 3, described in and oxidation pond 4 be communicated with desulfurization uptake zone 5 by circulating pump 8.
In the present embodiment, also comprise cyclic water tank, flush water pump 9 and be arranged on water accumulating disc 10 between desulfurizing tower 1 inner demister 6 and the wet electrical dust precipitator 7, be distributed with projection on the card of described water accumulating disc 10, convex top has smoke ventilator, described water accumulating disc 10 is communicated with cyclic water tank by the pipe-line system 11 of catchmenting, and described cyclic water tank is communicated with the flushing water system 12 of wet electrical dust precipitator 7 by flush water pump 9; Flue gas can pass through from the smoke ventilator on the water accumulating disc 10, the flushing water of wet electrical dust precipitator 7 enters circulation by the pipe-line system 11 of catchmenting after then being collected by water accumulating disc 10, guaranteed wet electrical dust precipitator 7 flushing waters directly do not enter desulfurizing tower 1 in and in the oxidation pond 4, guaranteed the wet electrical dust precipitator of high water consumption and than the water balance between the desulphurization system of low water consumption.
In the present embodiment, described cyclic water tank is comprised of clarification water tank 13 and flush box 14, described clarification water tank 13 is communicated with flush box 14 by overfall, described water accumulating disc 10 is communicated with clarification water tank 13 by the pipe-line system 11 of catchmenting, described flush box 14 is communicated with the flushing water system 12 of wet electrical dust precipitator 7 by flush water pump 9, described clarification water tank 13 bottoms pass through waste water pump 15 with in be communicated with oxidation pond 4; In order to guarantee wet electrical dust precipitator 7 circulating flushing wash water water quality, cyclic water tank is divided into clarification water tank 13 and flush box 14, be conducive to isolate on the one hand the dust-laden waste water of high concentration, be convenient on the other hand regulating water quality and moisturizing.
Use the dust-removing and desulfurization process of high-efficient wet-type electric precipitation desulphurization system of the present utility model, former flue gas enters desulfurizing tower 1 from smoke inlet 2, then is desulfurized slurries absorbing and removing SO in desulfurization uptake zone 5
2, remove large droplet through demister 6 first through the clean flue gas of desulfurization uptake zone 5 after, enter again wet electrical dust precipitator 7 and remove drop and fine solid particle in the clean flue gas, last clean flue gas is discharged desulfurizing towers 1 from exhanst gas outlet 3; Desulfurization slurry in the desulfurization uptake zone 5 by circulating pump 8 from and circulate in the oxidation pond 4 and pump, desulfurization slurry can be made by the desulfurizing agent that calcium base, magnesium base etc. is slightly soluble in water, desulfurization slurry is 5 interior absorption SO in the desulfurization uptake zone
2After fall into and oxidation pond 4 in be oxidized to sulfate and crystallization, discharge through slurry pump 16 and process.
Dust-containing water after 12 pairs of wet electrical dust precipitators 7 of the flushing water system of wet electrical dust precipitator 7 wash after water accumulating disc 10 collections, enters clarification water tank 13 through the pipe-line system 11 of catchmenting; With oxidation pond 4 recyclings, clarification water tank 13 tops clean water overflow after precipitation entered flush box 14 during clarification water tank 13 bottoms dust-laden waste water was after precipitation squeezed into by waste water pump 15; Flush box 14 interior addings are used for modified alkali lye and the system consumption supplementing water of pH value, and the water in the flush box 14 recycles by the flushing water system 12 that flush water pump 9 is driven into wet electrical dust precipitator 7.
The utility model has the advantage of:
1) the utility model has been set up wet electrical dust precipitator 7 above desulfurizing tower 1 interior demister 6, at first utilize droplet and dust in 6 pairs of clean flue gases of demister to remove in advance, recycling wet electrical dust precipitator 7 carries out precision processing, thereby reach very high environment protection emission requirement, usually can reach in the clean flue gas dust content at 30mg/m
3Below, therefore, the utility model has improved the dust pelletizing system efficient of desulfurizing tower when guaranteeing desulfuration efficiency, has reduced desulfurizing tower outlet dust emission concentration, has reached the up-to-date discharge standard of national requirements;
2) set up wet electrical dust precipitator 7 after, can solve the problem that gypsum rain brings; Because conventional desulphurization system can't be tackled the droplet below the diameter 15 μ m, so gypsum rain is seriously polluted, sets up wet electrical dust precipitator 7 and can remove ultra-fine grain, therefore can solve the gypsum rain problem;
3) 7 pairs of tiny dust granules of wet electrical dust precipitator, droplet, aerosol, metallic particles etc. have very strong trapping ability, can realize that mercury, heavy metal and PM2.5 ultra-fine grain etc. remove uniting of multiple pollutant, and reduce the chimney corrosion condition;
4) wet electrical dust precipitator 7 of setting up is positioned at desulfurizing tower 1, and desulfurizing tower 1 integral arrangement, forms apparatus integration, saves floor space;
5) the utility model is set up water accumulating disc 10 between demister 6 and wet electrical dust precipitator 7, recycle behind the flushing water of water accumulating disc 10 collection wet electrical dust precipitators 7, guarantee wet electrical dust precipitator 7 flushing waters directly do not enter desulfurizing tower 1 in and in the oxidation pond 4, guaranteed the water balance of whole system.
Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although by the utility model being described with reference to preferred embodiment of the present utility model, but those of ordinary skill in the art is to be understood that, can make various changes to it in the form and details, and not depart from the spirit and scope of the present utility model that appended claims limits.
Claims (3)
1. high-efficient wet-type electric precipitation desulphurization system, comprise desulfurizing tower, described desulfurizing tower bottom is provided with smoke inlet, top is provided with exhanst gas outlet, described desulfurizing tower inner bottom part be in and oxidation pond, it is characterized in that: set gradually from bottom to up desulfurization uptake zone, demister and wet electrical dust precipitator between the inner smoke inlet of described desulfurizing tower and the exhanst gas outlet, described in and oxidation pond be communicated with the desulfurization uptake zone by circulating pump.
2. high-efficient wet-type electric precipitation desulphurization system according to claim 1, it is characterized in that: also comprise cyclic water tank, flush water pump and be arranged on water accumulating disc between the inner demister of desulfurizing tower and the wet electrical dust precipitator, be distributed with projection on the card of described water accumulating disc, convex top has smoke ventilator, described water accumulating disc is communicated with cyclic water tank by the pipe-line system of catchmenting, and described cyclic water tank is by the flushing water system connectivity of flush water pump and wet electrical dust precipitator.
3. high-efficient wet-type electric precipitation desulphurization system according to claim 2, it is characterized in that: described cyclic water tank is comprised of clarification water tank and flush box, described clarification water tank is communicated with flush box by overfall, described water accumulating disc is communicated with the clarification water tank by the pipe-line system of catchmenting, described flush box is by the flushing water system connectivity of flush water pump and wet electrical dust precipitator, described clarification water tank bottom by waste water pump with in and oxidation pond be communicated with.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220353952 CN202683013U (en) | 2012-07-20 | 2012-07-20 | High-efficiency wet electric precipitation and desulfurization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220353952 CN202683013U (en) | 2012-07-20 | 2012-07-20 | High-efficiency wet electric precipitation and desulfurization system |
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| CN202683013U true CN202683013U (en) | 2013-01-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102716639A (en) * | 2012-07-20 | 2012-10-10 | 中电投远达环保工程有限公司 | High-efficiency wet-type electric dust removal and desulfuration system and process |
| CN102764584A (en) * | 2012-08-14 | 2012-11-07 | 中电投远达环保工程有限公司 | Efficient wet type electrostatic-precipitation desulfurization system and process thereof |
| CN104984633A (en) * | 2015-07-14 | 2015-10-21 | 北京国电龙源环保工程有限公司 | Desulphurization and dust removal integrating flue gas purification device and method |
| CN107694227A (en) * | 2017-11-23 | 2018-02-16 | 南京中研专利技术开发有限公司 | A kind of waste gas treatment equipment with dust-removal and desulfurizing function applied to coal-burning power plant |
-
2012
- 2012-07-20 CN CN 201220353952 patent/CN202683013U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102716639A (en) * | 2012-07-20 | 2012-10-10 | 中电投远达环保工程有限公司 | High-efficiency wet-type electric dust removal and desulfuration system and process |
| CN102716639B (en) * | 2012-07-20 | 2014-08-20 | 中电投远达环保工程有限公司 | High-efficiency wet-type electric dust removal and desulfuration system and process |
| CN102764584A (en) * | 2012-08-14 | 2012-11-07 | 中电投远达环保工程有限公司 | Efficient wet type electrostatic-precipitation desulfurization system and process thereof |
| CN102764584B (en) * | 2012-08-14 | 2015-04-22 | 中电投远达环保工程有限公司 | Efficient wet type electrostatic-precipitation desulfurization process |
| CN104984633A (en) * | 2015-07-14 | 2015-10-21 | 北京国电龙源环保工程有限公司 | Desulphurization and dust removal integrating flue gas purification device and method |
| CN107694227A (en) * | 2017-11-23 | 2018-02-16 | 南京中研专利技术开发有限公司 | A kind of waste gas treatment equipment with dust-removal and desulfurizing function applied to coal-burning power plant |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20130123 |
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