CN202666644U - Water-saving and low-energy-consumption flue gas dry-wet compound dedusting and desulfurizing system - Google Patents
Water-saving and low-energy-consumption flue gas dry-wet compound dedusting and desulfurizing system Download PDFInfo
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- CN202666644U CN202666644U CN 201220353910 CN201220353910U CN202666644U CN 202666644 U CN202666644 U CN 202666644U CN 201220353910 CN201220353910 CN 201220353910 CN 201220353910 U CN201220353910 U CN 201220353910U CN 202666644 U CN202666644 U CN 202666644U
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Abstract
The utility model discloses a water-saving and low-energy-consumption flue gas dry-wet compound dedusting and desulfurizing system, which comprises a desulfurizing tower, a dry type deduster, a residual heat recovering heat exchanger, a water-saving heat exchanger and a wet electric deduster, wherein the dry type deduster is arranged in front of the desulfurizing tower; the outlet of the dry type deduster is communicated with the flue gas inlet of the desulfurizing tower through a fan; the residual heat recovering heat exchanger is arranged in front of the dry type deduster; the water-saving heat exchanger is arranged between the fan and the desulfurizing tower; the wet electric deduster is arranged between the desulfurizing tower and a chimney; the residual heat recovering heat exchanger is communicated with the inlet of the dry type deduster; the inlet of the water-saving heat exchanger is communicated with the outlet of the fan; the outlet of the water-saving heat exchanger is communicated with the flue gas inlet of the desulfurizing tower; the inlet of the wet electric deduster is communicated with the flue gas outlet of the desulfurizing tower; and the outlet of the wet electric deduster is communicated with the chimney. Due to the adoption of the water-saving and low-energy-consumption flue gas dry-wet compound dedusting and desulfurizing system, the dust emission concentration at the outlet of a dedusting system is lowered while the desulfurizing efficiency is ensured; and moreover, residual heat in the flue gas is recycled, so that energy is saved, consumption is lowered, and the water consumption of the desulfurizing tower is lowered.
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 water saving low energy consumption flue gas and does wet composite dedusting 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.
Present dedusting technology mainly contains: 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, coal-burning power plant's active service dust pelletizing system ubiquity dust emission problem not up to standard, the dust emission concentration of some old-fashioned dedusters is at 50-300 mg/m
3Therefore, under the up-to-date discharge standard of national requirements, be necessary very much to develop the high-effective dust-removing technology, improve dust pelletizing system efficient, reduce dust pelletizing system 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 water saving low energy consumption flue gas to do wet composite dedusting desulphurization system, under the prerequisite that guarantees desulfuration efficiency, improve dust pelletizing system efficient, reduce dust pelletizing system outlet dust emission concentration, reach the up-to-date discharge standard of national requirements, simultaneously, the waste heat in the flue gas is carried out recycling.
Water saving low energy consumption flue gas of the present utility model is done wet composite dedusting desulphurization system, comprise desulfurizing tower and be arranged on desulfurizing tower dry collector before, the outlet of described dry collector is communicated with the smoke inlet of desulfurizing tower by blower fan, also comprise and be arranged on dry collector heat recovery heat exchanger before, be arranged on the water-saving heat exchanging device between blower fan and the desulfurizing tower and be arranged on desulfurizing tower and chimney between wet electrical dust precipitator, described heat recovery heat exchanger is communicated with the entrance of dry collector, the entrance of described water-saving heat exchanging device is communicated with fan outlet, the outlet of water-saving heat exchanging device is communicated with the smoke inlet of desulfurizing tower, the entrance of described wet electrical dust precipitator is communicated with the exhanst gas outlet of desulfurizing tower, and the outlet of wet electrical dust precipitator is communicated with chimney.
Further, described dry collector is dry electric precipitation device, sack cleaner or electric-bag complex dust collector.
Further, the dust-laden discard solution discharge port of described wet electrical dust precipitator is communicated with desulfurizing tower.
The beneficial effects of the utility model are: the utility model is set up a wet electrical dust precipitator behind desulfurizing tower, and before dry collector, set up a heat recovery heat exchanger, before desulfurizing tower, set up a water-saving heat exchanging device, wet electrical dust precipitator, heat recovery heat exchanger and water-saving heat exchanging device and existing dry collector and the supporting enforcement of desulfurizing tower, proposed the composite dedusting mode of dry dust removal and wet static dedusting, its advantage is:
1) dust removing effects is jointly to be finished by dry collector and wet electrical dust precipitator, mainly is to reach discharge standard by wet electrical dust precipitator, the efficiency of dust collection of dry collector is required and can suitably reduce, can satisfy the desulfurizing tower normal operation as requirement; Therefore, the utility model has improved dust pelletizing system efficient when guaranteeing desulfuration efficiency, has reduced dust pelletizing system outlet dust emission concentration, and dust emission concentration is lower than 30mg/m
3, 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) the dried wet composite dedusting sulfur removal technology of employing can reduce the dedusting requirement to dry collector, has reduced construction cost and the operating cost of dry collector;
5) the dust-laden waste liquid of the generation of wet electrical dust precipitator directly enters desulfurizing tower, and externally discharging does not need to establish in addition Waste Water Treatment;
6) the flue gas waste heat recovery recycling is jointly to be finished by heat recovery heat exchanger and water-saving heat exchanging device; Heat recovery heat exchanger also reduces the actual exhaust gas volumn that enters dry collector and reduces flue-gas temperature when recycling fume afterheat, has improved efficiency of dust collection and the SO of dry collector
3Removal efficiency, reduced the electrical power of blower fan, reached energy-saving and cost-reducing purpose; The water-saving heat exchanging device also reduces the flue-gas temperature that enters desulfurizing tower when recycling fume afterheat, reduce the water consumption of desulfurizing tower.
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 process chart 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 process chart of the present utility model, as shown in the figure, water saving low energy consumption flue gas of the present utility model is done wet composite dedusting desulphurization system, comprise desulfurizing tower 1 and be arranged on desulfurizing tower 1 dry collector 2 before, the outlet of described dry collector 2 is communicated with the smoke inlet of desulfurizing tower 1 by blower fan 3, also comprise and be arranged on dry collector 2 heat recovery heat exchanger 7 before, be arranged on the water-saving heat exchanging device 6 between blower fan 3 and the desulfurizing tower 1 and be arranged on desulfurizing tower 1 and chimney 4 between wet electrical dust precipitator 5, described heat recovery heat exchanger 7 is communicated with the entrance of dry collector 2, the entrance of described water-saving heat exchanging device 6 is communicated with blower fan 3 outlets, the outlet of water-saving heat exchanging device 6 is communicated with the smoke inlet of desulfurizing tower 1, the entrance of described wet electrical dust precipitator 5 is communicated with the exhanst gas outlet of desulfurizing tower 1, and the outlet of wet electrical dust precipitator 5 is communicated with chimney 4; Flue gas enters heat recovery heat exchanger 7 recovery waste heats, reduces the cigarette temperature, flue gas after the cooling is further lowered the temperature through entering water-saving heat exchanging device 6 after the dry dust removal, further the flue gas after the cooling enters desulfurizing tower 1 desulfurization, and the flue gas after the desulfurization discharges by chimney 4 through wet static dedusting again.
In the present embodiment, described dry collector 2 is the dry electric precipitation device; Certainly, also can be the dry collector of other type, such as sack cleaner or electric-bag complex dust collector.
In the present embodiment, the dust-laden discard solution discharge port of described wet electrical dust precipitator 5 is communicated with desulfurizing tower 1; The dust-laden waste liquid of the generation of wet electrical dust precipitator 5 directly enters desulfurizing tower 1, and externally discharging does not need to establish in addition Waste Water Treatment.
The utility model is set up a wet electrical dust precipitator 5 behind desulfurizing tower 1, and before dry collector 2, set up a heat recovery heat exchanger 7, before desulfurizing tower 1, set up a water-saving heat exchanging device 6, wet electrical dust precipitator 5, heat recovery heat exchanger 7 and water-saving heat exchanging device 6 and existing dry collector 2 and desulfurizing tower 1 supporting enforcement, proposed the composite dedusting mode of dry dust removal and wet static dedusting, its advantage is:
1) dust removing effects is jointly to be finished by dry collector 2 and wet electrical dust precipitator 5, mainly is to reach discharge standard by wet electrical dust precipitator 5, the efficiency of dust collection of dry collector 2 is required and can suitably reduce, can satisfy desulfurizing tower 1 normal operation as requirement; Therefore, the utility model has improved dust pelletizing system efficient when guaranteeing desulfuration efficiency, has reduced dust pelletizing system outlet dust emission concentration, and dust emission concentration is lower than 30mg/m
3, reached the up-to-date discharge standard of national requirements;
2) set up wet electrical dust precipitator 5 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 5 and can remove ultra-fine grain, therefore can solve the gypsum rain problem;
3) 5 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) the dried wet composite dedusting sulfur removal technology of employing can reduce the dedusting requirement to dry collector 2, has reduced construction cost and the operating cost of dry collector 2;
5) the dust-laden waste liquid of the generation of wet electrical dust precipitator 5 directly enters desulfurizing tower 1, and externally discharging does not need to establish in addition Waste Water Treatment;
6) the flue gas waste heat recovery recycling is jointly to be finished by heat recovery heat exchanger 7 and water-saving heat exchanging device 6; Heat recovery heat exchanger 7 also reduces the actual exhaust gas volumn that enters dry collector 2 and reduces flue-gas temperature when recycling fume afterheat, has improved efficiency of dust collection and the SO of dry collector 2
3Removal efficiency, reduced the electrical power of blower fan 3, reached energy-saving and cost-reducing purpose; Water-saving heat exchanging device 6 also reduces the flue-gas temperature that enters desulfurizing tower 1 when recycling fume afterheat, reduce the water consumption of desulfurizing tower 1.
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. a water saving low energy consumption flue gas is done wet composite dedusting desulphurization system, comprise desulfurizing tower (1) and be arranged on desulfurizing tower (1) dry collector (2) before, the outlet of described dry collector (2) is communicated with the smoke inlet of desulfurizing tower (1) by blower fan (3), it is characterized in that: also comprise being arranged on dry collector (2) heat recovery heat exchanger (7) before, be arranged on the water-saving heat exchanging device (6) between blower fan (3) and the desulfurizing tower (1) and be arranged on desulfurizing tower (1) and chimney (4) between wet electrical dust precipitator (5), described heat recovery heat exchanger (7) is communicated with the entrance of dry collector (2), the entrance of described water-saving heat exchanging device (6) is communicated with blower fan (3) outlet, the outlet of water-saving heat exchanging device (6) is communicated with the smoke inlet of desulfurizing tower (1), the entrance of described wet electrical dust precipitator (5) is communicated with the exhanst gas outlet of desulfurizing tower (1), and the outlet of wet electrical dust precipitator (5) is communicated with chimney (4).
2. water saving low energy consumption flue gas according to claim 1 is done wet composite dedusting desulphurization system, and it is characterized in that: described dry collector (2) is dry electric precipitation device, sack cleaner or electric-bag complex dust collector.
3. water saving low energy consumption flue gas according to claim 1 is done wet composite dedusting desulphurization system, and it is characterized in that: the dust-laden discard solution discharge port of described wet electrical dust precipitator (5) is communicated with desulfurizing tower (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220353910 CN202666644U (en) | 2012-07-20 | 2012-07-20 | Water-saving and low-energy-consumption flue gas dry-wet compound dedusting and desulfurizing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220353910 CN202666644U (en) | 2012-07-20 | 2012-07-20 | Water-saving and low-energy-consumption flue gas dry-wet compound dedusting and desulfurizing system |
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| CN202666644U true CN202666644U (en) | 2013-01-16 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791821A (en) * | 2015-05-06 | 2015-07-22 | 中国能源建设集团广东省电力设计研究院有限公司 | Combined arrangement structure of four outlets of dust remover and rear smoke and air systems of two rows of induced draft fans for power plant |
| CN104832935A (en) * | 2015-05-08 | 2015-08-12 | 中国能源建设集团广东省电力设计研究院有限公司 | Equipment arrangement structure provided with flue gas residual heat recovery device behind dust catcher and flue gas system |
| CN104896491A (en) * | 2015-06-10 | 2015-09-09 | 中国能源建设集团广东省电力设计研究院有限公司 | Four-outlet biserial rear smoke wind system combined layout structure with flue gas waste heat recovery device |
| CN105042608A (en) * | 2015-05-06 | 2015-11-11 | 中国能源建设集团广东省电力设计研究院有限公司 | Rear air-flue gas system combined arrangement structure with six dust remover outlets for power plant |
| CN105056722A (en) * | 2015-07-29 | 2015-11-18 | 华中科技大学 | Method for removing multiple flue gas pollutants of coal fired boiler integrally and system thereof |
| CN105444194A (en) * | 2015-12-10 | 2016-03-30 | 中国能源建设集团广东省电力设计研究院有限公司 | Rear flue gas system combined arrangement structure of two outlets of dust collector and double rows of induced draft fans |
| CN105688582A (en) * | 2016-04-07 | 2016-06-22 | 国电环境保护研究院 | Condensation wet type electric compound flue gas purification process |
-
2012
- 2012-07-20 CN CN 201220353910 patent/CN202666644U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791821A (en) * | 2015-05-06 | 2015-07-22 | 中国能源建设集团广东省电力设计研究院有限公司 | Combined arrangement structure of four outlets of dust remover and rear smoke and air systems of two rows of induced draft fans for power plant |
| CN105042608A (en) * | 2015-05-06 | 2015-11-11 | 中国能源建设集团广东省电力设计研究院有限公司 | Rear air-flue gas system combined arrangement structure with six dust remover outlets for power plant |
| CN104791821B (en) * | 2015-05-06 | 2018-01-26 | 中国能源建设集团广东省电力设计研究院有限公司 | The power plant outlet of deduster four and the rear air and gas system combination layout structure of biserial air-introduced machine |
| CN105042608B (en) * | 2015-05-06 | 2018-09-25 | 中国能源建设集团广东省电力设计研究院有限公司 | The rear air and gas system combination layout structure that power plant's deduster six exports |
| CN104832935A (en) * | 2015-05-08 | 2015-08-12 | 中国能源建设集团广东省电力设计研究院有限公司 | Equipment arrangement structure provided with flue gas residual heat recovery device behind dust catcher and flue gas system |
| CN104896491A (en) * | 2015-06-10 | 2015-09-09 | 中国能源建设集团广东省电力设计研究院有限公司 | Four-outlet biserial rear smoke wind system combined layout structure with flue gas waste heat recovery device |
| CN105056722A (en) * | 2015-07-29 | 2015-11-18 | 华中科技大学 | Method for removing multiple flue gas pollutants of coal fired boiler integrally and system thereof |
| CN105444194A (en) * | 2015-12-10 | 2016-03-30 | 中国能源建设集团广东省电力设计研究院有限公司 | Rear flue gas system combined arrangement structure of two outlets of dust collector and double rows of induced draft fans |
| CN105688582A (en) * | 2016-04-07 | 2016-06-22 | 国电环境保护研究院 | Condensation wet type electric compound flue gas purification process |
| CN105688582B (en) * | 2016-04-07 | 2020-06-30 | 国电环境保护研究院 | Condensation-wet-electricity composite flue gas purification process |
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