CN202683012U - Water-saving smoke dry-wet compound dust removal and desulfurization system - Google Patents

Water-saving smoke dry-wet compound dust removal and desulfurization system Download PDF

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Publication number
CN202683012U
CN202683012U CN 201220353936 CN201220353936U CN202683012U CN 202683012 U CN202683012 U CN 202683012U CN 201220353936 CN201220353936 CN 201220353936 CN 201220353936 U CN201220353936 U CN 201220353936U CN 202683012 U CN202683012 U CN 202683012U
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China
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desulfurizing tower
water
communicated
outlet
dust
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CN 201220353936
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Inventor
唐小健
谢兴旺
杜云贵
聂华
熊学云
刘宇
尹正明
李紫龙
喻江涛
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CPI Yuanda Environmental Protection Engineering Co Ltd
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CPI Yuanda Environmental Protection Engineering Co Ltd
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Abstract

The utility model discloses a water-saving smoke dry-wet compound dust removal and desulfurization system which comprises a desulfurizing tower and a dry type dust precipitator arranged in the front of the desulfurizing tower, wherein an outlet of the dry type dust precipitator is communicated with a smoke inlet of the desulfurizing tower through a fan. The water-saving smoke dry-wet compound dust removal and desulfurization system also comprises a water-saving heat exchanger arranged between the fan and the desulfurizing tower and a wet type electric dust precipitator arranged between the desulfurizing tower and a chimney, wherein an inlet of the water-saving heat exchanger is communicated with an outlet of the fan, an outlet of the water-saving heat exchanger is communicated with a smoke inlet of the desulfurizing tower, an inlet of the wet type dust precipitator is communicated with a smoke outlet of the desulfurizing tower, and an outlet of the wet type electric dust precipitator is communicated with the chimney. According to the utility model, the dust emission concentration of an outlet of the dust removal system is reduced and reaches the newest emission standard required by China while the desulfurizing efficiency is ensured. According to the utility model, the water-saving heat exchanger is further arranged in the front of the desulfurizing tower, so that smoke waste heat can be recycled, temperature of smoke entering the desulfurizing tower is lowered, and water consumption of the desulfurizing tower is reduced.

Description

The water saving flue gas is done wet composite dedusting desulphurization system
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 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 flue gas to do wet composite dedusting desulphurization system, when guaranteeing desulfuration efficiency, can improve dust pelletizing system efficient, reduces dust pelletizing system outlet dust emission concentration, reaches the up-to-date discharge standard of national requirements.
Water saving 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 the water-saving heat exchanging device that is arranged between blower fan and the desulfurizing tower and be arranged on desulfurizing tower and chimney between wet electrical dust precipitator, 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 desulfurizing tower, set up a water-saving heat exchanging device, wet electrical dust precipitator, 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 water-saving heat exchanging device is set before desulfurizing tower, the water-saving heat exchanging device 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 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 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, 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 is through entering 6 coolings of water-saving heat exchanging device after the dry dust removal, 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 desulfurizing tower 1, set up a water-saving heat exchanging device 6, wet electrical dust precipitator 5, 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) water-saving heat exchanging device 6 is set before desulfurizing tower 1, water-saving heat exchanging device 6 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 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 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), 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 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 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).
CN 201220353936 2012-07-20 2012-07-20 Water-saving smoke dry-wet compound dust removal and desulfurization system Expired - Lifetime CN202683012U (en)

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CN 201220353936 CN202683012U (en) 2012-07-20 2012-07-20 Water-saving smoke dry-wet compound dust removal and desulfurization system

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Application Number Priority Date Filing Date Title
CN 201220353936 CN202683012U (en) 2012-07-20 2012-07-20 Water-saving smoke dry-wet compound dust removal and desulfurization system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105381665A (en) * 2015-11-09 2016-03-09 红河绿地环保科技发展有限公司 High temperature classification filtration treating method for smelting dust
CN105413352A (en) * 2015-12-23 2016-03-23 韦建初 Treatment method of high-temperature classified filtration on smelting dust

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105381665A (en) * 2015-11-09 2016-03-09 红河绿地环保科技发展有限公司 High temperature classification filtration treating method for smelting dust
CN105413352A (en) * 2015-12-23 2016-03-23 韦建初 Treatment method of high-temperature classified filtration on smelting dust

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