CN202356019U - Dry-type flue gas desulfurization, denitration and demercuration integrated device - Google Patents
Dry-type flue gas desulfurization, denitration and demercuration integrated device Download PDFInfo
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- CN202356019U CN202356019U CN2011204454946U CN201120445494U CN202356019U CN 202356019 U CN202356019 U CN 202356019U CN 2011204454946 U CN2011204454946 U CN 2011204454946U CN 201120445494 U CN201120445494 U CN 201120445494U CN 202356019 U CN202356019 U CN 202356019U
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- humidifier
- digestion
- flue gas
- denitration
- type flue
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Abstract
The utility model discloses a dry-type flue gas desulfurization, denitration and demercuration integrated device. The device comprises a reaction tower, a dirt catcher, a draught fan and a chimney which are successively connected and also comprises a digestion humidifier and a solution box, wherein the output end of the solution box is connected with the input end of the digestion humidifier; the output end of circulation dust in the dirt catcher is connected with the input end of the digestion humidifier; and the output end of the digestion humidifier is connected with the lower part of the reaction tower. The device disclosed by the utility model has the advantages that the circulation dust does not need to be additionally added, desulfurization, denitration and demercuration devices are integrated, the device can be used for oxidizing elemental mercury (Hg<0>) so as to form stable oxidized mercury (Hg<2+>).
Description
Technical field
The utility model relates to a kind of dry type flue gas desulfurizing denitration demercuration integrated apparatus.
Background technology
The contained SO of coal-fired flue-gas
2And NO
XDischarging be the main cause that forms acid rain, existent environment of people and health are caused great harm.China is to the SO in the flue gas at present
2And NO
XRemove and all carry out separately usually, adopt flue gas desulfurization (FGD), denitrating flue gas (SCR/SNCR) and demercuration respectively, separately from needing a cover system or technological process to handle.Not only technological process is complicated, and equipment is many, and floor space is big, and operating cost is high.
Dry type flue gas desulfurizing denitrification integral method mainly contains high energy electron oxidizing process (comprising electronic beam method, impulse electric corona plasma technology, streamer-discahrge plasma technology, catalytic oxidation method etc.) at present, solid phase adsorption/method of reproduction (comprises activated coke absorption method, NO
XSO method, NH
3/ V
2O
X-TiO
2Method, CuO absorption method, Pahlman flue gas desulfurization and denitration technique etc.), liquid-film method etc.Shortcomings such as high energy electron oxidizing process ubiquity energy consumption height, solid phase adsorption/method of reproduction reaction temperature is high, and the adsorbent production cost is expensive; There are problems such as service life is long in liquid-film method.
A kind of flue gas desulfuration and denitrification purification method and device are disclosed in the patent No. is the utility model patent of ZL200310103954.7.It is in circulating fluid bed reactor, to spray into a kind of highly active absorbent, absorbs sulfur dioxide in flue gas SO
2With nitrogen oxide NO
XUtilize feed back on the dust arrester will be not the highly active absorbent of complete reaction send back in the charge pipe and recycle.This highly active absorbent is flyash, calcium hydroxide and the additive of certain proportioning, and middle additive is potassium permanganate KMnO
4, calcium hypochlorite Ca (ClO)
2, ammonium persulfate (NH
4)
2S
2O
8With Peracetic acid CH
3Among the COOOH one or more, and this highly active absorbent forms through special processing and fabricating.
Desulfurization, denitration have the technology of a cover system separately of one's own, though can reach effective removal to pollutant, because of system independent separately; The huge area occupied of desulphurization denitration equipment volume is big, and the technological process of system is complicated, and the control of whole system is required than higher; Two covering device separate configurations increase investment, increase SR; Increase power consumption, increase operating cost.
A kind of flue gas desulfuration and denitrification purification method prepares the back with absorbent and adds desulphurization denitration equipment owing to will in absorbent, add a large amount of flyash in the workshop, have following problem:
(1) in the absorbent because the flyash amount is bigger, account for 30%-60%, cause the absorbent use amount bigger, and absorbent needs the complicated preparation facilities of a cover, in industrial applications, need to solve preparation, storage, the transportation of absorbent.
(2) added a large amount of flyash in the absorbent, the grey conveying capacity that causes dedusting in the desulphurization denitration equipment to increase added burden, grey induction system increases.
(3) absorbent is not instant system, and additive is unstable material in the absorbent, under higher temperature and long period storage condition, is prone to lose efficacy, and has potential safety hazard.
(4) original semidry process desulfurizer being increased the denitration function need transform former lime storage, conveying, metering device.
The utility model content
The purpose of the utility model is to provide a kind of dry type flue gas desulfurizing denitration demercuration integrated apparatus, can effectively solve prior art to can not effectively removing the mercury in the gas, needs to add a large amount of flyash, increases the problem of added burden.
In order to solve the problems of the technologies described above; The utility model is realized through following technical scheme: a kind of dry type flue gas desulfurizing denitration demercuration integrated apparatus; Comprise the reaction tower, deduster, air-introduced machine, the chimney that connect successively, also comprise digestion humidifier, liquor box, the output of said liquor box links to each other with the input of digestion humidifier; The circulating ash output also links to each other with the input of digestion humidifier in the said deduster, and the output of said digestion humidifier links to each other with the bottom of reaction tower.
Preferably, also be provided with pump between said liquor box and the digestion humidifier.
Compared with prior art, the utility model has the advantages that: do not need extra interpolation circulating ash, desulfurization, denitration, demercuration equipment are integrated again; Technology controlling and process is simple, and floor space is little, and one-time investment is little; Reduce the running resistance of system; Reduce operating energy consumption, practice thrift operating cost, device is to element state mercury (Hg
0) done oxidation and formed comparatively stable oxidation state mercury (Hg
2+), and common desulfation dust-extraction device only makes element state mercury (Hg
0) absorption, unstable in atmospheric environment.
Description of drawings
Fig. 1 is the structural representation of a kind of dry type flue gas desulfurizing denitration demercuration of the utility model integrated apparatus.
The specific embodiment
Consult a kind of dry type flue gas desulfurizing denitration demercuration of Fig. 1 integrated apparatus; Comprise the reaction tower 1, deduster 2, air-introduced machine 3, the chimney 4 that connect successively; Also comprise digestion humidifier 5, liquor box 6, the output of said liquor box 6 links to each other with the input of digestion humidifier 5, and the circulating ash output also links to each other with the input of digestion humidifier 5 in the said deduster 2; The output of said digestion humidifier 5 links to each other with the bottom of reaction tower 1, also is provided with pump 7 between said liquor box 6 and the digestion humidifier 5.
A kind of dry type flue gas desulfurizing denitration demercuration method; In digestion humidifier 5, add absorbent; Through pump 7 the oxidisability additive solution in the liquor box 6 is added digestion humidifier 5; Circulating ash in the deduster 2 is also joined in the digestion humidifier 5, and formation contains wet combination ash, and said absorbent is CaO or Ca (OH)
2Powder; Said oxidation additive be potassium permanganate or potassium permanganate with calcium hypochlorite, potassium bichromate, clorox, sodium chlorite in one or more mix; Said oxidation additive joins in the liquor box 6; The addition of said oxidation additive is 0.8%～4% of an absorbent quality, and the water capacity that contains wet combination ash is 3%～5%, from the SO that contains of major project discharge
X, NO
XAnd the flue gas that mercury is gets into reaction tower 1, and circulating ash is sprayed in the reaction tower 1, and the temperature of flue gas is reduced to 70 ℃～120 ℃, and the humidity of flue gas reaches 8%～15%, makes SO
X, NO
XWith the substance reaction in the combination ash; Most of particle mercury and mercury oxide are recycled ash absorption simultaneously; Flue gas through desulfurization denitration demercuration gets into deduster 2, and the flue gas in the deduster 2 is sent into chimney 4 by air-introduced machine 3, and deduster 2 collected circulating ash get in the digestion humidifier 5 again.
Flue gas gets into reaction tower 1, in reaction tower 1, carries out desulfurization, denitration, demercuration reaction, and it is following to react main equation:
Ca(OH)
2+SO
2→CaSO
3.1/2H
2O+1/2H
2O
CaSO
3.1/2H
2O+1/2O
2→CaSO
4.1/2H
2O
3NO
2+H
2O→2HNO
3+NO
NO
2+NO+H
2O→2HNO
2
Ca(OH)
2+2HNO
2→Ca(NO
2)
2+2H
2O
Ca(OH)
2+2HNO
3→Ca(NO
3)
2+2H
2O
The above is merely the specific embodiment of the utility model; But the technical characterictic of the utility model is not limited thereto; Any those skilled in the art is in the field of the utility model, and variation of being done or modification all are encompassed among the claim of the utility model.
Claims (2)
1. dry type flue gas desulfurizing denitration demercuration integrated apparatus; Comprise the reaction tower (1), deduster (2), air-introduced machine (3), the chimney (4) that connect successively; It is characterized in that: also comprise digestion humidifier (5), liquor box (6); The output of said liquor box (6) links to each other with the input of digestion humidifier (5), and the circulating ash output also links to each other with the input of digestion humidifier (5) in the said deduster (2), and the output of said digestion humidifier (5) links to each other with the bottom of reaction tower (1).
2. a kind of dry type flue gas desulfurizing denitration demercuration integrated apparatus as claimed in claim 1 is characterized in that: also be provided with pump (7) between said liquor box (6) and the digestion humidifier (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204454946U CN202356019U (en) | 2011-11-11 | 2011-11-11 | Dry-type flue gas desulfurization, denitration and demercuration integrated device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204454946U CN202356019U (en) | 2011-11-11 | 2011-11-11 | Dry-type flue gas desulfurization, denitration and demercuration integrated device |
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| Publication Number | Publication Date |
|---|---|
| CN202356019U true CN202356019U (en) | 2012-08-01 |
Family
ID=46567239
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204454946U Expired - Lifetime CN202356019U (en) | 2011-11-11 | 2011-11-11 | Dry-type flue gas desulfurization, denitration and demercuration integrated device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202356019U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500226A (en) * | 2011-11-11 | 2012-06-20 | 浙江菲达脱硫工程有限公司 | Dry smoke desulfurization, denitration and mercury removal integration device and method thereof |
-
2011
- 2011-11-11 CN CN2011204454946U patent/CN202356019U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500226A (en) * | 2011-11-11 | 2012-06-20 | 浙江菲达脱硫工程有限公司 | Dry smoke desulfurization, denitration and mercury removal integration device and method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |
|
| CX01 | Expiry of patent term |