CN1883768A - Wet method combined process for desulfurization and denitration for chlorine-containing strong oxidizer absorption liquid - Google Patents
Wet method combined process for desulfurization and denitration for chlorine-containing strong oxidizer absorption liquid Download PDFInfo
- Publication number
- CN1883768A CN1883768A CNA2006100517210A CN200610051721A CN1883768A CN 1883768 A CN1883768 A CN 1883768A CN A2006100517210 A CNA2006100517210 A CN A2006100517210A CN 200610051721 A CN200610051721 A CN 200610051721A CN 1883768 A CN1883768 A CN 1883768A
- Authority
- CN
- China
- Prior art keywords
- denitration
- desulfurization
- absorption liquid
- flue gas
- wet method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 46
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 40
- 230000023556 desulfurization Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000007788 liquid Substances 0.000 title claims abstract description 30
- 239000007800 oxidant agent Substances 0.000 title claims abstract description 17
- 239000000460 chlorine Substances 0.000 title claims abstract description 9
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 title claims abstract description 7
- 229910052801 chlorine Inorganic materials 0.000 title claims abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000003546 flue gas Substances 0.000 claims abstract description 41
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims abstract description 5
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 18
- 239000007844 bleaching agent Substances 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 13
- 230000001590 oxidative effect Effects 0.000 claims description 11
- QXIKMJLSPJFYOI-UHFFFAOYSA-L calcium;dichlorite Chemical compound [Ca+2].[O-]Cl=O.[O-]Cl=O QXIKMJLSPJFYOI-UHFFFAOYSA-L 0.000 claims description 4
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 claims description 4
- 229960002218 sodium chlorite Drugs 0.000 claims description 4
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000009472 formulation Methods 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 42
- 238000006243 chemical reaction Methods 0.000 description 16
- 239000003344 environmental pollutant Substances 0.000 description 14
- 231100000719 pollutant Toxicity 0.000 description 14
- 239000002250 absorbent Substances 0.000 description 13
- 230000002745 absorbent Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 13
- 230000005587 bubbling Effects 0.000 description 12
- 238000002360 preparation method Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 7
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 239000000284 extract Substances 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000003541 multi-stage reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a process for wet method simultaneous desulfurization and denitration by using chlorine-containing strong oxidizer absorption liquid, comprising: infusing flue gas to be processed into absorption reactor to fully contact with chlorine-containing strong oxidizer absorption liquid, absorbing NOx and SO2 in flue gas and discharging same. In the invention, the raw materials are easy to obtain, and the formulation of adsorption liquid is easy. For processed flue gas by the above process, removal efficiency of nitric oxides can be up to 60 to 95%, and the desulfurization efficiency can be up to more than 90%.
Description
Technical field
The present invention relates to the air pollution control technique field, specifically relate in a kind of gas cleaning with chloric strong oxidant solution or slurries wet method combined process for desulfurization and denitration as absorption liquid.
Background technology
China's atmosphere polluting problem is serious at present, and country has formulated the atmosphere pollutants emission standards of increasingly stringent, has also strengthened the management of pollution charge, for protection health, ecological environment, coal-fired flue-gas is carried out desulphurization denitration become instant task.
Separate treatment technology with flue gas desulfurization and denitration and compare, flue gas combined desulfurization and denitration technology floor space is little, and is simple to operate, and expense is saved.But absorption liquid recipe ingredient complexity needs multistep reaction or severe reaction conditions in the existing flue gas combined desulfurization and denitration technology, and the desulphurization denitration cost is also just very high.
And study more NaClO
2/ NaOH desulfurizing and denitrifying process is easy to generate secondary pollution, can generate toxic gas, and equipment is had very strong corrosivity, the complicated difficult secondary utilization of carrying out again of the product of reaction.
Though urea/additive wet process of FGD denitration technology can reach very high desulfuration efficiency, but denitration efficiency is undesirable, only in urea liquid, add chemical addition agent and could improve denitration efficiency, but discover that cheap additive is little to the raising of denitration efficiency, and have only the high additive of the price of adding just can reach better denitration efficiency, therefore increased the operating cost of urea method, and because the additive component complexity that adds can increase the intractability that removes waste water.
Summary of the invention
The invention provides a kind of wet method combined process for desulfurization and denitration for chlorine-containing strong oxidizer absorption liquid, the nitrogen oxide that solved existing wet method combined desulphurization denitration technical formula complexity, be awkward, is difficult to reach higher is removed the problem of efficient, also greatly reduces the cost of combined desulfurization and denitration simultaneously.
Wet method combined process for desulfurization and denitration for chlorine-containing strong oxidizer absorption liquid provided by the invention comprises pending flue gas is entered absorption reactor thermally, makes absorption liquid with the absorption liquid that contains chloric strong oxidant and fully contacts, the NOx in the flue gas, SO
2Be absorbed the after-purification discharging.
Described chloric strong oxidant is a kind of of sodium chlorite, clorox, calcium chlorite, calcium hypochlorite, bleaching powder or several mixture, is preferably bleaching powder especially.
The amount of chloric strong oxidant is 0.1～20% by weight percentage in the absorption liquid, is preferably 5～15%.
Above-mentioned absorption reactor thermally can be selected from various absorption towers such as bubble tower, packed tower, spray column, venturi or rotating stream tray scrubber.
The water-soluble generation of chloric strong oxidant ClO
-, ClO
2 -Etc. the strong oxidizing property ion, the NO oxidation can be generated NO
3 -, Cl
-Deng product, the water-soluble alkalescent that is of absorbent, the OH that hydrolysis produces
-With SO
2Reaction generates SO
3 2-And SO
4 2-Ion, thereby NOx and SO in the removal flue gas
2
Bleaching powder is a mixture, and active ingredient is Ca (ClO)
2, also contain Ca (OH)
2, CaCl
2, Ca (ClO
2)
2And Cl
2Deng impurity, because it is with low cost, and often selected.
The bleaching powder slurries fully contact with the flue gas that enters wherein in absorption reactor thermally (as bubble tower, packed tower, spray column, venturi or rotating stream tray scrubber etc.), with NOx, the SO in the flue gas as the absorption liquid of combined desulfurization and denitration
2Chemical reaction takes place, and the pollutant in the gas phase is converted into ionic state.NOx in the flue gas, SO
2After being absorbed, Purge gas is from the absorption reactor thermally top discharge.
The absorption liquid that contains bleaching powder is stored in the fresh absorption liquid storage tank, extracts the absorption liquid that flows out in fresh absorption liquid of part and the absorption reactor thermally and carries out the mixing circulation use, and handle after the absorption liquid discharging to the part circulation.
The invention provides the wet method combined process for desulfurization and denitration raw material and be easy to get, cost is not high, can reduce the combined desulfurization and denitration cost greatly, and technology is simple simultaneously, effect is obvious, and the nitrogen oxide that can reach 60-95% is removed efficient and 90% above desulfuration efficiency.
Description of drawings
Fig. 1 is the flow chart of technology of the present invention.
The specific embodiment
By wet method combined process for desulfurization and denitration shown in Figure 1, flue gas enters from the bottom of absorption reactor thermally, and rising fully contacts the NOx in the flue gas, SO with the absorption liquid that absorption reactor thermally top enters
2After being absorbed, Purge gas is from the absorption reactor thermally top discharge.The absorption liquid that contains bleaching powder is stored in the fresh absorption liquid storage tank, extracts the absorption liquid that flows out in fresh absorption liquid of part and the absorption reactor thermally and carries out the mixing circulation use, and handle after the absorption liquid discharging to the part circulation.
Embodiment 1
Preparation contains 0.1% bleaching powder slurries, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 60%～80% nitrogen oxide removal efficient and 90% above desulfuration efficiency.
Embodiment 2
Preparation contains 5% bleaching powder slurries, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 70%～85% nitrogen oxide removal efficient and 95% above desulfuration efficiency.
Embodiment 3
Preparation contains 15% bleaching powder slurries, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 80%～95% nitrogen oxide removal efficient and 98% above desulfuration efficiency.
Embodiment 4
Preparation contains 20% bleaching powder slurries, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 80%～95% nitrogen oxide removal efficient and 98% above desulfuration efficiency.
Embodiment 5
Preparation contains 1% calcium hypochlorite slurries, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 70%～80% nitrogen oxide removal efficient and 90% above desulfuration efficiency.
Embodiment 6
Preparation contains 10% calcium hypochlorite slurries, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 80%～90% nitrogen oxide removal efficient and 95% above desulfuration efficiency.
Embodiment 7
Preparation contains calcium chlorite's slurries of 1%, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 70%～80% nitrogen oxide removal efficient and 90% above desulfuration efficiency.
Embodiment 8
Preparation contains calcium chlorite's slurries of 10%, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 80%～95% nitrogen oxide removal efficient and 95% above desulfuration efficiency.
Embodiment 9
Preparation contains 5% liquor natrii hypochloritis, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 75%～85% nitrogen oxide removal efficient and 90% above desulfuration efficiency.
Embodiment 10
Preparation contains 5% bleaching powder and 1% clorox slurries, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 75%～85% nitrogen oxide removal efficient and 95% above desulfuration efficiency.
Embodiment 11
Preparation contains 5% sodium chlorite solution, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 85%～95% nitrogen oxide removal efficient and 95% above desulfuration efficiency.
Embodiment 12
Preparation contains 5% bleaching powder and 1% sodium chlorite slurries, as the high activity blend absorbent of combined desulfurization and denitration, fully contacts with the flue gas that enters wherein in bubbling reactor, with NOx, the SO in the flue gas
2Chemical reaction takes place, and removes pollutant.Result of the test shows can reach 85%～95% nitrogen oxide removal efficient and 95% above desulfuration efficiency.
Claims (5)
1, a kind of wet method combined process for desulfurization and denitration for chlorine-containing strong oxidizer absorption liquid comprises pending flue gas is fed absorption reactor thermally, fully contacts the NOx in the flue gas, SO with absorption liquid
2Be absorbed the after-purification discharging, it is characterized in that: described absorption liquid is the solution or the slurries of chloric strong oxidant.
2. wet method combined process for desulfurization and denitration as claimed in claim 1 is characterized in that: described chloric strong oxidant is a kind of of sodium chlorite, clorox, calcium chlorite, calcium hypochlorite, bleaching powder or several mixture.
3. wet method combined process for desulfurization and denitration as claimed in claim 2 is characterized in that: described chloric strong oxidant is a bleaching powder.
4, as claim 1 or 2 or 3 described wet method combined process for desulfurization and denitration, it is characterized in that: contain percetage by weight in the described absorption liquid and be 0.1～20% chloric strong oxidant.
5, wet method combined process for desulfurization and denitration as claimed in claim 4 is characterized in that: contain percetage by weight in the described absorption liquid and be 5～15% chloric strong oxidant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100517210A CN100366325C (en) | 2006-05-29 | 2006-05-29 | Wet method combined process for desulfurization and denitration for chlorine-containing strong oxidizer absorption liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100517210A CN100366325C (en) | 2006-05-29 | 2006-05-29 | Wet method combined process for desulfurization and denitration for chlorine-containing strong oxidizer absorption liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1883768A true CN1883768A (en) | 2006-12-27 |
| CN100366325C CN100366325C (en) | 2008-02-06 |
Family
ID=37582146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100517210A Expired - Fee Related CN100366325C (en) | 2006-05-29 | 2006-05-29 | Wet method combined process for desulfurization and denitration for chlorine-containing strong oxidizer absorption liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100366325C (en) |
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| CN100496672C (en) * | 2007-04-30 | 2009-06-10 | 武汉凯迪电力环保有限公司 | Wet flue gas desulfurizing and hydrargyrum-removing technology based on two-stage oxidation reaction and system thereof |
| CN101385942B (en) * | 2008-10-13 | 2011-04-13 | 浙江天蓝环保技术有限公司 | Liquid-phase oxidation-absorption two-stage wet method flue-gas denitration technique |
| CN101428195B (en) * | 2008-11-10 | 2011-10-19 | 浙江天蓝环保技术有限公司 | System for treating flue gas nitrogen oxide and recycling nitrite with sodium chloride |
| CN102989273A (en) * | 2012-12-25 | 2013-03-27 | 华北电力大学（保定） | Compound absorbent capable of simultaneous desulfurization and denitrification as well as preparation and use methods thereof |
| CN103725345A (en) * | 2013-12-18 | 2014-04-16 | 广西大学 | Efficient reburning denitration fuel of coal fired boiler of cane sugar factory, preparation method and use method |
| CN104607029A (en) * | 2015-01-23 | 2015-05-13 | 大连理工大学 | Synchronous flue gas desulfurization and denitrification process combining chemical absorption with anaerobic-aerobic conversion |
| CN104971602A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Sintering flue gas desulfurization and denitrification method based on limestone-gypsum process |
| CN104984656A (en) * | 2015-06-23 | 2015-10-21 | 哈尔滨工业大学 | Multistage internal circulation semi-dry method desulfurization, denitrification and demercuration integrated device |
| CN105664673A (en) * | 2016-04-07 | 2016-06-15 | 中石化炼化工程（集团）股份有限公司 | Coal chemical industry waste gas denitration and wastewater reuse coupling processing technique |
| CN105879642A (en) * | 2016-06-27 | 2016-08-24 | 沈阳汇川环境工程有限公司 | Coal-fired flue gas denitration and desulfurization method |
| CN106039992A (en) * | 2016-07-12 | 2016-10-26 | 湖南警察学院 | Wet-type flue gas neutralizing and desulfurizing method and device |
| CN106582247A (en) * | 2016-12-26 | 2017-04-26 | 合肥天翔环境工程有限公司 | Sulfur and metal removal method for metallurgical flue gas |
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| JP2923082B2 (en) * | 1991-06-10 | 1999-07-26 | 三菱重工業株式会社 | Flue gas desulfurization method |
| FR2724577B1 (en) * | 1994-09-21 | 1996-12-27 | Lab Sa | IMPROVEMENT IN WET FLUE PURIFICATION PROCESSES FOR GASEOUS POLLUTANTS |
| US6808692B2 (en) * | 2002-02-14 | 2004-10-26 | Oehr Klaus H | Enhanced mercury control in coal-fired power plants |
| US20040022707A1 (en) * | 2002-06-05 | 2004-02-05 | Exxonmobil Research And Engineering Company | Oxidation of NOx's with sodium chlorite in combination with a thermal NOx removal process |
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| CN100496672C (en) * | 2007-04-30 | 2009-06-10 | 武汉凯迪电力环保有限公司 | Wet flue gas desulfurizing and hydrargyrum-removing technology based on two-stage oxidation reaction and system thereof |
| CN101385942B (en) * | 2008-10-13 | 2011-04-13 | 浙江天蓝环保技术有限公司 | Liquid-phase oxidation-absorption two-stage wet method flue-gas denitration technique |
| CN101428195B (en) * | 2008-11-10 | 2011-10-19 | 浙江天蓝环保技术有限公司 | System for treating flue gas nitrogen oxide and recycling nitrite with sodium chloride |
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| CN106582247A (en) * | 2016-12-26 | 2017-04-26 | 合肥天翔环境工程有限公司 | Sulfur and metal removal method for metallurgical flue gas |
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| CN107638792A (en) * | 2017-09-26 | 2018-01-30 | 大连理工大学 | A kind of compound flue gas denitration oxidizing agent and application process |
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| CN113083340B (en) * | 2021-04-09 | 2023-11-14 | 河南汇金智能装备有限公司 | Catalyst for inhibiting calcium sulfate decomposition, high-efficiency catalytic desulfurization powder containing catalyst and application method |
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