CN103657400A - Integrated engineering system for purifying flue gas by LSCO (low-temperature selectivity catalytic oxygen) - Google Patents
Integrated engineering system for purifying flue gas by LSCO (low-temperature selectivity catalytic oxygen) Download PDFInfo
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- CN103657400A CN103657400A CN201210364328.2A CN201210364328A CN103657400A CN 103657400 A CN103657400 A CN 103657400A CN 201210364328 A CN201210364328 A CN 201210364328A CN 103657400 A CN103657400 A CN 103657400A
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- China
- Prior art keywords
- flue gas
- compressed air
- gas
- oxidation
- tower
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- 239000003546 flue gas Substances 0.000 title claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 230000003197 catalytic effect Effects 0.000 title claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title description 2
- 239000001301 oxygen Substances 0.000 title description 2
- 229910052760 oxygen Inorganic materials 0.000 title description 2
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 230000003647 oxidation Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 4
- 239000012670 alkaline solution Substances 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 239000003337 fertilizer Substances 0.000 abstract description 4
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 abstract description 3
- 230000002745 absorbent Effects 0.000 abstract description 3
- 239000002250 absorbent Substances 0.000 abstract description 3
- 239000007800 oxidant agent Substances 0.000 abstract description 3
- 238000010531 catalytic reduction reaction Methods 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 238000006722 reduction reaction Methods 0.000 abstract description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 abstract 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 abstract 2
- 235000011130 ammonium sulphate Nutrition 0.000 abstract 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000006227 byproduct Substances 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate group Chemical group S(=O)(=O)([O-])[O-] QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Images
Classifications
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- 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
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- Treating Waste Gases (AREA)
Abstract
The invention relates to a special gas humidifying, mixing and injecting system, a catalyst tower, special catalysts and an absorption tower for absorbing SO2, NOx and Hg particles in flue gas simultaneously. Effective ammonium sulfate and ammonium nitrate can be generated in a tower in which ammonia hydroxide is taken as an absorbent. Compared with the prior art, such as an SCR (Selective Catalytic Reduction) method, the system has the following beneficial effects: (1) the temperature greater than 200 DEG C is not required when the system operates within a conventional kiln flue gas temperature range (60-150 DEG C), so that the existing boiler structure is not required to be transformed, and only the flue channel part needs to be transformed; (2) byproducts are ammonium sulfate and ammonium nitrate fertilizers, and are not required to be converted into N2 by reduction, so that the system has considerable running benefit; (3) the system is long in service life, good in reliability, low in investment, and high in NOx removing efficiency; (4) an oxidant is generally compressed air, and expensive high-value oxidants such as hydrogen peroxide and ozone are not required.
Description
Technical field
The present invention relates to field of Environment Protection, be specifically related to the purification techniques system of flue gas
Background technology
At present, at Chinese denitration technology, be SCR and SNCR method, major defect is:
(1) need to, through row transformation on complete boiler, need to destroy original boiler;
(2) need under hot conditions, work, SCR method: 280～420 ℃, SNCR method: 930～1093 ℃, system and material are had higher requirements;
(3) in SCR catalyst, contain highly toxic V2O5 and easily cause secondary pollution, need to spend the micro-useless processing of large price;
(4) work under bad environment, easily failure, the life-span is short, and catalyst General Life is 16000h left and right only;
(5) operating cost is high: owing to adopting selective catalytic reduction method need to spend a large amount of ammonia as reducing agent, and the NO in reduction flue gas
xfor N
2discharge;
(6) need comparatively accurate control and purging system, investment is large.
Summary of the invention
The object of the invention is the defect for existing SCR method, in principle, from the SCR of SCR method and transfer selective catalytic oxidation path to, with cheap compressed air, be primary oxidant, thereby overcome the defect of SCR method:
(1) serviceability temperature is 60～150 ℃, does not need 280 ℃ of high-temperature flue gas conditions of >, thereby does not need to transform original boiler.
(2) accessory substance is sulfate, nitrate, with ammonia absorption, generates sulphur ammonium, and ammonium nitrate chemical fertilizer has better operation income;
(3) desulphurization denitration is used same set of absorption tower, can further reduce particle concentration and remove the Toxics such as Hg;
(4) catalyst good reliability, the life-span is long, does not need expensive control and purging system;
(5) one-time investment is little.
Can be widely used in boiler and Industrial Stoves as field gas cleanings such as (sintering furnace, cement kiln, glass furnaces).
Technical scheme of the present invention is:
The engineering of integrating system of this LSCO cryogenic selective catalytic oxidation purifying smoke is by gas mixer, SCO catalytic oxidation tower, integrated desulfurization, denitration absorption tower and corresponding supply system, as compressed air, after ammoniacal liquor and other absorbent storing supply system forms 1 dedusting of flue gas Self-duster and the mist being formed by compressed air 3 and promoter gas 4 of ejection in gas mixer 2 be mixed into static mixer 5 and further mix after in catalytic oxidation tower 6, the NO under catalyst 7 acts in flue gas is oxidized to NO
2with other NO
xwith flue gas, enter in bubbling absorption column 8 and the absorption liquid raw corresponding nitrate of 10 reaction and nitrite, the simultaneously SO in flue gas
2also be absorbed in the lump, simultaneously absorbed also have solid particulate matter and other material as Hg etc., and the flue gas after purification enters chimney 12 through demister 9 by air-introduced machine 11 and discharges.
Accompanying drawing 1, does not comprise the technical scheme of the chemical fertilizer production system after ammonia absorption.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention, wherein:
1---deduster, 2---gas mixer, 3---air compressor (station), 4---promoter vaporizer, 5---flue gas static mixer, 6---SCO catalytic oxidation tower, 7---catalyst, 8---integrated absorption tower, 9---demister, 10---absorption liquid, 11---air-introduced machine, 12---chimney, 13---valve, 14---flue gas.
The specific embodiment
The engineering of integrating system of this LSCO cryogenic selective catalytic oxidation purifying smoke is by gas mixer, SCO catalytic oxidation tower, integrated desulfurization, denitration absorption tower and corresponding supply system, as compressed air, after ammoniacal liquor and other absorbent storing supply system forms 1 dedusting of flue gas Self-duster and the mist being formed by compressed air 3 and promoter gas 4 of ejection in gas mixer 2 be mixed into static mixer 5 and further mix after in catalytic oxidation tower 6, the NO under catalyst 7 acts in flue gas is oxidized to NO
2with other NO
xwith flue gas, enter in bubbling absorption column 8 and the absorption liquid raw corresponding nitrate of 10 reaction and nitrite, the simultaneously SO in flue gas
2also be absorbed in the lump, simultaneously absorbed also have solid particulate matter and other material as Hg etc., and the flue gas after purification enters chimney 12 through demister 9 by air-introduced machine 11 and discharges.
Accompanying drawing 1, does not comprise the technical scheme of the chemical fertilizer production system after ammonia absorption.
Claims (2)
1. use process for selective catalytic oxidation to remove a water-fast NO in flue gas, the compressed air that makes it to pass into after humidification under catalyst condition is oxidized, and generates water-soluble NO
2with high oxynitride, comprising: compressed air and humidifying method, gas jet-mixing system, and with cyclone mode mixed flue gas, through mixing grid 5, enter the special catalytic reactor that oxidation catalyst 7 is housed 6, the NO oxidation by air in flue gas, and other materials are as SO
2oxidized hardly, it is characterized in that: the compressed air after humidification sprays in flue by a kind of spraying system after gas mixer and flue gas 14 mixes, and the NO in catalytic reactor and in flue gas plays selective catalytic oxidation reaction and generates water-soluble NO
xthereby, in absorption tower 8, be cleaned removal.
2. according to above-mentioned (1) described system, it is characterized by: use the compressed air after humidification, if desired (as low SO
2environment) can increase part ozone, at high concentration CO
2under condition, through special mixed flow and catalyst condition, the NO in oxidation kiln gas becomes the NO that can be absorbed by water, alkaline solution
2and NO
x.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210364328.2A CN103657400A (en) | 2012-09-24 | 2012-09-24 | Integrated engineering system for purifying flue gas by LSCO (low-temperature selectivity catalytic oxygen) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210364328.2A CN103657400A (en) | 2012-09-24 | 2012-09-24 | Integrated engineering system for purifying flue gas by LSCO (low-temperature selectivity catalytic oxygen) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103657400A true CN103657400A (en) | 2014-03-26 |
Family
ID=50296895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210364328.2A Pending CN103657400A (en) | 2012-09-24 | 2012-09-24 | Integrated engineering system for purifying flue gas by LSCO (low-temperature selectivity catalytic oxygen) |
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| Country | Link |
|---|---|
| CN (1) | CN103657400A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731565A (en) * | 2016-11-23 | 2017-05-31 | 无锡市国松环保机械有限公司 | Novel SCR low-temperature denitration device |
| CN111644032A (en) * | 2020-03-12 | 2020-09-11 | 上海守望者喷雾智能系统有限公司 | Low-temperature NO oxidation and removal process system |
| CN112933898A (en) * | 2021-02-09 | 2021-06-11 | 江苏盐环实业有限公司 | Flue gas desulfurization and denitrification system |
| WO2023116030A1 (en) * | 2021-12-22 | 2023-06-29 | 广东美的制冷设备有限公司 | Air purification assembly, control method, air purification apparatus, and storage medium |
-
2012
- 2012-09-24 CN CN201210364328.2A patent/CN103657400A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731565A (en) * | 2016-11-23 | 2017-05-31 | 无锡市国松环保机械有限公司 | Novel SCR low-temperature denitration device |
| CN111644032A (en) * | 2020-03-12 | 2020-09-11 | 上海守望者喷雾智能系统有限公司 | Low-temperature NO oxidation and removal process system |
| CN112933898A (en) * | 2021-02-09 | 2021-06-11 | 江苏盐环实业有限公司 | Flue gas desulfurization and denitrification system |
| WO2023116030A1 (en) * | 2021-12-22 | 2023-06-29 | 广东美的制冷设备有限公司 | Air purification assembly, control method, air purification apparatus, and storage medium |
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Addressee: Zhang Jiwei Document name: Notification of Passing Preliminary Examination of the Application for Invention |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Addressee: Zhang Jiwei Document name: Notification of Publication of the Application for Invention |
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Addressee: Zhang Jiwei Document name: Notification of before Expiration of Request of Examination as to Substance |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |