CN104984659A - Coal-fired flue gas denitrification method - Google Patents
Coal-fired flue gas denitrification method Download PDFInfo
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- CN104984659A CN104984659A CN201510352387.1A CN201510352387A CN104984659A CN 104984659 A CN104984659 A CN 104984659A CN 201510352387 A CN201510352387 A CN 201510352387A CN 104984659 A CN104984659 A CN 104984659A
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- coal
- gas
- flue gas
- fired flue
- flue
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Abstract
The invention discloses a coal-fired flue gas denitrification method. After dust is removed through a coal-fired flue gas wet method, smoke and ammonia gas are mixed to react with chromium trioxide and iron sesquioxide as a mixed catalyst at the temperature of 200 DEG C to 300 DEG C so as to remove oxynitride in the smoke. Compared with an existing denitrification technology, the denitrification efficiency is high, resources of catalysts for denitrification are rich, adaptability is good, and the removal rate of nitrogen can reach over 95%.
Description
Technical field
The present invention relates to a kind of coal-fired flue-gas denitrogenation method.
Background technology
Coal-fired flue-gas is the mixture of gas and flue dust, is the main cause polluting residential block air.The composition of flue gas is very complicated, and gas comprises SO
2, NO
2, NO, CO, CO
2deng pernicious gas, and ash content, coal grain, oil droplet and high-temperature split product etc.Therefore the pollution of flue gas to environment is the combined pollution of multiple poisonous substance.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, provides a kind of coal-fired flue-gas denitrogenation method.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A kind of coal-fired flue-gas denitrogenation method, after coal-fired flue-gas wet dedusting, mixes flue gas with ammonia, with chromium trioxide and di-iron trioxide for mixed catalyst, and the oxynitrides that reaction removes in flue gas at 200 ~ 300 DEG C.
Further, the mass ratio of described chromium trioxide and di-iron trioxide is 1:(8-10).
Compared with existing denitride technology, nitric efficiency of the present invention is high, and the aboundresources of its catalyst, adaptability is good, and nitrogen extrusion rate can reach more than 95%.
Detailed description of the invention
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
embodiment 1
A kind of coal-fired flue-gas denitrogenation method, after coal-fired flue-gas wet dedusting, mix flue gas with ammonia towards fixed bed, take mass ratio as the chromium trioxide of 1:8 and the mixture of di-iron trioxide is catalyst, the oxynitrides that reaction removes in flue gas at 200 DEG C.
embodiment 2
A kind of coal-fired flue-gas denitrogenation method, after coal-fired flue-gas wet dedusting, mix flue gas with ammonia towards fixed bed, take mass ratio as the chromium trioxide of 1:10 and the mixture of di-iron trioxide is catalyst, the oxynitrides that reaction removes in flue gas at 300 DEG C.
The reaction occurred has: NH
3+ NO+O
2→ N
2+ H
2o, NH
3+ NO
2+ O
2→ N
2+ H
2o, NH
3+ NO
2→ N
2+ H
2o
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a coal-fired flue-gas denitrogenation method, after coal-fired flue-gas wet dedusting, mixes flue gas with ammonia, with chromium trioxide and di-iron trioxide for mixed catalyst, reacts the oxynitrides removed in flue gas at 200 ~ 300 DEG C.
2. denitrogenation method according to claim 1, is characterized in that, the mass ratio of described chromium trioxide and di-iron trioxide is 1:(8-10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352387.1A CN104984659A (en) | 2015-06-24 | 2015-06-24 | Coal-fired flue gas denitrification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352387.1A CN104984659A (en) | 2015-06-24 | 2015-06-24 | Coal-fired flue gas denitrification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104984659A true CN104984659A (en) | 2015-10-21 |
Family
ID=54296625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510352387.1A Pending CN104984659A (en) | 2015-06-24 | 2015-06-24 | Coal-fired flue gas denitrification method |
Country Status (1)
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049777A (en) * | 1976-05-20 | 1977-09-20 | Didier Engineering Gmbh | Method of waste gas treatment |
| CN1546231A (en) * | 2003-12-09 | 2004-11-17 | 南化集团研究院 | Catalyst for removing nitrogen oxide through selective catalytic reduction and its preparation method |
| CN102000600A (en) * | 2010-11-17 | 2011-04-06 | 上海纳米技术及应用国家工程研究中心有限公司 | Integral normal-temperature micro nitrogen oxide purification material and preparation method thereof |
| CN102631921A (en) * | 2012-03-23 | 2012-08-15 | 华烁科技股份有限公司 | Nitric acid exhaust gas denitration catalyst and preparation method thereof |
| CN103028413A (en) * | 2012-12-13 | 2013-04-10 | 上海纳米技术及应用国家工程研究中心有限公司 | Chromium-doped catalyst for catalytic oxidation of nitric oxide at normal temperature and pressure, as well as preparation method and application thereof |
| CN104096569A (en) * | 2013-04-02 | 2014-10-15 | 四川清源环境工程有限公司 | Sulfur-resistant and water-proof low temperature catalyst in flue gas denitration and preparation method thereof |
-
2015
- 2015-06-24 CN CN201510352387.1A patent/CN104984659A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049777A (en) * | 1976-05-20 | 1977-09-20 | Didier Engineering Gmbh | Method of waste gas treatment |
| CN1546231A (en) * | 2003-12-09 | 2004-11-17 | 南化集团研究院 | Catalyst for removing nitrogen oxide through selective catalytic reduction and its preparation method |
| CN102000600A (en) * | 2010-11-17 | 2011-04-06 | 上海纳米技术及应用国家工程研究中心有限公司 | Integral normal-temperature micro nitrogen oxide purification material and preparation method thereof |
| CN102631921A (en) * | 2012-03-23 | 2012-08-15 | 华烁科技股份有限公司 | Nitric acid exhaust gas denitration catalyst and preparation method thereof |
| CN103028413A (en) * | 2012-12-13 | 2013-04-10 | 上海纳米技术及应用国家工程研究中心有限公司 | Chromium-doped catalyst for catalytic oxidation of nitric oxide at normal temperature and pressure, as well as preparation method and application thereof |
| CN104096569A (en) * | 2013-04-02 | 2014-10-15 | 四川清源环境工程有限公司 | Sulfur-resistant and water-proof low temperature catalyst in flue gas denitration and preparation method thereof |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151021 |