CN104984660A - Coal-fired flue gas pollutant treatment method - Google Patents
Coal-fired flue gas pollutant treatment method Download PDFInfo
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- CN104984660A CN104984660A CN201510352423.4A CN201510352423A CN104984660A CN 104984660 A CN104984660 A CN 104984660A CN 201510352423 A CN201510352423 A CN 201510352423A CN 104984660 A CN104984660 A CN 104984660A
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- coal
- catalyst
- flue gas
- fired flue
- gas
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Abstract
The invention discloses a coal-fired flue gas pollutant treatment method. Coal-fired flue gas and ammonia react with each other in a fixed bed reactor at the temperature of 0 DEG C to 300 DEG C to remove oxynitride in smoke, and V2O5/TiO2 catalyst is adopted in the fixed bed reactor. The method is characterized in that promoter with the weight being 0.7-1.1 times that of catalyst is added, and the promoter is composed of manganese dioxide and ferroferric oxide. Compared with existing V2O5/TiO2 catalytic selectivity denitration, the removal efficiency of oxynitride in the smoke can be improved remarkably, adaptability is good, and the removal rate of NOX can reach over 95%.
Description
Technical field
The present invention relates to a kind of administering method of coal-fired flue-gas pollutant.
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.Be that oxynitrides in reducing agent selective catalytic reduction flue gas is now widely used with ammonia, the catalyst used is mainly V
2o
5/ TiO
2, denitration rate generally can only reach 80-90%.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, provides a kind of method removing coal-fired flue-gas oxynitrides.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
An administering method for coal-fired flue-gas pollutant, reacts coal-fired flue-gas and ammonia to the oxynitrides removed in flue gas in fixed bed reactors at 200 ~ 300 DEG C, and fixed bed reactors adopt V
2o
5/ TiO
2catalyst, is characterized in that, doubly add by the 0.7-1.1 of catalyst weight and help agent, described co-catalyst is made up of manganese dioxide and tri-iron tetroxide.
The mass ratio of described manganese dioxide and tri-iron tetroxide is (1.5-2): 1.
With existing V
2o
5/ TiO
2catalytic selectivity denitration is compared, and adopt the inventive method can significantly improve the removal efficiency of oxynitrides in flue gas, adaptability is good, nitrogen (NO
x) 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
After coal-fired flue-gas wet dedusting, flue gas is mixed with ammonia and at 200 ~ 300 DEG C, reacts towards fixed bed the oxynitrides removed in flue gas.Catalyst in fixed bed reactors adopts commercially available V
2o
5/ TiO
2catalyst (V
2o
5: 2wt%), be 1:0.7 by catalyst and co-catalyst mass ratio, adding by mass ratio is that the manganese dioxide of 1.5:1 and tri-iron tetroxide form mixed cocatalyst.
embodiment 2
Differently from embodiment 1 be, the mass ratio of catalyst and co-catalyst is 1:1.1, and co-catalyst is that the manganese dioxide of 2:1 and tri-iron tetroxide form by mass ratio.
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. an administering method for coal-fired flue-gas pollutant, reacts coal-fired flue-gas and ammonia to the oxynitrides removed in flue gas in fixed bed reactors at 200 ~ 300 DEG C, and fixed bed reactors adopt V
2o
5/ TiO
2catalyst, is characterized in that, doubly add by the 0.7-1.1 of catalyst weight and help agent, described co-catalyst is made up of manganese dioxide and tri-iron tetroxide.
2. method according to claim 1, is characterized in that, the mass ratio of manganese dioxide and tri-iron tetroxide is (1.5-2): 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352423.4A CN104984660A (en) | 2015-06-24 | 2015-06-24 | Coal-fired flue gas pollutant treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352423.4A CN104984660A (en) | 2015-06-24 | 2015-06-24 | Coal-fired flue gas pollutant treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104984660A true CN104984660A (en) | 2015-10-21 |
Family
ID=54296626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510352423.4A Pending CN104984660A (en) | 2015-06-24 | 2015-06-24 | Coal-fired flue gas pollutant treatment method |
Country Status (1)
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| CN (1) | CN104984660A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110548502A (en) * | 2019-08-12 | 2019-12-10 | 广东工业大学 | vanadium oxide modified manganese-based catalyst for low-temperature SCR denitration and preparation method and application thereof |
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|---|---|---|---|---|
| CN101507923A (en) * | 2009-03-24 | 2009-08-19 | 中国科学院过程工程研究所 | Preparation method of catalyst for sintering flue gas and desulfurizing and denitrifying |
| CN101773837A (en) * | 2010-02-04 | 2010-07-14 | 环境保护部华南环境科学研究所 | Supported SCR denitration catalyst of medium and low temperature flue gas and preparation method and application 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 |
| CN103240098A (en) * | 2012-02-09 | 2013-08-14 | 中国石油化工股份有限公司 | Catalyst component and method for removing sulfur oxides and nitric oxides from smoke |
-
2015
- 2015-06-24 CN CN201510352423.4A patent/CN104984660A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101507923A (en) * | 2009-03-24 | 2009-08-19 | 中国科学院过程工程研究所 | Preparation method of catalyst for sintering flue gas and desulfurizing and denitrifying |
| CN101773837A (en) * | 2010-02-04 | 2010-07-14 | 环境保护部华南环境科学研究所 | Supported SCR denitration catalyst of medium and low temperature flue gas and preparation method and application thereof |
| CN103240098A (en) * | 2012-02-09 | 2013-08-14 | 中国石油化工股份有限公司 | Catalyst component and method for removing sulfur oxides and nitric oxides from smoke |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110548502A (en) * | 2019-08-12 | 2019-12-10 | 广东工业大学 | vanadium oxide modified manganese-based catalyst for low-temperature SCR denitration and preparation method and application thereof |
| CN110548502B (en) * | 2019-08-12 | 2022-06-14 | 广东工业大学 | Vanadium oxide modified manganese-based catalyst for low-temperature SCR denitration and preparation method and application thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151021 |
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| RJ01 | Rejection of invention patent application after publication |