CN104971605A - Coal-fired flue gas treatment method - Google Patents
Coal-fired flue gas treatment method Download PDFInfo
- Publication number
- CN104971605A CN104971605A CN201510352188.0A CN201510352188A CN104971605A CN 104971605 A CN104971605 A CN 104971605A CN 201510352188 A CN201510352188 A CN 201510352188A CN 104971605 A CN104971605 A CN 104971605A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- coal
- fired flue
- titanium dioxide
- gas treatment
- 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.)
- Pending
Links
Landscapes
- Catalysts (AREA)
Abstract
The invention discloses a coal-fired flue gas treatment method. After water-process dust extraction of the coal-fired flue gas, the flue gas in guided into a desulfurization solution, so that sulfur dioxide is removed; the flue gas subjected to desulfurization is introduced into a fixed bed reactor to react with ammonia gas to remove nitride oxides; the desulfurization solution is a saturated magnesium hydroxide solution comprising 1-3g/L potassium permanganate and 0.01-0.02g/L titanium dioxide; and a catalyst used for the fixed bed reactor consists of chromium trioxide, iron trioxide and titanium dioxide. Compared with a current coal-fired flue gas treatment technology, the coal-fired flue gas treatment method disclosed by the invention is high in desulfurization and denitrification efficiency, rich in medicament resource, capable of recycling byproducts, high in commercial value, not high in requirements on fire coal, and good in adaptation; and the removal rate of sulfur dioxide can be higher than 99%, and the removal rate of nitrogen oxides can be higher than 95%.
Description
Technical field
The present invention relates to a kind of coal-fired flue gas treatment 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 treatment 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 treatment method, after coal-fired flue-gas wet dedusting, flue gas is imported scrubbing CO_2 in doctor solution, then flue gas after desulfurization is passed into fixed bed reactors and ammonia gas react removes oxynitrides, described doctor solution is the saturated magnesium hydroxide solution containing the potassium permanganate of 1 ~ 3g/L and the titanium dioxide of 0.01 ~ 0.02g/L, and described fixed bed reactors catalyst used is made up of chromium trioxide, di-iron trioxide and titanium dioxide.
Further, the mass ratio of described chromium trioxide, di-iron trioxide and titanium dioxide is 1:(8-10): (4-6).
Fixed bed reaction temperature is 200-300 DEG C.
Compared with existing coal-fired flue-gas treatment technology, desulfurization of the present invention and nitric efficiency high, and the aboundresources of its medicament, the recyclable recycling of byproduct, commercial value is high, less demanding to fire coal, and adaptability is good, the extrusion rate of sulfur dioxide can reach more than 99%, and the extrusion rate of oxynitrides 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 treatment method, after coal-fired flue-gas wet dedusting, flue gas is imported scrubbing CO_2 in doctor solution, then the flue gas after desulfurization is passed into fixed bed reactors and ammonia gas react removes oxynitrides, described doctor solution is the saturated magnesium hydroxide solution of the titanium dioxide of potassium permanganate containing 1g/L and 0.01g/L, described fixed bed reactors catalyst used by mass ratio be the chromium trioxide of 1:8:4, di-iron trioxide and titanium dioxide forms, reaction temperature is 200 DEG C.
Be added to the water by magnesia, saturated magnesium hydroxide solution is made in reaction, then adds potassium permanganate, after dissolving, adds titanium dioxide, obtains doctor solution.The titanium dioxide added catalysis can improve oxidizing sulfur dioxide speed, thus improves sulfur dioxide removal efficiency.
embodiment 2
Differently from embodiment 1 to be, containing the potassium permanganate of 3g/L and the titanium dioxide of 0.02g/L in doctor solution, the catalyst of fixed bed reactors by mass ratio be the chromium trioxide of 1:10:6, di-iron trioxide and titanium dioxide forms, reaction temperature is 300 DEG C.
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 treatment method, after coal-fired flue-gas wet dedusting, flue gas is imported scrubbing CO_2 in doctor solution, then flue gas after desulfurization is passed into fixed bed reactors and ammonia gas react removes oxynitrides, described doctor solution is the saturated magnesium hydroxide solution containing the potassium permanganate of 1 ~ 3g/L and the titanium dioxide of 0.01 ~ 0.02g/L, and described fixed bed reactors catalyst used is made up of chromium trioxide, di-iron trioxide and titanium dioxide.
2. processing method according to claim 1, is characterized in that, the mass ratio of described chromium trioxide, di-iron trioxide and titanium dioxide is 1:(8-10): (4-6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352188.0A CN104971605A (en) | 2015-06-24 | 2015-06-24 | Coal-fired flue gas treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352188.0A CN104971605A (en) | 2015-06-24 | 2015-06-24 | Coal-fired flue gas treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104971605A true CN104971605A (en) | 2015-10-14 |
Family
ID=54268903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510352188.0A Pending CN104971605A (en) | 2015-06-24 | 2015-06-24 | Coal-fired flue gas treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104971605A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105771581A (en) * | 2016-04-29 | 2016-07-20 | 中南大学 | Desulphurization and denitrogenation integrated method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5637029A (en) * | 1979-08-31 | 1981-04-10 | Mitsubishi Heavy Ind Ltd | Reduction of nox in exhaust gas |
| CN1060613A (en) * | 1990-09-14 | 1992-04-29 | 卡明斯发电有限公司 | Be used for removing the method and apparatus of nitrogen oxide from air-flow |
| CN102755829A (en) * | 2012-08-06 | 2012-10-31 | 北京世能中晶能源科技有限公司 | Desulfurizer and application thereof |
| CN103768931A (en) * | 2012-10-10 | 2014-05-07 | 韩国能源技术研究院 | Production method and apparatus of hollow fluidizing material |
| CN103877990A (en) * | 2014-04-14 | 2014-06-25 | 重庆大学 | Polynary metallic oxide denitration catalyst |
| 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 |
| CN204307516U (en) * | 2014-12-14 | 2015-05-06 | 无锡市华星电力环保修造有限公司 | A kind of coal-burning boiler for flue gas desulfurization, denitration device |
-
2015
- 2015-06-24 CN CN201510352188.0A patent/CN104971605A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5637029A (en) * | 1979-08-31 | 1981-04-10 | Mitsubishi Heavy Ind Ltd | Reduction of nox in exhaust gas |
| CN1060613A (en) * | 1990-09-14 | 1992-04-29 | 卡明斯发电有限公司 | Be used for removing the method and apparatus of nitrogen oxide from air-flow |
| CN102755829A (en) * | 2012-08-06 | 2012-10-31 | 北京世能中晶能源科技有限公司 | Desulfurizer and application thereof |
| CN103768931A (en) * | 2012-10-10 | 2014-05-07 | 韩国能源技术研究院 | Production method and apparatus of hollow fluidizing material |
| 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 |
| CN103877990A (en) * | 2014-04-14 | 2014-06-25 | 重庆大学 | Polynary metallic oxide denitration catalyst |
| CN204307516U (en) * | 2014-12-14 | 2015-05-06 | 无锡市华星电力环保修造有限公司 | A kind of coal-burning boiler for flue gas desulfurization, denitration device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105771581A (en) * | 2016-04-29 | 2016-07-20 | 中南大学 | Desulphurization and denitrogenation integrated method |
| CN105771581B (en) * | 2016-04-29 | 2018-05-22 | 中南大学 | Desulfurization and denitrification integral method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9011808B2 (en) | Method for removing impurities from gas flows comprising oxygen | |
| AU2011259879B2 (en) | Exhaust gas treatment system and method | |
| CN102895857A (en) | Comprehensive waste incineration flue gas purification system and purification method thereof | |
| EP2578298A1 (en) | Exhaust gas processing system and method | |
| KR102114062B1 (en) | METHOD FOR REMOVING SOx FROM GAS USING POLYOL COMPLEX SOLUTION | |
| CN107551799B (en) | Dry-method cement kiln flue gas desulfurization and denitrification integrated method | |
| WO2010091638A1 (en) | Method for removing sox from gas using polyethylene glycol | |
| CN103170228B (en) | A kind of denitrating flue gas mixed solution and application process thereof | |
| CN101632897B (en) | Method for simultaneously removing sulfur oxides and nitric oxides in flue gas | |
| CN108704474B (en) | Coke oven flue gas and Claus tail gas combined treatment process | |
| CN106430111A (en) | Method for preparing sulfur by recycling sulfur dioxide from flue gas | |
| CN102658013A (en) | Low-temperature selective catalytic reduction (SCR) fixed bed flue gas denitrification device and method for coal-fired boiler | |
| CN105327614B (en) | SO in joint removing coal-fired flue-gas2、NOXWith the method for Hg pollutants | |
| PL2144690T3 (en) | Method for purifying flue gases from incinerators and then producing urea | |
| CN104971591A (en) | Solid desulfurizing agent for coal-fired flue gas | |
| US5827488A (en) | Process for removing SO2 and NOx from a gaseous stream | |
| CN104971605A (en) | Coal-fired flue gas treatment method | |
| CN105771652A (en) | Flue gas denitration method by taking manganese oxide as cyclic absorption medium | |
| CN103230743A (en) | Nitrogen oxide tail gas emission reduction method | |
| CN104998488A (en) | Method for treating coal-fired flue gas pollutant | |
| CN107297144B (en) | Desulfurization and denitrification agent and preparation method and application thereof | |
| CN105709595A (en) | System and method for synchronously performing low-temperature denitration and desulfuration on coke oven smoke | |
| CN206463781U (en) | A kind of desulfuring and denitrifying apparatus of coke oven flue gas | |
| CN104959145A (en) | Solid catalyst used for denitration of coal-fired flue gas | |
| CN203170177U (en) | Device for purifying ventilation air methane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
Application publication date: 20151014 |
|
| RJ01 | Rejection of invention patent application after publication |