CN102688689A - Flue gas denitration method - Google Patents
Flue gas denitration method Download PDFInfo
- Publication number
- CN102688689A CN102688689A CN2012101820831A CN201210182083A CN102688689A CN 102688689 A CN102688689 A CN 102688689A CN 2012101820831 A CN2012101820831 A CN 2012101820831A CN 201210182083 A CN201210182083 A CN 201210182083A CN 102688689 A CN102688689 A CN 102688689A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- denitration
- gas denitration
- active carbon
- catalyst
- 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
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 11
- 239000003546 flue gas Substances 0.000 description 11
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 10
- 229910021529 ammonia Inorganic materials 0.000 description 7
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- 239000004202 carbamide Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000006555 catalytic reaction Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 229910010413 TiO 2 Inorganic materials 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a method for implementing denitration on flue gas by using active carbon as a catalyst and using ammonium hydrogen carbonate as a reducing agent, which is a brand-new flue gas denitration method. The method is high in denitration efficiency, the initial investment and the running cost of the method are further lower than those of the conventional denitration method, and the method has huge promotion effects of reducing the cost for flue gas denitration in enterprises and improving the atmospheric environment of China.
Description
Technical field
With the active carbon is catalyst, is that reducing agent is to carry out denitrating flue gas under the 180-240 ℃ of condition in temperature with carbonic hydroammonium.
Background technology
China's nitrogen oxide emission is the trend that increases year by year; If the discharging of nitrogen oxide is not controlled; Cut down the effort of sulfur dioxide 10% during China's " 11th Five-Year "; To offset because of the remarkable rising of discharged nitrous oxides is complete, therefore country classifies nitrogen oxide into " 12 " as reduces discharging one of index.Currently used method of denitration mainly is to be the SCR method of catalyst with titania-based.The temperature required height of SCR method denitration, heat-energy losses is big, TiO 2-based catalyst expensive and dependence on import.The reducing agent that the SCR method is used mainly contains three kinds in liquefied ammonia, ammoniacal liquor and urea; Use liquefied ammonia investment and operating cost to save most; But liquefied ammonia is the Class B dangerous goods of national regulation, and reserves surpass 40 tons and promptly are defined as major hazard source, therefore stores with transportation all to have the Environmental security risk.Considering under the situation of safety factor that some thermal power plants use urea as the SCR reducing agent, urea is nontoxic; And be graininess, be easy to store, but its chemical property be stable; Being used for the SCR denitration need be dissolved as 50% aqueous solution posthydrolysis or pyrolysis and just can make the required ammonia of SCR; It is high to consume steam or fuel quantity, so urea system ammonia system is complicated, and initial cost and operating cost are high.
Summary of the invention
The present invention is in order to solve currently used flue-gas denitration process denitration energy consumption height, initial cost and the high problem of operating cost.
The technical scheme that the present invention adopted is: substituting the TiO 2-based catalyst that uses in the current SCR device with active carbon, is reducing agent with carbonic hydroammonium, is to carry out denitrating flue gas under the 180-240 ℃ of condition in temperature.
Beneficial effect of the present invention is: denitration efficiency is high, energy consumption is low, safety coefficient is high, initial cost and operating cost are low.Denitration efficiency of the present invention can reach more than 90%.The present invention adopts active carbon as catalyst, handles the equivalent flue gas and reduces investment outlay 95% than TiO 2-based catalyst.Carbonic hydroammonium does not exist storage and transportation environment security risk, produces the NH of equivalent
3, it is low more than 50% that carbonic hydroammonium decomposes energy consumption rate urea, and investment is low more than 15%.Carbonic hydroammonium is the distinctive chemical fertilizer of a kind of China in addition, and raw material sources are extensively sufficient, meet national conditions.
The specific embodiment
Present embodiment is by coal steam-electric plant smoke, and the catalysis post of active carbon is housed, carbonic hydroammonium injection apparatus, nitrogen oxide automonitor, formations such as connecting line.
Concrete experimental procedure is following:
1, coal steam-electric plant smoke is fed in the activated carbon catalysis post through pipeline, measure flue-gas temperature and NOx concentration simultaneously.
2, in flue gas, evenly spray the carbonic hydroammonium powder in activated carbon catalysis post import department, get in the active carbon with flue gas.
3, measure the NOx concentration in the activated carbon catalysis column outlet place flue gas with the nitrogen oxide automatic monitor, measure the escaping of ammonia of flue gas through absorption liquid.
4, this test was whenever carried out 1 time at a distance from 8 hours, continued 1 hour at every turn, carried out altogether 3 times.
Experimental result is following:
| ? | 1 | 2 | 3 |
| Flue-gas temperature (℃) | 208 | 196 | 210 |
| Import mean concentration (ppm) | 1256 | 1305 | 1268 |
| Outlet mean concentration (ppm) | <100 | <100 | <100 |
| Denitration efficiency (%) | >;92.0 | >;92.3 | >;92.1 |
| The escaping of ammonia (ppm) | 92 | 87 | 93 |
Claims (2)
1. the method for a denitrating flue gas, it is characterized in that: with the active carbon is catalyst, is that reducing agent carries out denitrating flue gas with carbonic hydroammonium.
2. according to the method for claims 1 described a kind of denitrating flue gas, it is characterized in that: denitrating flue gas carries out under 180-240 ℃ of condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101820831A CN102688689A (en) | 2012-06-05 | 2012-06-05 | Flue gas denitration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101820831A CN102688689A (en) | 2012-06-05 | 2012-06-05 | Flue gas denitration method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102688689A true CN102688689A (en) | 2012-09-26 |
Family
ID=46854522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101820831A Pending CN102688689A (en) | 2012-06-05 | 2012-06-05 | Flue gas denitration method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102688689A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107413166A (en) * | 2017-03-27 | 2017-12-01 | 郑经堂 | The method for recycling charcoal base poromerics processing nitrous oxides exhaust gas |
| CN111974186A (en) * | 2020-07-22 | 2020-11-24 | 南通润启环保服务有限公司 | Flue gas SNCR (selective non-catalytic reduction) denitration agent and preparation method thereof |
| CN113262631A (en) * | 2021-05-21 | 2021-08-17 | 浙江兴利盛环保设备有限公司 | Nano denitration agent, preparation method and denitration method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549298A (en) * | 2008-03-31 | 2009-10-07 | 卡博特克Ac有限责任公司 | Activated carbon catalyst |
| CN101711943A (en) * | 2009-09-15 | 2010-05-26 | 华东理工大学 | Method for controlling pollutant waste gas containing NO through low-temperature liquid phase catalytic reduction |
| CN201832535U (en) * | 2010-09-29 | 2011-05-18 | 解娟 | Desulfurization and denitration integrated device utilizing carbon method |
-
2012
- 2012-06-05 CN CN2012101820831A patent/CN102688689A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549298A (en) * | 2008-03-31 | 2009-10-07 | 卡博特克Ac有限责任公司 | Activated carbon catalyst |
| CN101711943A (en) * | 2009-09-15 | 2010-05-26 | 华东理工大学 | Method for controlling pollutant waste gas containing NO through low-temperature liquid phase catalytic reduction |
| CN201832535U (en) * | 2010-09-29 | 2011-05-18 | 解娟 | Desulfurization and denitration integrated device utilizing carbon method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107413166A (en) * | 2017-03-27 | 2017-12-01 | 郑经堂 | The method for recycling charcoal base poromerics processing nitrous oxides exhaust gas |
| CN107413166B (en) * | 2017-03-27 | 2020-04-28 | 郑经堂 | Method for treating nitrogen oxide waste gas by recycling carbon-based microporous material |
| CN111974186A (en) * | 2020-07-22 | 2020-11-24 | 南通润启环保服务有限公司 | Flue gas SNCR (selective non-catalytic reduction) denitration agent and preparation method thereof |
| CN113262631A (en) * | 2021-05-21 | 2021-08-17 | 浙江兴利盛环保设备有限公司 | Nano denitration agent, preparation method and denitration method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120926 |