JPS5522386A - Reduction of nox in combustion exhaust gas - Google Patents
Reduction of nox in combustion exhaust gasInfo
- Publication number
- JPS5522386A JPS5522386A JP9654778A JP9654778A JPS5522386A JP S5522386 A JPS5522386 A JP S5522386A JP 9654778 A JP9654778 A JP 9654778A JP 9654778 A JP9654778 A JP 9654778A JP S5522386 A JPS5522386 A JP S5522386A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- air
- added
- gas
- urea
- 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
- Treating Waste Gases (AREA)
Abstract
PURPOSE: To reduce NOx present in exhaust gas simply and effectively by the procedure in which ammonia and urea are added to combustion exhaust gas from boiler, etc., under an air-shortage condition and then air for removing unburned content is added to the gas.
CONSTITUTION: After the main combustion of fuel is made under an air-shortage condition, ammonia and an ammonia precursory substance, e.g., urea, etc., are added to exhaust gas of more than 1200°C, and then sufficient air is added to the gas to fire unburned residue in order to reduce NOx present in the exhaust gas. For example, the main combustion of fuel in the furnace 1a is made under a condition of slightly excessive fuel, or an air-shortage condition, and then NH3 gas or a NH3-forming substance, e.g., urea, etc., is added from the line 6 into the exhaust gas of more than 1200°C in order to decompose NOx present in the exhaust gas into harmless gas N2. Then, unburned content, e.g., CO, etc., staying in the exhaust gas is fully oxidized by air supplied from the line 8.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9654778A JPS5522386A (en) | 1978-08-08 | 1978-08-08 | Reduction of nox in combustion exhaust gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9654778A JPS5522386A (en) | 1978-08-08 | 1978-08-08 | Reduction of nox in combustion exhaust gas |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5522386A true JPS5522386A (en) | 1980-02-18 |
Family
ID=14168110
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9654778A Pending JPS5522386A (en) | 1978-08-08 | 1978-08-08 | Reduction of nox in combustion exhaust gas |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5522386A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013072571A (en) * | 2011-09-27 | 2013-04-22 | Takuma Co Ltd | Exhaust gas treating system |
-
1978
- 1978-08-08 JP JP9654778A patent/JPS5522386A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013072571A (en) * | 2011-09-27 | 2013-04-22 | Takuma Co Ltd | Exhaust gas treating system |
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