JPS5658522A - Denitrification method of exhaust gas - Google Patents
Denitrification method of exhaust gasInfo
- Publication number
- JPS5658522A JPS5658522A JP13437279A JP13437279A JPS5658522A JP S5658522 A JPS5658522 A JP S5658522A JP 13437279 A JP13437279 A JP 13437279A JP 13437279 A JP13437279 A JP 13437279A JP S5658522 A JPS5658522 A JP S5658522A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- denitrification
- economizer
- catalysts
- exhaust gas
- 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
Abstract
PURPOSE: To control the temp. of a denitrification reactor and prevent the low- temp. degradation of the activity of denitrification catalysts by providing the bypass line for exhaust gases in the economizer part at the time of denitrifying the exhaust gases of boilers, etc. using heavy crude oil, coal, etc.
CONSTITUTION: A bypass gas line 10 is beforehand provided between the inlet of the economizer 2 of a boiler 1 using heavy crude oil or coal as a fuel and the inlet of a denitrification reactor 5. The exhaust gas of the boiler passes the economizer 2, where it is aded with ammonia 4 and the NOX reacts with NH3 in the presence of catalysts in the denitrification reactor and is thereby reduced to harmless N2. If in this case the exhaust gas temp. at the outlet of the economizer 2 lowers to ≤(400W 450°C), the activity of the catalysts lowers and denitrification reaction degrades. In such a case, the valve 11 of the bypass line 10 is opened to flow part of the high- temp. exhaust gas, whereby the temp. of the denitrification reactor 5 is kept within the above-mentioned range and this prevents the low-temp. degradation of the activity of the catalysts and the decrease in denitrification reaction.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13437279A JPS5658522A (en) | 1979-10-18 | 1979-10-18 | Denitrification method of exhaust gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13437279A JPS5658522A (en) | 1979-10-18 | 1979-10-18 | Denitrification method of exhaust gas |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5658522A true JPS5658522A (en) | 1981-05-21 |
Family
ID=15126839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13437279A Pending JPS5658522A (en) | 1979-10-18 | 1979-10-18 | Denitrification method of exhaust gas |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5658522A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61200838A (en) * | 1985-03-04 | 1986-09-05 | Mitsubishi Heavy Ind Ltd | Boiler with denitration apparatus |
WO2008111240A1 (en) * | 2007-03-09 | 2008-09-18 | Mitsubishi Heavy Industries, Ltd. | Apparatus and method for treating discharge gas |
JP2012120989A (en) * | 2010-12-09 | 2012-06-28 | Ihi Corp | Exhaust gas denitrizer and method for controlling operation of the same |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5318403B2 (en) * | 1974-11-29 | 1978-06-15 |
-
1979
- 1979-10-18 JP JP13437279A patent/JPS5658522A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5318403B2 (en) * | 1974-11-29 | 1978-06-15 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61200838A (en) * | 1985-03-04 | 1986-09-05 | Mitsubishi Heavy Ind Ltd | Boiler with denitration apparatus |
WO2008111240A1 (en) * | 2007-03-09 | 2008-09-18 | Mitsubishi Heavy Industries, Ltd. | Apparatus and method for treating discharge gas |
JP2008221087A (en) * | 2007-03-09 | 2008-09-25 | Mitsubishi Heavy Ind Ltd | Apparatus and method for treating exhaust gas |
US7887768B2 (en) | 2007-03-09 | 2011-02-15 | Mitsubishi Heavy Industries, Ltd. | Air pollution control apparatus and air pollution control method |
JP4719171B2 (en) * | 2007-03-09 | 2011-07-06 | 三菱重工業株式会社 | Exhaust gas treatment apparatus and method |
JP2012120989A (en) * | 2010-12-09 | 2012-06-28 | Ihi Corp | Exhaust gas denitrizer and method for controlling operation of the same |
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