JPS5472763A - Denitrating method - Google Patents
Denitrating methodInfo
- Publication number
- JPS5472763A JPS5472763A JP13992977A JP13992977A JPS5472763A JP S5472763 A JPS5472763 A JP S5472763A JP 13992977 A JP13992977 A JP 13992977A JP 13992977 A JP13992977 A JP 13992977A JP S5472763 A JPS5472763 A JP S5472763A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- temp
- header
- superheater
- atmosphere
- 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 remove NOx completely and that without residual NH3 in denitration of exhaust gas, by addn. of excessive reducing agent into high-temp. atmosphere in downstream side.
CONSTITUTION: To remove NOx contained in exhaust combustion gas of a boiler 1, NH3 is sprayed into the exhaust gas respectively through a header 14a located at upstream side of a secondary superheater 4, which is in high-temp. atmosphere not lowr than about 700°C, and through a header 14b located between superheater 4 and a repeater 5. If necessary, NH3 is sprayed through a header 18 located at the upstream side of a primary superheater 6. Then H2O2 is fed by a H2O2 spray feeding apparatus 32 into the low-temp. exhaust gas atmosphere of about 500W 600°C between the primary superheater 6 and an economizer 7 in order to remove residual NOx. Gas gathered by a gas collector 33 is analyzed 24. The signal of the analyzed value and the measurement signal from a gas flow meter 34 are fed to a control box 25. The command given by the control box 25 controls the valve 36 in the H2O2 feed-pipe and flow control valves 16, 16a for NH3.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13992977A JPS5472763A (en) | 1977-11-24 | 1977-11-24 | Denitrating method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13992977A JPS5472763A (en) | 1977-11-24 | 1977-11-24 | Denitrating method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5472763A true JPS5472763A (en) | 1979-06-11 |
Family
ID=15256942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13992977A Pending JPS5472763A (en) | 1977-11-24 | 1977-11-24 | Denitrating method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5472763A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5017347A (en) * | 1987-02-13 | 1991-05-21 | Fuel Tech, Inc. | Process for nitrogen oxides reduction and minimization of the production of other pollutants |
US5057293A (en) * | 1987-02-13 | 1991-10-15 | Fuel Tech, Inc. | Multi-stage process for reducing the concentration of pollutants in an effluent |
-
1977
- 1977-11-24 JP JP13992977A patent/JPS5472763A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5017347A (en) * | 1987-02-13 | 1991-05-21 | Fuel Tech, Inc. | Process for nitrogen oxides reduction and minimization of the production of other pollutants |
US5057293A (en) * | 1987-02-13 | 1991-10-15 | Fuel Tech, Inc. | Multi-stage process for reducing the concentration of pollutants in an effluent |
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