JPS57159527A - System for controlling reductant injecting amount in denitration apparatus - Google Patents
System for controlling reductant injecting amount in denitration apparatusInfo
- Publication number
- JPS57159527A JPS57159527A JP56043204A JP4320481A JPS57159527A JP S57159527 A JPS57159527 A JP S57159527A JP 56043204 A JP56043204 A JP 56043204A JP 4320481 A JP4320481 A JP 4320481A JP S57159527 A JPS57159527 A JP S57159527A
- Authority
- JP
- Japan
- Prior art keywords
- calculated
- nox
- concn
- controller
- inlet
- 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 enable to carry out stable control of a reductant injecting amount in good responsiveness even when the NOX total amount in a treating gas is varied in a wide range by a method wherein average denitrating efficiency is calculated every at a definite time and the calculated result is used as the set signal of an NH3 injecting mole ratio.
CONSTITUTION: Difference of NOX concn. between the inlet and the outlet of a catalyst layer is calculated by NOX densitometers 11a, 11b and an operator 15 and a ratio of said concn. difference and the NOX concn. of the inlet side thereof is calculated by an operator 16 and deviation of the calculated value and a predetermined denitrating efficiency set signal 21 is calculated by a controller 22 to be used as the set signal of an NH3 pouring mole ratio. The NOX concn. signals of the inlet and the outlet sides of the catalyst layer is applied to computer and average denitrating efficiency is issued every at a definite time to be imparted to a denitration efficiency controller 22 as a feedback signal. An NH3 demand amount obtained by multiplying the inlet NOX total amount calculated from the inlet side NOX concn. and a treating gas flow amount signal 20 and the injecting mole ratio of the controller 22 in an operator 19 is compared to a practical NH3 flow amount in a controller 24 and, corresponding to the comparison date, an NH3 flow amount control valve 6 is adjusted to enable to carry out stable control.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56043204A JPS57159527A (en) | 1981-03-26 | 1981-03-26 | System for controlling reductant injecting amount in denitration apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56043204A JPS57159527A (en) | 1981-03-26 | 1981-03-26 | System for controlling reductant injecting amount in denitration apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57159527A true JPS57159527A (en) | 1982-10-01 |
Family
ID=12657393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56043204A Pending JPS57159527A (en) | 1981-03-26 | 1981-03-26 | System for controlling reductant injecting amount in denitration apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57159527A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4473537A (en) * | 1982-12-27 | 1984-09-25 | General Electric Company | Ammonia control system for NOx emission control for gas turbine exhaust |
US4473536A (en) * | 1982-12-27 | 1984-09-25 | General Electric Company | Catalytic pollution control system for gas turbine exhaust |
JPS61257221A (en) * | 1985-05-08 | 1986-11-14 | Nippon Kokan Kk <Nkk> | Controller for amount of ammonia to be blown in catalytic denitration |
EP1069287A2 (en) * | 1999-07-12 | 2001-01-17 | Ford Global Technologies, Inc. | Emission control system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55109436A (en) * | 1979-02-16 | 1980-08-22 | Sumitomo Heavy Ind Ltd | Nh3 pouring rate control method |
-
1981
- 1981-03-26 JP JP56043204A patent/JPS57159527A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55109436A (en) * | 1979-02-16 | 1980-08-22 | Sumitomo Heavy Ind Ltd | Nh3 pouring rate control method |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4473537A (en) * | 1982-12-27 | 1984-09-25 | General Electric Company | Ammonia control system for NOx emission control for gas turbine exhaust |
US4473536A (en) * | 1982-12-27 | 1984-09-25 | General Electric Company | Catalytic pollution control system for gas turbine exhaust |
JPS61257221A (en) * | 1985-05-08 | 1986-11-14 | Nippon Kokan Kk <Nkk> | Controller for amount of ammonia to be blown in catalytic denitration |
EP1069287A2 (en) * | 1999-07-12 | 2001-01-17 | Ford Global Technologies, Inc. | Emission control system |
EP1069287A3 (en) * | 1999-07-12 | 2002-06-19 | Ford Global Technologies, Inc. | Emission control system |
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