JPS56163741A - Method for controlling feed rate or nh3 in dry denitration apparatus - Google Patents
Method for controlling feed rate or nh3 in dry denitration apparatusInfo
- Publication number
- JPS56163741A JPS56163741A JP6726580A JP6726580A JPS56163741A JP S56163741 A JPS56163741 A JP S56163741A JP 6726580 A JP6726580 A JP 6726580A JP 6726580 A JP6726580 A JP 6726580A JP S56163741 A JPS56163741 A JP S56163741A
- Authority
- JP
- Japan
- Prior art keywords
- waste gas
- nox
- signal
- feed rate
- feed
- 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.)
- Granted
Links
Landscapes
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
PURPOSE: To maintain the NOx concn. at the outlet of a reactor constant and to control the feed rate of NH3 by correcting th change in process gain by means of the flow rate of waste gas in a dry type catalytic reduction denitration method.
CONSTITUTION: In the dry type catalytic reduction denitration of NOx in waste gas controlling the feeding of NH3 in order to make the NOx concn. at the outlet of the reactor constant, the signals of a waste gas flowmeter 1, an NOx densitometer 2 and a waste gas thermometer 3 are sent to an arithmetic device 9. In this device 9, the feed rate FA of ammonia is calculated and is inputted as a feed-forward signal to an adder 8. On the other hand, the signal of the NOx densitometer 4 is transmitted to a controller 10, which compares the same with a preset signal 12 and inputs the signal to a multiplier 7. Here, it is multipled by the valve of the waste gas flowmeter 1 in order to correct the process gain Kp, thereafter, it is sent as a feed- forward signal to the adder 8, which adds the same to the feedback signal, thereby controlling a valve 6 for a gaseous NH3 gas.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6726580A JPS56163741A (en) | 1980-05-20 | 1980-05-20 | Method for controlling feed rate or nh3 in dry denitration apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6726580A JPS56163741A (en) | 1980-05-20 | 1980-05-20 | Method for controlling feed rate or nh3 in dry denitration apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56163741A true JPS56163741A (en) | 1981-12-16 |
JPS6312650B2 JPS6312650B2 (en) | 1988-03-22 |
Family
ID=13339950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6726580A Granted JPS56163741A (en) | 1980-05-20 | 1980-05-20 | Method for controlling feed rate or nh3 in dry denitration apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56163741A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58174227A (en) * | 1982-04-06 | 1983-10-13 | Babcock Hitachi Kk | Method for controlling charging amount of ammonia in denitration apparatus |
JPS5955334A (en) * | 1982-09-22 | 1984-03-30 | Babcock Hitachi Kk | System for controlling injection of reducing agent in denitrator for stack gas |
JPS6034719A (en) * | 1983-08-04 | 1985-02-22 | Babcock Hitachi Kk | Controlling device of ammonia injection for denitration apparatus |
JPS6233532A (en) * | 1985-08-06 | 1987-02-13 | Toshiba Corp | Control device for waste gas denitration |
JP2003010645A (en) * | 2001-07-03 | 2003-01-14 | Babcock Hitachi Kk | Method and apparatus for controlling ammonia injection amount to nitrogen oxide removal apparatus and ammonia injection amount correcting apparatus to be employed therefor |
JP2013017934A (en) * | 2011-07-08 | 2013-01-31 | Ihi Corp | Denitration device and denitration method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5140371A (en) * | 1974-10-04 | 1976-04-05 | Mitsubishi Heavy Ind Ltd | Haigasuchuno nox no nh3 setsushokukangenhoniokeru nh3 chunyuryoseigyohoho |
JPS5333977A (en) * | 1976-09-10 | 1978-03-30 | Unitika Ltd | Automatically controlling method for quantity of introduced nh3 in denitration plant for flue gas |
-
1980
- 1980-05-20 JP JP6726580A patent/JPS56163741A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5140371A (en) * | 1974-10-04 | 1976-04-05 | Mitsubishi Heavy Ind Ltd | Haigasuchuno nox no nh3 setsushokukangenhoniokeru nh3 chunyuryoseigyohoho |
JPS5333977A (en) * | 1976-09-10 | 1978-03-30 | Unitika Ltd | Automatically controlling method for quantity of introduced nh3 in denitration plant for flue gas |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58174227A (en) * | 1982-04-06 | 1983-10-13 | Babcock Hitachi Kk | Method for controlling charging amount of ammonia in denitration apparatus |
JPH0411248B2 (en) * | 1982-04-06 | 1992-02-27 | ||
JPS5955334A (en) * | 1982-09-22 | 1984-03-30 | Babcock Hitachi Kk | System for controlling injection of reducing agent in denitrator for stack gas |
JPH0351453B2 (en) * | 1982-09-22 | 1991-08-06 | Babcock Hitachi Kk | |
JPS6034719A (en) * | 1983-08-04 | 1985-02-22 | Babcock Hitachi Kk | Controlling device of ammonia injection for denitration apparatus |
JPH0364170B2 (en) * | 1983-08-04 | 1991-10-04 | Babcock Hitachi Kk | |
JPS6233532A (en) * | 1985-08-06 | 1987-02-13 | Toshiba Corp | Control device for waste gas denitration |
JP2003010645A (en) * | 2001-07-03 | 2003-01-14 | Babcock Hitachi Kk | Method and apparatus for controlling ammonia injection amount to nitrogen oxide removal apparatus and ammonia injection amount correcting apparatus to be employed therefor |
JP4627611B2 (en) * | 2001-07-03 | 2011-02-09 | バブコック日立株式会社 | Ammonia injection amount control method and apparatus for denitration apparatus and ammonia injection amount correction device |
JP2013017934A (en) * | 2011-07-08 | 2013-01-31 | Ihi Corp | Denitration device and denitration method |
Also Published As
Publication number | Publication date |
---|---|
JPS6312650B2 (en) | 1988-03-22 |
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