JPS57159527A - System for controlling reductant injecting amount in denitration apparatus - Google Patents

System for controlling reductant injecting amount in denitration apparatus

Info

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
Application number
JP56043204A
Other languages
Japanese (ja)
Inventor
Tetsuo Yamaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Power Ltd
Original Assignee
Babcock Hitachi KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Babcock Hitachi KK filed Critical Babcock Hitachi KK
Priority to JP56043204A priority Critical patent/JPS57159527A/en
Publication of JPS57159527A publication Critical patent/JPS57159527A/en
Pending legal-status Critical Current

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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
JP56043204A 1981-03-26 1981-03-26 System for controlling reductant injecting amount in denitration apparatus Pending JPS57159527A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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