JPS5743120A - Operation of low nox boiler - Google Patents

Operation of low nox boiler

Info

Publication number
JPS5743120A
JPS5743120A JP55118368A JP11836880A JPS5743120A JP S5743120 A JPS5743120 A JP S5743120A JP 55118368 A JP55118368 A JP 55118368A JP 11836880 A JP11836880 A JP 11836880A JP S5743120 A JPS5743120 A JP S5743120A
Authority
JP
Japan
Prior art keywords
nox
exhaust gas
air ratio
burner
exhaust
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
Application number
JP55118368A
Other languages
Japanese (ja)
Other versions
JPH0220896B2 (en
Inventor
Yoshito Kawaguchi
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 JP55118368A priority Critical patent/JPS5743120A/en
Publication of JPS5743120A publication Critical patent/JPS5743120A/en
Publication of JPH0220896B2 publication Critical patent/JPH0220896B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties

Abstract

PURPOSE:To prevent accidental discharge of NOx, by monitoring NOx content in an exhaust at all times, controlling the air ratio when the NOx value has exceeded a predetermined value, and changing the flow of exhaust to an exhaust gas duct having an NOx eliminator. CONSTITUTION:From the lower part of a furnance side wall are successively arranged a main burner M having an air ratio forming a somewhat incomplete burning region, a sub-burner P forming a burning region with a low air ratio, and an after burner O having an excessive air ratio for combustion. An exhaust gas sampling opening 15 is arranged downstream of an exhaust gas duct 14 for continuously measuring NOx values, and its signal is sent to a control box 17 that compares the stored value with the measured value and issues a command signal to adjust the amounts of air to the burners M, P, O and to control dampers 6, 8a, 8b so that the exhaust gas is flowed via a by-pass duct 8, and therefore accidental discharge of NOx can be prevented.
JP55118368A 1980-08-29 1980-08-29 Operation of low nox boiler Granted JPS5743120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55118368A JPS5743120A (en) 1980-08-29 1980-08-29 Operation of low nox boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55118368A JPS5743120A (en) 1980-08-29 1980-08-29 Operation of low nox boiler

Publications (2)

Publication Number Publication Date
JPS5743120A true JPS5743120A (en) 1982-03-11
JPH0220896B2 JPH0220896B2 (en) 1990-05-11

Family

ID=14734972

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55118368A Granted JPS5743120A (en) 1980-08-29 1980-08-29 Operation of low nox boiler

Country Status (1)

Country Link
JP (1) JPS5743120A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59196964A (en) * 1983-04-21 1984-11-08 Hitachi Zosen Corp Combustion under supplying different kinds of fuels in two steps
JPS6043832U (en) * 1983-09-05 1985-03-28 バブコツク日立株式会社 Waste heat recovery equipment
US5190454A (en) * 1991-07-15 1993-03-02 Cmi Corporation Electronic combustion control system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH054384U (en) * 1991-06-21 1993-01-22 日本電気ホームエレクトロニクス株式会社 Rotating disk pseudo stationary device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345727A (en) * 1976-10-08 1978-04-24 Daido Steel Co Ltd Air fuel ratio control method and air fuel ratio controller for direct fire system continuous furnace
JPS53130272A (en) * 1977-04-21 1978-11-14 Babcock Hitachi Kk Denitrating apparatus
JPS5495020A (en) * 1978-01-11 1979-07-27 Mitsubishi Heavy Ind Ltd Fuel combustion system for boiler

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345727A (en) * 1976-10-08 1978-04-24 Daido Steel Co Ltd Air fuel ratio control method and air fuel ratio controller for direct fire system continuous furnace
JPS53130272A (en) * 1977-04-21 1978-11-14 Babcock Hitachi Kk Denitrating apparatus
JPS5495020A (en) * 1978-01-11 1979-07-27 Mitsubishi Heavy Ind Ltd Fuel combustion system for boiler

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59196964A (en) * 1983-04-21 1984-11-08 Hitachi Zosen Corp Combustion under supplying different kinds of fuels in two steps
JPH0128845B2 (en) * 1983-04-21 1989-06-06 Hitachi Shipbuilding Eng Co
JPS6043832U (en) * 1983-09-05 1985-03-28 バブコツク日立株式会社 Waste heat recovery equipment
US5190454A (en) * 1991-07-15 1993-03-02 Cmi Corporation Electronic combustion control system

Also Published As

Publication number Publication date
JPH0220896B2 (en) 1990-05-11

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