JPS57207703A - Low nox combustion method with improved boiler efficiency - Google Patents

Low nox combustion method with improved boiler efficiency

Info

Publication number
JPS57207703A
JPS57207703A JP9160981A JP9160981A JPS57207703A JP S57207703 A JPS57207703 A JP S57207703A JP 9160981 A JP9160981 A JP 9160981A JP 9160981 A JP9160981 A JP 9160981A JP S57207703 A JPS57207703 A JP S57207703A
Authority
JP
Japan
Prior art keywords
combustion
air
furnace
exhaust gas
supplied
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
JP9160981A
Other languages
Japanese (ja)
Inventor
Shigeki Morita
Kunio Okiura
Iwao Akiyama
Akira Baba
Shoichi Masuko
Isao Koyama
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 JP9160981A priority Critical patent/JPS57207703A/en
Publication of JPS57207703A publication Critical patent/JPS57207703A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2201/00—Staged combustion
    • F23C2201/10—Furnace staging
    • F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

PURPOSE:To obtain a high NOx removing efficiency by supplying at least a part of shortage air from the bottom of a furnace in a combustion in which the combustion at a burner part is carried out at an air ratio of 1 or less and an unburnt matter is burnt by the air corresponding to the shortage air supplied through such as an after-airport. CONSTITUTION:A plurality o burners 30 arranged in the furnace 10 are set to have the air ratio of 1 or less, and a low oxygen combustion is carried out by recirculating a part of exhaust gas G through a duct 61. NOx produced in the low oxygen combustion is reduced into N2 in contact with reductive intermediate products such as CN or CO which is also produced in the combustion. In this instance, a gas mixture is supplied from the bottom of the furnace of the recirculated exhaust gas G through the recirculated exhaust gas duct 62 and a combustion air through air ducts 51 and 52. A part of this combustion air is supplied through the after-airport 31 for combustion of the unburnt matter at such a regulated rate as to set the total amount of the air at a necessary and minimum value for the combustion of unburnt substance.
JP9160981A 1981-06-16 1981-06-16 Low nox combustion method with improved boiler efficiency Pending JPS57207703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9160981A JPS57207703A (en) 1981-06-16 1981-06-16 Low nox combustion method with improved boiler efficiency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9160981A JPS57207703A (en) 1981-06-16 1981-06-16 Low nox combustion method with improved boiler efficiency

Publications (1)

Publication Number Publication Date
JPS57207703A true JPS57207703A (en) 1982-12-20

Family

ID=14031307

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9160981A Pending JPS57207703A (en) 1981-06-16 1981-06-16 Low nox combustion method with improved boiler efficiency

Country Status (1)

Country Link
JP (1) JPS57207703A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63126718U (en) * 1987-02-10 1988-08-18
FR2951525A1 (en) * 2009-10-21 2011-04-22 Fives Pillard METHOD FOR OPERATING A BOILER

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63126718U (en) * 1987-02-10 1988-08-18
FR2951525A1 (en) * 2009-10-21 2011-04-22 Fives Pillard METHOD FOR OPERATING A BOILER
EP2314921A2 (en) 2009-10-21 2011-04-27 Fives Pillard Method of operating a boiler
EP2314921A3 (en) * 2009-10-21 2011-09-07 Fives Pillard Method of operating a boiler

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