JPS57166409A - Low nox boiler - Google Patents

Low nox boiler

Info

Publication number
JPS57166409A
JPS57166409A JP56051222A JP5122281A JPS57166409A JP S57166409 A JPS57166409 A JP S57166409A JP 56051222 A JP56051222 A JP 56051222A JP 5122281 A JP5122281 A JP 5122281A JP S57166409 A JPS57166409 A JP S57166409A
Authority
JP
Japan
Prior art keywords
burners
low
value
damper
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.)
Granted
Application number
JP56051222A
Other languages
Japanese (ja)
Other versions
JPH0117046B2 (en
Inventor
Kaetsu Isoda
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 JP56051222A priority Critical patent/JPS57166409A/en
Publication of JPS57166409A publication Critical patent/JPS57166409A/en
Publication of JPH0117046B2 publication Critical patent/JPH0117046B2/ja
Granted 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 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber

Landscapes

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

Abstract

PURPOSE:To restrain the NOx value at medium and low load operations to a low value and protect burners from high temperature atmosphere by a method wherein a controlling box is provided controlling the cooling of the burners, which are extinguished and put out of operation, by supplying recirculation exhause gas alone thereto. CONSTITUTION:Twenty-four burners are provided at the frong wall side and twenty- four burners at the rear wall side of the large size low NOx boiler. The burners are arranged in four rows, each of which consists of two groups: the group of burners A1, A2 and A3 and the group of burners A4, A5 and A6. The flow rate of mixture gas to be supplied to a burner is individually controlled with dampers 3A1, 3B, .... The controlling of the recirculation gas to be supplied to the group of burners A1, A2 and A3 is performed with a damper 3ARG13. When the grup of burners A1, A2 and A3 is extinguished and put out of operation, only the recirculation exhaust gas is supplied to the burners A1, A2 and A3 by closing a damper 3A13 and opening the damper 3ARG13 in order to cool them. As a result, the NOx value in exhaust gas can be restrained to remarkably low value at medium and low load operations and yet the necessary operation for realizaton of low NOx value is performed only by operating the dampers.
JP56051222A 1981-04-07 1981-04-07 Low nox boiler Granted JPS57166409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56051222A JPS57166409A (en) 1981-04-07 1981-04-07 Low nox boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56051222A JPS57166409A (en) 1981-04-07 1981-04-07 Low nox boiler

Publications (2)

Publication Number Publication Date
JPS57166409A true JPS57166409A (en) 1982-10-13
JPH0117046B2 JPH0117046B2 (en) 1989-03-28

Family

ID=12880902

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56051222A Granted JPS57166409A (en) 1981-04-07 1981-04-07 Low nox boiler

Country Status (1)

Country Link
JP (1) JPS57166409A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58185710U (en) * 1982-06-04 1983-12-09 三菱重工業株式会社 gas fuel combustion equipment
JPS6069411A (en) * 1983-08-31 1985-04-20 Mitsubishi Heavy Ind Ltd Burner device
JPS6397012U (en) * 1986-12-08 1988-06-23
JP2011089711A (en) * 2009-10-22 2011-05-06 Hitachi Ltd Method for modifying pulverized coal boiler

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58185710U (en) * 1982-06-04 1983-12-09 三菱重工業株式会社 gas fuel combustion equipment
JPS6069411A (en) * 1983-08-31 1985-04-20 Mitsubishi Heavy Ind Ltd Burner device
JPS6397012U (en) * 1986-12-08 1988-06-23
JP2011089711A (en) * 2009-10-22 2011-05-06 Hitachi Ltd Method for modifying pulverized coal boiler

Also Published As

Publication number Publication date
JPH0117046B2 (en) 1989-03-28

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