CA2091341A1 - An advanced overfire air system for no _control - Google Patents

An advanced overfire air system for no _control

Info

Publication number
CA2091341A1
CA2091341A1 CA2091341A CA2091341A CA2091341A1 CA 2091341 A1 CA2091341 A1 CA 2091341A1 CA 2091341 A CA2091341 A CA 2091341A CA 2091341 A CA2091341 A CA 2091341A CA 2091341 A1 CA2091341 A1 CA 2091341A1
Authority
CA
Canada
Prior art keywords
overfire air
compartments
overfire
furnace
separated
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
CA2091341A
Other languages
French (fr)
Other versions
CA2091341C (en
Inventor
John Leonard Marion
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.)
Alstom Power Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2091341A1 publication Critical patent/CA2091341A1/en
Application granted granted Critical
Publication of CA2091341C publication Critical patent/CA2091341C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/02—Disposition of air supply not passing through burner
    • 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 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F23C5/08—Disposition of burners
    • F23C5/32—Disposition of burners to obtain rotating flames, i.e. flames moving helically or spirally
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Air Supply (AREA)

Abstract

An advanced overfire air system for NOx control designed for use in a firing system of the type that is particularly suited for use in fossil fuel-fired furnaces and a method of operating such a furnace which embodies an advanced overfire air sys-tem. The advanced overfire air system for NOx control includes multi-elevations of overfire air compartments consisting of a plurality of close coupled overfire air compartments (84, 86) and a plurality of separated overfire air compartments (94, 96, 98). The close coupled overfire air (84, 86) compartments are supported at a first elevation in the furnace (10) and the sepa-rated overfire air compartments (94, 96, 98) are supported at a second elevation in the furnace (10) so as to be spaced from but aligned with the close coupled overfire air compartments (84, 86). Overfire air is supplied (106, 92) to both the close coupled overfire air compartments (84, 86) and the separated overfire air compartments (94, 96, 98) such that there is a predeter-mined most favorable distribution of overfire air therebetween, such that the overfire (106) air exiting from the separated over-fire air compartments (94, 96, 98) establishes a horizontal "spray" or "fan" distribution (124, 126, 128) of overfire air over the plan area of the furnace, and such that the overfire air (106) exits from the separated overfire air compartments (94, 96, 98) at velocities significantly higher than the velocities em-ployed heretofore.
CA002091341A 1990-10-31 1991-06-24 An advanced overfire air system for no _control Expired - Lifetime CA2091341C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60717790A 1990-10-31 1990-10-31
US07/607,177 1990-10-31

Publications (2)

Publication Number Publication Date
CA2091341A1 true CA2091341A1 (en) 1992-05-01
CA2091341C CA2091341C (en) 1995-12-05

Family

ID=24431152

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002091341A Expired - Lifetime CA2091341C (en) 1990-10-31 1991-06-24 An advanced overfire air system for no _control

Country Status (15)

Country Link
EP (1) EP0554254B1 (en)
JP (1) JP2731794B2 (en)
KR (1) KR970009483B1 (en)
AU (1) AU646677B2 (en)
BR (1) BR9107060A (en)
CA (1) CA2091341C (en)
CS (1) CS327791A3 (en)
DE (1) DE69121579D1 (en)
ES (1) ES2092573T3 (en)
FI (1) FI931941A (en)
HU (1) HUT65491A (en)
MX (1) MX9100537A (en)
WO (1) WO1992008078A1 (en)
YU (1) YU141991A (en)
ZA (1) ZA915500B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2752042B1 (en) * 1996-07-31 1998-09-11 Gec Alsthom Stein Ind SECONDARY AIR SUPPLY NOZZLE IN A COMBUSTION FIREPLACE
JP5658126B2 (en) * 2011-11-16 2015-01-21 三菱重工業株式会社 Oil burning burner, solid fuel burning burner unit and solid fuel burning boiler
CN102913898B (en) * 2012-10-16 2015-06-24 东方电气集团东方锅炉股份有限公司 Over-fire air distribution manner in front and back wall opposed firing boiler
JP6284345B2 (en) * 2013-11-15 2018-02-28 三菱日立パワーシステムズ株式会社 boiler
JP6203033B2 (en) * 2013-12-17 2017-09-27 三菱日立パワーシステムズ株式会社 boiler

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425855A (en) * 1983-03-04 1984-01-17 Combustion Engineering, Inc. Secondary air control damper arrangement
US4501204A (en) * 1984-05-21 1985-02-26 Combustion Engineering, Inc. Overfire air admission with varying momentum air streams
JPS6370005A (en) * 1986-09-10 1988-03-30 Mitsubishi Heavy Ind Ltd Boiler
US4940004A (en) * 1989-07-07 1990-07-10 J. H. Jansen Company, Inc. High energy combustion air nozzle and method for improving combustion in chemical recovery boilers
US5020454A (en) * 1990-10-31 1991-06-04 Combustion Engineering, Inc. Clustered concentric tangential firing system

Also Published As

Publication number Publication date
FI931941A0 (en) 1993-04-29
FI931941A (en) 1993-04-29
HU9300808D0 (en) 1993-06-28
WO1992008078A1 (en) 1992-05-14
AU646677B2 (en) 1994-03-03
HUT65491A (en) 1994-06-28
EP0554254A1 (en) 1993-08-11
JPH05507345A (en) 1993-10-21
CA2091341C (en) 1995-12-05
AU8108691A (en) 1992-05-26
YU141991A (en) 1995-10-03
JP2731794B2 (en) 1998-03-25
KR970009483B1 (en) 1997-06-13
DE69121579D1 (en) 1996-09-26
ZA915500B (en) 1992-04-29
EP0554254B1 (en) 1996-08-21
KR930702645A (en) 1993-09-09
BR9107060A (en) 1993-09-14
ES2092573T3 (en) 1996-12-01
CS327791A3 (en) 1992-05-13
MX9100537A (en) 1992-06-05

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry