CA2508380A1 - Re-oriented over fire air ports for reduction of nox production from pulverized coal-fired burners - Google Patents

Re-oriented over fire air ports for reduction of nox production from pulverized coal-fired burners Download PDF

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Publication number
CA2508380A1
CA2508380A1 CA 2508380 CA2508380A CA2508380A1 CA 2508380 A1 CA2508380 A1 CA 2508380A1 CA 2508380 CA2508380 CA 2508380 CA 2508380 A CA2508380 A CA 2508380A CA 2508380 A1 CA2508380 A1 CA 2508380A1
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CA
Canada
Prior art keywords
ofa
fire air
over fire
pulverized coal
reduction
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
CA 2508380
Other languages
French (fr)
Other versions
CA2508380C (en
Inventor
Albert D. Larue
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.)
Babcock and Wilcox Power Generation Group Inc
Original Assignee
Babcock and Wilcox Co
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 and Wilcox Co filed Critical Babcock and Wilcox Co
Priority to CA 2508380 priority Critical patent/CA2508380C/en
Publication of CA2508380A1 publication Critical patent/CA2508380A1/en
Application granted granted Critical
Publication of CA2508380C publication Critical patent/CA2508380C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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)

Abstract

An over fire air (OFA) port arrangement for a pulverized coal-fired boiler or furnace has at least one OFA port through each of the sidewalls for injecting OFA to increase residence time for each burner level. Plural OFA ports may be employed, staggered both vertically and horizontally to effectively deliver over fire air to the burner flames at the appropriate time and location to most efficiently reduce the formation of fuel NO x. OFA port configurations for both single-wall and opposed- wall fired furnaces and boilers are provided.
CA 2508380 2005-05-26 2005-05-26 Re-oriented over fire air ports for reduction of nox production from pulverized coal-fired burners Expired - Fee Related CA2508380C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2508380 CA2508380C (en) 2005-05-26 2005-05-26 Re-oriented over fire air ports for reduction of nox production from pulverized coal-fired burners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2508380 CA2508380C (en) 2005-05-26 2005-05-26 Re-oriented over fire air ports for reduction of nox production from pulverized coal-fired burners

Publications (2)

Publication Number Publication Date
CA2508380A1 true CA2508380A1 (en) 2006-11-26
CA2508380C CA2508380C (en) 2009-10-27

Family

ID=37480328

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2508380 Expired - Fee Related CA2508380C (en) 2005-05-26 2005-05-26 Re-oriented over fire air ports for reduction of nox production from pulverized coal-fired burners

Country Status (1)

Country Link
CA (1) CA2508380C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103712204A (en) * 2013-12-13 2014-04-09 山西蓝天环保设备有限公司 Wall type arrangement direct-current pulverized coal combustion technology used for industrial pulverized coal boiler
WO2018002441A1 (en) * 2016-07-01 2018-01-04 Teknologian Tutkimuskeskus Vtt Oy Over fire arrangement and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103712204A (en) * 2013-12-13 2014-04-09 山西蓝天环保设备有限公司 Wall type arrangement direct-current pulverized coal combustion technology used for industrial pulverized coal boiler
CN103712204B (en) * 2013-12-13 2016-05-11 山西蓝天环保设备有限公司 A kind of wall formula for industrial coal powder boiler is arranged direct-flow pulverized coal combustion device
WO2018002441A1 (en) * 2016-07-01 2018-01-04 Teknologian Tutkimuskeskus Vtt Oy Over fire arrangement and method
US10982843B2 (en) 2016-07-01 2021-04-20 Teknologian Tutkimuskeskus Vtt Oy Over fire arrangement and method

Also Published As

Publication number Publication date
CA2508380C (en) 2009-10-27

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20180528