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WO2009154665A2 - Injecteur de combustible pour four à faible teneur en no<sb>x</sb> - Google Patents

Injecteur de combustible pour four à faible teneur en no<sb>x</sb> Download PDF

Info

Publication number
WO2009154665A2
WO2009154665A2 PCT/US2009/002456 US2009002456W WO2009154665A2 WO 2009154665 A2 WO2009154665 A2 WO 2009154665A2 US 2009002456 W US2009002456 W US 2009002456W WO 2009154665 A2 WO2009154665 A2 WO 2009154665A2
Authority
WO
WIPO (PCT)
Prior art keywords
stream
passageway
fuel
fuel injector
injector
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.)
Ceased
Application number
PCT/US2009/002456
Other languages
English (en)
Other versions
WO2009154665A3 (fr
Inventor
Joel Vatsky
Jiefeng Shan
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.)
Siemens Energy Inc
Original Assignee
Siemens Energy Inc
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 Siemens Energy Inc filed Critical Siemens Energy Inc
Priority to CN200980119585.6A priority Critical patent/CN102047041B/zh
Priority to AU2009260867A priority patent/AU2009260867B2/en
Priority to KR1020107029454A priority patent/KR101366032B1/ko
Priority to EP09766979A priority patent/EP2318763A2/fr
Priority to JP2011511589A priority patent/JP5409779B2/ja
Publication of WO2009154665A2 publication Critical patent/WO2009154665A2/fr
Publication of WO2009154665A3 publication Critical patent/WO2009154665A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • a secondary stream of air is mixed with the primary air and coal stream at the exit of the fuel injector to expand the NO x reducing zone, such that NO x occurring within the combustion zone can be decreased.
  • the secondary air stream is supplied at the exit of the fuel injector at the central portion of the fuel flow entering the combustion zone, a region of combustion air is created at the central portion of the combustion zone. This region of combustion air creates an internal interface between the primary air/coal stream and the central, secondary stream air stream, thereby forming a high stoichiometric flame surface within the volume of the flame, such that only a small portion of the primary air/coal stream is affected.
  • FIG. 1 is a sectional view of an exemplary- embodiment of a fuel injector for a pulverized coal furnace, in accordance with the present invention.
  • the fuel injector 10 includes an elongated housing 11 having an inlet end 12 and an outlet end 14.
  • the materials of which the fuel injector 10 can be made are conventional and may include various materials capable of withstanding extreme heat, such as iron, various other metals such as carbon steel and stainless steel, ceramic and the like.
  • the housing 11 includes an elongated annular wall 16 extending from the inlet end 12 to an outwardly tapering annular wall 18.
  • the housing 11 includes an elongated annular wall 20 extending between the outlet end 14 and end 19 of the wall 18, which opposes the outlet end 14 of the fuel injector 10.
  • the portions of the injector 10 defined by the walls 16, 18 and 20 are referred to below, respectively, as the entry region 22, the transition region 24 and the nozzle region 26.
  • the secondary stream increases the oxygen concentration and heats the primary stream within the injector 10 to create an increased stoichiometry in the primary stream on and around the central axis A of the passageway 28, which in turn increases the stoichiometry of the fuel stream on and around the burner axis within the combustion zone 30.
  • the resultant fuel/air mixture on and around the burner axis will more easily gasify or combust once sufficient energy is supplied to initiate the combustion process.
  • a further benefit is a shorter flame length.
  • the taper and the diameters are selected to maintain the speed of the primary stream constant throughout the passageway 28, or alternatively obtain a selected speed for the fuel stream exiting at the outlet end 14 of the injector 10 which is different than the speed of the primary stream entering at the inlet end 12 of the injector 10.
  • the secondary stream is supplied to the injector 110 through the aperture 132, and then flows from the aperture 132 through the hollow tube 154 and into the interior 150 of the distributor 140.
  • the conical shape of the interior 150 directs the secondary stream substantially on and around the central axis A of the passageway 28.
  • the secondary stream upon exiting the interior 150, interacts with and heats the primary stream, which the distributor 140 has diverted in a manner similar to that described above for the cone 40 of the injector 10, beginning in the entry region 22, and then in the transition and the nozzle regions 24, 26 of the injector 10.
  • the secondary stream flows through the tube 154, into the distributor 240 through the aperture 241 and then exits from the interior 150 of the distributor 240 into the passageway 28 in the entry region 22.
  • the conical shape of the interior 150 directs the secondary stream substantially along and surrounding the central axis A of the passageway 28.
  • the secondary stream upon exiting the interior 150 of the distributor 240, interacts with and heats a portion of the primary stream flowing along and around the central axis of the passageway 28 as the primary stream flows from the entry region into the transition region 24 and then into the nozzle region 26 of the injector 10.

Landscapes

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

Abstract

L'invention concerne un injecteur de combustible destiné à être utilisé dans un four, qui provoque le mélange d'un courant primaire d'un gaz porteur et de combustible avec de l'air chauffé, de l'oxygène ou un mélange d'oxygène et de CO2 ou d'un gaz de combustion en recirculation, à l'intérieur de l'injecteur, par un courant secondaire d'air chauffé, avant que le courant primaire ne sorte de l'injecteur en tant que courant de combustible et s'écoule dans une zone de combustion du four. L'interaction du courant primaire avec l'air chauffé du courant secondaire augmente la stœchiométrie au centre du courant de combustible sortant de l'injecteur, ce qui réduit le dégagement de NOx et augmente la combustion du combustible dans le four.
PCT/US2009/002456 2008-05-28 2009-04-21 Injecteur de combustible pour four à faible teneur en no<sb>x</sb> Ceased WO2009154665A2 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN200980119585.6A CN102047041B (zh) 2008-05-28 2009-04-21 用于低NOx炉的燃料喷射器
AU2009260867A AU2009260867B2 (en) 2008-05-28 2009-04-21 Fuel injector for low NOx furnace
KR1020107029454A KR101366032B1 (ko) 2008-05-28 2009-04-21 낮은 질소 산화물 노용 연료 분사기
EP09766979A EP2318763A2 (fr) 2008-05-28 2009-04-21 Injecteur de combustible pour four à faible teneur en nox
JP2011511589A JP5409779B2 (ja) 2008-05-28 2009-04-21 低窒素酸化物炉用燃料噴射器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/154,972 2008-05-28
US12/154,972 US20090297996A1 (en) 2008-05-28 2008-05-28 Fuel injector for low NOx furnace

Publications (2)

Publication Number Publication Date
WO2009154665A2 true WO2009154665A2 (fr) 2009-12-23
WO2009154665A3 WO2009154665A3 (fr) 2010-06-10

Family

ID=41217683

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/002456 Ceased WO2009154665A2 (fr) 2008-05-28 2009-04-21 Injecteur de combustible pour four à faible teneur en no<sb>x</sb>

Country Status (7)

Country Link
US (1) US20090297996A1 (fr)
EP (1) EP2318763A2 (fr)
JP (1) JP5409779B2 (fr)
KR (1) KR101366032B1 (fr)
CN (1) CN102047041B (fr)
AU (1) AU2009260867B2 (fr)
WO (1) WO2009154665A2 (fr)

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US9010083B2 (en) 2011-02-03 2015-04-21 General Electric Company Apparatus for mixing fuel in a gas turbine
RU2011115528A (ru) 2011-04-21 2012-10-27 Дженерал Электрик Компани (US) Топливная форсунка, камера сгорания и способ работы камеры сгорания
US9506654B2 (en) 2011-08-19 2016-11-29 General Electric Company System and method for reducing combustion dynamics in a combustor
US8984887B2 (en) 2011-09-25 2015-03-24 General Electric Company Combustor and method for supplying fuel to a combustor
US8801428B2 (en) 2011-10-04 2014-08-12 General Electric Company Combustor and method for supplying fuel to a combustor
US8550809B2 (en) 2011-10-20 2013-10-08 General Electric Company Combustor and method for conditioning flow through a combustor
US9188335B2 (en) 2011-10-26 2015-11-17 General Electric Company System and method for reducing combustion dynamics and NOx in a combustor
US9033699B2 (en) 2011-11-11 2015-05-19 General Electric Company Combustor
US9004912B2 (en) 2011-11-11 2015-04-14 General Electric Company Combustor and method for supplying fuel to a combustor
US8894407B2 (en) 2011-11-11 2014-11-25 General Electric Company Combustor and method for supplying fuel to a combustor
US9322557B2 (en) 2012-01-05 2016-04-26 General Electric Company Combustor and method for distributing fuel in the combustor
US9052112B2 (en) 2012-02-27 2015-06-09 General Electric Company Combustor and method for purging a combustor
US8511086B1 (en) 2012-03-01 2013-08-20 General Electric Company System and method for reducing combustion dynamics in a combustor
US9121612B2 (en) 2012-03-01 2015-09-01 General Electric Company System and method for reducing combustion dynamics in a combustor
US9249734B2 (en) 2012-07-10 2016-02-02 General Electric Company Combustor
US8904798B2 (en) 2012-07-31 2014-12-09 General Electric Company Combustor
US9353950B2 (en) 2012-12-10 2016-05-31 General Electric Company System for reducing combustion dynamics and NOx in a combustor
US9273868B2 (en) 2013-08-06 2016-03-01 General Electric Company System for supporting bundled tube segments within a combustor
WO2015034493A1 (fr) 2013-09-05 2015-03-12 Honeywell International Inc. Brûleur à combustible–oxygène pulvérisé
BE1023010B1 (fr) * 2015-10-06 2016-11-04 Lhoist Recherche Et Developpement Sa Procédé de calcination de roche minérale dans un four droit vertical à flux parallèles régénératif et four mis en oeuvre
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CN107246607B (zh) * 2017-07-06 2023-05-30 山西大学 一种用于四角切圆锅炉的自动稳燃系统
CN107228356B (zh) * 2017-07-06 2023-05-30 山西大学 一种用于对冲锅炉的自动稳燃系统
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Also Published As

Publication number Publication date
KR20110030495A (ko) 2011-03-23
JP2011523013A (ja) 2011-08-04
JP5409779B2 (ja) 2014-02-05
WO2009154665A3 (fr) 2010-06-10
EP2318763A2 (fr) 2011-05-11
AU2009260867B2 (en) 2013-03-14
KR101366032B1 (ko) 2014-02-21
US20090297996A1 (en) 2009-12-03
AU2009260867A1 (en) 2009-12-23
CN102047041B (zh) 2013-09-25
CN102047041A (zh) 2011-05-04

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