EP0571704B1 - Brûleur pour combustible pulvérulent - Google Patents

Brûleur pour combustible pulvérulent Download PDF

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Publication number
EP0571704B1
EP0571704B1 EP93100713A EP93100713A EP0571704B1 EP 0571704 B1 EP0571704 B1 EP 0571704B1 EP 93100713 A EP93100713 A EP 93100713A EP 93100713 A EP93100713 A EP 93100713A EP 0571704 B1 EP0571704 B1 EP 0571704B1
Authority
EP
European Patent Office
Prior art keywords
air tube
burner
swirl
air
tertiary
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.)
Expired - Lifetime
Application number
EP93100713A
Other languages
German (de)
English (en)
Other versions
EP0571704A3 (fr
EP0571704A2 (fr
Inventor
Eckart Swoboda
Heinz Gräwe
Alfons Leisse
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.)
Hitachi Power Europe GmbH
Original Assignee
Deutsche Babcock Werke Energie und Umwelttechnik AG
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 Deutsche Babcock Werke Energie und Umwelttechnik AG filed Critical Deutsche Babcock Werke Energie und Umwelttechnik AG
Publication of EP0571704A2 publication Critical patent/EP0571704A2/fr
Publication of EP0571704A3 publication Critical patent/EP0571704A3/xx
Application granted granted Critical
Publication of EP0571704B1 publication Critical patent/EP0571704B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • F23C7/004—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus

Definitions

  • the invention relates to a burner for burning dusty fuel with the features of the preamble of patent claim 1.
  • the secondary air and the tertiary air are supplied to the air-guiding ring channels radially from an air box common to several burners.
  • Throttle valves are arranged in the radial inlet connection of the ring channels.
  • the pressure loss is changed by changing the setting of the flat throttle valves located in the secondary air flow, while the swirl intensity and the air volume are set via the throttle valves arranged in the tertiary air flow.
  • the supply of a burner from such an air box common to several burners with combustion air does not allow an individually measurable setting of both a single burner and the individual air flows within the burner with regard to air quantity, air distribution and swirl intensity.
  • a coal dust burner which is provided with two air-guiding ring channels which are supplied with secondary and tertiary air via a radially arranged air line.
  • Each ring channel opens into its own burner throat.
  • Swirl flaps are arranged in the ring channel carrying the secondary air.
  • a coal dust burner is also known (Mitanderen der VGB, issue 50. 1958, page 348), which is provided with a spiral-shaped air inlet housing.
  • the tangential air flow caused in this way creates a continuous transition into the axial air flow, which reduces the pressure loss in the burner and makes the air distribution more uniform.
  • Radial swirl flaps are arranged in the spiral air inlet housing, through which the swirl can be changed. At this Twist adjustment always maintains a residual twist that cannot be canceled.
  • the invention has for its object to design the generic burner so that the number of degrees of freedom for burner optimization to reduce the formation of nitrogen oxides is increased.
  • the burner according to the invention is characterized by an individually controllable individual air supply, in which the secondary air flow and the tertiary air flow are distributed uniformly over the relevant flow cross section via the tangential air flow.
  • the swirl devices in the secondary air pipe and the tertiary air pipe can be individually increased, reduced or eliminated in order to influence the mixing intensity of fuel and combustion air in an inner combustion zone, depending on the fuel to be used, and to have a stable surrounding area around the inner combustion zone To generate flow.
  • the burner which is used to burn coal dust, contains an oil burner ignition lance 2 which is provided in the longitudinal axis 1 of the burner and is arranged within a core air pipe 3.
  • the Oil burner ignition lance 2 carries an oil atomizing nozzle 4 at the front end.
  • a swirl body 5 is arranged in the vicinity of the oil atomizing nozzle 4 within the core air tube 3.
  • the core air tube 3 is surrounded by a primary air tube 6 to form a cylindrical ring channel.
  • the primary air pipe 6 is connected at the rear end via a manifold 7 to a dust line 8, which leads to a mill, not shown.
  • a mixture of primary air or primary gas and coal dust is fed into the primary air pipe 6 via the dust line 8.
  • a swirl insert 9 is arranged at an axial distance from the outlet end, which is attached to the core air pipe 3. This swirl insert 9 sets the stream of primary air or primary gas and coal dust in a rotational flow.
  • internals in the form of a ring 10 are attached, which has a radially inward edge. This edge protrudes into the flow of primary air or primary gas and coal dust.
  • the primary air tube 6 is concentrically surrounded by a secondary air tube 11 to form a cylindrical ring channel and this is in turn concentrically surrounded by a tertiary air tube 12 to form a cylindrical ring channel.
  • the secondary air pipe 11 projects beyond the primary air pipe 6 in the direction of the longitudinal axis 1 of the burner and merges into a section that widens conically outwards, that is, into an inner burner throat 13.
  • the tertiary air tube 12 is also extended in relation to the primary air tube 6 and continues into a conically widening section, that is to say into an outer burner throat 14 which surrounds the inner burner throat 13 at a radial distance.
  • the outer burner throat 14 merges into a burner mouth 15 which is formed in the wall 16 of a combustion chamber, which is constructed from cooled pipes.
  • the inner burner throat 13 can have the same length as the outer burner throat 14 and can also extend to the burner mouth 15. It is also possible that the inner burner throat 13 is shorter and ends at a distance from the burner mouth 15. Of the Inclination angle which the outer burner groove 14 forms with the burner longitudinal axis 1 can correspond to the deviating angle of the inner burner groove 13 or deviate therefrom.
  • both burner throats 13, 14 are cooled and formed by tubes which are bent out of the tubes of the wall 16 of the combustion chamber.
  • the burner throats 13, 14 can also consist of sheet metal jackets which are cooled by air.
  • the secondary air tube 11 and the tertiary air tube 12 of each individual burner are each connected at the rear end to a spiral inlet housing 17, 18, which are connected to control flaps 23, 24 receiving individual air inlet lines 24, 25 and which connect the secondary air tube 11 with secondary air and the tertiary air tube 12 supply with tertiary air as partial flows of the combustion air.
  • Spiral baffles 19 extending in the flow direction of the air are arranged in the inlet housings 17, 18.
  • the inlet housings 17, 18 ensure a uniform air distribution over the ring cross sections of the secondary air pipe 11 and the tertiary air pipe 12.
  • a device for influencing the swirl in the form of a cabinet made of rotatably mounted axial swirl flaps 20, 21 is arranged in the secondary air pipe 11 and the tertiary air pipe 12, which are adjustable from the outside via a linkage (not shown) and an actuator.
  • These axial swirl flaps 20, 21 impose a swirl of adjustable size on the secondary air and the tertiary air.
  • these swirl flaps 20, 21 increase or decrease the swirl of the air flow caused by the inlet housing 17, 18. In special cases, the swirl can also be completely removed.
  • the swirl insert 9 arranged in the primary air pipe 6 generates a rotational flow which results in a uniform flow through the primary air pipe 6.
  • the coal dust is enriched within the mixture flow on the outer circumference of the primary air pipe 6.
  • the coal dust concentration in the edge region is torn open by the ring 10 arranged there, whereby recirculation vortices are generated.
  • These recirculation vortices ensure accelerated heating of the coal dust and sufficient mixing of the coal dust with part of the secondary air.
  • the coal dust concentration at a defined point at the burner mouth 15 causes the occurrence of a very severe lack of air, which is associated with the outgassing phase of the coal dust in terms of location and time.
  • the secondary and tertiary air supplied to the burner individually and in a controllable amount is distributed uniformly over the flow cross section by the spiral inlet housings 17, 18.
  • the swirl that the secondary air has received through the inlet housing 17 is influenced by the swirl flaps 20 arranged immediately before the outlet end of the secondary air pipe 11 in the sense that the swirl intensity can be set between zero and a maximum value. In this way, the swirl intensity can be matched to the coal dust to be burned in such a way that a reliable ignition of the coal dust and a stable initial flame are guaranteed in every application.
  • the swirl flaps 21 vary the swirl intensity of the tertiary air and thus produce a stable flow which is to be adapted to the respective application and which envelops the inner, fuel-rich flame region and thereby causes a temporally and locally delayed oxygen mixing with simultaneous oxygen enrichment of the edge regions of the flame expansion. This way, one predefined burner for the coal dust of any quality created conditions that suppress the formation of nitrogen oxides with optimal combustion behavior.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Feeding And Controlling Fuel (AREA)

Claims (6)

  1. Brûleur pour la combustion d'un combustible pulvérulent à l'aide de l'air de combustion subdivisé en courants partiels concentriques, le brûleur présentant un tube d'air primaire (6) guidant respectivement le gaz primaire et le combustible, ledit tube d'air primaire étant entouré par un tube (11) guidant l'air secondaire et d'un tube (12) guidant l'air tertiaire, le tube d'air secondaire (11) se prolongeant en une section conique (13) et le tube d'air tertiaire (12) se prolongeant en une section conique (14), un appareil générateur de rotation étant disposé dans le tube d'air secondaire (11),
       caractérisé en ce que ce tube (11) et le tube d'air tertiaire (12) sont respectivement reliés à l'aide d'entrées d'air séparées (24, 25), à un carter d'introduction (17, 18) en forme de spirale, en ce que dans les carters (17, 18) sont disposées des tôles de guidage (19), et en ce que tant dans le tube d'air secondaire (11) que dans celui d'air tertiaire (12) se trouvent des dispositifs destinés à amplifier ou diminuer la rotation.
  2. Brûleur selon la revendication 1, caractérisé en ce que les dispositifs disposés dans le tube d'air secondaire (11) et dans le tube d'air tertiaire (12), pour amplifier ou diminuer la rotation, sont constitués de volets axiaux réglables générateurs de rotation (20, 21).
  3. Brûleur selon la revendication 1, caractérisé en ce que le générateur de rotation est constitué d'une garniture fixe génératrice de rotation.
  4. Brûleur selon l'une des revendications 1 à 3, caractérisé en ce qu'à l'intérieur du tube d'air primaire (6) est disposé un tube d'air central (3) recevant une lance d'allumage de brûleur au fuel (2) et en ce qu'à l'intérieur du tube d'air primaire (6) est fixé sur le tube d'air central (3) un générateur de rotation (9).
  5. Brûleur selon l'une des revendications 1 à 4, caractérisé en ce qu'autour de l'extrémité du tube d'air primaire (6) est disposé un anneau (10) ayant une arête orientée radialement vers l'intérieur pénétrant dans le courant constitué de l'air primaire et de la poussière de charbon.
  6. Brûleur selon l'une des revendications 1 à 5, caractérisé en ce que la section conique du tube d'air secondaire (11) est constituée de tubes refroidis.
EP93100713A 1992-05-29 1993-01-19 Brûleur pour combustible pulvérulent Expired - Lifetime EP0571704B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4217879A DE4217879A1 (de) 1992-05-29 1992-05-29 Brenner für staubförmigen Brennstoff
DE4217879 1992-05-29

Publications (3)

Publication Number Publication Date
EP0571704A2 EP0571704A2 (fr) 1993-12-01
EP0571704A3 EP0571704A3 (fr) 1994-02-09
EP0571704B1 true EP0571704B1 (fr) 1996-12-27

Family

ID=6460047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93100713A Expired - Lifetime EP0571704B1 (fr) 1992-05-29 1993-01-19 Brûleur pour combustible pulvérulent

Country Status (6)

Country Link
EP (1) EP0571704B1 (fr)
AT (1) ATE146868T1 (fr)
DE (2) DE4217879A1 (fr)
DK (1) DK0571704T3 (fr)
ES (1) ES2096112T3 (fr)
FI (1) FI98555C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG118428A1 (en) * 2004-07-01 2006-01-27 Air Prod & Chem Staged combustion system with ignition-assisted fuel lances
EP1741977A1 (fr) * 2005-07-07 2007-01-10 Hitachi Power Europe GmbH Brûleur à charbon pulvérisé pour émissions réduites de NOx
DE102006022657A1 (de) * 2006-05-12 2007-11-22 Alstom Technology Ltd. Verfahren und Anordnung zur Luftmengen-Regelung eines mit fossilen, festen Brennstoffen betriebenen Verbrennungssystems
CN101363625B (zh) * 2008-09-26 2010-06-02 哈尔滨工业大学 一种大速比中心给粉旋流煤粉燃烧器

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4435640C2 (de) * 1994-10-06 2001-01-04 Steinmueller Gmbh L & C Brenner zur Verbrennung von staubförmigem Brennstoff
CA2162244C (fr) * 1994-11-14 1999-04-27 Hideaki Oota Bruleur a combustion de charbon pulverise
DE19527083A1 (de) * 1995-07-25 1997-01-30 Lentjes Kraftwerkstechnik Verfahren und Brenner zur Verminderung der Bildung von NO¶x¶ bei der Verbrennung von Kohlenstaub
EP0836049B1 (fr) * 1996-10-08 2001-12-12 Ansaldo Caldaie S.P.A. Tuyère d'injection de charbon pulvérisé
CN1095971C (zh) * 1996-11-12 2002-12-11 孙键 径向大粒度差旋流煤粉燃烧器
DK175606B1 (da) * 1999-08-06 2004-12-27 Burmeister & Wains As Brænder
DE19942769A1 (de) * 1999-09-08 2001-03-15 Bbp Energy Gmbh Kohlenstaubbrenner
CN1920382B (zh) * 2006-09-04 2011-07-20 东方锅炉（集团）股份有限公司 一种旋流粉煤燃烧器
DE102007025051B4 (de) * 2007-05-29 2011-06-01 Hitachi Power Europe Gmbh Hüttengasbrenner
CN102078950A (zh) * 2010-04-17 2011-06-01 周士友 用于离心铸造超长薄壁细管的智能加热系统
DE102011018697A1 (de) 2011-04-26 2012-10-31 Babcock Borsig Steinmüller Gmbh Brenner für partikelförmigen Brennstoff
CN102767824B (zh) * 2012-07-06 2015-08-05 南阳市沧田工程机械有限公司 一种新型高效煤粉燃烧装置
CN103672880A (zh) * 2013-09-16 2014-03-26 北京神雾环境能源科技集团股份有限公司 粉料燃烧器
DE102015111585A1 (de) 2015-07-16 2017-01-19 Mitsubishi Hitachi Power Systems Europe Gmbh Kohlenstaubbrenner mit einstückiger, elektrisch beheizter Brennstoffdüse
DE102015111587A1 (de) 2015-07-16 2017-01-19 Mitsubishi Hitachi Power Systems Europe Gmbh Brenner und Verfahren für eine Zündfeuerung mit staubförmigem Brennstoff
DE102015111586A1 (de) 2015-07-16 2017-01-19 Mitsubishi Hitachi Power Systems Europe Gmbh Kohlenstaubbrenner mit elektrisch beheizter Brennstoffdüse
CN105402723B (zh) * 2015-12-14 2017-12-22 河北省电力建设调整试验所 一种适于低阶混煤燃烧的燃煤电厂旋流燃烧器
CN105927977A (zh) * 2016-06-28 2016-09-07 山东圣威新能源有限公司 一种新型微煤脱硫低氮涡轮燃烧器
EP3717832B1 (fr) * 2017-11-29 2022-01-12 Wärtsilä Moss AS Ensemble brûleur à double carburant et procédé de fonctionnement d'un ensemble brûleur à double carburant
CN112762448B (zh) * 2021-02-01 2022-04-22 西安交通大学 一种耦合分级旋流分散燃烧技术的低NOx燃气燃烧器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3131962C2 (de) * 1981-08-13 1985-07-25 Steag Ag, 4300 Essen Leistungsbrenner für staubförmige Brennstoffe
FR2581444B1 (fr) * 1985-05-03 1988-11-10 Charbonnages De France Procede pour la combustion de combustibles fluides et bruleur a turbulence adapte a sa mise en oeuvre
EP0445938B1 (fr) * 1990-03-07 1996-06-26 Hitachi, Ltd. Brûleur à charbon pulvérisé, chaudière au charbon pulvérisé et procédé pour la combustion de charbon pulvérisé
CA2093316C (fr) * 1990-10-05 2002-12-03 Janos M. Beer Systeme de combustion pour la reduction des oxydes d'azote

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG118428A1 (en) * 2004-07-01 2006-01-27 Air Prod & Chem Staged combustion system with ignition-assisted fuel lances
US7303388B2 (en) 2004-07-01 2007-12-04 Air Products And Chemicals, Inc. Staged combustion system with ignition-assisted fuel lances
EP1741977A1 (fr) * 2005-07-07 2007-01-10 Hitachi Power Europe GmbH Brûleur à charbon pulvérisé pour émissions réduites de NOx
DE102005032109B4 (de) * 2005-07-07 2009-08-06 Hitachi Power Europe Gmbh Kohlenstaubbrenner für niedrige NOx-Emissionen
DE102006022657A1 (de) * 2006-05-12 2007-11-22 Alstom Technology Ltd. Verfahren und Anordnung zur Luftmengen-Regelung eines mit fossilen, festen Brennstoffen betriebenen Verbrennungssystems
DE102006022657B4 (de) * 2006-05-12 2011-03-03 Alstom Technology Ltd. Verfahren und Anordnung zur Luftmengen-Regelung eines mit fossilen, festen Brennstoffen betriebenen Verbrennungssystems
CN101363625B (zh) * 2008-09-26 2010-06-02 哈尔滨工业大学 一种大速比中心给粉旋流煤粉燃烧器

Also Published As

Publication number Publication date
DE59304859D1 (de) 1997-02-06
EP0571704A3 (fr) 1994-02-09
FI932236A (fi) 1993-11-30
FI932236A0 (fi) 1993-05-17
ES2096112T3 (es) 1997-03-01
FI98555B (fi) 1997-03-27
ATE146868T1 (de) 1997-01-15
FI98555C (fi) 1997-07-10
DK0571704T3 (da) 1997-05-12
DE4217879A1 (de) 1993-12-02
EP0571704A2 (fr) 1993-12-01

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