EP0636836B1 - Brûleur pour la combustion d'un combustible pulvérulent - Google Patents

Brûleur pour la combustion d'un combustible pulvérulent Download PDF

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Publication number
EP0636836B1
EP0636836B1 EP94100539A EP94100539A EP0636836B1 EP 0636836 B1 EP0636836 B1 EP 0636836B1 EP 94100539 A EP94100539 A EP 94100539A EP 94100539 A EP94100539 A EP 94100539A EP 0636836 B1 EP0636836 B1 EP 0636836B1
Authority
EP
European Patent Office
Prior art keywords
air pipe
primary
burner
burner according
primary air
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
EP94100539A
Other languages
German (de)
English (en)
Other versions
EP0636836A3 (fr
EP0636836A2 (fr
Inventor
Alfons Leisse
Michael Streffing
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
Babcock Kraftwerkstechnik GmbH
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 Kraftwerkstechnik GmbH filed Critical Babcock Kraftwerkstechnik GmbH
Publication of EP0636836A2 publication Critical patent/EP0636836A2/fr
Publication of EP0636836A3 publication Critical patent/EP0636836A3/fr
Application granted granted Critical
Publication of EP0636836B1 publication Critical patent/EP0636836B1/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
    • 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 Claim 1.
  • a burner is known from NL-C-100 711.
  • the invention has for its object the generic To design burners so that a more effective and controllable influence on the combustion process is made possible, which is primarily based on the chemical-physical Relationships between nitrogen oxide formation and reduction in the primary combustion zone is aligned.
  • the one between the flow control device and the primary air pipe A defined, defined annular gap enables a partial flow the secondary air, in the ignition area of the flame core to get involved. In this way, an early ignition of the dusty fuel in the oxygen deficiency zone supported.
  • the flow guide thus causes on the one hand a stabilization of the ignition on the burner and in addition, an extent limited in the radial direction the flame.
  • the flow control device acts air-repellent and thereby delays the mixing reaction between the oxygen in the combustion air and the fuel products. All of this reduces the formation of nitrogen oxide.
  • the partial flow of secondary air flowing through the annular gap can in an advantageous embodiment of the invention using the movable throttle ring can be changed. This can do that different ignition behavior of different fuels can be influenced within a wide range.
  • FIG. 1 An embodiment of the invention is in the drawing shown and is explained in more detail below.
  • the drawing shows the longitudinal section through a burner.
  • the burner which is used to burn coal dust, contains an oil burner ignition lance provided in the burner longitudinal axis 1 2, which is arranged within a core air tube 3.
  • the Oil burner ignition lance 2 carries one at the front end Oil atomizer nozzle 4.
  • a swirl body 5 is arranged within the core air tube 3.
  • the core air tube 3 is cylindrical to form Ring channel surrounded by a primary air tube 6.
  • the Primary air tube 6 is at the rear end via an elbow 7 connected to a dust line 8, which is not a shown mill leads.
  • a mixture is created via the dust line 8 from primary air or primary gas and coal dust into the Primary air pipe 6 fed.
  • In the primary air pipe 6 is in an axial distance from the exit end Swirl insert 9 arranged with a displacement body 10 connected is.
  • the displacement body 10 is on the Core air tube 3 attached.
  • the primary air tube 6 is concentric to form a cylindrical ring channel from a secondary air tube 12 and this in turn forms a cylindrical ring channel surrounded concentrically by a tertiary air tube 13.
  • a tertiary air tube 13 To the Tertiary air tube 13 is connected to a burner throat 14 into a burner mouth 15 in the wall 16 of a combustion chamber transforms.
  • the burner throat 14 is formed from the tubes which the wall 16 of the furnace is constructed.
  • the secondary air tube 12 and the tertiary air tube 13 each individual burners are at the rear end with a spiral inlet housing 17, 18 connected to the Butterfly valves 19, 20 receiving individual air inlet lines 21, 22 are connected.
  • the individual air inlet lines 21, 22 supply the secondary air pipe 12 with secondary air and that Tertiary air tube 13 with tertiary air as partial flows of Combustion air.
  • the secondary air tube 12 and the tertiary air tube 13 is a facility for each immediately before the exit end Influencing the twist in the form of a cupboard made rotatable mounted axial swirl flaps 23, 24 arranged over a Linkage not shown and an actuator from the outside are adjustable. Through these axial swirl flaps 23, 24 the secondary air and the tertiary air a swirl of adjustable Size imposed. In a burner in which only Coal dust of constant composition and quality a fixed set can also be burned Swirl apparatus with a defined swirl intensity can be used.
  • the primary air pipe 6 is under formation an annular gap 25 from a flow guide device 26 surround.
  • the width of the annular gap 25 is greater than or equal to 1.5% of the outside diameter of the primary air pipe 6.
  • the Flow direction consists of a cylindrical sleeve and is on the upstream side with an upstream segment 27 and provided on the outflow side with an outflow segment 28.
  • the Inflow segment 27 forms one with the burner longitudinal axis Inflow angle of maximum 45 °
  • the outflow segment 28 forms with the burner longitudinal axis an outflow angle of maximum 25 °.
  • At least the inflow segment 27 and the cylindrical middle part the flow guide 26 are within the Secondary air pipe 12.
  • the flow guide 26 divides the secondary air flowing through the secondary air pipe 12 in two Partial flows, one of which flows through the annular gap 25.
  • the flow guiding device 26 is open via support segments 29 the primary air pipe 6 centered.
  • the support segments 29 can run parallel to the burner longitudinal axis 1, or preferably be made at an angle to the longitudinal axis of the burner. This Angle is 0 ° to 80 °, preferably 45 °.
  • This Angle is 0 ° to 80 °, preferably 45 °.
  • a throttle ring 30 axially into the Inlet opening of the flow guide 26 is slidable arranged. By closing or releasing the Annular gap 25 with the help of the throttle ring 30 can the shares the partial flows of the secondary air vary and thus the Secondary air flow can be influenced in the Fuel products are mixed during their pyrolysis.
  • the flow guide device 26 projects beyond the primary air pipe 6 and this in turn the tertiary air tube 13 in the axial direction. That part of the primary air pipe 6 which projects beyond Flow guide 26 makes up 25% of the outside diameter of the Primary air tube 6 out.
  • the outlet cross sections of the Tertiary air tube 13, the secondary air tube 12 and the Flow guide device 26 are in a fixed Relationship to each other by the procedural Design of the burner is affected. In the best case lie the outer edges of the tertiary air tube 13, the Secondary air tube 12 and the flow guide 26 a circular conical surface, the tip 31 in the direction of flow points.
  • the central angle of the circular cone surface is 40 ° to 60 °.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Claims (12)

  1. Brûleur pour combustible pulvérulent, avec air de combustion subdivisé en courants partiels concentriques, le brûleur comprenant un tube (6) assurant le guidage d'air primaire, de gaz primaire et de combustible, le tube d'air primaire (6) étant entouré d'une part par un tube (12) assurant le guidage d'air secondaire, et d'autre part à l'extrémité située côté sortie de ce dernier tube (12), par un dispositif de guidage d'écoulement (26) ouvert des deux côtés, avec formation d'un interstice annulaire (25), ledit dispositif traversé par un écoulement d'air secondaire situé à une certaine distance du tube d'air primaire (6), le long de son axe, caractérisé en ce que la valeur de cette distance correspond jusqu'à 25 % du diamètre extérieur du tube d'air primaire (6), en ce que la largeur de l'interstice annulaire (25) est au moins égale à 1,5 % du diamètre extérieur du tube d'air primaire (6), et en ce que, sur le tube d'air primaire (6), est disposé un anneau d'étranglement (30) susceptible de se déplacer axialement jusque dans la section transversale d'entrée du dispositif de guidage d'écoulement (26).
  2. Brûleur selon la revendication 1, caractérisé en ce que le dispositif de guidage d'écoulement (26) est soutenu sur le tube d'air primaire(6) par l'intermédiaire de segments d'appui (29) qui sont disposés sous un angle maximal de 80° dans la direction de l'écoulement de l'air secondaire.
  3. Brûleur selon l'une des revendications 1 ou 2, caractérisé en ce que le dispositif de guidage d'écoulement (26) est pourvu d'un segment de fuite d'écoulement (28) formant, avec l'axe longitudinal (1) du brûleur, un angle de fuite maximal de 25°.
  4. Brûleur selon l'une des revendications 1 à 3, caractérisé en ce que le dispositif de guidage d'écoulement (26) est pourvu d'un segment d'attaque d'écoulement (27), formant avec l'axe longitudinal (1) du brûleur un angle d'attaque maximal de 45°.
  5. Brûleur selon l'une des revendications 1 à 4, caractérisé en ce qu'un caisson à clapet de rotation est disposé dans le tube d'air secondaire (12), en amont du dispositif de guidage d'écoulement (26).
  6. Brûleur selon la revendication 5, caractérisé en ce que le caisson à clapet de rotation est réglable.
  7. Brûleur selon l'une des revendications 1 à 6, caractérisé en ce qu'à l'intérieur du tube d'air primaire (66) est disposé un tube d'air central (3) recevant une lance de brûleur à allumage au fioul (2), et en ce qu'à l'intérieur du tube d'air primaire (6) est disposée une garniture à rotation (9) fixe ou réglable, reliée à un corps de refoulement (10) fixé sur le tube d'air central (3).
  8. Brûleur selon l'une des revendications 1 à 7, caractérisé en ce que, à l'extrémité située côté sortie du tube d'air primaire (6), est prévu un dispositif de rupture de la concentration en poussière, dans la zone de bordure du tube d'air primaire (6).
  9. Brûleur selon l'une des revendications 1 à 8, caractérisé en ce que le tube d'air secondaire (12) est entouré par un tube d'air tertiaire (13) assurant le guidage d'air tertiaire et en ce que le tube d'air secondaire (12) dépasse en direction axiale le tube d'air tertiaire (13).
  10. Brûleur selon la revendication 9, caractérisé en ce qu'un corps de rotation fixe ou réglable est disposé dans le tube d'air tertiaire (13).
  11. Brûleur selon l'une des revendications 1 à 10, caractérisé en ce que le dispositif de guidage d'écoulement (26) dépasse en direction axiale le tube d'air secondaire (12).
  12. Brûleur selon les revendications 8 et 11, caractérisé en ce que les arêtes extérieures du tube d'air tertiaire (13), du tube d'air secondaire (12) et du dispositif de guidage d'écoulement (26) sont situées sur une surface conique à section circulaire, dont la pointe (31) est tournée dans la direction de l'écoulement et dont l'angle par rapport a son axe est compris dans une plage de 40° à 60°.
EP94100539A 1993-07-30 1994-01-15 Brûleur pour la combustion d'un combustible pulvérulent Expired - Lifetime EP0636836B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4325643A DE4325643A1 (de) 1993-07-30 1993-07-30 Brenner zum Verbrennen von staubförmigem Brennstoff
DE4325643 1993-07-30

Publications (3)

Publication Number Publication Date
EP0636836A2 EP0636836A2 (fr) 1995-02-01
EP0636836A3 EP0636836A3 (fr) 1995-08-09
EP0636836B1 true EP0636836B1 (fr) 1998-07-29

Family

ID=6494104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94100539A Expired - Lifetime EP0636836B1 (fr) 1993-07-30 1994-01-15 Brûleur pour la combustion d'un combustible pulvérulent

Country Status (9)

Country Link
US (1) US5651320A (fr)
EP (1) EP0636836B1 (fr)
CN (1) CN1074825C (fr)
AT (1) ATE169101T1 (fr)
DE (2) DE4325643A1 (fr)
DK (1) DK0636836T3 (fr)
ES (1) ES2119910T3 (fr)
FI (1) FI104125B1 (fr)
ZA (1) ZA941358B (fr)

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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
US6145450A (en) * 1996-02-06 2000-11-14 Foster Wheeler Corporation Burner assembly with air stabilizer vane
GB9612479D0 (en) * 1996-06-14 1996-08-14 Mitsui Babcock Energy Limited Fluent fuel fired burner
DK0836049T3 (da) * 1996-10-08 2002-04-08 Enel Spa Injektionsdyse til pulveriseret kul
US5829369A (en) * 1996-11-12 1998-11-03 The Babcock & Wilcox Company Pulverized coal burner
CN1095971C (zh) * 1996-11-12 2002-12-11 孙键 径向大粒度差旋流煤粉燃烧器
DE19854390C2 (de) * 1998-11-25 2001-10-31 Messer Griesheim Gmbh Vorrichtung und Verfahren zur Perliteherstellung
DK175606B1 (da) * 1999-08-06 2004-12-27 Burmeister & Wains As Brænder
US6347937B1 (en) * 2000-01-21 2002-02-19 Ats Spartec Inc. Rotary kiln burner
FR2851032B1 (fr) * 2003-02-06 2005-11-11 Pillard Chauffage Perfectionnement au bruleur comportant un stabilisateur de flamme et au moins deux conduits d'air primaire, axial et en rotation, concentriques autour d'au moins une alimentation en combustible
AU2005229668B2 (en) * 2004-11-04 2008-03-06 Babcock-Hitachi K.K. Overfiring air port, method for manufacturing air port, boiler, boiler facility, method for operating boiler facility and method for improving boiler facility
FR2887597B1 (fr) * 2005-06-27 2010-04-30 Egci Pillard Conduite annulaire et bruleur comportant une telle conduite
US7430970B2 (en) * 2005-06-30 2008-10-07 Larue Albert D Burner with center air jet
DE102005046831A1 (de) * 2005-09-29 2007-04-12 Küppersbusch Großküchentechnik GmbH Staubfeuerungsvorrichtung
CN200940831Y (zh) * 2006-05-17 2007-08-29 杭州意能电力技术有限公司 一种带隔板的煤粉燃烧器
US8113824B2 (en) * 2006-06-01 2012-02-14 Babcock & Wilcox Power Generation Group, Inc. Large diameter mid-zone air separation cone for expanding IRZ
ES2636594T3 (es) * 2006-08-16 2017-10-06 The Babcock & Wilcox Company Quemador de chorro de aire central
AU2006203560B2 (en) * 2006-08-17 2011-12-01 The Babcock & Wilcox Company Burner with center air jet
RU2433342C2 (ru) * 2006-08-23 2011-11-10 Те Бабкок Энд Вилкокс Компани ГОРЕЛКА С ЦЕНТРАЛЬНОЙ ВОЗДУШНОЙ СТРУЕЙ И СПОСОБ УМЕНЬШЕНИЯ ВЫБРОСОВ NOx УКАЗАННОЙ ГОРЕЛКИ (ВАРИАНТЫ)
WO2010034124A1 (fr) * 2008-09-29 2010-04-01 New Brunswick Power Generation Corporation Système et procédé pour brûler du combustible
US20100275824A1 (en) * 2009-04-29 2010-11-04 Larue Albert D Biomass center air jet burner
CN101644431B (zh) * 2009-08-31 2011-02-02 中国计量学院 具有自稳能力的三级配风低NOx煤粉燃烧器
CN102086415B (zh) * 2009-12-03 2014-08-20 通用电气公司 进料装置及进料方法
CN101865462B (zh) * 2010-06-09 2012-01-18 清华大学 一种弱旋一次风多级分离旋流燃烧器
WO2012069534A1 (fr) * 2010-11-26 2012-05-31 Bekaert Combustion Technology B.V. Brûleur doté d'éléments d'écoulement axial secondaires
DE102011018697A1 (de) * 2011-04-26 2012-10-31 Babcock Borsig Steinmüller Gmbh Brenner für partikelförmigen Brennstoff
CN102269404A (zh) * 2011-06-30 2011-12-07 哈尔滨工业大学 一种多通道旋流煤粉燃烧器
US20140157790A1 (en) * 2012-12-10 2014-06-12 Zilkha Biomass Power Llc Combustor assembly and methods of using same
CN103411215B (zh) * 2013-08-26 2016-01-27 中节环立为（武汉）能源技术有限公司 多向射流式旋流煤粉燃烧器
JP6632226B2 (ja) * 2015-06-12 2020-01-22 三菱日立パワーシステムズ株式会社 バーナ、燃焼装置、ボイラ及びバーナの制御方法
DE102015111586A1 (de) 2015-07-16 2017-01-19 Mitsubishi Hitachi Power Systems Europe Gmbh Kohlenstaubbrenner mit 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
DE102015111585A1 (de) 2015-07-16 2017-01-19 Mitsubishi Hitachi Power Systems Europe Gmbh Kohlenstaubbrenner mit einstückiger, elektrisch beheizter Brennstoffdüse
EP3267104B1 (fr) 2016-07-08 2020-05-20 Steinmüller Engineering GmbH Brûleur et procédé d'optimisation de la combustion de combustibles particulaires gros, en particulier de la biomasse

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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
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JP2526236B2 (ja) * 1987-02-27 1996-08-21 バブコツク日立株式会社 超低ＮＯｘ燃焼装置
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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
US5113771A (en) * 1991-08-14 1992-05-19 The United States Of America As Represented By The United States Department Of Energy Pulverized coal fuel injector

Also Published As

Publication number Publication date
ATE169101T1 (de) 1998-08-15
CN1074825C (zh) 2001-11-14
FI941806A0 (fi) 1994-04-19
CN1098180A (zh) 1995-02-01
DK0636836T3 (da) 1999-04-26
ES2119910T3 (es) 1998-10-16
US5651320A (en) 1997-07-29
DE59406540D1 (de) 1998-09-03
EP0636836A3 (fr) 1995-08-09
FI104125B (fi) 1999-11-15
DE4325643A1 (de) 1995-02-02
FI941806A7 (fi) 1995-01-31
ZA941358B (en) 1994-09-22
EP0636836A2 (fr) 1995-02-01
FI104125B1 (fi) 1999-11-15

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