EP1741977B1 - Kohlenstaubbrenner für niedrige NOx-Emissionen - Google Patents

Kohlenstaubbrenner für niedrige NOx-Emissionen Download PDF

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Publication number
EP1741977B1
EP1741977B1 EP06013706A EP06013706A EP1741977B1 EP 1741977 B1 EP1741977 B1 EP 1741977B1 EP 06013706 A EP06013706 A EP 06013706A EP 06013706 A EP06013706 A EP 06013706A EP 1741977 B1 EP1741977 B1 EP 1741977B1
Authority
EP
European Patent Office
Prior art keywords
burner
air pipe
primary air
primary
mouth
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.)
Active
Application number
EP06013706A
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German (de)
English (en)
French (fr)
Other versions
EP1741977A1 (de
Inventor
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
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Hitachi Power Europe 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 Hitachi Power Europe GmbH filed Critical Hitachi Power Europe GmbH
Priority to PL06013706T priority Critical patent/PL1741977T3/pl
Publication of EP1741977A1 publication Critical patent/EP1741977A1/de
Application granted granted Critical
Publication of EP1741977B1 publication Critical patent/EP1741977B1/de
Active 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
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • 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
    • F23C7/006—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes adjustable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
    • F23D2201/10—Nozzle tips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2209/00—Safety arrangements
    • F23D2209/20—Flame lift-off / stability

Definitions

  • the invention is directed to a burner for burning pulverulent fuel, such as hard coal or lignite, preferably with a concentric structure comprising a primary air tube and a secondary air tube surrounding the primary air tube, wherein the mouth region of the primary air tube on the outside a Heilabweiskhle and inside a stabilizing ring has, which are formed as a one-piece component, wherein the stabilizing ring projects radially inwardly in the form of an internal toothing in the primary air tube, wherein the Lucasabweiskehle, the stabilizing ring and a part of the primary air tube are integrally formed.
  • pulverulent fuel such as hard coal or lignite
  • the burner technology for the combustion of dusty carbon pursues the goal at the present time of producing an intensive separation between oxygen and pyrolysis gas during the initial reaction or ignition in order subsequently to allow the combustion air to take part in the further oxidation of the solids and thereby to achieve an even more effective reduction of NO x emissions.
  • a NOx-arm burner comprising a pulverized coal nozzle for injecting a stream of a mixture of pulverized coal with primary air, a secondary air nozzle disposed outside and coaxial with the pulverized coal nozzle, a tertiary-air nozzle outside Secondary air nozzle and disposed coaxially with the pulverized coal nozzle, and eddy current generating means for injecting secondary air and tertiary air as eddy current.
  • a spacer having a thickness such that the mixing of the secondary air with the tertiary air is delayed and an eddy current is formed between the secondary air and the tertiary air.
  • Such a definition can be made by the interaction of the components of a swirl generator in the primary air tube, a stabilizing ring at the mouth of the primary air tube and a Heilabweiskehle the secondary air tube, as it EP-B-670 454 describes.
  • This patent discloses a generic burner, in which at the end of a burner tube, which is surrounded by a secondary air tube, arranged inside the mouth of the burner tube, a stabilizing ring and on the outside of the burner tube Lucasabweiskhle is arranged.
  • the burner tube and the stabilizing ring and on the other hand the burner tube and the Heilabweiskhle must be connected to each other. This is usually done by welding, so that in this area on each side of the burner tube, a weld or a welding surface is formed. For this purpose, it is necessary that the materials are matched accordingly. The choice of materials and the formation of the weld in this area leads to increased design effort. In addition, an increased repair and susceptibility due to the presence of welds and an impaired by these conditions durability is thus expected in the temperature-moderately high and flowed through by aggressive media mouth region of the primary or burner tube.
  • this object is achieved in that form the Luftabweiskehle, the stabilizing ring and a portion of the primary air tube the mouth region of the primary air tube, the Heilabweiskehle and the stabilizing ring flush with the mouth of the primary air tube and wherein the Heilabweiskehle on the Outside of the outlet-side end of the primary air tube is formed as a conically expanding radially outward portion.
  • the mouth region by a one-piece, the outside of the shape of Lucasabweiskehle exhibiting and inside the shape and contour of the Form stabilization ring having component.
  • This component can then be welded, for example, by means of a circumferential weld on the end face of a burner tube or primary air tube, so that only one weld is present in the region of the mouth. Since only one weld is required, the burner can be made faster than a burner of the prior art, in which two welds are necessary.
  • the weld further upstream, ie offset from the burner outlet opening, with respect to the air flow in the burner or primary or secondary air pipe, so that the weld seam is arranged upstream of the mouth end of a core air pipe optionally arranged in the primary pipe.
  • the inventively embodied burner area is characterized more durable, ie less susceptible to interference and repair and structurally simpler designed.
  • the one-piece component advantageously also has a part which forms an extension of the primary air tube, so to speak, as part of the primary air tube is to be regarded.
  • the Heilabweiskhle, the stabilizing ring and at least a portion of the primary air tube are therefore integrally formed and form the mouth region of the primary air tube, wherein the stabilizing ring with the mouth of the primary air tube terminates and / or the Lucasabweiskehle flush with the mouth of the primary air tube.
  • the Invention provides in an embodiment that the one-piece component is made by centrifugal casting.
  • the invention provides in an embodiment that the one-piece component to the primary air tube, preferably by welding, is fixed.
  • the invention is characterized by a arranged in the annular gap between the primary air tube and the secondary air duct air guide body which is adjustable in and against the flow direction between a retracted position in the annular gap and a flush with the mouth of the primary air pipe final position.
  • the burner has a core air tube arranged in the primary air tube, in which a pilot burner which is disposed between a burner ignition position and a burner operating position in and against the burner Flow direction is displaceable, is arranged, which the invention also provides.
  • the mouth of the core air tube is arranged upstream of the mouth of the primary air tube.
  • the invention also provides that a swirl body is arranged on the ignition-flame-side end of the pilot burner.
  • the invention provides that a primary swirl body is arranged in the annular gap between the core air tube and the primary air tube.
  • the invention is based on the known from the prior art burner technology for the combustion of pulverized hard coal and pulverized lignite.
  • the burner according to the invention which can be used both for the combustion of hard coal and for the combustion of lignite, preferably has a concentric structure with a primary air tube and a secondary air tube.
  • the surrounded by the cylindrical secondary air tube primary air tube forms this with a combustion air leading annular channel (secondary air channel).
  • a stabilizing ring On the inside at the outlet end (mouth) of the primary air tube, a stabilizing ring is arranged, which is formed by an inner edge to the burner longitudinal edge, which preferably terminates flush with the mouth and protrudes into the flow of primary air and coal dust.
  • the burner according to the invention additionally has a core air tube which is surrounded by the cylindrical primary air tube and forms a primary air and pulverized coal-carrying annular channel (primary air nozzle or dust tube nozzle). Due to the concentric arrangement of the core air tube, primary air tube and secondary air tube an individual single air supply is possible.
  • a pilot burner is disposed within the core air tube in the burner longitudinal axis.
  • a swirler is attached in the form of a blade ring, which is covered in the radial direction at its outer end by a pipe extension extending in Direction of flow widens conically and extends beyond the mouth of the pilot out.
  • the pilot burner, the swirl body of the pilot burner and the conical tube extension are preferably designed as a one-piece component, which is displaceable in the flow direction from a retracted position in the core air tube to a position at the mouth of the core air tube.
  • FIGS. 1 to 4 Due to the invention characterizing common features between coal burners and lignite burners, the description of the FIGS. 1 to 4 initially in a generally valid form.
  • the burner according to the invention which in the FIGS. 1 to 4 is shown, has a displaceable in the flow direction pilot burner 7, which is arranged in the burner longitudinal axis within a core air tube 6.
  • the cylindrical core air tube 6 is surrounded by a cylindrical primary air tube 1, whereby an annular channel is formed.
  • This annular channel is in turn surrounded by a cylindrical secondary air tube 2 and thereby divides the combustion air sector in at least one or two annular channels.
  • This ring 4 has the shape of an internal toothing and protrudes into the flow region of the pulverized coal, so that the coal particles collide against a resistance before leaving the primary tube or primary air tube 1. Due to the impact on the ring 4, the carbon particles are braked sharply.
  • the core air tube 6 In order to shift the particle flow of pulverized coal from the annular channel, which is formed by the core air tube 6 and the primary air tube 1, further in the direction of the burner axis and thus increase the extent of the recirculation region, the core air tube 6, viewed in the flow direction, preferably clearly before the stabilizing ring 4 of the dust tube nozzle end.
  • a safe operation of the adjustable pilot burner 7, especially in combined operation with oil and coal not possible because the inwardly directed to the burner axis flow of coal dust affects the flame of the pilot burner 7 and additionally the Ignition flame monitoring is obstructed due to the darkening of the coal dust.
  • the spin burner 7 attached to the swirl body 8 is in its outer region by a Pipe extension 9 covered.
  • This pipe extension 9, which surrounds the blade ring of the swirl body 8, is extended downstream conically and serves as a deflector for the coal dust, which is deflected by the stabilizing ring 4 in the direction of the burner center.
  • the local position of the conical tube extension 9 is adjustable in the flow direction. This ensures reliable ignition and monitorability of the pilot burner flame in all operating situations.
  • FIG. 1 shows a hard coal burner, in which the pilot burner 7 is retracted into the core air tube 6 and the adjustable secondary air guide 5 is disposed in the mouth of the primary air tube 1.
  • the Sekundär Kunststoffleit analysess 5 this is not further downstream and closes flush with the Lucasabweiskhle 3, whereby the operation of the Heilabweiskehle 3 is amplified.
  • the secondary air flowing through the annular channel formed by the primary air tube 1 and the secondary air tube 2 is deflected outwardly and moves away from the flame core of the primary combustion zone in the radial direction.
  • an adjustable maximum separation layer is created downstream of the mouth of the primary air tube 1 between primary combustion and secondary air flow. This maximum in its extent recirculation area provides for the in FIG. 1 Underlying operating condition is an optimum in terms of NO x reduction.
  • FIG. 4 shows an embodiment of a lignite burner having the same inventive features as the hard coal burner described above. Differences to a hard coal burner exist in the proportions of the diameter of the burner pipes.
EP06013706A 2005-07-07 2006-07-03 Kohlenstaubbrenner für niedrige NOx-Emissionen Active EP1741977B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06013706T PL1741977T3 (pl) 2005-07-07 2006-07-03 Palnik na pył węglowy dla niskich emisji NOx

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005032109A DE102005032109B4 (de) 2005-07-07 2005-07-07 Kohlenstaubbrenner für niedrige NOx-Emissionen

Publications (2)

Publication Number Publication Date
EP1741977A1 EP1741977A1 (de) 2007-01-10
EP1741977B1 true EP1741977B1 (de) 2011-09-21

Family

ID=37054517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06013706A Active EP1741977B1 (de) 2005-07-07 2006-07-03 Kohlenstaubbrenner für niedrige NOx-Emissionen

Country Status (7)

Country Link
EP (1) EP1741977B1 (xx)
AT (1) ATE525614T1 (xx)
DE (1) DE102005032109B4 (xx)
ES (1) ES2373562T3 (xx)
PL (1) PL1741977T3 (xx)
RS (1) RS52071B (xx)
ZA (1) ZA200605567B (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2592341A1 (en) 2011-11-09 2013-05-15 Fortum OYJ Pulverized fuel burner
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
DE102015111585A1 (de) 2015-07-16 2017-01-19 Mitsubishi Hitachi Power Systems Europe Gmbh Kohlenstaubbrenner mit einstückiger, elektrisch beheizter Brennstoffdüse
DE102019103640A1 (de) * 2019-02-13 2020-08-13 Mitsubishi Hitachi Power Systems Europe Gmbh Brennstoffdüse mit Dehnungsschlitzen für einen Kohlenstaubbrenner

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007025051B4 (de) * 2007-05-29 2011-06-01 Hitachi Power Europe Gmbh Hüttengasbrenner
JP2009216281A (ja) * 2008-03-10 2009-09-24 Ihi Corp 微粉燃料用バーナ
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
CN101725969B (zh) * 2010-01-19 2011-08-17 中国计量学院 一种低NOx煤粉燃烧器
DE102012007884A1 (de) 2012-04-23 2013-10-24 Babcock Borsig Steinmüller Gmbh Brenner für staub- und/oder partikelförmige Brennstoffe mit veränderlichem Drall
CN103335308A (zh) * 2013-06-10 2013-10-02 郑州奥通热力工程有限公司 可调节多风道煤粉燃烧器
CN103343966A (zh) * 2013-06-11 2013-10-09 郑州奥通热力工程有限公司 三旋五风道煤粉燃烧器
DE102013106656A1 (de) * 2013-06-25 2015-01-08 Brinkmann Industrielle Feuerungssysteme Gmbh Brennerlanze und Verfahren zum Betreiben einer Brennerlanze für industrielle Thermoprozesse
DE102013017367A1 (de) * 2013-10-21 2015-04-23 Brinkmann Industrielle Feuerungssysteme Gmbh Brennerlanze und Verfahren zum Betreiben einer Brennerlanze für industrielle Thermoprozesse
CN103629663B (zh) * 2013-11-15 2016-02-24 东方电气集团东方锅炉股份有限公司 旋流煤粉燃烧器
CN104728837A (zh) * 2015-04-03 2015-06-24 南京创能电力科技开发有限公司 一种工业锅炉旋流微油煤粉燃烧器

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
JPS60226609A (ja) * 1984-04-23 1985-11-11 Babcock Hitachi Kk 燃焼装置
DE3518080A1 (de) * 1985-05-20 1986-11-20 Stubinen Utveckling AB, Stockholm Verfahren und vorrichtung zum verbrennen fluessiger und/oder fester brennstoffe in pulverisierter form
JPH0754162B2 (ja) * 1986-05-26 1995-06-07 株式会社日立製作所 低ＮＯｘ燃焼用バ−ナ
US5199355A (en) * 1991-08-23 1993-04-06 The Babcock & Wilcox Company Low nox short flame burner
DE4217879A1 (de) * 1992-05-29 1993-12-02 Babcock Energie Umwelt Brenner für staubförmigen Brennstoff
DE4395243T1 (de) * 1993-11-08 1996-11-21 Ivo International Oy Verfahren und Vorrichtung zum Verbrennen von pulverförmigem Brennmaterial
DE4407198A1 (de) * 1994-03-04 1995-09-07 Lentjes Kraftwerkstechnik Braunkohlenbrenner
DE29520696U1 (de) * 1995-12-29 1996-02-29 Babcock Babcock Lentjes Kraftw Kohlenstaubbrenner
DE69735965T2 (de) * 1996-07-19 2007-01-04 Babcock-Hitachi K.K. Brenner
JP3344694B2 (ja) * 1997-07-24 2002-11-11 株式会社日立製作所 微粉炭燃焼バーナ
JP3343855B2 (ja) * 1998-01-30 2002-11-11 株式会社日立製作所 微粉炭燃焼バーナ及び微粉炭燃焼バーナの燃焼方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2592341A1 (en) 2011-11-09 2013-05-15 Fortum OYJ Pulverized fuel burner
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
DE102015111585A1 (de) 2015-07-16 2017-01-19 Mitsubishi Hitachi Power Systems Europe Gmbh Kohlenstaubbrenner mit einstückiger, elektrisch beheizter Brennstoffdüse
DE102019103640A1 (de) * 2019-02-13 2020-08-13 Mitsubishi Hitachi Power Systems Europe Gmbh Brennstoffdüse mit Dehnungsschlitzen für einen Kohlenstaubbrenner
WO2020165357A1 (de) 2019-02-13 2020-08-20 Mitsubishi Hitachi Power Systems Europe Gmbh Brennstoffdüse mit dehnungsschlitzen für einen kohlenstaubbrenner

Also Published As

Publication number Publication date
EP1741977A1 (de) 2007-01-10
ES2373562T3 (es) 2012-02-06
ZA200605567B (en) 2007-09-26
PL1741977T3 (pl) 2012-02-29
RS52071B (en) 2012-06-30
DE102005032109A1 (de) 2007-01-18
ATE525614T1 (de) 2011-10-15
DE102005032109B4 (de) 2009-08-06

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