EP1269074B1 - Zweistoff-brenner mit venturirohr-brennstoffzerstäubung und venturidüse zum zerstäuben von flüssigem brennstoff - Google Patents

Zweistoff-brenner mit venturirohr-brennstoffzerstäubung und venturidüse zum zerstäuben von flüssigem brennstoff Download PDF

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Publication number
EP1269074B1
EP1269074B1 EP01917113A EP01917113A EP1269074B1 EP 1269074 B1 EP1269074 B1 EP 1269074B1 EP 01917113 A EP01917113 A EP 01917113A EP 01917113 A EP01917113 A EP 01917113A EP 1269074 B1 EP1269074 B1 EP 1269074B1
Authority
EP
European Patent Office
Prior art keywords
venturi
venturi nozzle
fuel
burner
combustion 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
EP01917113A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1269074A1 (de
Inventor
Christian Hubbauer
Bernd Mittmann
Thomas Kerscher
Christine Sallinger
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.)
Webasto Thermosysteme GmbH
Webasto Thermosysteme International GmbH
Original Assignee
Webasto Thermosysteme GmbH
Webasto Thermosysteme International 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
Priority claimed from DE2000114405 external-priority patent/DE10014405B4/de
Priority claimed from DE2000114347 external-priority patent/DE10014347A1/de
Application filed by Webasto Thermosysteme GmbH, Webasto Thermosysteme International GmbH filed Critical Webasto Thermosysteme GmbH
Publication of EP1269074A1 publication Critical patent/EP1269074A1/de
Application granted granted Critical
Publication of EP1269074B1 publication Critical patent/EP1269074B1/de
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
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet
    • F23D11/102—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber
    • F23D11/103—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber with means creating a swirl inside the mixing chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2211/00—Thermal dilatation prevention or compensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00018—Means for protecting parts of the burner, e.g. ceramic lining outside of the flame tube

Definitions

  • the invention relates to a two-component burner, in particular a burner for a vehicle auxiliary heating system, for the combustion of liquid Fuel in the presence of combustion air, with a combustion chamber, the one Nozzle for atomizing the liquid fuel is connected upstream and a Venturi nozzle for atomising liquid fuel.
  • Such a burner is known from DE 41 18 538 C2.
  • This burner is based on a two-fluid nozzle for atomizing fuel, which is a relative has complicated structure.
  • this nozzle consists of an im essential cylindrical mixing chamber, one with respect to the longitudinal axis thereof coaxial feed tube for the liquid fuel and a Combustion air feed.
  • the mixing chamber of the nozzle is through a nozzle insert completed to discharge atomized fuel / combustion air mixture and has a central nozzle bore and one in the flow direction converging conical inner bevel.
  • the combustion air supply exists from a feed tube tangential to the mixing chamber wall interspersed, immersed in this and at a higher altitude above the Nozzle insert opens, as the feed pipe for the liquid fuel.
  • Venturi tubes In the context of gas burners, it is known Venturi tubes as To use mixing device. Further, from US 4,396,372 a Burner system known in the liquid fuel in the form of kerosene by means a nozzle in a provided with an electric heater Evaporator is promoted with a venturi-shaped inlet region. Further Burner with venturiohr are from WO 98 / 28493A and from US 5220786 A known.
  • An object of the present invention is to provide a burner or to create a venturi for atomizing liquid fuel, the no high air overpressure to atomize the liquid fuel require and work reliably.
  • Both the assembly costs and the production costs are advantageously reduced if at least the front portion of the Venturi tube diffuser part or the Venturi nozzle integral with the combustion chamber is formed.
  • the diffuser part of the Venturi tube or Venturi nozzle is in the simplest case with formed a uniform opening angle. According to an advantageous However, this venturi tube or Venturi nozzle diffuser part can be further development Have sections of different opening angle, wherein the section adjacent to the combustion chamber with the largest opening angle.
  • the fuel is the venturi or Venturi supplied via a fuel supply tube whose downstream end in the Venturi tube is in it.
  • This downstream end of the fuel delivery tube optionally in a downstream two-fluid nozzle or in the negative pressure area of a second, smaller Venturi tube, in turn through the pressure gradient of the Venturi tube or Venturi nozzle is operated and ends in its negative pressure area, to already one To achieve pre-atomization.
  • the fuel supply tube is further advantageously within the Venturi tube or Venturi coaxial with the longitudinal center arranged to extend.
  • the downstream end may be on be arranged at different locations of the Venturi tube or Venturi, For example, in the inlet part or in the diffuser part of the Venturi tube or the Venturi or at its narrowest point between inlet part and diffuser part.
  • the combustion chamber with at least to provide an additional inlet for secondary combustion air.
  • This Secondary combustion air inlet is preferably in the plane of the combustion chamber, in which opens the Venturi tube or Venturi nozzle.
  • the dual-fuel burner according to the invention comprises a combustion chamber 10 in a preferably cylindrical or cuboid shape.
  • a venturi 11 To the Fuel / combustion air inlet side of the combustion chamber 10 is a venturi 11 connected. Venturi tube 11 forming a venturi is preferred formed integrally with the combustion chamber 10 at least in the connection area.
  • the Venturi tube 11 consists in a conventional manner of a diffuser part 12 and an inlet part 13.
  • the diffuser part 12 has a longer axial Extension than the inlet part 13 and preferably has a conical shape, wherein the End with the largest diameter of the conical diffuser part 12 to the Fuel / combustion air inlet of the combustion chamber 10 is connected.
  • the Inlet part 13, which also has conical shape or one or more Inlet radii with an optionally connected cylindrical part, however, its largest diameter portion away from the combustion chamber 10 points, adjacent to the smallest diameter in the end of the diffuser part 12.
  • Venturi tube 11 and combustion chamber 10 are preferably located on a common Longitudinal central axis 14. With this longitudinal central axis 14 is aligned a fuel supply tube 15, at the downstream end of a two-fluid nozzle 16 connects. The outlet opening of the two-fluid nozzle 16 is located at the narrowest Position between the diffuser part 12 and inlet part 13 of the Venturi tube 11, that is in a negative pressure region opposite to the combustion chamber 10, as shown in FIG. 2 clarified.
  • a small Venturi tube 19 may be provided at the same location, which by the pressure drop of the Venturi tube 11 is operated and in the Negative pressure area ends in order to achieve pre-atomization.
  • the fuel supply tube 15 opens in the smaller Venturi tube 19, through which air is also conveyed.
  • Combustion air is in the inlet part 13 of the Venturi tube 11 by means of a not fed fan, the combustion air with only a small Provides overpressure.
  • the combustion air is along the arrow 17 in the Venturi tube 11 promoted.
  • the axial pressure curve in the Venturi tube 11 is shown in Fig. 2 in a diagram represented on the X-axis, the length l of the Venturi tube 11 applied is, and on the Y-axis of the differential pressure Ap in the venturi 11th is applied. Accordingly, the combustion air has at the entry point in the Inlet part 13 of the Venturi tube 11 a slight overpressure, by the the Combustion-promoting blower is achieved.
  • the speed wherein at the same time the pressure of the combustion air drops and in the transition to the subsequent Diffuser part 12 reaches a minimum value.
  • This minimum absolute pressure corresponds to a maximum negative pressure compared to the Combustion chamber pressure level. This negative pressure decreases in the further course of the Diffuser portion 12 downstream, so that the entering into the combustion chamber 10 Combustion air is approximately at combustion chamber pressure.
  • the nozzle 16 has at least one radial bore 18 in the axial Fuel delivery hole of the nozzle 16 opens. About this radial bore 18th Air is introduced into the conveying path of the liquid fuel, so that in the Nozzle 16 is a turbulence of combustion air and liquid fuel takes place. This mixture then emerges atomized from the outlet opening of the nozzle 16 and mixes in the diffuser part 12 with the sucked along the arrow 17 Combustion air, the inlet part 13 by the fan with low pressure provided.
  • Fig. 4 shows schematically in longitudinal section one with an embodiment of a Venturi nozzle according to the invention equipped rear part of a combustion chamber a burner for a vehicle auxiliary heater.
  • the generally designated by the reference numeral 110 cylindrical Combustion chamber is preceded by a combustion air supply chamber 111, in which Combustion air with means not shown, typically by means of a blower is supplied.
  • the combustion chamber 110 is coaxial with its longitudinal central axis L running, which is shown in phantom, a connection opening 122 for Connection of the downstream end of a venturi 112, the complete is within the combustion air supply chamber 111.
  • To this connection opening 122nd around are annularly arranged smaller openings 123 for the Passage of secondary combustion air into the combustion chamber 110.
  • the venturi 112 includes in the upstream region in the Combustion chamber 110 conical conical diffuser 113, the in tapered upstream. Included in the upstream area the Venturi 112 a conical inlet part 114, the one to the diffuser 113 opposite diameter course, that is in the direction of the conical 113 tapers conically. At the outer end of the inlet part 114th joins a cylinder part 115 which in the combustion air supply chamber 111 opens. Diffuser 113 and inlet portion 114 are one in diameter small cylinder part 116, in which a fuel supply tube 117, which extends coaxially to the longitudinal center axis of the venturi 112 and outside this nozzle angled from the combustion air supply chamber 111 led out.
  • combustion air supply chamber 111 and venturi 112 liquid fuel is moved through in the area of the narrowest point (in the area the cylinder part 116) prevailing negative pressure sucked into the combustion air and atomized.
  • the inlet part 114 supplied combustion air from the Combustion air supply chamber 111 is together with the atomized fuel entered from the venturi 112 in the combustion chamber 110.
  • the fog out Fuel and combustion air is ignited in the combustion chamber 110 and under Admixture of additional secondary combustion air from the openings 123 burned.
  • a Ignition device projects into the combustion chamber 110 a Ignition device, which in the figure 4 by the reference numeral 124 schematically is shown and whose end in the area of the mouth of the conical Diffuser 113 of the venturi 112 extends.
  • Venturi 112 is divided axially into two parts, namely in a discharge part 118 which adjoins the combustion chamber 10 and a upstream of this discharge part 118 arranged supply part 119th Die axial subdivision of the venturi 112 is in the region of its diffuser 113 taken so that the supply member 119 is about twice as long as the discharge part 18th
  • the Width is typically between 0.1 and 0.8 mm.
  • the Slit width of about 0.3 mm selected.
  • the annular gap 120 is in the axial direction through the mutually facing annular end faces of discharge 118 and feed member 119 and bounded radially by a ring seal 121, which the annular gap 120 and thus the conical diffuser 113 to the outside seals.
  • the material of the ring seal 121 is preferably made of a heat-insulating material such as ceramic.
  • the venturi 112 consists of metal, but preferably also at least partially of ceramic.
  • the material for the two Venturi nozzle parts 118, 119 may be the same. Preferably, however, it is provided that the material of the discharge part 118 a has lower thermal conductivity than the material of the supply member 119, so little heat as possible to the annular gap 120 between the two Venturi nozzle parts 118 and 119, respectively.
  • the upstream cold Feed part 119 is due to the division of the Venturi nozzle in operation typically loaded with temperatures below 180 ° C, so that in this Düsenteil 119 no cracking of the fuel can take place.
  • the flame-side hot discharge part 118 of the venturi 112 typically loaded with temperatures above 500 ° C, so that on the inner wall of the fuel supply tube 117 incident liquid fuel evaporates without leaving cracking residue. Consequently is ensured that the venturi 112 is added with residues and so that their performance is at least impaired.
  • the ring seal 121 can fill the entire annular gap 120. alternative this is also conceivable, the ring seal 121 completely omitted omitted. at a very narrow annular gap 120 occurs virtually no leakage from Fuel air mixture to the outside. Low leakage quantities would be there fed to the secondary combustion air of the combustion chamber and burned there.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Spray-Type Burners (AREA)
EP01917113A 2000-03-24 2001-03-23 Zweistoff-brenner mit venturirohr-brennstoffzerstäubung und venturidüse zum zerstäuben von flüssigem brennstoff Expired - Lifetime EP1269074B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE2000114405 DE10014405B4 (de) 2000-03-24 2000-03-24 Venturidüse für einen Zweistoff-Brenner
DE2000114347 DE10014347A1 (de) 2000-03-24 2000-03-24 Zweistoff-Brenner mit Venturirohr-Brennstoffzerstäubung
DE10014347 2000-03-24
DE10014405 2000-03-24
PCT/EP2001/003358 WO2001071251A1 (de) 2000-03-24 2001-03-23 Zweistoff-brenner mit venturirohr-brennstoffzerstäubung und venturidüse zum zerstäuben von flüssigem brennstoff

Publications (2)

Publication Number Publication Date
EP1269074A1 EP1269074A1 (de) 2003-01-02
EP1269074B1 true EP1269074B1 (de) 2005-08-10

Family

ID=26004970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01917113A Expired - Lifetime EP1269074B1 (de) 2000-03-24 2001-03-23 Zweistoff-brenner mit venturirohr-brennstoffzerstäubung und venturidüse zum zerstäuben von flüssigem brennstoff

Country Status (7)

Country Link
US (1) US6793487B2 (zh)
EP (1) EP1269074B1 (zh)
JP (1) JP2003528282A (zh)
KR (2) KR100825179B1 (zh)
CN (1) CN1246628C (zh)
DE (1) DE50107045D1 (zh)
WO (1) WO2001071251A1 (zh)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10039152A1 (de) 2000-08-06 2002-02-14 Webasto Thermosysteme Gmbh Zerstäuberbrenner
EP1423189B1 (de) * 2001-09-05 2007-08-15 Webasto Thermosysteme International GmbH System zum umsetzen von brennstoff und luft zu reformat und verfahren zur montage eines solchen systems
CA2475471C (en) * 2002-02-28 2008-08-05 Webasto Thermosysteme Gmbh System for reacting fuel and air to produce a reformate
EP1597516A1 (de) * 2003-02-28 2005-11-23 Webasto AG System zum zuf hren von brennluft und fl ssigem brennst off in einen brenner
DE10347509B4 (de) * 2003-10-13 2006-08-10 Webasto Ag Heizgerät mit einer Zerstäuberdüse
DE10357474B4 (de) * 2003-12-09 2006-05-24 Webasto Ag System zum Umsetzen von Brennstoff und Luft zu Reformat
US20060249596A1 (en) * 2005-05-06 2006-11-09 Cheng-Tsan Chou Pre-mixing torch device and method for optical fiber couplers
JP2007322019A (ja) * 2006-05-30 2007-12-13 Nippon Chem Plant Consultant:Kk 燃焼器
WO2008052361A1 (en) * 2006-11-03 2008-05-08 Nxtgen Emission Controls Inc. Fuel processor
CN102997240A (zh) * 2012-12-08 2013-03-27 中山华帝燃具股份有限公司 一种稳定火焰传播的燃气燃烧器
US20150104752A1 (en) * 2013-10-15 2015-04-16 Jlcc, Inc. Smokeless flare burner
US9416966B2 (en) 2014-07-25 2016-08-16 Flame Commander Corp. Venturi nozzle for a gas combustor
US11246451B2 (en) 2015-10-12 2022-02-15 Weber-Stephen Products Llc Burner tube for gas grill
US10281144B2 (en) 2015-10-15 2019-05-07 Weber-Stephen Products Llc Gas inlet fixture and air shutter
CA3019194A1 (en) 2016-03-30 2017-10-05 Marine Canada Acquisition Inc. Vehicle heater and controls therefor
CN107062212B (zh) * 2017-05-22 2023-11-07 北京醇能科技有限公司 一种低沸点燃料分级燃烧装置及其系统

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Publication number Priority date Publication date Assignee Title
US2857961A (en) * 1954-07-13 1958-10-28 Brown Fintube Co Oil burners
US4004875A (en) * 1975-01-23 1977-01-25 John Zink Company Low nox burner
US4375352A (en) * 1978-06-30 1983-03-01 Southwire Company Method for melting a non-ferrous metal charge with liquid fuel
US4230449A (en) * 1979-03-19 1980-10-28 Coen Company Self contained compact burner
JPS5653308A (en) * 1979-10-03 1981-05-12 Hitachi Ltd Liquid fuel evaporation type combustor
US4402929A (en) * 1980-02-05 1983-09-06 Phillips Petroleum Company Method for producing a high DPG carbon black
US5220786A (en) * 1991-03-08 1993-06-22 General Electric Company Thermally protected venturi for combustor dome
DE4118538C2 (de) 1991-06-06 1994-04-28 Maurer Friedrich Soehne Zweistoffdüse
US6220034B1 (en) * 1993-07-07 2001-04-24 R. Jan Mowill Convectively cooled, single stage, fully premixed controllable fuel/air combustor
JP3215994B2 (ja) * 1993-09-30 2001-10-09 株式会社日本ケミカル・プラント・コンサルタント 燃焼器
KR100211676B1 (ko) * 1996-12-24 1999-08-02 구이회 스팀 전환가열식 완전연소 드라이어버너를 채용한 냉골재 가열장치
JPH11201454A (ja) 1997-12-31 1999-07-30 R Jan Mowill 空燃比が制御可能な改良された対流冷却・ 単段階・ 完全予備混合式燃焼器

Also Published As

Publication number Publication date
US6793487B2 (en) 2004-09-21
WO2001071251A1 (de) 2001-09-27
KR20020081699A (ko) 2002-10-30
DE50107045D1 (de) 2005-09-15
JP2003528282A (ja) 2003-09-24
CN1418305A (zh) 2003-05-14
US20030143506A1 (en) 2003-07-31
CN1246628C (zh) 2006-03-22
EP1269074A1 (de) 2003-01-02
KR100825179B1 (ko) 2008-04-24
KR20080011464A (ko) 2008-02-04
KR100825180B1 (ko) 2008-04-24

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