EP1489352B1 - Dispositif de mélange pour un brûleur au gaz ou au fioul - Google Patents

Dispositif de mélange pour un brûleur au gaz ou au fioul Download PDF

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Publication number
EP1489352B1
EP1489352B1 EP04013442.1A EP04013442A EP1489352B1 EP 1489352 B1 EP1489352 B1 EP 1489352B1 EP 04013442 A EP04013442 A EP 04013442A EP 1489352 B1 EP1489352 B1 EP 1489352B1
Authority
EP
European Patent Office
Prior art keywords
combustion air
mixing device
orifice plate
chamber
housing
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
EP04013442.1A
Other languages
German (de)
English (en)
Other versions
EP1489352A1 (fr
Inventor
Thomas Enzian
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1489352A1 publication Critical patent/EP1489352A1/fr
Application granted granted Critical
Publication of EP1489352B1 publication Critical patent/EP1489352B1/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
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details
    • F23D11/40—Mixing tubes; Burner heads
    • F23D11/408—Flow influencing devices in the air tube
    • 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
    • F23D11/001—Spraying nozzle combined with forced draft fan in one unit
    • 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
    • F23D2900/11401—Flame intercepting baffles forming part of burner head
    • 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
    • F23D2900/11403—Flame surrounding tubes in front of burner nozzle

Definitions

  • the invention relates to a mixing device for an oil or gas burner according to the preamble of claim 1.
  • a generic burner is for example from the EP 0 558 455 A1 known.
  • the burner consists of a burner housing with a chamber arranged in the latter and a flame tube connected thereto.
  • the air enters the chamber radially from the housing and is displaced by vanes in a helical circulation.
  • a nozzle with a fuel jet generating nozzle is arranged, and in the flame tube, the fuel jet spreads.
  • a diaphragm Between the chamber and the combustion chamber is a diaphragm with a central opening through which the fuel jet passes. With a blower entering the combustion chamber combustion air flow is generated.
  • the burner from the EP 0 683 883 B1 consists of a burner housing, which has a support tube with an arranged in this prechamber and an adjoining flame tube.
  • a nozzle with a fuel jet nozzle is arranged in the prechamber, and in the flame tube, the fuel jet spreads.
  • a diaphragm with a central opening through which the fuel jet passes is generated. This includes a partial stream close to the fuel jet and a recirculation-stabilizing partial flow.
  • the radially outer recirculation-stabilizing partial flow has the shape of a flow pattern corresponding to an annular flow interrupted in the circumferential direction, so that an inner recirculation flow running back from the blue-burning flame to the non-combusting part of the fuel jet is formed in the combustion chamber.
  • the recirculation-stabilizing partial flow of the combustion air stabilizes the inner recirculation flow.
  • the disclosure DE 199 48 876 A1 a method for providing a homogeneous combustion air flow by changing the structure.
  • the air flow is pressed by the impeller of a fan in the spiral channel of the blower housing and passed therefrom in an approximately rectangular deflection in a laterally arranged burner housing.
  • the combustion air flows through air holes in a distributor element in the combustion zone of a fan burner.
  • this arrangement may adversely affect combustion quality and flame stability because of turbulence. These reach up to the aperture and / or the incoming combustion air occurs unevenly through the mantle of the calming element.
  • a combustion device for soot-free burning of liquid fuels is additionally known in which the air flowing through the air duct can be regulated by means of an axially adjustable, cylindrical gasifier head.
  • This is mounted in the region of a spray nozzle and has on its jacket individual incorporated through openings for a first partial flow of the combustion air.
  • the carburetor head together with the air duct at the height of the nozzle opening forms a throttle point for the amount of air to be supplied in the form of a partial flow, which flows directly from the air duct into the combustion zone.
  • the invention has for its object to provide a compact constructed mixing device for an oil or gas burner and to optimize its combustion quality and robustness in different operating conditions.
  • the mixing device for an oil or gas burner is characterized in that upstream of the orifice, between the orifice and the nozzle, a chamber is formed with a homogenizing element with finely distributed passages for the combustion air flow.
  • the combustion air flow from the housing enters radially and thus passes evenly from all sides to the flow openings in the diaphragm.
  • the cylindrical homogenizing element abuts in the axial direction both on the diaphragm and on a closed boundary wall on the side of the nozzle block.
  • a perforated plate forms the cylindrical homogenizing element.
  • the boundary wall of the chamber on the side of the nozzle assembly is placed on this and the holding devices for the diaphragm, which may be attached to the boundary wall or directly on the nozzle, are arranged within the homogenizing element.
  • the depth of the cylindrical homogenization element or the distance between the diaphragm and the boundary wall corresponds approximately to half the diameter of the diaphragm.
  • the panel may be attached directly to the boundary wall via the homogenizing element. Additional holding devices can then be omitted.
  • the boundary wall is extended on the side of the nozzle assembly to the wall of the housing and provided outside in the region of the annular gap with passage openings for the combustion air flow, the total cross-sections are preferably selected to be greater than the total cross sections of all passage openings on the equalization.
  • flow guide elements for example ribs, can generally be arranged in the outlet region of the combustion air channel and / or on the inside of the wall of the housing.
  • a plurality of cylindrical homogenizing elements with different diameters, and with respectively different or identical cross sections or arrangements of the individual passage openings for the combustion air flow, are arranged one above the other at a small distance. These are associated with each other and ensure multiple equalization of the radially entering the chamber at the aperture combustion air.
  • the cross sections of the passage openings for the combustion air flow on the jacket of a homogenizing element can vary as needed. In this case, smaller cross sections are preferably present in the vicinity of the aperture.
  • a compact constructed mixing device for an oil or gas burner is created and its combustion quality and Robustness optimized in different operating conditions.
  • blowers with a combustion air duct which is aligned approximately at right angles to the axis of the mixing device and the combustion air flow does not flow in the axial direction in the housing upstream of the aperture, a uniform, possible low turbulence flow of the aperture is guaranteed.
  • expensive distribution and calming devices in the discharge area of the combustion air duct can be omitted.
  • the drawing illustrates an embodiment of the invention and shows in a single figure a vertical longitudinal section through a mixing device of an oil or gas burner.
  • the mixing device consists of a flame tube 1, which surrounds a combustion chamber 2, in which a fuel jet from a fuel nozzle 3 propagates. This is upstream of the combustion chamber 2, shortly behind a diaphragm 4 with flow openings 5 for the combustion air, mounted on a so-called nozzle 6.
  • the combustion air flow is generated. It opens via a combustion air duct 7 approximately at right angles to the axis of the mixing device in a housing 8 upstream of the aperture. 4
  • a chamber 9 Between the diaphragm 4 and the nozzle 6 is a chamber 9, surrounded by a homogenizing element 10 with finely distributed passages 11 for the combustion air flow.
  • a homogenizing element 10 In the chamber 9, the combustion air flow from the housing 8 enters radially and passes from there to the flow openings 5 in the diaphragm 4.
  • the cylindrical homogenizing element 10 is located in the axial direction both on the diaphragm 4 and on a boundary wall 12 on the side of the Nozzle stock 6 and forms outside of the wall of the cylindrical housing 8 an annular gap.

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

Claims (7)

  1. Dispositif mélangeur pour un brûleur à fioul ou à gaz, constitué d'un raccord de buse (6) avec un dispositif distributeur positionné et une buse à combustible centrale (3), d'un tube de flammes (1) pénétrant à l'intérieur d'une chambre de combustion, d'un diaphragme (4) avec des ouvertures d'écoulement (5) pour l'air de combustion dans la région de sortie d'un canal d'air de combustion (7), qui est raccordé à une soufflante et qui est orienté approximativement à angle droit par rapport à l'axe du dispositif mélangeur et qui débouche dans un boîtier (8) en amont du diaphragme (4), ainsi que d'une chambre (9) en amont avant le diaphragme (4), entre le diaphragme (4) et le raccord de buse (6), dans laquelle le courant d'air de combustion sortant du boîtier (8) entre radialement,
    caractérisé en ce que la chambre (9) est formée avec un élément d'homogénéisation (10) muni d'ouvertures de passage finement réparties (11) pour le courant d'air de combustion, l'élément d'homogénéisation (10) s'appliquant dans la direction axiale ainsi que contre le diaphragme (4) ainsi que contre une paroi de limitation (12) du côté du raccord de buse (6) et formant une fente annulaire avec un espacement radial par rapport à la paroi du boîtier cylindrique (8), et en ce que la paroi de limitation (12) est prolongée du côté du raccord de buse (6) jusqu'à la paroi du boîtier (8) et est pourvue à l'extérieur dans la région de la fente annulaire d'ouvertures de passage pour le courant d'air de combustion, dont les sections transversales totales sont sélectionnées de préférence de manière à être supérieures aux sections transversales totales de toutes les ouvertures de passage (11) au niveau de l'élément d'homogénéisation (10).
  2. Dispositif mélangeur selon la revendication 1,
    caractérisé en ce que l'élément d'homogénéisation (10) est cylindrique et est de préférence une tôle perforée.
  3. Dispositif mélangeur selon l'une quelconque des revendications 1 à 2,
    caractérisé en ce que la paroi de limitation (12) de la chambre (9) est posée sur le raccord de buse (6) du côté de ce dernier et en ce que des dispositifs de retenue pour le diaphragme (4) sont disposés à l'intérieur de l'élément d'homogénéisation (10).
  4. Dispositif mélangeur selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que la profondeur de l'élément d'homogénéisation cylindrique (10) ou la distance entre le diaphragme (4) et la paroi de limitation (12) correspond approximativement à la moitié du diamètre du diaphragme (4).
  5. Dispositif mélangeur selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que dans la région de sortie du canal d'air de combustion (7) et/ou du côté intérieur de la paroi du boîtier (8) sont disposés des éléments de guidage de l'écoulement.
  6. Dispositif mélangeur selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que plusieurs éléments d'homogénéisation cylindriques (10) de diamètres différents, et de sections transversales ou d'agencements à chaque fois identiques ou différents des ouvertures de passage individuelles (11) pour le courant d'air de combustion, sont disposés à faible distance les uns au-dessus des autres et sont associés les uns aux autres.
  7. Dispositif mélangeur selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que les sections transversales des ouvertures de passage (11) pour le courant d'air de combustion varient sur l'enveloppe d'un élément d'homogénéisation (10), des sections transversales plus petites étant de préférence prévues à proximité du diaphragme (4).
EP04013442.1A 2003-06-18 2004-06-08 Dispositif de mélange pour un brûleur au gaz ou au fioul Expired - Lifetime EP1489352B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003127391 DE10327391B3 (de) 2003-06-18 2003-06-18 Mischeinrichtung für einen Öl- oder Gasbrenner
DE10327391 2003-06-18

Publications (2)

Publication Number Publication Date
EP1489352A1 EP1489352A1 (fr) 2004-12-22
EP1489352B1 true EP1489352B1 (fr) 2013-08-14

Family

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EP04013442.1A Expired - Lifetime EP1489352B1 (fr) 2003-06-18 2004-06-08 Dispositif de mélange pour un brûleur au gaz ou au fioul

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EP (1) EP1489352B1 (fr)
DE (1) DE10327391B3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10533740B2 (en) 2015-07-09 2020-01-14 Carrier Corporation Inward fired ultra low NOX insulating burner flange
CN115435338B (zh) * 2022-11-09 2023-01-03 中国空气动力研究与发展中心超高速空气动力研究所 一种采用混合喷嘴的大流量燃烧加热喷注器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407504A1 (de) * 1974-02-16 1975-08-28 Elco Oelbrennerwerk Ag Brennvorrichtung zum russfreien verbrennen von fluessigen brennstoffen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2553953C2 (de) * 1975-12-01 1978-04-20 Max Weishaupt Gmbh, 7959 Schwendi Brenner für flüssige Brennstoffe
DE7823246U1 (de) * 1978-08-03 1978-11-09 Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg Brenner fuer fluessigen oder gasfoermigen brennstoff
DE2900640C2 (de) * 1979-01-09 1984-10-04 Max Weishaupt Gmbh, 7959 Schwendi Brenner für flüssige Brennstoffe
ES2094512T3 (es) * 1992-02-28 1997-01-16 Fuellemann Patent Ag Quemador, en especial quemador de gasoleo o quemador combinado de gasoleo/gas.
WO1995016882A1 (fr) 1993-12-18 1995-06-22 Deutsche Forschungsanstalt für Luft- und Raumfahrt e.V. Bruleur a flamme bleue optimisant la combustion
DE19741508A1 (de) * 1997-08-16 1999-05-06 Buderus Heiztechnik Gmbh Mischeinrichtung
DE19737998A1 (de) * 1997-08-30 1999-03-04 Abb Research Ltd Brennervorrichtung
DE19948876C2 (de) * 1999-10-08 2003-06-26 Buderus Heiztechnik Gmbh Verfahren zum Schaffen eines homogenen Luftstroms in einem Gebläsebrenner und Gerät für seine Verwirklichung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407504A1 (de) * 1974-02-16 1975-08-28 Elco Oelbrennerwerk Ag Brennvorrichtung zum russfreien verbrennen von fluessigen brennstoffen

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Publication number Publication date
EP1489352A1 (fr) 2004-12-22
DE10327391B3 (de) 2004-12-16

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