EP1916475A2 - Mélangeur de brûleur à gas ou à huile - Google Patents

Mélangeur de brûleur à gas ou à huile Download PDF

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Publication number
EP1916475A2
EP1916475A2 EP07019499A EP07019499A EP1916475A2 EP 1916475 A2 EP1916475 A2 EP 1916475A2 EP 07019499 A EP07019499 A EP 07019499A EP 07019499 A EP07019499 A EP 07019499A EP 1916475 A2 EP1916475 A2 EP 1916475A2
Authority
EP
European Patent Office
Prior art keywords
combustion air
mixing device
diaphragm
cone
fuel nozzle
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.)
Withdrawn
Application number
EP07019499A
Other languages
German (de)
English (en)
Other versions
EP1916475A3 (fr
Inventor
Gregor Szczyra
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 EP1916475A2 publication Critical patent/EP1916475A2/fr
Publication of EP1916475A3 publication Critical patent/EP1916475A3/fr
Withdrawn legal-status Critical Current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
    • F23D11/402—Mixing chambers downstream of the nozzle
    • 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 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • 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
    • F23D11/404—Flame tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
    • 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
    • F23D2900/11402—Airflow diaphragms at burner nozzle

Definitions

  • the invention relates to a mixing device for an oil or gas burner according to the preamble of claim 1.
  • An oil burner is for example from the EP 0 683 883 B1 known. It consists of a burner housing, which has a support tube with an arranged in this prechamber and an adjoining flame tube. In the support tube, a nozzle with a fuel jet nozzle is arranged in the prechamber, and in the flame tube, the fuel jet spreads. Between the pre-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. 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 shows DE 197 41 508 A1 a mixing device for an oil or gas burner with a parallel to the diaphragm aligned, disc-like perforated plate element to equalize the combustion air flow upstream of the diaphragm. This extends over the entire cross section of the combustion air duct and is flowed through in the axial direction.
  • the invention has for its object to provide a compact constructed mixing device for an oil or gas burner and to optimize the quality of combustion and robustness in different operating conditions.
  • the mixing device for an oil or gas burner is characterized in that the diaphragm has a single central, arranged coaxially with the fuel nozzle flow opening for the combustion air. Through this flow opening, a first inner combustion air stream surrounding the fuel nozzle and a second outer combustion air stream surrounding the inner combustion air pass through.
  • the two combustion air streams are divided at the distribution device. For this purpose, upstream of the diaphragm, coaxial with the fuel nozzle, a tapering towards the aperture, arranged with its base emanating from the manifold cone.
  • the distributor device preferably consists of a disc-shaped perforated plate.
  • the cone is fixed with its base on the distributor device and opens out in the region of the diaphragm so that an annular gap is formed both towards the edge of the flow opening in the diaphragm and towards the fuel nozzle. It is advantageous if the cone encloses approximately an angle of 70 ° to 130 ° and the radius of its base corresponds at most to half the radius of the distributor device.
  • the cone has a closed lateral surface.
  • the cone but also have a perforated surface provided with openings.
  • the openings on the lateral surface of the cone are preferably designed slit-like and aligned approximately axially.
  • the openings on the lateral surface may protrude as fan-shaped exhibitions with tabs in the outer combustion air duct and optionally have a spin-generating effect.
  • Flow cross sections and flow resistances are selected according to the invention such that the first inner combustion air flow surrounding the fuel nozzle is smaller than the second outer, the inner surrounding combustion air flow.
  • the free cross-section of the flow opening for the combustion air in the first inner combustion air duct surrounding the fuel nozzle is smaller than in the outer combustion air duct.
  • the tip of the cone opens approximately at the level of the flow opening in the aperture or at a distance upstream of the inside of the aperture.
  • the distributor and Strömungsleit adopted in the Ausmündungs Scheme of the combustion air duct are inventively designed very simple, so that a cost-effective, easy to produce overall construction for the mixing device is formed.
  • the arrangement is very maintenance and cleaning friendly.
  • 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, just behind a diaphragm 4 with a flow opening 5 for the combustion air, mounted on a so-called nozzle 6.
  • the combustion air flow is conveyed into the housing 7 or through the distributor device 8 in the form of a disk-shaped perforated plate to the aperture 4.
  • the combustion air flow is split at the distributor device 8 into a first inner and a second outer partial flow. Both coaxial partial flows are in the range the confluence of the fuel nozzle 3 again brought together close to the fuel jet and pass through the flow opening 5 therethrough.
  • a cone 9 is fixed to the distribution device 8 with its base and opens in the region of the aperture 4 at a distance from the edge of the flow opening 5 and to the fuel nozzle 3.
  • the cone 9 can according to FIG. 1 have a closed lateral surface or according to FIG. 2 a perforated surface 10 provided with openings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
EP07019499A 2006-10-19 2007-10-05 Mélangeur de brûleur à gas ou à huile Withdrawn EP1916475A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610049294 DE102006049294A1 (de) 2006-10-19 2006-10-19 Mischeinrichtung für einen Öl- oder Gasbrenner

Publications (2)

Publication Number Publication Date
EP1916475A2 true EP1916475A2 (fr) 2008-04-30
EP1916475A3 EP1916475A3 (fr) 2008-12-10

Family

ID=38654782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07019499A Withdrawn EP1916475A3 (fr) 2006-10-19 2007-10-05 Mélangeur de brûleur à gas ou à huile

Country Status (2)

Country Link
EP (1) EP1916475A3 (fr)
DE (1) DE102006049294A1 (fr)

Families Citing this family (1)

* 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

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1495966A (fr) * 1966-10-06 1967-09-22 American Radiator & Standard Brûleur à mazout
DE8200657U1 (de) * 1982-01-14 1983-02-24 Thermostar Heisler + Leins oHG Heizungs-und Klimatechnik, 7250 Leonberg Oelvergasungsbrenner
AT401288B (de) * 1991-10-14 1996-07-25 Schwarz A & Co Mischeinrichtung für ölbrenner
DE4208849A1 (de) * 1992-03-19 1993-09-23 Broetje August Gmbh & Co Oelgeblaesebrenner
EP0646750A1 (fr) * 1993-10-05 1995-04-05 Abb Research Ltd. Procédé de pulvérisation d'un combustible liquide dans une buse de pulvérisation
WO1995016882A1 (fr) * 1993-12-18 1995-06-22 Deutsche Forschungsanstalt für Luft- und Raumfahrt e.V. Bruleur a flamme bleue optimisant la combustion
DE29508424U1 (de) * 1995-05-20 1996-09-19 Elco Energiesysteme AG, Vilters, St. Gallen Brenner
DE29518919U1 (de) * 1995-11-29 1996-01-25 MEKU Metallverarbeitungs-GmbH, 78083 Dauchingen Mischeinrichtung für einen Brenner
DE19604347A1 (de) * 1996-02-07 1997-08-14 Koerting Ag Brenner für flüssigen oder gasförmigen Brennstoff, insbesondere für Öl
DE19741508A1 (de) * 1997-08-16 1999-05-06 Buderus Heiztechnik Gmbh Mischeinrichtung
EP1243850B1 (fr) * 2001-03-20 2007-10-03 Riello S.p.a. Brûleur à mazout

Also Published As

Publication number Publication date
EP1916475A3 (fr) 2008-12-10
DE102006049294A1 (de) 2008-04-24

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