EP0404731A2 - Brenner mit torisch-drallförmiger Strömung für einen mit flüssigem und gasförmigem Brennstoff beheitzten Kessel - Google Patents

Brenner mit torisch-drallförmiger Strömung für einen mit flüssigem und gasförmigem Brennstoff beheitzten Kessel Download PDF

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Publication number
EP0404731A2
EP0404731A2 EP90810471A EP90810471A EP0404731A2 EP 0404731 A2 EP0404731 A2 EP 0404731A2 EP 90810471 A EP90810471 A EP 90810471A EP 90810471 A EP90810471 A EP 90810471A EP 0404731 A2 EP0404731 A2 EP 0404731A2
Authority
EP
European Patent Office
Prior art keywords
burner
sleeve
burner according
nozzle
flow
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.)
Granted
Application number
EP90810471A
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English (en)
French (fr)
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EP0404731B1 (de
EP0404731A3 (de
Inventor
Rudolf Müller
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Individual
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Individual
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Publication of EP0404731A3 publication Critical patent/EP0404731A3/de
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Publication of EP0404731B1 publication Critical patent/EP0404731B1/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
    • 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
    • F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in 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, e.g. burner cooling means, noise reduction means
    • F23D11/40—Mixing tubes or chambers; 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 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/40—Inducing local whirls around flame

Definitions

  • the present invention relates to a toric-cyclonic flow burner for a liquid and gaseous fuel boiler comprising a tubular body, composed of an outer bushing and an inner bushing mounted coaxially with the outer bushing, a fuel supply nozzle disposed coaxially inside these sockets and ignition electrodes, in which the inner socket and the outer socket define between them an annular space provided with a narrowed circular opening which opens at the front of the burner.
  • Burners of this type often make it possible to achieve a marked improvement in combustion, without however achieving the expected results, and in particular nitrogen oxide and carbon dioxide levels low enough for the exhaust gases to be released. below the tolerances set by the current standards in force and in preparation for the future.
  • the first phase consists in starting the combustion using a rich mixture and the second phase consists in carrying out this combustion under conditions approaching the stoichiometric conditions.
  • the second phase consists in carrying out this combustion under conditions approaching the stoichiometric conditions.
  • optimum combustion is only possible if the fuel is in the form of extremely fine particles.
  • the burners known to date do not generally allow optimal reconciliation of the various parameters so that the results of the analyzes of the combustion gases generally result in values which are above the threshold admissible by current and future regulations. , or there are often oscillations of the flame and fouling of the device, or they are exorbitantly expensive.
  • the present invention proposes to overcome these various drawbacks by providing a burner of relatively simple and economical construction, which makes it possible to create a toric-cyclonic flow with direct recycling of the combustion gases, which has the effect of obtaining an extremely fine division. fuel particles, a stratified mixture of fuel and oxidizer, in this case air, efficient recycling of the combustion gases and, thereafter, a residence time of the gases in the burner long enough for the residues unburned are almost nonexistent.
  • the burner according to the invention characterized in that the inner sleeve is closed at the rear of the nozzle by a hermetic closure plate, in that it comprises at the front of the nozzle a deflector plate provided a central orifice and radial slots cut along planes inclined with respect to the plane of the plate, in that the side wall of this inner sleeve is provided with at least one opening arranged to generate a primary flow of supply of oxidizing gas emerging under said deflecting plate, and in that at least one ring of inclined blades is disposed in the annular space formed between the inner sleeve and the outer sleeve, upstream of said narrowed opening, for twisting a secondary flow d oxidant gas supply.
  • the burner has a surface for guiding the primary feed flow, this surface being disposed between the closure plate of the inner bushing and the deflector plate, and being provided with a central orifice disposed opposite from the central hole in the deflector plate.
  • said guide surface is arranged to define with the deflecting plate a narrowed annular passage surrounding the central orifice of this plate, for the primary flow of supply of oxidizing gas.
  • said guide surface is conical.
  • the outer sleeve has a cylindrical upstream part and a downstream part, disposed at the front of the nozzle, having a conical surface whose generatrices converge at the front of the nozzle, on the axis of the latter.
  • This burner can also include a flue gas recycling sleeve, mounted at the front of the nozzle, this sleeve being fixed to the downstream end of the outer bushing.
  • this sleeve to the outer sleeve is done by means of an annular part arranged in a plane perpendicular to the axis of this burner.
  • the inner sleeve is equipped with an oxidizing gas supply conduit connecting the annular space (E) and the interior of this annular sleeve, so as to divert part of the supply flow in oxidant gas towards the ignition electrodes.
  • Said inner bushing can be fixed to the outer bushing by at least three tabs arranged in diametrical planes and preferably by a ring of tabs also regularly arranged in diametrical planes.
  • FIGURE 1 represents a schematic view partially in axial section of a preferred embodiment of a domestic or industrial burner according to the invention
  • the burner shown essentially comprises a tubular body composed of an outer bush 10, substantially cylindrical and of an outer bush 12 disposed coaxially with the outer bush 10. Inside the inner bush 12 is mounted a nozzle 11, arranged coaxially with the inner 12 and outer sockets 10. These two sockets are arranged so as to delimit between them an annular space E, the role of which will be explained below.
  • the inner sleeve 12 is closed at its upstream end by a hermetic closure plate 14 and at its downstream or front end by a deflector plate 18 comprising a central opening 19 and a series of radial slots 16 which are arranged in planes inclined relative to in the plane of the plate. In practice, these slots can be cut obliquely in the plate, or the plate itself can be composed of fins 17 which overlap in part to define said inclined slots.
  • the lateral part of the inner sleeve 12 comprises at least one opening 15, but preferably a series of regularly spaced openings and arranged on a circular line to ensure the passage of a primary flow of supply of oxidizing gas opening upstream of said deflector plate.
  • This feed flow illustrated by the arrows A comes from a blower or a fan (not shown) placed at the rear of the burner and which sends air into the annular space E from upstream to downstream. Since the inner sleeve 12 is closed, this space is the only possible passage for the air flow generated by the fan.
  • the primary flow A is guided towards the central orifice 19 of the deflector plate 1 and towards the radial slots 16 by a guide surface 20 which is preferably conical and which has at its apex an orifice 21 disposed opposite the orifice 19.
  • the base of this surface is fixed to the side wall 24 of the inner sleeve 12.
  • the edges of the orifice 21 define with the edges of the orifice 19 an annular passage of narrowed section 9 forming a constriction through which the air of the primary feed stream, which feeds the jet of fuel ejected by the nozzle 11 and which protects the latter against heat and fouling by forming a protective screen, is accelerated.
  • this inner bushing 12 extends beyond the deflector plate 18 by an annular rim 25 which, in its end region 26, is curved towards the axis of the burner. Furthermore, the outer sleeve 10 is extended towards the front of the burner by a downstream part 27 constituted by a conical surface which forms with the flange 25 an annular passage 28 extending the annular space E and opening downstream of the nozzle by an opening. narrowed circular 29.
  • This annular passage 28 is crossed by a secondary flow of oxidant gas supply represented by the arrows B.
  • This secondary flow B of oxidant gas supply also comes from the fan and is channeled by the annular space E. This secondary flow B partially corresponds to the balance of the total flow generated by the fan after separation of the primary flow A.
  • the inner sleeve 12 also comprises an intermediate plate 22, parallel to the closure plate 14 and used to hold or fix the ignition electrodes 23 (only one of which is shown in the figure), and a tube observation 40 equipped with a photoelectric cell 41
  • the inner sleeve 12 is fixed to the outer sleeve 10 by at least three fixing lugs 13 and preferably by a crown of regularly spaced lugs. These legs are arranged according to diametrical planes. Said crown is preferably mounted near the upstream end of the side wall 24 of the inner sleeve
  • a ring of inclined blades 42 is mounted in the annular space E downstream of the ring of fixing lugs 13.
  • the purpose of these blades is to twist the secondary flow B of supply of oxidizing gas and to generate the cyclonic effect at the front of the nozzle.
  • the purpose of these blades is to give the gas flow B a component of rotation about the axis of the injector. This effect is also supplemented by the passage of the primary flow through the slots 16.
  • the effect obtained has the consequences: - better homogeneity of the mixture, an increase in the residence time of the fuel mixture in the combustion zone, - better recycling of combustion gases.
  • a conduit 43 for supplying oxidant gas, preferably air, is mounted on the inner sleeve 12 to connect the annular space E and the interior of this sleeve, so as to divert part of the supply flow in oxidizing gas in the direction of the ignition electrodes 23.
  • the breath of air generated through this duct deflects the ignition arc produced between the electrodes towards the nozzle 11.
  • the toric-cyclonic effect schematically represented by the drawing of curves and arrows 33 is obtained by the combination of several effects.
  • a first effect is obtained by the injection of droplets of fuel in the opposite direction of rotation of the toric-cyclonic vortex.
  • a second effect being caused by the primary supply of oxidizing gas which takes place, at a low speed, through openings 15 and the slots 16 formed between the inclined fins 17 of the deflector plate 18. These fins inclined at a predetermined angle cause an air penetration corresponding to the primary supply according to a set of vortex currents encircling the flow of fuel fluid. Part of the primary flow is used to form a screen protecting the nozzle 11 against heat and fouling.
  • the secondary supply of oxidizing gas corresponding to flow B passes through the annular channel and enters the space located in front of the deflector plate 18 through the mouth 29. Due to the constriction, the air entering this zone passes through. the channel and is greatly accelerated.
  • the deflection obtained thanks to the existence of the flanges 25 and 27 generates an enveloping current which creates a cyclonic zone and in very stable toroidal rotation in the vicinity of the deflector plate.
  • the component of rotation generated by the blades 42 promotes the specific dynamics of the gas flow in this area.
  • This toric-cyclonic zone makes it possible to improve the division of the fuel fluid particles and to homogenize very effectively the fuel / oxidizer mixture.
  • combustion thanks to the heat it gives off, causes vaporization of fine particles of fuel which, thanks to turbulence, mix with a predetermined amount of air.
  • the fuel is considered to have the formula CxHy where x and y have different values distributed over a determined range.
  • the air consists essentially of a mixture of 21% oxygen and approximately 78% nitrogen, 1% argon and some traces of carbon dioxide and other gases.
  • the HOO peroxide radical also reacts as a dehydrogenator on the fuel according to the relationship: HOO. + CxHy ----> HO. + .OH + .CxH (y-1) while the HOO ion generates an oxidation reaction according to the relation: CxHy + OOH ----> CxH (y-1) - O + .OH
  • the present invention is not limited to the embodiments described, but can undergo different modifications and come in various variants obvious to those skilled in the art.
  • the number of inclined blades, or crowns of blades is not limited. That of the slots 16 can be increased or decreased and the dimensions of the various openings for the passage of the oxidizing gas supply streams can be modified.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
EP90810471A 1989-06-22 1990-06-22 Brenner mit torisch-drallförmiger Strömung für einen mit flüssigem und gasförmigem Brennstoff beheitzten Kessel Expired - Lifetime EP0404731B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8908585A FR2648897A1 (fr) 1989-06-22 1989-06-22 Bruleur a flux torique-cyclonique pour chaudiere a combustible liquide et gazeux
FR8908585 1989-06-22

Publications (3)

Publication Number Publication Date
EP0404731A2 true EP0404731A2 (de) 1990-12-27
EP0404731A3 EP0404731A3 (de) 1992-01-02
EP0404731B1 EP0404731B1 (de) 1995-01-25

Family

ID=9383188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810471A Expired - Lifetime EP0404731B1 (de) 1989-06-22 1990-06-22 Brenner mit torisch-drallförmiger Strömung für einen mit flüssigem und gasförmigem Brennstoff beheitzten Kessel

Country Status (4)

Country Link
EP (1) EP0404731B1 (de)
AT (1) ATE117788T1 (de)
DE (1) DE69016281T2 (de)
FR (1) FR2648897A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0537491A2 (de) * 1991-10-14 1993-04-21 A. Schwarz + Co. Mischeinrichtung für Ölbrenner
ES2060486A2 (es) * 1991-11-11 1994-11-16 Munoz Jose Domingo Perfeccionamientos en los quemadores de combustibles liquidos y su procedimiento de funcionamiento.
EP0864812A3 (de) * 1997-03-12 1999-06-16 A. Schwarz + Co. Mischeinrichtung für Gas- und Ölbrenner
AT406706B (de) * 1997-03-12 2000-08-25 Schwarz A & Co Brenner für gas- und ölheizkessel
AT406795B (de) * 1997-12-15 2000-09-25 Schwarz A & Co Brenner für gas- und ölheizungskessel
CN104373963A (zh) * 2014-10-28 2015-02-25 北京华清燃气轮机与煤气化联合循环工程技术有限公司 一种燃气轮机燃烧室中心体开槽旋流喷嘴
CN109237465A (zh) * 2018-10-30 2019-01-18 北京巴布科克·威尔科克斯有限公司 一种旋流燃烧器及旋流燃烧器乏风喷入***

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012101577A1 (de) 2012-02-27 2013-08-29 Webasto Ag Mobiles, mit flüssigem Brennstoff betriebenes Heizgerät
DE102012101580B4 (de) 2012-02-27 2020-10-29 Webasto Ag Mobiles, mit flüssigem Brennstoff betriebenes Heizgerät
DE102012110506B4 (de) * 2012-11-02 2017-04-27 Webasto SE Hochdruckzerstäubungsbrenneranordnung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531538A (en) * 1948-05-06 1950-11-28 Cecil W Smith Air control unit for oil burners
FR2202580A5 (de) * 1972-10-06 1974-05-03 Ofr Officine Fratelli Riello S
FR2348439A1 (fr) * 1976-04-12 1977-11-10 Zaegel Held Sa Bruleur pour combustibles en particulier pour combustibles liquides et gazeux
DE2623759A1 (de) * 1976-05-26 1977-12-01 Kloeckner & Co Druckzerstaeuber-oelbrenner
DE2624649A1 (de) * 1976-06-02 1977-12-15 Danfoss As Oelbrenner
DE2821932A1 (de) * 1978-05-19 1979-11-22 Karl Bodemer Mischeinrichtung zur verbrennung von fluessigen kohlenwasserstoffen, insbesondere heizoel und dieseloel
WO1986007434A1 (fr) * 1985-06-04 1986-12-18 Mueller Rudolf Bruleur pour chaudiere a combustible liquide avec circuit de recyclage des gaz de combustion
DE3542174C1 (en) * 1985-11-29 1987-07-02 Electro Oil Gmbh Mixing device for oil burners

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE556701A (de) *
GB851900A (en) * 1958-02-28 1960-10-19 Auto Comb S London Ltd Improvements in pressure jet oil fuel burners
US3033278A (en) * 1958-12-22 1962-05-08 Gulf Research Development Co Air directing apparatus
FR1332961A (fr) * 1962-08-31 1963-07-19 Oelfeuerungen Ag Tête de brûleur avec dispositif de gazéification de l'huile
CH670297A5 (de) * 1986-02-13 1989-05-31 Schilling Siegfried W
DE8604089U1 (de) * 1986-02-15 1986-04-03 Klöckner & Co KGaA Zweigniederlassung Hechingen, 7450 Hechingen Mischeinrichtung für einen Gas- und Ölbrenner

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531538A (en) * 1948-05-06 1950-11-28 Cecil W Smith Air control unit for oil burners
FR2202580A5 (de) * 1972-10-06 1974-05-03 Ofr Officine Fratelli Riello S
FR2348439A1 (fr) * 1976-04-12 1977-11-10 Zaegel Held Sa Bruleur pour combustibles en particulier pour combustibles liquides et gazeux
DE2623759A1 (de) * 1976-05-26 1977-12-01 Kloeckner & Co Druckzerstaeuber-oelbrenner
DE2624649A1 (de) * 1976-06-02 1977-12-15 Danfoss As Oelbrenner
DE2821932A1 (de) * 1978-05-19 1979-11-22 Karl Bodemer Mischeinrichtung zur verbrennung von fluessigen kohlenwasserstoffen, insbesondere heizoel und dieseloel
WO1986007434A1 (fr) * 1985-06-04 1986-12-18 Mueller Rudolf Bruleur pour chaudiere a combustible liquide avec circuit de recyclage des gaz de combustion
DE3542174C1 (en) * 1985-11-29 1987-07-02 Electro Oil Gmbh Mixing device for oil burners

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0537491A2 (de) * 1991-10-14 1993-04-21 A. Schwarz + Co. Mischeinrichtung für Ölbrenner
EP0537491A3 (en) * 1991-10-14 1993-06-30 A. Schwarz + Co. Mixing device for oil burner
AT401288B (de) * 1991-10-14 1996-07-25 Schwarz A & Co Mischeinrichtung für ölbrenner
ES2060486A2 (es) * 1991-11-11 1994-11-16 Munoz Jose Domingo Perfeccionamientos en los quemadores de combustibles liquidos y su procedimiento de funcionamiento.
EP0864812A3 (de) * 1997-03-12 1999-06-16 A. Schwarz + Co. Mischeinrichtung für Gas- und Ölbrenner
AT406706B (de) * 1997-03-12 2000-08-25 Schwarz A & Co Brenner für gas- und ölheizkessel
AT406795B (de) * 1997-12-15 2000-09-25 Schwarz A & Co Brenner für gas- und ölheizungskessel
CN104373963A (zh) * 2014-10-28 2015-02-25 北京华清燃气轮机与煤气化联合循环工程技术有限公司 一种燃气轮机燃烧室中心体开槽旋流喷嘴
CN109237465A (zh) * 2018-10-30 2019-01-18 北京巴布科克·威尔科克斯有限公司 一种旋流燃烧器及旋流燃烧器乏风喷入***
CN109237465B (zh) * 2018-10-30 2024-03-19 北京巴布科克·威尔科克斯有限公司 一种旋流燃烧器及旋流燃烧器乏风喷入***

Also Published As

Publication number Publication date
EP0404731B1 (de) 1995-01-25
EP0404731A3 (de) 1992-01-02
FR2648897A1 (fr) 1990-12-28
ATE117788T1 (de) 1995-02-15
DE69016281T2 (de) 1995-07-20
DE69016281D1 (de) 1995-03-09

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