EP0881432A2 - Brûleur pour la mise en oeuvre d'une unité pour la génération d'un gaz chaud - Google Patents

Brûleur pour la mise en oeuvre d'une unité pour la génération d'un gaz chaud Download PDF

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Publication number
EP0881432A2
EP0881432A2 EP98810340A EP98810340A EP0881432A2 EP 0881432 A2 EP0881432 A2 EP 0881432A2 EP 98810340 A EP98810340 A EP 98810340A EP 98810340 A EP98810340 A EP 98810340A EP 0881432 A2 EP0881432 A2 EP 0881432A2
Authority
EP
European Patent Office
Prior art keywords
burner
partial bodies
front plate
fuel
burner according
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Withdrawn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
EP98810340A
Other languages
German (de)
English (en)
Other versions
EP0881432A3 (fr
Inventor
Jürgen Dr. Haumann
Hans Peter Knöpfel
Christian Dr. Paschereit
Wolfgang Dr. Polifke
Thomas Prof. Dr. Sattelmayer
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.)
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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 ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Publication of EP0881432A2 publication Critical patent/EP0881432A2/fr
Publication of EP0881432A3 publication Critical patent/EP0881432A3/fr
Withdrawn legal-status Critical Current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 
    • 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
    • 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
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or liquid 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 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/40—Inducing local whirls around flame
    • 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 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/07002—Premix burners with air inlet slots obtained between offset curved wall surfaces, e.g. double cone burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2209/00—Safety arrangements
    • F23D2209/20—Flame lift-off / stability
    • 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
    • F23D2900/14—Special features of gas burners
    • F23D2900/14021—Premixing burners with swirling or vortices creating means for fuel or air

Definitions

  • the present invention relates to a burner for operating an assembly for Generation of a hot gas according to the preamble of claim 1.
  • the invention seeks to remedy this.
  • the invention as set out in the claims is characterized, the task is based on a burner at the beginning to submit proposals that address the above imperfections and to remedy shortcomings.
  • the main advantage of the invention is that the main body of the burner, as far as the formation of the critical swirl number is concerned remains unchanged. Only to remedy the disadvantages mentioned above as well to maximize flame stabilization and strengthen the output of the The burner's backflow zone will be in the area of the burner outlet Precautions to strengthen the outer stabilization area intended. Basically, this external stabilization thereby achieve that the flow of hot gases at the burner outlet in a radial Direction is influenced by the front panel so that a direct and close recirculation of hot gases in the area of the flame front under immediate Shielding of the exhaust gases from the combustion chamber, which in itself already have experienced a cooling, can take place.
  • Fig. 1 shows a premix burner in perspective.
  • Fig. 1 and Fig. 2 are used for what purpose, type and Functioning of such a burner emerge.
  • the premix burner according to FIG. 1 consists of two hollow conical partial bodies 1, 2, which are nested offset from one another, this one Premix burner operated with a gaseous and / or liquid fuel becomes.
  • Cone-shaped does not only mean the one shown here understood fixed opening angle characterized cone shape, but he also includes other configurations of the partial bodies, such as a diffuser or diffuser-like shape as well as a confuser or confuser-like shape. These forms are not specifically shown here because they are known to the person skilled in the art are well known.
  • the offset of the respective central axis or Longitudinal axis of symmetry of the partial bodies 1, 2 to one another cf.
  • the two conical partial bodies 1, 2 each have a cylindrical one Initial part 9, 10, which also, analogously to the aforementioned partial bodies 1, 2, run offset from one another, so that the tangential air inlet ducts 5, 6 are present over the entire length of the premix burner.
  • the initial part is a nozzle 11 for preferably atomizing a liquid fuel 12 housed, such that their injection in about with the narrowest cross-section of the cone cavity formed by the partial bodies 1, 2 8 coincides.
  • this nozzle 11 depends on the specified parameters of the respective premix burner.
  • the fuel 12 injected through the nozzle 1 can, if necessary be returned to a recirculated exhaust gas; then it is also possible to accomplish the complementary injection of a quantity of water through the nozzle 11.
  • the premix burner can be purely conical, i.e. without a cylindrical one Initial parts 9, 10 may be formed.
  • the sub-bodies 1, 2 also each have one Fuel line 13, 14, which runs along the tangential inlet channels 5, 6 are arranged and provided with injection openings 15, through which preferably a gaseous fuel 16 in the combustion air flowing there 7 is injected, as is symbolized by arrows 16, wherein this injection also the fuel injection level (see FIG. 2, item 22) of the Systems forms.
  • These fuel lines 13, 14 are preferably at the latest placed at the end of the tangential inflow, before entering the cone cavity 8, this to ensure an optimal air / fuel mixture.
  • the premix burner On the combustion chamber side, the premix burner has an anchorage for the partial bodies 1, 2 serving front panel 18 with a number of holes 19 through which if necessary, preferably a hot medium 20 the front part of the combustion chamber 17 or its wall is supplied.
  • the premix burner is used solely by means of a liquid Operated fuel 12, this is done via the central nozzle 11, wherein this fuel 12 then enters the cone cavity 8 at an acute angle or is injected into the combustion chamber 17.
  • the nozzle 11 thus forms a tapered fuel profile 23 rotating from the tangentially flowing Combustion air 7 is enclosed. In the axial direction, the concentration of the injected fuel 12 continuously through the incoming combustion air 7 broken down into an optimal mixture.
  • a backflow zone 24 (vortex breakdown) also forms there with one opposite the flame front 25 acting there stabilizing effect, in which Meaning that the backflow zone 24 functions as a disembodied flame holder takes over.
  • the optimal fuel concentration across the cross section is only in the area the vortex runout, that is, in the area of the backflow zone 24.
  • a stable flame front 25 is then created at this point Effect results from the swirl number in in the cone cavity 8 Flow direction along the cone axis. A backlash of the flame into that This prevents the interior of the premix burner.
  • the flow opening of the tangential Air inlet channels 6, 7 is predestined, the position of the backflow zone 24 To influence the end of the premixing section.
  • the construction of the premix burner the flow opening of the tangential is also particularly suitable To change air inlet channels 5, 6 as required, which means without changing the Length of the premix burner covers a relatively large operating range can be.
  • the partial bodies 1, 2 are also in another Plane can be shifted towards each other, which even overlaps the air inlet plane into the cone cavity 8 (see FIG. 2, item 21) of the same in the region of the tangential air inlet ducts 5, 6, as can be seen from FIG. 2, can be accomplished. It is then also possible for the partial body 1, 2 to be spirally nested into one another by a counter-rotating movement.
  • the premix burner is not open the number shown is limited. A larger number is displayed there, for example, when it comes to making the premixing wider, or the Swirl number and thus the dependent formation of the backflow zone 24 by to influence a larger number of air inlet ducts accordingly.
  • Premix burners of the type described here are also those which are to be achieved a swirl flow from a cylindrical or quasi-cylindrical tube go out, the inflow of combustion air into the interior of the pipe tangential air inlet channels is also accomplished, and inside of the tube a conical body with decreasing in the flow direction Cross section is arranged, which is also critical with this configuration Swirl number at the output of the burner can be achieved.
  • the front panel 18 has on it flank-side circumference on an attached ring 27, which is bent is directed in such a way that the flame front 25 through this Ring 27 is encased.
  • the axial extent as well as the degree of the angle of the Biasing depends on the respective operating needs.
  • FIG. 2 shows the same premix burner according to FIG. 1, but from a different one Perspective and in a simplified representation.
  • This Fig. 2 is essentially serve the configuration of this premix burner as well as the design and placement of the baffles better resp. to capture properly.
  • This Dislocation in itself induces the size of the flow openings of the tangential Air inlet ducts 5, 6.
  • the respective central axes 3, 4 run parallel here to each other.
  • On the design of the stabilization ring 27 in the area of Front plate 18 has already been discussed in more detail in FIG. 1.
EP98810340A 1997-05-26 1998-04-20 Brûleur pour la mise en oeuvre d'une unité pour la génération d'un gaz chaud Withdrawn EP0881432A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997121937 DE19721937B4 (de) 1997-05-26 1997-05-26 Vormischbrenner zum Betrieb eines Aggregates zur Erzeugung eines Heissgases
DE19721937 1997-05-26

Publications (2)

Publication Number Publication Date
EP0881432A2 true EP0881432A2 (fr) 1998-12-02
EP0881432A3 EP0881432A3 (fr) 1999-06-16

Family

ID=7830507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810340A Withdrawn EP0881432A3 (fr) 1997-05-26 1998-04-20 Brûleur pour la mise en oeuvre d'une unité pour la génération d'un gaz chaud

Country Status (2)

Country Link
EP (1) EP0881432A3 (fr)
DE (1) DE19721937B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1217295A2 (fr) 2000-12-23 2002-06-26 ALSTOM Power N.V. Brûleur pour la génération d'un gaz chaud
US7241138B2 (en) 2001-12-24 2007-07-10 Alstom Technology Ltd. Burner with stepped fuel injection
US7871262B2 (en) * 2004-11-30 2011-01-18 Alstom Technology Ltd. Method and device for burning hydrogen in a premix burner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0321809A1 (fr) 1987-12-21 1989-06-28 BBC Brown Boveri AG Procédé pour la combustion de combustible liquide dans un brûleur

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806517A (en) * 1950-11-16 1957-09-17 Shell Dev Oil atomizing double vortex burner
US3174526A (en) * 1960-08-23 1965-03-23 Linde Robert Albert Von Atomizing burner unit
DE2517756A1 (de) * 1975-04-22 1976-11-04 Christian Coulon Verfahren und einrichtung zum zerstaeuben und verbrennen von fluessigen brennstoffen
EP0210462B1 (fr) * 1985-07-30 1989-03-15 BBC Brown Boveri AG Chambre de combustion double
WO1989011065A1 (fr) * 1988-05-12 1989-11-16 Sundstrand Corporation Moteur a turbine
DE3906854C1 (en) * 1989-03-03 1990-10-31 Buderus Heiztechnik Gmbh, 6330 Wetzlar, De Burner tube for a blue-burning oil burner
CH680157A5 (fr) * 1989-12-01 1992-06-30 Asea Brown Boveri
GB2262981B (en) * 1991-12-30 1995-08-09 Ind Tech Res Inst Dual fuel low nox burner
US5307634A (en) * 1992-02-26 1994-05-03 United Technologies Corporation Premix gas nozzle
WO1995013502A1 (fr) * 1993-11-08 1995-05-18 Ivo International Oy Procede et appareil pour bruler un combustible pulverise
DE19537636B4 (de) * 1995-10-10 2004-02-12 Alstom Kraftwerksanlage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0321809A1 (fr) 1987-12-21 1989-06-28 BBC Brown Boveri AG Procédé pour la combustion de combustible liquide dans un brûleur

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1217295A2 (fr) 2000-12-23 2002-06-26 ALSTOM Power N.V. Brûleur pour la génération d'un gaz chaud
US6773257B2 (en) 2000-12-23 2004-08-10 Alstom Technology Ltd Burner for the production of a hot gas
US7241138B2 (en) 2001-12-24 2007-07-10 Alstom Technology Ltd. Burner with stepped fuel injection
US7871262B2 (en) * 2004-11-30 2011-01-18 Alstom Technology Ltd. Method and device for burning hydrogen in a premix burner

Also Published As

Publication number Publication date
DE19721937B4 (de) 2008-12-11
EP0881432A3 (fr) 1999-06-16
DE19721937A1 (de) 1998-12-03

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