EP0979972A1 - Ensemble de brûleur avec un brûleur principal et un brûleur pilote et brûleur pilote pour cet ensemble - Google Patents

Ensemble de brûleur avec un brûleur principal et un brûleur pilote et brûleur pilote pour cet ensemble Download PDF

Info

Publication number
EP0979972A1
EP0979972A1 EP98810775A EP98810775A EP0979972A1 EP 0979972 A1 EP0979972 A1 EP 0979972A1 EP 98810775 A EP98810775 A EP 98810775A EP 98810775 A EP98810775 A EP 98810775A EP 0979972 A1 EP0979972 A1 EP 0979972A1
Authority
EP
European Patent Office
Prior art keywords
burner
pilot
axis
pilot burner
main
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Withdrawn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
EP98810775A
Other languages
German (de)
English (en)
Inventor
Jakob Prof. Dr. Keller
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 Asea Brown Boveri Ltd
ABB AB
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Priority to EP98810775A priority Critical patent/EP0979972A1/fr
Publication of EP0979972A1 publication Critical patent/EP0979972A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
    • F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
    • F23R3/34—Feeding into different combustion zones
    • F23R3/343—Pilot flames, i.e. fuel nozzles or injectors using only a very small proportion of the total fuel to insure continuous combustion
    • 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
    • F23D2900/00014—Pilot burners specially adapted for ignition of main burners in furnaces or gas turbines

Definitions

  • the present invention relates to the field of burner technology. she relates to a burner arrangement, in particular for the combustion chamber of a gas turbine, which burner arrangement has at least one pilot burner with a first one Burner axis and at least one main burner with a second burner axis includes which main burner the pilot burner is assigned to.
  • the invention further relates to a pilot burner for such a burner arrangement.
  • pilot burners for the burners of gas turbines are a problem that has not yet been satisfactorily solved. It has not yet been taken into account that the requirements for the pilot burner differ significantly from those which are placed on the associated main burner.
  • the classic arrangement of main and pilot burners is concentric. The pilot burners can therefore be operated with a comparatively low fuel mass flow and relatively low exhaust gas values with regard to CO and UHC. On the other hand, it seems comparatively difficult to achieve a safe cross-ignition at low fuel mass flows.
  • the exhaust gas values with regard to NOx are also not particularly low.
  • the arrangement of pilot fuel injectors around the main burner generally does not give satisfactory results because the interaction between adjacent burners leads to extremely unstable conditions for the pilot fuel injection.
  • the problems with conventional pilot burner arrangements can be summarized as follows in a table:
  • the object is achieved in a burner arrangement of the type mentioned solved that the pilot burner and the main burner with their burner axes arranged perpendicular to a burner level next to each other in the burner level and that the pilot burner produces a flow of hot gases that essentially in a plane parallel to the burner plane to the main burner spreads out.
  • a first preferred embodiment of the invention is characterized in that that the hot gases of the pilot burner radially to the burner axis spread. This can be easily achieved by the pilot burner creates a highly subcritical vortex.
  • a second preferred embodiment is characterized in that the Main burner and the pilot burner rotating around the respective burner axis Generate flow, and that the sense of rotation is opposite to both flows is. As a result, at the same time adequate cross-ignition properties the influence of the main burner on the pilot burner is kept low.
  • Another preferred embodiment that leads to correspondingly good results is characterized in that there are at least two main burners are that the pilot burner is symmetrical between the two main burners is arranged that the main burner and the pilot burner one around each Torch axis generate rotating flow, and that the sense of rotation the flows of all burners are rectified.
  • the pilot burner according to the invention is characterized in that it has a Configuration, based on which the hot ones generated by the pilot burner Gases essentially in a perpendicular to a burner axis Spread the plane in the radial direction away from the burner axis and in particular rotate around the burner axis.
  • pilot burner is in a direction perpendicular to the Burner axis standing plane a plurality of on a circle around the burner axis has arranged outlet openings, through which outlet openings a mixture of gaseous fuel and air in the tangential direction in the plane emanates.
  • the pilot burner has a torch axis in the form of a ring enclosing burner head, the outlet openings of Air inlet channels formed, which in the tangential direction from the outside to the inside run through the burner head and at an acute angle into one on the top of the burner head located nozzle plane, and is within the Burner head provided a concentrically circulating gas distribution line, which communicates with the air inlet ducts through gas inflow openings.
  • the pilot burner has a plurality from lying in one plane, extending radially outward from the burner axis Burner arms on, from which laterally in a uniform sense of rotation the fuel-air mixture emerges into the plane, in particular from a central gas feed pipe the fuel is connected radially in gas inflow pipes running in the burner arms get into the burner arms and exits through gas outlet openings distributed over the length of the burner arms, and means are provided in the burner arms, by means of which the emerging Fuel mixed with air entering the side of the burner arms and that Mixture is ejected laterally.
  • Fig. 1 are the basic in a perspective, schematic view Flow conditions in a pilot burner 10, as in the context of Invention is used, shown.
  • the flow 11 approaches the pilot burner 10 along the burner axis 12 and leaves the pilot burner in a radial Direction in one plane (the burner plane) that is perpendicular to the burner axis 12 stands.
  • These flow conditions are e.g. by doing that a vertebral body is used for the pilot burner, which has a strongly subcritical Vortex generated.
  • the swirl number is the Flow so large that the swirl tube collapses Bladder pushed into the burner level and becomes very large in diameter.
  • the burner area in the burner level is mainly caused by the combustion air self-cooling while the burner level is outside the pilot burner To avoid overheating, it must be well-cooled.
  • FIG. 2 A first preferred embodiment for a pilot burner with pilot lights spreading radially in one plane or are called Gasing is in Fig. 2 in the top view from above and in Fig. 4 in the side view reproduced.
  • the burner head 14 of the pilot burner 13 from FIGS. 2 and 3 is a plurality of tangential axles in a circle around the burner axis 12 oriented air inlet channels 17, into which air enters from outside, and a fuel-air mixture through the outlet openings 18 lying in a nozzle plane 15 Inject into the nozzle level 15 or burner level.
  • the premix the air with the gaseous fuel happens through that an annular, concentric gas distribution line 16 which is below the air inlet ducts 17 runs in the burner head 14, the fuel to the air inlet channels 17 brought up and through gas inflow openings, 19 which the air inlet channels 17 Connect to the gas distribution line 16, injected into the air inlet channels 17 becomes.
  • the resulting flow shown in Fig. 2 by the Arrows is indicated, rotates radially around the burner axis 12 in the Burner level outwards.
  • FIG. 4 An alternative exemplary embodiment of a suitable pilot burner is shown in FIG. 4 in the top view reproduced from above.
  • This pilot burner 20 corresponds to the Mode of operation of a double-cone burner, as described, for example, in EP-B1-0 321 809 is described, but with an opening angle of the cone of 180 °.
  • the pilot burner 20 has a plurality of in one plane (the burner plane) lying radially extending outward from the burner axis 12 Burner arms 21 on. From these burner arms 21 emerges (in FIG. 4 indicated by the groups of arrows) laterally in a uniform sense of rotation the fuel-air mixture generated in the burner arms 21 in the Level off.
  • the fuel passes from a central gas supply pipe 25 through connected, Gas inflow tubes 22 in radially extending in the burner arms 21 the burner arms 21.
  • the fuel passes there from the gas outlet openings 26 distributed the length of the burner arms 21.
  • baffles 23, 24 are provided in the burner arms 21 according to FIG. by means of which between the flow guide plates 23, 24 from the Gas inflow pipes 22 with fuel emerging laterally into the burner arms 21 entering air mixes and the mixture on the opposite side is ejected laterally. While with the above Double cone burners only Two air inlet slots are present in the pilot burner according to FIG. 4 a larger number of air inlet slots, in the example shown there are eight, preferred.
  • pilot burners 13 and 20 shown in FIGS. 2 and 4 are obvious: Because of the layer-like flame in the burner level the comparatively small fuel mass flow, which is typical for pilot burners, be limited to a small volume. The ones produced by the pilot burners hot gases spread over a large area around those of the main burners generated swirling rays around. For this reason there is one good ignition of the main burner by the pilot burner as well as good cross-ignition between the pilot burners. Furthermore, the NOx emissions be kept low during pilot operation due to premixing.
  • Fig. 6 in the view of the burner level and in Fig. 7 in the Side view is reproduced by an arrangement of (as a double cone burner trained) main burner 28 and pilot burner 13 and 20 in the Burner level 30, in which arrangement the main burner 28 and the pilot burner 13 and 20 each rotating around the respective burner axis 29 or 12 Generate flow, and the sense of rotation of both flows opposite is a slight disturbance of the pilot burners 13 and 20 by the main burners 28 can be achieved. Likewise, good cross-ignition properties result from this.
  • Another option is the pilot burner 13, 20 to be arranged symmetrically between the main burners 28 and to choose the same sense of rotation of the flow for all burners.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP98810775A 1998-08-12 1998-08-12 Ensemble de brûleur avec un brûleur principal et un brûleur pilote et brûleur pilote pour cet ensemble Withdrawn EP0979972A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98810775A EP0979972A1 (fr) 1998-08-12 1998-08-12 Ensemble de brûleur avec un brûleur principal et un brûleur pilote et brûleur pilote pour cet ensemble

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98810775A EP0979972A1 (fr) 1998-08-12 1998-08-12 Ensemble de brûleur avec un brûleur principal et un brûleur pilote et brûleur pilote pour cet ensemble

Publications (1)

Publication Number Publication Date
EP0979972A1 true EP0979972A1 (fr) 2000-02-16

Family

ID=8236246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810775A Withdrawn EP0979972A1 (fr) 1998-08-12 1998-08-12 Ensemble de brûleur avec un brûleur principal et un brûleur pilote et brûleur pilote pour cet ensemble

Country Status (1)

Country Link
EP (1) EP0979972A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11378277B2 (en) 2018-04-06 2022-07-05 General Electric Company Gas turbine engine and combustor having air inlets and pilot burner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1816948A1 (de) * 1968-12-24 1970-06-25 Vaillant Joh Kg Bunsenbrenner
JPH0252911A (ja) * 1988-08-18 1990-02-22 Toho Gas Co Ltd 高負荷バーナ
EP0397046A2 (fr) * 1989-05-11 1990-11-14 Mitsubishi Jukogyo Kabushiki Kaisha Brûleur
DE4412315A1 (de) * 1994-04-11 1995-10-12 Abb Management Ag Verfahren und Vorrichtung zum Betreiben der Brennkammer einer Gasturbine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1816948A1 (de) * 1968-12-24 1970-06-25 Vaillant Joh Kg Bunsenbrenner
JPH0252911A (ja) * 1988-08-18 1990-02-22 Toho Gas Co Ltd 高負荷バーナ
EP0397046A2 (fr) * 1989-05-11 1990-11-14 Mitsubishi Jukogyo Kabushiki Kaisha Brûleur
DE4412315A1 (de) * 1994-04-11 1995-10-12 Abb Management Ag Verfahren und Vorrichtung zum Betreiben der Brennkammer einer Gasturbine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 221 (M - 0971) 10 May 1990 (1990-05-10) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11378277B2 (en) 2018-04-06 2022-07-05 General Electric Company Gas turbine engine and combustor having air inlets and pilot burner

Similar Documents

Publication Publication Date Title
DE3217674C2 (de) Brennkammer für eine Gasturbine
DE2845619C2 (de) Brennkammer für ein Gasturbinentriebwerk
DE2143012C3 (de) Brenneranordnung bei einer Gasturbinen-Brennkammer
EP0029619B1 (fr) Chambre de combustion pour turbine à gaz avec éléments de prévaporisation/prémélange
EP0675322B1 (fr) Brûleur à prémélange
DE3029095C2 (de) Doppelbrennstoffinjektor für ein Gasturbinentriebwerk
DE3222347C2 (fr)
DE2825431C2 (de) Vorrichtung zur Zufuhr von Luft und Brennstoff in die Brennkammer eines Gasturbinentriebwerkes
EP0933593B1 (fr) Brûleur à deux combustibles
DE2449084C2 (de) Brennkammer
DE69724502T2 (de) Gasturbinenbrennkammer
EP0833105B1 (fr) Brûleur à prémélange
EP1064498B1 (fr) Bruleur pour une turbine a gas
EP2156095B1 (fr) Stabilisation sans tourbillonner de la flamme d'un brûleur à prémélange
DE19750329A1 (de) Voreinspritzverfahren und Vorrichtung für flüssigen Vorbrennstoff für eine Gasturbinentriebwerks-Dual-Brennstoffeinspritzvorrichtung
DE2345282B2 (de) Verbrennungseinrichtung für Gasturbinentriebwerke
CH698470B1 (de) Sekundär-Brennstoffdüse sowie Brennkammer für einen Gasturbinenmotor.
EP0777081B1 (fr) Brûleur à prémélange
DE2912103C2 (de) Brenner für ein Gasturbinentriebwerk
DE4411623A1 (de) Vormischbrenner
EP0193838A2 (fr) Disposition de brûleur pour installations de combustion, en particulier pour chambres de combustion d'installations de turbines à gaz ainsi que procédé de sa mise en oeuvre
EP0619457A1 (fr) Brûleur à prémélange
DE19750310A1 (de) Dual-Brennstoffeinspritzverfahren und -vorrichtung mit Mehrfach-Luftstrahlsprühvorrichtungen für flüssigen Brennstoff
DE19859210A1 (de) Brennstoff-Luft-Mischanordnung für Verbrennungsvorrichtungen
DE4424599A1 (de) Verfahren und Vorrichtung zum Betreiben eines kombinierten Brenners für flüssige und gasförmige Brennstoffe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20000817

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566