EP2885582B1 - Brûleur - Google Patents

Brûleur Download PDF

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Publication number
EP2885582B1
EP2885582B1 EP13750036.9A EP13750036A EP2885582B1 EP 2885582 B1 EP2885582 B1 EP 2885582B1 EP 13750036 A EP13750036 A EP 13750036A EP 2885582 B1 EP2885582 B1 EP 2885582B1
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EP
European Patent Office
Prior art keywords
air
fuel
burner
base
burner head
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.)
Active
Application number
EP13750036.9A
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German (de)
English (en)
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EP2885582A2 (fr
Inventor
Axel Widenhorn
Roland STOLL
Dominik LEBKÜCHNER
Thilo KISSEL
Thomas Monz
Jan Zanger
Timo Zornek
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.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Duerr Systems AG
Original Assignee
Deutsches Zentrum fuer Luft und Raumfahrt eV
Duerr Systems AG
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Publication of EP2885582A2 publication Critical patent/EP2885582A2/fr
Application granted granted Critical
Publication of EP2885582B1 publication Critical patent/EP2885582B1/fr
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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
    • F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
    • 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
    • F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
    • 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
    • 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
    • F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
    • F23R3/54—Reverse-flow combustion chambers
    • 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
    • F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
    • F23R2900/03282—High speed injection of air and/or fuel inducing internal recirculation

Definitions

  • the invention relates to a burner for generating hot gas with a connectable to a turbine flame tube, which is arranged in a surrounding the flame tube air guide device in which a flow path for air is formed, and with a fixed to a base burner head, which is suitable for supplying air mixed fuel into the fire tube has a plurality of communicating with the flow path for air in the air guide device nozzle channels into which a base fixed to the fuel nozzle projects, wherein the fuel nozzles are connected for supplying fuel to a formed in the base Brennstoffplenum with a fuel supply line can be connected.
  • the invention also relates to a method for producing hot gas.
  • the EP 2 213 944 A1 discloses a burner which is particularly suitable for the operation of micro gas turbines.
  • Burners for use in micro gas turbines have a burner head that typically includes 4 to 20 nozzle channels with fuel nozzles disposed therein that are fixed to a burner flange base. In a rearward, away from the burner head portion, the fuel nozzles pass through holes in the burner flange base.
  • the fuel nozzles have connection means for tubular or tubular fuel lines, which are usually connected to an arranged outside the burner fuel distributor ring. To ensure that leaks do not occur in such burners, careful sealing of the fuel nozzles to the burner flange base is required. This has a high production and assembly costs result.
  • a burner with a nozzle which serves for supplying fuel into a first combustion chamber.
  • a fuel-air mixture is directed into the first combustion chamber.
  • the air is supplied by swirl nozzles.
  • the invention is based on the idea that a burner in which the fuel nozzles do not penetrate the base but are connected to an annular channel formed in the base can have a comparatively simple, less expensive construction.
  • the burner can then be constructed with a reduced number of sealing surfaces and seals, which allows reducing manufacturing costs.
  • To supply the burner with fuel no complex distribution system is necessary, with which the fuel is distributed to different fuel nozzles.
  • Compared to conventional burners can be so on one Can be dispensed with variety of hose and pipe connections, which cause a high assembly cost and pose not only safety but also environmental problems.
  • the fuel plenum may, in particular, be a ring channel formed in the base and received in the base.
  • the fuel plenum is designed as a circular groove covered by a cover member on one side of the base.
  • the side of the base on which the annular groove is formed may be facing or facing away from the combustion chamber.
  • One idea of the invention is, in particular, to fix the fuel nozzles in the burner on a holding device covering the annular channel. With the holding device these fuel nozzles are preferably welded or screwed.
  • An inexpensive manufacture of the fuel nozzles is made possible by being made of a preferably temperature-resistant, provided with a core hole rod material.
  • the burner head has a burner head body with a plurality of nozzle channels communicating with the air guide device and surrounds a pilot combustion chamber which is open to the flame tube and communicates with the air guide device.
  • the air flow path is here routed, if possible at least in sections, for cooling the burner head body means by flowing air along the burner head to a burner head outer surface.
  • the pilot combustion chamber can then be supplied with fuel via a pilot fuel nozzle assigned to the pilot combustion chamber. By supplying fuel through the pilot fuel nozzle, it is possible to ignite the burner with an igniter.
  • the flame formed in the pilot combustion chamber also serves to stabilize combustion in the burner.
  • by adjusting the flame formed in the pilot combustion chamber it is possible to control the burner while also stabilizing the flame of the burner.
  • the pilot combustion chamber is preferably formed in an insert fixed to the base, which has a pilot combustion chamber wall protruding into the burner head.
  • the pilot combustion chamber wall can be cooled with air which flows through at least one flow channel which communicates with the air guidance device and is formed between the insert and the burner head.
  • the burner head body can also have a wall delimiting the pilot combustion chamber with a wall surface acting as a combustion chamber wall surface.
  • the burner head body is here cooled with air, which flows along the flow paths for air at the burner head outer surface of the burner head body and then passes through the nozzle channels into the combustion chamber.
  • the combustion chamber wall surface for the pilot combustion chamber is covered with a thermal protective layer.
  • the air guide means preferably comprises an air guide tube held on the base in a resilient bearing which can be moved for balancing thermal expansions relative to the base. This makes it possible to keep the thermal stresses in the burner low.
  • the resilient bearing may comprise a spring received on the base, which supports a spring leg fixed to the air guide tube. It is advantageous if the air duct tube can be displaced on the strut in a base facing portion in a cup-shaped over the air duct tube and thereby preferably rotationally symmetrical baffle that deflects the air introduced through the air guide tube into the nozzle channels to in this way the To supply the burner with optimized air flow.
  • a thermal insulation layer is provided between the cup-shaped guide plate and the base. The invention also extends to a method for producing hot gas according to claim 14.
  • the air supplied into the combustion chamber and the fuel supplied into the combustion chamber are preferably fed into the combustion chamber without twisting as a technically premixed air-fuel mixture.
  • the Indian Fig. 1 shown burner 10 is designed for generating hot gas.
  • the burner 10 has a flame tube 12, which is held in an air guide device 14 and surrounds a combustion chamber 15.
  • the air guiding device 14 of the burner 10 is fixed to a base 34 designed as a burner flange.
  • the burner 10 includes a burner head 16.
  • the burner head 16 is designed as a hollow cylinder having an axis 19 and a plurality of formed in the cylinder wall, azimuthally offset from each other arranged nozzle channels 20 with a through hole parallel to the axis 19. Each of these nozzle channels 20 opens into the combustion chamber 15.
  • a fuel nozzle 17 protrudes into the nozzle channels 20.
  • the flame tube 12 engages over the burner head 16 and lies with its inner side against a portion acting as a guide section for the flame tube 12 on the outside of the burner head 16.
  • the flame tube 12 is linearly movably guided on the burner head 16 in the direction of the axis 19 to allow for the compensation of the thermal expansion of the flame tube 12 in the operation of the burner 10.
  • the air flow paths 21 for air through which the air can be flowed through the nozzle channels 20 in the burner head 16 from the air guide device 14 into the combustion chamber 15.
  • the air supplied from behind via the air guiding device 14 flows around the fuel nozzle 17 and surrounds the gaseous or even liquid fuel injected coaxially with the fuel nozzle 17 into the nozzle channels.
  • the air flow paths 21 are guided along the burner head outer surface of the burner head body 18 to thereby cool the burner head 16 with air flowing along the flow paths 21 when the burner 10 is operated.
  • the air-fuel mixture is vorallischt technically twist-free.
  • the air-fuel mixture then flows out of the nozzle channels 20 with a high pulse into the combustion chamber 15.
  • the entering into the combustion chamber 15 air-fuel jet drives there a pronounced inner recirculation zone. This ensures in the combustion chamber 15 for an effective mixture of recirculated exhaust gas and fresh gas.
  • such an admixture of the exhaust gas slows down the chemical reaction rates. Consequently, the chemical reactions are then distributed over a larger volume.
  • the chemical-kinetically controlled volumetric combustion therefore exhibits a nearly homogeneous temperature field near the adiabatic temperature of the global equivalence ratio. Due to the associated avoidance of temperature peaks can therefore be achieved with the burner 10 very low NOx emissions.
  • the burner 10 has a pilot combustion chamber 22 arranged opposite the combustion chamber 15.
  • the pilot combustion chamber 22 is formed in an insert 24.
  • the insert has a pilot chamber wall 25 which acts as a combustion chamber wall and which extends into the cavity of the burner head body 18 of the burner head 16 with a wall surface bounding the pilot combustion chamber 22.
  • the burner 10 contains a pilot fuel nozzle 30 arranged coaxially with the burner head 16, through which fuel can be applied to the pilot combustion chamber 22, which is burned there with air which flows through flow channels 32 communicating with the air guiding device 14.
  • the pilot fuel nozzle 30 need not necessarily be coaxially disposed with the burner head 16, but may also be positioned so that the fuel flows into the pilot combustion chamber 22 obliquely with respect to the axis 19. To that supplied through the pilot fuel nozzle 30 To ignite fuel, there is an electric ignition device 31 in the burner 10.
  • the air guide device 14 includes an air guide tube 27 and comprises a cup-shaped guide plate 36 which has a bottom wall 38 facing the base 34, which bears against an insulation shield 40. To improve the fluid mechanics here, it is advantageous if in this area, if necessary, further baffles are arranged.
  • the insulation shield 40 is located between the base 34 and the bottom wall 38 and serves for thermal decoupling of the base 34 from the air guide device 14, the flame tube 12, the burner head 16 and the insert 24 with the pilot combustion chamber 22nd
  • the base 34 is designed to secure the burner 10 to the pressure housing of a micro gas turbine (not shown).
  • the air guide device 14 is held in a spring-elastic bearing with a plurality of insulation shield 40 by cross-struts 42, which are each supported against a recess 46 received in the base 34 spring 46.
  • the air guide tube 27 can be displaced relative to the base 34 according to the double arrow 50 in the direction of the axis 19 of the burner head 16 for the compensation of the thermal expansions caused by heating.
  • the burner head 16 and the insert 24 are secured to the base 34 by a plurality of retaining bolts 48 extending through the insulation shield 40.
  • the Fig. 2 shows a portion of the burner with the fuel nozzles 17 and the base 34.
  • the fuel nozzles 17 have a core bore designed as a nozzle bore 29, which acts as a fuel nozzle channel for supplying fuel into the combustion chamber 15.
  • the fuel nozzles 17 are held on the base 34. They pass through the insulation shield 40 and the bottom wall 38 of the baffle 36.
  • This Brennstoffplenum is presently designed as a communicating with the fuel nozzles 17 annular channel 52.
  • the annular channel 52 is closed.
  • the combustion chamber side arranged annular groove which is covered with a fixed in the body 53 of the base 34 by means of screwing or welding annular cover member 54.
  • the annular cover member 54 holds the fuel nozzles 17 in a nozzle seat 33 which projects into a through hole 55 in the cover member 54.
  • the fuel nozzles 17 are fixed by screwing.
  • the nozzle bore 29 of the fuel nozzles 17 communicates with the annular channel 52.
  • the Fig. 3 shows the fuel nozzles 17 with the annular cover member 54.
  • the Fig. 4 is a partial view of the base 34 with a plurality of fuel nozzles 17.
  • the fuel nozzles 17 are made of a provided with the core bore preferably temperature-resistant bar material. This measure makes it possible to produce the fuel nozzles 17 with a low production cost.
  • the fuel nozzles 17 have, in a section facing the cover element 54, an external thread 23 which is screwed into the nozzle seat 33 fixed to the cover element 54 by means of welding. This measure allows a simple and quick replacement of fuel nozzles 17 in the burner 10th
  • the fuel nozzles 17 in a modified embodiment of the burner 10 can also be connected to the annular cover element 54 by means of welding.
  • the annular channel 52 in the base 34 of the burner 10 is acted upon by a supply channel 56 with fuel.
  • the supply passage 56 may be connected to a fuel line (not shown) by a coupling member 58.
  • the annular channel 52 is a distribution ring for fuel.
  • the annular channel can also as a covered by a cover member circular groove on the side of the base 34 may be designed, which faces away from the combustion chamber 15. In this case, it is z. B. is not necessary to weld the cover element to the base, as during operation of the burner always moderate temperatures occur in which a use of conventional seals is easily possible.
  • the fuel distributed in the annular channel 52 to the nozzles 17 of the burner 10 may be liquid or gaseous.
  • the annular channel 52 is thus a fuel plenum integrated in the base 34 designed as a burner flange, ie the annular channel acts as a fuel distributor received in the body 53 of the base 34.
  • the Fig. 5 shows a portion of another burner 100 for generating hot gas with a connectable to a turbine flame tube 112, the one with reference to the above Fig. 1 to Fig. 4 described burner 10 has appropriate structure.
  • the assemblies of the burner 100 which are equal to assemblies of the burner 10, with respect to the Fig. 1 to Fig. 4 indicated by the number 100 increased reference numerals.
  • the body 118 of the burner head 116 in the burner 100 is here pot-shaped or funnel-shaped or rotationally symmetrical.
  • the body 118 has a bottom wall 139 having a bottom-side opening 141 for a pilot fuel nozzle 130 which projects into a mixing chamber 143 acting as a premixing passage formed in the body 118.
  • the body 118 of the burner head 116 has a plurality of air ducts 145 disposed in the bottom wall 139 and extending outwardly from the mixing chamber 143 acting as a premixing path. These air guide channels 145 are connected to the air flow path 121 in the air guide 114.
  • the air ducts 145 open into the mixing chamber 143 acting as premixing path.
  • the body 118 of the burner head 116 has a portion with a preferably rotationally symmetrical pilot combustion chamber wall 147 which surrounds the pilot combustion chamber 122 and which has a wall surface 151 delimiting the pilot combustion chamber 122.
  • the wall surface 151 is a combustion chamber wall surface for the pilot combustion chamber 122.
  • a plurality of nozzle channels 120 are formed, each receiving air from the air guide 114.
  • a fuel nozzle 117 is arranged.
  • the wall surface 151 of the burner head body 118 facing the pilot combustion chamber 122 is coated with a thermal protection layer 149.
  • the burner head body 118 By flowing with the flow path 121 between the flame tube 112 and the air guide tube 127 air that passes through the air ducts 145 in the mixing chamber acting as premixing 143 and through the nozzle channels 120 into the combustion chamber, the burner head body 118 is cooled in an operation of the burner 100 , The fuel emerging from the fuel nozzles 117, which flows through the fuel nozzles, also contributes to the cooling of the burner head body 118. Since the cooling effect for the burner head body 118 improves with decreasing wall thickness, it is advantageous if the wall thickness of the pilot combustion chamber wall 147 of the burner head body 118 is as thin as possible.
  • a burner 10 for generating hot gas has a flame tube 12 which can be connected to a turbine.
  • the burner contains an air guiding device 14 which surrounds the flame tube 12 and has a flow path 21 for air.
  • the burner has a burner head 16 fixed to a base 34.
  • the burner head 16 has a plurality of nozzle channels 20 communicating with the air flow path 21 in the air guide device 14.
  • the nozzle channels 20 projects respectively a fuel nozzle 17 fixed to the base 34.
  • the fuel nozzles 17 are connected to an annular channel 52 formed in the base 34 for supply with fuel, which can be connected to a fuel supply line.

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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)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Claims (16)

  1. Brûleur (10, 134) servant à produire un gaz chaud à l'aide d'un tube à flammes (12, 112) pouvant être raccordé à une turbine et d'un dispositif de guidage d'air (14), le tube à flammes (12, 112) étant disposé dans le dispositif de guidage d'air (14) l'entourant dans lequel une voie d'écoulement (21, 121) est réalisée pour l'air et avec une tête de brûleur (16) fixée au niveau d'une base (34, 134) comportant, pour l'amenée de combustible mélangé à de l'air dans le tube à flammes (12, 112), plusieurs canaux de buse (20, 120) communiquant avec la voie d'écoulement (21) prévue pour l'air dans le dispositif de guidage d'air (14), ces canaux ayant respectivement une ouverture d'entrée de canal de buse pour l'amenée d'air et rentrant respectivement dans une buse de combustible (17, 117) fixée à une base (34, 134) ;
    les buses de combustible (17, 117) prévues pour l'alimentation en combustible étant raccordées à une chambre de combustible réalisée dans la base (34, 134), cette chambre pouvant être reliée à une conduite d'alimentation en combustible ; et
    la tête de brûleur (16) ayant un corps de tête de brûleur (18, 118) dans lequel sont réalisés les canaux de buse (20, 120) communiquant avec la voie d'écoulement (21, 121) prévue pour l'air (14) dans le dispositif de guidage d'air, ladite tête entourant une chambre de combustion pilote (22, 122) ouverte en direction du tube à flammes (12, 112) et communiquant avec le dispositif de guidage d'air (14) ;
    caractérisé en ce que :
    les canaux de buse (20, 120) s'étendent dans le corps de tête de brûleur (18, 118) dans des alésages traversants perpendiculaires à la base (34, 134), ces canaux étant disposés de façon décalée les uns par rapport aux autres dans le plan azimutal, l'ouverture d'entrée de canal de buse, servant à l'amenée d'air guidé dans le dispositif de guidage d'air (14), de chaque canal de buse (20, 120) étant traversée par la buse de combustible (17, 117) saillant dans le canal de buse (20, 120) et le corps de tête de brûleur (18, 118) comportant une paroi de fond (139) avec une ouverture de côté de fond pour une buse de combustible pilote (130) saillant dans une chambre de mélange (143) réalisée dans le corps de tête de brûleur (18, 118) et servant de tronçon de prémélange, le corps de tête de brûleur (18, 118) comportant plusieurs canaux de guidage d'air disposés dans la paroi de fond (139) et s'étendant vers l'extérieur en partant de la chambre de mélange (143), ces canaux de guidage d'air (145) étant raccordés à la voie d'écoulement (121) prévue pour l'air dans le dispositif de guidage d'air (114) et ces canaux de guidage d'air (145) débouchant dans la chambre de mélange (143).
  2. Brûleur selon la revendication 1, caractérisé en ce que la chambre de combustion pilote (22) est réalisée dans un insert (24) fixé à la base (34) ayant une paroi de chambre de combustion pilote (25) pouvant être refroidie avec de l'air s'écoulant à travers au moins un canal fluidique (26) communiquant avec la voie d'écoulement (21) prévue pour l'air dans le dispositif de guidage d'air (14).
  3. Brûleur selon la revendication 1, caractérisé en ce que le corps de tête de brûleur (118) est agencé en forme de pot et comporte une section avec une paroi de chambre de combustion pilote (147) entourant la chambre de combustion pilote (122) ayant une surface de paroi (151) délimitant la chambre de combustion pilote (122).
  4. Brûleur selon la revendication 3, caractérisé en ce que les canaux de buse (120) communiquant avec la voie d'écoulement (121) prévue pour l'air dans le dispositif de guidage d'air (114) sont réalisés dans la paroi de chambre de combustion pilote (147).
  5. Brûleur selon la revendication 3 ou 4, caractérisé en ce que la surface de paroi de chambre de combustion (151) prévue pour la chambre de combustion pilote (122) est recouverte d'une couche de protection thermique.
  6. Brûleur selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la chambre de combustible est réalisée sous la forme d'un canal annulaire (52) disposé dans la base (34), les buses de combustible (17) étant fixées à un dispositif de maintien (54) recouvrant la chambre de combustible et étant reliées au dispositif de maintien (54), notamment soudées ou vissées et de préférence fabriquées à partir de barres résistantes à la température et pourvues d'un alésage en leur coeur.
  7. Brûleur selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la base (34) est réalisée sous la forme d'une partie de flasque servant pour la fixation du brûleur (10) dans un carter de pression.
  8. Brûleur selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la voie d'écoulement (21) prévue pour l'air est guidée au moins par parties le long de la tête de brûleur (16) au niveau d'une surface extérieure de tête de brûleur, pour le refroidissement par écoulement d'air du corps de tête de brûleur (18).
  9. Brûleur selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la chambre de combustion pilote (22) peut être alimentée en combustible via une buse de combustible pilote (30).
  10. Brûleur selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le dispositif de guidage d'air (14) comprend un tube de guidage d'air (27) maintenu au niveau de la base (34) dans un palier à élasticité ressort pouvant être déplacé par rapport à la base (34) pour compenser les dilatations thermiques.
  11. Brûleur selon la revendication 10, caractérisé en ce que le palier à élasticité ressort comprend un ressort (46) logé au niveau de la base (34) soutenant une jambe de ressort (42) fixée au tube de guidage d'air (27), le tube de guidage d'air (27) étant disposé, au niveau de la jambe de ressort (42) avec une section orientée vers la base (34), dans une tôle conductrice (36) agrippant le tube de guidage d'air (27), fixée à la base (34), de préférence réalisée en forme de pot, ladite tôle déviant l'air amené par le tube de guidage d'air (27) dans les canaux de buse (20) .
  12. Brûleur selon la revendication 11, caractérisé en ce qu'un panneau isolant (40) découplant thermiquement la tôle conductrice (36) avec le dispositif de guidage d'air (14) et le tube à flammes (12) de la base (34) est prévu entre la tôle conductrice (36) et la base (34) .
  13. Installation de turbine à gaz comprenant une turbine à gaz dotée d'un brûleur selon l'une quelconque des revendications précédentes et d'un dispositif de guidage d'air dans lequel est disposé un tube à flammes (12, 112) d'un brûleur selon l'une quelconque des revendications précédentes.
  14. Procédé servant à produire un gaz chaud, caractérisé par les étapes suivantes :
    mise à disposition d'un brûleur (10, 100) doté d'un tube à flammes (12, 112) entourant une chambre de combustion (15) et d'un corps de tête de brûleur (18, 118) entourant une chambre de combustion pilote (22, 122) ouverte en direction de la chambre de combustion (15) ;
    alimentation en air et injection de combustible dans la chambre de combustion pilote (22, 122) ;
    inflammation du combustible amené dans la chambre de combustion pilote (22, 122) ;
    réalisation d'un mélange air-combustible amené dans la chambre de combustion (15) ; et
    combustion du mélange air-combustible dans la chambre de combustion (15) ;
    caractérisé en ce que :
    le corps de tête de brûleur (18, 118) comporte une paroi de fond (139) avec une ouverture de côté de fond (141), le corps de tête de brûleur (18, 118) contenant plusieurs canaux de guidage d'air communiquant avec un dispositif de guidage d'air (114), ces canaux débouchant dans l'ouverture de côté de fond de la paroi de fond (139) du corps de tête de brûleur (18, 118) ; et
    l'air amené dans la chambre de combustion pilote (22, 122) est amené à travers les canaux de guidage d'air dans la paroi de fond (139) dans la chambre de combustion pilote (22, 122) à l'aide d'un courant tourbillonné ;
    le mélange air-combustible amené à la chambre de combustion (15) étant prémélangé techniquement sans remous en injectant dans le plan coaxial le combustible dans les canaux de buse (20) traversant une section du corps de tête de brûleur (18, 118), les buses de combustible (17) rentrant dans les canaux de buse (20) et étant entourées par derrière avec ledit air formant avec le combustible le mélange air-combustible amené dans la chambre de combustion (15), l'air entourant le combustible injecté dans les canaux de buse (20) et refroidissant en l'occurrence le corps de tête de brûleur (18, 118).
  15. Procédé selon la revendication 14, caractérisé en ce que le corps de tête de brûleur (18, 118) est refroidi à l'aide de l'air s'écoulant tout du long via les voies d'écoulement au niveau de la surface extérieure de tête de brûleur du corps de tête de brûleur (18, 118) et arrivant ensuite, à travers les canaux de buse (20, 120), dans la chambre de combustion (15, 115).
  16. Procédé selon l'une quelconque des revendications 14 ou 15, caractérisé en ce que l'air entre une paroi de dôme pilote (25) servant de paroi de chambre de combustion et la section du corps de tête de brûleur (18) traversée par les canaux de buse (20) est traversé par les canaux d'écoulement d'air (26).
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WO2014027005A2 (fr) 2014-02-20
EP2885582A2 (fr) 2015-06-24
US20180238549A1 (en) 2018-08-23
US20150089954A1 (en) 2015-04-02
DE102012216080A1 (de) 2014-02-20
US9982891B2 (en) 2018-05-29
WO2014027005A3 (fr) 2014-06-12

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