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EP3133342A1 - Vorgemischter dualer brennstoffbrenner mit sich verschmälernder einspritzkomponente für den hauptflüssigbrennstoff - Google Patents

Vorgemischter dualer brennstoffbrenner mit sich verschmälernder einspritzkomponente für den hauptflüssigbrennstoff Download PDF

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Publication number
EP3133342A1
EP3133342A1 EP15181707.9A EP15181707A EP3133342A1 EP 3133342 A1 EP3133342 A1 EP 3133342A1 EP 15181707 A EP15181707 A EP 15181707A EP 3133342 A1 EP3133342 A1 EP 3133342A1
Authority
EP
European Patent Office
Prior art keywords
burner
injection
injection component
liquid fuel
fuel
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Withdrawn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
EP15181707.9A
Other languages
English (en)
French (fr)
Inventor
Nicklas Johansson
Thomas Lindgren
Magnus Persson
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP15181707.9A priority Critical patent/EP3133342A1/de
Priority to PCT/EP2016/068139 priority patent/WO2017029101A1/en
Priority to CN201680046564.6A priority patent/CN107923612B/zh
Priority to EP16745457.8A priority patent/EP3314165B1/de
Priority to US15/747,502 priority patent/US20180216828A1/en
Publication of EP3133342A1 publication Critical patent/EP3133342A1/de
Withdrawn legal-status Critical Current

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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
    • F23R3/286—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
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
    • F23C1/08—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air liquid and gaseous fuel
    • 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
    • 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
    • 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
    • F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
    • F23R3/04—Air inlet arrangements
    • F23R3/10—Air inlet arrangements for primary air
    • F23R3/12—Air inlet arrangements for primary air inducing a vortex
    • F23R3/14—Air inlet arrangements for primary air inducing a vortex by using swirl vanes
    • 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
    • F23R3/36—Supply of different fuels
    • 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
    • F23C2900/07001—Air swirling vanes incorporating fuel injectors
    • 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
    • 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
    • F23C2900/07021—Details of lances

Definitions

  • the present invention relates to turbomachine components and more particularly to a burner for a dual fuel based combustion chamber for a turbomachine.
  • a burner assembly in a combustion section includes a burner head connected to a swirl generator or swirler that in turn is connected to a mixer or premixing pathway or section.
  • the burner assembly is connected to or assembled with a combustion chamber.
  • the main fuels, distinct from pilot fuel supplies are mostly both gaseous and liquid.
  • the basic technique in such dual fuel combustions is to premix the main fuel with air from a compressor of the turbomachine before igniting the combustion mixture, i.e. mixture of the air from the compressor and the main fuel, in the combustion chamber.
  • the air from the compressor is mixed with the main gaseous fuel, either inside the swirler or just before introduction into the swirler, and then swirled by the swirler to create a swirling flow of the air and the main gaseous fuel.
  • This swirling flow of the pressurized air from the compressor and the main gaseous fuel then enters from the swirler into the premixing section.
  • the premixing section the pressurized air from the compressor and the main gaseous fuel are allowed to mix well before exiting into the combustion chamber or the combustion space where the combustion mixture undergoes combustion.
  • the main liquid fuel is discharged by a nozzle positioned at the burner head.
  • the main liquid fuel after exiting the nozzle, preferably in atomized form, enters the swirler and then continues into the premixing section and finally into the combustion chamber where the main liquid fuel participates in the combustion reaction.
  • a flow of combustion mixture and/or components of the combustion mixture is jeopardized which leads into increased possibility of formation of recirculation zones within burner interiors such as the premixing section.
  • the formation of the recirculation zones within the burner interiors is undesirable, as it may result into overheating of the burner components for example the premixing section and/or the swirler.
  • a continued problem of overheating over an extended period of time may result into damaging of the parts of the burner components i.e. the premixing section, the swirler, etc.
  • efficiency of the turbomachines in operation is reduced.
  • An object of the present technique is to obviate the above mentioned disadvantages and to ensure that recirculation zones for the combustion are formed at a desired spatial position in the combustion chamber or the combustion space. It is undesirable to allow formation of the recirculation zone within the premixing section of the burner. Achieving this object increases the combustion efficiency and thus the efficiency of the overall turbomachine, elongates operational life of the components of the burner and associated structures that may otherwise get over heated due to formation or extension of recirculation zones at undesirable spatial positions within the burner interiors, and stabilizes the combustion reaction due to control on the recirculation zone formation and its spatial position in the combustion chamber.
  • the premixed dual fuel burner for a combustion chamber of a turbomachine.
  • the premixed dual fuel burner hereinafter referred to as the burner, includes a burner head, a burner interior, a swirler, a premixing section and an injection component.
  • the swirler is arranged in series between the burner head and the premixing section.
  • the burner head includes a burner head end.
  • the burner interior is elongated along a main axis of the burner and is formed of an upstream side and a downstream side.
  • the upstream side is disposed between the burner head and the downstream side.
  • the upstream side is fluidly connected to the downstream side, i.e. the upstream side and the downstream side are continuous and together form the burner interior.
  • a part of the burner interior enclosed by the swirler is the upstream side of the burner interior and the other part of the burner interior enclosed by the premixing section is the downstream side of the burner interior.
  • the swirler includes an inlet section.
  • the inlet section is configured to introduce air and a main gas fuel into the burner interior.
  • the premixing section has a burner outlet through which the premixing side is configured to be arranged or fixed or assembled with the combustion chamber such that the downstream side is fluidly connected to the combustion chamber.
  • the injection component has a tapering structure positioned along the main axis.
  • the tapering structure of the injection component extends from the burner head into the burner interior.
  • the injection component has a burner head side and an injection side.
  • the injection component tapers from the burner head side to the injection side along the main axis.
  • the injection component includes at least one liquid fuel outlet at the injection side.
  • the injection component is configured to introduce a main liquid fuel into the burner interior through the at least one liquid fuel outlet.
  • the main liquid fuel introduced in the burner interior by the injection component via the liquid fuel outlet is directed towards the combustion chamber.
  • the injection side of the injection component is disposed in the burner interior.
  • the tapering structure of the injection component minimizes aerodynamic disturbances in the burner interior, and thus ensuring efficient functioning of the swirler in generating swirl which in turn aids in achieving a desired spatial position of a central recirculation zone, preferably the central recirculation zone or the main recirculation zone is formed and limited completely within the combustion chamber, and thus minimizing possibilities of a flashback into the burner interior.
  • the tapering structure of the injection component facilitates an axial velocity, i.e. along the main axis, of the combustion mixture i.e. the main fuel gas and the air mixture exiting from the swirler into the premixing section and continuing further into the combustion chamber. The facilitation of the axial velocity results from directed flow of the combustion mixture and/or its constituents along the tapering structure.
  • the tapering form of the injection component acts as a guide to the flow of main gas fuel and air facilitating the axial flow direction. This also helps in achieving the desired spatial position of the recirculation zone, which is preferably positioned in the combustion chamber and outside the premixing section. The positioning of the recirculation zone outside the premixing zone and within the combustion chamber minimizes possibilities of a flashback into the burner interior for example into the premixing section interior.
  • the tapering structure of the injection component is a conical structure.
  • the conical structure has preferably a regular geometrical shape i.e. the conical structure is symmetrical about a longitudinal axis of the conical structure.
  • the tapering of the structure is smooth and gradual.
  • the regular conical structure helps in further reduction of the aerodynamic disturbances in the burner interior.
  • the conical shape being a regular shape is easy to manufacture and assemble.
  • the tapering structure of the injection component is arranged coaxially to the main axis.
  • the longitudinal axis of the conical structure overlaps with the main axis. This adds symmetry to the burner interior and this facilitates the further reduction of the aerodynamic disturbances in the burner interior.
  • a first distance is between 20% and 80% of a second distance.
  • the first distance is a distance measured along the main axis between the at least one liquid fuel outlet and the burner head end.
  • the second distance is a distance measured along the main axis between the burner outlet of the premixing section and the burner head end, in other words a length of the burner interior along the main axis.
  • the main liquid fuel is ejected or injected out into the burner interior at a desirable position in the burner interior thus at least partially decreasing the risk of spraying the liquid fuel on surfaces of the inner walls of the swirler and/or the premixing section.
  • the injection component is configured to be longitudinally adjustable along the main axis such that a position of the at least one liquid fuel outlet of the injection component is changeable from a first location along the main axis to a second location along the main axis.
  • a desirable position in the burner interior to eject or inject out the main liquid fuel can be adjusted during an operation of the turbomachine and/or may be set as desired between two operations of the turbomachine.
  • the at least one liquid fuel outlet is positioned in the upstream side of the burner interior. This provides an embodiment in which, if so desired for a particular mode of operation of the turbomachine, the main liquid fuel can be injected out of the liquid fuel outlet before the premixing section.
  • the at least one liquid fuel outlet is positioned in the downstream side of the burner interior.
  • the main liquid fuel can be injected out of the liquid fuel outlet into the burner interior enclosed by the premixing section. Furthermore, this embodiment ensures that spraying of the liquid fuel on surfaces of the inner wall of the swirler and at least a part of the surfaces of the inner wall of the premixing section are minimized.
  • the at least one liquid fuel outlet is at an end of the injection side of the injection component. This ensures that a spray or a fluid stream of the main liquid fuel is directed along the main axis towards the combustion chamber.
  • the injection component includes a first additional outlet configured to introduce the main liquid fuel into the burner interior. The first additional outlet is at a side of the injection side of the injection component. This provides an additional direction in which an additional spray or an additional fluid stream of the main liquid fuel is directed towards the combustion chamber. This additional direction is at an acute angle to the main axis and is directed towards the combustion chamber.
  • the at least one liquid fuel outlet is at a side of the injection side of the injection component. This ensures that a spray or a fluid stream of the main liquid fuel is directed towards the combustion chamber along an angle to the main axis. This direction is at an acute angle to the main axis and is directed towards the combustion chamber.
  • the injection component includes a second additional outlet configured to introduce the main liquid fuel into the burner interior. The second additional outlet is at an end of the injection side of the injection component. This provides an additional direction, i.e. along the main axis, in which an additional spray or an additional fluid stream of the main liquid fuel is directed towards the combustion chamber.
  • the inlet section of the swirler includes at least one air inlet and at least one main fuel gas inlet.
  • the main gas fuel and the air from a compressor of the turbomachine may be introduced into the burner interior separately at the swirler.
  • the main gas fuel and the air from the compressor may be introduced via a common inlet.
  • the at least one air inlet and/or the at least one main fuel gas inlet is arranged tangentially along the swirler with respect to the main axis. This provides a commonly used embodiment of the swirler and thus the burner of the present technique may be realized, operated and manufactured with ease.
  • the swirler has a conical frustum shape having a top side and a bottom side. A cross-section of the conical frustum increases from the top side towards the bottom side. The top side is connected to the burner head and the bottom side is connected to the pre-mixing section.
  • the premixing section has a part of the premixing section which surrounds the burner outlet of the premixing section.
  • the part of the premixing section includes an external pilot.
  • the external pilot is configured to introduce a pilot fuel into the combustion chamber. This aids in formation an external recirculation zone in the combustion chamber and thus aiding in lean combustion.
  • the present technique may be implemented in turbomachines that use Dry Low NO x combustions.
  • FIG 1 a cross-sectional view of an exemplary embodiment of a premixed dual fuel burner 1, hereinafter referred to as the burner 1 has been schematically represented.
  • the burner 1 essentially uses at least two main fuels - a main gas fuel and a main liquid fuel - in addition to and besides a pilot fuel and associated pilot fuel supply lines and techniques.
  • the burner 1 includes a burner head 10, a burner interior 20, a swirler 30, a premixing section 40 and an injection component 50.
  • the burner 1 is assembled in association with a combustion chamber 99 in a turbomachine (not shown) which work with dual fuel combustion reaction.
  • the main fuel is combusted in the combustion chamber 99 in form of a combustion mixture after being mixed with an air from a compressor section (now shown) of the turbomachine.
  • the main gas fuel mixed with air and the main liquid fuel may be combusted in the combustion chamber 99 separately or simultaneously.
  • the burner head 10 includes a burner head end 12.
  • the swirler 30 is arranged in series between the burner head 10 and the premixing section 40.
  • the burner 1 has a main axis 9.
  • the burner head 10, the swirler 30 and the premixing section 40 are arranged along the main axis 9.
  • the swirler 30 is an elongated 3-dimensional body. When visualized as not integrated as a part of the burner 1, the swirler 30 is open at both ends and has a side wall enclosing a volume or limiting a volume within the side wall and the open ends.
  • the premixing section 40 is an elongated 3-dimensional body. When visualized as not integrated as a part of the burner 1, the premixing section 40 is open at both ends and has a side wall enclosing a volume or limiting a volume within the side wall and the open ends.
  • the volume enclosed by swirler 30 and the volume enclosed by the premixing section 40 together form a volume referred to as the burner interior 20.
  • the swirler 30 may be connected to the burner head 10 by direct physical contact, as depicted in FIG 1 , or may be connected to the burner head 10 through an intermediate piece (not shown) or a connecting region (not shown).
  • the swirler 30 may be connected to the premixing section 40 by direct physical contact with the premixing section 40 or may be connected to the premixing section 40 through an intermediate connecting piece (not shown).
  • the burner interior 20 represents a total volume enclosed by the swirler 30 and the premixing section 40 with burner head 10 at one end of the total volume and the combustion chamber 99 at the other end of the total volume, either with or without one or more such intermediate connecting pieces.
  • the burner interior 20 is a volume or a hollow that is elongated along the main axis 9.
  • the burner interior 20 is formed of an upstream side 22 and a downstream side 24.
  • the upstream side 22 is disposed between the burner head 10 and the downstream side 24.
  • the upstream side 22 and the downstream side 24 may be understood as a continuous volume, or in other words, the upstream side 22 is fluidly connected to the downstream side 24, i.e. the upstream side 22 and the downstream side 24 are continuous and together form the burner interior 20 in FIG 1 .
  • a part of the burner interior 20 enclosed by the swirler 30 is the upstream side 22 of the burner interior 20 and the other part of the burner interior 20 enclosed by the premixing section 40 is the downstream side 24 of the burner interior 20.
  • the swirler 30 is directly connected to or affixed to or assembled with the burner head end 12 of the burner head 10, and the swirler 30 is also directly connected to or affixed to or assembled with the premixing section 40.
  • the swirler 30 may be conically designed for example having a conical frustum shape.
  • the conical frustum shape of the swirler 30 has a top side 36 and a bottom side 38.
  • a cross-sectional area of the bottom side 38 is greater than a cross-sectional area of the top side 36, or in other words, a cross-section of the conical frustum increases from the top side 36 towards the bottom side 38 along the main axis 9.
  • the top side 36 is connected to the burner head end 12 of the burner head 10 and the bottom side 38 is connected to the pre-mixing section 40.
  • the swirler 30 includes an inlet section 32.
  • the inlet section 32 is fluidly connected to the compressor (not shown) of the turbomachine (not shown).
  • the inlet section 32 receives compressed air from the compressor and introduces the compressed air into the burner interior 20, more precisely into the upstream side 22 of the burner interior 20.
  • the inlet section 32 is fluidly connected to a fuel supply (not shown) of the turbomachine.
  • the inlet section 32 receives main gas fuel from the fuel supply and introduces the main gas fuel into the burner interior 20, more precisely into the upstream side 22 of the burner interior 20.
  • the inlet section 32 of the swirler 30 includes at least one air inlet 33 and at least one main fuel gas inlet 34.
  • the compressed air is introduced into the burner interior 20 via the air inlet 33 and the main gas fuel is introduced into the burner interior 20 via the main fuel gas inlet 34.
  • the air inlet 33 may be tangentially arranged along the swirler 30 with respect to the main axis 9.
  • the main fuel gas inlet 34 may be tangentially arranged along the swirler 30 with respect to the main axis 9.
  • the air inlet 33 and/or the main fuel gas inlet 34 may be formed as longitudinally extending slots through a body wall (now shown) of the conical frustum.
  • the inlet section 32 includes a plurality of the air inlets 33 and a plurality of the main fuel gas inlets 34 arranged around the swirler 30 in a distributed way such that when the main gas fuel and the compressed air enter the burner interior 20 though the air inlets 33 and the main fuel gas inlets 34, a swirl is generated in the compressed air and the main gas fuel.
  • Principle of swirl generation through longitudinal slots i.e. the air inlets 33 and the main fuel gas inlets 34, on such a conical shaped swirler 30 is known in the art of turbomachines and thus not explained in details herein for sake of brevity.
  • the premixing section 40 is an elongated tubular body.
  • the premixing section 40 has a burner outlet 42 through which the premixing section 40 is arranged or fixed or assembled with the combustion chamber 99.
  • the burner outlet 42 of the premixing section 40 is an opening through which the burner interior 20, more precisely the downstream side 24 of the burner interior 20 fluidly connects to the combustion chamber 99.
  • the burner interior 20 is continuous with the combustion chamber 99 through the burner outlet 42.
  • the combustion mixture and/or its constituents flow from the swirler 30 into the premixing section 40 and then into the combustion chamber 99 though the burner outlet 42.
  • the premixing section 40 also referred to as mixer 40, performs or allows the mixing of the compressed air and the main gas fuel.
  • the injection component 50 has a tapering structure positioned along the main axis 9.
  • the tapering structure of the injection component 50 extends from the burner head 12 into the burner interior 20.
  • the injection component has a burner head side 52 and an injection side 54.
  • the injection component 50 tapers from the burner head side 52 to the injection side 54 along the main axis 9.
  • the tapering means a cross-sectional area perpendicular to the main axis 9 of the injection component 50 decreases when moving from the head side 52 to the injection side 54 along the main axis 9. In one embodiment the decrease in the cross-sectional area is gradual for example when the injection body 50 is designed like in form of a regular conical structure, as also depicted in FIG 2 .
  • the injection component 50 includes at least one liquid fuel outlet 55 at the injection side 54.
  • a main liquid fuel is introduced into the burner interior 20 through the at least one liquid fuel outlet 55.
  • the main liquid fuel may be fed to the liquid fuel outlet 55 via fuel lines (not shown) formed inside the injection body 50.
  • the fuel lines within the injection component 50 may in turn be connected to a liquid fuel supply (now shown) of the turbomachine.
  • the injection side 54 of the injection component 50 is disposed in the burner interior 20 as a free standing manner i.e. without any physical supports at the injection side 54.
  • the injection body 50 in an exemplary embodiment of the burner 1, is coaxially positioned with the main axis 9.
  • the at least one liquid fuel outlet 55 is at a side 58 of the injection side 54 of the injection component 50.
  • there are more than one liquid fuel outlets 55 located on the injection side 54 of the injection component 50 for example FIG 1 shows two liquid fuel outlets 55, from each of the liquid fuel outlets 55 the main liquid fuel is discharged in form of a fluid stream or in atomized form with a direction towards the combustion chamber 99, for example as depicted by arrows 71.
  • the injection component 50 may include a second additional outlet 62 which may have different shape or size as compared to the liquid fuel outlet 55.
  • the second additional outlet 62 is also used to introduce the main liquid fuel into the burner interior 20, albeit the second additional outlet 62 is at a different position on the injection side 54 for example an end 56 of the injection side 54 of the injection component 50.
  • FIGs 3 and 4 schematically illustrate a cross-sectional view of another exemplary embodiment of the burner 1.
  • the at least one liquid fuel outlet 55 is at an end 56 of the injection side 54 of the injection component 50.
  • FIG 3 shows one liquid fuel outlet 55 from which the main liquid fuel is discharged in form of a fluid stream or in atomized form with a direction towards the combustion chamber 99, for example as depicted by arrow 71.
  • the injection component 50 may include a first additional outlet 61 which may have different shape or size as compared to the liquid fuel outlet 55.
  • Fig 4 depicts two such first additional outlets 61.
  • the additional outlet 61 is also used to introduce the main liquid fuel into the burner interior 20, albeit the first additional outlet 61 is at a different position on the injection side 54 for example a side 58 of the injection side 54 of the injection component 50.
  • the premixing section 40 has a part 44 of the premixing section 40 that surrounds the burner outlet 42 of the premixing section 40.
  • the part 44 includes an external pilot 45, as depicted in FIG 1 . From the external pilot 45, a pilot fuel is introduced into the combustion chamber 99.
  • FIGs 1 and 3 show introduction of the pilot fuel through the part 44 into the combustion chamber 99. A direction of injection of the pilot fuel is depicted by arrow 72 in FIGs 1 and 3 .
  • FIG 1 shows just one external pilot 45, it is well within the scope of the present technique that a plurality of the external pilots 45 are present distributed circumferentially around a body (not shown) of the premixing section 40 around the burner outlet 42.
  • the external recirculation zone 5 surrounds the central recirculation zone 4 annularly and helps to further stabilize the central recirculation zone 4.
  • FIGs 5, 6 and 7 different positions of the injection component 50 along the main axis 9 are depicted.
  • the liquid fuel outlet 55 is positioned in the downstream side 24 of the burner interior 20.
  • the liquid fuel outlet 55 is positioned in the downstream side 24 of the burner interior 20 albeit in a different position with respect to the position of the liquid fuel outlet 55 of FIG 5 .
  • the liquid fuel outlet 55 is positioned in the upstream side 22 of the burner interior 20.
  • a first distance 91 is a distance along the main axis 9 between the at least one liquid fuel outlet 55 and the burner head end 12
  • a second distance 92 is a distance along the main axis 9 between the burner outlet 42 of the premixing section 40 and the burner head end 12.
  • the first length 91 is calculated as a mathematical average of all the distances of each individual liquid fuel outlets 55 from the burner head end 12.
  • a ratio of the first distance 91 and the second distance 92 may vary, for example the first distance 91 may be between 20% and 80% of the second distance 92 along the main axis 9.
  • the injection component 50 is longitudinally adjustable or moveable along the central axis 9, such that a position of the at least one liquid fuel outlet 55 of the injection component 50 gets changed from a first location 93, as depicted in FIG 5 along the main axis 9 to a second location 94 along the main axis 9, as depicted in FIG 6 .
  • the injection component 50 is retractable into the burner interior 20 from the combustor chamber outlet 42 towards the burner head 10 and/or is extendable into the burner interior 20 from burner head 10 towards the combustor chamber outlet 42.
  • FIG 7 shows another second location 94 depicted in FIG 7 as compared to the second location 94 of FIG 6 and as compared to the first location 93 of FIG 5 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
EP15181707.9A 2015-08-20 2015-08-20 Vorgemischter dualer brennstoffbrenner mit sich verschmälernder einspritzkomponente für den hauptflüssigbrennstoff Withdrawn EP3133342A1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP15181707.9A EP3133342A1 (de) 2015-08-20 2015-08-20 Vorgemischter dualer brennstoffbrenner mit sich verschmälernder einspritzkomponente für den hauptflüssigbrennstoff
PCT/EP2016/068139 WO2017029101A1 (en) 2015-08-20 2016-07-29 A premixed dual fuel burner with a tapering injection component for main liquid fuel
CN201680046564.6A CN107923612B (zh) 2015-08-20 2016-07-29 具有用于主液体燃料的渐缩喷射部件的预混合双燃料燃烧器
EP16745457.8A EP3314165B1 (de) 2015-08-20 2016-07-29 Vorgemischter dualer brennstoffbrenner mit sich verschmälernder einspritzkomponente für den hauptflüssigbrennstoff
US15/747,502 US20180216828A1 (en) 2015-08-20 2016-07-29 A premixed dual fuel burner with a tapering injection component for main liquid fuel

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EP16745457.8A Active EP3314165B1 (de) 2015-08-20 2016-07-29 Vorgemischter dualer brennstoffbrenner mit sich verschmälernder einspritzkomponente für den hauptflüssigbrennstoff

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US11454396B1 (en) 2021-06-07 2022-09-27 General Electric Company Fuel injector and pre-mixer system for a burner array
EP4202308B1 (de) * 2021-12-21 2024-08-28 Ansaldo Energia Switzerland AG Gasturbine für ein kraftwerk mit vormischbrenner versorgt mit üblichen und hochreaktiven brennstoffen sowie verfahren zu deren betrieb

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US20180216828A1 (en) 2018-08-02
CN107923612A (zh) 2018-04-17
EP3314165B1 (de) 2021-01-13
WO2017029101A1 (en) 2017-02-23
CN107923612B (zh) 2020-06-26
EP3314165A1 (de) 2018-05-02

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