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
  • F23R3/36—Supply of different fuels
• • 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
  • 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
  • F23R3/286—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
  • 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 head with egg ⁇ nem central housing, extending in the axial direction through the central housing ⁇ lzucreamtechnisch which is fluidly connected to a plurality of Olaustrittsö réelle, one spaced from the central housing and arranged the central housing annularly surrounding conical skirt defining, together with the central housing, an annular channel and a plurality of vanes extending within the annular channel between the central housing and the conical skirt and forming a swirl blading. Furthermore, the invention relates to a burner with such a burner head and to a turbine arrangement with at least one such burner.
• Burners and their burner heads are known in the prior art in a variety of configurations. They are used in various combustion plants, such as in turbine arrangements or the like. Increasing requirements for the reduction of pollutants require a continuous improvement of the burner designs. In particular, the NOx content in the exhaust gas must not exceed upper limit values. Of the
• NOx content in the exhaust gas is mainly influenced by the mixing ratio ⁇ ratio of fuel and air, by the fürmi ⁇ schungsgrad and by the degree of utilization of the combustion. A complete combustion of the fuel is to be strived for in order to Minimie ⁇ the pollutant content.
• the aforementioned mixing of fuel and air in the primarily by the geometry and alignment of the fuel nozzles, through which the oil is supplied to, and imposing ⁇ enced by a swirl of the combustion air, in which the oil is injected.
• the fuel nozzles are in a known burner design in ⁇ laustritts- Used openings that are ⁇ forms at the free end of an oil lance, which extends centrally in the axial direction through a central housing of a burner head and the oil supply line forms.
• a diagonal lattice Drallbeschaufe ⁇ system is provided which is disposed in an annular channel surrounding the burner head of the burner, which is flowed through by a majority of the combustion air.
• Axialgitter swirl blading is arranged, through which the remaining combustion air is passed.
• the Axialgitter is formed by the central housing of the burner head annular vice ⁇ Bende conical skirt which defines together with the central housing a ring channel, and by a plurality of vanes which extend inside the annular passage between the central body and the conical skirt.
• the present invention provides a burner head of the aforementioned type, which is characterized in that the oil outlet openings are arranged distributed at a radial distance from the central housing over the circumference of Brennerkop ⁇ fes and connected via at least one oil connection line with the oil supply , In this way, a distributed and decentralized oil injection into the combustion air realized, which leads to a better mixing of fuel and combustion air compared to a local and central oil injection.
• the at least one oil connection line preferably extends through a guide vane.
• the at least one oil connection line discharges into an annular oil distribution channel of the burner head, which is provided radially outward of the conical skirt, in which the oil outlet openings are formed circumferentially distributed.
• the oil outlet openings are preferably designed such that they deliver oil substantially in the radial and / or substantially in the axial direction.
• the central housing, the guide vanes and the oil distribution channel are advantageously arranged substantially concentric with each other. In this way, a simple structure he ⁇ aims.
• the oil distribution channel is made according to an embodiment as a separate component and welded to the free ends of Leit ⁇ blades. Such an arrangement is easy to manufacture and assemble.
• the burner head preferably has fuel gas supply passages on with opening into the defi ned ⁇ between the central body and the conical skirt annular channel fuel gas outlet openings. Such a burner head can then be operated optionally with fuel gas or with oil.
• the fuel gas supply passages extend at least partially through the vanes, the openings Brenngasaus ⁇ advantageously formed at least partially in the dig ⁇ Leit. In this way, use decentralized and well distributed fuel gas supply is realized, which is accompanied by ei ⁇ ner good mixing of fuel gas and combustion air.
• the gas inlet openings of the Brenngaszu Swisskanäle are arranged on the outer circumference of the central housing. Accordingly, the fuel gas is supplied through the outer periphery of the central housing and not through the central housing.
• Such an arrangement is to the advantage that it can be completely dispensed with a oil lance, since only oil is passed through the central cavity of the housing.
• the oil outlet openings and / or the fuel gas outlet openings are at least partially provided with fuel nozzles.
• the vorlie ⁇ ing invention also provides a burner with a burner head according to the invention.
• the present invention provides a Turbi ⁇ nena arrangement with at least one inventive burner.
• FIG. 1 shows a schematic cross-sectional view of a burner head according to an embodiment of the present invention
• Figure 2 is a schematic perspective view of the in
• FIG. 3 shows a perspective view of that in FIG. 1
• burner head are positioned in the oil outlet openings according to a further variant of the present invention.
• the burner head 1 forms part of an unspecified Darge ⁇ presented burner for a furnace, for example, for a furnace system of a turbine assembly.
• the burner head 1 comprises a central housing 2, which is provided with an axially extending and unilaterally open cavity defining an oil feed line 3.
• Spaced from the central housing 2 has a conical skirt 4 is provided, which surrounds the central body 2 ring-shaped ⁇ prepares and finishes de- together with the latter an annular duct. 5
• a plurality of Leit ⁇ blades 6, which form in a known manner, also referred to as Axialgitter swirl blading.
• annular oil distribution channel 7 Radially outward of the cone skirt 4, an annular oil distribution channel 7 is provided, which is connected to the oil supply line 3 provided in the central housing 2 via oil connection lines 8 extending through the individual guide vanes 6.
• the oil distribution channel 7 has distributed over its circumference a plurality of oil outlet openings 9, via which the oil distributor channel 7 is discharged via the oil supply line 3 and the oil connection line 8 oil supplied.
• the ⁇ laus ⁇ outlet openings 9 are each provided with fuel nozzles, although this is not shown in detail in the present case.
• the burner head 1 further comprises fuel gas supply channels 10, which extend through the wall of the central housing 2 and through the guide vanes 6.
• the fuel gas inlet openings 11 are each on a front side of a radially outward protruding annular shoulder 12 of the central housing 2 is arranged ⁇ .
• the fuel gas exhaust ports 13 are provided in those portions of the fuel gas supply passages 10 that extend through the vanes 6.
• the central housing 2 and the guide vanes 6 are integrally formed in the illustrated embodiment of the burner head 1.
• the oil distribution channel 7, whose réelle insectsfla ⁇ che defines the conical skirt 4, is made as a separate component and connected to the free ends of the guide vanes 6 cohesively. It should be understood, however, that the burner head 1 can in principle also be produced in other ways.
• Figures 2 and 3 show possible arrangement variants of the oil outlet openings 9.
• the oil outlet openings 9 are circumferentially distributed on the outer peripheral surface 14 of the oil distribution channel 7 provided so that they deliver oil substantially in the radial direction.
• the ⁇ laus ⁇ outlet openings 9 are positioned on the annular-shaped end face 15 of the oil distribution channel 7, so that they deliver oil in Wesentli ⁇ chen in the axial direction.
• the oil outlet openings 9 are provided both on the outer circumference surface 14 as well as on the end face 15 of the ⁇ lvertei ⁇ lerkanals. 7
• the burner head 1 is supplied via the oil supply line 3 oil, which passes through the oil connection lines 8 in the oil distribution channel 7. From there, the oil is then injected through the oil outlet openings 9 in the swirling combustion air, which has previously passed the arranged in the burner head 1 Axial ⁇ grid or the present case not shown diagonal grid of the burner.
• the oil is distributed gleichmä ⁇ SSGIs and delivered locally to the turbulent combustion ⁇ air, creating a very good mixing is achieved.
• the fuel gas is supplied via the fuel gas supply channels 6 and discharged through the fuel gas outlet openings 13 into the annular channel 5, where it is mixed with the combustion air passing through the annular channel 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)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (2)

Cited By (2)

Families Citing this family (1)

Citations (2)

Family Cites Families (2)

• 2014
  • 2014-04-01 DE DE102014206139.3A patent/DE102014206139A1/de not_active Ceased
• 2015
  • 2015-03-19 WO PCT/EP2015/055766 patent/WO2015150089A1/de active Application Filing

Patent Citations (2)

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