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US 8,127,549 B2Granted
Burner and gas turbine combustor
AssigneeHitachi, Ltd.
InventorsKeisuke Miura, Hiroshi Inoue, Kazuhito Koyama, Takeo Saito, Satoshi Dodo
Life of this patent
Estimating the term…
Abstract
A burner is provided that has high flame stability and reduces NOx emissions. In the burner, air holes of an air hole member have a central axis inclined relative to a burner central axis. The leading end portion of a first fuel nozzle is configured to be able to suppress turbulence of air-flow flowing on the outer circumference side of the first fuel nozzle. The tip of the first fuel nozzle is located on a fuel jetting-out directional downstream side of the inlet of the fuel hole. The tip of the second fuel nozzle is located on a fuel jetting-out directional downstream side of the air hole inlet.
Claims7
A burner comprising:
- an air hole member provided with a plurality of air holes arranged in a plurality of concentric rows on a combustion gas flow directional upstream side of a chamber adapted to generate combustion gas;
- and
- fuel nozzles adapted to jet out fuel to the corresponding air holes from a fuel jetting-out directional upstream side of said air hole member, an inlet center of each of the air holes being located on a central axis of a corresponding one of said fuel nozzles;
- wherein the air holes of said air hole member are each formed to have a central axis inclined relative to a central axis of the burner;
- a first fuel nozzle has a leading end portion configured to be able to suppress turbulence of air-flow flowing on an outer circumferential side of the first fuel nozzle, and a tip of the first fuel nozzle is disposed on a fuel jetting-out directional downstream side of the air hole inlet;
- and
- a second fuel nozzle has a tip disposed on a fuel jetting-out directional upstream side of the air hole inlet.
4 more elements
A burner comprising:
- an air hole member provided with a plurality of air holes arranged in a plurality of concentric rows on a wall surface, on a combustion gas flow directional upstream side, of a chamber adapted to generate combustion gas;
- a plurality of fuel nozzles each disposed to face a corresponding one of the air holes and adapted to jet out fuel from a fuel jetting-out directional upstream side of said air hole member, an inlet center of each of the air holes being located on a central axis of a corresponding one of the fuel nozzles;
- a fuel header adapted to distribute fuel to said fuel nozzles;
- and
- a fuel header housing section adapted to housing said fuel header therein and provided with an air inflow hole on the fuel jetting-out directional upstream side of said fuel header;
- wherein the air holes in a first row from a burner plane center of said air hole member have an air hole central axis inclined relative to a burner central axis;
- tips of said fuel nozzles are each disposed in the vicinity of an inlet of the air hole adapted to receive air flowing thereinto from the air inflow hole;
- a leading end portion of a first fuel nozzle is tapered and a tip of the first fuel nozzle is inserted into a corresponding one of the air holes in the first row;
- and
- a tip of a second fuel nozzle is disposed on the upstream side of inlets of the air holes in the first row.
7 more elements
A combustor comprising:
- a pilot burner disposed on a combustion gas flow directional upstream side of a combustor liner;
- and
- an annular premix burner disposed on an outer circumferential side of said pilot burner;
- wherein said pilot burner includes:
- an air hole member provided with a plurality of air holes in a plurality of concentric rows;
- and
- fuel nozzles adapted to jet out fuel to a corresponding one of the air holes from a fuel jetting-out directional upstream side of the air hole member, an inlet center of each of the air holes being located on a central axis of a corresponding one of the fuel nozzles;
- and
- wherein the air holes in a first row from a burner plane center of the air hole member have an air hole central axis inclined relative to a burner central axis;
- a leading end portion of a first fuel nozzle is tapered, and a tip of the first fuel nozzle is disposed on a downstream side of inlets of the air holes in the first row;
- and
- a tip of a second fuel nozzle is disposed on an upstream side of inlets of the air holes in the first row.
9 more elements
Dependencies are inferred from the claim text.