Gas turbine combustor and gaseous fuel supply method for gas turbine combustor
AssigneeHitachi, Ltd.
InventorsHiromi Koizumi, Tomohiro Asai, Hiroshi Inoue, Tsunemasa Nishijima, Hidetaro Murata
Life of this patent
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Abstract
A combustor includes two upstream parts of fuel supply system supplying gaseous fuels of two types having different heating values from each other, a three-way fuel transfer valve merging the two upstream parts of fuel supply system with each other, a plurality of gaseous fuel supply subsystems supplying a combustion chamber with the gaseous fuels supplied through the three-way fuel transfer valve and branched, and a plurality of burners injecting, corresponding to each of the gaseous fuel supply subsystems, the gaseous fuel supplied from the gaseous fuel supply subsystem into the combustion chamber.
Claims3
A combustor comprising:
- two upstream parts of fuel supply system for supplying gaseous fuels of two types having different heating values from each other;
- a three-way fuel transfer valve for merging the two upstream parts of fuel supply system with each other;
- a plurality of gaseous fuel supply subsystems for supplying a combustion chamber with the gaseous fuels supplied through the three-way fuel transfer valve;
- a plurality of burners for injecting, corresponding to each of the gaseous fuel supply subsystems, the gaseous fuel supplied from the gaseous fuel supply subsystem into the combustion chamber;
- and
- a low Btu gas-exclusive subsystem disposed in parallel with the gaseous fuel supply subsystems, wherein:
- the low Btu gas-exclusive subsystem includes:
- a gaseous fuel flow control valve for adiusting the flow rate of the low Btu gas;
- a gas shutoff valve disposed upstream of the gaseous fuel flow control valve;
- and
- a purge subsystem disposed downstream of the gaseous fuel flow control valve.
A combustor comprising:
- two upstream parts of fuel supply system for supplying gaseous fuels of two types having different heating values from each other;
- a three-way fuel transfer valve for merging the two upstream parts of fuel supply system with each other;
- a gaseous fuel pressure regulation valve for regulating pressure of the gaseous fuels supplied through the three-way fuel transfer valve;
- a plurality of gaseous fuel supply subsystems for supplying a combustion chamber with the gaseous fuels supplied through the gaseous fuel pressure regulation valve;
- a gaseous fuel flow control valve disposed in each of the gaseous fuel supply subsystems, the gaseous fuel flow control valve being adapted to adjust a gaseous fuel flow rate;
- and
- a plurality of burners for injecting, corresponding to each of the gaseous fuel supply subsystems, the gaseous fuel supplied from the gaseous fuel supply subsystem into the combustion chamber, wherein:
- one of the plurality of gaseous fuel supply subsystems includes branches branched downstream of the gaseous fuel flow control valve and a gas shutoff valve disposed in the branches.
Dependencies are inferred from the claim text.