Method for switching over a gas turbine burner operation from liquid to gas fuel and vice-versa
AssigneeALSTOM Technology Ltd
InventorsThiemo MEEUWISSEN, Stanka KOKANOVIC, Susanne Renate SCHELL, Rudolf LACHNER
Life of this patent
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Abstract
A method is provided for switching over a gas turbine burner operation from liquid fuel to gas fuel and vice-versa, with the burner comprising nozzles for feeding a premixed gas fuel, nozzles for injecting a pilot gas fuel and nozzles for injecting a liquid fuel. According to the method, while the liquid fuel and the premix gas fuel are regulated to switch over from liquid fuel to gas fuel operation or vice-versa, the pilot gas fuel is controlled at a substantially constant flow rate.
Claims15
Method for switching over a gas turbine burner operation from liquid fuel (21) to gas fuel (22, 23) and vice-versa, said burner (1) comprising nozzles (6) for feeding a premixed gas fuel, nozzles (8) for injecting a pilot gas fuel (23) and nozzles (9) for injecting a liquid fuel (21), the method comprising:
- regulating the liquid fuel (21) and the premix gas fuel (22) to switch over from liquid fuel to gas fuel operation or vice-versa while
- controlling the pilot gas fuel (23) at a substantially constant flow rate.
Dependencies are inferred from the claim text.