Liquid fuel steam purge system and method for gas turbine engine
AssigneeGeneral Electric Company
InventorsJose Francisco Aguilar, Francisco Javier Gomez
Life of this patent
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Abstract
A system is provided with an ejector having an outer wall extending circumferentially about a flow path, wherein the outer wall has a throat section along the flow path, and a diverging section downstream from the throat section along the flow path. The ejector includes a gas inlet configured to supply a gas into the flow path, and a water inlet configured to supply water into the flow path. The ejector is configured to produce steam in response to mixing of the water and the gas along the flow path. The system also includes a controller configured to control flows of the gas and the water to produce the steam for a steam purge of a liquid fuel circuit.
Claims20
A gas turbine system, comprising:
- an ejector, comprising:
- an outer wall extending circumferentially about a flow path, wherein the outer wall comprises a throat section along the flow path, and a diverging section downstream from the throat section along the flow path;
- a gas inlet configured to supply a gas into the flow path;
- a water inlet configured to supply water into the flow path, wherein the ejector is configured to produce steam in response to the ejector sucking the water into the gas along the flow path;
- a controller configured to control flows of the gas and the water to produce the steam as a saturated steam for a steam purge of a liquid fuel circuit to a combustor of the gas turbine system.
A system, comprising:
- a liquid fuel circuit;
- and
- a steam purge system configured to purge the liquid fuel circuit with steam, wherein the steam purge system comprises:
- an ejector, comprising:
- an outer wall extending circumferentially about a flow path, wherein the outer wall comprises a throat section along the flow path, and a diverging section downstream from the throat section along the flow path;
- a gas inlet configured to supply a gas into the flow path;
- and
- a water inlet configured to supply water into the flow path, wherein the ejector is configured to produce the steam in response to mixing of the water and the gas along the flow path;
- and
- a controller configured to vent the steam to atmosphere until the steam becomes a saturated steam and to open a flow of the saturated steam through the liquid fuel circuit.
A system, comprising:
- a liquid fuel circuit;
- a gas turbine enclosure configured to house a gas turbine engine comprising a combustor having a fuel nozzle fluidly coupled to a liquid fuel line of the liquid fuel circuit, wherein the liquid fuel line extends to an elevated area vertically above the combustor and/or the fuel nozzle, wherein the elevated area is disposed in a housing outside of the gas turbine enclosure;
- and
- a steam purge system fluidly coupled to the liquid fuel line of the liquid fuel circuit at the elevated area, wherein the steam purge system comprises:
- an ejector, comprising:
- an outer wall extending circumferentially about a flow path, wherein the outer wall comprises a throat section along the flow path, and a diverging section downstream from the throat section along the flow path;
- a gas inlet configured to supply a gas into the flow path;
- a water inlet configured to supply water into the flow path, wherein the ejector is configured to produce steam in response to mixing of the water and the gas along the flow path;
- and
- a controller configured to control flows of the gas and the water to produce the steam for a steam purge of a liquid fuel circuit.
Dependencies are inferred from the claim text.