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US 2001/0042369 A1Published application
Steam cooled type combined cycle power generation plant and operation method thereof
OwnerOsamu Wakazono, Yasushi Fukuizumiinventors
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Abstract
A combined cycle power generation plant comprises a waste heat recovery boiler (20) having a stabilizing burner (25) at an upstream position thereof. The stabilizing burner is ignited during the time of start-up and speed increase of a gas turbine (11) so that steam generation at the waste heat recovery boiler is accelerated. The steam is used effectively for cooling the gas turbine, driving a steam turbine, and for gland steam. In addition, exhaust steam from the steam turbine is also used to cool the gas turbine. Consequently, the time for the plant to reach a full load can be shortened.
Claims8
A power generation plant comprising:
- a gas turbine unit including a gas turbine having a high temperature portion with a cooling component;
- a steam turbine unit;
- and
- a waste heat recovery unit including a waste heat recovery boiler having a stabilizing burner at an upstream position in said waste heat recovery boiler, said stabilizing burner being operable to create steam during at least one of a start-up period of operation and a speed-increasing period of operation of the power generation plant, said waste heat recovery boiler being operable to generate steam using waste heat from said gas turbine unit, wherein the steam generated by said waste heat recovery boiler drives said steam turbine unit, and wherein at least one of a portion of an exhaust steam from said steam turbine unit and a portion of the steam generated by said waste heat recovery boiler flows through said cooling component of said high temperature portion of said gas turbine so as to cool said high temperature portion.
1 more element
Dependencies are inferred from the claim text.