초록 ▼

An improved combined cycle power plant (10) having a plurality of kettle boilers (30,31,32) used in sequence for cooling the compressed air being directed via line (29) to cool portions of the gas turbine (20). The kettle boilers remove heat from the compressed air and produce a plurality of steam f

An improved combined cycle power plant (10) having a plurality of kettle boilers (30,31,32) used in sequence for cooling the compressed air being directed via line (29) to cool portions of the gas turbine (20). The kettle boilers remove heat from the compressed air and produce a plurality of steam flows in lines (70,71,73) at pressures in parallel with the heat recovery steam generator (41,42,43) steam flows. Steam in line (72) for cooling other portions of the gas turbine is maintained at a very high level of purity by providing a high rate of blowdown through line (65) from the steam drum (45) providing the steam. Heat from the blowdown flow is directed to heat exchanger (66) to heat incoming fuel gas from source (26), or alternatively to heat the condensate via line (74) during periods of fuel oil operation.

대표청구항 ▼

[ We claim as our invention:] [1.] A combined cycle power plant comprising:a combustion turbine system having a compressor for providing compressed air, a combustor for combusting a fuel in said compressed air to produce combustion air, and a gas turbine for expanding said combustion air to produce

[ We claim as our invention:] [1.] A combined cycle power plant comprising:a combustion turbine system having a compressor for providing compressed air, a combustor for combusting a fuel in said compressed air to produce combustion air, and a gas turbine for expanding said combustion air to produce mechanical energy and exhaust gas;a steam generator having an inlet for receiving said exhaust air and a plurality of sections located sequentially in a flow path of said exhaust gas for removing heat from said exhaust gas to produce a first plurality of steam flows at a plurality of pressures;a steam turbine having a plurality of inlets for receiving said first plurality of steam flows;a cooling air flow path for directing a portion of said compressed air to said gas turbine for cooling of a portion thereof;wherein said cooling air flow path further comprises a plurality of boilers arranged in sequence for receiving said portion of said compressed air and for removing heat from said portion of said compressed air to produce a second plurality of steam flows.