Patent ID: 6263662
Filing Date: 2001-07-24
Classification: F01K,F02C,F05D,Y02E

Abstract:
A combined cycle power generation plant comprising:a gas turbine plant;a steam turbine plant operatively connected to the gas turbine plant;an exhaust gas heat recovery boiler configured to generate steam for driving the steam turbine plant by an exhaust gas of the gas turbine plant;a high pressure evaporator unit accommodated in the exhaust gas heat recovery boiler, said high pressure evaporator unit being divided into a first high pressure evaporator disposed on an upstream side with respect to an exhaust gas flow and a second high pressure evaporator disposed on a downstream side thereof;a high pressure superheater unit including first, second and third high pressure superheaters disposed in series in this order from downstream to upstream with respect to the exhaust gas flow, said first high pressure superheater being disposed at at least one of an intermediate position between the first high pressure evaporator and the second high pressure evaporator and a position on the downstream side of the first high pressure evaporator with respect to the exhaust gas flow; anda bypass pipe configured to bypass the second high pressure superheater and to connect the first high pressure superheater with the third high pressure superheater.