Patent ID: 7587133
Filing Date: 2009-09-08
Classification: F22B,Y02P

Abstract:
1. A method for starting a power plant of the type having a gas turbine, a steam turbine and a continuous-flow steam generator, comprising: positioning the steam turbine downstream of the gas turbine and applying heat exhausted from the gas turbine as a heating gas in the steam generator by: (i) providing an evaporator continuous-flow heating surface that is arranged in a heating gas duct through which the flow is capable of flowing in an approximately horizontal heating gas direction, and which comprises a number of steam generator tubes connected in parallel to allow a flow medium to flow through; and (ii) providing a superheater heating surface that is connected downstream of the evaporator continuous-flow heating surface on the flow medium side and which comprises a number of superheater tubes connected in parallel to allow the evaporated flow medium to flow through, and (iii) positioning the evaporation end point of the flow medium in the superheater tubes to temporarily limit the temperature of the flow medium at an exit of the superheater heating surface while starting up the steam turbine.