Patent ID: 9677471
Date: 2017-06-13
CPC Classifications: F01D,F01K,F02C,F05D

Claim:
1. An advanced humid air gas turbine system comprising: a gas turbine system that includes a compressor for compressing air, a compressed air header for mixing high-pressure air introduced from the compressor with steam to generate humidified combustion air, a combustor for mixing combustion air from the compressed air header with fuel to generate combustion gas, and a turbine driven by the combustion gas that is generated by the combustor; a heat recovery steam generator for generating steam by use of exhaust gas from the turbine; a water recovery system disposed on a downstream side of the heat recovery steam generator, the water recovery system recovering moisture contained in the exhaust gas; a first steam system comprising: a first steam line from the heat recovery steam generator, to the compressed air header; and a second steam system for supplying steam to mix with an exhaust gas flow within the heat recovery steam generator comprising: a second steam line that is in fluid communication with the first steam line and the exhaust gas flow within the heat recovery steam generator, wherein when the gas turbine system is starting up, shut down, or subjected to load rejection, steam coming from the heat recovery steam generator is recovered by blocking the first steam system and making the second steam system communicate with the heat recovery steam generator.