Advanced Humid Air Gas Turbine System

摘要

One of the objects of the invention is to provide a water-saving type advanced humid air gas turbine system (AHAT) that can decrease the amount of makeup water to be supplied from the outside, by reducing the amount of water consumed when the gas turbine system is starting up, shut down, or subjected to load rejection.;The AHAT includes a gas turbine system; a heat recovery steam generator for generating steam by use of exhaust gas from a turbine; a water recovery system for recovering moisture contained in the exhaust gas; a first steam system for supplying steam, coming from the heat recovery steam generator, to a compressed air header; and a second steam system for supplying steam, coming from the heat recovery steam generator, to the heat recovery steam generator or the water recovery system. The gas turbine system includes a compressor, the compressed air header for generating humidified combustion air, a combustor for generating combustion gas, and the turbine. 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.

主权项

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 for sake of combustion so as 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 for supplying steam, coming from the heat recovery steam generator, to the compressed air header; and a second steam system for supplying steam, coming from the heat recovery steam generator, to the heat recovery steam generator or the water recovery system, 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.