Exhaust gas recirculation type gas turbine equipment and combined cycle power generation equipment equipped with the gas turbine equipment

摘要

PROBLEM TO BE SOLVED: To contrive stable operation of an exhaust re-circulation type gas turbine system with a simple structure by uniformly mixing the exhaust gas and fresh air so as to be supplied to a compressor without increasing the size of the facility for re-circulating the exhaust air. SOLUTION: This gas turbine system is provided with a compressor 1 for compressing air for combustion introduced through a filter 11, a combustion device 20 for igniting air compressed by the compressor 1 in the presence of a fuel and for supplying the high-temperature and high-pressure gas to the gas turbine, and an exhaust re-circulation duct 10 for taking a part of the exhaust gas after driving the gas turbine such that a part of the exhaust gas is mixed with fresh air so as to be used as the air for combustion. In this case, the exhaust port of the exhaust re-circulation duct 10 is connected to the upstream side of the filter 11.