GAS STEAM COMBINED CYCLE CENTRAL HEATING DEVICE

摘要

The present invention relates to a gas-steam combined cycle centralized heat supply device and a heat supply method. The gas-steam combined cycle centralized heat supply device comprises a gas-steam combined cycle system, a heating network return water heating system and a thermal station, and the gas-steam combined cycle system is connected with the thermal station through the heating network return water heating system; the gas-steam combined cycle system comprises a gas turbine, a waste heat boiler, a direct contact type flue gas condensation heat exchanger and a steam turbine; the gas turbine is connected with the waste heat boiler, and the waste heat boiler is connected with the direct contact type flue gas condensation heat exchanger and the steam turbine; the thermal station comprises a hot water type absorption heat pump and a water-water heat exchanger; the heating network return water heating system comprises a steam type absorption heat pump for recovering flue gas waste heat and a steam-water heat exchanger; and the steam type absorption heat pump for recovering flue gas waste heat is respectively connected with the steam-water heat exchanger, the direct contact type flue gas condensation heat exchanger, the waste heat boiler, the steam turbine and the thermal station, and the steam-water heat exchanger is respectively connected with the waste heat boiler, the steam turbine and the thermal station. The present invention can be widely applied to the industry of power plant waste heat recovery.