GAS AND STEAM TURBINE INSTALLATION

摘要

A gas and steam turbine installation (1) comprising a waste heat steam generator (30) arranged downstream from the gas turbine (2) on the flue gas side, whereby the heating surfaces are connected to the water-steam circuit (24) of a steam turbine (20). A gasification device (132) is arranged upstream from the combustion chamber (6) of the gas turbine for integrated gasification of a fossil fuel (B) via a fuel line (130). An installation such as the inventive gas and steam turbine installation (1) should also be able to operate with a particularly high degree of efficiency when oil is used as a fossil fuel (B). According to the invention, a heat exchanger (150) is arranged in the fuel line (130) on the primary side, when seen in the direction of flow of the gasified fuel (B), upstream from a mixing device (146) that adds nitrogen (N2) to the gasified fuel (B), whereby said heat exchanger is configured on the secondary side as an evaporator for a flow medium. The heat exchanger (150) is connected to the combustion chamber (6) of the gas turbine on the steam side.