| 摘要 |
1. A combined gas turbine and steam power plant comprising at least one gas turbine set (1) having an exhaust gas steam producer (10) connected to it on the gas side and comprising a feed water preheater (16), an evaporator (14) and a superheater (12), the plant also comprising at least one steam producer (30) heated independently of the gas turbine set by combustion-supporting air and fuel and having a feed water heater, an evaporator and a superheater (32), the water-carrying and steam-carrying pressure systems of both steam producers (10, 30) being interconnected on the inlet side (bifurcation 61) and on the outlet side, the connection on the outlet side extending to a common steam turbine (36), so that the steam turbine (36) can be operated with steam from the two steam producers (10, 30) simultaneously or with steam just from the exhaust gas steam producer (10) alone or with steam just from the independent steam producer (30) alone, characterised in that a feed water preheating system common to the two steam producers (10, 30) os provided between the bifurcation (61) and the outlet of the steam turbine (36) and comprises a number of preheaters (18, 60, 20, 46, 24, 44) which are connected in series on the water side and which are so constructed and arranged that, of any two preheaters in immediate consecutive relationsship on the water side, one is heatable by exhaust gas from the gas turbine (4) and the other by bled steam of the turbine (36), final preheating of the feed water occurs downstream of the bifurcation (61) in the exhaust gas steam producer (10) and in the independently heated steam producer (30) and the outletside connection between the pressure systems is disposed after the final superheaters (12, 32) of the two steam producers (10, 30). |
