| 摘要 |
A waste heat steam generator (1) for a gas- and steam-turbine power plant, having a number of economizer, evaporator and superheater heating surfaces (4) which form a flow path (2) and through which a flow medium (M) flows, in which waste heat steam generator an overflow line (20) branches off from the flow path (2) and leads to a number of injection valves (14) which are arranged downstream, at the flow medium side, of a superheater heating surface (4) in the flow path (2), should be particularly highly capable of permitting a brief power increase of a downstream steam turbine without this resulting in an excessive loss in efficiency of the steam process. At the same time, the brief power increase should be permitted independently of the type of waste heat steam generator. For this purpose, the branch location (22) of the overflow line (20) is arranged upstream of the first evaporator heating surface (4) at the flow medium side and downstream, at the flow medium side, of an economizer heating surface (4). |
