| 摘要 |
A fossil-fired steam generator for a steam power station includes a number of economizer, evaporator and superheater heating surfaces forming a flow path through which a flow medium flows in a plurality of pressure stages. In a high-pressure stage, an overflow line is connected to the flow path on its inlet side and leads to an injection valve disposed upstream in the flow path from a superheater heating surface in a medium-pressure stage on the flow medium side. The overflow line has two supply lines of which a first supply line branches off on the flow medium side upstream from a high-pressure preheater and a second supply line branches off on the flow medium side downstream from the high-pressure preheater.
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