| 摘要 |
PROBLEM TO BE SOLVED: To provide a feed water system device for a combined cycle plant and an exhaust heat recovery boiler enabling stabilization of operation characteristics by employing standard specifications as the design specifications of a high-pressure feed water pump and enhancing the efficiency of a high pressure feed water pump. SOLUTION: The water feed system device of the combined cycle plant is formed that at least one economizer is situated at a piping system to interconnect a condenser 47 and a lowest-pressure steam drum 36, at least two economizers are situated in a piping system to interconnect the condenser 47 and an intermediate pressure steam drum 78, at least three economizers is situated in the piping system to interconnect the condenser 47 and a highest- pressure steam drum 39, and regarding a flow direction of exhaust gas, two sets or more of at least three economizers connected to the high-pressure steam drum 39 are situated on the side situated stream from the economizer connected to an intermediate-pressure steam drum 78.
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