This paper analyzes the energy waste in the clean and hydrophobic system of Huaneng Hanfeng power plant and the damage to the C-wall of the steam room.Proposes a modification plan to install a set of nozzles and two layers of spray discs inside the clean drain expansion container and add a multi-stage water seal cylinder between the clean drainage tank and the inlet pipe of the condensate pump

analyzes the effect of the transformation

considers that the scheme achieves the purpose of recycling the drain water of the steam engine room

solves the damage problem of the C-wall of the steam room

greatly reduces the start and stop times of the clean drain water pump

solves the problem of frequent replacement of spring loading valve

and ensures the stable operation of the clean drain system.