Steam pocket blow-down water heat optimization system

The utility model provides a steam pocket sewage heat optimizing system which comprises a steam pocket, a sewage discharging pipeline is arranged at the bottom end of the steam pocket, a sewage discharging valve is arranged on the sewage discharging pipeline, a sewage discharging pump for pumping sewage to a hot water pool of a circulating water field is arranged on the sewage discharging pipeline, the side portion of the steam pocket is connected to a flash tank through a branch pipeline, and the branch pipeline is connected to a water outlet of the flash tank. The bottom of the flash tank is connected to a blow-off water return tank through a flash tank water outlet pipeline, a circulating pipeline is arranged on the side part of the blow-off water return tank, a heat exchanger is arranged on the circulating pipeline, and a pipeline is arranged at the bottom end of the blow-off water return tank and is communicated with a blow-off pipeline. The device has the advantages of recycling heat of sewage discharge