Deaerator steam discharge heat energy recovering apparatus

A deaerator steam-heat discharge recycling device pertains to the boiler subordinate facility technical field, which is used for solving the problem of the steam-heat discharge waste of the deaerator. The device comprises an ejector, a hot water recycling can and a water pump, the main liquid inlet of the ejector is communicated with a water supply pipeline, a pumping port of the ejector is communicated with a steam discharge outlet of the deaerator, the outlet of the ejector is communicated with the hot water recycling can, the top of the can is provided with a discharge outlet, the outlet of the can is communicated with the water pump, the outlet of the water pump is communicated with the deaerator, when at work, the water supply pressure is the kinetic energy of the ejector, the water supply pressure automatically pumps the discharging steam of the deaerator and enables the discharging steam to be mixed with the cold water supply, the first recycling use of the heat energy of the discharging steam is realized in the process of mixing, and the second recycling use of the heat energy is realized after using the large-volume hot water recycling can to recycle the mixture, meanwhile, the separation of the dissolved oxygen in the mixture is completed; after further arrangement of a heat interchanger in the structure, the device enables the deaerator to experience three times of heat exchange and twice deoxidation, the heat recovery performance is greatly improved. In addition, the device not only can be used for being taken as the deaerator discharge steam heat recycling facility, but also can be used for being taken as the heat supply device of other heat recycling devices.