Boiler steam waste heat recycling system

The utility model relates to a boiler steam waste heat recycling system, and belongs to the technical field of steam recycling devices. A lower steam pocket in the boiler is communicated with a regular blowdown expander, an upper steam pocket is communicated with a continuous blowdown expander, a deaerator is installed on a deoxygenated water tank, the upper steam pocket is communicated with the deaerator through a saturated steam pipeline and communicated with a water outlet of the deoxygenated water tank through a deoxygenated water pipeline, and a water feeding pump is installed on the deoxygenated water pipeline. The boiler is communicated with the steam header through a superheated steam pipeline, and the steam header is connected with a production steam pipeline and communicated with the deoxygenated water tank through a self-use steam pipeline. According to the utility model, the flash tank is adopted to recover steam discharged to the air by the deaerator and steam in the periodic blowdown expander an