Based on the injection technology, the steam system energy-saving technology - heat pump condensate recovery device that makes the low-pressure steam booster, high-pressure steam energy-saving and pressure-reducing, and recovery low pressure flash steam is successfully developed by Shenyang Fei Hongda Energy Saving Technology Development Center. The technology is due to the short payback period of equipment investment, good recycling effect, high energy-saving benefit, welcomed by users. It is understood that enterprises often produce large amounts of industrial steam condensate and flash steam, so far there is no ideal recovery method. Heat pump condensate recovery complete set of devices from the flash tank, steam jet heat pump, anti-cavitation pump, electric control cabinet and other components. The principle is driven by steam with higher pressure. The steam is sprayed by supersonic jet of heat pump nozzle, the low-pressure flash steam is sucked in, expanded and diffused, and the steam with a certain pressure is output for use, so as to achieve the purpose of recovering flash steam. The device is installed below the flash tank anti-cavitation pump group, so that the condensate water hit back to the recovery, the pump does not produce cavitation. The main advantages of the device are as follows: the steam jet heat pump is used to suck the flash steam of the high temperature condensate water and boost the utilization of the steam, so that the available steam volume is larger than the steam output of the boiler, the boiler thermal efficiency is improved, the condensate and flash steam are recovered, the energy saving effect Significant; flash tank in a low pressure state, reducing the trap back pressure is conducive to the recovery of condensate; as flash steam is recycled, the complex structure of the trap can be canceled, eliminating labor and maintenance costs. It is understood that the device is also suitable for other occasions to boost the recovery of gas recovery