Waste heat recovery system

The invention discloses a waste heat recovery system, which relates to the technical field of industrial energy, is used for recovering heat generated by a multi-stage vane compressor, and comprises an interstage gas heat recoverer and a final-stage gas heat recoverer which are used for recovering heat generated by the multi-stage vane compressor through a working medium; the application heat exchanger is used for heating water correspondingly by using heat recovered by a working medium; the guarantee heat exchanger is used for cooling the working medium after the heat recovered by the working medium is used; the circulating pump is used for enabling the working medium to flow in the waste heat recovery system; the circulating pump is simultaneously connected with input ends of the interstage gas heat recoverer and the final-stage gas heat recoverer through pipelines, output ends of the interstage gas heat recoverer and the final-stage gas heat recoverer are simultaneously connected with the application heat