Engine waste heat comprehensive recovery system

The invention relates to an engine waste heat comprehensive recovery system. The engine waste heat comprehensive recovery system comprises a condenser I, a single-screw expander, a power generator, an engine tail gas exhaust gas exhaust pipe, an evaporative heat exchanger, a working medium pump, an engine tail gas exhaust pipe, a solution pump, a solution heat exchanger, an engine connected cooling water pipe, a first generator, a condenser II, a throttle valve, an evaporator, an absorber, a second generator, an engine connected tail gas exhaust gas exhaust pipe and stop valves A, B, C and D. The engine waste heat comprehensive recovery system has the advantages that the engine high-grade energy recovery system is used for recovering tail gas with high-grade energy, treated tail gas exhaust gas and low-grade energy engine cooling water jointly serve as a heat source to drive a lithium bromide absorption refrigerator for full recovery of tail gas heat, designed valve group-condenser-evaporator units are used in the engine heat recovery system, the function integrity of the system is improved, and the purposes of convenient and rapid operation and easy control are achieved.