Engine waste heat comprehensive recoverer

The utility model relates to a comprehensive recoverer for waste heat of an engine. The device comprises a heat exchange cavity and a heat inlet cavity, the heat exchange cavity is of a cylindrical structure with the upper end and the lower end closed. A heat inlet cavity matched with the heat exchange cavity in height is fixedly connected to the side part of the heat exchange cavity; a pluralityof flow guide plates which are transversely distributed in a staggered manner are arranged in the heat exchange cavity; a first heat exchange pipe which penetrates through the guide plate from bottomto top and extends out of the upper end surface of the heat exchange cavity is arranged in the middle of the heat exchange cavity; automobile exhaust is purified by the purification liquid and then guided into the heat exchange cavity. A plurality of second heat exchange pipes correspondingly extending to the heat inlet cavity are arranged in the heat exchange cavity, flow guide plates corresponding to the second heat exch