Waste heat recovery mechanism

The utility model provides a waste heat recovery mechanism, which relates to the technical field of waste heat recovery and comprises a waste heat barrel. The interior of the waste heat barrel is hollow, the waste heat barrel communicates with a urea heat supply pipeline and a waste heat recovery pipeline, and four superconducting metal pipes are installed in the waste heat barrel in a surrounding mode. Nine flow guide baffles are installed in the waste heat barrel in an up-down arrangement mode, and the superconducting metal pipes are connected with the flow guide baffles. When high-temperature gas generated by urea production enters the heat exchange cavity through the heat inlet pipe orifice, the high-temperature gas heats liquid circulating in the superconducting metal pipe, so that the heated liquid in the superconducting metal pipe flows into the waste heat recovery pipeline, the heat recovery effect is achieved, the recovered heat can be used for heat supply and power generation, and the heat exchange