Waste heat recovery device and waste heat recovery method thereof

The invention relates to the technical field of waste heat recovery, in particular to a waste heat recovery device which is characterized in that two sets of supporting plates dividing a shell body into a heat exchange cavity and two sets of transmission cavities are clamped in the shell body, a liquid inlet pipe is arranged at the upper end of the heat exchange cavity, and a liquid outlet pipe is arranged at the bottom end of the heat exchange cavity; the shell body comprises a heat exchange adjusting mechanism and a heat exchange strengthening mechanism, the heat exchange adjusting mechanism comprises a heat efficiency control module and an anti-skid guarantee module, the heat efficiency control module can select the heat exchange contact area according to the temperature of hot air and increase the heat exchange efficiency, and the anti-skid guarantee module is used for guaranteeing the stability of the heat efficiency control module after adjustment and avoiding slipping. By designing the anti-skid guaran