Stepped multi-stage particle waste heat recycling device

The invention discloses a stepped multi-stage particle waste heat recycling device. The stepped multi-stage particle waste heat recycling device comprises a particle grading mechanism, an air distribution mechanism and a box body; the box body is provided with a particle inlet, a particle outlet, an air inlet and an air outlet; the particle grading mechanism comprises a particle inlet flashboard,a first rotary plate, a second rotary plate, a third rotary plate and a slag discharging pipe; the particle inlet flashboard is located below the particle inlet and located above the first rotary plate; the first rotary plate is located above the second rotary plate; the second rotary plate is located above the third rotary plate; the first rotary plate, the second rotary plate and the third rotary plate are all porous plates and can rotate around self rotation shafts correspondingly; the slag discharging pipe is arranged on the particle outlet; and the air distribution mechanism comprises a header pipe, a first branch pipe, a second branch pipe and a third branch pipe; and outlets of the branch pipes are formed below the rotary plates. According to the stepped multi-stage particle waste heat recycling device, the mode of combining multi-stage rotary plate turning with branch pipe precise air distribution is adopted, and particle grading sufficient cooling can be achieved.