Device for recovering engine heat of tank car to heat materials in tank car

The invention relates to a device for recovering engine heat of a tank car to heat materials in the tank car. The device comprises a heat storage box, and a particle storage mechanism, a particle filter mechanism and a hot gas isolation mechanism in the heat storage box. The particle storage mechanism comprises a particle storage box, a plurality of pulleys and a plurality of rails. The particle filter mechanism comprises a fixed filter screen and a movable filter screen. A bearing mount is mounted on the fixed filter screen, and a reciprocating screw is mounted on the bearing mount through arotary bearing, The fixed filter screen is further provided with a wind receiving sheet rotating groove. The hot gas isolation mechanism comprises a separating plate and a plurality of venting caps. The venting caps are provided with venting holes, and pressing blocks are installed in the venting caps. The separating plate is provided with vent holes communicating with the interior of the ventingcaps. A mounting bracket i