Fly ash drying device

The utility model provides a fly ash drying device. The drying device comprises a horizontally-arranged drying cylinder, a heat insulation cylinder fixedly arranged on the outer wall of the drying cylinder in a sleeving mode and coaxial with the drying cylinder, a heat recovery mechanism arranged on the heat insulation cylinder, and a heat insulation box fixedly connected to the lower portion of the heat insulation cylinder through a connecting block. the hot air circulation mechanism is arranged in the heat insulation box, the air outlet end of the hot air circulation mechanism is communicated with the lower right portion of the heat insulation cylinder through an air outlet pipe, and the air inlet end of the hot air circulation mechanism is communicated with the lower left portion of theheat insulation cylinder through an air inlet pipe; a rotational flow plate is fixedly connected into an interlayer space between the heat insulation barrel and the drying barrel, and the rotationalflow plate is spirally arr