Disc dryer with preheating device

The utility model discloses a disc dryer with a preheating device, which relates to the field of disc dryer equipment and comprises a dryer main body, a feeding hopper is arranged at the top end of the dryer main body, a moisture pipe is arranged at one side of the feeding hopper at the top end of the dryer main body, and a second motor is arranged below the dryer main body. A supporting frame isarranged on the outer side of the feeding hopper. Through the arrangement of the steam outlet pipe, the preheating pipe, the feeding hopper, the first motor, the stirring shaft and the stirring blades, steam subjected to heat exchange in the drying process enters the preheating pipe through the steam outlet pipe and flows to the feeding hopper in the preheating pipe to preheat materials in the feeding hopper, and meanwhile the first motor is controlled to operate; the stirring shaft and the stirring blades are driven to rotate to stir the materials, so that the materials are in full contact with steam heat, the heatin