Drying and digesting device

The invention relates to the technical field of material digestion, and aims at providing a drying digestion device to solve the technical problem that a digestion device in the prior art is provided with a heating assembly and is low in heat exchange efficiency. The drying digestion device comprises a sealing box and a rotating shaft rotationally assembled in the sealing box, rotating blades are uniformly distributed on the rotating shaft, the rotating shaft comprises an outer cylinder and an inner cylinder assembled in the outer cylinder, and an annular interval is formed between the outer cylinder and the inner cylinder; hollow sleeves are uniformly distributed on the peripheral surface of the outer cylinder, extend in the radial direction outside the rotating shaft and are used for fixing the rotating blades; a plurality of heat conduction pipes for communicating an inner cavity of the inner cylinder with inner cavities of the sleeves are arranged on the inner cylinder, the heat conduction pipes are used