Drying unit for solid wet powder containing low-melting-point solvent

The invention relates to a drying unit for solid wet powder containing a low-melting-point solvent. The drying unit comprises a vacuum belt type dryer. The vacuum belt type dryer comprises a closed main tank body transversely distributed. The drying unit is characterized in that a feeding port in the front end of the main tank body is connected with a bottom discharging port of a granulating machine through a first sealing valve, and a top feeding port of the granulating machine is connected with a bottom discharging port of a vacuum feeding tank through a second sealing valve; a discharging port in the rear end of the main tank body is sequentially connected with a pulverizing machine, a third sealing valve and a discharging middle bin; and an exhaust port of the main tank body is connected with a vacuum pumping and solvent recycling system. A microwave heater used for drying materials on a material distributor and materials adjacent to the front end portion of the conveying belt is arranged at the position,