2.1 The loading cylinder of raw materials will be equipped with heating jacket,and heat insulation layer will be equipped outside the jacket,which will prevent the heat be transferred ,and also reduce the heat loss. Discharge hole is equipped with the lower part of the cylinder, on the top of the cylinder with two feeding holes and an air exhaust outlet.When feeding,the raw materials should be fed equally from the two feeding holes,the best feeding capacity is about 60%-80% of the volume of the cylinder,the max feeding capacity should not exceed 80%,otherwise will affect the smooth discharge of gas evaporation .When the sticky raw material is feeding,the feeding capacity should be reduced, to prevent the drive motor overloaded, damage to equipment.
2.2 Hollow shaft is set inside the center of of the cylinder,in heating medium will be put into the shaft( like hot conduction oil or hot water).
2.3 On the hollow shaft distributed with oar blades with certain angle,the oar blades are also hollow within heating transferred,inlet and outlet of hot oil conduction are equipped inside of the blades,to ensure the heat transfer efficiency during the drying
2.4 Seals: Packing seals are equipped during shaft and cylinder.
2.5 Transmission:Except the special models,we normally apply the chain or gear transmission style.Pivot bear apply duplex bearing combination ,with tapered roller bearing and deep groove ball bearing combined,to meeting the requirements of radial and axial force.

Vacuum harrow dryer equipment is designed for drying slurry, pasty, powdery materials, thermosensitive materials requiring low-temperature drying, easily oxidized materials, as well as explosive materials, toxic materials and the materials whose organic solvents should be recovered. This vacuum drying equipment is applied to the pharmaceutical, nourishment, food, chemical and other industries.