Principle:
1 Let heat source (for example, low pressure steam or thermal conduct oil) pass through the sealed  jacket. The heat will be transmitted  to raw material to be dried through inner shell;
2 Under driving of power, the tank is rotated slowly and the raw material inside it is mixed continuously.The purpose of reinforced drying can e realizd;
3 The raw material exists is under vacuum. The drop of  team  pressure makes the moisture (solvent) at the surface of  raw material become saturation and will  evaporate. The solvent will be discharged through vacuum  pump an recovered in  time. The inner moisture (solvent) of raw material will infiltrate, evaporate and discharge continuously. The three  processes  are  carried  out unceasingly and the purpose of drying can be realized within a short time.

Features:
1 When oil is used to heat, use automatic constant temperature control. It can be used for drying biology products and mine. Its temperature of operation can be adjusted form 20-160 °C . 
2 Compared to ordinal dryer, its heat efficiency will be 2 times higher. 
3The heat is indirect. So the raw material can not be polluted. It is in conformity with the requirement of GMP. It is easy in washing and maintenance. 

Applications:
    It is suitable for the raw materials that need to concentrate, mixed and dried at low temperature (for example, biochemistry) products in chemical, pharmaceutical and foodstuff industries. Particularly it is suitable for the raw materials that are easy to be oxidized, volatilized and have night heat sensitivity and is toxic and not permitted to destroy its crystal in drying process. 

Technical parameters: