Chemical Industry 5rpm Double Conical Rotary Vacuum Dryer

In order to achieve rapid drying at low temperatures, including the drying of deep pores, in a way that does not damage the product, specialized drying technology – vacuum drying – must be used.
The complete product will move into the chamber. The pressure reduces for so long the saturated steam tension is reached. The water will discharge through the vacuum chamber from that point. The raw material is charged in batches & is subjected to indirect heating while at the same time undergoing rotary motion of the cone assembly. The double conical shape of the dryer ensures efficient circulation of hot liquid heating media. Drying takes place when heat flows from the outer cone through a jacket, and vacuum is applied in the inner cone. The drying operation is based on the principle that water or other volatile product moves from a zone of low pressure. This is accomplished by warming the product to be dried to raise the vapor pressure of the absorbed or free liquid by vacuum or by sweeping it with Air or Nitrogen current. Thus the essential conditions for effective drying are achieved by uniform heat transfer throughout the batch and rapid removal of the vapor. The vacuum is applied gradually with PLC control by throttling.
Most times the specific heat from the evaporating product is lower than from the base material. This material ensures that the temperature will drop slowly or even not. The pressure (vacuum) will achieve any part of the product so the moisture will evaporate. For a short period there results in a homogeneous temperature.

DCRD double cone rotary vacuum dryer is applicable for drying and mixing powdery and granular materials in the pharmaceutical, food, chemical, dye and other industries. It is especially suitable for the following materials:
1. Thermosensitive materials that cannot withstand high temperature
2. Easily oxidized and dangerous materials
3. Materials whose solvent should be recovered and materials of poisonous gas
4. Materials required low residual volatile content
5. Materials with requirements on crystal shape