Drying    Warm air is blown through a perforated distributor to rapidly and gently dry materials until the required residual moisture content is reached. Moisture evaporated from the product is exhausted with the drying air.   

Batch Fluid Bed Dryer    When drying fine wet solids in a fluid bed the speed of the air flow supports the particles and transforms them into a fluid-like state. Once in this state, the external surface of each particle is exposed to the heated moving air which creates a heat and mass transfer. Heat is transferred to the particles in order to evaporate the liquid and mass is transferred as a vapour into the moving air. Heat transfer in a fluid bed dryer takes place by convection which is the transfer of heat from one point to another. This has the effect of removing the solvent from the particles and exhausting the moisture laden air away from the product container. The air used to fluidise the product bed is normally heated so that the heat transfer process is very rapid. Batch drying time and good fluidisation are controlled by the inlet air temperature and the air flow volume. The higher the inlet air temperature, the greater capacity it has to hold vapour. The correct level of air flow volume will maintain the fluid state of the product bed and minimise any attrition.   

Special features:   

• Selection of air distributors   * Short process time