Fluid Bed Dryer

Fluid Bed Dryers are used to dry, wet granulated materials attained after the granulation process.  The material is dried through the combination of moisture diffusion from the inside of the granules and the removal of moisture by forced – air convection.

In this unit operation, the granulated material is fluidized by hot & dehumidified air to achieve efficient heat and mass transfer. Fluid Bed Dryer is a batch operation in which the moist material is converted to a free flowing fluidized state by means of an upward flowing hot air stream.

During this process the entire surface of each partical is surrounded by hot air thus achieving a homogeneous distribution of temperature & thereby a rapid drying operation. The air is drawn through a blower fan from outside & passed through 3 stages of filtration (pre, fine & hepa ) & heated with help of  steam coils & or electric heaters. 

The filter bags assembly mounted above the container & retarding chamber keeps the material caught up in the flow of air which subsequently fall back into the container, by means of the outlet air damper as installed in the outlet duct.