What is the principle of fluidized bed dryer?
Fluid bed dryers work on the principle of fluidization, a process where a material is converted from a static solid-like state to a dynamic fluid-like state. In this process, hot gas or air is introduced through a perforated distribution plate into the area holding the material.
What is the principle of fluid bed coater?
Principle of operation With fluid bed coating, particles are fluidized and the coating fluid sprayed on and dried. Small droplets and a low viscosity of the spray medium ensure an even product coating.
How does a fluid bed work?
Fluid bed technology is used for cooling, heating and drying of bulk solids materials. Fluid bed heat exchange takes place by passing a gas (most commonly air) through a perforated distributor plate which then flows through a layer (bed) of solids. The air performs two functions.
What is drying in pharmaceutical engineering?
Drying is the process of removing the presence of solvents (i.e. water or other liquids) in a formulation with the presence of heat. The final product of this unit operation is a dry solid mass or powders.
What is dew point in FBD?
The dew point is the temperature to which air must be cooled to become saturated with water vapor, assuming constant air pressure and water content. When cooled below the dew point, moisture capacity is reduced and airborne water vapor will condense to form liquid water known as dew.
What is the advantage of fluidized bed over spouted bed and teeter bed in the drying process?
What is the advantage of fluidized bed over spouted bed and teeter bed in the drying process? Explanation: Distributor provides better distribution of inlet gas for covering the whole bed. 5.
What is Theory of drying?
It is defined as the difference in partial pressure of water vapor in the air and the pressure of the moisture in the product. This is a simple theory of moisture movement during drying. Actually the drying is very complicated phenomenon.