What is a Fluidized Bed Dryer?
A fluidized bed dryer (also called a fluid bed dryer) is a process equipment used extensively to reduce the moisture content of food, pharmaceutical, chemical powder, and granules.
The machine is known for drastically decreasing the drying time of drug compounds, typically greater than 50 microns, used for tablets and capsules.
Traditionally, manufacturers used trays and vacuum dryers to remove moisture from Active Pharmaceutical Ingredients.
Both Tray and Vacuum Dryers are insulated tray chambers placed on top of each other in trolleys. The material to be dried is placed in the trays. Electric heaters and blow fans ensure heat transfer by circulating hot air in tray dryers.
A vacuum dryer operates below atmospheric pressure, and steam is passed through the annular space between a jacket and the vessel walls.
While effective in practice, these manual and semi-mechanical processes significantly increase drying time, thus increasing production batch time. This ultimately reduces the production capacity of the plant. Moreover, conventional dryers require an extended downtime for maintenance and operational management.
A fluid bed dryer, on the contrary, uses fluidization where the material is converted from a static solid-like state to a dynamic fluid-like form.
A Fluidized Bed Dryer is composed of a stainless-steel chamber having a detachable perforated bottom called the bowl. The steady air stream lifts and suspends the wet solids. The resultant heat transfer vaporizes the moisture, preparing solid particles for further processing.
Anish Pharma is one of the most trusted Fluidized-bed processor manufacturers in India.
We have implemented innovative and practical research using computational fluid dynamics (CFD). CFD validation boosts the accuracy of velocity and temperature via precise control of process parameters.
Desiccant dehumidifiers also help to drive down the drying time. A desiccant dehumidifier has separate centrifugal fans for process air intake and exhaust. The humid air passes through ~75% of the rotor face area. After crossing the rotor, the resulting air is dry because the absorption process has extracted the moisture to the silica gel.