SYSTEM DESCRIPTION:
The SFBD is used for Drying of powders and particulates (Capable of being fluidised) with cGMP compliance. The System is based on Air suspension technology. The main unit consists of the following
a) Air inlet chamber
b) Process containers equipped with sandwich plate construction.
c) Expansion chamber cum Filtration chamber.
Powders / Granules to be processed are suitably filled into the process bowl. Substrates are fluidised and dried in expansion chambers with heated air supplied through filters of 10 Micron and 5 Microns & 0.3 HEPA. During fluidisation process the filter bag may be alternately shacked to ensure non-adherence of fines generated from process. Exhaust blower evacuates fluidising air through suspended substrates with in processing chamber(s).
During a typical batch, the material to be dried is charged into the Container of the Dryer and sealed with main processing chamber.
The filtered and heated air is introduced into the Inlet Air Plenum. The Plenum distributes the process air across the fluidizing plate that separates the product from the Plenum. Based on the module selected, the distribution and proportions of in-flowing air varies contingent upon the Aerator Plate at the bottom of the product container.
The fluidizing air assures uniform contact of discrete particle with drying air, suspending, lifting and maintaining the feed in fluidized state.
Fluidization also provides a random pattern of particle motion promoting air mixing with in the process chamber.
Once the process air has transferred its energy to the material it enters the Expansion Chamber, where the air stream decelerates allowing entrained particles to fall out of suspension and downward due to gravity. The cyclic pattern is continued until the desired results are attained.
The process is interspersed at programmed intervals for cleaning the Exhaust Air Filter bag located above the expansion zone. There by retaining the entrapped fine particulates within the processing chamber.