Fluid Bed Systems

FLSmidth Minerals fluidized bed technology is used for dryers, reactors, and coolers. The Hydro-Aire unit is a versatile heat processer ideally suited for a wide variety of applications involving cooling, drying, heating, low temperature calcining, and steam generation. It is equally suitable for indirect-air preheating and other heat transfer processes where conduction-type heat transfer is desired. The Hydro-Aire fluidized bed unit includes internal coils for transfer of heat to or from these coils

A fluid bed dryer air system typically consists of an entering air blower, cyclone, vent fan, secondary dust collection equipment, and interconnecting ductwork. The source of the heat can be either direct or indirect. Feed to the dryer is usually by means of a belt or vibrating pan feeder through a chute in the side of the dryer. Discharge is typically via an overflow weir. Final product moisture is a function of the bed temperature and the retention time.

A fluidized bed reactor utilizes "in bed" burning of fuel as opposed to a dryer, where heat is furnished to the bed from an external source. These systems are used for calcining, roasting, high temperature materials processing and incineration applications where the processing temperature is above the ignition point of the fuel.