Fluid Bed  Dryer

The  FBD 2000 offers significant advantages over conventional drying techniques.

High air flow rates provide high rates of heat transfer and ensure much  faster and more homogeneous drying than other methods such as  oven, microwave and vacuum drying. Drying times range from a few seconds to minutes. Complete drying is  usually achieved in under 15 minutes. High air flow thoroughly mixes and separates the particles minimising the risk of abrasion and the formation of lumps. Drying is  achieved at lower temperatures and without hot spots. Settings are accurately repeatable and provide uniform and reproducible results. Materials  with a moisture content of up to 80% may be dried.

How the FBD 2000 operates

A power  fan delivers the high volume air flow from the base unit into a special tub assembly which holds the sample material.

The  flow of heated air passes through a diffuser gauze which supports the bed and evenly distributes the air as it passes into the tub.

A filter bag at the top of the tub keeps the sample in while allowing the air, moisture and gases to escape.

TEMPERATURE CONTROL
Air is heated by a 2kW electric  heater and can be set to any temperature up to 200ºC. The  temperature is controlled by a closed loop system that can achieve  stability to within 1ºC.

TIMED CYCLE
A built in digital timer enables the drying time to be pre-set and the drying operation to be carried out unattended. At the end of the cycle time an alarm sounds and the unit switches off automatically.

AIR  FLOW
The air flow rate and fluidisation velocity are  infinitely variable from 0.4 to 2.4m³/min volume (0.9 to 5 m/sec speed). Optiimum levels can be set by observing the sample behaviour within the glass tubs.

FILTER BAG MATERIAL
Filter bags are usually nylon or terylene with other materials available to suit more aggressive conditions such as sustained high temperature  drying.