ProductSpecs
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.
TUBS
Single tubs come in 2 and 5 litre sizes in either stainless steel or glass (see below). A multi-tub is also available for drying four samples at one time. Glass tubs are particularly useful for observing the fluidisation process to establish optimum settings.
An attachment is also available for the efficient drying of test sieves (see right).
|
|
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.