Products - Fluid Bed Dryer

By: Gea Barr-rosin  09-12-2011
Keywords: Drying Systems, Exhaust Gases, Fluid Bed Dryer

The GEA Barr-Rosin Fluid Bed is designed to dry products as they float on a cushion of air or gas.

The process air is supplied to the bed through a special perforated distributor plate and flows through the bed of solids at a velocity sufficient to support the weight of particles in a fluidized state. Bubbles form and collapse within the fluidized bed of material, promoting intense particle movement. In this state, the solids behave like a free flowing boiling liquid. Very high heat and mass transfer values are obtained as a result of the intimate contact with the solids and the differential velocities between individual particles and the fluidizing gas.

Fluid Bed Dryer

For even greater thermal efficiency and where inertisation is required, recycling of exhaust gases can be used. This can be implemented on all our airstream drying systems and retrofitted on customer's existing drying operations.

Contact tubes can be incorporated with non-cohesive materials that can be processed at temperatures approaching the fluid within the tubes. The result is a significant reduction in airflow compared with the typical standard fluid bed.

Many materials begin at or pass through a sticky, softening or cohesive phase during processing. Vibrating beds are extremely effective in keeping the material in a live fluidized state during this transitionary phase.

Batch and continuous units ranging from pilot scale to 300 ft2 (28 m2) have been supplied.

The fluid bed has been used to dry products in many industries including food, chemical, mineral and polymer. A broad range of feed materials including powders, crystals, granules and prills can be processed.

This technology can also be used for cooling applications; either as a separate unit or combined with drying in a single zoned bed.

Open circuit fluid bed dryer / cooler

Keywords: Airstream Drying, Drying Systems, Exhaust Gases, Fluid Bed Dryer, Open Circuit, Perforated Distributor Plate,

Other products and services from Gea Barr-rosin


Rotary Dryer / Rotary Cooler

In the indirect dryer, which is more suited to fine and dusty materials, there is little or no contact between the product and the drying gases since they are heated from the outside, via a stationary jacket fitted with either multiple burners or other external heat source. The directly heated rotary dryer operates on the principle of lifting and showering the product through a hot gas stream moving either in parallel or counter-flow.


Superheated Steam Processor (SSP

The solids are fed into the flow of pressurised superheated transport steam by means of a pressure tight rotary valve, plug screw or similar. The Superheated Steam Processor can be used for drying and/or heat treatment of many products. The Superheated Steam Processor is a closed loop pneumatic conveying system.


Ring Dryer

For slurries, pastes, or sticky materials, our specifically designed feed system allows backmixing of the wet feed with a portion of dry product to produce a suitable conditioned material for feeding into the dryer. This selective extension of residence time enables the Ring Dryer to process many materials which were traditionally regarded as difficult to dry in a Flash Dryer.


Flash Dryer - Pneumatic Drying System

Elevated drying temperatures can be used with many products since the flashing off of surface moisture instantly cools the drying gas without appreciably increasing the product temperature. For slurries, pastes, or sticky materials, backmixing of the wet feed with a portion of dry product to produce a suitable conditioned material is required.



GEA Barr-Rosin supplies industrial drying systems and offers numerous systems and technologies to dry wet materials, ranging from granules, cakes, and powders to sludges, slurries, and solutions. Our systems are custom designed to meet the customer's exact requirements.