Fluid Bed Dryers

for drying, granulating/agglomerating and coating of powders and granules

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  • Fluid Bed Dryer

Unopex Fluid Bed Systems are ideal for drying, granulating/agglomerating and coating applications with top spray and bottom-spray (Wurster) configurations. They offer maximum performance to prepare formulations and to produce small quantities product volumes.

The flexible multi-functional Unopex Fluid Bed Systems offer three processing
options in a single system:

Drying - fluid bed dryers

Drying

The product particles are
fluidized by means of an upward
flowing hot air stream and are
carefully dried until the required
moisture content is reached.

Granulating / Agglomerating

The aim in granulation /
agglomeration is to produce a
dust-free and flowable granulate
from powders.

Granulating / Agglomerating fluid bed dryers
Wurster Coating luid bed dryers

Wurster Coating

The Wurster (bottom-spraying)
technique produces a particularly
uniform surface on the coated
product.

Spray Nozzle

The spray liquid is injected into the
fluid bed via a spray nozzle attached to the spray housing.

Spray Nozzle luid bed dryers

Key features

  • Multifunction operation includes drying, top spray granulation, and bottom spray (Wurster) coating
  • Compact & modular & ergonomic design
  • Simple filling and discharging with easily removable product containers
  • Precise air volume monitoring
  • Quick disconnect plugs for all utilities
  • Simple to operate
  • Simple cleaning due to easy-to-clean design
  • Special air distributor plate for homogeneous product fluidization
  • Continuous blow-back filter cleaning without stopping the process
  • Equipped with PLC control and operator touch panel
  • Turnkey mobile system ready for connection
  • No dead zones in the product container
  • Drying/granulating/coating with two exchangeable product containers
Unopex Fluid Bed Dryer

Working Principle of Fluid Bed Dryers

  • The inlet air is sucked from the outside across prefilter and flows upwards through the machine tower.
  • The prefilter cleans the fresh inlet air and the heater (steam or electric) heating preconditions the air to the desired air temperature.
  •  The heated air flows through the lower section across the mesh sieve of the product container.
  • The spray liquid is injected into the fluid bed via a spray nozzle attached to the spray housing.
  • A bag type filter integrated into the filter housing retains most of the suspended product particles.
  • The process air flows across the exhaust air flap to the exhaust fan unit.

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