Allgaier dispersion dryers are perfect for handling fine powders that have a very high moisture content and that will disintegrate during drying. It is also suitable for material that can be pneumatically conveyed.
The material is dried within a few seconds, meaning that the thermal load to which it is subjected is minor. Dispersion dryers can be used virtually in all industrial sectors.
The dispersion dryer consists of a stationary cylindrical enclosure that is split by a perforated distribution plate. The drying air enters through a port underneath the distribution plate and flows upward in a spiral pattern.
The wet material is fed from above through a downcomer onto a quickly rotating impeller and dispersed through the air by the airflow. By using a variety of impellers, clumping materials with a high moisture content are efficiently disintegrated. The intensive circulation of the material and drying air maximizes the transfer of heat and mass, achieving significantly more efficient drying than would be possible with a conventional flow dryer.
The dried end product is discharged through downstream cyclone separators or fine particle filters.