Process principles
Heat is fed to the product when drying in order to evaporate water
or an organic solvent. Different temperatures and times are required
depending upon the product quality and the desired residual moisture.
As the evaporation of the solvent cools the product, relatively
high temperatures can be used for drying without overheating the
product. At the same time, it is important to mix the product well
during drying.
Drying in the fluid bed (->
Fluid Bed Drying) is a very effective process, as ideal mixing
is achieved very quickly in this case. If only a little water is
to be evaporated, wet granulates can also be dried directly in the Vertical Granulator: (->
Wet Granulation).
For particles difficult to fluidize we have developed the Glatt Spouted Bed Technology.
Requirements for the drying process
- Homogeneous drying
- Dust-free process as far as possible
- Reproducible residual moisture
- Gentle product handling
Drying options
For the drying of granulates, agglomerates and pellets, Glatt offers
systems with different capacities:
Continuous Fluid
Bed Systems with throughputs from 20kg to 5t/h
Spouted Bed Systems with throughputs from 200g to 3t/h
Batch Fluid
Bed Systems with batch sizes from 2g to 1.5t/batch.
Solvent recovery systems for fluid bed processes and vacuum systems
for vertical granulators are available as required for the drying
of organic solvents.
(-> Solvent Recovery)
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