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STT40 / STT70
Functional description 6-19
6.2. Drying Hopper (Optional)
The material is dried in the drying hopper. The
dehumidified air is heated and then conducted
through the material in the drying hopper and
removes moisture. Drying hoppers must have the
appropriate dimensions for their specific use so
that the desired final moisture content is reached.
When refilling a drying hopper, the material must
be dried completely before material can be taken
out for the first time. Time needed to do this is
equivalent to the resonance time (of that material).
If material is taken out continuously, there must
also be a continual addition of material into the
drying hopper (continuous drying process). New
(moist) material is conveyed into the upper
opening of the drying hopper and slowly reaches
the material outlet at the lower end. On its way
from the upper to the lower end, the material is
dried down to the final moisture content.
In order to guarantee a continuous drying process,
we recommend that you always keep the drying
hopper filled completely.
Figure 11: Drying Hopper