Sterling SDF 250 - Manual (Page 54)

SDF 250/400/500
Functional description 6-17
6.2. Drying Hopper (Optional)
The material is dried in the drying hopper. The
dehumidified air is conducted through the material
in the drying hopper and takes up 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 first be dried completely before
material can be taken out for the first time.
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 conducted 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.
6.2.1. Hopper heaters (optional)
If differing drying temperatures are required in the different drying hoppers, hopper heaters must
be installed on the drying hoppers. The drying temperature of each drying hopper can be set
centrally at the dryer.
Figure 3: Drying Hopper