STT40 / STT70
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
Functional description
