Rotary dryers are a highly efficient industrial drying option for bulk solids. They are often chosen for their robust processing capabilities and their ability to produce uniform results despite variance in feedstock.
Rotary dryers work by tumbling material in a rotating drum in the presence of a drying air. They can also be indirectly heated to avoid direct contact between the material and processing medium.
Heat of compression is a by-product of a compressor. It is typically wasted, because there is no use for it. Rotary drum dryers use this heat to regenerate the desiccant. Little to no additional heat is needed to reach an acceptable dewpoint. This is what makes rotary drum dryers extremely energy efficient.