Triple Pass Dryer comprises a triple pass drum containing three
concentric cylinders. The biomass bulk material is fed into the
inner cylinder, passes to the middle cylinder and then to the outer
cylinder passing a rolling motion and forming a stable product. The
drum itself has internal flights which lift the bulk material and
allow it to fall through the gas stream resulting in homogeneous
dried biomass.
The Itons Triple Pass Dryer has been developed over a period of
many years and has a unique internal flight design that is proven
for biomass drying. The flights lift and shower the biomass, thus
exposing it to the hot gas stream, and creating resistance to this
stream that results in air classification of the biomass. The air
classification of the biomass allows each particle to dry at own
pace. Bigger wetter wood chips will remain in the Dryer Drum
longer, while lighter drier sawdust will remain a shorter period of
time in the Dryer Drum before exiting at the target moisture
content. This results in optimized conditions for moisture control
and particle conditioning.
