Airflow velocity, resident time, and air temperature can be set to
a wide range of adjustments. Normal operating temperatures are
from
10°f heat rise to 240°f. Special applications can be
constructed for up to
400°f. Air velocity through the bed can be set from 25 fpm
to 200 fpm. Normal operating range is 100 to 150 fpm.
These models are sold as all heat or heat and cool. Heat from the
cool section can be recycled to gain efficiency with certain products.
The bottom conveyor on a heat and cool model is generally extended
longer for the cool section. We refer to this as our B2X models. Standard
widths are 2', 6', and 8' and standard lengths are in increments of
12'. Custom widths and lengths are available.
Product is loaded by various spreading mechanisms at the beginning
of the top conveyor and discharges at the same end with an even number
of conveyors or at the opposite end with an odd number of conveyors.
Product depth can be controlled on each pass due to independent conveyor
speed controls.
These models are usually selected for drying of various feed products,
extruded oilseeds, waste products, and for some food applications.
Multiple-stage/multiple-pass units are also selected for these products
when a higher degree of controllability and quality is necessary. The
single-stage/multiple-pass models can be set in series to custom design
a multiple-stage/multiple-pass design. Air direction can be alternated
and recycled for improved drying.
