The five belt conveyor dryer being studied has a belt length of
20 m, a belt width of 3 m and an effective drying area of
300 m2
. The belt consists of a wire mesh with an aperture
width of 1.5 mm 2.0 mm and a free flow area of 96.4%
through the belt. It was assumed that the sides of the belts
were sealed to the wall to prevent leakage airflow. The five
belts are positioned horizontally one above the other, have an
air supply from both sides of each belt and are divided into
three temperature zones (Fig. 1). The location of the positioning
flap, which separates the airflow and sends it to the
left and right pressure chambers that supply air to the drying
chamber, is depicted in Fig. 1. This flap is important for the
equal distribution of the airflow, and in Fig. 1 it is shown in a
0 angle position. In front of the flap there is a fire trap, which
divides the airflow before the flap. The so-called pressure
chamber on both sides of the dryer distributes the air along
the whole length of the belt.