METHOD OF GRAIN DRYING AND AERODYNAMIC GRAIN DRYER Russian patent published in 1997 - IPC

FIELD: agricultural engineering. SUBSTANCE: grain dryer has lower and upper rectangular columns connected to each other and ventilation systems, separate for each column, with air ducts with electric air heaters in suction line of each system, and air ducts for partial evacuation of heat carrier with high moisture content on delivery line of each system. These air ducts serve also for heating more cold heat carrier taken from atmosphere. Ducts are mounted in common heat-insulating housing providing multiple passage of heat carrier through layer of grain in both columns and provided with make-up hopper located over upper column, pit, noria, intermediate dry grain hopper-cooler and also system of air ducts. Effective passage of heat carrier through grain layer in columns is provided by boxes with triangular section end faces arranged in staggered order over entire height and section of both columns and sealed in turn in height from different ends, skipping one row. EFFECT: improved quality of grain drying. 6 cl, 2 dwg