PROCESS OF DRYING OF GRAIN AND GRANULATED MATERIALS Russian patent published in 2001 - IPC

FIELD: agriculture. SUBSTANCE: process is intended to dry grain and mixed feed and to dehydrate other loose products and granulated materials. Dried material is fed from above, is circulated and heat transfer agent is blown through dried material. Material is fed layer by layer from above with expansion at angle of more than 2 degrees, heat transfer agent is fed reversibly, outwardly through inlet and inwardly across outlet so that temperature of heat transfer agent across inlet is kept within limits of 50-150 C and across outlet at level of 25-60 C. Heat transfer agent is supplied without dehydration to upper zone of material and dried heat transfer agent or cooled air is fed to lower zone. Material is dried to achieve balanced humidity. For grain products of upper zone heat transfer agent is ozonized with concentration of ozone not less than 2.0-6.8 mg/cu m and not higher than concentration at which effect of inhibition of germination of seeds is achieved. EFFECT: raised quality of dried grain products or granulated polymer materials thanks to regulated condition of motion of material, more complete utilization of potential of drying aggregate. 1 cl, 3 dwg