METHOD AND DEVICE FOR DRYING SOLID MATERIALS Russian patent published in 1997 - IPC

FIELD: drying solid materials, solid fuel, in particular. SUBSTANCE: method of drying solid material containing no less than 98 percent of evaporated substance, water in particular, consists in feeding solid material to indirectly heated vortex chamber. Solid material is swirled by means of vortex medium. Evaporated substance is used in form of steam. Dried and evaporated substance is discharged afterwards. Temperature of fluidized bed is set depending on kind of evaporated substance contained in solid material discharged from vortex chamber. Solid substance at high content of evaporated substance is fed to fluidized bed and dried solid material is distance from fluidized layer. Temperature shall correspond to curve of boiling of evaporated substance contained in solid material discharged from vortex chamber. Device used for realization of this method consists of drier 2 with vortex chamber 5, solid material feeder 1, device 3 for loading solid material in drier 2, mechanical dust separator 9 for reduction of content of solid particles in vapor evacuated from drier and vapor recirculating devices. Feeder 1 is provided with devices for stageless control of consumption of solid material depending on temperature of fluidized bed. EFFECT: enhanced efficiency. 21 cl, 1 dwg