DRUM DRIER Russian patent published in 2003 - IPC

FIELD: drying equipment, in particular, convection driers with a rotating drum, more effectively may be used for drying of granulated, fragile materials in chemical, food, building and other branches of industry. SUBSTANCE: the drier has a drum in the form of a hollow perforated cylinder made for rotation about the longitudinal axis, pipe-line for supply of heat-transfer agent, charging device and a discharge hopper, a tube with holes linked with the pipe-line for supply of heat-transfer agent is installed under the drum, installed inside the drum in a spiral are blades, and the drum is made of a frame consisting of longitudinal guides tied together by spokes and covered with a detachable net. The tube with holes for supply of heat-transfer agent may be made with a shift relative to the vertical longitudinal axis of installed in the end part of the drum drier. Thus, in the offered drum drier granules are not disintegrated, and conditions are created for their motion and lifting to a height not exceeding the drum radius due to the blades installed in the drum. The required height of the layer of granules, drying capacity may be provided by changing the angle of drum inclination and its speed of rotation. Conditions are created for a uniform blow-out of granule by the heat-transfer agent, and the dried material has a high quality. EFFECT: enhanced capacity at reduced consumption of the heat-transfer agent, simplified manufacture and servicing. 3 cl, 2 dwg