CONVECTION HEATER Russian patent published in 2010 - IPC F26B17/12 

FIELD: heating systems.

SUBSTANCE: convection heater includes vertical shaft of rectangular section with inclined perforated flanges forming zigzag-shaped channel for moving the dried material and individual cavities for supplying drying agent, common headers for supplying and discharging drying agent, receiving hopper, cover, bottom and screw conveyor at the discharge of dried product. New feature of the invention is that receiving hopper is equipped with rotary feeder for charging raw material; shaft consists of frames installed above each other and containing cavities for supplying and discharging drying agent; to each frame there connected are gas ducts for supplying drying agent, on which there arranged are ejectors; throughout the surface of inclined flanges there are holes provided at an angle of 45…50° to plane of flanges; perforated flanges themselves are inclined to horizon at the angle which is less than friction angle between dried product and material of flanges.

EFFECT: improving drying efficiency owing to providing uniform movement of material along the surface of inclined flanges, decreasing metal consumption and overall dimensions of the design, providing reliability, uniformity of operation.

3 dwg