GRAIN DRYER Russian patent published in 2012 - IPC F26B17/12 

FIELD: heating.

SUBSTANCE: grain dryer includes bunker with damper, inclined distributing channels, heat carrier supply and delivery system to internal chamber, vertical drying chambers with internal and external gas-permeable walls, receiving-unloading and metering devices. In drying chambers between internal and external gas-permeable walls there installed are pieces of screw surfaces, for example straight helicoids, with gaps between them, which are adjustable as to height, and their fixed vertical axes are equally spaced from each other by the value approximately equal to distance between gas-permeable walls of drying chambers. The effect consists in the fact that grain flow flowing downwards between walls of drying chambers during drying process smoothly moves from internal walls to external walls and vice versa, due to which uniform heat and moisture exchange process is achieved. Intensity of inversion of grain flows is controlled by changing the distance between pieces along the vertical.

EFFECT: possibility of maintaining necessary drying modes and conditions of materials with various physical and mechanical properties.

2 cl, 7 dwg