| 摘要 |
<p>The device is intended for dehydration of heterogeneous materials, such as e.g. sawdust, turf, draff, sludges, biomass, carbon dust etc., especially before subsequent pelletation. The device consists of a set of drying chambers (1) with worm conveyors (2). The material passes through the conveyors in a zig-zag way from the top to the bottom. Drying air is blown into the drying chambers (1) from the side, perpendicular to the worm conveyors (2) axis. The conveyors are equipped with stirring blades (7) and the drying air is used for further heating of fresh air in recuperative unit (16) with the heat exchanger (17) that is connected to the first thermal circuit (20) of the heating appliance (19) with heat-exchange fluid of the temperature up to 200- C. The second thermal circuit (21) heats up the bottoms (11) of the drying chambers (1) by means of the heating units (6). The device is equipped with a control and regulating unit interconnected with humidity, heat and level sensors. The advantage of the device is based on the fact that it may be used universally; it has minimum energy consumption, and allows the dried material to keep its biological values.</p> |
