Drying and gas or vapor contact with solids – Apparatus – Houses – kilns – and containers
Patent
1995-05-15
1997-06-03
Kwon, John T.
Drying and gas or vapor contact with solids
Apparatus
Houses, kilns, and containers
34215, 34217, F26B 1900
Patent
active
056342810
ABSTRACT:
An apparatus for drying moist solid or semi-solid materials, such as sewerage sludge, municipal waste, industrial waste, agricultural waste, and the like, includes a dryer unit having a plurality of stacked heating chambers, each of the heating chambers above the lowest heating chamber having a conveyor belt for transporting the material through the associated heating chamber and depositing it on a lower heating chamber, the lowest of the stacked heating chambers including a conveyor belt for transporting the material therethrough and discharging the material from the dryer unit. The apparatus utilizes a combination of convective heat transfer, in the form of a heated gas which rises upwardly through the dryer unit through successive heating chambers, and radiative heat transfer, provided by radiative heating units disposed above the conveyor belt in each heating chamber. The speed of the conveyor belts can be individually controlled to allow more effective utilization of the drying and material handling capacity of the drying apparatus. The stacked heating chamber arrangement results in a more compact dryer which requires less floor area than a dryer having a single linear heating chamber. The stacked heating chamber arrangement also results in lower heat losses through the walls, floor, and top of the dryer housing.
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Kwon John T.
Universal Drying Systems, Inc.
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