| 摘要 |
Described is a combination of the technical functional design of a tunnel dryer having continuous closed circulation for determining the drying sequence in products such as wood, fruit and vegetables. The present equipment is smaller than industrial dryers, is versatile since the pilot samples of fixed bed, fluidized bed or longitudinal bed may be dried with the same equipment. The accuracy of the dried sample data is obtained by performing an inner division in the tunnel so that an alternate conduit is formed therein having a flange at each end portion thereof for diverting the drying flow while the operation for charging and discharging the pilot samples are performed or when the flow effect of the drying medium is to be avoided in the record of the sample data. The invention is formed by a rectangular-shaped tunnel, which has ten aluminum modules, which include three elbows with directional plates, two straight ducts and one straight angle duct, a duct for connecting the air inlet to the fan, an asymmetric diffuser located at the fan outlet, and two square/rectangular-shaped transition modules. The rectangular module includes a main duct and a diversion duct.
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