Small -scale mobile grain dryer mainly adopts mixed flow drying technology. It mainly makes use of the clean hot air as heat medium to dry grain. The interior of dryers is composed of angular ventilation boxes, which is arranged in a staggered arrangement. The angular boxes are filled with grains flowing downward.

The hot air enters the intake angular box through the grain layer, and passes through the grain layer from above to below. The exhaust gas is discharged through the exhaust angular boxes. The hot air and grain flow concurrently and counter currently with gran flow, which is also called mix flow. When the hot air passes through the grain layer, it has heat and moister transfer with gains.

Then the grains enter the cooling section and get cooled to storage temperature. Eventually the dried materials will be discharged through outlet.

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