Grain dryer adopted downstream drying process crafts and used hot air as a heat medium for grain drying. The internal is mainly composed of the ventilation inlet section and the angular air box.

The outside of angular-box is full of grain, grain flows from top to bottom, hot air entered from the ventilation inlet section and download through the grain layer, exhaust gases discharged through the angular box.

Hot air and grain flows in the same direction, this is called downstream. When the hot air through the grain layer, it will transfer heat and moisture with grain: hot air transferred the heat to grain particles that lead the temperature of grain particles raised, water evaporation into the air, as exhaust discharged

Dried hot grain flowed down to the section of the tempering, after tempering the inner and outer segment of the grain’s temperature and moisture tend to balance, to achieve uniform precipitation.

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