Air system for continuous flow grain dryer

摘要

In a continuous flow vertical grain dryer, heated air is supplied into a closed top plenum through means of a stack opening upwardly therein, and fresh air is supplied to the stack from as nearly as practicable fines-free ambient atmosphere by receiving the fresh air from a relatively fines-free ambient atmosphere zone, e.g., above the discharge from the vertical pervious wall of the dryer of spent grain-drying air. Efficient heat transfer and preheating of the fresh air by association of a fresh air duct with the stack is provided for.