Here is a plan from which you can build a batch-type column drier that will give you continuous drying. One batch of wet grain is dried while a previously dried batch is cooling in the lower cooling chamber. The fan and motor used for drying wet grain and cooling dried grain are enclosed in an airtight shed attached to the drier. Both the cooling chamber and the drying chamber are screened. The fan pulls cool air through the warm, dry grain and pushes heated air through the wet grain, allowing continuous operation of the burner.
When you watch a field of wheat turn from green to golden and wave lightly in the wind, see the shocks lined up in rows as you pass by on the road, watch a load of grain auger into the grain wagon, and then see the cycle begin again. It is beautiful and worth it all.