Dryers, pilot plant sizes rotary

The method described here is for a plant-size, direct rotary dryer although the technique is applicable to other dryers of granular media as well. In a plant scale, effects of various parameters cannot be studied in depth as one could in a laboratory or pilot-plant size equipment. Hence, such data are not generally applicable. 

In most cases, direct-heat rotary dryers are still sized on the basis of pilot-plant tests, because rarely is all the moisture to be removed truly Tree moisture, and residence time for diffusion is frequently needed. 

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