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Grain Damage and Dust Generation in a Pressure Pneumatic Conveying System

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Transactions of the ASAE. 29 (3): 0840-0847. (doi: 10.13031/2013.30238)
Authors:   Kevin D. Baker, Richard L. Stroshine, Kevin J. Magee, George H. Foster, Robert B. Jacko

ABSTRACT -DAMAGE to shelled corn conveyed in a pneumatic handling system was studied with a system similar to those used on farms to convey grain from a high temperature dryer to storage bins. Effects of operating parameters, system configuration, and grain brittleness on grain damage and dust production were evaluated. Fines produced varied from 0.04 to 1.43% of the weight of grain conveyed. This is similar to levels produced by bucket and drag conveyors. Dust released from the cyclone varied from 0.0095 to 0.135% of the weight of grain conveyed. Dust production and damage were approximately twice as large for brittle corn as for non-brittle corn. Dust production and percent fmes increased exponentially with air velocity above 20 m/s. Feed rate had little effect upon damage. Breakage susceptibility, broken kernels and kernel damage increased slightly as a result of handling. Use of a velocity compensator and cyclone decelerator reduced damage when feed rate or distance conveyed were drastically reduced.

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