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Abstract

A combustible pellet drying system includes a valveless pulse combustor and a drying column. The drying column includes a first drying region and optionally a second drying region. The first drying region receives heated drying gas from the pulse combustor to dry a quantity of moist pellets flowing downwardly through the drying column. Moisture-laden exhaust gas from the first drying region is processed by a condenser to remove water and recover thermal energy therefrom, and to produce a cooled dried exhaust gas which may be reheated by passing through a jacket around the pulse combustor. The reheated dry gas is introduced into the second drying region to further dry the pellets. The second drying region is preferably a downwardly expanding cone configuration. The drying column includes a plurality of temperature sensors. Adjacent temperature sensors may be used to determine a level of pellets within the drying column. The combustible pellets are preferably coal pellets.

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