ACOUSTIC DRYING OF COAL
- 1 September 1988
- journal article
- research article
- Published by Taylor & Francis in Drying Technology
- Vol. 6 (3) , 501-514
- https://doi.org/10.1080/07373938808916395
Abstract
The influence of acoustic energy in drying of high ash coal in association with thermal energy is studied. The variables used in the experiments are air temperatures 70°C and 120°C, acoustic intensities 120, 135 and 145 dB for different grain sizes ranging from 44 to 1000 microns (µm). It is established that the drying process in coal is feasible above a critical sound pressure level given by P=125+10 log f (f is the acoustic frequency in KHz). Removal of moisture in coal is enhanced with time, intensity of sound and air temperature. The drying rate is more pronounced for coal with particle size range 149 to 297 microns.Keywords
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