Drying Brown Coal in Steam-Heated, Steam-Fluidized beds
- 1 January 1983
- journal article
- research article
- Published by Taylor & Francis in Drying Technology
- Vol. 2 (2) , 219-234
- https://doi.org/10.1080/07373938308959826
Abstract
Removal of moisture in steam-fluidized, mainly steam-heated, fluidized beds makes possible significant energy savings over conventional forms of large-scale drying. The systems are described and their application to brown coal is reviewed. In this application the use of the system to permit meeting diurnal variation in power-station output, and the use of triple-effect drying to minimise coal usage and to avoid the necessity of recovering in the turbines the energy in the steam from the last dryer are discussed. Moisture-equilibrium of brown coal in superheated steam is reported. To facilitate the rapid adoption of the systems proposed, studies are being made of heat-transfer to dried coal, of moisture equilibrium in pressurized and vacuum systems, and of the use of carrier solids for drying lump materials.Keywords
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