| 摘要 |
A process for removing moisture from coal comprises transforming the coal to coal fines, polarizing the coal fines to produce an electrical charge differential between the relatively non-conductive water and the relatively conductive coal particles, and removing the water by admixing the coal fines in a drying chamber with a dry gaseous mixture having a different electrical state from the moisture, such that the moisture is selectively attracted to the gaseous media, and then separating the moisture laden gaseous media from the coal fines and collecting the fines. The admixture is accomplished with a vertically oriented cylindrical drying chamber wherein the fines are introduced at the top of the chamber and settle downwardly and the dry, gaseous media is directed upwardly through the chamber in a swirling helical path. The helical path is induced by a series of stepped radial baffle plates spaced along the chamber in the fashion of a spiral staircase, with the gaseous media being introduced through nozzles positioned adjacent the plates. The gaseous media can be dried for reuse in the system after it is removed from the top of the chamber.
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