| 摘要 |
<p>IN THE UNITED STATES PATENT AND TRADEMARK OFFICE PATENT APPLICATION OF: GORDON R. WICKER FOR: A METHOD OF AUTOGENOUSLY DRYING COAL There is disclosed a method for drying coal, particularly sub-bituminous coal in a packed bed configuration, wherein coal is ventilated by an oxygen-containing gas so hat there is a heated zone wherein autogenous drying occurs. In particular, counter current ventilation is used to accomplish preheating, drying and evaporative cooling in three contiguous subzones. The process for drying provides for regulating the movement of coal and the flow of incoming air so as to achieve by exothermic oxidation a temperature not greater than 250.degree.F.</p> |
