Method of autogenously drying coal

Details Method of autogenously drying coal Method of autogenously drying coal

1983-08-15

1985-01-15

Yuen, Henry C.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

432 14, F26B 308

Patent

active

044931573

ABSTRACT:
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 that 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.

REFERENCES:
patent: 3985516 (1976-10-01), Johnson et al.
patent: 4192650 (1980-03-01), Seitzer
patent: 4213752 (1980-07-01), Seitzer
patent: 4324544 (1982-04-01), Blake
patent: 4325833 (1982-04-01), Scott

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