PREPARATION AND ORGANISATION OF ACTIVE COAL OR COAL FROM ACTIVE ORGANIC SUBSTANCE

摘要

Coke or activated carbon is produced from a moist organic substance, for example from a residue from the production of furfural. Initially the moist organic substance is introduced together with hot flue gases into a drying zone of a cylinder furnace and the organic substance is mixed with the hot gases and dried according to the co-current principle. Subsequent thereto the dried substance and the gases are directed into a coking zone of the same furnace, an oxygen-bearing gas also being introduced into said coking zone and the volatile constituents of the organic substance being reduction burned according to the co-current principle so as to produce a coked product. When coke is to be produced, said coked product is withdrawn together with gases from the trailing end of the furnace and the gases are separated therefrom. When producing activated carbon, the coked organic material and the hot moist gases are mixed with each other in an activation zone according to the co-current principle, and with no additional water vapor added, so as to obtain an activated product and, finally, said product is withdrawn from the furnace and the gases are separated therefrom. Part of the hot gases obtained may be recirculated to the drying zone.