Solid fuel gasification - in externally heated tubes fed through fluidised bed at fluctuating gas and mechanical pressure

摘要

In a gasification system for solid fuels with an inherent moisture content is externally heated, horizontal or slightly inclined tubes, the fuel is first charged on a fluidised bed. The fluidised bed is exposed to a pulsating pressure by the carrier gas pulses, and also by vibrating diaphragms, arranged in the wall facing the tube entries. The rate at which the fuel is directed through the tubes can be controlled by altering the frequency of the pulsations or by adding restrictors at either end of the tubes. This system has few mechanical parts so that there is little wear. The fluidised bed in which no chemical reactions take place is simple to mfr. and simple to operate. The feed rate can be readily adjusted.