硂琌Τ盡舦紀斌矪瞶よ猭〓祘Bailie 阀琌莱赣钡亩碞

Fluidized bed gasifier/combustor systems having separate gasifiers and combustor vessels that allow exothermic combustion reactions to be separated from the endothermic gasification reactions, are known in the art. For example, U.S. Pat. No. 3,853,498 to Bailie, describes a process involving separate gasification and combustion zones. In the Bailie process, both zones are conventional fluid-bed reactors. Published wood throughput values for the Bailie process typically do not exceed 120 lbs/ft.sup.2 -hr. Fluidization would occur typically with inlet gas velocities 1-3 ft/sec to provide good fluidization. Since the Bailie process employs conventional fluid-beds, transfer of circulating sand is by direct flow from fluid-bed to fluid-bed rather than by entrainment and exit out the top of the reaction vessel.