COAL GASIFICATION REACTOR WITH A FLUID BED AND METHOD FOR COAL GASIFICATION

摘要

Method and apparatus for production of a combustible product gas from particulate coal in a fluidized bed system. A vertically positioned vessel includes an enlarged upper section and a smaller diameter cylindrical lower separator section, of diameter d, bounded at the bottom by a perforated or porous conical distribution plate (20) inclined at 7 DEG to 15 DEG with respect to horizontal; (the plate may also form an inverted cone). Coal is injected upwardly into or at the top of the separator section through tubular inlets (12) terminating a distance l above the distributor plate. The ratio l/d is less than 2.5. Fluidizing gas is injected into the separator section through the distributor plate, maintaining a fluidization velocity in the separator section of about 1.2 Umf (where Umf is the minimum fluidising velocity). Char and ash particles are separated in the separator section, agglomerated ash being withdrawn from the bottom of the lower separator section and the char may be recycled to the combustion jet above the top of the tubular inlets. IMAGE