Process for injecting particulate material into a fluidized bed reactor

摘要

A process is described for feeding particulate material to a fluidized bed reactor (14) comprising:- (a) feeding the particulate material to a device (5) that mixes and aerates the particulate material; (b) passing the particulate material downward from the device (5) to a fluidized bed reactor (14) by means of a standpipe (9), said standpipe (9) having a bend before the particulate material is introduced into the fluidized bed reactor (14), said bend having an angle greater than the angle of repose of the particulate material; and (c) injecting gas into the particulate material at one or more locations before the bend in the standpipe (9), said injecting being made in an amount sufficient to decrease the relative gas-solids velocity in the standpipe (9) so that fluidization of the particulate material is prevented.