CLASSIFICATION OF PARTICLES WITHDRAWN FROM A FLUIDISED BED

摘要

An air classifier system for classifying bed particles includes a drop tube (9) leading from a reaction chamber (2) and communicating with a discharge tube (12) in which is located a gas ejector (16). The classifier (18) in which air is used as an aerodynamic sieve to entrain particles of an acceptable size for return through the conduit (14) to the bed (4). Oversize particles descend through the classifier (18) for discharge into a receptacle (28).