Patent ID: 6475267
Filing Date: 2002-11-05
Classification: B01D,F23C,F23D

Abstract:
A system for removing gas from a stream of a mixture of gas and particulate solids, said system comprising:a separation vessel having an upstream end portion and a downstream cowl section, the upstream end portion having an inlet for introducing the stream tangentially into the vessel to separate centrifugally from the stream (i) a rich portion, comprising a solids-rich mixture, proceeding along a helical path at an outer annular portion of the separation vessel to the cowl section, and (ii) a lean portion, comprising a solids-lean mixture, proceeding along a helical path at an inner portion of the separation vessel to the cowl section; multiple helical ports through which the rich portion proceeds axially through the cowl section, without significantly losing its momentum, to be discharged axially from the separation vessel; and multiple passages between the helical ports through which the lean portion proceeds radially outwards to be discharged from the separation vessel.