SEALING SYSTEM FOR CYCLONE LEG

摘要

A system for sealing the leg of a cyclone for separating out solids in gas/solid suspension is described. More specifically, the present invention relates to a system for sealing the legs of two stages of cyclones in series used in fluid catalytic cracking (FCC) processes, comprising a terminal configuration which makes use of a long-radius curve (31) which is devoid of moving parts, which changes the flow direction of the descending mass flow of catalyst in dense phase into a plane orthogonal to the ascending gaseous flow, which prevents the entry of gaseous phase inside the leg (24), and which promotes efficient sealing and preventing the "packing-down" of the dense bed of particulates.