Stripping and separating apparatus and its use in fluidised bed catalytic cracking

An apparatus for separating and stripping a gaseous mixture and a stream of particles, comprisinga reaction evelope (51) containing a vessel (50) for separating the particles from the mixture and a vessel for stripping the particles located below the separation vessel (50), said separation vessel comprising a plurality of separation chambers (2) and a plurality of circulation chambers (3) distributed axially about one extremity of a central downflow reactor (1a) of elongate form, and disposed in alternating manner about the central reactor in which the gaseous mixture and the particle stream circulates, an upper portion of each separation chamber (2) comprising an inlet opening (20) adapted to communicate with the reactor 1a, so as to separate the particles from the gaseous mixture in a substantially vertical plane, each separation chamber (2) comprising two substantially vertical lateral walls (24) which are also the walls of the circulation chamber (3), at least one of the vertical walls (24) of each chamber (2) comprising a first lateral outlet opening (5) below opening 20 enabling the gaseous mixture to communicate with an adjacent circulation chamber, each separation chamber comprising an outer wall (121) and an inner wall which the lateral walls (24) define an opening (6) for substantially axial outlet for particles located below a first gaseous mixture outlet opening (5), particle outlet opening (6a) communicating below each of the separation chambers (2) with a stripping chamber (8) which contains at least one principal stripping means (11), envelope (51) further comprising at least a one conduit (14) for evacuating a mixture containing gaseous effleunts and a minor portion of particles from the circulation chambers (3), and at least one secondary separator (16) for separating particles from gaseous effluents connected to the evacuation conduit (14) comprising an outlet (19) for gaseous effluents and a particle outlet (17), said stripping chamber communicating with a mixture evacuation conduit (14) via the circulation chambers (3). which are also the walls of the circulation chamber (3), at least one of the vertical walls (24) of each chamber (2) comprising a first lateral outlet opening (5) below opening (20) enabling the gaseous mixture to communicate with an adjacent circulation chamber, each separation chamber comprising an outer wall (121) and an inner wall which the lateral walls (24) define an opening (6) for substantially axial outlet for particles located below a first gaseous mixture outlet opening (5), particle outlet opening (6a) communicating below each of the separation chambers (2) with a stripping chamber (8) which contains at least one principal stripping means (11), envelope (51) further comprising at least one conduit (14) for evacuating a mixture containing gaseous effluents and a minor portion of particles from the circulation chambers (3), and at least one secondary separator (16) for separating particles from gaseous effluents connected to the evacuation conduit (14) comprising an outlet (19) for gaseous effluents and a particle outlet (17), said stripping chamber communicating with a mixture evacuation conduit (14) via the circulation chambers (3).

An apparatus for separating and stripping a gaseous mixture and a stream of particles, comprising a reaction envelope (51) containing a vessel (50) for separating the particles from the mixture and a vessel for stripping the particles located below the separation vessel (50), said separation vessel comprising a plurality of separation chambers (2) and a plurality of circulation chambers (3) adapted to be distributed axially about one extremity of a central upflow reactor (1) of elongate form and disposed in alternating manner about the central reactor in which the gaseous mixture and the particle stream circulate, an upper portion of each separation chamber (2) comprising an inlet opening (20) adapted to communicate with the reactor and with a flow direction change means (130) defined in part by one outer wall of the separation chamber, so as to separate the particles from the gaseous mixture in a substantially vertical plane, each separation chamber (2) comprising two substantially vertical lateral walls (24) which are also the walls of the circulation chamber (3), at least one of the vertical walls (24) of each chamber (2) comprising a first lateral outlet opening (5) below the inlet opening 20, enabling the gaseous mixture to communicate with an adjacent circulation chamber, each separation chamber comprising an outer wall (21) and an inner wall which with the lateral walls (24) define an opening (6) for a substantially axial outlet for particles located below a first gaseous mixture outlet opening (5), particle outlet openings (6) communicating below each of the separation chambers (2) with a stripping chamber (8, 30) which contains at least one principal stripping means (11), envelope (51) further comprising at least one conduit (14) for evacuating a mixture containing gaseous effluents and a minor portion of particles form the circulation chambers (3), and at least one secondary separator (16) for separating particles from gaseous effluents connected to the evacuation conduit (14) comprising an outlet (19) for gaseous effluents and a particle outlet (17), said stripping chamber communicating with a mixture evacuation conduit (14) via the circulation chambers (3).

An apparatus for separating and stripping gaseous mixture and a stream of particles, comprising a reaction envelope (51) containing a vessel (50) for separating the particles from the mixture an a vessel for stripping the particles located below the separation vessel (50), said separation vessel comprising a plurality of separation chambers (2) and a plurality of circulation chambers (3) adapted to be distributed axially about one extremity of a central downflow reactor (1a) of elongate form and disposed, in alternating manner about the central reactor in which the gaseous mixture and the particle stream circulates, an upper portion of each separation chamber (2) comprising an inlet opening (20) adapted to communicate with the reactor (1a) and with a defined in part by one outer wall of the separation chamber and a defector (21) at the base of (130) downflow reactor (1a), so as to separate the particles from the gaseous mixture in a substantially vertical plane, each separation chamber (2) comprising two substantially vertical lateral walls (24) which are also the walls of the circulation chamber (3), at least one of the vertical walls (24) of each chamber (2) comprising a first lateral outlet opening (5) below opening (20) enabling the gaseous mixture to communicate with an adjacent circulation chamber, each separation chamber comprising an outlet wall (121) and an inner wall which with the lateral walls (24) define an opening (6a) for a substantially axial outlet for particles located below a first gaseous mixture outlet opening (5), particle outlet opening (6a) communicating below each of the separation chambers (2) with a stripping chamber (8, 30) which contain at least one principal stripping means (11), envelope (51) further comprising at least one conduit (14) for evacuating a mixture containing gaseous effluents and a minor portion of particles from the circulation chambers (3), and at least one secondary separator (16) for separating particles from gaseous effluents connected to the evacuation conduit (14) comprising an outlet (19) for gaseous effluents and a particle outlet (17), said stripping chamber communicating with a mixture evacuation conduit (14) via the circulation chambers (3).