Separating and stripping device and its use in catalytic...

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 45/12 (2006.01) B01J 8/00 (2006.01) B01J 38/04 (2006.01) B01J 38/06 (2006.01) C10G 11/18 (2006.01)

Patent

CA 2302475

The invention concerns a device for separating and stripping a mixture of gas and particles, comprising a shell (51) including separation (2) and circulation (3) chambers distributed around a reactor (1), each separation chamber (2) comprising in its upper part, an inlet (20) communicating with the reactor and with a zone (21), for rotating the mixture in a vertical plane, each separation chamber (2) comprising two side walls (24) which are also the walls of the circulation chambers (3), at least one of the walls (24) of each chamber (2) comprising a lateral outlet (5) mixing the gas and the particles in the adjacent circulation chamber. Each separation chamber comprises an opening (6) for an axial outlet of the particles into the stripping chamber (30), the shell (51) further comprising a conduit (14) for evacuating a gas-particles mixture connected to at least a secondary separator (16), the stripping chamber communicating with the conduit (14) via the circulation chamber (3). The invention is applicable to catalytic cracking of hydrocarbons on a fluidised bed in and ascending and/or descending reactor.

On décrit un dispositif de séparation et de stripage d'un mélange de gaz et de particules, comprenant une enveloppe (51) comportant des chambres de séparation (2) et de circulation (3) réparties autour d'un réacteur (1), chaque chambre de séparation (2) comportant en sa partie supérieure, une ouverture (20) d'entrée communiquant avec le réacteur et avec une zone (21), de mise en rotation dans un plan vertical du mélange, chaque chambre de séparation (2) comportant deux parois latérales (24) qui sont aussi les parois des chambres de circulation (3), au moins une des parois (24) de chaque chambre (2) comportant une ouverture (5) latérale de sortie faisant mélange du gaz et des particules dans la chambre de circulation adjacente. Chaque chambre de séparation comporte une ouverture (6) pour une sortie axiale des particules dans une chambre de stripage (30), l'enveloppe (51) comprenant en outre un conduit (14) d'évacuation d'un mélange gaz- particules raccordé à au moins un séparateur secondaire (16), la chambre de stripage communiquant avec le conduit (14) via les chambres de circulation (3). Application au craquage catalytique d'hydrocarbures en lit fluidisé dans un réacteur ascendant et/ou descendant.

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