Reduced elevation catalyst return line for a fluid catalytic...

Details Reduced elevation catalyst return line for a fluid catalytic... Reduced elevation catalyst return line for a fluid catalytic...

B - Operations, Transporting

01

J

B01J 8/00 (2006.01) B01J 8/26 (2006.01) C10G 11/18 (2006.01)

Patent

CA 2693437

The present invention is an improved regen-erated catalyst bend assembly for a fluid catalytic cracking unit. In one embodiment, the regenerated catalyst conduit (200) for fluidly connecting a regenerator standpipe (55) to a reactor riser (1) of a fluid catalytic cracking unit compris-es: a) a first bend with a bend radious, R1, and an inlet end and an outlet end; and b) a second bend with a bend ra-dious, R2, and an inlet end and an outlet end; wherein the inlet end of the first bend is physically connected to the outlet end of the regenerator standpipe (55), the outlet end of the first bend is physically connected to the inlet end of the second bend, the outlet end of the second bend is phys-ically connected to the inlet end of the reactor riser (1), and R1 is not equal to R2. I another embodiment, the conduit comprises a bend with radius, RREL, and a bend inlet end and a bend outlet end; and b) a conduit inlet end and a con-duit outlet end; wherein the inlet end of the conduit is physically connected to the outlet end of the regenerator standpipe, and the outlet end of the conduit is physically connected to the reactor riser, wherein the centerline of the reactor riser and the centerline of the outlet end of the con-duit are at substantially a 90° angle. The present invention is especially useful in the modification of existing fluid cat-alytic cracking units to lower the elevation of the outlet of the regenerated catalyst return line assembly, thereby pro-viding needed space to increase the fluid catalytic cracking reactor riser length.

La présente invention concerne un ensemble coude de catalyseur régénéré destiné à une unité de craquage catalytique fluide. Dans un mode de réalisation préférée de l'invention, l'ensemble conduit de retour de catalyseur régénéré à hauteur réduite ('RE-bend' ou 'REL-bend') de la présente invention possède une hauteur d'orifice de sortie qui est inférieure à la hauteur de l'orifice d'entrée de l'ensemble conduit de retour de catalyseur régénéré RE-bend ou REL-bend, et un processus d'utilisation de cet ensemble dans une unité de craquage catalytique fluide. La présente invention convient particulièrement pour la modification d'unités de craquage catalytique fluide existantes afin d'abaisser la hauteur de l'orifice de sortie de l'ensemble conduit de retour de catalyseur régénéré, fournissant ainsi l'espace nécessaire pour augmenter la longueur de la colonne montante du réacteur de craquage catalytique fluide.

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