Improved fcc unit catalyst stripper

Details Improved fcc unit catalyst stripper Improved fcc unit catalyst stripper

C - Chemistry, Metallurgy

10

G

C10G 11/18 (2006.01) B01J 8/00 (2006.01) B01J 8/34 (2006.01) C10G 35/14 (2006.01)

Patent

CA 2272995

An improved stripper section design (20) is provided for use in fluid catalytic cracking (FCC) units. The stripper section contains means for imparting rotational movement to the FCC cracking catalyst as it traverses the stripping section. In one embodiment the stripper section contains at least one rotation vane (50) that is preferably disposed on the surface of a stripper section tray (24). The rotation vane provides angular, rotational movement to the cracking catalyst as it traverses the stripper section. Vertical movement is imparted to the cracking catalyst due to gravity and radial movement is imparted to the catalyst due to the slanted nature of the tray. Through the use of the rotation vanes the contact between the catalyst particles and the stripping steam is increased, thereby improving the overall efficiency of the FCC operation.

La présente invention concerne la conception d'une section de strippage améliorée (20) destinée à être utilisée dans des unités de craquage catalytique fluide. La section de strippage comprend des moyens qui confèrent au catalyseur de craquage fluide un mouvement rotatif au moment où il traverse ladite section. Dans un mode de réalisation, la section de strippage comprend au moins une ailette rotative (50) disposée de préférence sur la surface d'un plateau (24) de la section de strippage. L'ailette rotative permet au catalyseur de craquage d'effectuer un mouvement angulaire rotatif lorsqu'il traverse la section de strippage. La gravité confère au catalyseur de craquage un mouvement vertical, et la nature inclinée du plateau lui donn un mouvement radial. Le contact entre les particules du catalyseur et la vapeur de strippage augmente avec l'utilisation des ailettes rotatives, améliorant ainsi le rendement global de l'opération de craquage catalytique fluide.

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