External fluid catalytic cracking unit regenerator plenum manifold

Claim 1

For use in a regeneration chamber of upright circular construction in which a finely divided particulate catalyst is at least partly coated with a carbon material residue from its prior use as a catalyst is accumulated and the catalyst is found in a portion of the chamber in a dilute phase mixed with flue gases, the improvement comprising at least two cyclone separator means in the regeneration chamber, each having an inlet means communicated with the regeneration chamber for receiving a mixture of flue gas and particulate catalyst thereinto and wherein said cyclone separator means separates the flue gas and catalyst which are discharged through separate outlet means; an externally located flue gas plenum on the exterior of the regeneration chamber for said cyclone separator means for collecting flue gases therefrom and communicating the flue gas to a point of disposal; and a generally vertically directed standpipe connected to each of said cyclone separator means and also connected to said plenum, said stand pipe passing through a wall of the regenerator chamber and which includes: an internal metal pipe; an insulation coating thereon; and, hanger means connected to said pipe and extending therefrom and adopted to be connected at an exterior point to a fixed structural support.