Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Fluidized bed
Patent
1987-11-27
1991-08-27
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Fluidized bed
34 57A, 422144, 422311, F27B 1510, F27B 1508
Patent
active
050431455
ABSTRACT:
The present invention contemplates an improved grid for fluid bed reactors which minimizes catalyst coking in fluidized catalytic cracking operations by shedding catalyst dispersed through the grid from feed risers located therebelow. Indeed, the grid has a central portion containing a plurality of orifices therein and a downwardly extending annular ring portion for shedding catalyst outwardly and downwardly for collection and removal from the reactor vessel.
In the preferred embodiment of the present invention, the grid consists of a convex upper grid and a concave lower plate joined together and defining a disengaging zone therebetween. At least one riser opens into the disengaging zone for introducing the material to be fed into and separated in the reactor. The upper grid includes a solid annular ring which extends outwardly and downwardly from the point at which the upper grid and the lower plate are joined.
REFERENCES:
patent: 2422262 (1947-06-01), Russel, 3rd
patent: 2651565 (1953-09-01), Bergman
patent: 2990260 (1961-06-01), Mungen
Bober, Jr. Michael
Lietz Arthur A.
Terry Patrick H.
Wickman William L.
Yanowitz Arthur
Dvorak Joseph J.
Exxon Research & Engineering Company
Santiago Amalia L.
Warden Robert J.
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