Oxygen-containing gas distribution apparatus employed in fluidiz

Details Oxygen-containing gas distribution apparatus employed in fluidiz Oxygen-containing gas distribution apparatus employed in fluidiz

1976-04-09

1977-06-28

Tayman, Jr., James H.

Chemistry: physical processes

Physical processes

Crystallization

23288S, 23284, 252417, 252419, 34 57A, 208163, 208164, 423DIG16, 239556, 239558, 239601, B01V 824, B01V 2390

Patent

active

040323005

ABSTRACT:
An oxygen-containing gas distribution apparatus is dicslosed which can be employed in the fluidized bed regeneraton of carbon-contaminated catalysts, such as cracking catalysts.Said apparatus comprises a plurality of gas discharge nozzles affixed to at least one manifold member substantially horizontally disposed at the lower end of the regeneration chamber, said nozzles being restricted in internal cross-sectional area in their upstream portion connected to the manifold member and expanded in the internal cross-sectional area of their downstream portion such that a) the numerical ratio of the difference between the diameter of the downstream portion and the diameter of the upstream portion divided by the length of the downstream portion taken in the direction of gas flow does not exceed 0.18 and b) the ratio of the diameter of the upstream portion to its length taken in direction of gas flow does not exceed 1.67.

REFERENCES:
patent: 2798030 (1957-07-01), Hettick et al.
patent: 3053642 (1962-09-01), Huntley et al.
patent: 3309784 (1967-03-01), Adams
patent: 3912460 (1975-10-01), McGann

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