Method of heat exchange of solid particles for regeneration in c

Details Method of heat exchange of solid particles for regeneration in c Method of heat exchange of solid particles for regeneration in c

1992-04-20

1994-02-15

Konopka, Paul E.

Catalyst, solid sorbent, or support therefor: product or process

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

208113, 208164, 422144, 502 44, B01J 3830, B01J 3832, C10G 1118, F27B 1508

Patent

active

052866904

ABSTRACT:
The invention relates to a method of and an apparatus for fluidised bed regeneration of a catalyst containing coke.
The catalyst and some of the regeneration fumes are drawn off from the dense bed of a regenerator (1) and are introduced by gravity into an external exchanger at a junction point below the level of the dense bed of the regenerator. Heat exchange is carried out in the lower part of the exchanger (7) below the junction point. From the bottom end of the exchanger up to above the junction point a dense bed zone is created the level of which is established substantially at the height of the dense bed in the regenerator and a zone (15) of suitable size for the escape of regeneration gases and fluidisation gas. The gases and fumes are drawn off into the dilute fluidised phase (18) of the regenerator through a duct (17) while the catalyst is recycled to the dense bed of the regenerator through a different duct (25) from that in which the fluidisation air is circulating.
Application to the regeneration of fluid bed cracking catalysts.

REFERENCES:
patent: 2735802 (1956-02-01), Jahnig
patent: 4434245 (1984-02-01), Lomas et al.
patent: 4614726 (1986-09-01), Walters et al.
patent: 4615992 (1986-10-01), Murphy
patent: 4923834 (1990-05-01), Lomas

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