Underflow cyclone with perforated barrel

Details Underflow cyclone with perforated barrel Underflow cyclone with perforated barrel

1994-04-28

1996-05-07

Cross, E. Rollins

Distillation: processes, separatory

Particular type of heating

208153, 208161, 55452, 209720, 209721, 209722, 209723, 422147, C01G 1100, B04C 306

Patent

active

055142710

ABSTRACT:
A cyclone and process for fluidized catalytic cracking of heavy oils is disclosed. Gas and entrained solids are added tangentially around a vapor outlet tube in a cylindrical tube cyclone body. Solids and some gas is withdrawn via a plurality of openings radially and longitudinally distributed in the cylindrical sidewall of the cyclone body. Distributed withdrawal replaces or reduces conventional underflow of solids from an end of cyclone outlet and reduces solids reentrainment. 0-5 micron particle removal is enhanced by reducing eddy formation and particle bouncing near the cyclone sidewall. The device may be used as an FCC regenerator third stage separator.

REFERENCES:
patent: 2672215 (1954-03-01), Schmid
patent: 3970437 (1976-07-01), Van Diepenbroek et al.
patent: 4151044 (1979-04-01), Choi
patent: 4956091 (1990-09-01), Van Den Akker
patent: 5002671 (1991-03-01), de Villiers et al.
patent: 5055177 (1991-10-01), Haddad et al.
patent: 5190650 (1993-03-01), Tammera et al.
patent: 5372707 (1994-12-01), Buchanan et al.

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