Bypass control system

Details Bypass control system Bypass control system

1981-10-13

1983-07-12

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 39091, 208153, 208DIG1, 252417, F02G 300, B65D 7500, B01J 3712

Patent

active

043923453

ABSTRACT:
In a fluid catalytic cracking process in the case of a catalyst load dump the catalyst-laden gas is prevented from passing through the power recover expander. This is achieved by establishing a tangential, low pressure bypass flow path in the supply line to the expander which causes the catalyst to be bypassed. An optical sensor senses the catalyst load dump and causes the actuation of the valve necessary to establish the low pressure bypass flow path.

REFERENCES:
patent: 3401124 (1968-09-01), Goulden
patent: 3743430 (1973-07-01), Riggs
patent: 3843268 (1974-10-01), Kaye
patent: 3867640 (1975-02-01), Paulsen
patent: 3873206 (1975-03-01), Wilcock
patent: 4071298 (1978-01-01), Falconer
patent: 4072006 (1978-02-01), Inubushi et al.
patent: 4137462 (1979-01-01), Wyler
patent: 4175865 (1979-11-01), Horvath et al.
Scheiman, A. D. "Key Factors must be Weighed in FCC Expander Bypass Selection." Oil and Gas Journal, Oct. 20, 1980, pp. 156 ff.

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