Mineral oils: apparatus – Vaporizing – Automatic control
Patent
1974-08-19
1976-06-22
Wolk, Morris O.
Mineral oils: apparatus
Vaporizing
Automatic control
202160, 202206, 203 2, 23515112, 23253A, B01D 342, C10G 702, G05B 2102
Patent
active
039649750
ABSTRACT:
The temperature of light straight run gasoline from a depropanizer tower is controlled as the function of the Reid Vapor Pressure change of a crude oil feeding a flash tower which provides an overhead product to the depropanizer tower and flashed crude oil to an atmospheric tower. The Reid Vapor Pressure is determined from the overhead product, the flashed crude, the pressure of the vapor in the flash tower and the temperature of liquid in the flash tower. A control unit includes a network which determines a change in the Reid Vapor Pressure as the quality of the feed crude oil to the flash tower changes. The network determines the change in the Reid Vapor Pressure and when the change exceeds a limit, provides a feed forward signal corresponding to a desired temperature associated with the new Reid Vapor Pressure. The desired temperature signal is determined in accordance with the equations hereinafter disclosed. The desired temperature signal is supplied to a time select circuit which will not implement the desired temperature signal until after the elapse of a predetermined time interval to account for the delay time for the change of feed crude oil to effect the quality of the feed to the depropanizer tower so that the temperature control may be implemented at the proper time.
REFERENCES:
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patent: 2456398 (1948-12-01), Gerhold
patent: 2868701 (1959-01-01), Berger
patent: 2974182 (1961-03-01), Van Pool
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patent: 3434934 (1969-03-01), Washer
patent: 3686488 (1972-08-01), Woodle
patent: 3881994 (1975-05-01), Fickel
patent: 3901062 (1975-08-01), Lynch et al.
Harrison Charles W.
Senters Glenn A.
Garris Bradley R.
Gillespie Ronald G.
Ries Carl G.
Texaco Inc.
Whaley Thomas H.
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