Control of a fractional distillation process

Details Control of a fractional distillation process Control of a fractional distillation process

1982-04-05

1983-03-22

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

With measuring, testing or inspecting

203 2, 203100, 203DIG8, 203DIG9, 202160, 202206, B01D 342

Patent

active

043774431

ABSTRACT:
In a fractional distillation process in which a heating fluid and waste heat stream are utilized to supply heat to a fractional distillation column and in which the heat supplied from the waste heat stream is not controllable, control of the liquid level in the fractional distillation column is accomplished by manipulating the flow rate of the heating fluid so as to maintain a desired liquid level until such time as the flow rate of the heating fluid becomes zero at which time the flow rate of the external reflux to the fractional distillation column is manipulated to maintain a desired liquid level in the fractional distillation column. A switching of control of the liquid level provides a means by which an uncontrollable heat input may be provided to the fractional distillation column without losing control of the liquid level in the fractional distillation column.

REFERENCES:
patent: 2976234 (1961-03-01), Webber
patent: 3309288 (1967-03-01), Butterbaugh
patent: 3322136 (1967-05-01), Matta
patent: 3340158 (1967-09-01), Bates
patent: 3434934 (1969-03-01), Washer
patent: 3555837 (1971-01-01), McClintock
patent: 3660247 (1972-05-01), Franks et al.
patent: 3668078 (1972-06-01), Holland
patent: 3803002 (1974-04-01), Skraba et al.
patent: 3905874 (1975-09-01), Griffin et al.
patent: 4019964 (1977-04-01), Fickel

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