Fractionator feed tank pressure control

Details Fractionator feed tank pressure control Fractionator feed tank pressure control

1980-05-16

1981-11-03

Sever, Frank

Refrigeration

Processes

Circulating external gas

203 2, 203DIG18, 208DIG1, B01D 342

Patent

active

042983630

ABSTRACT:
In a fractionation process in which at least two fractional distillation columns are cascaded in series, the vapor from the overhead accumulator associated with the first fractional distillation column in the series is provided to a feed tank for the second fractional distillation column in the series. The flow of the vapor from the overhead accumulator associated with the first fractional distillation column in the series is controlled by means of a control valve. An interactive control system is utilized to maintain the pressure in the overhead accumulator associated with the first fractional distillation column within safe operating limits, maintain the control valve at a substantially fully open position so as to minimize the pressure drop across the control valve controlling the flow of vapor from the overhead accumulator associated with the first fractional distillation column, and maintain the pressure in the feed tank to the second fractional distillation column at a desired value.

REFERENCES:
patent: 3049886 (1962-08-01), Cabbage
patent: 3172880 (1965-03-01), Lupfer
patent: 3309882 (1967-03-01), Cabanaw
patent: 3322136 (1967-05-01), Matta
patent: 3600282 (1971-08-01), Lupfer et al.
patent: 3619377 (1971-11-01), Palmer et al.
patent: 3676304 (1972-07-01), Hobbs et al.
patent: 4111637 (1978-09-01), Hillman

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