Control of a fractional distillation process

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

1983-06-28

1985-02-12

Sever, Frank

Refrigeration

Processes

Circulating external gas

62 37, 364501, B01D 342, F25J 302

Patent

active

044989164

ABSTRACT:
In a fractional distillation process in which both a heating fluid and a waste heat stream are utilized to supply heat to the fractional distillation process, the heat input to the fractional distillation process is controlled by scaling the output of the heat controller so that such output is representative of the percentage of the total heat available which should be supplied to the fractional distillation column to maintain a desired heat input to the fractional distillation column. The set point for the flow of both the heating fluid and the waste heat stream are then derived based on the output of the heat controller which allows control of heat input to the fractional distillation process and also provides a situation where the heat controller output may be linear which makes tuning the heat controller easier and improves stability of the heat controller.

REFERENCES:
patent: 3115445 (1963-12-01), Kleiss et al.
patent: 3268420 (1966-08-01), Webber et al.
patent: 3803002 (1974-04-01), Skraba et al.

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