Pressure responsive fractionation control

Distillation: processes – separatory – With measuring – testing or inspecting – Of temperature or pressure

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Details

23230A, 364501, 422112, F25J 302

Patent

active

041644514

ABSTRACT:
In a fractionation system in which pressure fluctuations within the fractionation vessel can result in alteration of the fractionator product composition, fractionation column pressure is monitored and converted to a temperature requirement signal representative of the temperature required within a preselected portion of the fractionation column in order to provide the desired product constituent distribution. The temperature requirement signal is utilized to provide a required heat signal which is representative of the direction and magnitude of any change necessary in the heat input to the fractionation column to maintain the required temperature. The heat input to the fractionation column is controlled in response to the required heat signal, corrected as necessary by actual analysis of the product.

REFERENCES:
patent: 2917437 (1959-12-01), Kleiss et al.
patent: 2939293 (1960-06-01), Green
patent: 3208230 (1965-09-01), Fourroux
patent: 3238111 (1966-03-01), Harper
patent: 3322650 (1967-05-01), Hillburn
patent: 3342702 (1967-09-01), Rijnsdorp
patent: 3803002 (1974-04-01), Skraba et al.
patent: 3830698 (1974-08-01), Kleiss
patent: 4070172 (1978-01-01), Smith et al.
Buss et al., "Modern Control Concepts for Gas Processing Plants," Presented at 54th Ann. GPA Convention, Mar. 10-12, 1975, Houston, Texas.

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