Method and system for fractionation heat balance control

Details Method and system for fractionation heat balance control Method and system for fractionation heat balance control

1975-11-28

1977-05-24

Bernstein, Hiram H.

Distillation: processes, separatory

With measuring, testing or inspecting

Of temperature or pressure

203DIG18, 202160, B01D 342

Patent

active

040253961

ABSTRACT:
Heat balance of a fractionation column is controlled and maintained by obtaining three differential temperatures between selected temperature-sensing points along the height of the column. Signals representing the three delta-T's are employed in regulating the quantity of reflux to the rectification zone and the enthalpy (heat-input content) of the reboiled liquid bottoms stream. With respect to the latter, two delta-T's, obtained below the feed locus are used. One of these is considered in conjunction with the third delta-T, obtained above the feed tray, and an additional signal representing the flow rate of the feed stream, to regulate the quantity of reflux.

REFERENCES:
patent: 2580651 (1952-01-01), Boyd
patent: 2684326 (1954-07-01), Boyd
patent: 3272722 (1966-09-01), Walker
patent: 3408261 (1968-10-01), Johnson
patent: 3411308 (1968-11-01), Bellinger
patent: 3464895 (1969-09-01), Boyd

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