METHOD OF AUTOMATIC CONTROL OF SEPARATION PROCESS OF HEAVY OIL STOCK COKING VAPORS INTO FRACTION Russian patent published in 2000 - IPC

FIELD: automatic control of rectification process under nonstationary conditions; applicable in oil refining, chemical and other industries. SUBSTANCE: method is realized by variation of flow rate of extracted light gas oil and flow rate of live and circulating reflux depending on values of temperatures in column sections calculated by preset values of medium and final boiling points of extracted fractions, current values of partial pressure of these fractions in sections of column, current values of vapor flow rates in column section. In this case, during transition conditions associated with changing over of coke chambers, flow rate of extracted light gas oil in rectification column is changed depending on flow rate of extracted heavy gas oil with correction by changed procedure of level regulation in column accumulator. Calculated temperature on plate of extraction of light gas oil is maintained by varying flow rate of circulating reflux. EFFECT: higher accuracy of regulation of boiling points of extracted fraction, reduced degree of adjacent fractions overlaying, changed final boiling points of extracted fractions to increase extraction of light oil products. 1 dwg, 1 tbl