| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to automatic control over rectification and can be used in chemical, pharmaceutical, petrochemical and food industries. Proposed method consists in adaptive control over temperature profile top point by varying reflux flow rate depending upon current losses of raw stock, compensation of disturbing effects caused by feed mix, forecasting of concentration by mathematical model of column top. Proposed device comprises rectification column, temperature gages, column top and bottom temperature controllers, fed mix temperature controllers, superheated steam flow rate controllers, reflux condenser, two heat exchangers arranged in line of distillation residue discharge and feed mix feed line, rectification column current efficiency identification unit, two chromatographs arranged at said discharge and feed lines. Outputs of said chromatographs are connected with target product concentration controller. Besides it includes reflux flow rate controller, target product consumption controller, column distillation product level controller, setting device for reflux flow rate controller and column top temperature controller, as well as disturbing effects compensator controller.EFFECT: higher efficiency.2 cl, 1 dwg |
