초록 ▼

Automatic control systems, and corresponding processes, for controlling either an anode adjuster in a chlor/alkali cell or at least one average middle temperature of a distillation column wherein the combination of feedback control from at least one real unit operation variable and an embedded real-

Automatic control systems, and corresponding processes, for controlling either an anode adjuster in a chlor/alkali cell or at least one average middle temperature of a distillation column wherein the combination of feedback control from at least one real unit operation variable and an embedded real-time dynamic simulation of that variable are used.

대표청구항 ▼

[ What is claimed is:] [1.] An automatic control system for an anode adjuster system for a chlor/alkali cell comprising:(a) a real anode adjuster system for a chlor/alkali cell wherein at least one process parameter is measured in real-time intervals and an output signal corresponding to each measur

[ What is claimed is:] [1.] An automatic control system for an anode adjuster system for a chlor/alkali cell comprising:(a) a real anode adjuster system for a chlor/alkali cell wherein at least one process parameter is measured in real-time intervals and an output signal corresponding to each measured process parameter is obtained;(b) a real-time dynamic simulator of the anode adjuster system of the chlor/alkali cell, wherein said same variable process parameter or parameters are estimated in real-time intervals and an output signal corresponding to each estimated process parameter or parameters are obtained;(c) a calculator for receiving the output signals from (a) and (b) and providing a calculated output signal that corresponds to the difference of those corresponding output signals from (a) and (b) for each process parameter;(d) a mirroring controller capable of receiving the calculated output signal from the calculator and converting that calculated output signal into a change signal that is sent to the real-time dynamic simulator, whereby the estimated process parameter or parameters are updated and an updated estimated output signal is obtained in the real-time dynamic simulator; and(e) a feed-back control unit that capable of receiving a feed-back signal from the real-time dynamic simulator and converting that feed-back signal into one or more control output signal to both the real anode adjuster system for a chlor/alkali cell and the real-time dynamic simulator, each control output signal capable of causing an adjustment in the measured variable process parameter of that real anode adjuster system for the chlor/alkali cell and estimated process parameter in the real-time dynamic simulator. [3.] An automatic control system for a distillation column comprising:(a) a real distillation column wherein an average middle temperature (AMT) of the distillation column is measured in real-time intervals and an output signal corresponding to the measured AMT is obtained;(b) a real-time dynamic simulator of the distillation column, wherein a corresponding AMT is estimated in real-time intervals and an output signal corresponding to the estimated AMT is obtained;(c) a calculator for receiving the measured AMT output signal and the estimated AMT output signal and calculating their difference and then providing a calculated AMT output signal that corresponds to that difference;(d) mirroring controller that is capable of receiving the calculated AMT output signal from the calculator and generating a change signal to the real-time dynamic simulator, whereby the estimated AMT is updated in the real-time dynamic simulator which then generates both an updated estimated AMT to the calculator and a feed-back output signal that corresponds to the updated estimated AMT of the distillation column; and(e) feed-back control unit that is capable of receiving the feed-back output signal from the real-time dynamic simulator and then generating control output signals to both the real distillation and the real-time dynamic column simulator, said control output signals capable of adjusting the AMT in the distillation column and in the real-time dynamic simulator.