METODE PENGENDALIAN PROSES PEMISAHAN SECARA TEPAT UNSUR-UNSUR CAMPURAN, DALAM SISTIM PEMISAHAN RENDAMAN BERGERAK TERSIMULASI

摘要

- method for accurately controlling a process for separating continuous line of the constituents of a mixture, in a system of the simulated moving bed on the basis of measurements of concentration and flow - the system includes a set of columns forming a closed loop comprising a plurality of zones between the injection and draw-off points of the fluids. The control of the process of the type of multivariable (nonlinear) is carried out using a model of consciousness, and a certain number of measurements of operating variables in a plurality of measurement points along the loop (concentrations and the flow rates, for example) and measurement characteristics of the injected fluids and withdrawn. It is determined on the basis of current values of the controlled variables depending on the operating variables measured (purity of the constituents, the efficiency of the system, etc.), indicating respectively the ratios of the ratio in each of the different zones, between the flows of fluids and the flow rates simulated of adsorbent material. On the basis of these ratios, it determines the values to give the operating variables in order to bring or to return the controlled variables to the set point values determined. - application to the stabilization of the process of separation of aromatic hydrocarbons, in the presence of significant variations in flow rate or the quality of the load.