Rapid design method of dilute acetone distillation industry dynamic optimization control layer output constraint

Abstract

The present invention discloses a rapid design method of dilute acetone distillation industry dynamic optimization control layer output constraint. The method comprises a step 1 of solving a gain model of a steady state optimization layer of a model prediction controller aiming at a dilute acetone distillation industry model prediction control system of a double-layer structure; a step 2 of finding out the uncertain elements in a process gain matrix in the gain model; a step 3 of solving the upper boundary and the lower boundary of an output constraint reachable set according to the uncertain elements and the system interference variables; a step 4 of obtaining the dynamic optimization control layer output constraint according to the upper boundary and the lower boundary of the output constraint reachable set. The rapid design method of the dilute acetone distillation industry dynamic optimization control layer output constraint provided by the present invention can effectively solve the problem that the time needed to calculate the upper boundary and the lower boundary of the output constraint reachable set is longer, and the solution speed is influenced by the system dimensions barely.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a rapid design method for dynamically optimizing the output constraints of a control layer in the rectification industry of propylene glycol. Background technique [0002] Acetone is one of the important basic organic raw materials, mainly used in the manufacture of cellulose acetate films, plastics and paint solvents. In different applications, acetone is required to have different purity, sometimes it is required to be of high purity, even anhydrous acetone, but this is very difficult, because acetone is extremely volatile and soluble, so, I want to It is often very difficult to obtain high-purity acetone. [0003] In order to raise the low-purity acetone aqueous solution to high-purity, continuous distillation is generally used. The rectification operation in the chemical plant is carried out in a vertical circular rectification column, which is equipped with several layers...

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Problems solved by technology

[0006] The invention provides a rapid design method for the output constraints of the dynamic optimization control layer of the rectification industry of propylene glycol, which can effectively solve the problem that the calculation of the upper boundary of the output constraint reachable set and the lower boundary of the output constraint reachable set take a long time, and obtain Fetching speed is hardly affected by the dimensionality of the system

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