An online monitoring method for continuous stirring based on multiple modules and stages

Abstract

The invention discloses an on-line monitoring method for continuous stirring based on multiple modules and stages, comprising: step 1. According to the sampling period, the concentration C of the reactant is measured by a sensor 0 , catalyst concentration C′, product concentration C S , reaction temperature T, reaction time t; step 2, normalize the parameters obtained in step 1 in turn, and determine the input layer vector x={x of the three-layer BP neural network 1 ,x 2 ,x 3 ,x 4 ,x 5}; where x 1 is the reactant concentration coefficient, x 2 is the catalyst concentration coefficient, x 3 is the product concentration coefficient, x 4 is the reaction temperature coefficient, x 5 is the reaction time coefficient; step 3, the input layer vector is mapped to the middle layer, the middle layer vector y={y 1 ,y 2 ,…,y m}; m is the number of nodes in the middle layer; step 4, get the output layer vector o={o 1 ,o 2 ,o 3};o 1 is the adjustment coefficient of the catalyst valve opening, o 2 is the stirring rate adjustment factor, o 3 is the opening degree of the coolant valve; step 5, control the opening degree of the catalyst valve, the stirring rate and the opening degree of the coolant valve.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to an on-line monitoring method for continuous stirring based on multi-module stages. Background technique [0002] The agitator is a device for forced convection and uniform mixing of liquid and gas media. It is widely used in chemical production and realizes large-scale industrial production. The continuous stirring reactor is a kind of agitator. [0003] The reactor of continuous stirring reactor is widely used in chemical production, fine chemical industry, biomedicine, food production and other industrial fields. For continuous stirring reactors, in the stable production process, the key factors affecting the product quality of reactants are the catalyst concentration and the internal temperature of the reactor. Due to the different production process requirements of different products, optimal control of the catalyst concentration, reactant concentration and temperature in ...

AI Technical Summary

Problems solved by technology

[0004] At present, optimal control theory and corresponding methods are rarely used in the control system of domestic continuous stirring reactors, and the parameters in the controller are often set by experience.

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