Continuous type chemical equipment and method and device for evaluating performance of control loops thereof in real time

Abstract

The invention relates to continuous type chemical equipment and a method and device for evaluating performance of control loops thereof in real time. The method comprises the steps that (1) obtaining self-control states, deviation values and deviation setting values of each control loop of the chemical equipment in real time, (2) calculating the loop self-control rate of each control loop at the current moment according to the self-control states and a calculation period of each control loop, (3) calculating the loop stability rate of each control loop at the current moment according to the deviation values, the deviation setting values and the calculation period of each control loop, and (4) generating equipment self-control rate statistical data and equipment stability rate statistical data of the chemical equipment according to the loop self-control rate and the loop stability rate of each effective control loop in the control loops. The continuous type chemical equipment and the method and device for evaluating the performance of the control loops thereof in real time overcome the defect that monitoring and evaluation can only be carried out on one certain control loop in the prior art.

Description

Technical field [0001] The invention relates to the field of chemical engineering, in particular to a continuous chemical plant and a method and device for real-time evaluation of the performance of its control loop. Background technique [0002] Statistical analysis shows that currently 30% of the loops in my country's chemical production equipment are not working in the best condition due to unreasonable parameter setting or controller problems, and 60% of the control loops require continuous online monitoring and performance evaluation. International best practice shows that the improvement of the basic control loop can increase plant capacity by 2%-5%, increase product output by 5%-10%, reduce energy consumption by 5%-15%, reduce defective product rate and unplanned shutdown by 25% -50%. [0003] At present, the monitoring of loop working status of most chemical plants in my country is limited to DCS. Limited by the function of DCS, this monitoring can only target a single loo...

AI Technical Summary

Problems solved by technology

[0003] At present, the monitoring of the circuit working status of most chemical plants in my country is limited to DCS. Due to the limitation of DCS functions, this monitoring can only focus on a single circuit and short-term changes, and cannot complete systematic calculations and generate overall guidance for chemical production. Significance of relevant diagnostic reports

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