Intermittent chemical device and performance real-time evaluation method and device of control loops of intermittent chemical device

Abstract

The invention relates to an intermittent chemical device and a performance real-time evaluation method and device of control loops of the intermittent chemical device. The performance real-time evaluation method of the control loops of the intermittent chemical device comprises the steps that (1) the self-control state, a deviation value and a deviation set value of each control loop of the chemical device are obtained in real time; (2) a production cycle preset by an intermittent reaction is corrected, and the corrected production cycle serves as a calculation cycle; (3) the loop self-control rate of each control loop at the present time is calculated according to the self-control state and the calculation cycle of each control loop; (4) the loop stability rate of each control loop at the present time is calculated; (5) according to the loop self-control rate and the loop stability rate of each effective control loop in the control loops, device self-control rate statistical data and device stability rate statistical data of the chemical device are generated. The intermittent chemical device and the performance real-time evaluation method and device of the control loops of the intermittent chemical device overcome the defect that only a single control loop can be monitored and evaluated in the prior art.

Description

Technical field [0001] The invention relates to the field of chemical engineering, in particular to a method and device for real-time evaluation of intermittent chemical equipment and its control loop performance. 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 practices show that the improvement of basic control loops can increase plant capacity by 2%-5%, increase product output by 5%-10%, reduce energy consumption by 5%-15%, reduce defective products and unplanned shutdowns 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 loop and sho...

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

Images