Based On The Performance Evaluation Of The Coke Production Process Optimization Run Closed-loop Control System Design

As the final product of coking process, coke is the main raw material in many crucial industries for national economy. However, the popular optimization and control strategies focus on open-loop control and local optimization for certain production stage in the whole coking process. Therefore, it has adverse influence on enhancing profits, realizing energy-saving and material-reducing. Then, it is difficult to acquire optimal economic benefit. In this paper, a design technology of optimal operation closed-loop control system for coking production based on performance assessment is studied to solve these problems.Based on the analysis of the coking process characteristics and control problems, a closed-loop control system architecture for coking production, which is composed by coordinative optimization and correction layer, local optimal control layer, process control layer and performance assessment system is presented. Linear logic, set theory, production rule and tuple concept is used in the formal description of each part of the proposed architecture. According to the formal description, a multi-objective optimization model is built in coordinative optimization and correction layer. In this optimization model, quantity of coke and energy consumption are set as optimization objectives, flue temperature, coking time and the water content of coal blend as decision variables, quality of coke as constraint condition. Moreover, an improved multi-objective difference envolution algorithm is proposed to resolve this optimization model. Finally, expert correction strategy based on performance assessment is presented to dynamicaly modify coordinative optimization.The actual operation data is used to confirm the efficiency of those proposed strategies on the simulation experiment plantform for coking production process. Experiment result shows that the proposed strategies of coordinative optimization and expert correction can realize the optimal operation of coking production process and realize the enterprise production targets of high quantity, good quality and low consumption under stabilization production.