دانلود رایگان مقاله صنایع شیمیایی هوشمند مبتنی بر سیستم سایبری فیزیکی

Abstract

Responding to the technological progresses and the emerging trends of chemical industry, the mode of intelligent chemical industry based on cyber-physical system (CPS) was discussed. A structure of CPS for intelligent chemical industry was proposed, followed by the key techniques, including big data techniques and rigorous online modeling. As an example, the intelligent rectification column was elaborated. The structure of the three-agented column was proposed, to improve the optimal control level for the whole process system and promote on-line optimizing control techniques with robustness, in which CPS was the basic platform delivering the functions of surveying, communication, data storage, and computation. The optimal control models of distillation for the whole system were deduced as well; the assessment algorithms of equipment operating status, anomaly recognition, and multi-device collaboration based on the agent-oriented method were also illustrated. The operation results from the propylene rectification column showed that the intelligent rectification column proposed in the study was feasible, and met the operational requirements in terms of feedback time, stability, robustness etc.

4. Conclusions

This article analyzed a mode of intelligent chemical industry, proposed a framework of a cyber-physical system as the basic platform for the mode based on the characteristics of chemical industry and embodying the requirements of the industry development. The key techniques of CPS were also studied, including big data techniques and knowledge system based on rigorous online modeling. As a case, an intelligent rectification column was explored, which could meet the column’s operational requirements in terms of feedback time, stability, robustness, etc. Following were the main achievements: (1) Aiming for online optimization, the structure of intelligent rectification column based on CPS was established, characterized by three-agent structure, multi process integration, and online optimization, which contained almost all the basic elements of chemical unit operations except chemical reaction, and therefore had a certain general significance. But different chemical unit operation had different timeliness requirements, different requirements for stable control, and different requirements for reliability assurance. This was why the intellectualization of chemical industry was much more difficult than that of discrete industries. So the applicability and performance of the proposed structure need continuously improving.