Design And Implementation Of Automatic Paper-making Control System Based On DCS

With the improvement of people's living standards, the production and consumption of paper have been increased immediately. Paper-making industry is developing rapidly. Distributed control system has been widely used in pulp and paper-making industry. This is not only because of the centralized display and distributed control which are its traditional advantages, but nowadays DCS is more like a platform which can be used in data integration. Its open structure, compatibility, expansibility and some other informationalization and humanity functions can not only build a control system with high quality, but also can be a foundation for factory management and the enterprise information automation.This paper takes a large paper machine project as background. It has in-depth research on DCS based on MetsoDNA system. This article consists of five parts as follows:In the first part, it introduces the development status and trend of domestic paper-making industry and DCS, paper background and main work in this paper.In the second part, it researches of control features of paper-making industry and system control strategy of paper-making process.In the third part, it analyzes main structure of paper machine control system and has further statement every part of them.In the fourth part, it primarily researches of DCS hardware design of paper machine. MetsoDNA structure, network topological structure and connection, controller and I/O modules, MCC comparison and choice and DCS power supply design are told in detail.In the fifth part, it primarily researches of DCS software design of paper machine. System configuration, software application and programming are told in detail. It also researches the design and application of fieldbus technology, OPC technology and real-time database used in MetsoDNA system.MetsoDNA system used in this project operates stably. The expansibility, compatibility, open structure and integration of the system are good. Its good performance is widely accepted by customer.