Application Of MACSV Control System In The Pulp And Paper Industry

Firstly, the current industrial control applications, the most common DCS (distributed control system) are described in detail, and then the pulp and paper industry streaming link, for example, describes the characteristics of both the control and control distributed control system the way.Then, also in my company’s pulp and paper two areas, for example, described in detail by Hollysys my company used to develop a fifth generation DCS control system--MACSV system, including its system structure, control loop control methods and control algorithms. In the pulp and streaming control system, the use MACSV system control unit, on-site control cabinet of the production aspects of the sensor (such as level sensors, flow sensors, concentration, pressure transmitter) to realize the amount of the controlled process—pressure, level, concentration, flow rate, temperature and other real-time data acquisition, and transfer the data to the automatic control system were set analysis and processing, and in accordance with the requirements of process indicators for the processed data to form an executable instructions sent to Field of actuators (such as electric / pneumatic valves and motors), through their production process is adjusted so as to achieve product quality control.Finally, because there are many anomalies occur in today’s paper industry production process, such as the concentration of volatile pulp headbox level of instability, no flow meter to detect signals, etc., will seriously affect the normal papermaking process run, thereby affecting the quality of the paper. MACSV control system failure can occur in the system to find and put the results back to the user, to facilitate the user to judge and deal with failure, the system cannot determine for MACSV field failures, through the local expert system for fault diagnosis of a comprehensive analysis of. Because local expert knowledge base and database systems are not updated dynamically, especially when there is a fault after some difficult seem unable, at this time if the user does not solve the problem for a long time, it will cause great economic losses. In view of this situation, in-depth study of the characteristics of the papermaking process and fault diagnosis technology, the paper proposed and implemented a new type of remote fault diagnosis expert system based on the traditional method, and can solve the above problems. At the same time, the system also increase the use of wireless modules for different area of the factory workshop more remote control wireless remote control object, saving wiring also significantly improve the work efficiency.