Research On Automation Control System Of Heating Furnace

Currently, heavy plate productivity is seriously oversupplied in our country. Coupled with the small demand caused by the financial crisis, the steel industry has been in a deficit position. Heating furnace is one of important equipments in the rolling mill production line. Automation control system of heating furnace is the key to improve the quality and production efficiency of finished steel products, and also is an important guarantee for improving the competitiveness of plate products. In order to improve the production capacity of the furnace, enhance the furnace temperature control accuracy, and ensure product quality and performance, it is of great significance to conduct improvement and innovation on the existing control technology.This Thesis briefly introduces the application of regenerative reheating furnace automatic control system, and carries out a detailed analysis on it. And then the author elaborates on the furnace electronic control systems, instrumentation and control system equipment, technological parameter and control requirements. Specific process and the working principle of the furnace electronic control are also analyzed. A detailed analysis and study on the furnace control system is carried out for L1, L2and L3.Based on the heating furnace of Shou Qin4300production line, this Thesis gives a detailed introduction on automation and control systems of Shou Qin heating furnace, which includes first level automated system, second level automated system and third level automated system. The first level automated system is mainly in charge of signal chain and logical judgment in on-site machinery, hydraulic and air-powered equipments. The second level automated system is mainly in charge of generation of first level set value, optimization of process value system, transmission and recording of production data. The third level automated system is mainly in charge of transmission of PDI data, generation of production plan, and process assessment of production result. Finally, combined with engineering applications, aiming at the defects of PDI input system, the Thesis proposes related improving and optimizing solutions, in order to simplify operations, mitigate the labor intensity, reduce the data error rate, hence to improve work efficiency and accuracy.This Thesis summarizes the characteristics and actual outcomes of the furnace control system, and then proposes further improvement suggestions of the system, forecasting the system’s future application prospect in production.