Design And Studying Of Circle Anode Baking Furnace Control System

Carbon anode baking is one of important working procedures in aluminium industry. With the development of aluminium industry, more carbon anodes and higher quality are both required. The quality of carbon anodes will have direct impact on current efficiency and energy consumption to aluminium electrolysis production. So, how to improve carbon anode quality, how to improve anode baking technology become important tasks for developing independent intellectual property in aluminium electrolysis industry. Since the aluminium electrolysis industry involves many other fields including petrochemical industry, tar oil chemical industry, carbon technics, heat furnace and aluminium electrolysis which are frontier branches of science. So the study in many aspects include anode baking process and control still has a long way to walk.This paper is based on the project of 36 circle anode baking furnace in Lanzhou Aluminium Ltd. This is the expanded project, and I am fortunate that I participated and did study on auto control system. The project was completed by both Setaram of France and Lanzhou University of Technology. After finished, they have higher equipment level, shorter period of operation and control, higher production quality, lower energy consumption, higher output, and strengthen enterprise competition.In this paper, firstly anode baking furnace Significance and its development of home and abroad are introduced. Secondly, it expatiates the gap between internal and international'level in producing anode technology. Then it introduces the influenced facts during baking process, in other words, we should try to improve the anode block quality. The direct effect of improving anode block quality is to cut down the anode consumption during electrolyzing process. Then it introduced baking principles and craftwork requirement. The entire baking process includes the cohere decomposition, volatility exhaust and coking. It also introduced some control methods mainly to control temperature and pressure effectively. Because PID regulation method is mainly used in real production and well done, I do the study of PID regulation. Finally, I do detailed study on configuration of level 1 and level 2 equipments, the hardware and software and running status of the whole fire system, and how the communication and controlling are carrying out according to the real production and project.The main work as follows:1. Because PID control method is very mature and used widely in real project. It was also used in expanded project and indicated that its control effect was good. But because of the natural condition and many indefinite factors, the air pressure difference and temperature difference is big, which will influence the quality of carbon anode. So I bring forward one fuzzy PID regulation method and study it in theory.2. Recently, the Chalco Qinghai company is preparing for expanded project for cathode plant. They invited us to join the public bidding. I did detailed study on level1 and level 2 in this paper which will be used to bidding as elementary scheme. The project of anode baking furnace of Baiyin Aluminium Company which was completed by Numerical Control Center and Telecom College of Lanzhou University of Technology was recognized and praised by Part A. The control system and software were designed by us independently. I used it for reference, and did further study on Lanzhou Aluminium Company expanded anode baking project.