Design And Application Study Of Electrical Control System For Regenerative Walking-beam Reheating Furnace

The walking beam heating furnace has large scale of productivity, high utilization of heating capacity and the uniformity of heating effect. It is one kind of the advanced heating furnaces. The electrical control system is the key to the high performance of the walking beam heating furnace. Taking the third hot rolling production line of Benxi iron and steel company as the research background, the article has researched and designed the electrical control system.The article has researched the related key equipment of walking beam regenerative reheating furnace, such as: loader machine, unloaded machine, walking system, series transfer roll. On this basis, the article has given the specific control strategies and algorithms. Therefore, in order to meet the high-yield, high-quality, low consumption, energy saving and pollution-free and high automation requirements,we design the system of electromechanical integration.In the other side, in order to achieve automation and material tracking and management, we divided the automatic control system into two parts. They are basic automation system (L1-level PLC control) and process computer control system (L2 level). The papers focused on basic automation level.In the basic automation level, the paper analyzes and designs the electric control in charging sides and discharge side, step mechanical control in the bottom and so on .Then the article discusses hydraulic systems which is the main power sources,slab yard, other individual equipments. Finally considering hydraulic speed control system in electrical control system of hot rolling production line, the article has given model and Simulation.In order to create greater benefits to customers and minimize economic losses, the article has considered the actual situation of field device and developed a corresponding control program. The article also draws on the ideological of redundant control and it can ensure the system operation during non-normal state.At the same time, for security considerations, the system is also designed to strict conservation measures to protect the safety of personnel and prevent damage to the equipment.After analyzing the results of the application and test data on the field, the article puts forward the further improvements and the methods in the end.At present,this system has been working for a year. The performance of automatic control system is stable, all the equipment are running well and met the requirements very well.