| Hot Strip Rolling Mill Plant 2150 mm production line is the production of general carbon steel, low carbon steel, quality carbon structural steel, ship structure steel, pipeline steel, boiler with steel, pressure vessel steel, special steel plate of modern rolling mill roll, the annual output is 500 million tons. The production task of the heating furnace is to heat the continuous casting slab to the temperature that can meet the requirements of the rolling mill, so that the temperature inside and outside of the slab is uniform, so the combustion fan control system of the heating furnace plays an important role in the production. Stepping type heating furnace combustion fan control system should do in response to the process is shorter, the temperature control precision higher, to improve the heating quality for the purpose. Due to the world steel enterprises are facing an unprecedented crisis of survival, China is a world steel and its output is the largest in the country, but at the same time, the resources, energy consumption is relatively scarce country, in recent years, with the prosperity of the world economy, energy crisis become a big problem of restricting the economic development, the promotion and application of energy saving technology is the key to the sustainable development of China's iron and steel industry, the vigorous implementation of energy-saving technology is the focus of the work of the national planning, heating furnace also has Also has a lot of energy saving space..The slab in reheating furnace heating is the first step of continuous production, automatic combustion control of reheating furnace for saving fuel, reducing energy consumption, reduce the oxidation burning loss and meet the rhythm of the rolling line. In this paper, based on power transmission technology, automatic control technology, frequency conversion technology, as well as the rolling process automation technology and so on, Study on the transformation and upgrading of AISC Hot Strip Rolling Mill of 2150 mm hot rolling mill production line heating furnace combustion fan of the whole system, to analyze the transformation of equipment, to demonstrate the program of research and design, installation and test of equipment, the final verification of the actual effect of the system. Firstly, this paper reviewed the production process of 2150 mm hot strip mill production line heating furnace, the furnace, walking beam, out of control design, and study combustion fan control system, aiming at the shortage of system redesign. According to the field of technology, research and design of heating furnace combustion fan control principle and control logic, single loop with negative feedback control system. The heating furnace combustion fan control system reforming, the comparative study of the transformation of the equipment, selection of reason and characteristics of the various parts of the equipment, and make a careful study of the problem in the construction process, solutions are given. Fourth, the research and design of the control interface. Fifth, the whole control system is tested and debugged, and the stability of the system is tested through the load test, and finally the energy saving effect is demonstrated.At present, the combustion fan control system has been officially put into operation, the system's static and dynamic technical indicators can meet the heating requirements of the production process, running in good condition, the motor adopts permanent magnet speed technology, improve the efficiency of the system, solve the saddle combustion fan motor of Hot Strip Mill of 2150 mm with high energy consumption situation and this transformation, each part of the system realizes the function and the corresponding energy saving effect, to provide effective experience after the renovation of similar equipment. |
PDF Full Text Request