The Reconstruction Of Descaler System For Saves Energy Conservation

The Baosteel 5000 Heavy Plate Mill project is largest project of Baosteel "15" planning and construction, Is Baosteel company to adjust the product structure and To meet the domestic market for large-caliber distance oil and gas pipelines, high strength ship plate, high strength construction plate, pressure vessel plate needs a major move.With the rapid development of modern power electronics and microelectronics technology, High voltage, high power, frequency control devices constantly mature, high-voltage motors using high-voltage inverter can achieve variable speed, so as to achieve the purpose of energy conservation.this sort of devices are widely used in petrochemical, municipal water supply, iron and steel metallurgy, electric power and energy industry, all kinds of fans, pumps.Normal production, in addition to the five scales system descaling point mode and open the closed frequent moves, Scales injection valve opens when the slab into the descaling box, roughing mill, finishing mill in addition to shut down when the slab away from the equipment after the descaling injection valve. In addition to the number of opening and closing of the scales point with rolling rhythm and process requirements different. No or only a descaling point in time more than 80%, Less water consumption, the two descaling pump are enough to meet the production process requirements. At this point all descaling pump motor keeps working frequency operation, continued unreasonable descaling system control means to cause a great waste of energy.The project intends to appropriate transformation of the original descaling system, Reached by the operator to select# 4 or# 5 descaling pump frequency control (# 4 or # 5 pumps can not run at the same time in the frequency state), with the establishment of the PLC system,from the mill system PLC obtain steel plate basic data, calculate the the descaling system pressure demand through energy-saving control model, to chang the state of three descaling pump motor keeps working frequency operation, continued unreasonable descaling system control means to cause a great waste of energy,given the optimal frequency setting to reduce the mill in addition to the purpose of scales pump energy consumption.The power consumption of the equipment after the project, save about 25% satisfactory results.