Automatic control device for rotation of blast furnace chute

Abstract

Relating to the technical field of chute automation control of a blast furnace distributing device, the invention especially relates to an automatic control device for rotation of a blast furnace chute. The device is characterized by comprising an input unit, a frequency conversion driving unit, an execution unit and a PLC (programmable logic controller) control unit. The input unit is connected to the frequency conversion driving unit and the execution unit in order, and the PLC control unit is in connection with the frequency conversion driving unit. The input unit consists of a rapid fuse, a contactor and a reactor 1 which are connected to a three-phase power supply in order. Compared with the prior art, the invention, by combining a PID (proportion integration differentiation) closed loop vector control technology and a PLC programming control technology, converts a speed instruction to an analog signal of 4-20mA so as to control the rotation speed of the chute, thus the system can have great torque and rapidity, and also can reach an ideal degree of accuracy. Therefore, the utilization coefficient of the blast furnace is raised, and the discharge of exhaust gases and flue dust can be reduced.

Description

technical field [0001] The invention relates to the technical field of chute automatic control of a blast furnace distributor, in particular to an automatic control device for blast furnace chute rotation. Background technique [0002] In view of the current global energy shortage and the reality that environmental pollution is becoming more and more serious, the country attaches great importance to energy conservation and environmental protection. Iron and steel enterprises are large energy consumers, consuming 40% of the world's energy every year, and blast furnace ironmaking is energy-consuming in iron and steel enterprises. Importantly, the performance of the material distribution system in blast furnace ironmaking is directly related to whether the energy is fully utilized, the blast furnace utilization factor and the exhaust gas and dust emission indicators. In the electromechanical integrated equipment for blast furnace material distribution, it is often required to c...

AI Technical Summary

Problems solved by technology

Since the bellless furnace top charging equipment introduced by Luxembourg Paul Wurth Company in the early 1970s replaced the traditional bell furnace top, the rotation of the chute has been driven by a wound rotor asynchronous motor (or DC machine). The control mode is not only a waste of energy, but also far from meeting the requirements of modern industry

Motor frequency conversion control has the advantage of flexible control, but due to the imperfect corresponding protection system and unsatisfactory control accuracy, it brings great safety hazards to mechanical equipment and personal safety, and cannot meet the control requirements of normal production

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