Serial automatic coal injection control system and method for blast furnace

Abstract

The invention relates to a system and a method for controlling the automatic coal injection of a blast furnace serial pot, which belongs to the technical field of the automatic coal injection of a blast furnace serial pot. The system comprises a hardware monitoring system and a software processing module. The system is characterized in that a Siemens PLC control system and an upper monitoring system is connected by a Profibus network to monitor the state of each coal injection process; the real-time data communication of model calculation and automatic regulation with coal injection is realized by an Ethernet; the software processing module mainly comprises a data acquisition module, a sampled data renewing module, a mathematical model coefficient correction module, a mathematical model calculation module, a fuzzy regulation module and a fast-regulation module; and all parts of the software processing module run on an industrial computer. The system and the method overcome the difficulty that a weighting result of a coal injection system of a serial pot is affected by numerous factors, use many mathematical methods to handle a weighting result of a coal injection pot, are combined with a mathematical model and fuzzy control and realize the automatic coal injection control of a blast furnace serial pot.

Description

technical field [0001] The invention belongs to the field of automatic coal injection control of blast furnace stringing tanks, in particular to a blast furnace stringing tank automatic coal injection control system and method, a special control system and method based on model self-learning and fuzzy control combined automatic coal spraying of stringing tanks. Background technique [0002] The blast furnace coal injection system is an important part of the blast furnace smelting system. It undertakes the important tasks of reducing the coke ratio of the blast furnace, improving the energy consumption structure, reducing fuel consumption and pig iron cost. Since the blast furnace coal injection system adopts the method of cascading tanks, the complexity of the process of the system and the limitations of the process equipment, the automatic coal injection control of the cascading tanks has not been solved. [0003] The control process of the string tank coal injection system...

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Problems solved by technology

[0013] The purpose of the present invention is to provide an automatic coal injection control system and method for stringing tanks of a blast furnace, which can overcome the problems caused by the hardening of the soft connection of the stringing tank system during the charging and releasing of coal powder in each tank, and the pouring of coal powder in the upper, middle and lower tanks. In the tank process, the electronic scale display of each tank is inaccurate, and the actual injection volume of pulverized coal in the injection process cannot be accurately measured. Technical deficiencies, such as fully considering the various processes of coal injection production, can truly realize the blast furnace string Tank automatic coal injection control to ensure the uniformity and accuracy of coal injection

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