Method for controlling full-automatic optimization burning furnace of blast furnace coal injection system flue gas furnace

Abstract

The invention relates to a method for controlling a full-automatic optimization burning furnace of a blast furnace coal injection system flue gas furnace. The method comprises a step S1 of establishing a model: respectively establishing a dry air temperature control model, a flue gas furnace hearth pressure control model and a dry air oxygen content control model; a step S2 of performing parameter adjustment: adjusting medium temperature, pressure, flow, CO concentration and O2 concentration through the three models in the step S1, and respectively controlling dry air temperature, flue gas furnace hearth pressure and dry air oxygen content. The method has the advantages that the flue gas furnace runs under an optimum working condition through full-automatic burning furnace optimization and precise control over the flue gas furnace, index fluctuation in the flue gas furnace burning and control system is high, it is guaranteed that a system performs production stably, and a negative impact caused by manual operation is eliminated; in addition, the method not only can improve automatic control level, but also can greatly reduce operators' labor intensity and improve production efficiency.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy blast furnace ironmaking, in particular to a fully automatic optimized furnace control method for a flue gas furnace of a blast furnace coal injection system. Background technique [0002] Blast furnace coal injection is an important technology to replace coke with coal, change the energy structure, improve economic benefits and reduce environmental pollution in the blast furnace ironmaking process, and the combustion control of the flue gas furnace is an important part of the blast furnace coal injection technology. The flue gas furnace provides dry gas with qualified temperature, pressure and oxygen content for the pulverizing system of blast furnace coal injection technology. The powder is dried and transported to prepare coal powder that meets the requirements of the blast furnace coal injection process. [0003] At present, blast furnace coal injection mainly adopts the flu...

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Problems solved by technology

[0004] At present, the combustion control of the flue gas furnace in the domestic blast furnace coal injection pulverizing system is mainly manual and empirical operation, and the combustion process of the flue gas furnace has the characteristics of multi-variable, variable working conditions, and strong coupling, which is limited by the different operating habits of the operators. Due to factors such as differences in personal experience and individual experience, it is difficult for the operator to judge the working conditions in a timely and accurate manner, which may easily lead to large fluctuations in the indicators of the combustion control process of the flue gas furnace, the failure to achieve standardization of analysis results, and even production accidents due to operational errors

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