Method for estimating inner surface temperature of blast furnaces

Abstract

The invention discloses a method for estimating the inner surface temperature of blast furnaces. The method includes measuring the furnace wall temperature and inlet and outlet temperatures of cooling water in the middle of the furnace wall through a thermocouple, analyzing furnace wall heat transfer mechanisms and establishing a two-dimensional steady mechanism model, deducing the two-dimensional temperature distribution on cross sections of different heights of the furnace inner surface by combining the mechanism model and the fuzzy reasoning method, fitting temperature curves piecewise along the axial direction of the blast furnace, combining the curves and estimating the distribution of the three-dimensional temperature distribution of the whole inner surface of the blast furnace. The method for estimating the inner surface temperature of blast furnaces has the advantages of good real-time performance, high temperature estimation accuracy, small deviation, strong adaptability and the like. Changes of the temperature in the furnace can be reflected timely for optimal control, stable production and secure operation of blast furnaces are guaranteed, the blast furnace smelting quality is improved, and good economic benefits and social benefits are provided.

Description

technical field [0001] The invention relates to energy and power engineering technology, in particular to a method for estimating the inner surface temperature of a blast furnace. Background technique [0002] The iron and steel industry is one of the most important basic industries in the national economy. It involves a wide range of industries, has a high degree of industrial correlation, and is strongly driven by consumption. It plays an important role in economic construction, social development, national defense construction, fiscal taxation, and stable employment. my country is a big country in steel production and consumption. In 2010, my country's pig iron output was 590.218 million tons, accounting for 57% of the global total. Blast furnace ironmaking production is a core process in the upstream of the steel production process and occupies an irreplaceable important position in the entire steel industry. At present, more than 90% of the pig iron smelting in the glo...

AI Technical Summary

Problems solved by technology

However, due to the high temperature, high pressure and corrosive substances inside the blast furnace, the temperature of the inner surface of the blast furnace cannot be directly measured, and can only be obtained indirectly.

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