Dynamic optimization control method for temperature of heating furnace based on combustion-supporting air flow calculation

Abstract

The invention discloses a dynamic optimization control method for temperature of a heating furnace based on combustion-supporting air flow calculation and belongs to a heating furnace control technology. The opening degree and the air flow of an air regulating valve are accurately controlled according to a set air-fuel ratio and the combustion-supporting air flow calculation of the heating furnace, so that the air flow is matched with the gas flow to obtain an optimal combustion effect; and according to O2 and CO components in detected smoke gas, a combustion-supporting fan speed adjusting method is adopted to dynamically control the excessive air coefficient, and the excessive air coefficient of the heating furnace is effectively controlled. The good combustion effect and the effective excessive air coefficient control achieve the multiple effects of improving the combustion efficiency of the heating furnace, reducing the total amount of generated smoke gas, improving the energy saving amount of a fan, reducing the pollution discharge amount, reducing the oxidation burning loss of a casting blank, realizing the full-automatic control of the heating furnace, reducing the labor intensity of an operator and improving the production operation rate, and the method can be used for new, expanded or renovated steel rolling furnaces and refining-chemical heating furnaces and heating furnace systems in other industries.

Description

Technical field [0001] The invention belongs to heating furnace control technology, and specifically relates to temperature control of a basic automatic grade steel rolling heating furnace. Background technique [0002] The heating furnace is one of the important equipment of the rolling mill, and it is also a major fuel and energy consumer of the rolling mill, and its energy consumption accounts for about 70% of the fuel energy consumption of the rolling mill. How the rolling mill reduces the fuel consumption of the heating furnace is of great significance for improving the thermal efficiency of the heating furnace and energy saving and emission reduction. [0003] With the increasingly severe changes in the world's climate and environment, the country's requirements for corporate energy consumption and environmental impact are becoming stricter. How to reduce energy consumption and increase efficiency and improve the competitiveness of energy conservation and emission reduction i...

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Problems solved by technology

[0008] The dynamic optimal control method of heating furnace temperature based on the calculation of combustion-supporting air flow has not seen any published publications, documents or materials

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