Heating furnace hearth pressure dynamic optimization control method based on furnace gas amount

Abstract

The invention provides a heating furnace hearth pressure dynamic optimization control method based on the furnace gas amount and belongs to heating furnace control technologies. According to the furnace gas amount of a heating furnace, the opening degree of an inlet valve of an induced draft fan is adjusted to be matched with the furnace gas amount, so that the excess air coefficient of the heating furnace is controlled, on this basis, the speed of the induced draft fan is detected and adjusted according to the hearth pressure, and then the hearth pressure is stably kept within a set range; bythe adoption of the control strategy, a good hearth pressure control effect and an appropriate excess air coefficient are obtained; namely, the multiple effects of improving combustion efficiency ofthe heating furnace, reducing the total amount of smoke, improving the energy saving amount of the induced draft fan, reducing the emission of pollutants, lowering iron scale loss of casting blanks, achieving full automatic control over the heating furnace, lightening the labor intensity of an operator and improving the production operation efficiency are achieved, and the multiple benefits of saving energy, reducing emission, increasing yield and guaranteeing quality are achieved. The heating furnace hearth pressure dynamic optimization control method based on the furnace gas amount can be applied to newly-constructed or expanded or transformed various steel rolling heating furnace systems and refining-chemical heating furnaces and heating furnace systems under similar working conditionsin other industries.

Description

technical field [0001] The invention belongs to the control technology of a heating furnace, and in particular relates to the furnace pressure control of a steel rolling heating furnace. Background technique [0002] The heating furnace is one of the important equipments in the steel rolling mill, and it is also a major fuel and energy consumer in the rolling mill. Its energy consumption accounts for about 70% of the fuel energy consumption in the rolling mill. How to reduce the fuel consumption of the heating furnace in the rolling mill is of great significance for improving the thermal efficiency of the heating furnace and saving energy and reducing emissions. [0003] With the increasingly severe changes in the world's climate and environment, the country has increasingly strict requirements on energy consumption and environmental impact of enterprises. How to reduce energy and increase efficiency, and improve the competitiveness of energy conservation and emission reduct...

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Problems solved by technology

[0008] The dynamic optimal control method of furnace pressure in heating furnace based on furnace gas volume has not yet been published in public publications, literature or information

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