Glass melting furnace and asymmetric characteristic dynamic control method for flue gas pipe network of glass melting furnace

Abstract

The invention discloses a glass melting furnace and an asymmetric characteristic dynamic control method for a flue gas pipe network of the glass melting furnace, belongs to a glass melting furnace control technology, and develops an external air inlet amount calculation mathematical model and an air excess coefficient calculation mathematical model to dynamically control the external air inlet amount and an air excess coefficient. The inlet amount of external air is calculated according to the argon content detected through flue gas analysis, and then the opening degree of an inlet valve of an induced draft fan is adjusted according to the difference between a set value and a calculated value, so that the inlet amount of the external air is always controlled within a set value range. The air flow and the fuel gas flow are adjusted according to the oxygen content and the carbon monoxide content of flue gas analyzing and detection to control the air excess coefficient, so that the air excess coefficient is always controlled within a set value range. According to the invention, multiple energy-saving and emission-reducing effects of improving the combustion efficiency, reducing the total amount of generated flue gas, improving the energy-saving amount of the induced draft fan, reducing the NOx pollution emission and realizing full-automatic control are achieved, and the method can be widely applied to newly-built, expanded and transformed glass melting furnace systems.

Description

technical field [0001] The invention belongs to the control technology of glass melting furnaces, specifically the external air intake control technology and excess air coefficient control technology of glass melting furnaces, and does not involve the liquid level system of glass melting furnaces; the invention does not involve control systems, control equipment and instruments selection. Background technique [0002] In the glass industry, energy consumption for glass melting accounts for 30% to 75% of the total energy consumption of the entire industry. According to different types of glass, energy costs account for 10% to 25% of the total cost. Therefore, improving the thermal efficiency of glass melting furnaces is of great importance. Reducing the cost of glass manufacturing has an extremely important impact; compared with the international advanced level, the thermal efficiency of glass melting furnaces in my country is low, generally only 20% to 25%, so the energy savi...

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Problems solved by technology

[0007] There are no published publications, documents or information on the dynamic control method of the glass melting furnace and its flue gas pipe network asymmetric characteristics involving the dynamic control of the air excess coefficient of the glass melting furnace and the external air intake

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