Automatic control system and method for temperature of combustion section of vertical type annealing furnace

Abstract

The invention discloses an automatic control system for a temperature of a combustion section of a vertical type annealing furnace, and belongs to the technical field of metallurgical control of the annealing furnaces. The automatic control system comprises a computer terminal, a programmable controller, a combustion control unit, a regulating valve, a zirconium oxide analyzer and a heat value analyzer. The invention further discloses an automatic control method for the temperature of the combustion section of the vertical type annealing furnace. In a combustion process of the annealing furnace, the combustion section adopts a theoretical air-fuel ratio as the basis, and the zirconium oxide analyzer and the heat value analyzer are combined to obtain a practical use air-fuel ratio, so that optimal control on the strip steel temperature in the annealing furnace is realized. The automatic control system and the automatic control method have the advantages of improving the control precision of the temperature of the combustion section of the annealing furnace, guaranteeing smooth production, saving production fuels and reducing environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of metallurgical control of an annealing furnace, in particular to an automatic temperature control system and a method for a combustion section of a vertical annealing furnace. Background technique [0002] The annealing furnace is an important part of the aluminum and zinc production line, and its control system undertakes the important task of providing suitable temperature and quality for the annealing process and the aluminum and zinc process. In order to meet the requirements of the market, the quality requirements of high-strength aluminum-coated and galvanized steel strips and coatings are also getting higher and higher. Due to the complexity and hysteresis of the combustion process of the annealing furnace and the limitations of the process equipment, at present, the combustion method of the annealing furnace is controlled by using a regulating valve to control the flow rate ratio of natural gas and...

AI Technical Summary

Problems solved by technology

The natural gas and air ratio combustion control effect in the prior art is poor, and the temperature control accuracy is not high. For the control system with a large lag such as the annealing furnace combustion, the most commonly used method is to use a PID regulator to realize it. The air-fuel ratio is The main parameters of the combustion system, the setting of the air-fuel ratio is realized manually to control the temperature of the annealing furnace. In this case, the temperature control accuracy is still not ideal, and the environmental pollution problem caused by incomplete combustion is also relatively serious.

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