Multiparameter automatic control method of industrial furnace burner

Abstract

The invention relates to a multiparameter automatic control method of an industrial furnace burner. A temperature parameter measured by a furnace tube or a hearth outlet temperature display control meter is utilized to control a fuel flow control valve of fuel supply volume; a fuel pressure gauge of the fuel supply volume judges whether the fuel pressure satisfies the combustion demand or not; a parameter of a fuel flow display control meter on a supplied fuel feed pipeline provides a control parameter for a combustion-supporting gas flow control regulator valve; combustion-supporting air amount is regulated proportionally; then an oxygen content parameter measured by an on-line analysis sensor of a fume detector of a furnace fume outlet serves as the control parameter of the combustion-supporting gas flow control regulator valve so as to regulate an upper limit value control parameter of the combustion-supporting air amount or the oxygen content; and a carbon monoxide or fuel composition content parameter measured by the on-line analysis sensor of the furnace outlet fume detector serves as the control parameter of the combustion-supporting gas flow control regulator valve so as toregulate a lower limit value control parameter of the combustion-supporting air amount or the oxygen content. The method can meet the accurate control demand of the fuel on the combustion-supportingair amount in the combustion process.

Description

(1) Technical field [0001] The invention relates to a method for controlling an industrial furnace burner. It is mainly used for the control of automatic burners in industrial heating furnaces. It can be used in industrial furnaces in petroleum, petrochemical, coal chemical, metallurgy, ceramics, building materials and other fields. It belongs to the technical field of automatic control of industrial furnace burners. (2) Background technology [0002] The industrial furnace burner is a key component to realize the combustion of fuel in the industrial furnace. The control that can be realized is to use the material outlet temperature parameter to control the fuel quantity parameter, plus flameout protection, to form a control scheme for automatically controlling the burner. Such control cannot realize the precise control requirement of the fuel for the amount of combustion-supporting air in the combustion process. In order to ensure full combustion, the combustion-supporti...

AI Technical Summary

Problems solved by technology

This kind of control cannot realize the precise control of the fuel to the amount of combustion-supporting air during the combustion process.

In order to ensure full combustion, the combustion-supporting air volume control damper is manually controlled. In industrial applications, the burner damper opening is often large. Regardless of the change in fuel volume, the damper opening can always meet the requirements of the combustion process for combustion-supporting air or oxygen. In this way, it is difficult to achieve the purpose of designing and controlling the excess air coefficient, and a large amount of heat will be taken away by the excessive combustion air, which reduces the combustion efficiency of the industrial furnace

[0003] In addition, fluid flow measurement requires a certain length of straight pipe section before and after the flowmeter in order to meet the measurement flow requirements. Due to the compact structure of the burner structure, it is difficult to meet the requirements for the straight pipe section.

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