Online linearly-proportionally-controlled combustion system and control method thereof

Abstract

The invention discloses an online linearly-proportionally-controlled combustion system and a control method. A control device comprises a proportional burner as well as a gas pipe and a combustion-supporting air pipe which are connected with the proportional burner separately; a linear combustion-supporting air execution mechanism and an air quantity sensor are connected to the combustion-supporting air pipe; a linear gas execution mechanism and a gas quantity sensor are connected to the gas pipe; the linear gas execution mechanism is electrically connected with a thermocouple through a temperature controller; the thermocouple measures the temperature in a kiln; and the temperature controller controls (a gas quantity) at the valve location of the linear gas execution mechanism through the difference between the temperature value measured by the thermocouple and a set value. The control device further comprises a combustion-supporting air controller, wherein the combustion-supporting air controller is electrically connected with the linear combustion-supporting air execution mechanism and the air quantity sensor separately; and the gas quantity sensor is electrically connected with the combustion-supporting air controller through a proportional controller. The online linearly-proportionally-controlled combustion system and the control method are accurate in temperature control and air-fuel ratio control, and stable in running, solve the problem of fluctuation of atmosphere in the kiln, stabilize the product quality, and further avoid the problems of coking, carbon deposition, flameout and the like of the spray head of the burner.

Description

technical field [0001] The invention belongs to the technical field of industrial kiln combustion control equipment, and in particular relates to an online linear proportional control combustion system and a control method thereof. Background technique [0002] At present, the online linear proportional control combustion system is mainly used in industrial furnaces that need to control the content of the combustion atmosphere. The main problems of the traditional combustion system used for atmosphere control: 1. The traditional atmosphere controlled kiln does not have special linear combustion control equipment, and the atmosphere adjustment is greatly affected by human factors; 2. The traditional combustion system equipment is used in the atmosphere controlled kiln Problems such as burner coking, carbon deposition, and flameout are prone to occur on the surface, making it difficult to maintain a dynamic balance of atmosphere, temperature, and pressure in the kiln; 3. The q...

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Problems solved by technology

[0003] In order to solve the existing technical problems, the present invention provides an online linear proportional control combustion system with precise temperature and atmosphere control, stable thermal state inside the kiln, easy operation, convenient use, and a stable ratio of gas to air. The linear change of the temperature solves the problems of product quality defects caused by unstable atmosphere and the problems of easy coking, carbon deposition and flameout of the burner.

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