Combustion control system and method of industrial furnace

Abstract

The invention provides a combustion control system and method of an industrial furnace. The combustion control system of the industrial furnace comprises a laser spectrum detection device, a combustion control device, an oxidation burning loss detection device, a comparison device and a computing device, wherein the laser spectrum detection device is used for detecting the content of gas in the industrial furnace, the laser spectrum detection device comprises a laser, a detector and an analysis module, the combustion control device is used for optimizing and adjusting the combustion conditions in the industrial furnace according to data transmitted by the laser spectrum detection device, the oxidation burning loss detection device is used for detecting oxidation burning loss of workpieces which pass through the industrial furnace, and transmitting the detection result to the comparison device, the comparison device is used for obtaining the comparison result according to the received detection result and the original oxidation burning loss conditions, and transmitting the comparison result to the computing device, and the computing device is used for obtaining the combustion control result of the industrial furnace according to the received comparison result. The combustion control system and method of the industrial furnace have the advantages that detection accuracy is high, the detection speed is high, the cost is low, and energy is saved.

Description

technical field [0001] The invention relates to a heating furnace, in particular to a combustion control system and a control method of an industrial heating furnace. Background technique [0002] The heating furnace is a major energy consumer in the rolling mill, and at the same time occupies a very important position in the rolling production. It is mainly used to improve the plasticity of the steel, reduce the deformation resistance, and heat the steel to the temperature level required by the process according to the rolling rhythm of the rolling mill. Heating quality. On the premise of ensuring high-quality production, it is necessary to reduce fuel consumption as much as possible and reduce oxidative burning loss. [0003] When the air consumption coefficient in the heating furnace is in the optimal combustion area, the thermal efficiency of the fuel system is the highest. If the air consumption coefficient is lower than the lower limit (minimum value), the fuel is no...

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Problems solved by technology

[0006] 1. Due to the large volume of the heating furnace, the temperature response lags greatly and the temperature adjustment is slow;

[0007] 2. The air-fuel ratio set manually is often inconsistent with the actual air-fuel ratio in the furnace, and the error is large

[0008] 3. It is impossible to obtain the oxygen and carbon monoxide concentration in each section of the heating furnace in real time and continuously, and it is impossible to determine the actual air consumption coefficient in each section of the heating furnace, that is, it is impossible to determine whether each section of the heating furnace is in the best combustion state;

[0009] 4. Since the combustion situation in the heating furnace cannot be accurately known, the actual air consumption coefficient is often relatively large, most of which reach 1.4 or above, which increases fuel consumption, and at the same time the oxidation burning rate is high, generally ≥ 1.0%. High even exceeds 1.5%;

[0010] 5. Generally, the temperature control range is large (target temperature T±50°C), and the energy consumption is high;

[0011] 6. It is impossible to know the residual fuel content in the furnace, which often causes potential safety hazards, resulting in explosion accidents of subsequent process pipelines, exhaust fans and other equipment, resulting in equipment property losses and personnel safety accidents

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