Refined control method of industrial combustion furnace

Abstract

The invention discloses a precise control method for an industrial combustion furnace and belongs to the technical field of combustion of industrial combustion furnaces. The precise control method comprises the following steps: firstly, preparing a tubular combustion chamber of which the front end is opened and a plurality of nozzles used for blowing a fuel into the combustion chamber, wherein the spraying direction of each nozzle is consistent with the tangential direction of the internal circumference of the combustion chamber; then arranging a three-dimensional temperature field monitoring point, an oxygen concentration monitoring point and a fuel gas concentration monitoring point in the directions, right opposite to each nozzle, in the combustion chamber; and finally, controlling flow controllers on combustion-supporting gas sleeves, fuel gas sleeves and combustion-supporting gas manifolds through data conveyed by the three-dimensional temperature field monitoring points, the oxygen concentration points and the fuel gas concentration monitoring points. As the combustion-supporting gas manifolds are additionally arranged in the fuel gas sleeves, the contact area of a combustion-supporting gas and a fuel gas is increased to a great extent, and the mixing degree and the combustion speed are improved; and as the flow controllers are mounted on the combustion-supporting gas manifolds, the gas flow can be controlled according to the data provided by the monitoring points.

Description

technical field [0001] The invention relates to the technical field of combustion of industrial combustion furnaces, in particular to a refined control method for industrial combustion furnaces. Background technique [0002] At present, in the field of combustion, improving fuel utilization through refined control means has become more and more the focus of attention. Among them, the ratio of gas / assistant gas and the mixing method of gas / assistant gas are the main fine-grained control and optimization directions. [0003] It is widely recognized that the general industrial combustion furnace adopts non-premixed combustion method, which is laminar flow diffusion combustion, and the mixing speed and contact area of ​​fuel gas and supporting gas determine the combustion effect and combustion rate; it is also widely recognized that Yes, at present, the control and monitoring methods of general industrial furnaces are relatively rough, and the degree of refinement is poor. The p...

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Problems solved by technology

[0003] It is widely recognized that the general industrial combustion furnace adopts non-premixed combustion method, which is laminar flow diffusion combustion, and the mixing speed and contact area of ​​fuel gas and supporting gas determine the combustion effect and combustion rate; it is also widely recognized that Yes, at present, the control and monitoring methods of general industrial furnaces are relatively rough, and the degree of refinement is poor. The process parameters such as excess oxygen content and furnace temperature are generally monitored as a whole of the furnace, reflecting the average level of the combustion situation of the furnace, and the pertinence is poor.

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