In our tests of certain industrial furnaces on Gongcai.com, it was found that most furnaces are in a rich oxygen combustion state, with an air consumption coefficient generally ranging from 1.5 to 2.3. The oxygen content in flue gas typically falls between 8% and 12%, indicating that the actual air supply is significantly greater than the theoretical requirement. Therefore, the detection, analysis, and control of the combustion quality of industrial furnaces have a significant impact on energy conservation, reducing consumption, and environmental protection, and hold great practical significance.

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