Share your experience with secondary combustion in the heating furnace
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Has anyone experienced secondary combustion in a heating furnace? Whether it’s a barrel furnace or a square furnace, top-fired or bottom-fired, with conventional burners or low-nitrogen oxide burners – share your experiences with various types of heating furnaces.
Secondary combustion refers to the process in a heating furnace where the unburned fuel gases react again with oxygen in the air under high temperatures, releasing additional heat. I have experienced secondary combustion when using a top-fired furnace to heat steel. This heating furnace uses conventional burners, and the temperature inside the furnace is extremely high, which causes unburned gas to remain within the furnace. When these fuel gases come into contact with the abundant oxygen present in the furnace, secondary combustion occurs. While this phenomenon improves thermal efficiency, it also increases the requirements for burner and furnace materials to prevent overheating damage. .