Oxygen content in the heating furnace

A oxygen content of 3% in the radiation chamber and 10% in the flue gas usually indicates that there may be some issues during the combustion process. There could be several reasons for this phenomenon: 1. Excess air coefficient is too high: If too much air is supplied to the furnace, it leads to incomplete combustion, thereby increasing the oxygen concentration in the flue gases. 2. Inconsistent mixing of fuel and air: If the mixture of fuel and air is not sufficient or is uneven, some of the fuel may not have enough oxygen for complete combustion, resulting in unreacted oxygen in the exhaust gases. 3. Incomplete combustion: Due to issues such as poor fuel quality, aging combustion equipment, or improper configuration, incomplete combustion may occur, resulting in an increased oxygen content in the flue gases. 4. Air leakage: Poor sealing of the furnace body or flue pipes can allow outside air to enter, thereby increasing the oxygen content in the flue gases. To accurately determine the cause of the problem, a detailed inspection of the combustion system is required, including checks on the pressure and temperature inside the furnace as well as the flow pattern of the flue gases. Various factors such as the type of fuel and the methods used for adjusting combustion also need to be taken into consideration. Solutions may include adjusting the air supply, improving the mixing of fuel and air, enhancing combustion efficiency, or fixing air leaks. .

If there are areas where air is leaking, check the bottom of the chimney and the flue part of the furnace to locate the leaks, seal them up, and then see if the problem is resolved.