Incomplete combustion caused by leakage in the burner assembly
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Due to its location, the burner flue is prone to leakage; when the amount of raw gas that leaks in is small, the excess heat in the flue cannot be controlled, leading to high temperatures. If the amount of leaked gas is large, incomplete combustion in the flue results in lower temperatures. Once the leakage is resolved, the flue combustion resumes and the temperature returns to normal. The plant has built a new single-sided flue, regenerator compartments, a blower unit side, and a coke oven on the exhaust gas tube side. When using coke oven gas for heating, it is necessary to purge the carbon deposits accumulated in the grid bricks whenever there is a leak on the machine side; otherwise, the air supply becomes severely insufficient, and in severe cases it may even be necessary to use an inclined chute. Is this a common issue with regenerative chamber segmented coke ovens, or is it a problem specific to coke ovens with single-side flues?
After the leakage issue on the first floor is resolved, the carbon black that has accumulated on the grid bricks and inclined channels during the period of leakage cannot be carried away by the exhaust gases. Moreover, as the gas in the burner channels heats up during ascent, it cannot burn completely due to a lack of air. It must be purged to function properly. May I ask, do all regenerative chamber coke ovens have this problem? Is it still the issue with the single-sided flue coke oven?
Has your great skill run into a new problem? In fact, the core of this problem lies in the leakage in the burner’s flame channel. The raw gas that leaks into the burner flue does not burn completely, resulting in graphite deposits forming on the grid bricks. This is not related to the single-sided flues or the partitions of the regenerator; the key issue is that the amount of raw gas leaking in is too large. In coke ovens with unpartitioned regenerator chambers, the graphite deposits resulting from leakage do not completely block the grid bricks at the lower part of the flame channels, and this is due to the different airflow distribution in unpartitioned regenerator chambers as compared to those with partitions. Of course, with the use of a single-sided flue, there will be a difference in the exhaust gas flow rate between the regenerative chambers located far from the flue and those located near it; the slower the flow rate, the more carbon deposition will occur. The key to solving this problem lies in stopping the leaks.
This post was last edited by 26722672 on 2022-7-31 at 19:58. The tiger’s analysis is very accurate. Yes, dividing the regenerator into sections causes downward airflow to concentrate, while a single-sided flue results in a relatively lower dynamic pressure on the side far from the exhaust stack; all of these factors are unfavorable for carbon black to be carried away with the exhaust gases. But does this occur in other single-sided flue, regenerative chamber segmented coke ovens? The forum is too cold; Tiger has extensive connections, so I’d appreciate it if you could ask him.