Analysis of the reasons for blasting in the basement and corresponding measures
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What causes the issues of dual flue channels, exhaust gas recycling, and blasting in the basement after the conversion of coke ovens using coke oven gas? What are the hazards associated with these problems, and what effective measures should be taken? I seek advice from experts in this field.
This post provides a detailed introduction: http://bbs.hcbbs.com/viewthread.php?tid=547572&highlight=%B7%C5%C5%DA
The main reasons are as follows: leakage from the lower nozzle and its surrounding area； Low pressure in the coking coal branch line, resulting in detonation due to tempering” ； The exchange plug switch is not in the correct position; the plug does not rotate enough, or even after reaching 90° it still isn’t fully closed, which allows the leaked gas to mix with the air entering through the carbon removal port and leads to an explosion ； The residual gas from the upward airflow mixes with the air entering through the carbon removal holes, resulting in a \"blowout\"” ； The grinding of the plug core and the housing is inadequate, or lubrication is not applied in a timely manner, resulting in external air being drawn in ； The sealing surface of the exchange cock is small, and air and coal mix towards the end of the exchange process. Solution: ① Ensure a tight fit of the lower nozzle and its surrounding area ； ②Reduce the diameter of the coking coal branch pipe and increase the gas pressure to prevent backfire ； ③Strengthen inspections and address gas leaks in basements promptly ； ④Properly adjust the heating stop time during exchange ； ⑤The adoption of centralized lubrication technology effectively solved the problem of \"blasting\" caused by leaks resulting from a lack of oil” ； ⑥When designing the switching plug, the tee surface is appropriately reduced while the sealing surface is increased.
I’ve learned it; thanks for the insightful analysis, Haiyou.