What are your suggestions on ensuring negative pressure in the bottom-blown furnace and preventing smoking at the feeding port?
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When a bottom-blown furnace is used in combined production with sulfuric acid, restarting operation after shaking the furnace often results in a negative pressure issue, with smoke coming from the feed port. Increasing the speed of the high-temperature fan and the sulfuric acid fan does not resolve this problem either; however, after 2–3 days, the negative pressure improves and no more smoke appears from the feed port. I would appreciate any insights from everyone!
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Do you still think it is the negative pressure issue caused by air leakage?
It must be that the fans at the front and back aren’t properly matched! The speed of the rear-stage fan is too low, or the air volume of the front-stage fan is too high! It’s also possible that there is a leak somewhere, resulting in insufficient negative pressure