For waste heat recovery systems, how should the pipelines in the convection section be cleaned?
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Due to an operational accident, naphtha mixed into the fuel gas; as it did not burn completely in the furnace, black carbon deposits formed on the pipelines in the convection section. This caused the flue gas temperature to rise. Is there any way to clean these deposits online? I heard there’s an online cleaner; where can it be bought?
The so-called online cleaning agent may be an inorganic salt that is periodically scattered into the furnace; as it moves with the flue gas to the upper part of the furnace, it comes into contact with the dust and thus helps to loosen it； I have used it before; its performance was poor and it was corrosive. If the fuel quality is low, it is recommended to use shock wave soot blowing.
My supervisor here also heard about such a thing – it’s something like a small explosion outside the furnace tube, which blows away the carbon deposits on its surface. It is not possible to stop operations now, as the conditions for installing online soot blowers are not met. What is the name of the inorganic salt you are using? I’ll check again
It’s been too long; I can’t remember clearly. You should be able to find out by consulting your furnace manufacturer.
Is it possible to remove some unnecessary measurement points and use instrument air to purge the related areas? I also agree with the suggestion made by a fellow traveler above; the issue of dust accumulation is a persistent problem, and it’s best to take preventive measures as early as possible using devices such as shock wave soot blowers!