The effect of sulfur-containing dust in flue gas on ammonia-based desulfurization
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As the title suggests, if the flue gas entering the ammonia-based desulfurization process contains sulfur dust (undetectable to the naked eye), what impact will this have on the operation of this desulfurization method?
There is an error in your question. ““The smoke contains sulfur dust”; does this boiler burn sulfur? Boiler flue gas contains dust, SO2, and NOx. The flue gas passes through a desulfurization tower to reduce the sulfur content to meet the specified emission standards. What impact will this have on the operation of ammonia-based desulfurization? I don’t understand what exactly is being asked
President Ming, in the event of an accident in the sulfur incinerator, or when the air supply is inadequate, it is indeed possible for the flue gas to contain sulfur! But it seems that the current sulfur treatment system does not include a wet flue gas desulfurization process at the rear; if such a process were available, sulfur dust would cool down, condense, and block the pipes under those temperature conditions!
I’m sorry, I got it wrong. I thought it was the sulfur in the flue gas from the power plant boiler.
The OP didn’t specify what process was involved either. I merely shared my own understanding of it; it might not be correct!
I’m talking about the Klaus process :)
Over time, blockages in the pipelines can occur, leading to overpressure in the system, which is detrimental to its operation； In a system like yours, bag filtration is used first to remove dust and recover sulfur powder, followed by ammonia-based desulfurization.
If there is sulfur dust in the flue gas, it means the combustion is not complete; substances such as carbonyl sulfide and hydrogen sulfide are also present. These substances primarily affect the crystallization of the sulfuric acid solution used in the ammonia-based desulfurization process, leading to the formation of aggregates that in turn impact the stable operation of the desulfurization system. In such cases, the incinerator is usually modified to ensure proper combustion. If the problem persists, the slurry that has accumulated in the desulfurization tower and cannot be crystallized must be removed after some time before the system can be put back into operation. Each situation requires individual analysis; I can only provide a general direction based on the available conditions