Our 5.5-meter coke oven with dry desulfurization system has been in use for 3 years, and it has been very unstable recently, with frequent cases of SO2 levels exceeding the allowed limits. What could be the reason?
Thread Content
Our 5.5-meter coke oven with dry desulfurization has been in use for 3 years, and it has become very unstable recently, with frequent cases of SO2 levels exceeding the limits. What could be the reason?
The desulfurizer needs to be replaced. The desulfurizing agent inside the tower has agglomeration, causing abnormal gas flow
Which dry desulfurization method, SDS or calcium-based dry desulfurization?
There are many factors: the uniformity of the spray gun, the activity of the catalyst, the stability of gas purification in the preceding stage, the amount of catalyst injected, and so on
If the dry desulfurization system is checked and is operating properly, then the hydrogen sulfide level in the gas returning to the furnace must be excessively high
Is there leakage in the coke oven? There are many factors to consider, such as whether the flue gate is leaking air or not!
The dry method mentioned by the poster refers to nano-scale calcium hydroxide or ultra-fine sodium bicarbonate; one can first check the fineness, the uniformity of the spraying distribution, and the performance of the bag filters in capturing particles； If everything is fine, attention should be paid to fluctuations in sulfur dioxide levels in the coke oven flue gas, any leaks in the oven structure, and whether the sulfur dioxide levels exceed the specified limits
There is a deviation in the gas flow; the desulfurizing agent inside the tower has become caked, and the material discharge is uneven
Sale of highly active calcium-based desulfurization powder①⑧③②②⑥①⑨⑧⑧⑨