Sulfur recovery technology

The composition of the feed exhaust gas, the calorific value of the fuel gas, and the amount of air supplied all play a role!

When the air supply to the sulfur production furnace is excessive, the ratio becomes low; as a result, the hydrogen sulfide produced in the hydrogenation reactor increases, but the amount of hydrogen decreases. In this case, is the temperature of the flue gas incinerator high or low? Does hydrogen sulfide have a greater impact on the temperature of the flue gas furnace, or does hydrogen? (But hydrogen sulfide is absorbed in the exhaust gas absorption tower)

This post was last edited by liaifeng on 2021-3-29 08:36. With excessive air supply, relatively more hydrogen sulfide is converted into sulfur dioxide under normal circumstances. The hydrogenation step is a reduction reaction that is exothermic; more hydrogen is required for this reaction. In practice, to ensure the reduction reaction takes place, slightly more hydrogen is used than theoretically necessary, and the excess hydrogen is burned in the incinerator. Provided that the solvent absorption efficiency is maintained, the amount of hydrogen sulfide that reaches the rear incinerator is minimal (exceptions apply in case of abnormal operations) ； The excess hydrogen cannot be absorbed by the solvent, so whatever amount is present ends up in the incinerator to be burned! Regarding what you mentioned, I have also noticed in my daily operations that initially, controlling the amount of hydrogen used was employed to balance such fluctuations; later on, it became clear that the cause of these fluctuations lay in the front section – once the air distribution there was properly controlled, the situation stabilized in the rear as well. Therefore, our focus now is to ensure stable and appropriate air distribution. Sulfur unit: the front part is stable, and there’s basically no issue with the rear part, unless there are problems with the solvent system.