Alkali consumption of catalytic flue gas desulfurization devices
Thread Content
As environmental regulations become increasingly strict, catalytic units in various refineries have been equipped with flue gas desulfurization systems. Most of these systems use the alkaline desulfurization method. Could everyone share the amount of alkali used per unit of production in their own companies? In my facility, the consumption of alkali has been relatively high, at 10 kg of alkali per ton of crude oil processed
It’s more or less the same; ours is at this level as well. Additionally, the consumption of fresh water is too high. . .
Water consumption is definitely significant; if the amount of water used is low, the catalyst content in the water discharged from the bottom of the tower will increase
The amount of catalyst is still related to the leakage rate; if there is significant leakage in the regenerator, the load on the filter press simply cannot keep up, and pressure must be maintained at a constant level. I think the reason for the high water consumption is that the temperature of the smoke is a bit too high, which vaporizes all the water. This will lead to abnormal operation of the slurry pump at the bottom of the tower; an excessive amount of catalyst can wear out the impeller, and this is also a problem that must be addressed. To reduce wear, it is necessary to add water to dilute the slurry.
Regarding water injection, I agree with Wutong’s view; our consumption of alkali solution is between 4 and 6 kg per ton of raw material. Furthermore, there are differences among various units when compared horizontally due to variations in the sulfur content of the raw materials and their regeneration methods. Please be informed, OP. To reduce alkali consumption, the use of sulfur transfer agents can be considered. To reduce the water volume, it is advisable to lower the temperature of the flue gas before desulfurization to dew point temperature + 20°C. Personal opinion.
Does the dew point temperature of the flue gas before desulfurization need to be calculated?
The calculation is inaccurate; it can be measured directly.