The values of the rich liquid are different
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This post was last edited by liaifeng on 2018-9-3 at 17:49. In my unit’s regeneration section, tests show that the concentration of H2S absorbed by the lean liquid is sometimes 2%, while that absorbed by the rich liquid is 14%. But sometimes, the concentration of H2S absorbed by the lean liquid is 2%, while that in the rich liquid is 5%. Is such a low absorption level related to the small amount of acidic gas produced in the sulfur production process? If the amount of acidic gas generated in that process is low, then less H2S reaches the absorption tower; as a result, the H2S concentration in the rich liquid, as measured through analysis, is low. Am I correct? Please share your thoughts – points will be given for useful responses
The typical test parameter for lean liquid is less than 2 g of hydrogen sulfide per liter of amine solution (that is, 0.2% rather than 2%). Under normal circumstances, the concentration of the amine-rich liquid coming from the hydrogenation unit is high (with hydrogen sulfide levels above 20 g), whereas the amine-rich liquid derived from sulfur off-gases usually has a concentration of around 5 g.