Urgent: low concentration of decarburization solution
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The last edit to this post was made by leo_0088 on 2010-11-6 at 11:06. The concentration of the MDEA decarboxylation solution dropped from 300 g/l to 160 g/l within 16 hours; the workshop added 1.4 tons of MDEA decarboxylation solution, yet the concentration continued to decline, and the CO2 content in the decarboxylation gas exceeded the specified limits. Why, even though the process hasn’t changed and so much solution has been added, doesn’t the concentration increase?
1. It may be a system leakage； 2 is a foggy liquid film.
Poor regeneration effect? Haven’t seen it before; I hope some expert will show up
This post was last edited by Chemical Gas Purification on 2010-11-13 at 15:13. Does the liquid change and undergo decomposition? Has the circulation volume and liquid storage volume decreased for the poster, or has the purity of the decarburization liquid decreased? It’s because the circulation volume and liquid storage volume have decreased; in most cases this is due to leaks, or else some other reaction has taken place.
Has a large amount of water entered the solution? If that’s the case, dilution will cause the concentration to drop. Check for leaks – thoroughly inspect all areas where water might be entering the solution system
Reply to 4#: In chemical gas purification, the purity of the decarburization liquid decreases. Currently, the solution with low concentration in the separation tank is discarded without being recycled; it takes at least three to four days before the amine concentration rises again
Reply to 6# leo_0088: So in other words, the total amount of decarburization fluid has increased, right? That is due to too much moisture being entrained in the gas phase; pay attention to the gas-water separator before the equipment and increase waste discharge.
It’s possible that there is too much water in the separator at the inlet of the absorption tower; it’s also necessary to check the regeneration temperature, as it is very important
Reply to 8# Primary School Student 009: Be more specific. What is the impact of the regeneration temperature on the concentration of the decarburization solution?
It seems that the water balance isn’t well controlled; the solution isn’t losing volume, but it’s diluting quickly
Reply to 10# arrow51: So how is water balance controlled? Reduce the water-carbon ratio? Add a medium-pressure gas water separator?