Fluctuations in differential pressure in the dry gas desulfurization tower
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The catalytic dry gas desulfurization tower we use features floating valve trays, and there is a slight amount of liquid present in the dry gas (the volume of the dry gas liquid separation tank is 56.52 m3, and the liquid level can rise to 10% over 24 hours). There is a lot of foam in the ethanolamine samples – will this cause an increase in the tower pressure drop? As the dry gas outlet pressure increases and the volume of dry gas rises, the circulation rate of ethanolamine can be increased, resulting in no pressure drop. Could the experts here give me some advice?
The amine solution has formed foam; you need to carry out filtration, and you also need to find a way to remove the thermostable salts!
I believe that increased export pressure suppresses the foam in the amine solution, thereby reducing the pressure drop； Only then can the gas volume and amine liquid circulation rate be increased ； I’m not sure if it’s correct.
Could we add a suitable defoamer to give it a try?
This post was last edited by qhhqhh on 2017-6-10 07:52. Try reducing the temperature of the dry gas entering the tower (add a cooler before the dry gas enters the tower)
Liquid flooding in the tower is evident; it is necessary to identify the tray where flooding occurs.
If a low ammonia level results in less reflux due to foam entrainment, increasing the pressure and ammonia level restores normal operation; this is generally the issue at hand. As for whether excessive impurities in the ammonia-poor liquid cause foaming, laboratory analysis is required.