By what phenomena can foam formation in the amine solution of the circulating hydrogen desulfurization tower be detected?
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This post was last edited by shirleyzjm0219 on 2012-4-27 at 14:39. Yesterday, the technicians noticed foaming in the amine solution. How can one determine whether there is foaming in the amine solution of the cyclic hydrogen desulfurization tower, based on the effects of the antifoaming agents added to it? Is there a seasonal pattern in amine solution foaming? Foaming was detected that night; what were the temporary measures taken? (Anti-foaming agent added during the second day) Foaming phenomena: 1, increase in the level of the low-pressure liquid phase; 2, ? 3, ? 4, ? ......
It should be that there is a problem with the circulating hydrogen desulfurization tower and it starts to foam before being sent to the small high-pressure unit. For example: 1. The differential pressure in the cyclic hydrogen desulfurization tower increases. 2. The liquid level in the circulating hydrogen desulfurization tower fluctuates significantly; the liquid level valve also fluctuates and gradually closes.
Thank you for your answer! What is a temporary solution for amine solution foaming at night when no defoamer is available?
The most immediate temporary solution is to reduce the amount of lean amine solution fed into the tower, in order to prevent amine solution from entering the low-pressure high-temperature section. Make sure the level valve is set to manual mode to prevent pressure crossover. Subsequently, corresponding measures will be taken based on the analysis of the reasons for foaming.
Generally, there is a process interlock between the low liquid level and the recycle hydrogen compressor; it is recommended to shut down the recycle hydrogen desulfurization system and restart it only after the foaming phenomenon of the amine solution has improved significantly. The device during this period can reduce the processing volume and prevent excessive hydrogen sulfide levels in the recycled hydrogen. After all, safety in production comes first.
What are the main manifestations of foaming?