Where does the waste amine solution in the tower and pipelines go when the amine solution regeneration unit is shut down?
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Is it that amine solution preparation and recovery tank that retracts underground? For this, what is the typical circulation volume of amine solution required for tanks of what size? If this tank can’t hold it, will it be transferred to the lean amine tank? Please give me some advice, O(∩_∩)O. Thank you @ylb913
Most of it is first returned directly to the amine liquid circulation tank; only that which cannot be returned enters the underground amine liquid preparation tank.
Doesn’t this contaminate the originally clean lean amine solution entirely?
For over twenty years, we have not artificially discharged any “waste” amine solutions. There’s no place to queue; even if you want to queue, there’s no one to take care of it.
Well, for example, there’s still rich amine liquid that hasn’t been thoroughly stripped in the regeneration tower, as well as residual rich amine liquid in the pipes and such
It’s not that serious; everything just flows back into the amine liquid circulation tank and the amine liquid storage tank.
So, are your amine liquid storage tanks classified as Category A or Category CB for consideration?
For short stops, there is no need to withdraw the material; for long stops during maintenance: 1. In coking and hydrogenation units, catalyst systems usually have buffer tanks, which can store a portion of the material. 2. This facility has buffer tanks as well as underground solvent recovery tanks, so there’s no need to worry about contamination. Before resuming operation, the system will be heated and circulated for 8 hours, and it will be connected to other units once the system becomes stable. The solvent doesn’t cause any problems. Once the device stabilizes, the resulting lean liquid is sent directly to an external device for further circulation.
I’ve learned something. . . A newcomer to the design field like me doesn’t know all these things on site; thank you. Also, I would like to ask whether, when planning the layout of the equipment for this amine liquid tank, it is classified as Class A or Class CB?
I’m sorry, I’m not really familiar with this. I’ve been working as an operator for 8 years~~ I don’t know much about design aspects, but the amine solution is MDEA. . The scientific name is nitromethyldiethanolamine; you can search for that, it might be helpful
MDEA is indeed propylene oxide, but as you mentioned earlier, there’s a possibility that the rich amine solution could also be introduced into the system; in that case, the H2S content in that rich amine solution needs to be taken into consideration. It seems necessary to upgrade the material grade and other related specifications of the tank used for storing the lean amine solution. .