Acidic water stripping towers often crystallize
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This post was last edited by 27650 on 2010-9-3 at 18:52. The acidic water stripping tower often crystallizes, resulting in shutdowns just a few days after it starts operating. I’m not sure what to do about this, especially since crystallization is severe in the feed section. The raw material used is the water separated from the bottom of tanks in various workshops; some say it’s the catalyst while others say it’s coke powder. I wonder if other companies also experience similar problems
What are the main components of the feed? Are there any major changes? What type of internal component is this tower?
The lower sections of the distillation tower use saddle rings, while those at the top use corrugated rings. Saddle rings have larger gaps, so they are less prone to clogging. In the past, we used only corrugated rings for distillation; later on, saddle rings were used in the lower sections, which reduced the risk of clogging. However, this was not for acidic vapor stripping, but rather for ordinary vacuum distillation.
The last edit to this post was made by 27650 on 2010-9-14 at 20:16. Adding polyaluminum sulfate to the raw water results in the formation of a black precipitate, while adding nothing to the output stream causes no reaction. Using filter paper allows for the efficient removal of impurities. I wonder whether activated carbon can be used for filtration, and how it should be applied. I’m also curious as to what the black precipitate is; could it be the result of a reaction with hydrogen sulfide?
Our company also faces this problem frequently, and to date we have not found a suitable solution. We have installed a filter in the feeding section, but its effect is limited – it can only filter out some of the coke powder. We have prepared activated carbon tanks, which we plan to use to see if they help.
Appropriately raising the stripping operation temperature to 65 degrees can effectively prevent ammonium carbonate crystallization.