Benzene tower temperature difference issue
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Recently, there has been a temperature difference issue with the Benta unit. I would like to ask the experts what could be the cause? The benzene tower was designed to have a benzene extraction capacity of 2.7 tons, but the current extraction amount is 3.8 tons, mainly due to the high benzene content in the feed. The temperature is high after air cooling, reaching 75°. Is this related to the large amount of benzene? The reflux volume in my shift was 19 tons; 3.8 tons were drawn off, with a temperature difference of 3.1°. In the next shift, the reflux volume was reduced to 17 tons, the amount drawn off was decreased from 3.8 tons to 3.1 tons before being increased back to 3.8 tons again. The temperature difference for benzene increased from 3.1° to 26°. What is the reason for this? In my opinion, it’s due to low traffic volume.
It’s possible to have it checked; actually, the benzene content in what’s extracted might not be that pure anymore. From your description, it seems that other components were also extracted. It should be due to a reduction in backflow
Benzene from the side line is extracted from the fifth tray; the temperature difference in the benzene column increases
Thank you, but I think it’s due to the backflow not keeping up in time, as the temperature of the lower sensitivity plate didn’t rise. I’m not sure what your opinion is on this