Operation of a distillation tower
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How to maximize purity through distillation tower operation. I would appreciate some advice from those who are more experienced; all I know is to increase traffic volume. Increase the steam. What other methods are there to reduce extraction?
To improve purity, it must be done on the premise of a stable system. I don’t know, upstairs – is the product taken out via a side stream or from the top of the tower? If guessed at the top of the tower, the reflux is suppressed to prevent the heavier components in the tower from vaporizing as much as possible. If extraction is to be carried out via a side line, the extraction temperature is influenced by the feed rate, the pressure inside the tower, the reflux rate, and the steam volume at the bottom of the tower. You can also use 2 towers, right? Crude distillation and refined distillation.
Take a look at the post by the expert: http://bbs.hcbbs.com/viewthread.php?tid=320168
My skills are limited, but I still think it’s necessary to first stabilize the system; only after that can various parameters be fine-tuned. Achieving stability and efficiency is surely the best goal
If the purity at the top of the tower is increased, the feed inlet can also be lowered, or a colder feed can be used.
We extract it from the top of the tower. When distilling the 123456 components, we need the purity of component 3 to be above 90%, but components 4 and 5 keep ending up at the top of the tower; increasing the reflux flow or adding steam does not yield very good results
The precision feed temperature cannot be changed. It’s possible to improve the material points, but why?
It’s simple to explain. The feed inlet is moved downward, the distillation section becomes taller, the separation efficiency of the distillation section improves, and the purity of the volatile components at the top of the tower increases. But there is a cost: there are also more volatile components in the tower bottom.
The temperature of the concentrated feed cannot be changed; improving the feeding point can help
Multi-stage distillation can be employed; for example, using a three-column distillation process for methanol distillation yields product quality that is better than that obtained with a two-column distillation process (of course, the choice of three-column distillation also takes energy savings into consideration).
From what you’ve said, it seems that the heavier components haven’t been separated. You can try lowering the temperature at the bottom of the tower to see if that helps
There’s also pressure regulation! Because the greater the pressure, the higher the boiling point! If you increase the tower pressure, the stirring will be more thorough, but less material will be stirred! But this is not what we hope for!