Regarding the distillation column issue, what about sending the feed with a higher concentration directly to the reboiler at the bottom of the column?
Thread Content
There is a distillation column that receives feed in two forms: the less concentrated material A1 and the more concentrated material A2 are mixed together before being fed into the middle part of the column. The concentration at the bottom of the column is roughly the same as that of A2. Now, assuming that the thermal load on the distillation column remains unchanged, if A2 is fed directly into the reboiler at the bottom of the column, and the feed amounts of each material remain constant, what changes will occur in the products at the bottom and top of the column? I would appreciate it if someone could help analyze this.
The concentration at the bottom of the tower and a2 are basically the same; then why is it necessary to use this tower?
The person upstairs asked a good question: the heavier components should be recovered from the bottom of the tower. If the concentration of A2 is the same as that of the material recovered from the bottom of the tower, then why is it necessary to feed it into the tower? Entering the tower goes straight to the reboiler – can the reboiler still boil?
The two materials have different compositions and volatilities; since they go directly to the bottom of the tower without being separated, why go through the tower at all?
If you go straight into the reboiler, won’t there be only one tray? Can the product still meet the standards?
Without adding additional heat exchangers, by feeding the material directly into the reboiler to maintain the tower’s heat load, how should this be analyzed? It’s just an idea I have; I’m not sure if it will work
I just want to ensure that the heat load remains constant, so as to support the subsequent processing stages. But I’m not sure if this idea will work; if the material is not sent to the reboiler but mixed directly with A1, then a heat exchanger will need to be added
Wrong; it’s a mixture with the material coming from the bottom of the tower, not A1. A heat exchanger needs to be added, and this material has the same concentration as that at the bottom of the tower – that’s why I came up with this idea
It is possible to adjust the process parameters appropriately; it’s not impossible to do so. Increasing the low-temperature setting can reduce the top pressure, while reducing the reflux amount can also help
The reboiler at the bottom of the tower should remain in a boiling state; adding material will disrupt this boiling process and affect the distillation efficiency, which is not desirable.