Does a distillation tower need insulation? To what location should the tower top reflux be returned?

This post was last edited by CHANGBAISHI on 2019-6-8 at 10:01. The principles of distillation columns are similar, but it needs to be specified whether insulation is required for use in a particular process flow. In a distillation column, without reflux liquid, it is impossible to carry out mass and heat transfer for the rising gas during distillation. Where will it go? It has been decomposed; the resulting liquid returns to the bottom of the tower, but it is by no means in its original state, with the same composition as the feed liquid. It is recommended to start with the basics; there is a section on distillation in the book \"Principles of Chemical Engineering\" – take a look and you’ll understand. You have only seen the circulation pump; there should also be a discharge port. Materials that have been separated cannot be completely turned back into reflux liquid. Alas,,, to be honest, you’d better give up on it; it really isn’t suitable for you. It is recommended that you go through all the questions you’ve posted; from them, it will become clear why you are not suitable for this job. If you go ahead with this, it will hold back your career prospects; a kind reminder :) Sorry, I made a mistake with the most important subject, \"Principles of Chemical Engineering\". That was too casual, I’m very sorry :handshake:)

Distillation requires insulation, right? Anyway, every example I’ve seen used insulation. The reflux at the top of the tower generally returns to the top of the tower; in some cases, it returns to the upper part of the tower as well. Does the circulation pump at the bottom return to the top of the tower? I really haven’t seen this before. I can’t figure out why go to the top of the tower.

Insulation, to protect against external temperature influences

Before criticizing others, look at yourself first – there are so many spelling mistakes. Too many people working in the chemical industry, especially in the field of fine chemicals, lack a solid foundation in chemistry. Be more polite

The position of the reflux liquid at the top of the tower is related to the content of light components in that reflux liquid; theoretically, the content of light components returning to the tower plates is equal or similar

99% of distillation towers require insulation

Whether insulation is needed depends on the temperature. However, distillation towers are generally energy-intensive and usually require insulation. The top reflux generally returns to the first tray of the tower, that is, the tower top. As for what you mentioned (the bottom circulation pump returning to the top of the tower), this type of design is indeed rare, as it increases energy consumption!

Insulation is needed, I’ve never seen a case where it’s not required. Return back to the first tray of the tower

The question is too general; it would be better to specify the exact process, the components being separated, whether it’s the product from the top of the tower or from the bottom, etc

:Sleepy: The original poster must have made a mistake. If the material goes from the bottom of the tower to the top, then what’s the need for distillation? Is it possible that the pump is located at the bottom of the tower, but the material comes from the top? You can look up relevant information on distillation, or ask the employees in the workshop; it should take about half a year to figure it out. . .