Heating method of the distillation tower
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What is the difference between an external reboiler and steam heating inside the tower for a distillation column’s reboiler? For steam heating in a tower, is steam introduced directly into the tower, or is a coil-type heat exchanger used to deliver the heating steam inside? Please help to answer, thank you!
In steam heating within a tower, steam is directly introduced into the tower for heating; as a result, the condensate water from the steam cannot be recovered, and it may also lead to an increase in waste discharge. Coil-type heat exchangers can be used when the heating load is low. An external reboiler can solve the above problems.
There are internal and external types; internal types have a higher heat utilization rate and lower equipment investment, but they are only suitable for applications with high heat transfer requirements when used externally； For those in which steam is introduced directly into the tower, it is generally referred to as a gas; in the context of distillation, this constitutes an additional impurity, and such methods can only be used for the rough separation of certain substances.
Think about this question: a distillation tower is used to separate two or more substances. If you introduce steam directly into the tower to heat the materials, you are essentially adding another component. What if it’s difficult to separate the original materials from water? How will you carry out the separation then? It works on the same principle as a reboiler. As for the heating medium, there is medium and high pressure steam as well as heat transfer oil.
Study*, can’t get the sofa; there are no other opinions, only study*.
Generally speaking, laboratory glass instruments are heated by electric heating wires, while in industry they are heated by steam and heat transfer oil.
Bro, are you in the chemical industry? The heating equipment is located inside a jacket, and the heating medium flows within that jacket; it does not mix with the substance being purified. Do you understand?