How to design a distillation column with a small diameter? ? ?
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Based on experience, the structure of a small-diameter distillation column differs from that of a large-diameter one. For sieve plate towers, circular downcomers should be used. There are no examples of such downcomers in standard textbooks, so it is unclear how to design their structural dimensions I hope the experts can give me some advice. Thank you!
I’m not sure just how small the diameter of the small tower you’re referring to is; I have worked with plate-type experimental towers with an ID50 value. For experimental towers with generally small diameter (ID50 or less), the design load is relatively low; the F factor for perforated towers is around 0.5. As a result, the plate spacing (usually less than 100 mm) and the weir height (10–20 mm) are low. The downcomers are typically circular in shape, and their area is calculated based on the liquid residence time. It seems there are no specific references either; it’s just a tentative design.
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If the tower diameter is very small, a packed tower may be considered instead of a plate tower; as for whether to use loose packing or structured packing, this generally depends on the process system and operating conditions.
A tray column without downcomers can be used, or a packed column can be employed.
Without a downcomer, how does the liquid flow downward? Thank you!
Indeed, the relevant dimensions are determined by referring to tower equipment design documents and engineering experience. :)
Designing a small distillation column requires different design methods depending on its intended use.
I don’t think the design of distillation towers is that complicated. I’m an amateur, haha. Could someone explain the internal structure of distillation towers? Is there any information available on their internal structure, as well as that of powder drying furnaces and fluidized bed reactors?
A tray without a downcomer must be something like a plug flow tray.