May I ask what purpose this bend serves?
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There is such a bend at the top of each distillation column – what is its function? It is sometimes present in the tower bottom as well.
This bend is usually part of a condenser or reflux device, used to condense the vapor at the top of the tower; it liquefies part or all of this vapor and returns it to the tower in order to control the purity of the product and the separation of its components during the distillation process. The bend in the bottom of the tower may be intended to draw out the bottom product or to provide a steam cycle. .
The reflux stream at the top of the distillation tower is intermittent, varying in volume from time to time; a bend is added to ensure a steady flow of reflux into the tower.
Liquid seal to prevent gas from inside the tower from entering the condenser directly, for reference.
“The function of the submersed bend is to prevent gas from passing through along with the liquid. Some experienced workers came up with such a method to prevent air leakage, and it’s quite effective as well.
Liquid seal to prevent steam from the top of the distillation tower from entering the reflux tank directly :)
Liquid seal function to prevent gas from escaping
This post was last edited by feilong213_NQPB on 2024-5-7 at 15:56. It is likely a liquid seal that prevents gas from entering, allowing only liquids to pass while blocking gases; it also plays a role in stabilizing the flow rate. Our tower tops are equipped with pumps for reflux; we have never seen a situation where flow occurs by gravity alone. This design relies on pressure differences and level differences between towers to enable gravity-driven flow.
Compensate for pressure fluctuations and maintain stable pressure at the top of the tower