Isobutane removal tower
Thread Content
We are unable to increase the bottom temperature of our isobutane stripping tower; the opening degree of the reboiler steam control valve can only be set between 20% and 30%. When we asked why, we were told that increasing the opening degree would actually cause the bottom temperature to drop. What is this question asking? It results in isobutane making up dozens of percent of the material in the n-butane distillation column. Even nearly half. Please give me some advice, seniors.
This post was last edited by hlcl on 2016-6-16 at 11:01. I suspect there’s a problem with the bottom liquid level of the tower; raising it should solve the issue. ““The bottom temperature drops even though the steam flow is increased” is because a large amount of the medium vaporizes, resulting in too little liquid phase returning to the bottom of the tower.
How many kilograms of steam are used by the reboiler? Is it a problem with the condensate water system?
Is there a flow display on the steam pipe at present? Did the steam flow increase when the control valve was opened wider?
A vertical reboiler, it’s prone to gas blockage
For the isobutane removal tower, this steam is superheated steam; the latent heat of vaporization is not fully utilized, which results in poor heat exchange efficiency. It is recommended to use low-pressure steam or steam under reduced pressure.