Seeking help with water removal after shutting down and cleaning a distillation tower
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The distillation tower was washed with alkali, followed by water washing and then purging with nitrogen; the dew point was found to be within acceptable limits. However, once operation resumed, the water content in the reflux tank became high. I would like to ask experts how to deal with this issue? I also have a question regarding the water-in-oil structure: what is its structure like? What effect?
Reply to 2# Xingtai Xiaobai: Well, our reflux tank doesn’t have a water layer; if the ratio of toluene to water is low, there shouldn’t be any separation either. The reflux drum also has a low dew point, as does the tower; this is likely due to moisture not being completely removed from the pipes, insufficient purging time, or perhaps some dead corners on the tray surfaces where nitrogen cannot reach, which prevents the water from being eliminated. If it’s one of these two situations, is there any simple way to remove the moisture?