1 reply to this topic

[weldsv]

Dear all,

we have TEG dehydration unit with standard regeneration system. The problem is that a lot of condensate is going after still column. We have about 70-80% of hydrocarbons in reflux condensater steam. What can be reason?

[ColinR33]

If you want an useful repsonse more information about the system would is needed, such as a PFD, operating conditions and feed gas analysis.  I have however seen just such a situation before, gas was coming in quite cool, it was much richer than what was designed for, and there was no glycol flash drum. When I took a sample of the still column vent gas and cooled it down it was 50/50 Water/HC liquid , two very distinct layers.  So, knowing absolutely nothing about your system, I would ask you first, is there a glycol flash drum where you can separate the HC from the TEG?  Next question - incoming gas composition and temperature?  Lean TEG temperature? (if lean TEG entering the contactor is below the feed gas temperature you can get a lot of HC condensing).

 

Cheers,