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Gas Plant Question


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#1 cham3775

cham3775

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Posted 18 June 2019 - 06:58 PM

Hi,

 

I've recently been asked the following question from an industrial professional, however, I do not have any background knowledge in gas plants, and I would like to receive some guidance on how to approach this question.

 

The question is as follows: In a traditional gas plant set up, the Inlet Gas is first routed to an inlet separator. The Hydrocarbon Liquids from the inlet separator are “stabilized” in a Stabilizer. At times recycling the stabilizer overheads gas back to the inlet of the Inlet Separator is not advisable, can you explain why this would be the case?

 

 

Thank you!

 

 

 

 



#2 Sowunari

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Posted 19 June 2019 - 02:17 AM

Hi cham,

 

It is not advisable because the overhead gas from the stabilizer is at a reduced pressure. The feed gas (inlet gas) is flowing at a high pressure to the gas separator,  recycling the gas back to the inlet of the inlet gas separator might require a compressor to increase its pressure.I would say it is a waste of energy.



#3 Chemitofreak

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Posted 19 June 2019 - 03:38 AM

Hi,

 

From where has this question arise (unless there is a turndown issue)? Asking out of curiosity.

 

What is the point in separating gas from Oil and water, then again compressing and mixing it at the upstream.


Edited by Chemitofreak, 19 June 2019 - 07:24 AM.





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