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Lng Scrub Column For Lpg Separation From C1


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#1 Martin Khamphasith

Martin Khamphasith

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Posted 19 September 2016 - 07:04 PM

Hi,

 

I am a PhD student in natural gas processing working on building a lab scale LNG scrub column (for separating LPG from C1). The purpose of this experimental rig is to study the vapor liquid equilibrium and mass transfer in the column (dynamic and steady state), which will enable to collect valuable data to improve existing or develop new equation of states and optimize the cryogenic distillation of C1.

 

I have to implement a level meter in this scrub column but have no experience in level measurement at all. What  type do we usually use in the industry for a scrub column in a LNG plant?

 

The temperature range from -60 to 0 °C (pressure up to 20-40 bar) and the compounds are C1/C2/C3/iC4/iC5. But most of the liquid will be the heavy components.

 

Since we are at low temperature and that the liquid density is not constant, what kind of level meter do you suggest me to use? I briefly read somewhere that tonar type with probe might suit ?

 

The scrub column is to be operated with a packed ed (random or structured).

 

Please advice.

 

Thank you very much

 

Martin



#2 Starlord25

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Posted 29 September 2016 - 01:12 PM

I'm only studying a HNC so could be massively incorrect on this but....
What about using a radiation based level indicator?

#3 breizh

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Posted 29 September 2016 - 09:09 PM

hi ,

As suggested above you may consider radiation level measurement , I 've been using this technology on distillation columns equipped wit BX packing .

 

Consider to talk to the vendor below .

 

Hope this helps

 

Breizh

 

https://www.berthold...vel-measurement


Edited by breizh, 29 September 2016 - 09:09 PM.


#4 Bobby Strain

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Posted 30 September 2016 - 04:50 PM

Magnetic floats are not hazardous like a radiation device that might require a license to use.

 

Bobby



#5 breizh

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Posted 30 September 2016 - 07:47 PM

hi ,

Bobby is totaly right , strict control of the source is a must , apply for registration and on top be trained to operate this technology .

 

note : about principles take a look at the attachment .

 

Good luck.

 

Breizh  


Edited by breizh, 30 September 2016 - 09:39 PM.





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