Hi Folks,
I'm looking for some options. We have a NGL stream that is treated (liquid treating) with Amine and exits the facility. This does not always meet the NGL spec which says no free water at 34 F (tested by observation in a separator). We need to remove the water (15 ppm free water at 60 deg F) prior to the fence line. One path in consideration is using a mole sieve unit (expensive). Another option is moving to inlet treating (also expensive). I'm looking at other options like a refrig unit to chill the NGLs to 25 F in order to drop the water out. However, this requires using a hydrate suppressor like methanol or ethylene glycol. Injecting methanol also means possibly using a water wash, that puts us back where we started. Removing ethylene glycol is difficult (I hear) and may be done by fractionation. Is this true? My simulator shows me that ethylene glycol and water "fall out" at 25 deg F in a separator. Any input regarding your experience in the matter or other options that exist would be great.
Thanks
Motrack
Edited by Motrack, 17 January 2018 - 10:50 AM.