Coalescer Design

[RRE]

I am presently attempting to remove liquids from a natural stream at ~800 psi. The stream contains glycol (TEG) and lube oils (compression) that must be removed to be used for a compressor seal gas service (free of liquids and solids). We have a coalescing filter that is not removing the TEG becuase of the presence of high viscosity lube oil (~200 cST).

Question: what is a typical viscosity range of the separated liquid that you've seen coalescing filter typically operate?? The vendor is not being helpful when asked with this question. I guess because they are unable to remove the liquid we are seeing in their filter.

 

[pennpoint]

RRE
If your seeing it in the filter why do you think your NOT removing it?

pennpoint

 

[RRE]

The coalescing filter has two chambers: an inlet (lower) chamber where free liquid collect and a top (collected coalesced liquid) chamber. We see some liquid in the lower chamber but have not seen any in the top layer. We know we're having TEG come through because we see it in a blowdown valve before it enters the compressor skid. The vendor advises that we are not removing all the liquid (down to 0.1 microns) because the lube oil with its high viscosity is preventing/reducing coalescence.