Gas Spec Issues(TEG)

If the water content of the gas leaving the TEG dehydration process exceeds sales specifications, the following areas should be investigated:

• insufficient TEG regeneration:

-insufficient stripping steam/reboiler heat input?

-incorrect TEG recovery from TEG drain tank—too much water-laden TEG pumped to TEG reboiler?

-incorrect TEG stripping column pressure?

-contaminated or degraded TEG?

-plugged TEG stripping column packing?

-too low a TEG flow through TEG stripping column?

-insufficient stripping (fuel) gas admitted to the small supplementary stripper?

• insufficient TEG circulation rate:

-TEG pump speed too low?

-TEG pump bypass lines open or passing pump bypass valves?

-low level in TEG accumulator?

• different operating conditions:

-lean TEG entering contactor too hot?

-too high a gas flow through contactor?

-higher water content in the incoming gas?

-low TEG contactor pressure?