TEG Dehydration Units:
Tri-Ethylene Glycol (TEG) dehydration units are used by most natural gas producers use to remove water from the natural gas stream to meet the pipeline quality standards. This process is required to prevent hydrates formation at low temperatures or corrosion problems due to the presence of carbon dioxide or hydrogen sulfide commonly found in natural gas.
Wet gas is brought into contact with dry glycol in an absorber. As the water vapor is absorbed in the glycol its dew point reduces. The wet rich glycol then flows from the absorber to a regeneration system in which the entrained gas is separated and fractionated in a column and reboiler. The heating allows boiling off the absorbed water vapor and the water dry lean glycol is cooled via heat exchangers and pumped back to the absorber.
General practice is to use TEG units downstream of an amine plant, storage, compression and/or gas processing facilities. Cutter USA TEG dehydration units are modular for simple installation and mobility.