Glycol dehydration has proven to be the most common and economical means of water removal from gas streams. Glycols typically seen in industry include triethylene glycol (TEG), diethylene glycol (DEG), ethylene glycol (MEG), and tetraethylene glycol (TREG). TEG is the most commonly used glycol in industry.
Glycol dehydration units remove water vapor from gas streams to allow further treatment and transportation without risk of hydrate formation or corrosion in the presence of H2S or CO2 by using ethylene glycol as a liquid dessicant.
Through this process, wet gas contacts dry glycol which absorbs the water from the gas. The wet gas and dry glycol are mixed in towers. After the dry glycol becomes water-rich, it leaves the tower and goes to a reconcentration system.
In the reconcentration system, the water-rich glycol is filtered and heated to 400°F. The water escapes as steam and the purified glycol returns to the tower where it is put in contact with the wet gas again.
Glycol dehydration units remove water vapor from gas streams to allow further treatment and transportation without risk of hydrate formation or corrosion in the presence of H2S or CO2 by using ethylene glycol as a liquid dessicant.
Through this process, wet gas contacts dry glycol which absorbs the water from the gas. The wet gas and dry glycol are mixed in towers. After the dry glycol becomes water-rich, it leaves the tower and goes to a reconcentration system.
In the reconcentration system, the water-rich glycol is filtered and heated to 400°F. The water escapes as steam and the purified glycol returns to the tower where it is put in contact with the wet gas again.