Dehydration Units remove water vapor from natural gas streams utilizing a hygroscopic adsorbent, such as triethylene glycol (TEG). The process is continuous, eliminating the need for desiccant replacement (as with deliquescent salts).  The TEG is regenerated by heating it in a vessel and driving off the adsorbed water vapor.  Units consist of a contact tower (where the natural gas interfaces with the TEG), a regeneration unit (to boil off adsorbed water vapor) and the necessary pumps, piping, instrumentation and controls.