Gas dehydration packages with liquid media technology (TEG-DEG-MEG)
Description
Gas dehydration packages with liquid media technology (TEG-DEG-MEG) is the process used by Pietro Fiorentini to remove water from natural gas and from its liquids (NGLs). It is required to prevent formation of hydrates and condensation of free water in processing and transportation facilities, meet a water content specification, and finally prevent corrosion. Liquid desiccant dehydration equipment is simple to operate and maintain. It can easily be automated for unattended operation, e.g., glycol dehydration at a remote production facility. Triethylene Glycol (TEG), Diethylene Glycol (DEG) and Monoethylene Glycol (MEG) are used as liquid desiccants, but TEG is the most common for natural gas dehydration because of its stability and because its choice minimizes glycol losses.
Liquid desiccants can be used also for sour gases, but additional precautions in the design are needed due to the solubility of the acid gases in the desiccant solution. The dry outlet gas specification obtained in TEG dehydration units is in the range of 3 to 7 lb water/MMSCF gas.
