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Title: Trouble Shooting Triethylene Glycol Dehydrators
Author: Ted Klima
Source: 1987 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1987
Abstract: The dehydration of natural gas with glycol is accomplished by contacting the gas with concentrated glycol (usually triethylene glycol with less than 1 % water). The water vapor in the gas is absorbed by the glycol, diluting the glycol. The diluted glycol then flows to the reboller where it Is reconcentrated to the original concentration. A schematic of a typical glycol type gas dehydration unit with siK bubble cap trays, an integral inlet scrubber and a glycol balanced pump Is shown in FIG. 1. This schematic includes a flash (Pump Gas Separator) which is in many cases an optional item. Wet gas enters the scrubber section through the wet gas inlet nozzle. In this section, entrained liquids are separated from the gas and are removed from the system by the action of the liquid level controller on the distillate dump valve. The gas flows upward through the mist extractor and hat tray into the contactor section of the vessel. As the gas flows upward from tray to tray it is brought Into contact with the glycol on each tray. The glycol absorbs the water vapor from the gas and the dry gas passes upward through the mist extractor and through the glycol to gas heat exchanger to the dry gas outlet nozzle.

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