Glycol dehydration

[1] Glycol dehydration units depress the hydrate formation point of the gas through water removal.

The glycol removes water from the natural gas by physical absorption and is carried out the bottom of the column.

Due to the composition of the rich glycol, a vapor phase having a high hydrocarbon content will form when the pressure is lowered.

After leaving the flash vessel, the rich glycol is heated in a cross-exchanger and fed to the stripper (also known as a regenerator).

furthermore looking at other general uses, glycol is a chemical commonly used in many commercial and industrial applications including antifreeze and coolant.

This trim cooler can either be a cross-exchanger with the dry gas leaving the absorber or an air-cooled exchanger.

Common enhanced methods include the use of stripping gas, the use of a vacuum system (lowering the entire stripper pressure), the DRIZO process, which is similar to the use of stripping gas but uses a recoverable hydrocarbon solvent, and the Coldfinger process where the vapors in the reboiler are partially condensed and drawn out separately from the bulk liquid.