The natural gas flowing out from the wellhead and the natural gas after wet desulfurization both contain saturated water. Water is prone to freeze at low temperatures and is likely to form natural gas hydrates under high pressure, which can block pipelines and equipment. Therefore, these gases need to be dehydrated before entering the downstream. Different dehydration processes are adopted according to the water content requirements of the downstream equipment. To prevent the formation of hydrates in the natural gas pipeline during transportation, the dehydration depth only needs to be below the hydrate formation temperature. Generally, the water dew point is -5 to -10℃. At this point, the triethylene glycol dehydration process can meet the requirements. The triethylene glycol dehydration process utilizes the absorption capacity of triethylene glycol for water, absorbing the water in the natural gas. The rich glycol after absorption is heated for regeneration to obtain poor glycol that can be reabsorbed. This cycle ensures the continuous operation of the equipment. The main equipment includes absorption towers, regeneration towers, reboilers, pumps, heat exchangers, separators, filters, etc.
