Wet natural gas in saturated state is separated by the filter separator to separate the liquid drops of 5 μ m and above, and then enters the gas-liquid separation chamber at the lower part of TEG (Triethylene gly)absorption tower of dehydration unit to separate the free liquid that may be brought into the absorption tower when the filter separator is in accident state.Enter the absorption section through the riser of absorption tower.The regenerated TEG is pumped into the top of the absorption tower to fully contact with the natural gas from the bottom up on the absorption tower for mass transfer and moisture removal.The dehydrated natural gas is discharged from the tower after removing more than 5 μ m glycol droplets through the tower top mist catcher. After leaving the tower, the heat is exchanged with the hot lean glycol before entering the tower through the tubular heat exchanger to reduce the temperature of the TEG entering the tower.After heat exchange, the natural gas enters the filter separator to separate out the carrying glycol and then enters the export pipeline.The rich TEG , which absorbs the moisture in natural gas, flows out of the absorption tower and enters the liquid level control valve. After depressurization, it enters the reflux cooling plate on the top of the rich liquid distillation column to exchange heat with the hot steam generated in the reboiler. After providing the reflux cooling capacity of the column top, the rich TEG is heated to about 50 ℃. The outlet tube enters the TEG flash tank.Rich glycol is depressurized to 0.4MPa ~ 0.6MPa in flash tank. Hydrocarbon gas and other gases dissolved in TEG are flashed out, and these gases are used as fuel gas for reboiler combustion. After flashing, the rich liquid TEG enters the mechanical filter to filter out the mechanical impurities, and then goes into the activated carbon filter to further absorb the hydrocarbon substances dissolved in TEG and the degradation substances of TEG. Then it enters the plate type rich and poor liquid heat exchanger to exchange heat with the high temperature lean TEG from the lower heat exchange buffer tank of the TEG reboiler. The heat exchange temperature rises to 120 ~ 130 ℃ and enters the rich liquid distillation column. In the TEG reboiler at the bottom of the distillation column, TEG is heated to 193 ℃, and the water in the TEG is fractionated and discharged from the top of the distillation column. The concentration of about 99% (WT) of lean glycol is overflowed into the lower TEG heat exchange buffer tank by the lean liquid stripping column in the reboiler. Under the action of dry gas in the lean liquid stripping column, the concentration of lean glycol entering the heat exchange buffer tank can reach 99.5% ~ 99.8%. In the glycol buffer tank, the lean glycol with a temperature of about 193 ℃ enters the rich and poor glycol heat exchanger to exchange heat with the rich glycol. When the temperature drops to about 100 ℃, it enters the pump.The lean liquid TEG is pumped into the external gas-liquid heat exchanger of the absorption tower by pump. After cooling with the gas heat exchanger out of the tower, it enters the top of the absorption tower from the upper part of the casing pipe to complete the solvent circulation. A stream of dry gas is led out from the dry gas section at the outlet of absorption tower, and enters the dry gas heating pipe of heat exchange buffer tank at the lower part of TEG reboiler. After being heated by lean TEG, it is throttled to 0.4MPa by self operated pressure regulating valve and then enters into fuel gas buffer tank.After leaving the fuel gas buffer tank, it is divided into two routes, one of which is heated and enters the lower part of lean liquid stripping column as lean liquid stripping gas, and the other as fuel gas of reboiler.This is the a  process for natural gas removing water.