Abstract: The theoretical loss value of the triethylene glycol （TEG） dehydration system in a certain gas field is that for every 1×10⁶ standard cubic meters of natural gas processed （0 ℃ and 101.325 kPa）,the TEG loss is less than 13.4 liters. To reduce TEG loss,a series of energy-saving and consumption-reducing measures were implemented in 2024,including lowering the operating temperature of the reboiler,reducing the TEG circulation rate,retrofitting the reflux condenser return valve,modifying the TEG filling port,purging the residual TEG in pipelines with nitrogen,replacing the plunger of the TEG circulation pump,and improving the venting process during the replacement of the particle filter element. Practice has shown that the adoption of the above measures has effectively achieved the goal of reducing TEG consumption：the TEG loss has decreased from 15.57 L/10⁶ m³ in 2023 to 13.65 L/10⁶ m³ in 2024,which is close to the designed value of 13.4 L/10⁶ m³,resulting in a cost saving of approximately CNY 81,000.

Key words: triethylene glycol, dehydration, loss