Application Exploration of Vacuum Dehydration Technology in Ethylene Glycol Regeneration System
The water content of ethylene glycol is one of the important indicators to measure the level of ethylene glycol regeneration and recovery technology.With the acceleration of exploration and development of marine natural gas,the method of ethylene glycol regeneration has also shifted from atmospheric pressure dehydration to more energy-efficient vacuum dehydration.The ethylene glycol regeneration and recovery system configured on a certain deepwater natural gas extraction platform is taken as the research object.In response to a series of problems that occur during the ethylene glycol dehydration process,such as insufficient heat supply to the reboiler,scaling in the reboiler,and high seawater outlet temperature,a vacuum dehydration technology application and transformation plan is proposed.The stiffness and instability of the main equipment of the dehydration unit are checked.The on-site trial operation results after the renovation implementation indicate that vacuum dehydration technology has important application value and significant energy-saving effect in the dehydration unit of ethylene glycol regeneration and recovery system.It is expected to save energy up to 1 267.47 tce/a,which is a beneficial exploration for the improvement of ethylene glycol regeneration and recovery technology.
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