天然气处理接收平台配置有1套乙二醇回收装置，用于对水下返回的富乙二醇进行回收处理。该装置由脱水、脱盐、闪蒸等4个单元组成，其中重沸器为脱水单元的关键设备。运行期间重沸器A、B相继发生内漏，使得脱水单元停用，无法生产合格的乙二醇，直接导致水下气田停产。在研究乙二醇再生系统各单元工作原理的基础上，提出了一系列的工艺流程创新改造方案，保证了重沸器故障期间连续生产出合格的乙二醇。

The natural gas processing and receiving platform is equipped with a set of ethylene glycol recovery facility,which is employed for the recovery and treatment of ethylene glycol-rich returned underwater.This facility consists of dehydration,desalination and flash evaporation units.Reboiler is the key equipment of the dehydration unit.During operation,A and B reboilers suffered internal leakage one after another,making the dehydration unit shut down and in turn being unable to produce qualified glycol,which directly led to the shutdown of underwater gas field.On the basis of studying the working principle of each unit of ethylene glycol recovery facility,a series of innovation and renovation schemes are put forward,which ensures continuous production of qualified ethylene glycol when the reboiler is failure.