利用常规甘醇脱水工艺，通过重沸器负荷、甘醇损失、BTEX排放量对3种甘醇的性能进行分析比较后得出，当甘醇循环量达到4 m³/h时，DEG、EG溶剂脱水重沸器负荷较低，BTEX排放量降低90%以上，但甘醇损失量较大，可通过对其进行回收利用以降低甘醇损失。最后得出，当天然气富含BTEX时，可通过使用DEG、EG替代TEG，解决再生气BTEX排放量超标的问题。

By means of conventional glycol dehydration process,the performances of three kinds of glycols (diethylene glycol,monoethylene glycol and triethylene glycol,i.e.DEG,MEG and TEG) are analyzed and compared through evaluating the reboiler load,the loss of glycol and the emission of benzene,toluene,ethylbenzene and xylenes (BTEX).It is found that the loads of dehydration reboiler for DEG and EG are low,the BTEX emission is reduced by more than 90% but the loss amount of glycol is large when the glycol circulation reaches 4 m³·h^-1.The loss of glycol can be reduced by recycling glycol.Finally,it is concluded that TEG can be replaced by DEG and EG to solve the problem of excessive emission of BTEX in the regenerated gas when natural gas contains high contents of BTEX.