本文剖析了乙二醇生产环节的废液—多醇贫液及其蒸馏馏分的主要化学物质，确定了引起馏分味浓、色重和电导率高的原因。经工艺筛选，聚酰胺纳滤膜在1.5MPa下流速45L/m2.h将混合液完全脱色。活性炭吸附柱以0.5L/m2.h可脱除体系N、S化合物。聚酰胺反渗透膜在1.8MPa下流速35L/m2.h可将低粘度液体电导率降低至20µS/cm；经酸、碱凝胶离子交换柱可将高粘度液体电导率降至10µS/cm。根据产品性质和工厂实际情况设计了用于乙二醇-水混合液精制的膜集成技术工艺路线。

The ingredients of blending waste liquid of ethylene glycol/water were analyzed, which came from ethylene glycol commercial manufactory company. The main reason had been identified which cause heavy smell, dark color and high conductivity for. Under 1.5MPa pressure, concentrate glycol liquids were filtrated by polyamide nanofiltration membrane in velocity of 45L/m2.h to be bleached. Volatile small organic molecules were deodorized by active carbon filled column under 0.5L/m2.h. Organic electrolytes dissolving in glycol-water mixtures were removed by reverse osmosis for low viscosity liquid with the speed of 35L/m2.h under 1.8MPa and ion exchange resin columns for high viscosity liquid. The process conditions and factors of each unit were also investigated and discuss, and the operation route was designed for whole purification process according to the actual situation of the nature of products and factory integration technology.

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