摘要：

针对环氧树脂精制废水存在排放量大，盐含量高，三效蒸发能耗高、操作困难等问题，开展了高盐废水（盐质量分数20.00%、甘油质量分数0.40%）的“溶剂法绿色脱盐-洗涤环氧树脂”循环应用研究。实验结果表明，在m（脱盐剂）∶m（盐水）=2.34、脱盐温度为20 ℃、磁力搅拌速率200 r/min、搅拌时间和沉降分离时间均为2 min的条件下，采用溶剂法对高盐废水进行绿色脱盐，脱盐率达到45.66%；在蒸馏温度为80~90 ℃、蒸馏时间为60 min下回收脱盐剂，回收的脱盐剂脱盐效果与新鲜脱盐剂脱盐效果相当；在85 ℃、盐水与树脂质量比约为12∶13条件下用盐质量分数为12%的盐水洗涤粗树脂，经历38次“绿色脱盐-洗涤环氧树脂”循环后精制树脂中Cl^-质量分数≤50 μg/g，满足《双酚-A型环氧树脂》（GB/T 13657—2011）对优等品环氧树脂Cl^-质量分数的要求。与现有环氧树脂精制工艺相比较，该工艺盐水排放量减少98.55%，取缔了三效蒸发操作，蒸汽消耗下降了66.67%。

关键词: 环氧树脂, 高含盐废水, 绿色脱盐, 循环洗涤

Abstract:

In view of the problems such as large discharge，high salt content，high energy consumption and difficult operation of three-effect evaporation of epoxy resin refining wastewater，the recycling application of “solvent green desaline-washing epoxy resin” in high-salt wastewater （salt mass fraction 20.00%，glycerol mass fraction 0.40%） was carried out. The experimental results showed that under the conditions that m（desalting agent）∶m（brine）=2.34，desalting temperature was 20 ℃，magnetic stirring rate was 200 r/min，stirring time and settling separating time were both 2 min，the desalting rate of green desalting by solvent method reached 45.66%. The desalting agent was recovered at distillation temperature of 80-90 ℃ and distillation time of 60 min. The desalting effect of recycled desalting agent was equivalent to that of fresh desalting agent. Wash the crude resin with salt water with a mass fraction of 12% at 85 ℃ and a mass ratio of salt water to resin of 12∶13，after 38 cycles of “green desalination-washing epoxy resin”，Cl^- mass fraction ≤50 μg/g. It met the requirements of Bisphenol-A Epoxy Resin（GB/T 13657—2011） for the inorganic chlorine content of excellent epoxy resin. Compared with the existing epoxy resin wastewater treatment process，the saltwater discharge was reduced by 98.55%，the three-effect evaporation operation was banned，and the steam consumption was reduced by 66.67%.

Key words: epoxy resin, high salinity wastewater, green desalting, cycle washing

中图分类号: 

• X703.1