高盐废水绿色脱盐用于洗涤环氧树脂的实验研究  

Experimental study on green desalination of high salt wastewater for ishing of epoxy resin

作　　者：唐晓东[1] 张琳玉 李晶晶[1] 冯雪峰 曹晔飞 高志强 TANG Xiaodong;ZHANG Linyu;LI Jingjing;FENG Xuefeng;CAO Yefei;GAO Zhiqiang(College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China;Nantong Xingchen Synthetic Material Co.,Ltd.,Nantong 226017,China)

机构地区：[1]西南石油大学化学化工学院,四川成都610500 [2]南通星辰合成材料有限公司,江苏南通226017

出　　处：《工业水处理》2023年第11期189-194,共6页Industrial Water Treatment

基　　金：中国蓝星南通星辰合成材料有限公司项目(NTXC202110RD0001)。

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≤50μg/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%。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≤50μg/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%.

关 键 词：环氧树脂 高含盐废水 绿色脱盐 循环洗涤 

分 类 号：X703.1[环境科学与工程—环境工程]