双疏膜膜蒸馏处理含有机溶剂废水的研究  

Application study of amphiphobic membrane based membrane distillation in treatment of wastewater containing organic solvent

作　　者：解保雷 史志伟 高永钢 XIE Baolei;SHI Zhiwei;GAO Yonggang(Beijing China Science Resources and Environmental Technology Co.Ltd.,Beijing 102400,China)

机构地区：[1]北京中科瑞升资源环境技术有限公司,北京102400

出　　处：《膜科学与技术》2024年第1期130-136,共7页Membrane Science and Technology

摘　　要：采用内置双疏膜的真空膜蒸馏工艺处理N-甲基吗啉-N-氧化物(NMMO)溶液、乙醇溶液、喷漆废水和气田采出水四种含有机溶剂的水溶液,考察双疏膜处理含有机溶剂废水的可行性.实验结果表明,双疏膜可用于NMMO溶液和气田采出水的浓缩.实验过程中,NMMO溶液质量分数由25.0%提高到46.0%,截留率高于99.9%;浓缩后的气田采出水COD高于15 000 mg/L,盐和有机物的截留率分别为99.8%和95%.19%乙醇溶液的产水中乙醇质量分数最高可达28.1%,始终高于浓水中的乙醇浓度,因此由于乙醇具有高挥发性,无法对其溶液进行浓缩;工业喷漆废水中有机溶剂2-丁氧基乙醇具有很强的表面活性剂功能,导致双疏膜被迅速浸润.本研究为双疏膜用于膜蒸馏技术浓缩有机溶剂废水提供了方向指导和实验支撑.A feasibility study was conducted to employ amphiphobic membrane built-in vacuum membrane distillation process to treat wastewater containing organic solvent,including N-methylmorpholine-N-oxide(NMMO)solution,ethanol solution,painting wastewater and gas field produced wastewater.The experimental results show that the amphiphobic membrane is applicable to concentrate NMMO solution and gas field produced wastewater.During the experiment,the concentration of NMMO solution is increased from 25.0%to 46.0%,and the rejection is higher than 99.9%;the COD of the gas field produced wastewater after concentration is higher than 15000 mg/L,and the rejection of salt and organic matter is higher than 99.8%and 95%,respectively.For 19% ethanol solution,the maximum concentration of ethanol in the permeate is 28.0%,higher than that in concentrate,thus the ethanol solution cannot be concentrated because of the high volatility of ethanol.For industrial painting wastewater,the amphiphobic membrane is quickly wetted due to the strong surfactant function of organic solvent 2-butoxyethanol.This study provides directional and experimental support for the concentration of wastewater containing organic solvent by amphiphobic membrane built-in vacuum membrane distillation process.

关 键 词：真空膜蒸馏 有机溶剂 浓缩分离 双疏膜 

分 类 号：TQ028[化学工程]