化工进展

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反渗透膜处理含有机酸凝结水技术

李 静1,2,刘景洋1,乔 琦1,海热提2,孙晓明1   

  1. 1中国环境科学研究院国家环境保护生态工业重点实验室,北京 100012;2北京化工大学化学工程学院,北京 100029
  • 出版日期:2012-12-05 发布日期:2012-12-05

Research on reverse osmosis membrane treatment technology of condensate water containing organic acid

LI Jing1,2,LIU Jingyang1,QIAO Qi1,HAIRET2,SUN Xiaoming1   

  1. 1 Ministry of Environmental Protection Key Laboratory of Eco-Industry,Chinese Research Academy of Environment Sciences,Beijing 100012,China;2 School of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China
  • Online:2012-12-05 Published:2012-12-05

摘要: 采用反渗透膜对某制药厂含甲酸、乙酸、丙酸、丁酸、戊酸、己酸、异丁酸和2-甲基丁酸的凝结水进行处理,研究了进水温度、压力和pH值对凝结水中有机酸截留效果的影响,讨论了反渗透膜对有机酸的截留机理。研究结果表明:温度为20~40 ℃、压力为0.5~1.5 MPa、pH值为4~10时,产水中丁酸、戊酸、己酸和2-甲基丁酸的浓度低于检测限,甲酸、乙酸、丙酸和异丁酸的截留率随着压力和pH值增加而增大,随着温度升高而降低;产水率随着压力增大、温度升高而增大,不受pH值变化影响。说明反渗透膜对有机酸的机械筛除作用及膜与有机酸之间的电荷作用对有机酸的截留具有重要影响。

关键词: 反渗透膜, 有机酸, 凝结水, 截留率

Abstract: This research focused on the application of reverse osmosis membrane to treat the condensate water containing formic acid,acetic acid,propionic acid,butyric acid,pentanoic acid,carproic acid,isobutyric acid and 2-methyl-butyric acid. The effects of water temperature,pressure and pH on retention rate of organic acids,as well as the retention mechanism were discussed. The results indicated the concentration of butyric acid,pentanoic acid and 2-methyl-butyric acid in producing water were below detection limit when the experimental conditions of water temperature at 20— 40 ℃,pressure at 0.5—1.5 MPa,pH at 4—10. The retention rate of formic acid,acetic acid,propionic acid and carproic acid decreased with the increase of water temperature and increased with the increase of pressure and pH. The water production rate increased when both water temperature and pressure increased. The mechanic screening of reverse osmosis membrane and the charge effect between organic acid and membrane should have important influences on the retention effect of organic acids.

Key words: reverse osmosis membrane, organic acid, condensate water, retention rate

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