化工进展

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EDI用于处理含甲酸废水

张敏卿1,叶丽莉2   

  1. 1天津大学化工学院,天津 300072;2河北工业大学化工学院,天津 300130
  • 出版日期:2013-04-05 发布日期:2013-04-05

Formic acid wastewater treatment by electrodeionization technology

ZHANG Minqing1,YE Lily2   

  1. 1School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;2School of Chemical Engineering and Technology,Hebei University of Industry,Tianjin 300130,China
  • Online:2013-04-05 Published:2013-04-05

摘要: 在工业生产过程中,排放的废水里含有大量的甲酸。本文以含甲酸废水处理为研究对象,采用自主设计的一级一段电去离子膜堆装置,通过考察I-U、pH-U等特征曲线,研究了离子交换膜、离子交换树脂及树脂填充比例、流速等操作条件对膜堆性能的影响。结果表明:采用异相膜和凝胶型树脂、淡室填充100%阴树脂、淡水流速为2.5 L/h的操作条件,可使EDI膜堆效果最佳;不同甲酸浓度对能耗的影响比较小,淡室浓度变化情况基本相同;当淡室甲酸质量分数为1.00%时,EDI膜堆可获得较高的电流并具有较低的耗电量。总结认为该研究结果可为EDI处理甲酸废水工业装置提供设计依据。

关键词: 甲酸, 电去离子, 特征曲线

Abstract: There is plenty of formic acid existing in wastewater discharged from industrial production. One flow passage system of electrodeionization was designed for formic acid waste-water treatment. According to “I-U” and “pH-U” characteristic curves,the influences of the ion exchange membrane types,the ion exchange resin types,the ratio of resins,the flow rates and the operational parameters on separation performance were investigated. The results show that the optimal performance could be achieved when the EDI stack consisted of heterogeneous membrane,100% gel-type anion resin filled in dilute compartment and the flow rate of dilute stream was 2.5 L/h. The concentration of formic acid has less impact on energy consumption and the change of dilute compartment solution concentration was basically the same. When the concentration of formic acid in dilute compartment was 1.00%,EDI stack could achieve higher current and lower power consumption. The study results can guide the industrial electrodeionization design for formic acid wastewater treatment.

Key words: formic acid, electrodeionization(EDI), characteristic curve

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