EDI模块的化学污染特性及其清洗研究  

Research on Characteristics of Chemical Fouling of EDI Module and Its Cleaning

作　　者：田甜[1] 李福勤[1] 姚利军[2] 杨久坡[1] 何绪文[3] 

机构地区：[1]河北工程大学城市建设学院,河北邯郸056038 [2]煤炭科学研究总院后勤服务中心,北京100013 [3]中国矿业大学化学与环境学院,北京100083

出　　处：《中国给水排水》2008年第19期67-69,73,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(50678172);河北省教育厅科研计划项目(2005110)

摘　　要：从出水水质和运行参数控制两方面,对EDI模块受化学污染情况进行了试验研究。结果表明,根据产水电导率的变化可判断出EDI模块的结垢初始点,且化学污染主要发生在阳离子树脂上;为有效控制化学污染,应选择适当的进水流量和操作电流(以产水电导率<0.2μS/cm为控制指标,该试验装置的最佳流量和电流分别为162 L/h和2 A)。另外,通过正交试验确定了EDI模块的最优清洗方案,即用2%的HCl清洗30 min,并浸泡2 h。The experimental study on chemical fouling of EDI module was performed in terms of effluent quality and operation parameters control. The results show that the initial scaling point of EDI module can be determined by the variation of conductivity in water production. The chemical fouling occurs mainly on cation resin. The appropriate influx rate and electric current should be selected to control chemical fouling effectively. When the conductivity in water production is less than 0.2 μS/cm, the optimal influx rate and electric current are 162 L/h and 2 A, respectively. Furthermore, the optimal cleaning scheme of polluted EDI module is determined by orthogonal experiment, which is soaking for 2 h and cleaning for 30 rain by 2% HC1.

关 键 词：EDI模块 化学污染 清洗方案 

分 类 号：TU991.2[建筑科学—市政工程]