静电场对CaCO_3结晶过程的影响及与绿色阻垢剂的协同阻垢性能  

Influence of electrostatic water treatment on crystallization behavior of CaCO_3 and synergistic scale inhibition with a green scale inhibitor

作　　者：李海花[1] 刘振法[1] 高玉华[1] 张利辉[1] 李晓辉[1] 

机构地区：[1]河北省科学院能源研究所,河北省工业节水工程技术研究中心,河北石家庄050081

出　　处：《化工学报》2013年第5期1736-1742,共7页CIESC Journal

基　　金：河北省自然科学基金项目(B2010001558,B2011302001)~~

摘　　要：使用非蒸发浓缩法研究了静电场对碳酸钙结晶过程及晶型的影响。研究发现经静电处理后,碳酸钙结晶过程初期晶体生长速度缓慢,存在一个稳定期,这个稳定期的长短受温度影响很大。60℃时稳定期可达3h,当温度升高到80℃后,稳定期缩短到0.5h内。SEM和IR分析结果表明,经静电处理后,水垢中文石型碳酸钙的含量增加。晶体稳定期和文石型碳酸钙的出现主要是因为,高压静电场导致水分子和HCO3-极化变形,使得二者的极性增加,反应活性增强。静态阻垢实验和动态阻垢实验结果表明,静电水处理和聚环氧琥珀酸(PESA)之间存在明显的协同阻垢效应。PESA在静电水中的静态阻垢率可达95.8%,比在配制水中的提高了18.9%;动态阻垢率为92.1%,阻垢率提高了14.5%。The influences of electrostatic water treatment on crystallization behavior and crystal forms of CaCO3 were investigated by using non-evaporation method.A stable stage existed in the early stage of the CaCO3 crystallization in the water sample treated by electrostatic field,and the length of the stage was affected remarkably by temperature.For instance,the stage lasted 3 h at 60℃,but less than 0.5 h at 80℃.The results of SEM and IR show that the content of aragonite increases in the scale sample formed in the electrostatic water.The appearance of the stable stage and aragonite is because H2O molecules and HCO-3 are polarized by electrostatic field and their reactivity increases.The results of the static and dynamic scale inhibition experiments prove obvious synergistic scale inhibition effect between the electrostatic water treatment and polyepoxysuccinic acid（PESA）.With PESA in the electrostatic water,the static scale inhibition rate reaches 95.8%,which is 18.9% higher than that in the prepared water,and the dynamic scale inhibition rate is 92.1%,which is 14.5% higher than that in the groundwater.

关 键 词：静电水处理 聚环氧琥珀酸 协同阻垢效应 阻垢机理 

分 类 号：TQ085.4[化学工程]