| 结垢对电吸附除盐的影响及其控制 |
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| 引用本文： | 赵雪娜,倪文,陈兆林.结垢对电吸附除盐的影响及其控制[J].过程工程学报,2008,8(5):887-891. |
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| 作者姓名： | 赵雪娜 倪文 陈兆林 |
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| 作者单位： | 北京科技大学金属矿山高效开采与安全教育部重点实验室,北京,100083 |
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| 摘 要： | 利用电吸附技术对含有高重碳酸盐(HCO3-)和不同浓度Ca2+的原水进行除盐处理，研究了结垢对电吸附除盐的影响. 实验分别在Ca2+浓度为40, 144和350 mg/L三种工况下进行，结果表明，当Ca2+浓度较高时，除盐率明显下降. 对离子去除率、离子脱附率和起始工作电流的变化进行了分析，认为Ca2+与HCO3-相互作用在电吸附模块内部形成碳酸钙垢体，导致电极的双电层电容量降低，从而影响电吸附的除盐效果. 利用酸化吹脱预处理将原水中HCO3-浓度控制在100 mg/L，可使碳酸钙垢体溶解，改善模块的除盐性能. 根据HCO3-积存和工作出水pH值的变化，探讨了碳酸钙在模块内部的结晶与溶解机理.
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| 关 键 词： | 电吸附 结垢 酸化吹脱 除盐 |
| 收稿时间： | 2008-5-16 |
| 修稿时间： | 2008-6-16 |
Effect of Scaling on Electrosorption Desalination and Its Control |
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| ZHAO Xue-na,NI Wen,CHEN Zhao-lin.Effect of Scaling on Electrosorption Desalination and Its Control[J].Chinese Journal of Process Engineering,2008,8(5):887-891. |
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| Authors: | ZHAO Xue-na NI Wen CHEN Zhao-lin |
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| Affiliation: | ZHAO Xue-na,NI Wen,CHEN Zhao-lin (State Key Lab. High-efficient Mining & Safety of Metal Mines,Min. Edu.,Univ. Sci. Technol. Beijing,Beijing 100083,China) |
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| Abstract: | The effect of scaling on electrosorption desalination was studied by using electrosorption technology to desalt feed water containing different concentrations of Ca2+ and high concentration bicarbonate (HCO3-). The experiments were carried out at three Ca2+ concentrations of 40, 144 and 350 mg/L, respectively. The results show that the desalination efficiency drops remarkably at higher Ca2+ concentrations. Analysis of changes of ion removal rate, ion desorption rate and initial working current reveals that ... |
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| Keywords: | electrosorption scaling acidification-stripping desalination |
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