The importance of current distribution and cell hydrodynamic analysis for the design of electrocoagulation reactors
The importance of current distribution and cell hydrodynamic analysis for the design of electrocoagulation reactors
复制标题
DOI：
10.1002/jctb.4105
复制
发表时间：
2014-02
影响因子：
3.4
通讯作者：
Armando Vázquez;J. Nava;R. Cruz;I. Lázaro;I. Rodríguez
中科院分区：
文献类型：
--
作者：
Armando Vázquez;J. Nava;R. Cruz;I. Lázaro;I. Rodríguez
背景：研究了电流分布和电池流体动力学对电凝（EC）反应器性能的影响。该分析仅考虑了一次电位和电流密度的分布。使用湍流模型 (k-e) 通过计算流体动力学 (CFD) 分析流体动力学行为。在这项研究中，仅考虑电极之间的流体运动。结果：电流分布分析显示了电池几何形状和电极配置对阳极电位和电流分布的影响。放置在电极边缘的绝缘体对电势值产生边界效应，有利于二次反应并减少铝凝块的形成。 CFD 分析表明，电池几何排列在电极之间产生低速度分布。从实验评估中可以看出，当在低流速曲线下实现均匀的电位和电流密度时，EC 性能得到改善。结论：水动力行为分析表明不同水动力现象对凝块形成和形成污泥去除的影响。同样，在优化能耗方面，电流分布分析是评估电极排列和电池几何形状的非常有用的工具。 c�2013年化学工业学会
BACKGROUND: The effects of current distribution and cell hydrodynamics on the performance of an electrocoagulation (EC) reactor were studied. This analysis only considered the distributions of primary potential and current density. The hydrodynamic behavior was analyzed by means of computational fluid dynamics (CFD) using a turbulent model (k–e). For this study, only the fluid movement between electrodes was taken into account. RESULTS: The analysis of current distribution showed the effects of cell geometry and electrode configuration on both the potential and current distributions on the anodes. Insulators placed at the edges of the electrodes produced border effects on the potential values that favored a secondary reaction and diminished the formation of aluminum clots. The CFD analysis indicated that the cell geometry arrangement generates low velocity profiles between the electrodes. From the experimental evaluation, it was observed that EC performance was improved when uniform potential and current densities were achieved with low flow velocity profiles. CONCLUSIONS: Analysis of the hydrodynamic behavior showed the impact of different hydrodynamic phenomena on both the formation of clots and the removal of the sludge formed. Likewise, it was confirmed that in optimizing energy consumption, an analysis of current distribution is a very useful tool for evaluating the arrangement of electrodes and the cell geometry. c � 2013 Society of Chemical Industry