三维和二维电极反应器传质系数比较研究

为深入研究三维电极反应器处理污染物效果优于二维电极反应器的电化学作用机理,本文以传质系数为指标,定量对比研究了三维和二维电极反应器的传质能力,并通过正交和单因素实验考察影响传质系数的主要因素,且采用量纲分析法分析了本文的电化学模型。研究结果表明:泡沫铜和活性炭双填料三维电极反应器在同等条件下的传质系数均高于二维电极反应器;影响传质系数的主要因素为温度,其次为维度,影响相对较小的是流量,且温度越高、流量越大,传质系数也越大,体系的传质能力越强;舍伍德数的实验值和理论值误差在0~14.65%之间,理论模型和实验数据达到了较好的吻合。

Comparison of mass-transfer coefficients between two-dimensional and three-dimensional electrode reactor

Order to study the effect mechanism of three-dimensional electrochemical reactor is better than that of two- dimensional electrochemical one in contaminant treatment,the paper quentitatively studied the transfer ability of three-dimensional electrochemical reactor and two-dimensional electrochemical one by taking mass-transfer coefficient as index.It also investigated the main influential factors that affect mass-transfer coefficient by orthogonal experiment and single factor experiment,and analyzed the electrochemical model by use of dimensional analysis. The results show that mass-transfer coefficient of three-dimensional electrode reactor filled with foamy copper and activated carbon is always higher than that of two-dimensional electrode reactor in the same condition. Temperature is the main influencial factor to mass-transfer coefficient, dimension is the next and then is flow. Higher temperature.The higher the temperature,the more the flow rate and mass-transfer coefficient,and the strong the mass-transfer ability of the system. The error between the experimental value of Sherwood and that of theory is 0~14.65%,which achieves good agreement.