斜发沸石离子交换柱内流体流动特性的研究  

Study on the Fluid Flow Characteristics in Clinoptilolite Ion-Exchange Column

作　　者：张林栋[1] 王军[1] 刘传皓 

机构地区：[1]河北工业大学海洋科学与工程学院海水高效利用化工技术教育部工程研究中心,天津300130

出　　处：《海洋技术》2014年第5期86-90,共5页Ocean Technology

基　　金：天津市应用基础与前沿技术研究计划(重点项目)资助项目(14JCZDJC38900)

摘　　要：通过对斜发沸石离子交换柱内流体在不同流速下,水盐相接触过程中Cl-浓度变化的测定,研究离子交换柱内流体流动对轴向扩散的影响,并建立流体流动数学模型,以期对斜发沸石离子交换柱内流体流动状况的更深入研究奠定一定的基础。实验中以斜发沸石装填离子交换柱,将饱和食盐水分别以不同的流量通入离子交换柱,以一定的时间间隔取样测定Cl-浓度。对柱坐标下质量传递微分方程做适当简化,采用变量置换法进行求解,得到相应的数学模型。经验证计算值与实验值较吻合。Under different flow velocities in the clinoptilolite ion-exchange column, the concentration change of Cl^- in the process of water and salt phase contact was measured to study the influence of fluid flow on axial diffusion in the ion-exchange column and set up a mathematical model for fluid flow, in order to lay a solid foundation for further research on fluid flow conditions in the clinoptilolite ion-exchange column. In the experiment, saturated salt water was pumped into the column which was filled with clinoptilolite from the top to down at the flux of 10 L/min, 20 L/min, 30 L/min and 50 L/min, respectively. The concentration of Cl^- was determined after sampling at a certain time interval. The mathematical model was built by simplifying the mass transfer differential equation in cylindrical coordinates and using variable substitution method to solve the equation. Through verification, it proves that the calculated values coincide with the experimental values.

关 键 词：斜发沸石 离子交换柱 数学模型 轴向扩散 

分 类 号：P734[天文地球—海洋化学]