用于泳池水灭菌的光催化组件的数值模拟

Numerical Simulation of the Photocatalytic Components Used for the Pool Water Sterilization

随着经济水平的快速发展,人们对休闲娱乐的环境设施要求不断提高,泳池水环境直接关系着人们的安全健康。因此,需要改善泳池水品质,给人更安全舒适的游泳环境。利用计算流体动力学(computational fluid dynamics,CFD)数值模拟软件,对不同内部结构的光催化组件进行辐射场和流场的数值模拟。模拟结果表明:方案14B(外壳直径200 mm,石英管14根,石英管直径30 mm,内层中心距28 mm,外层中心距76 mm)的辐射通量分布均匀,当入口流量为12 m^(3)/h时,90%以上的速度大于0.1 m/s,达到紊流状态,有利于质量传递,促进光催化反应,提高灭菌效果;端头腔体进出口位置对组件内流体几乎没有影响,可根据现场安装需求来决定其位置;组件内石英管最小基本单元呈正三角形周期分布,且内管圆心间距为52 mm时,辐射场分布较均匀。该研究结果对泳池水灭菌设备的发展提供了技术支持,并为行业发展奠定了基础。

With the rapid development of economic level,people's requirements for environmental facilities for leisure and entertainment are constantly improving.The water environment of swimming pool is directly related to people's safety and health.Therefore,it is necessary to improve the quality of swimming pool water and give people a safer and more comfortable swimming environment.The photocatalytic assembly was numerical simulated with different internal structures using computational fluid dynamics(CFD) numerical simulation software.The simulation results show that the radiation flux of scheme 14B(shell diameter of 200 mm,14 quartz tubes,quartz tube diameter of 30 mm,inner center distance of 28 mm,outer center distance of 76 mm) is evenly distributed.When the inlet flow is 12 m~3/h,more than 90% of the velocity is greater than 0.1 m/s,reaching a turbulent state which is conducive to mass transmission,promotes photocatalytic reaction and improve the sterilization effect.The inlet and outlet position of the end cavity has little effect on the fluid in the component,and its position can be determined according to the site installation requirements.The radiation field is evenly distributed when the minimum basic unit of the quartz tube in the component is positively triangular cycle distribution and the center spacing of the inner tube is 52 mm.The results provide technical support for the development of swimming pool water sterilization equipment and lay the foundation for the development of the industry.