旋流-紫外压载水处理系统的优化设计和仿真的分析.pdfVIP

旋流—紫外压载水处理系统的优化设计与仿真研究 陈 宁 ，孟 梦，包国治 （江苏科技大学能源与动力工程学院，江苏镇江 212003 ） 摘要:结合当前船舶压载水处理技术，本文采用旋流—紫外技术处理船舶压载水，即旋流净化作为一级预处理，分 离泥沙等密度较大的固体颗粒；紫外线作为二级处理，灭活残余的微生物和细菌。分别对水力旋流器和UV 处理 装置进行了优化设计，将旋流器入口结构优化为阿基米德螺线形入口，增加流体转动速度，降低入口能量消耗， 提高分离效率；在 UV 处理装置内加装进出口导流板，改善 UV 处理装置内的流场分布和增加紫外辐照时间。 采用Fluent 软件对旋流器的分离效率以及紫外装置内的流场、紫外辐照强度和剂量进行了仿真模拟。模拟结果表 明：阿基米德螺旋线形入口的旋流器的分离性能得到了改善；加导流板的UV 处理装置的紫外线辐照时间和平均 2 辐射剂量分别增加了0.57s 和41.9 mJ/cm ，提高了杀菌效果。 关键词：压载水处理系统；紫外线处理装置；旋流器；优化设计；仿真模拟 Optimized Design and Simulation Study of Ship’s Hydrocyclone and UV Ballast Water Treatment System CHEN Ning, MENG Meng, BAO Guozhi (School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China) Abstract: Combining with current ballast water treatment technologies, the treatment of ship’s ballast water was based on hydro cyclone and ultraviolet technologies in this paper. Hydro cyclone separation works as the first pretreatment to separate solid materials, of which the densities are greater than that of the sea water. Ultraviolet works as the secondary treatment to inactivate residual microorganism and bacteria. In this paper, Hydro cyclone and UV treatment device were optimized. The cyclone entry structure was design as Archimedes spiral entrance to increase fluid rotational speed, reduce the energy consumption and improve the separation efficiency. For the purposes of improving the flow field distribution inside the device and increasing the UV irradiation time, guide plates were added to the import and export