船舶压载水紫外处理模块的模拟优化及实验研究  

Simulation of optimization and experimental research on ultraviolet sterilizer for ballast water system

作　　者：鲁正 刘晓蕾 张坤[1] 施悦[1] LU Zheng;LIU Xiaolei;ZHANG Kun;SHI Yue(College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China;School of Economics and Management,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学经济管理学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2018年第12期1956-1962,共7页Journal of Harbin Engineering University

基　　金：国家重点研发计划项目(2017YFC1404605);国家自然科学基金项目(51579049;51509044);高技术船舶项目

摘　　要：针对应用紫外(UV)技术处理船舶压载水过程中存在的机制不清、模拟困难等机理问题,采用系统改进前的实验结果作为样本,利用神经网络模型对影响系统杀菌效果的不同因子进行重要性排序。并结合计算流体力学(CFD)和光学仿真(Tracepro)对系统内UV灯管的不同排布方式进行内部流态和光强分布研究,提出系统的优化控制参数与调控对策。结果表明:UV为系统最重要的可控因子;卧式反应器低流量下易形成涡流,高流量下水力停留时间短,可能导致杀菌不彻底,而立式反应器更加合理,其水流主体方向上流态为推流,在径向方向上能够完全混合; UV灯管横置时光强分布最均匀,杀菌效果最好,与实验结果一致,实现了"灰箱"问题趋于部分"透明"。To solve the mechanical problems in the application of ultraviolet(UV)sterilizer to ship ballast water treatment,such as vagueness of internal mechanisms and difficulty of simulation,this paper applies experimental results as samples before improvement of the system,and uses back propagation-artificial neural network to rank the importance of various factors that affect the sterilization effect of the system.Furthermore,computational fluid dynamics and TracePro are used to conduct the study on internal flow field and UV intensity distribution,and proposes the optimization control parameter and control countermeasures for the system.Results show that the UV factor is the most important controllable factor in the system.The horizontal reactor is prone to form eddy currents under low flow,and the hydraulic residence time is short under high flow,which could lead to incomplete sterilization.However,a vertical reactor is more rational because its main flow is plug flow and can be mixed completely in the radial direction.The light intensity is most evenly distributed when the UV tube is horizontal,which brings the best sterilized effect and is consistent with the experimental results,achieving partial transparency from the“gray-box”state.

关 键 词：压载水 紫外杀菌器 数值模拟 人工神经网络 流场流态 光强分布 工艺优化 灭活效果 

分 类 号：X55[环境科学与工程—环境工程]