船舶主机SCR脱硝CFD流场模拟及设计优化  

CFD Flow Field Simulation and Design Optimization of the SCR Denitration for a Ship’s Main Engine

作　　者：张成健[1,2] 余鸿敏 赵健[1] 何静颖 吴卫红[1,3] 刘少俊 ZHANG Cheng-jian;YU Hong-min;ZHAO Jian;HE Jing-ying;WU Wei-hong;LIU Shao-jun(Institute of Atmosphere,Zhejiang University Energy Engineering Design and Research Institute Co.,Ltd,Hangzhou 310027,China;Research and Development Center,Lantian Environmental Protection Facilities Engineering Co.,Ltd,Hangzhou 310012,China;State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学能源工程设计研究院有限公司大气所,浙江杭州310027 [2]蓝天环保设备工程股份有限公司研发中心,浙江杭州310012 [3]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《江苏航运职业技术学院学报》2022年第2期15-25,共11页Journal of Jiangsu Shipping College

摘　　要：基于某船舶主机SCR脱硝系统采用CFD方法进行流场模拟研究及结构优化设计。首先,通过在烟道和反应器内设置导流板和气流分布板,优化系统结构。其次,分别研究了液滴雾化平均粒径D和喷射角度α对催化剂入口氨浓度的影响,结果表明:液滴平均粒径越小和喷射角度越大,液滴的停留时间越短。最后,研究了静态混合器对氨浓度分布的影响,结果显示:静态混合器能够显著提高氨与烟气的混合效率,平均值为60.2%。Based on a ship’s main engine SCR denitration system,a CFD method is used to conduct flow field simulation research and structural optimization design.Firstly,the system structure is optimized by arranging baffles and gas distribution plates in the flue and reactor.Secondly,the effects of droplet atomization average particle size D and spray angle α on the ammonia concentration at the catalyst inlet were studied respectively.The results show that the smaller the droplet average particle size and the larger the spray angle,the shorter the droplet residence time.Finally,the effect of the static mixer on ammonia concentration distribution was studied,and the results show that the static mixer could significantly improve the mixing efficiency of ammonia and flue gas,with an average value of 60.2%.

关 键 词：船舶 SCR脱硝 流场 数值模拟 设计优化 

分 类 号：U664.121[交通运输工程—船舶及航道工程]