摘要
为综合考量选择性催化还原(SCR)系统静态混合器的混合效果和对系统造成的阻力损失,提出了一种结合流场均匀性和阻力特性的综合性能评价指标——无量纲混合效率η。结合现场需求,采用数值模拟方法,以圆形、花瓣形和SMV混合器为例对系统的综合性能进行评估。结果表明:圆形混合器、SMV混合器、花瓣形混合器的η分别为16.18%、22.50%和26.88%,其中花瓣形混合器综合性能最佳;在顺序排列、同向布局、覆盖率为37%的条件下,花瓣形混合器的综合性能达到最佳,其无量纲混合效率η为28.60%,较优化之前提高6.40%。
In order to comprehensively evaluate the mixing effect and drag loss of static mixers in selective catalytic reduction(SCR)system,a comprehensive performance evaluation index combined the uniformity of flow field and drag characteristics-dimensionless mixing efficiencyηwas proposed.According to the field requirements,the comprehensive performance of the system was evaluated by numerical simulation method with circular,petal and SMV mixers as examples.Results show that theηof circular mixer,SMV mixer and petal-shaped mixer are 16.18%,22.50%and 26.88%,respectively.The petal-shaped mixer has the best comprehensive performance.Under the condition of sequence arrangement,same direction layout and coverage rate of 37%,the overall performance of the petal-shaped mixer is the best,and its dimensionless mixing efficiencyηis 28.60%,which is 6.40%higher than before optimization.
作者
李兴磊
卢志民
李德波
李博航
郭松杰
姚顺春
LI Xinglei;LU Zhimin;LI Debo;LI Bohang;GUO Songjie;YAO Shunchun(School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China;Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization,Guangzhou 510640,China;Guangdong Province Engineering Research Centre of High Efficiency and Low Pollution Energy Conversion,Guangzhou 510640,China;China Southern Power Grid Technology Co.,Ltd.,Guangzhou 510030,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2023年第12期1641-1648,共8页
Journal of Chinese Society of Power Engineering
基金
国家重点研发计划政府间国际科技创新合作资助项目(2019YFE0109700)
广东省省级科技计划资助项目(2020A0505140001)。
关键词
选择性催化还原
无量纲混合效率
静态混合器
综合性能优化
数值模拟
SCR
dimensionless mixing efficiency
static mixer
comprehensive performance optimization
numerical simulation
