摘要
为了进一步提高SCR系统的脱硝性能,首先,利用UG软件建立SCR系统的三维模拟模型,将其导入计算流体动力学(computational fluid dynamics,CFD)软件中进行数值模拟仿真分析;然后,通过将仿真结果与试验数据进行比较,验证模拟模型的准确性和可靠性;最后,通过改变混合器的数量及其前后位置,以及调整喷射结构参数,研究这些因素对氨气均匀性的影响,进而分析了他们对SCR系统性能的影响。研究结果表明:喷射位置应设置在距离催化反应器进口处5D~7D(D表示管道直径)的地方;喷射孔的最佳数量为8个;喷射锥角为40°最为合适。此外,研究还发现,混合器的数量及其位置的变化能够显著提高尿素喷射雾化的效果,但同时也会增加SCR系统中的压力损失。因此,在提高喷射雾化效果的同时,必须考虑到压力损失的影响。本文的研究结果可以为SCR系统的尿素喷射参数优化提供理论参考和借鉴。
In order to further improve the de-NOx performance of the SCR system,this paper first establishes a three-dimensional simulation model of the SCR system using UG software,and then imports it into computational fluid dynamics(CFD)for numerical simulation analysis.Secondly,we verify the accuracy and reliability of the simulation model by comparing the simulation results with the experimental simulation results.Finally,by changing the number of mixers,the position changes before and after the mixers,and the injection structure parameters,the impact of these parameters on the uniformity of ammonia gas is studied,in order to determine the impact analysis on the performance of the SCR system.The research results show that the injection position should be set at a distance of 5~7 times the pipe diameter from the inlet of the catalytic reactor,the optimal number of injection holes is 8,and the optimal injection cone angle is 40°.In addition,the research has found that the number and position of mixers can improve the effectiveness of urea spray atomization,but have a significant effect on pressure drop in the SCR system.When improving the effectiveness of spray atomization,the effect of pressure drop needs to be considered.The research can effectively promote the optimization of urea injection parameters in future SCR systems and provide theoretical references.
作者
许红祥
许德衡
萧水清
许松
梁海明
XU Hongxiang;XU Deheng;XIAO Shuiqing;XU Song;LIANG Haiming(School of Artificial Intelligence,Jiangxi University of Science and Technology,Nanchang 330098,China;School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou 545616,China;School of Automotive Engineering,Guangxi Vocational and Technical College of Transportation,Nanning 450100,China)
出处
《广西科技大学学报》
CAS
2024年第4期1-8,共8页
Journal of Guangxi University of Science and Technology
基金
江西科技学院校级自然科学项目(232ZRYB03)
广西交通运输行业重点科技项目(JZY2020KZD04)资助。
