Structure optimization of vessel SCR based on CFD and RSM

被引：0
|
作者：
Fu Y. [1 ,2 ]
Chen X. [1 ,2 ]
Zhong W. [1 ,2 ]
Zhan J. [1 ,2 ]
机构：
[1] Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing
[2] School of Energy and Environment, Southeast University, Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2019年 / 49卷 / 03期
关键词：
Numerical simulation; Optimization design; Response surface method; Selective catalytic reduction;
D O I：
10.3969/j.issn.1001-0505.2019.03.021
中图分类号：
学科分类号：
摘要：
It is crucial to optimize the vessel selective catalytic reduction(SCR) structure to meet compact ship space. In the current study, a marine SCR system was studied based on computational fluid dynamics (CFD) and response surface method (RSM). The effects of the catalyst size and the distance between mixing chamber and nozzle on de-NOx efficiency, and the ammonia slip was studied in detail. CFD data were used as samples for the response function fitting, and the structure of SCR was miniaturized by determining the extreme value of the response function. Simulation results indicate that the mixing chamber can enhance the mixture of urea and exhaust gas. The denitrification efficiency and the ammonia slip increase and decrease with the decrease of SCR catalyst size. The size of the catalyst after RSM optimization can be reduced by 15.9% to 45.2%, the most suitable mixing chamber position is 1.70 to 2.39 m from the nozzle. Under this circumstance, the de-NOx efficiency is over 90%, and the ammonia slip mass is less than 5×10-6. © 2019, Editorial Department of Journal of Southeast University. All right reserved.
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页码：549 / 557
页数：8
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