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| Simulation and Experimental Study on Urea Spray Cone Angle of Selective Catalytic Reduction System for a Generating Set Diesel Engine |
| DOI：10.13949/j.cnki.nrjgc.2020.01.009 |
| Key Words:generating diesel engine selective catalytic reduction（SCR） computational fluid dynamics simulation urea crystallization spray cone angle |
| Author Name | Affiliation | | WANG Wenxiao,ZHU Zhifu,ZHAO Yingliang,WANG Sheng,GUI Jianhua3,WANG Jirong | 1.School of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266000, China
2.School of Physical Sciences, Qingdao University, Qingdao 266000, China
3.Shandong Konjun Environmental Protection Technology Co., Ltd., Weifang 261000, China |
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| Abstract:The urea spray cone angle of a selective catalytic reduction (SCR) system used on a high-power generating set diesel engine was studied. The crystallization risk and NH3 distribution uniformity in an urea mixing pipe with 4 different spray cone angles were simulated by a computational fluid dynamics software. Through the simulation analysis, two kinds of urea nozzles with spray cone angles of 60° and 70° were selected for the crystallization contrast test and performance comparison test. The results of the crystallization contrast test show that the crystallization risk of the 60° spray cone angle is obviously lower than the 70° spray cone angle. The performance comparison test indicates that the NOx conversion efficiencies of the two spray cone angles are basically the same. After the comprehensive analysis of the simulation calculations and test results, the urea spray cone angle of the SCR system is finally optimised to 60°. |
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