化工进展2017，Vol.36Issue(2)：742-749,8.DOI:10.16085/j.issn.1000-6613.2017.02.047
船舶SCR脱硝尿素喷射分解及氨气分布均匀性的优化
Optimization of uniformity of NH3distribution and thermolysis of urea in the SCR marine process
摘要
Abstract
The distribution process of NH3 in the SCR marine mixing chamber was investigated by numerical simulation. The simulation model considered atomization,evaporation,and thermolysis of urea,and its interaction with gas turbulence. This model provides the detailed information of velocity field,temperature field,component field,and trajectories of the droplets. Production and distribution of NH3 was affected by flue gas temperature,inlet turbulent intensity,and swirl mixing. It is found that,by increasing the flue gas temperature,inlet turbulent intensity or adding a swirl mixer,the evaporation and thermolysis of urea solution accelerated,and the distribution uniformity increased. However,if the swirl angle was too large,some drops would impact the wall of the pipe,which would decrease the NH3 production. Comparing the cases of swirl angle with 15°,30°and 45°,it is found that the 30°swirl mixer yielded the best performance,which decreased NH3distribution non-uniformity from 39.57% to 9.36%.关键词
选择性催化还原/脱硝/氨分布均匀性/数值模拟Key words
SCR/de-NOx/NH3 distribution uniformity/numerical simulation分类
能源科技引用本文复制引用
王铮,刘道银,刘猛,吴勤瑞,檀净,陈晓平..船舶SCR脱硝尿素喷射分解及氨气分布均匀性的优化[J].化工进展,2017,36(2):742-749,8.基金项目
国家自然科学基金项目（51306035）。 （）
