摘要
基于FLUENT 6.3软件对600 MW燃煤锅炉烟气选择性催化还原(Selective Catalytic Reduction,SCR)脱硝系统的导流优化设计进行数值模拟研究.研究结果表明:无导流装置下,因烟道截面变化及弯头偏转,SCR系统流场出现严重不均,AIG下游截面两侧速度差达15 m/s,反应器入口速度偏差为31.25%,且尾部烟道内流场不均,影响下游设备运行.设计合理的导流板可有效改善烟道流场分布;入口大小头处加装两组纵向导流板使AIG下游截面速度偏差减小为15%,反应器入口截面速度偏差降为13%;弯头处的导流板加装延伸导流段,可对下游流场起到良好的均流效果.
Based on FLUENT6. 3 software,the simulation and analysis were applied to the optimization design of splitters in Selective Catalytic Reduction（ SCR） denitrification system for a 600 MW coal-fired boiler. The results show that because of variable cross-section and deflection in flue,flow field in the system appears nonuniform severely when there is no splitters. The velocity difference on two sides of the section at AIG lower reaches is up to 15 m / s,the velocity deviations in the reactor inlet is 31. 25%,and the flow field is poor in tail flue,which affects the operation of downstream equipments. Reasonable splitters can improve flow field in flue effectively. After equipping the transition pipe of the inlet with two group of longitudinal splitters,the velocity deviations in section at AIG lower reaches is reduced to 15% and in the reactor inlet is reduced to 13%.Splitters in elbow is equipped with an extension for guiding,which have a good effect on homogenization of the downstream flow field.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2015年第4期37-40,共4页
Journal of Zhengzhou University（Engineering Science）
基金
河南省科技攻关计划项目(142102210459)
关键词
SCR
流场
导流装置
优化
SCR
flow field
splitters
optimization
