SV型静态混合元件组件数目对SCR系统竖直烟道混合效果的影响  

Influence of the Number of SV Static Mixing Elements on the Mixing Performance of the Vertical Flue of the SCR System

作　　者：张春梅[1] 丁桂彬 刘彬 李宇轩 李雅侠[1] ZHANG Chun-mei;DING Gui-bin;LIU Bin;LI Yu-xuan;LI Ya-xia(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学机械与动力工程学院,沈阳110142

出　　处：《当代化工》2021年第12期2996-3000,3008,共6页Contemporary Chemical Industry

基　　金：辽宁省自然科学基金面上项目(项目编号:2019-MS-259)。

摘　　要：借助计算流体力学的方法,对某大型选择性催化还原(SCR)反应器前竖直烟段内的流场进行数值模拟,研究了SV型静态混合元件组件数目的变化对竖直烟道内速度场、浓度场以及压降的影响,根据数值模拟结果分析了SV型静态混合元件组件数目对竖直烟道混合效果影响的作用规律。结果表明:竖直烟道内的混合效果随着组件数目的增多逐渐得到改善,速度和浓度的相对标准偏差系数均能降低到11%左右,但是当组件数目由10片增加到30片后,系统压降增幅达55.45%。由此可见,适当增加组件数目能比较经济地提高竖直烟道内的混合效果。Using the computational fluid dynamics method,the influence of the number of SV type static mixing components on the velocity field,concentration field and pressure drop in the vertical flue was studied by numerical simulation of the flow field in the vertical flue in front of a large selective catalytic reduction(SCR) reactor.The results showed that the mixing effect in the vertical flue was improved gradually with the increase of the number of components,and the relative standard deviation coefficients of velocity and concentration were reduced to about 11%.However,when the number of components increased from 10 to 30,the pressure drop increased by 55.45%.Therefore,it was economical to increase the mixing effect in vertical flue by increasing the number of components properly.

关 键 词：数值模拟 SCR SV型静态混合元件 速度分布 浓度分布 

分 类 号：TQ051.7[化学工程]