喷嘴数量对文丘里除尘器性能影响的模拟  

Simulation of influence of orifice quantity on the performance of venturi scrubber

作　　者：刘立新[1] 罗晶 司群猛 李学刚 刘桂丽[1] 

机构地区：[1]青岛理工大学汽车与交通学院,青岛266520 [2]中国石油大学(华东)化学工程学院,青岛266580

出　　处：《环境工程学报》2016年第9期5063-5068,共6页Chinese Journal of Environmental Engineering

基　　金：山东省自然科学基金面上项目(ZR2013EEM024);山东省高等学校科技计划项目(J14LA08)

摘　　要：选用欧拉-欧拉多相流模型和RNG k-ε湍流模型对文丘里除尘器流动特性进行数值模拟,首先对2个喷嘴时不同液体速度下的压力降和喉管液体分布情况进行模拟,并与实验值进行了比较,得到了较好的一致性;然后比较了2个喷嘴和4个喷嘴的情况下不同液体速度时文丘里除尘器的压力降和液体分布情况。模拟结果表明:欧拉-欧拉多相流模型可准确地模拟文丘里除尘器内部流场;喷嘴数量对文丘里除尘器内部的压力降和液体分布有较大影响,当相对射流深度为0.2,喉管气速为64 m·s-1,喷嘴数量由2增加为4时,压力降增加了17.17%,在喷嘴数目为4,喉管气速为74 m·s-1,液体速度为12.5 m·s-1时可使液体在文丘里除尘器内部得到较均匀的分布。The Euler-Euler muhiphase model and the renormalization group （RNG） k-e turbulence model were used in this study to investigate the fluid dynamics of the venturi scrubber. Initially, the pressure drop and the liquid distribution with two orifices at different liquid rates were studied. The simulation results showed good agreement with the experiment before. Subsequently, the pressure drop and liquid distribution with two and with four orifices were compared. The results illustrated that the Euler-Euler multiphase model could predict well the fluid dynamic of the venturi scrubber. The number of orifices had a significant influence on the pressure drop and liquid distribution of the venturi scrubber, with the pressure drop increasing 17.17% when the number of orifices increased from two to four, while keeping the liquid jet central penetration and the velocity of the throat gas con- stant at 0.2 and 64 m · s-1, respectively. The liquid distributed well in the venturi scrubber with four orifices, at 74 m ·s-1 throat gas velocity and 12.5 m · s-1 liquid velocity.

关 键 词：文丘里除尘器 数值模拟 喷嘴数量 压力降 液体分布 

分 类 号：X701[环境科学与工程—环境工程]