摘要
针对传统Zig-zag(波纹板)除雾器对细颗粒物捕集效率低、带钩板Zig-zag除雾器压降较大,均限制了Zig-zag除雾器性能的问题,提出一种改良内部结构的新型除雾器,运用计算流体力学(CFD)技术对采用多孔板设计的新型Zig-zag除雾器进行了数值模拟与研究.计算采用欧拉-拉格朗日两相流模型对连续相及离散相进行模拟,采用可实现的k-ε湍流模型模拟烟气湍流作用,采用随机轨道漫步模型对颗粒湍流效应进行描述.研究结果表明:多孔板除雾器相比于传统Zig-zag除雾器,除雾效率由81.1%提升至93.5%;相比于带钩板除雾器,在维持除雾效率的同时压降可降低35.6%.
As the traditional Zig-zag mist eliminator has little effect in collecting fine particles,and the tremendous pressure drop of the Zig-zag mist eliminator with baffle plate,which all constrains the performance of Zig-zag mist eliminator,a new type of mist eliminator with improved internal structure was proposed,and the computational fluid dynamics(CFD)technique was used to simulate and design a new type Zig-zag mist eliminator with perforated plate.The Euler-Lagrange two-phase flow model was used to simulate the continuous phase and the discrete phase,Realizable k-εturbulence model was used for simulates the effect of flue gas turbulence,and stochastic tracking model was used to describe the particle turbulence effect.Research results show that the separation efficiency of the perforated plate mist eliminator is increased from 81.1%to 93.5%compared with that of the traditional Zig-zag mist eliminator,which can reduce the pressure drop by 35.6%compared with that of the baffle plate,while maintaining the separation efficiency.
作者
罗光前
方灿
邹仁杰
姚洪
LUO Guangqian;FANG Can;ZOU Renjie;YAO Hong(State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第4期1-6,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家重点研发计划资助项目(2018YFB0605103).
关键词
湿法烟气脱硫
液滴
除雾器
多孔板
计算流体力学
wet flue gas desulfurization(WFGD)
droplet
mist eliminator
perforated plate
computational fluid dynamics
