湿法烟气脱硫系统中折板式除雾器性能的数值模拟  

Numerical simulation of performance of chevron mist eliminator in wet-FGD

作　　者：陈凯华[1] 宋存义[1] 李强[1] 刘枫[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《环境工程学报》2007年第7期91-96,共6页Chinese Journal of Environmental Engineering

摘　　要：采用CFD软件对湿法烟气脱硫系统中广泛使用的折板式除雾器的主要性能进行了数值模拟。建立了数学模型,对气体相采用基于雷诺时均方程的SSTk-ω湍流模型封闭N-S方程,对液滴相采用基于Eu ler-Lagrange的DPM方法。通过调节除雾器的结构参数和工作参数,揭示了气液两相流动的流场,分析了结构参数对除雾器分离效率和工作压力降的影响,可用于湿法烟气脱硫系统中折板式除雾器的设计和优化。A CFD software was used to simulate the characteristics of flow fields and performance of chevron mist eliminator in wet-FGD. A mathematical model was established for simulating the separation efficiency and pressure drop of the mist eliminator. The N-S equations are closed with SST equations and DPM, which is based on Euler-Lagrange method. By calculating the separation efficiency and pressure drop of various mist eliminators with different structural parameters and working parameters, their effects on efficiency and press drop have been analyzed. The results can be used for designing and optimizing mist eliminator in wet-FGD.

关 键 词：Wet—FGD 折板式除雾器 CFD 分离效率 压力降 

分 类 号：X701.3[环境科学与工程—环境工程]