烟气脱硫卧式喷淋塔的数值模拟  

Numerical simulation on wet flue gas horizontal spray tower

作　　者：李睿[1] 苏伟[1] 宋存义[1] 邢奕[1] 童震松[1] 张秋林[1] 朱生俊[1] 冷廷双[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京首科兴业工程技术有限公司,北京100043

出　　处：《环境工程学报》2016年第10期5798-5802,共5页Chinese Journal of Environmental Engineering

基　　金：北京市科技计划首都蓝天行动(D151100004915003);中央高校基本科研业务费专项资金资助项目(FRE-TP-15-051A1)

摘　　要：卧式喷淋塔是北京科技大学环境中心研发的新型湿法烟气脱硫工艺,在一定程度上克服了立式喷淋塔的缺点,做到了高效率、低压损、低成本、易检修。但在工程实例中仍存在一些问题。为了研究不同喷淋布置方式对卧式喷淋塔的影响,构建了卧式喷淋塔的稳态三维的多相CFD模型三维,并使用Fluent软件进行模拟。连续相湍流模型采用了标准k-ε双方程模型,液滴离散相模型采用了Eulerian-Lagrangian模型。结果表明,喷淋布置方式的喷雾锥角为110°,安装高度控制在距顶面0.8 m,喷射方向与竖直方向成45°时,能显著减小压力损失、延长烟气停留时间、增强气液接触效率,最终提高脱硫效率,降低功率能耗。研究结果可为实验设计、工程应用提供指导。A horizontal spray tower is a new flue gas desulfurization technology developed by the Environmental Center of USTB,which overcomes the shortcomings of a vertical spray tower to a certain extent,and achieves high efficiency,a lower pressure loss,lower costs,and easy maintenance. However,some problems in the engineering still remain. To study the influence of different spray layout methods on a horizontal spray tower,a steady-state,three-dimensional,multi-phase CFD modeling of such a tower was carried out in this study,and a simulation was conducted using Fluent software. The continuous phase turbulence is modeled using the standard k-ε equation turbulence model. The particle trajectory model is modeled using an Eulerian-Lagrangian approach.The results show that a spray angle of the sprinkler layout of 110°,a mounting height of 0. 8 m from the top surface,and ejection and vertical directions of 45° can significantly reduce the pressure loss,prolong the residence time of the flue gas,enhance the gas-liquid contact efficiency,and ultimately improve the desulfurization efficiency and reduce the amount power consumption. The results can provide advice regarding the experimental design and engineering applications.

关 键 词：卧式喷淋塔 脱硫 数值模拟 喷淋布置 

分 类 号：X701.3[环境科学与工程—环境工程]