烟气脱硫卧式喷淋塔的数值模拟

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。

Numerical simulation on wet flue gas horizontal spray tower

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.