气-液顺流脱硫反应装置内流场的数值模拟  

Numerical simulation of flow field in gas-liquid downstream desulfurization reactor

作　　者：于菲 史汉祥 刘常胜 饶文军 史跃展 于勇[1] YU Fei;SHI Hanxiang;LIU Changsheng;RAO Wenjun;SHI Yuezhan;YU Yong(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;Ningbo Taiji Environmental Protection Equipment Co.,Ltd.,Ningbo 315000,China)

机构地区：[1]北京理工大学宇航学院,北京100081 [2]宁波太极环保设备有限公司,浙江宁波315000

出　　处：《洁净煤技术》2021年第6期163-169,共7页Clean Coal Technology

基　　金：宁波市“科技创新2025”重大专项资助项目(2018B10091)。

摘　　要：为了探究脱硫装置的旋流板安装角度对装置内部流体分布以及反应器耗能情况的影响,运用计算流体力学软件STAR-CCM+建立脱硫反应装置模型并对脱硫反应装置内部流体流动进行数值模拟。使用STAR-CCM+建立三维脱硫装置模型,选用k-Epsilon湍流模型,采用有限体积法进行计算求解反应装置内的不可压缩流动。保持反应装置结构不变,仅调整反应装置内旋流板的安装角度进行变工况分析。通过观察不同旋流板安装角度(30°、35°、40°、45°、50°、55°、60°)时装置内流线、流体速度分布、湍动能分布和压降分布规律,分析装置内气相流动以及分布对脱硫效率和耗能情况的影响。结果表明:最大流速发生在旋流板处;角度越大流体越紊乱,气体和脱硫液反应越充分;旋流板角度为60°时装置内的紊乱程度最理想;角度从30°增加到60°,流经旋流板的流体速度从16 m/s增大到35 m/s;角度的增大会增加湍动能的最大值,但30°时湍动能分布范围最理想;角度越大反应装置的总压降越大,耗能越多,30°时压降损耗最小,约为60°时压降的54%,有利于节约能源,提升经济效益。In order to explore the influence of blades angle on the flow field distribution and energy consumption of desulfurization reactor,the desulfurization reaction device model was established and the flow field in the desulfurization reactor was numerical simulated using computational fluid dynamics software STAR-CCM+.Three-dimensional desulfurization reactor model was established by using STAR-CCM+software with the k-Epsilon turbulence model and the finite volume method was used to solve the incompressible flow in the reactor.By keeping the structure of the reaction device unchanged,the results of changing conditions were analyzed by only adjusting the installation angle of the blades.By observing the distribution of streamline,fluid velocity and turbulent kinetic energy,and regularities of pressure drop at the different blade installation angles(30°,35°,40°,45°,50°,55°,and 60°),the influence of distribution of gas phase on desulfurization efficiency and energy consumption was analyzed.The results show that the maximum velocity occurs at the blades.The larger the angle,the more disordered the fluid,and the more sufficient the reaction between gas and desulfurization liquid.The disturbance degree in the reactor is ideal when the angle of blades is 60°.The angle increases from 30°to 60°,and the fluid velocity through the blades increases from 16 m/s to 35 m/s.The increase of blades angle increases the maximum value of turbulent kinetic energy,but the distribution range of turbulent kinetic energy is ideal at 30°.The larger the blades angle,the larger the total pressure drop of the desulfurization reactor and the more energy consumption.The pressure drop is minimum at 30°,about 54%of the pressure drop at 60°,which is beneficial to energy saving and increasing economic benefits.

关 键 词：脱硫反应装置 旋流板 气相分布 k-Epsilon湍流模型 压降损耗 

分 类 号：TQ54[化学工程—煤化学工程] X511[环境科学与工程—环境工程]