基于流场分析的脱硫塔搅拌器布置优化  

Optimization of Desulfurization Tower Stirrer Layout Based on Flow Field Analysis

作　　者：肖向前 鄢曙光[1] 王志远 张浩然 无 XIAO Xiangqian;YAN Shuguang;WANG Zhiyuan;ZHANG Haoran;无(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Provincial Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081

出　　处：《湖南科技大学学报(自然科学版)》2025年第1期22-29,共8页Journal of Hunan University of Science And Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(52204282)。

摘　　要：以某厂湿法脱硫塔中浆液搅拌器位置分布为研究对象,采用CFD软件模拟脱硫塔的底部浆液循环系统,分析搅拌器的搅拌作用及循环泵抽吸作用对流场的影响,提出了非对称布置搅拌器和氧化风管结构的优化方案,并对优化后的设计方案进行两相流的模拟,分析塔底浆液的水平和垂直截面的速度和气体分布,对比优化前后的不同高度水平面的平均速度和气含率.模拟结果表明:原布置方案45°与135°处的搅拌器和氧化风管出口受循环泵抽吸作用影响,整体旋流情况较差,不利于氧化气体的分散.优化改进后,搅拌器相互位置更近,产生更强的联合助推效果形成了旋转浆液流,提高了氧化气体的扩散能力.优化后关键平面的液相平均速度提高了10%以上,亚硫酸钙与氧化气体反应区间的气含率提升了12%~28%.Taking the position distribution of the slurry agitator in a wet desulfurization tower of a certain factory as the research object,CFD software is used to simulate the bottom slurry circulation system of the desulfurization tower,and the influence of the stirring effect of the agitator and the suction effect of the circulation pump on the flow field is analyzed,and a non-linear method is proposed.It optimizes the structure of the symmetrically arranged mixer and oxidation air duct,simulates the two-phase flow of the optimized design,analyzes the velocity and gas distribution of the horizontal and vertical sections of the slurry at the bottom of the tower,and compares the average velocity and gas holdup of horizontal planes at different heights before and after optimization.The simulation results show that the agitator and oxidation air duct outlet at 45 and 135°in the original layout plan are affected by the suction action of the circulation pump,and the overall swirl situation is poor,which is not conducive to the dispersion of oxidation gas.After optimization and improvement,the agitators are located closer to each other,resulting in a stronger joint boosting effect to form a rotating slurry flow,which improves the diffusion capacity of oxidizing gas.After optimization,the average velocity of the liquid phase on the key plane has increased by more than 10%,and the gas content in the reaction zone between calcium sulfite and oxidizing gas has increased by 12%to 28%.

关 键 词：脱硫塔 CFD数值模拟 搅拌器布置 旋转流体 气含率 

分 类 号：X701.3[环境科学与工程—环境工程]