相变凝聚器中可凝结细颗粒脱除效率和能耗综合性能优化  

Comprehensive performance optimization of particle removal efficiency and energy consumption in phase-change agglomerator

作　　者：周刘松 ZHOU Liusong(Sinopec Nanjing Chemical Industries Co.,Ltd.,Nanjing 210000,Jiangsu Province,China)

机构地区：[1]中国石化集团南京化学工业有限公司,江苏南京210000

出　　处：《化学工程》2025年第2期71-77,共7页Chemical Engineering(China)

摘　　要：针对可凝结细微颗粒难以脱除的问题,文中通过相变凝聚器对烟气进行降温形成过饱和环境,利用蒸汽凝结促使可溶颗粒物长大,并在惯性作用下,颗粒与换热管壁面碰撞而被捕集。基于可溶颗粒异质凝结理论构建双向耦合的CFD-DEM数值模型,分析关键操作参数和结构参数对相变凝聚器性能的影响规律。结果表明:随着进口气速的增大,脱除效率先增大后减小;随着进口温度、管排数的减小,颗粒质量浓度、冷凝管壁温、管间距的增大,脱除效率减小;随着进口气速、管排数的增大,管间距的减小,装置压降逐渐增大。最后,基于组合元和遗传算法对关键参数进行多目标优化,优先考虑脱除效率的前提下,优化设计点较初始工况的脱除效率高出6.91%,压降仅增加约37.33 Pa。To address the problem of difficult removal of condensable particle matters,the supersaturated environment was formed by cooling the flue gas with phase-change agglomerator.By using heterogeneous condensation method,the soluble particles were encouraged,and under the influence of inertia force,the particles collided with the heat exchange tube walls.A two-way coupled CFD-DEM numerical model based on the heterogeneous condensation theory of soluble particles was developed to analyze the effects of key operational and structural parameters on the performance of the phase-change agglomerator.The results indicate that as the inlet gas velocity increases,the removal efficiency first increases and then decreases.As the inlet temperature and number of tube rows decrease,while the particle mass concentration,temperature of tube walls and tube spacing increase,the removal efficiency decreases.As the inlet gas velocity and number of tube rows increase,and the tube spacing decreases,the pressure drop across the device gradually increases.Finally,multi-objective optimization of the key parameters was conducted using metamodels and genetic algorithm.With the primary focus on maximizing the removal efficiency,the optimized design point achieves a 6.91%higher removal efficiency than the initial operating condition,and the pressure drop is only increased about 37.33 Pa.

关 键 词：可溶颗粒 凝结生长 相变凝聚器 数值模拟 

分 类 号：TE121[石油与天然气工程—油气勘探]