基于CPFD方法的生物质燃气旋风分离陶瓷膜一体化除尘器仿真  

Simulation of an Integrated Biogas Cyclone Separator with Ceramic Membrane Based on Computational Particle Fluid Dynamics(CPFD)Method

作　　者：孙瑞豪 王啸远[1] 朱跃钊[1,2] 汪若凡 SUN Ruihao;WANG Xiaoyuan;ZHU Yuezhao;WANG Ruofan(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China;School of Energy Science and Engineering,Nanjing Tech University,Nanjing 211816,China;Nanjing Lianneng Environmental Technology Co.,Ltd.,Nanjing 210009,China)

机构地区：[1]南京工业大学机械与动力工程学院,南京211816 [2]南京工业大学能源科学与工程学院,南京211816 [3]南京联能环境科技有限公司,南京210009

出　　处：《动力工程学报》2024年第2期203-212,共10页Journal of Chinese Society of Power Engineering

基　　金：江苏省重点研发资助项目(BE2020115)。

摘　　要：为缩短高温燃气除尘工艺,提高除尘效率,提出了一种耦合复合陶瓷膜组的一体化旋风除尘器。在温度为573 K的条件下对陶瓷膜的流动阻力进行了实验研究,考察了流量和压力对单个陶瓷膜过膜压降的影响,得到过膜压降与流速之间的关系式,基于计算颗粒流体力学(CPFD)方法模拟了除尘器内部的气固两相流动特性,探讨了生物质燃气除尘过程中内部颗粒的分布规律、速度和停留时间,探究了复合陶瓷膜组对除尘器压降和效率的影响。结果表明:在入口温度为573 K、压力为111325 Pa、进口气体积流量为7909 m^(3)/h的条件下,较之无陶瓷膜组的除尘器,一体化除尘器内部粉尘颗粒的停留时间更长,其对粉尘颗粒捕集效率更高,颗粒聚集性能更好,除尘效率从91.2%提升至99.7%,然而总体压降增大了78 Pa。To shorten the high-temperature gas dedusting process and improve the collection efficiency,an integrated cyclone separator coupled with composite ceramic membrane was proposed.The flow resistance of ceramic membrane was experimentally investigated at 573 K.The effects of flow rate and pressure on pressure drop of a single ceramic membrane were examined,and the relationship between pressure drop and flow rate was obtained.The gas-solid flow characteristics inside the separator were numerically simulated using computational particle fluid dynamics(CPFD)method.The particles distribution,their velocities and residence time in the biogas dedusting process were examined.The effect of composite ceramic membrane group on pressure drop and collection efficiency of the separator was investigated.Results show that at the inlet temperature of 573 K,pressure of 111325 Pa,and inlet gas flow rate of 7909 m^(3)/h,the residence time of dust particles inside the integrated separator is longer than that of the separator without ceramic membrane group.And the particles are captured more efficiently with better aggregation.Its dust collection efficiency increases from 91.2%to 99.7%,while its overall pressure drop increases by 78 Pa.

关 键 词：生物质燃气 旋风分离器 CPFD 陶瓷膜除尘 除尘效率 

分 类 号：TK64[动力工程及工程热物理—生物能]