中国电机工程学报2024，Vol.44Issue(6)：2301-2309,后插18,10.DOI:10.13334/j.0258-8013.pcsee.221856
烟气凝变过程中SO3酸雾凝结长大与脱除特性模拟研究
Numerical Simulation of Condensation Growth and Removal Characteristics of SO3 Acid Mist in Flue Gas Condensation Process
摘要
Abstract
The flue gas condensation technology can recover waste water and heat from wet flue gas and simultaneous reduce the emission of SO3 acid mist.The numerical models of flue gas condensation,particle movement and particle condensation growth are established to simulate the condensation growth and removal characteristics of SO3 acid mist in the process of flue gas condensation.The effects of key influencing parameters are analyzed,and the mechanisms of growth and removal are discussed.The results indicate that the SO3 acid mist has a bimodal distribution at the outlet of the heat exchanger after condensation growth and the highest concentration is in the micron range.The capture mechanisms of acid mist with a sub-micron particle size are mainly thermophoresis and diffusiophoresis.Increasing the inlet flue gas temperature and relative humidity,and reducing tube wall temperature and inlet flow velocity are all conducive to the growth and removal of acid mist.The capture mechanisms of acid mist with micron particle size are mainly inertial collision and interception,and increasing the inlet flow velocity is beneficial for its removal.关键词
凝变/换热器/数值模拟/脱除效率/饱和度Key words
condensation/heat exchanger/numerical simulation/removal efficiency/saturation分类
资源环境引用本文复制引用
裴婷,马素霞,赵贯甲,王鹏,宋冠强,米晨锋..烟气凝变过程中SO3酸雾凝结长大与脱除特性模拟研究[J].中国电机工程学报,2024,44(6):2301-2309,后插18,10.基金项目
山西省科技重大专项(20181102010).The Major Science and Technology Special Project of Shanxi Province(20181102010). （20181102010）
