气固反应对流化床脉动特性的影响研究
Effect of Gas-solid Reaction on Fluctuation Characteristics in a Fluidized Bed
魏晋 1张静涛 1赵伟伟 1郭佳明 1林立阁 2王家兴2
作者信息
- 1. 内蒙古京海煤矸石发电有限责任公司,内蒙古 乌海 016000
- 2. 烟台龙源电力技术股份有限公司,山东 烟台 264006
- 折叠
摘要
针对流化床反应过程气固脉动行为,利用欧拉-拉格朗日方法探究气固异相反应引起的颗粒粒径变化对流化床反应器流化特性以及气泡演变行为的影响,结合小波分析方法,阐明反应导致的能量分率的变化规律.研究发现,反应的进行使生成的气体不断变多,气泡的效应比较明显,使得床料在床中的返混程度较为剧烈.相较于无反应,有反应使得颗粒脉动的能量分率提高,随着反应进行和反应程度减少,能量分率沿床宽分布差异减弱.
Abstract
Regarding the gas-solid pulsation behaviors in fluidized bed reaction process,the Eulerian-Lagrange method is employed to explore the impact of particle size variation caused by the reaction on flu-idization characteristics and bubble evolution behaviors in fluidized beds.The wavelet analysis method is adopted to analyze the change of energy fraction caused by the reactions.The results reveal that the pro-gress of reaction leads to a continuous increase in the amount of gas products,and the bubble effect is more pronounced,resulting in a more severe backmixing of bed materials in the bed.The reaction gener-ally increases the energy fraction of particle pulsation in contrast to that without the reaction.As the reac-tion proceeds and the reaction degree decreases,the radial distribution difference in energy fraction is weakened.
关键词
流化床/异相反应/气泡/脉动/欧拉-拉格朗日方法Key words
fluidized bed/heterogeneous reaction/bubble/fluctuation/Eulerian-Lagrange method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据