气-固循环流化床底部密相区研究进展  

Research Development of Bottom Dense Phase Zone of Gas-solid Circulating Fluidized Bed

作　　者：刘宝勇[1] 魏绪玲 张斌[1] 王良成[1] 杨西[1] 

机构地区：[1]兰州交通大学化学与生物工程学院,甘肃兰州730070 [2]中国石油石油化工研究院兰州化工研究中心,甘肃兰州730060

出　　处：《化工技术与开发》2014年第3期38-42,共5页Technology & Development of Chemical Industry

基　　金：甘肃省自然科学基金项目(213225);兰州交通大学青年科学基金项目(2013011)

摘　　要：循环流态化技术在过程工业中广泛应用。循环流化床底部密相区对整个流化床的流体动力学特性、传热、化学反应及污染物脱除意义重大。本文总结了底部密相区固含率轴向分布和径向分布,概述了底部密相区颗粒速度的径向分布,并详细介绍了底部密相区的流动形态,包括鼓泡流态化、湍动流态化及最新研究结果,同时也描述了循环流化床底部密相区的固体混合及传热。最后,展望了今后的研究方向。Circulating fluidization technology was widely used in process industry. Bottom dense phase zone of a gas-solid circulating fluidized bed was particularly important for hydrodynamics of the whole fluidized bed, heat transfer, chemical reaction and pollutants removal. Axial and radial solid concentration profiles in the bottom dense phase zone were summarized. Radial particle velocity profile in the bottom dense zone was outlined. The flow regimes in the bottom dense phase zone were discussed in detail, included bubbling fluidization, turbulent fluidization and the latest research results. At the same time, solid mixing and heat transfer were also introduced. The future research was forecasted.

关 键 词：循环流化床 流体动力学 流域 底部密相区 传热 

分 类 号：TQ021[化学工程]