内循环流化床结构参数及其反应器性能的相关性  

Relationship between Reactor Performances and Structural Parameters of Inner-loop Three-phase Fluidized Bed

作　　者：韦朝海[1] 谢波[1] 张献忠[1] 钱宇[1] 

机构地区：[1]华南理工大学化工学院,广东广州510640

出　　处：《高校化学工程学报》2001年第3期236-241,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家教育部跨世纪优秀人才培养计划基金资助项目;国家自然科学基金资助项目!(编号: 29407051);广东省自然科学基金资助项目!(编号: 0

摘　　要：内循环三相流化床在化学工程、生物工程及废水处理等领域中均有广泛的应用前景，目前影响这类反应器成功应用于实际废水生物处理的主要原因是缺乏系统的反应器结构参数与反应器性能的相关性分析与量化关系模型，无法实现不同规模与不同应用目标的系统优化设计。基于此，设计了不同尺寸和内构件的反应器，系统研究主要结构参数包括升流管与反应器直径之比、反应器高径比、升流管上方液面高度、底隙高度以及操作参数如固相负荷及通气量等因素对内循环流化床反应器流体力学与传质特性的影响规律; 实验分析主要过程参数如气含率、液体循环速度、氧传递系数及混合时间与结构参数、操作参数的相关性。通过总结归纳，分别给出了定量、半定量或定性方面的结论，为反应器的结构放大和性能变化预测提供理论基础。An inner-loop three-phase fluidized bed with different structural parameters and draft tubes was developed, in which the main structural parameters of this kind reactor studied were the ratio of height of draft tube to reactor diameter, the aspect ratio (height to diameter) liquid height above draft tube, height of bottom clearance, and operating parameters studied were solids loading and superficial gas flow rate, all of which have significant influences on hydrodynamics and mass transfer of the reactor. The effects of structural and operating parameters on gas holdup, liquid circulation velocity, volumetric mass transfer of oxygen, and mixing time were obtained from different experiments. Based on these experiments, the quantitatively mathematical models, semi-quantitatively mathematical models, and qualitative description were expounded. The results offer theoretical foundation for the engineering scale-up and performances of the reactor.

关 键 词：内循环三相流化床 结构参数 反应器性能 相关性 废水处理 设备 

分 类 号：X703.3[环境科学与工程—环境工程] TQ051.3[化学工程]