循环流化床流动特性分析.pdf

燃　烧　科　学　与　技　术 ( ) ( ) 第 5 卷 1999 第 3 期 . 5 1999 . 3 V o l N o JOURNAL OF COM BUSTION SC IENCE AND TECHNOLOGY 990051 循环流化床流动特性分析 赫　俏　陆继东　张新文　钱诗智 (华中理工大学煤燃烧国家重点实验室) 摘　　　　　要 　　基于循环流化床 (CFB ) 的流动特性, 提出了一个求解其流动结构的模型。模型综合考虑了床 内粒子空间分布的轴向和径向不均匀性, 可以预测各种运行条件下床内颗粒浓度分布情况, 并能 清楚地表示床的几何尺寸、运行工况对循环流化床流动特性的影响。 关键词: 循环流化床, 流体动力学, 模型 Study on the Fluid Character istics of C ircula ting Fluid ized Bed He Qiao　L u J idong　Zhang X inwen 　Qian Sh izh i (H uazhong U niversity of Science and T echno logy) Abstract 　　Based on the hydrodynam ics of a circulating fluidized bed , a model of fluid structure is p re . . sented T he un equal distribution of particles in axes and radial are taken into consideration T h is model can p redict the particle consistence in the bed and describe the influence of the bed size and . operation conditions on the fluid structure T he results are impo rtant to the design and operation of . CFB bo ilers : , , Key words C irculating fluidized bed H ydrodynam