底饲进料循环喷动床颗粒分布特性  

Solid Distribution Characteristic in the Underfeed Circulating Spouted Bed

作　　者：陶敏[1] 金保升[1] 杨亚平[1] 陈浩[1] 

机构地区：[1]东南大学能源与环境学院,江苏省南京市210096

出　　处：《中国电机工程学报》2009年第11期57-62,共6页Proceedings of the CSEE

摘　　要：为研究底饲进料方式对于改善反应塔内颗粒分布对称性和均匀性的效果,在一台φ0.6m×15m的底饲进料循环喷动床冷态实验装置上,通过等速取样的方法得到反应塔内正向颗粒通量在截面上的分布规律,并比较不同操作条件对颗粒通量径向分布的影响。研究结果表明:相对于面饲方式,采用底饲进料能够显著改善颗粒相在截面各方向上的分布均匀性;流化速度和喷射速度是影响塔内颗粒分布的重要因素,随着流化速度的上升,颗粒通量在径向上的对称性提高,采用较高的喷射速度可以明显改善颗粒分布在径向上的分布状况。In order to investigate the effect of underfeed style on improving the symmetry and uniformity of solid distribution, a series of experiments were conducted in a Ф0.6m×15 m underfeed circulating spouted bed and the solid upflow flux distribution on sections was acquired by means of isokinetic sampling. The influence of operation parameters on the radial distribution of solid fluxes was also studied. The results indicate： Comparing with the face-feed style, the technology can distinctly improve the distribution of particle fluxes in the riser. The fluidizing and spouting velocity have significant influence on the radial distribution of solid particles. As the fluidizing velocity advances, the solid distribution gets more uniform. Applying higher spouting velocity, the symmetry of solid flux distribution in the radial direction can be obviously improved.

关 键 词：底饲进料循环喷动床 气固两相流 颗粒通量 分布均匀性 

分 类 号：X51[环境科学与工程—环境工程]