Gas-solid Flow Characteristics in High-density CFB  

作　　者：Xue-yao Wang Bao-guo Fan Sheng-dian Wang Xiang Xu Yun-han Xiao 

机构地区：[1]Research Center for Clean Energy and Power, Chinese Academy of Sciences,Key Laboratory of Advanced Energy and Power, Chinese Academy of Sciences (Institute of Engineering Thermophysics), Beijing, China

出　　处：《Journal of Thermal Science》2012年第4期354-358,共5页热科学学报(英文版)

基　　金：supports by the National Natural Science Foundation of China (51006106);the National High Technology Research and Development of China 863 Program (2006AA05A103)

摘　　要：The gas-solid flow characteristics in the riser of a high density CFB of square (0.27 m×0.27 m×10.4 m) or circu-lar (? 0.187m×10.4 m) cross section, using Geldart B particles (quartz sand), was investigated experimentally. The influence of riser structure on the hydrodynamic behaviors of a high-density circulating fluidized bed was investigated. The solid circulation rate was up to 321 kg/(m2s) with the circular cross-section under the operating conditions of the main bed air velocity 12.1 m/s and loosen wind and back-feed wind flow 25.1 m3/h. Different operating conditions on realizing high density circulation was analyzed, while both solids circulation rate and particle holdup depended highly on operating conditions. The circulating gas-solid flow was accompanied by an evidently-dense character in the riser's bottom zone and became fully developed in the middle and upper zones.

关 键 词：HDCFB gas-solid flow solids circulation rate 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]