A hydrodynamic model of loop seal with a fluidized standpipe for a circulating fluidized bed  

作　　者：Changjin Li Zheng ZOU Hongzhong Li Qingshan Zhu 

机构地区：[1]State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China [2]University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Particuology》2018年第1期50-58,共9页颗粒学报（英文版）

基　　金：The authors wish to gratefully acknowledge the financial sup- port from the State Key Development Program for Basic Research of China （973 Program） under Grant No. 2015CB251402 and from the National Natural Science Foundation of China under Grant Nos. 21325628 and 91334108.

摘　　要：Loop seals are among the most common non-mechanical valves used in circulating fluidized bed sys- tems. In the present work. a fundamental study is conducted of a fluidized loop seal, which consists of a fluidized standpipe, a fluidized supply chamber, and a fluidized recycling chamber. Based on the princi- ples of momentum, mass. and energy conservation, a hydrodynamic model for a loop seal is established, consisting of 13 equations. The effects of operating conditions such as the bottom aeration rate, total solid inventory, and fluidizing gas velocity in the riser on the solids flow rate and the performance of the loop seal are studied by a combination of model analysis and experiments. The experiments are carried out in a circulating fluidized bed with silica gel particles （Geldart group A）. The model predictions show good agreement with the experimental data.Loop seals are among the most common non-mechanical valves used in circulating fluidized bed sys- tems. In the present work. a fundamental study is conducted of a fluidized loop seal, which consists of a fluidized standpipe, a fluidized supply chamber, and a fluidized recycling chamber. Based on the princi- ples of momentum, mass. and energy conservation, a hydrodynamic model for a loop seal is established, consisting of 13 equations. The effects of operating conditions such as the bottom aeration rate, total solid inventory, and fluidizing gas velocity in the riser on the solids flow rate and the performance of the loop seal are studied by a combination of model analysis and experiments. The experiments are carried out in a circulating fluidized bed with silica gel particles （Geldart group A）. The model predictions show good agreement with the experimental data.

关 键 词：Circulating fluidized bed Loop seal Hydrodynamic model 

分 类 号：TU991.342[建筑科学—市政工程] TV131.2[水利工程—水力学及河流动力学]