南京师范大学学报（工程技术版）Issue(4)：25-30,6.
气-液-固三相流化床冷态实验
Cold Model Experiment of Gas-Liquid-Solid Three-Phase Fluidized Bed
摘要
Abstract
A gas-liquid-solid three-phase fluidized bed with inner diameter of 50 mm and height of 500 mm is established by using nitrogen as gas phase, distilled water as liquid phase and copper powder as solid phase. Pressure fluctuation signals obtained in the region upon the gas distributor are analyzed by Hilbert-Huang Transform method. The effects of gas flow rate on gas distributor pressure drop and differential pressure between two fixed measure points are studied. Minimum fluidization velocity of the three-phase fluidized bed is obtained from cold model experiments and further confirmed by high speed photography. The results show that solid particles strike each other violently with the gas flow rate of 14. 85 mm/s. Gas phase,liquid phase and solid phase mixes well under such gas flow rate. With the increase in gas flow rate,differential pressure between two fixed measure points decreases at first,and then increases,and decreases at last. The minimum fluidization velocity of the three phase fluidized bed is determined as 17. 4 mm/s and finally is verified by high synchronous image acquisition.关键词
三相流化床/压力脉动信号/最小流化速度Key words
three-phase fluidized bed/pressure fluctuation signal/minimum fluidization velocity分类
化学化工引用本文复制引用
张居兵,李雅宁,钱舒琳,杨宏旻,朴桂林..气-液-固三相流化床冷态实验[J].南京师范大学学报（工程技术版）,2014,(4):25-30,6.基金项目
江苏省高校自然科学基金(12KJB480006)、江苏省自然科学基金(BK2012851) （12KJB480006）
