THE EFFECT OF JETTING GAS VELOCITY ON PARTICLE VELOCITIES IN A TWO-DIMENSIONAL JETTING FLUIDIZED BED UNDER PRESSURE

摘要：

　　An optic fiber probe system was employed to investigate the profiles of vertical particle velocities in the outer regions close to the wall of a pressurized jetting fluidized bed.The influence of jetting gas velocity on the particle behavior has been systematically studied.A two-dimensional cold mode of a jetting fluidized bed coal gasifier, of 300 mm × 30 mm cross section was operated at pressures both 0.7 and 1.6 MPa and at high excess fluidizing gas velocity in the range of 0.20 to 0.40 m/s.The bed material was polystyrene with a mean particle diameter of 1.32 mm.The vertical local particle velocity (Vp) gradually accelerates with jetting gas velocity at high bed level.However, at low bed height level, Vp first increases and then is nearly constant at 0.7 MPa and gradually increases (maximum value about 0.63 m/s) at 1.6 MPa.

作者: Junguo Li Zhonghu Cheng Yitian Fang Wei Nie

作者单位: Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China

会议类型: 国际会议

会议名称: The 11th International Conference on Fluidized Bed Technology(CFB-11)(第十一届流化床技术国际会议)

会议地点: 北京

会议语种:英文

页码: 245-249

在线出版日期: 2014-05-14（万方平台首次上网日期，不代表论文的发表时间）