EXPERIMENTAL STUDY ON PARTICLE FEEDING AND MIXING IN THE BOTTOM ZONE OF A CIRCULATING FLUIDIZED BED
mixing behaviors of the feeding particles in the bottom zone of a circulating fluidized bed with a rectangular cross-section of 0.3 m×0.2 m and a height of 2 m were investigated by monitoring transient pressure drop and thermal tracing method. The effects of the feeding particle size, feeding port location (relative to dense bed surface), feeding gas velocity and fluidization gas velocity were examined. The bed collapse technique was also used to examine the lateral distribution of the feeding particles for four typical cases to give reference results. Results show that the mixing behaviors are greatly dependent on particle size. Under the condition that the feeding port is fully submerged in the dense bed, a hot spot occurs as the feeding gas velocity is no more than 0.24m/s. Increase in feeding gas velocity and fluidization gas velocity can both promote the mixing of the feeding particles with bed material.
particle feeding solids mizing thermal tracing technique bed collapse technique
X.P.Chen D.Y.Liu Z.D.Chen C.S.Zhao
School of Energy and Environment, Southeast University, Nanjing, 210096, China
国际会议
第20届国际流化床燃烧会议(20th International Conference on Fluidized Bed Combustion)
西安
英文
324-329
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）