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在底部直径为120 mm的锥型流化床中,以玻璃珠为流化颗粒,过热蒸汽为流化介质,研究了固体颗粒在过热蒸汽流化床中的流化特性,考察了操作温度和压力对临界流化速度(umf)的影响。结果表明,过热蒸汽流化床的流化行为与热空气相似,临界流化速度(umf)随床层温度的升高而减小,随床内压力的增大而减小;在相同温度条件下,过热蒸汽流化床的临界流化速度比热空气大。
In a cone-shaped fluidized bed with a bottom diameter of 120 mm, the fluidized characteristics of solid particles in a superheated steam fluidized bed were investigated using glass beads as the fluidized particles and superheated steam as the fluidizing medium. The effects of operating temperature and Effect of pressure on critical fluidization velocity (umf). The results show that the fluidization behavior of superheated steam fluidized bed is similar to that of hot air. The critical fluidization velocity (umf) decreases with the increase of bed temperature and decreases with the increase of bed pressure. Under the same temperature condition , The critical fluidization velocity of superheated steam fluidized bed is greater than that of hot air.