Abstract: Experiments on the dynamics of fast fluidization were carried out in a 100mm-diameter plexiglas column, 8 meters in height, on FCC catalyst, alumina powder, iron ore concentrate and fine pyrites cinder. Based on the rapid formation and dissolution of dense strands or clusters of solids dispersed in a continuum of dilute phase, a physical flow model of fast fluidization has been proposed leading to a first-order differatial equation, the solution of which yields a four-parameter equation of voidage distribution along the bed height z The integrated average voidage e throughout the whole bed height may be calculated by the following formula It has been found that computed values are in good agreement with those determined experimentally.

摘要： 在外径100mm,高8m的有机玻璃的装置上,对FCC催化剂、三氧化二铝粉料、铁精矿和细粒黄铁矿烧渣进行了快速流态化的流动实验。基于分布在稀薄连续相中颗粒密集体的不断形成和解体的现象,提出了快速流态化的分相流动的物理模型,并用一个一阶微分方程加以描述。其解为 In((ε-ε_a)/(ε-ε))=-(z-z_i)/Z_o 四个模型参数,即ε_a、ε、Z_o、和z_i由实验确定。