Abstract: Radial profiles of local gas and solid holdups and liquid interstitial velocities are measured in a large-diameter three-phase fluidized bed, and systematic studies are based on a comparison with data obtained in small-diame-ter fluidized beds. It is shown that radial profiles of gas holdup conform to the parabolic form equation. The distributions of solid particles holdup may be expressed by Eq. (7).Liquid velocities are well described by the modified circulating flow model.

摘要： 本文对大直径三相流化床的局部气含率(?)固含率及液体缝隙速度进行了测定,并结合小直径床的数据作了系统的分析.结果表明,局部气含率基本符合抛物线分布;局部固含率可以由方程式(7)来表示;利用本文修正的液体循环流模型能够合理地描述液速分布.