Identify the Impact of Flow Pattern on Solid Mixing in Bubbling Fluidization

Yunning Li, Kai Zhang, Xianfeng Fan

Research output: Contribution to conferencePaperpeer-review

Abstract

In this study, we attempted to predict solid and bubble flow patterns in a bubbling fluidized bed based on operational conditions, the air distributor and particle velocity, and investigated the impact of flow pattern on solid mixing behaviour. The solid mixing behaviour was estimated based on the dispersion coefficient of particles, the active index (AI), and the distribution of particle residence time within the entire bed. It was found that the flow patterns are a result of a combination of operational conditions, properties of bed materials, and bed designs. A ‘Flow Pattern Parameter (FPP)’ was proposed to identify the solid flow pattern in a bubbling fluidized bed. Different flow pattern corresponds to a certain range of the Flow Pattern Parameter. The particle dispersion coefficient, AI, and the distribution of particle residence time clearly agree with solid flow patterns and bubbling behavior within the beds.

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