4.4 Article

Investigation of Bubble Behavior in Gas-Solid Fluidized Beds with Different Gas Distributors

期刊

CHEMICAL ENGINEERING & TECHNOLOGY
卷 44, 期 4, 页码 723-731

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.202000156

关键词

Bubble rise velocities; Bubble size distributions; Computational fluid dynamics simulations; Gas distributors; Gas‐ solid fluidized beds

资金

  1. Deep-sea Biological Resources Program [DY135-B2-15]
  2. China Ocean Mineral Resources Research & Development Program [DY125-15-T-08]
  3. National Natural Science Foundation of China [21176026, 21176242]

向作者/读者索取更多资源

The behavior of gas bubbles in a gas-solid fluidized bed was studied through computational fluid dynamics simulation. Gas bubble size and rise velocity increased with gas velocity. The design of the gas distributor significantly influenced bubble behavior, along with factors such as static bed height and superficial gas velocity.
The behavior of gas bubbles in a gas-solid fluidized bed was investigated by computational fluid dynamics simulation. A two-phase flow model incorporating the kinetic theory of granular flow was used to study the effect of gas distributor design on the size distribution and the rise velocity of gas bubbles in the bed column. The experiments were conducted on four gas distributors with different orifice sizes and pitches. The geometry of the gas distributor had a significant influence on the bubble behavior in the gas-solid fluidized bed. The effects of static bed height and superficial gas velocity were also considered. Bubble diameter and bubble rise velocity increased with gas velocity. However, at low bed height, the deviation in bubble size was indistinct because at higher gas velocity the rising tendency of the bubble formed just above the gas distributor increased and the probability of bubble coalescence decreased.

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