流動層式PM2.5除去装置のCFD-DEMシミュレーションと運転条件の影響

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  • CFD-DEM simulation of fluidized bed type PM2.5 removal device to investigate the effects of operating conditions

抄録

<p>Highly efficient PM2.5 filtration has been obtained experimentally using a fluidized bed. In this work, a CFD–DEM simulation was conducted to investigate the effects of operating conditions. A high collection efficiency is reproduced for small PM, whose diameter is less than 20 μm, and superficial velocity of 0.3–0.6 m/s. Most PM is captured by adhesion in the bottom several mm layer of bed particles, where the void fraction is low. The adhesion force between PM and bed particle is the dominant force among forces acting on PM, and the drag force can be negligible in this system. It stabilizes the captured PM on the bed particle, and captured PM moves with the bed particle in this system even at highly superficial velocity of 0.6 m/s. On the other hand, the repulsive force between PM and bed particle becomes dominant for PM diameter above 40 μm, and the most of PM cannot be filtrated.</p>

収録刊行物

  • 年次大会

    年次大会 2020 (0), S05421-, 2020

    一般社団法人 日本機械学会

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