Wireless measurement of Float-Sink motion of Variously-shaped objects in Gas-Solid fluidized bed

Uemoto, Koshi; Narita, Shohei; Harada, Shusaku; Sakamoto, Yuya; Tsuji, Tomohiro; Oshitani, Jun; Kajiwara, Hirokazu; Matsuoka, Kei

doi:10.1016/j.apt.2023.104111

Cited by 4 publications

(1 citation statement)

References 27 publications

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“…These studies showed that immersed objects can have a profound effect on particle distribution and movement, gas flow patterns, and heat transfer within the bed. For example, static internals are often used to enhance mixing, reduce bubble size, and improve heat transfer efficiency, while dynamic elements can induce more complex hydrodynamic behavior [27]. The interaction between these objects and the particulate phase was shown to be critical in optimizing reactor conditions for specific processes, such as combustion [28], gasification [22], and chemical looping [28].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Insights on Floating Bubbling Fluidized Beds: Dynamic Solutions for Mitigating Gas Maldistribution

Sarbanha,

Larachi,

Taghavi

2024

Energies

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This study examined bubbling fluidized beds as an alternative to fixed-bed dry scrubbers on ships for reducing pollutants from marine fuels. It focused on overcoming the challenges of gas maldistribution/slug formation, especially under rough sea conditions. This research departed from traditional methods by introducing mobile internal elements into the bed emulsion phase and investigating their effectiveness in various settings, such as vertical, inclined, and rolling beds. A specialized hexapod-driven bubbling fluidized bed was developed to mimic marine operating conditions and to study the behavior of shipboard fluidized beds. Techniques such as digital image analysis (DIA) and particle image velocimetry (PIV) were used to observe bubble dynamics and granular phases, measuring local void fractions and particle velocities. A key finding is the effectiveness of moving internals in preventing bubble coalescence, which is critical for avoiding wall slugs, at different inclinations. Three types of packing were used as mobile internals: Super Raschig, Pall, and square rings. Super Raschig rings, which are characterized by high porosity, were the most efficient in reducing bubble coalescence, making them a preferred choice for offshore fluidized bed applications. This research contributes to the advancement of fluidized bed technology in marine applications and provides insight for future improvements.

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