NDLI: Experimental Study of Entrainment and Mixing of Renewable Active Particles in Fluidized Beds

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Experimental Study of Entrainment and Mixing of Renewable Active Particles in Fluidized Beds

Content Provider	MDPI
Author	Szucs, Botond Alagha, Mohamed Sobhi Szentannai, Pal
Copyright Year	2020
Description	Fluidized bed combustors were initially designed and built basically for the utilization of fossil fuels, mostly coal. The actual worldwide trend of transitioning from fossil fuels to renewables requires sufficient knowledge on the fluid mechanics of these new particle types because of the significant differences in their shapes, sizes, densities, and homogeneities. This article presents experimental results on the particle entrainment and mixing of some industrially relevant fuels such as solid refused fuel/refuse derived fuel (SRF/RDF), bark, sunflower shell, and wheat shell. The measurements were performed on a lab-scale fluidized bed experimental facility. The results show that sunflower shell is entrained in the highest degree; however, at very low velocity, the entrainment of wheat shell is the most intensive. The entrainment behaviors of the investigated SRF and bark samples are similar. On the other hand, the mixing results showed that the SRF has relatively high mass fractions in the bottom and centeral regions of the fluidized bed at low superficial velocities, while at elevated velocities, the entire mass of this fuel is shifted upwards. Interestingly, just the opposite tendency can be observed in cases of all other investigated biomass fuels. Finally, the nonspherical renewable active particles have markedly higher concentrations in the bottom region of the bed compared to spherical ones.
Starting Page	4268
e-ISSN	20763417
DOI	10.3390/app10124268
Journal	Applied Sciences
Issue Number	12
Volume Number	10
Language	English
Publisher	MDPI
Publisher Date	2020-06-22
Access Restriction	Open
Subject Keyword	Applied Sciences Applied Chemistry Fluidized Bed Srf/rdf Bark Sunflower Shell Wheat Shell Entrainment Mixing Renewable Fuel Active Particle
Content Type	Text
Resource Type	Article

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