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Fluidization of cylinder particles in a fluidized bed
Advanced Powder Technology, 2017Abstract An experimental study of the flow regimes and transitions in a fluidized bed (cross-section of 200 mm × 200 mm and height of 2000 mm) containing a mixture of cylindrical particles and silica sand is carried out. Six different flow regimes are identified: fixed bed (F), bubbling fluidization (B), transition fluidization (T), partial ...
Xi Chen +2 more
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On partial fluidization in rotating fluidized beds
AIChE Journal, 1987In a rotating fluidized bed, unlike in a conventional fluidized bed, the granules are fluidized layer by layer from the (inner) free surface outward at increasing radius as the gas velocity is increased. This is a very significant and interesting phenomenon and is extremely important in the design of these fluidized beds.
J. Kao, R. Pfeffer, G. I. Tardos
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The development of fluidized bed combustion
Environmental Science & Technology, 1980Technical feature:The development of fluidized-bed combustion (FBC) technology in the U.K. during the 1960's and beyond is reported. FBC technology was developed to reduce the capital costs of coal combustion and to facilitate the efficient use of lower grade coal. The status of operating FBC boilers in the U.K. is examined.
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Nonlinear Instabilities in Fluidized Beds
Annals of the New York Academy of Sciences, 1983Abstract The interpretation of linear instabilities of voidage disturbances in fluidized beds (ref. 12) is reviewed and the natural extension to nonlinear instabilities presented in the light of interpretation of observations (refs. 9, 10). The role of the constitutive relations in the analysis is also discussed.
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Fluidized bed membrane reactors
2014Fluidized bed membrane reactors are an extension or an improvement of a packed bed membrane reactor. The fluidized bed configuration allows a more uniform temperature due to the movement of particles even for very exothermic reactions and decreased concentration polarization.
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Fluidization Phenomena and Fluidized Bed Technology
1997The term fluidization is used to designate the gas-solid contacting process in which a bed of finely divided solid particles is lifted and agitated by a rising stream of process gas. At the lower end of the velocity range, the amount of lifting is slight, the bed behaving like a boiling liquid (hence the term boiling bed).
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FLUIDIZED-BED PYROLYSIS OF GLUCOMANNAN
2013The pyrolysis of particles of glucomannan, the main component of softwood hemicelluloses, is investigated in a fluidized-bed reactor. A first set of experiments is carried out for temperatures in the range 530-690K to determine yields and composition of products. The most abundant are char, water and carbon dioxide.
C Branca, A Galgano, C Di Blasi
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2020
Very vigorous mixing of the fluidized particles takes place just the distributor, and heat and mass can be exchanged very effectively between particles and the fluidizing gas because of the large surface area of the particles. The gas fluid bed is characterized by having good heat transfer properties between the fluidized layer and heating or cooling ...
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Very vigorous mixing of the fluidized particles takes place just the distributor, and heat and mass can be exchanged very effectively between particles and the fluidizing gas because of the large surface area of the particles. The gas fluid bed is characterized by having good heat transfer properties between the fluidized layer and heating or cooling ...
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2013
The chapter describes the state-of-the-art of fluidized bed gasification of solid fuels, starting from the key role played by hydrodynamics, and its strong correlation with physical and chemical phenomena of the process and operating performance parameters of the reactor.
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The chapter describes the state-of-the-art of fluidized bed gasification of solid fuels, starting from the key role played by hydrodynamics, and its strong correlation with physical and chemical phenomena of the process and operating performance parameters of the reactor.
openaire +2 more sources