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Full-Text Articles in Engineering
Study Of The Minimum Spouting Velocity In A Draft Tube Conical Spouted Bed, Haritz Altzibar, G. Lopez, M. Olazar, J. Bilbao
Study Of The Minimum Spouting Velocity In A Draft Tube Conical Spouted Bed, Haritz Altzibar, G. Lopez, M. Olazar, J. Bilbao
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
A study has been carried out on the hydrodynamics of conical spouted beds with a non-porous draft-tube. A hydrodynamic correlation has been proposed for calculating the minimum spouting velocity as a function of dimensionless moduli that take into account geometric factors, particle characteristics and operating conditions. A statistical analysis of the data obtained following a design of experiments shows that the inlet diameter, particle diameter and the height of the entrainment zone are the parameter of greater influence on the minimum spouting velocity.
Hydrodynamics Of A Spout-Fluid Bed With An Enlarged Column For Fine Particles, Jian Xu, Lei Gong, Xiaojun Bao Dr., Weisheng Wei
Hydrodynamics Of A Spout-Fluid Bed With An Enlarged Column For Fine Particles, Jian Xu, Lei Gong, Xiaojun Bao Dr., Weisheng Wei
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
In order to improve the spoutability for fine particles, a new type of spout-fluid bed with an enlarged column section was proposed. Comparison of flow regime maps for the new design with a conventional spout-fluid bed showed that the range of stable spouting regime was extended when an enlarged column section was employed.
A Conical Spouted Bed Reactor For The Valorisation Of Waste Tires, Gartzen Lopez, Maider Amutio, Gorka Elordi, Maite Artetxe, Haritz Altzibar, Martin Olazar
A Conical Spouted Bed Reactor For The Valorisation Of Waste Tires, Gartzen Lopez, Maider Amutio, Gorka Elordi, Maite Artetxe, Haritz Altzibar, Martin Olazar
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
A pilot plant provided with a conical spouted bed reactor has been used for the valorisation of waste tires by thermal pyrolysis in continuous mode. The effect of pyrolysis temperature on product distribution and properties has been studied in the temperature range from 425 to 600 ºC. This variable has proven to have an important effect on product distribution. Thus, pyrolysis oil yield was reduced from 64.3 wt% at 425 ºC to 55.9 wt% at 600 ºC. However, the quality of carbon black was improved operating at high temperatures (increasing BET surface area values). High yields of certain interesting chemicals …
Particle Segregation In Tapered Fluidized Beds, T. M. Gernon, Mark A. Gilbertson, R.S.J. Sparks
Particle Segregation In Tapered Fluidized Beds, T. M. Gernon, Mark A. Gilbertson, R.S.J. Sparks
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
In practical situations, a bed of particles often has a wide range of sizes or is a mixture of differently sized components, and this allows a number of different segregation structures to form depending on local flow conditions. These vary systematically in tapered beds. This paper is an experimental investigation of the interaction between size segregation and the effects on local flows in a tapered bed.
Numerical And Experimental Steady State Flow And Heat Transfer In A Continuous Spouted Bed, Cezar A. Rosa, José T. Freire, Hamid Arastoopour
Numerical And Experimental Steady State Flow And Heat Transfer In A Continuous Spouted Bed, Cezar A. Rosa, José T. Freire, Hamid Arastoopour
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
Experimental measurements on heat transfer and flow properties and CFD simulations based on the two-fluid model (Eulerian-Eulerian approach) were performed in a draft tube continuous spouted bed system. The simulated results on the gas-particle flow patterns and the temperature distribution in the bed agreed well with our experimental data.
Biomass Gasification In Rotating Fluidized Bed, Mania Abdollahi, Christophe Guy, Jamal Chaouki
Biomass Gasification In Rotating Fluidized Bed, Mania Abdollahi, Christophe Guy, Jamal Chaouki
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
A steady-state mathematical model is developed for a rotating fluidized bed gasifier. Integrating reactor hydrodynamics with devolatilization kinetics, char gasification and combustion of both char and gas species; the model is used to present the gas-solid phenomena in novel reactor and investigates the reactor application in gasification processes. Model outputs are compared with experimental and simulation results of existing fluidized bed gasifier. It is observed that for the same equivalence ratio, the gasification process in RFB-SG is improved as a result of improved heat and mass transfer and gas-solid contact.
Film Coating Onto Cohesive Fine Particles By A Novel Rotating Fluidized Bed Coater, Tetsufumi Kondo, Hideya Nakamura, Tomohiro Iwasaki, Satoru Watano, Daisuke Iwamoto
Film Coating Onto Cohesive Fine Particles By A Novel Rotating Fluidized Bed Coater, Tetsufumi Kondo, Hideya Nakamura, Tomohiro Iwasaki, Satoru Watano, Daisuke Iwamoto
The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering
In this study, film coating onto cohesive fine particles was conducted by using a novel rotating fluidized bed coater (RFBC). In order to avoid the formation of agglomeration, baffle plates were equipped inside the RFBC. Coating experiments were conducted under various operating conditions and the coated particles were evaluated based on their physical properties. As a result, coated particles having extremely small degree of agglomeration and favorable prolonged release property of a tracer material could be obtained.