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Flow dynamics and contact efficiency in a novel fast-turbulent fluidized bed with ring-feeder internals 被引量:3
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作者 Qiang Geng Ping Wang +2 位作者 Xiaolin Zhu Xinghua You Chunyi Li 《Particuology》 SCIE EI CAS CSCD 2015年第4期203-211,共9页
The flow dynamics in a novel fast-turbulent fluidized bed (FTFB) with middle-upper expanding structure and two different ring-feeder internals (mixed and vortex ring-feeder) were studied to achieve a reduction in ... The flow dynamics in a novel fast-turbulent fluidized bed (FTFB) with middle-upper expanding structure and two different ring-feeder internals (mixed and vortex ring-feeder) were studied to achieve a reduction in gasoline olefin production, Compared with a conventional circulating fluidized bed, the novel FTFB displayed unique characteristics and advantages. A higher solids holdup and more uniform solids holdup distribution existed in the diameter-expanding region, especially for the FTFB with vortex ring-feeder structure, A probability density distribution analysis indicated that the novel fluidized bed could reduce gas-solids segregation and enhance gas-solids interaction. A constant carbon dioxide tracer system was used to simulate the reactant gas distribution. The gas-solids contact efficiency was defined according to the solid dispersibility and the amount of gas covering the solid surface. Novel FTFB risers, especially those with vortex ring-feeders, have a much higher gas-solids contact efficiency than that of traditional risers. 展开更多
关键词 Flow dynamics Fast-turbulent fluidized bed Ring-feeder internal carbon dioxide tracer Gas-solids contact efficiency
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