Electrical Capacitance Volume Tomography for Characterization of Gas–Solid Slugging Fluidization with Geldart Group D Particles under High Temperatures,Industrial & Engineering Chemistry Research

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Electrical Capacitance Volume Tomography for Characterization of Gas–Solid Slugging Fluidization with Geldart Group D Particles under High Temperatures
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-02-12 00:00:00 , DOI: 10.1021/acs.iecr.7b04733
Dawei Wang ₁ , Mingyuan Xu ₁ , Qussai Marashdeh ₂ , Benjamin Straiton ₂ , Andrew Tong ₁ , Liang-Shih Fan ₁

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A three-dimensional ECVT sensing technique is applied to imaging complex slugging phenomena of a gas–solid fluidized bed under ambient and elevated temperature conditions. The study indicates that the time interval between rising slugs decreases with an increase in the gas velocity, reaching a nearly steady time interval value of about 1 s between two slugs when the gas velocity is ∼1.7 m/s above the minimum fluidization velocity. The fluidized bed behaves as a bubbling fluidized bed at low gas velocities. In slugging regime, the slug rise velocity increases with the gas velocity. A mechanistic analysis of forces around the dense phase solid particles suggests that the relationship between the slug rise velocity and the gas velocity for the square-nosed slugging bed is not strictly linear and is highly related to the interparticle forces, internal friction of particles, and gas velocity in addition to the wall stress.

中文翻译：

电容体积层析成像技术用于表征高温下使用Geldart D组粒子进行气固混合弹击流化

三维ECVT传感技术用于在环境和高温条件下对气固流化床的复杂团块现象进行成像。研究表明，上升段塞之间的时间间隔随气体速度的增加而减小，当气体速率比最小流化速度高约1.7 m / s时，两个段塞之间的稳定时间间隔值达到约1 s。在低气体速度下，流化床表现为起泡的流化床。在团状状态下，团状上升速度随气体速度而增加。对致密相固体颗粒周围的力进行的机械分析表明，方形鼻塞床的弹头上升速度与气体速度之间的关系不是严格线性的，并且与颗粒间力高度相关，

更新日期：2018-02-12

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