Experimental Investigation on the Translational and Rotational Motion of Biomass Particle in a Spout-Fluid Bed
Experimental Investigation on the Translational and Rotational Motion of Biomass Particle in a Spout-Fluid Bed
复制标题
喷动流化床中生物质颗粒平移和旋转运动的实验研究
DOI：
10.1515/ijcre-2013-0067
复制
发表时间：
2013-08
影响因子：
1.6
通讯作者：
金保昇
中科院分区：
文献类型：
--
作者：
张勇;钟文琪;金保昇
摘要研究了生物质颗粒在喷动流化床中的平移和旋转运动。采用两种不同密度的圆柱形生物质颗粒作为流化床固体颗粒，分别对两种不同密度的圆柱形生物质颗粒进行了流化床试验。引入虚拟粒子浓度和旋转角来描述粒子的平移和旋转特性。将微波加热-红外热成像技术测得的颗粒浓度与计盒法测得的实际颗粒浓度进行了比较。根据温度分布，区分多个示踪剂的平移位置和旋转角度。结果表明，示踪剂的加热特性取决于示踪剂材料。与球形颗粒相比，非球形生物质颗粒更容易在床层中形成死区。在流化流态下，生物质颗粒的流动特性取决于射流速度。颗粒间凝聚力产生的高阻力阻碍了气泡的上升，减弱了颗粒的径向弥散。在喷泉中，均匀的生物质颗粒均匀旋转，而非均匀的生物质颗粒表现出不均匀的旋转。在环隙内，生物质颗粒的旋转特性取决于喷泉结构和颗粒在环隙内的运动轨迹。
Abstract The translational and rotational motions of biomass particle in a spout-fluid bed have been investigated. Two kinds of cylindrical biomass particles with different densities were used as bed solids, which were obtained from the jujube tree. To describe the translational and rotational characteristics, virtual particle concentration and rotation angle were introduced. The former obtained by microwave heating-infrared thermal imaging technique was compared with the actual particle concentration determined by box-counting method. Based on the temperature distribution, the translational position and rotation angle of multiple tracers were distinguished. The results show that the heating characteristic of tracer depends on the tracer material. Compared to the spherical particles, non-spherical biomass particle is more likely to cause dead zone in the bed. In the flow regime of fluidizing, the flow characteristic of biomass particle relies on the jet gas velocity. The high resistance resulting from the interparticle cohesion forces hinders the rise of bubbles and weakens the radial dispersion of particle. In the fountain, homogeneous biomass particle rotates uniformly, while non-homogeneous biomass particle exhibits non-uniform rotation. In the annulus, the rotation characteristic of biomass particle depends on the structure of fountain and particle trajectory in the annulus.
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DOI：
10.1016/j.cep.2008.02.012
发表时间：
2009
期刊：
Chemical Engineering and Processing
影响因子：
--
作者：
Yong Zhang;Baosheng Jin;Wenqi Zhong
通讯作者：
Wenqi Zhong
影响因子：
3.9
作者：
Yong Zhang;Baosheng Jin;Wenqi Zhong;Bing Ren;R. Xiao
通讯作者：
Yong Zhang;Baosheng Jin;Wenqi Zhong;Bing Ren;R. Xiao
DOI：
--
发表时间：
2001
期刊：
Journal of Combustion Science and Technology
影响因子：
--
作者：
Yuan Zhu
通讯作者：
Yuan Zhu
DOI：
--
发表时间：
--
期刊：
--
影响因子：
--
作者：
N. Metropolis
通讯作者：
N. Metropolis
影响因子：
5.2
作者：
J. Plawsky;H. Littman;John D. Paccione
通讯作者：
J. Plawsky;H. Littman;John D. Paccione