EFFECT OF FLUIDIZING PARTICLE ON DRYING CHARACTERISTICS OF POROUS MATERIAL IN FLUIDIZED BED
EFFECT OF FLUIDIZING PARTICLE ON DRYING CHARACTERISTICS OF POROUS MATERIAL IN FLUIDIZED BED
复制标题
流化颗粒对流化床多孔材料干燥特性的影响
DOI：
10.1081/drt-100105290
复制
发表时间：
2001
影响因子：
3.3
通讯作者：
M. Nakamura
中科院分区：
文献类型：
--
作者：
Y. Tatemoto;Y. Bando;K. Yasuda;Y. Senda;M. Nakamura
对多孔物料在流化床中的干燥特性进行了理论和实验研究。以砖球为试样，将其浸入流化床中。玻璃珠被用作流化颗粒，并且改变颗粒直径。当样品孔径较大时，流化颗粒粘附在样品表面。在理论分析中，考虑了粘附颗粒层中的传热和传质。流化颗粒在干燥初期粘附在样品表面。随着附着颗粒质量的减少，样品温度大大降低。计算结果与实验数据吻合较好。流化颗粒粒径对干燥时间的影响较小。干燥气体温度的过度增加几乎不会有助于缩短干燥时间。
The drying characteristics of porous material in fluidized bed were examined theoretically and experimentally. The brick ball was used as the sample and immersed in the fluidized bed. The glass beads were used as the fluidizing particles and the particle diameters were changed. When the pore diameter of sample was relatively large, the fluidizing particles were adhered on the sample surface. In the theoretical analysis, the heat and mass transfers in adhered particle layer were considered. The fluidizing particles were adhered on the sample surface during the earlier period of drying. The sample temperature largely decreased when the mass of adhered particle decreased. The calculated results are in good agreement with experimental data. The diameter of fluidizing particle had a small effect on the drying time. The excess increments in drying gas temperature hardly contributed to shortening the drying time.