化工学报 ›› 2003, Vol. 54 ›› Issue (11): 1524-1529.

• 多相流 • 上一篇    下一篇

双组分固体颗粒在连续操作的三相床反应器中的轴向浓度分布

林诚; 林春深; 张济宇   

  1. 中国科学院山西煤炭化学研究所,山西 太原 030001;福州大学化学工程技术研究所,福建 福州 350002
  • 出版日期:2003-11-25 发布日期:2003-11-25

AXIAL CONCENTRATION DISTRIBUTION OF BINARY SOLIDS MIXTURES IN THREE-PHASE REACTORS WITH CONTINUOUS OPERATION

LIN Cheng;LIN Chunshen;ZHANG Jiyu   

  • Online:2003-11-25 Published:2003-11-25

摘要: 在一内径为4.2cm、高为150cm的连续操作的三相床反应器中对双组分固体颗粒的轴向浓度分布进行了实验研究. 实验用的固体混合物物料一组为粒径不同的联二脲颗粒,另一组为润湿性不同的联二脲与发泡剂ADC颗粒的混合物.为描述不同特性的颗粒浓度在床内的轴向分布,提出了修正的沉降分散模型.模型计算值能很好地拟合实验数据.

关键词: 三相流化床, 连续操作, 二元组分, 固体颗粒轴向浓度分布, 沉降分散模型

Abstract: Experiments were made on axial concentration distribution of binary solids mixtures in a three-phase fluidized bed of 4.2cm I.D. and 150 cm height under continuous operation mode. Biurea particles with different diameters and a mixture of biurea and blowing agent ADC with different wettability were used in the experiments.One-dimensional sedimentation-dispersion model was modified by taking into consideration of the effects of both particle size and wettability on particle settling velocity to describe the axial concentration distribution of each solids component. Agreement between experimental and model predicted data is satisfactory.

Key words: 三相流化床, 连续操作, 二元组分, 固体颗粒轴向浓度分布, 沉降分散模型