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›› 2001, Vol. 1 ›› Issue (1): 0-0.

• 1 •    

粘附性颗粒流化床内构件的选型

刘勤, 吕雪松, 李洪钟   

  1. 中国科学院化工冶金研究所多相反应开放实验室,北京100080
  • 出版日期:2001-02-20 发布日期:2001-02-20

Pressure Drop Characteristics of Vertical Dilute-phase Gas Conveying

JING Shan, JIANG Pan-liang, HU Qing-yuan, WANG Jin-fu, JIN Yong   

  1. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Online:2001-02-20 Published:2001-02-20

摘要: 研究了多孔板式内构件和桨叶式内构件对粘附性颗粒流态化的影响. 实验表明,多孔板式内构件对流化质量的改善不好,桨叶式内构件的效果良好但仍然存在缺陷. 通过结合二者优点开发的孔桨式内构件克服了桨叶式内构件的缺点,显著地改善了粘附性颗粒的流化质量.

关键词: 粘附性颗粒流态化, 内构件, 孔桨式, 床层崩裂速度

Abstract: An experimental study of gas conveying of Geldart–D powder in dilute phase through a vertical pipe upwards for 18 m with internal diameter 0.05 m upwards for 18 m was conducted. The pressure drop, choking velocity, minimum fluidized velocity for fluidized bed tank and mass flow rate were measured. The values of fs obtained from the experimental pressure drop in the vertical pipe were the same as those predicted by the correlation presented by Klinzing and Mathur, Yang and Caric. The process of calculating fs also showed that the actual solids velocity, calculated from Eq.2 in the paper, in the conveying pipe was the true value. The experimental results showed that the ratio of pressure gradient along 135° upward bend, 135° downward bend and inclined pipe to the vertical pipe were 1.6, 2.0 and 4.0 respectively.

Key words: Geldart–D particle, gas conveying, dilute phase, pressure drop

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