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›› 2001, Vol. 1 ›› Issue (2): 0-0.

• 2 •    

脉冲式密相气力输送水平管中的料栓行为

郭艳，易江林，金涌，俞芷青   

  1. 清华大学化工系，北京100084
  • 出版日期:2001-04-20 发布日期:2001-04-20

Behavior of the Gas-granule Plug Flow along a Horizontal Pipeline

GUO Yan, YI Jiang-lin, JIN Yong, YU Zhi-qing   

  1. Dept. of Chem. Eng., Tsinghua University, Beijing 100084, China
  • Online:2001-04-20 Published:2001-04-20

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被引次数

10

摘要： 探讨了聚丙烯颗粒在脉冲式密相气力输送水平管中的料栓行为. 结果表明在一定操作气速下，料栓的长短变化有规律，料栓的运动速度随其长度而变；栓长为1 m左右的聚丙烯颗粒由栓状流向沙丘流型转变的料气速度之比为0.7~0.8，出现在操作气速5 m/s左右；单个料栓的压力梯度与其长度有关，沿单个料栓的压力梯度和截面固含量随气速而变；料栓压降与操作气速无关.

关键词: 脉冲式密相气力输送, 料栓, 流动方式, 压降, 聚丙烯颗粒

Abstract: The investigation on the horizontal plug flow of polypropylene granules was conducted in a dense-phase pneumatic conveying system with pipeline of 50 mm in diameter, 11 m of vertical section and 19 m of horizontal section. The mini-pressure drop sensor and solid pipeline section concentration detector were used. It is found that the length of plug moving in the pipeline changes with time. The profiles of cross-sectional solid average concentration and pressure gradient along plugs vary with the gas velocity. The pressure drop across the plug is proportional to the square of plug length and independent of the gas velocity.

Key words: dense-phase pneumatic conveying, plug, flow pattern, pressure drop, polypropylene granules

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