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›› 2003, Vol. 3 ›› Issue (3): 0-0.

• 3 •    

循环悬浮床内气固两相流动优化的实验研究

王翠苹,杨烨,李定凯,吕子安   

  1. 清华大学热能工程系煤的清洁燃烧技术国家重点实验室,北京 100084
  • 出版日期:2003-06-20 发布日期:2003-06-20

Experiment of Optimizing Gas–Particle Flow Regime in the Square-section Circulating Suspension Bed

WANG Cui-ping, YANG Ye, LI Ding-kai, LU Zi-an   

  1. Dept. Therm. Eng., State Key Lab. Clean Combustion of Coal, Tsinghua University, Beijing 100084, China
  • Online:2003-06-20 Published:2003-06-20

摘要: 在截面尺寸为400 mm?400 mm的方形截面循环悬浮床冷态实验台架上,以空气为流化介质,平均粒径40 ?m的玻璃粉为循环物料,采用双光路光纤密度探头,测量了颗粒浓度随床底部进气结构、顶部结构和内构件等几何结构的不同而变化的规律;在改变表观气速和循环流率等操作参数的情况下测量了床内颗粒浓度的分布;根据部分测量结果分析了这些因素对边角处颗粒回流效应的影响. 结果表明,优化几何结构和选取合理的操作参数都可以提高烟气脱硫循环悬浮床内气固接触反应的脱硫效率.

关键词: 循环悬浮床, 进气结构, 顶部帽腔, 内构件, 操作参数

Abstract: In order to develop the advanced flue gas desulphurization (FGD) technology, a cold circulating suspension bed facility with a cross section of 400 mm′400 mm was built. Air and glass granules with a mean diameter of 40 mm were used in experiment. A dual-optic density probe was used to measure the particle concentration and distribution changes with bed parameters, such as air jet entrance at the bed bottom, top structure and inner structure, superficial air velocity, circulating flow rate. The influence of some factors on the wall and corner particle back-flow was analyzed too. The experimental results show that it is necessary to optimize the geometrical configuration and choose suitable working parameters of the circulating suspension bed to improve desulphurization efficiency.

Key words: circulating suspension bed, air jet entrance structure, top hat-chamber, inner structure, working parameters

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