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化工学报  2015 

循环流化床提升管T形弯头动态压力的小波分析

DOI: 10.11949/j.issn.0438-1157.20141535, PP. 1697-1703

Keywords: 循环流化床,提升管,T形弯头,动态压力,小波分析,催化剂,两相流

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Abstract:

针对循环流化床提升管出口T形弯头,以FCC催化剂颗粒为物料,采用动态压力传感器,对T形弯头内的气固两相流的动态压力进行了实验测量,以此分析T形弯头内动态压力的特性。实验结果表明,由于在T形弯头盲管处颗粒折返造成的冲击,形成了一个压力脉动源。小波分析表明T形弯头处的压力脉动主频来自盲管内,而次频能量所占比例随着颗粒质量流率增加而加大。T形弯头内的动态压力的标准偏差与颗粒质量流率呈线性关系,可以用于表征循环流化床内的颗粒质量流率。

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