光纤法测量气-固两相流中的固含率  

Measurement of Solid Holdup in Gas-Solid Flow Using Optical Fiber Probe

作　　者：张同旺[1] 何广湘[2] 朱丙田[1] 刘凌涛[1] 韩颖[1] 刘马林[3] 靳海波[2] ZHANG Tongwang;HE Guangxiang;ZHU Bingtian;LIU Lingtao;HAN Ying;LIU Malin;JIN Haibo(Research Institute of Petroleum Processing,SINOPEC,Beijing 100083,China;College of Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]中国石化石油化工科学研究院,北京100083 [2]北京石油化工学院化学工程学院,北京102617 [3]清华大学核能与新能源技术研究院,北京100084

出　　处：《石油学报（石油加工）》2019年第2期268-274,M0004,共8页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金重大研究计划项目(91634101);北京市属高校高水平教师队伍建设支持计划高水平创新团队建设计划项目(IDHT20180508)资助

摘　　要：基于光线照射到颗粒上会发生漫反射这一现象,制作了一种测量气-固两相流中固含率的单光纤探针。对于自由堆积的催化剂颗粒,信号强度随催化剂与探针末端距离的减少而增加。对于其他物体,信号强度随物体与光纤距离的减少先增加后降低,在约1 mm处有极大值。采用板状单摆考察光纤探针对运动物体响应的灵敏性和准确性,实验结果与计算结果一致。分别用压差法和光纤法测量流化床中的固含率并进行比较,固含率较高时,压差法与光纤法的固含率基本相当;受颗粒间遮挡的影响,当固含率较低时,光纤法测得的固含率偏高。提供了一种一定范围内气-固两相流固含率的在线测量方法及原理,丰富了多相流测量理论和实践体系。A single optical fiber probe,which is used to measure solid holdup in a gas-solid two-phase flow,was developed based on the phenomenon of light diffusive reflection on solid particles.For stacked catalyst particles,the signal intensity increases with the decrease of distance from probe tip to catalyst.For other objects,however,the signal intensity usually increases when the probe is close to the objects and reaches maximum when the above distance is about 1 mm;then the intensity declines as the distance from the probe to the objects goes down.With using a plate pendulum,sensitivity and accuracy of the optical fiber probe for moving objects were investigated,and it was found that experimental results are consistent with theoretical calculation.In addition,the solid holdup in a gas-solid two-phase fluidized bed was measured,and the results from the pressure difference method and the optical fiber method were compared with each other.The above results suggest that the solid holdup obtained from the two methods agree well with each other when solid holdup is high.However,when solid holdup is low,values obtained from optical probe are slightly higher than those from pressure difference method.This work proposes a new method and principle for on-line measurement of solid holdup for a certain concentration range in gas-solid flow,and thus enriches the theory and application of multiphase flow measurement.

关 键 词：气-固流化床 固含率 光纤探针 单摆 

分 类 号：TQ021.1[化学工程]