Concentration and angular velocity measurement in a cyclone separator dipleg using electrical capacitance tomography  

作　　者：SUN Meng LIU Shi LEI Jing LI ZhiHong 

机构地区：[1]Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100080, China [2]School of Energy & Power Engineering, North China Electric Power University, Beijing 102206, China

出　　处：《Chinese Science Bulletin》2008年第17期2724-2728,共5页

基　　金：the National Natural Science Foundation of China (Grant Nos. 60672151 and 50736002)

摘　　要：Cyclone separator is one of the main parts of the circulating fluidized bed (CFB) boiler. The separation efficiency of the cyclone separator is very important to the whole boiler. Electrical capacitance tomography (ECT) is a unique measuring technique with great potential in multiphase flow measurement. Experimental studies are carried out on the measurement of volumetric concentration and angular velocity using ECT. The former is determined through image reconstruction method, and the latter is measured by cross-correlating the capacitance fluctuations caused by the conveyed solids. The distribution of void fraction in radial direction, the fluctuating characteristics, probability density function and the spectrum characteristics are analyzed. The feasibility and reliability of the method are verified by experimental results.Cyclone separator is one of the main parts of the circulating fluidized bed （CFB） boiler. The separation efficiency of the cyclone separator is very important to the whole boiler. Electrical capacitance tomography （ECT） is a unique measuring technique with great potential in multiphase flow measurement. Experimental studies are carried out on the measurement of volumetric concentration and angular velocity using ECT. The former is determined through image reconstruction method, and the latter is measured by cross-correlating the capacitance fluctuations caused by the conveyed solids. The distribution of void fraction in radial direction, the fluctuating characteristics, probability density function and the spectrum characteristics are analyzed. The feasibility and reliability of the method are verified by experimental results.

关 键 词：电容X线断层摄影术 浓度测量 角速度测量 除尘器 气固两相流 

分 类 号：X701.2[环境科学与工程—环境工程]