旋风分离器料腿中颗粒浓度及切向速度的电容层析成像测量  

Concentration and Angular Velocity Measurement in the Dipleg of a Cyclone Separator Using ECT

作　　者：孙猛[1] 刘石[2] 雷兢[1] 刘靖[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080 [2]华北电力大学能源与动力工程学院,北京102206

出　　处：《应用基础与工程科学学报》2008年第5期757-762,共6页Journal of Basic Science and Engineering

基　　金：国家自然科学基金(60672151);国家自然科学基金重点资助项目(60532020)

摘　　要：旋风分离器是循环流化床锅炉的主要组成部分,其分离效率是影响整个锅炉的重要因素之一.采用电容层析成像技术(ECT),对旋风分离器料腿中的颗粒体积浓度进行测量;并通过同层传感器相邻电极之间的相关计算得出切向旋转速度.通过对截面浓度分布、电容信号的波动特性及其概率密度和频率特性的分析证明了这种测试方法的可行性及可靠性.Cyclone separator is one of the main parts of circulating fluidized bed separation efficiency of the cyclone separator is Experimental studies are carried out on the volumetric very important to （CFB） boiler. The the whole boiler. concentration and angular velocity electrical capacitance tomography （ECT）. The former is determined through using image reconstruction method, and the latter is measured by cross-correlating the capacitance fluctuations caused by the conveyed solids. The distribution of volume concentration 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：电容层析成像 浓度测量 速度测量 旋风分离器 气固两相流 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]