Experiment Investigation on Concentration and Mass Flow Measurement of Pulverized Coal Using Electrical Capacitance Tomography
Accurate measurement of the concentration of pulverized coal in various pipes plays a key role in assuring safe and economic operation in a pulverized coal-fired boiler in the process of combustion. In this paper, experimental studies are implemented on the measurement of a lean mass flow in a pneumatic conveying pipeline using electrical capacitance tomography (ECT). In this system, a cyclone separator is employed, where the sensors are placed, in order to compensate the inhomogeneity of the sensor sensitivity. The mass flow rate is determined from the solids velocity and the volumetric concentration. The former is measured by cross-correlating the capacitance fluctuations caused by the conveyed solids, and the latter by an image reconstruction method, and then this two parameters are combined to give the solids mass flow rate. The distribution of void fraction in radial direction, the average void fraction and the wavy characteristics are analyzed. The feasibility and reliability of the method are verified by the experimental results.
Mass flow measurement Cross-correlation Void fraction Electrical capacitance tomography (ECT) Pulverized coal concentration
J.Liu M.Sun X.Y.Wang S.Liu
School of Civil Engineering, Henan Polytechnic University, China Institute of Engineering Thermophys Institute of Engineering Thermophysics, Chinese Academy of Sciences, China
国际会议
西安
英文
252-257
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）