密相气力输送煤粉颗粒速度静电互相关测量方法

Electrostatic Cross-correlation Measuring Method for Dense-phase Pneumatically Conveyed Coal Particle Velocity

介绍了静电传感器及相关法速度测量原理，并在内径为10mm的加压密相气力输送系统上，对相关速度测量系统进行了实验研究．结果表明：浓相气力输送不稳定性，导致颗粒相关速度测量值有较大的波动性；颗粒浓度在5．2％～14．1％，气体表观速度在0．5—7m／s时，系统的重复性优于10％．

The fundamental measurement theory of an electrostatic sensor and cross-correlation method are introduced. The correlated velocity measurement systems are analyzed in a 10mm bore horizontal section of a dense-phase pneumatic conveying system. Experimental results obtained demonstrate that the dense-phase pneumatic conveying is of instability, leading to the considerable fluctuation of particle velocities, and the repeatability is better than 10 % under given experimental conditions of a superficial air velocity range of 0.5 - 7 m/s for a particle concentration 5.2 - 14.1%.