Correction of Gas-Phase Velocity Effects on Ultrasonic Measurement of Pulverized-Coal Concentration

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhang, Zhenghua^1 ; Wang, Peihong^1

School of Energy and Environment, Southeast University, Nanjing

210096, China^1

关键词: Acoustic attenuation;    Experimental platform;    Gas phase velocity;    Gas solid two phase flow;    Pulverized coal concentration;    Single-phase flow;    Solid-phase concentration;    Ultrasonic methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/5/052153/pdf
DOI  :  10.1088/1755-1315/252/5/052153

来源: IOP

【 摘 要 】

The ultrasonic method generally calculates the acoustic attenuation coefficient of gas-solid two-phase flow based on gas single-phase flow at a certain velocity to get the concentration of solid phase. The changes of gas phase velocity have effects on acoustic attenuation coefficient and the measurement results of solid phase concentration. The paper analysed the principle of this effects, built experimental platform, and a modified formula of gas phase velocity based on the experimental samples was given. The experiment test results indicated that the measurement absolute error of the pulverized-coal concentration was reduced to about 0.7%.