Impact of physical properties of particles irradiated by white light on online measurement was explored. The shifting phenomenon of measured particle channels was analyzed based on the Mie scattering theory and thermodynamic principles. The results showed that the particle absorptivity affects the shifting of particle channels, the number of which relies greatly on the particle diameter as well as both the real and imaginary parts of refractive index. The online measurement of the diameters of two absorbing particles (A and B) reveals that the measured values (0.751 and 1.657 μm, respectively) are far smaller than their real counterparts, thus requiring further correction to the preliminary data based on the foregoing theories. Besides, particles of both types strode over multiple particle channels. The newly-corrected diameters of particle A and B transformed to be 1.668 and 2.759 μm, respectively, with an acceptable deviation of 5% as compared to the SEM result of 1.604 and 2.685 μm, which validates the rationality of the theoretical methods adopted here and further corroborates our results.
Lifeng LU Xiaolin WU Xuan SONG Zhongli JI
. Characteristic of Online Measurement for Particles in Gas Pipelines[J]. The Chinese Journal of Process Engineering, 2017
, 17(5)
: 965
-970
.
DOI: 10.12034/j.issn.1009-606X.216370
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