Experimental study on coupling relation between effervescent atomization droplet size and particle size of dust in confined space

doi:10.16265/j.cnki.issn1003-3033.2017.03.023

Abstract

Abstract: A coupling experiment system was constructed with air and water as working fluid in confined space in order to reveal size coupling rule between droplet and fine particle. The airflow disturbance was simulated by using an Spraytec grain-size analyzer and an effervescent atomizing nozzle( the type of inner gas and external liquid ) under different conditions, which the relationships between dust removal efficiency and both dust particle size and droplet size were studied. Gompertz and Parabola functions were respectively established between ALR (ratio of air to liquid), droplet size (X_NS)and total dust removal efficiency(η) by numerical fitting.Gompertz functions were respectively established between ALR, X_NS, and η,η_{2 μm},η_{2-5 μm},η_{5-10 μm},η_{＞10 μm}. The best ALR range (0.4～0.6) for trapping respirable dust (Stokes diameter, d≤5 μm) and best ALR range(0.4～0.5) trapping inhalable dust (5 μm≤d≤10 μm) were proposed. The best X_NS range (15～25 μm) for trapping respirable dust and best X_NS range (25～30 μm) for trapping inhalable dust were proposed.

Key words: confined space, effervescent atomization, coupling rule, ratio of air to liquid (ALR), fine particle

CLC Number:

X964

ZHAO Xiaoliang, QI Qingjie, GE Shaocheng, HAN Fangwei, LYU Xue, BI Wenyi. Experimental study on coupling relation between effervescent atomization droplet size and particle size of dust in confined space[J]. China Safety Science Journal, 2017, 27(3): 129-134.

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