Correlation analysis of three influencing factors and the dust production rate for a free-falling particle stream--颗粒学报PARTICUOLOGY

Duan, M., Wang, Y., Ren, X., Qu, X., Cao, Y., Yang, Y., & Nian, L. (2017). Correlation analysis of three influencing factors and the dust production rate for a free-falling particle stream. Particuology, 34, 126-133. https://doi.org/10.1016/j.partic.2017.03.003

Correlation analysis of three influencing factors and the dust production rate for a free-falling particle stream

Mengjie Duan ^a, Yi Wang^a *, Xiaofen Ren ^b, Xinrui Qu ^a, Yingxue Cao ^a, Yang Yang ^a, Lun Nian ^c

a School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China
b College of Urban Construction, Hebei University of Engineering, Handan 056038, Hebei, China
c Fourth Military Medical University, Xi'an 710032, Shaanxi, China

10.1016/j.partic.2017.03.003

Volume 34, October 2017, Pages 126-133

Received 30 January 2016, Revised 26 March 2017, Accepted 28 March 2017, Available online 29 June 2017, Version of Record 12 August 2017.

E-mail: wangyi6920@126.com

Highlights

• Effects of three factors on dust emission from a free-falling particle stream were studied.

• First and second fugitive dust emission rates were measured under various conditions.

• Correlations of fugitive dust emission rate with the influencing factors were presented.

Abstract

The effects of three factors (i.e., drop height h, hopper outlet diameter d₀, and material temperature T) on the dust generation rate derived from a free falling particle stream were investigated via full factorial experiments. The correlation between the three factors and dust generation rate was also analysed. Results show that T and h affect the first fugitive dust rate largely, whereas the second fugitive dust rate is mainly dominated by h and d₀. Through analysing the first fugitive dust percentage data, it is found that h and T should be considered first for higher temperatures and lower flow rates, whereas h and d₀ can be considered under contrasting conditions, and h should be controlled in the remaining two sets of conditions. Relationships between the influencing factors and total and first fugitive dust rates were developed via multiple regression to quantify the dust emission rates for different contact surfaces (rigid or water).

Graphical abstract

Keywords

Particle stream; Free falling; Multiple factors; Correlation; Regression analysis

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