首页|Performance of N95 elastomeric respirators in high humidity and high coal dust concentration environment

Performance of N95 elastomeric respirators in high humidity and high coal dust concentration environment

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High humidity and high dust concentration in deep coal mines may severely challenge the performance of respirators worn by coal miners.This paper aims at quantitatively evaluating the respirators used in deep coal mines and providing scientific guidance for the respiratory protection of miners.Based on the self-designed in-situ PM2.5 collector,controllable PM2.5 generator,human breathing simulator,and respirator simulation testing system,under the simulated deep mine working condition,this study inves-tigated the effects of dust loading,wearing time,and dust concentration on the filtration efficiency,breathing resistance,and quality factor of N95 elastomeric respirators.With the increase of dust loading,the respirator filtration efficiency firstly decreased,then increased (minimum value 97.5％).The breathing resistance increased exponentially from 120 to 180 to 1020-1530 Pa,and the quality factor decreased logarithmically from 0.051 to 0.076 to 0.0058-0.0085 Pa-1.As the PM2.5 coal dust concentration increased from 5 to 50 mg/m3,the wearing time for the respirator breathing resistance to exceed 300 Pa reduced from 7 h to less than 1 h.One N95 elastomeric respirator is not able to perform an 8-h work shift.To avoid the excessive breathing resistance caused by dust loading,more filter cartridges are needed for coal miners.

Coal dustRespiratorDust loadingFiltration efficiencyBreathing resistance

Jintuo Zhu、Xinjian He、Liang Wang、Xiaoxue Liao、Guangping Teng、Pengli Jing

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Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology),Ministry of Education,Xuzhou 221116,China

National Professional Laboratory for Fundamental Research of Mine Gas and Dust Control Technology,School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China

School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China

National Natural Science Foundation of ChinaBasic Research Program of Jiangsu ProvinceFundamental Research Funds for the Central UniversitiesProject funded by China Postdoctoral Science FoundationJiangsu Planned Projects for Postdoctoral Research FundsState Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shan-dong Province and the Ministry of Sci

51904291BK201906382020XGYJ082020 M6817812020Z076SICGM202105

2022

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCDSCIEI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2022.32(1)
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