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Laboratory investigation of enclosed cab filtration system performance factors

机译：封闭式驾驶室过滤系统性能因素的实验室调查

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Enclosed cabs are a primary means of reducing the silica dust exposure of equipment operators at surface mines. The National Institute for Occupational Safety and Health (NIOSH) has investigated various factor effects on enclosed cab air filtration system performance. Factors experimentally investigated were intake filter efficiency, intake air leakage, intake filter loading (filter flow resistance), recirculation filter use and wind velocity effects on cab penetration (inside to outside cab concentration ratio). Adding an intake pressurizer fan to the filtration system was also investigated. Results indicate that the intake filter efficiency and recirculation filter were the two most influential factors on cab penetration. Use of a recirculation filter significantly reduced cab penetration over the intake air filter by itself due to the multiplicable filtration of the cab interior air. Cab penetration was also affected to a lesser extent by intake filter loading and air leakage. Adding an intake pressurizer fan notably increased intake airflow and cab pressure while providing only minor changes to cab penetration. [PUBLICATION ABSTRACT]
机译：封闭式驾驶室是减少设备操作员在露天矿开采的二氧化硅粉尘的主要方法。美国国家职业安全与健康研究所（NIOSH）已研究了各种因素对封闭式驾驶室空气过滤系统性能的影响。实验研究的因素是进气滤清器效率，进气泄漏，进气滤清器负载（滤清器流阻），再循环滤清器的使用以及风速对驾驶室穿透力的影响（内外驾驶室浓度比）。还研究了在过滤系统中增加进气增压风扇。结果表明，进气滤清器效率和再循环滤清器是对驾驶室穿透力影响最大的两个因素。由于可以对驾驶室内部空气进行多次过滤，因此使用再循环过滤器可以显着减少驾驶室自身在进气过滤器上的渗透。驾驶室穿透力也受到进气​​过滤器负载和空气泄漏的影响较小。添加进气增压风扇显着增加了进气流量和驾驶室压力，同时仅对驾驶室穿透力进行了很小的改变。 [出版物摘要]

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    《Mining Engineering》 |2009年第1期|p.48-54|共7页
  • 作者

    J A Organiscak A B Cecala;

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    JA ORGANISCM AND Al CECMAJ.A. Organiscak and A.B. Cecala, members SME, are senior research engineers with the National Institute for Occupational Safety and Health (NIOSH), Pittsburg, PA. Paper number TP-07-052. Original manuscript submitted December 2007. Revised manuscript accepted for publication, June 2008. Discussion of this peer-reviewed and approved paper is invited and must be submitted to SME Publications Dept. prior to April 30, 2009.;

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