...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mining Engineering >Air cleaning performance of a new environmentally controlled primary crusher operator booth
【24h】

Air cleaning performance of a new environmentally controlled primary crusher operator booth

机译：新型环保主破碎机操作员工作间的空气净化性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The National Institute for Occupational Safety and Health (NIOSH) cooperated with 3M Company in the design and testing of a new environmentally controlled primary crusher operator booth at the company's Wausau granite quarry near Wausau, Wl. This quarry had an older crusher booth without a central heating, ventilation and air conditioning (HVAC) system, and without an air filtration and pressurization system. A new replacement operator booth was designed and installed by 3M based on design considerations from past NIOSH research on enclosed cab filtration systems. NIOSH conducted pre-testing of the old booth and post-testing of the new booth to assess the new filtration and pressurization system's effectiveness in controlling airborne dusts and particulates. The booth's dust and particulate control effectiveness is described by its protection factor, expressed as a ratio of the outside to inside concentrations measured during testing. Results indicate that the old booth provided negligible airborne respirable dust protection and low particulate protection from the outside environment. The newly installed booth provided average respirable dust protection factors from 2 to 25 over five shifts of dust sampling with occasional worker ingress and egress from the booth, allowing some unfiltered contaminants to enter the enclosure. Shorter-term particle count testing outside and inside the booth under near-steady-state conditions, with no workers entering or exiting the booth, resulted in protection factors from 35 to 127 on 0.3- to 1.0-um respirable size particulates under various HVAC airflow operating conditions.
机译：美国国家职业安全与健康研究院（NIOSH）与3M公司合作，在该公司位于威斯康星州Wausau附近的Wausau花岗岩采石场设计并测试了一个新的环保主破碎机操作员工作间。该采石场的破碎机摊位较旧，没有中央供暖，通风和空调（HVAC）系统，也没有空气过滤和加压系统。 3M根据NIOSH过去对封闭式驾驶室过滤系统研究的设计考虑，设计并安装了一个新的替换操作员工作间。 NIOSH对旧展位进行了预测试，对新展位进行了后测试，以评估新的过滤和加压系统在控制空气中的粉尘和微粒方面的有效性。展位的粉尘和颗粒物控制效果由其保护系数表示，保护系数表示为在测试过程中测得的内部浓度与内部浓度之比。结果表明，旧的展位提供了可忽略的空气传播呼吸性粉尘防护，并且对外界环境的微粒防护较低。新安装的摊位在五班制的灰尘采样中提供了平均可呼吸的防尘系数，从2到25，并且工人偶尔从摊位进出，允许一些未过滤的污染物进入机柜。在接近稳态的情况下，在工作间内外进行短期颗粒计数测试，没有工人进出工作间，在各种HVAC气流下，对于0.3至1.0um的可吸入颗粒物，保护系数从35到127。运行条件。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号