Fibrous-type filters are used to capture dust particles in mining and other occupations where personnel are exposed for prolonged periods. Dust cleansing devices including flooded-bed dust scrubbers use these mesh-type multi-layered filters. These filters trap dust particles efficiently on their surface and inside their mesh. However, their continued operation leads to dust build-up and clogging. This results in increased resistance of the filter and lowered airflow rate through the scrubber. This could potentially enhance the exposure of the miners. A non-clogging self-cleaning impingement screen type dust filter was designed by the authors for use in mining and industrial dust cleansing applications. The filter guides dirt-laden air through rapidly turning paths which forces it to shed heavier particles. The particles impact one of the impermeable solid metallic filter surfaces and are removed from the airstream. A full cone water spray installed upstream prevents any surface build-up of dust. This paper summaried the computer models generated to show the filter operations and laboratory experiments including optical particle counting to establish the cleaning efficiency.
|Journal||International Journal of Coal Science and Technology|
|State||Published - Dec 2022|
Bibliographical noteFunding Information:
The authors acknowledge the National Institute for Occupational Safety and Health (NIOSH) for funding this research project. The research in contract #75D30119C06228 ‘Maintenance-free filters for continuous miner scrubber’ is aimed at the development of efficient filters for mining dust alleviation.
© 2022, The Author(s).
- Computational fluid dynamics modeling
- Dust filter
- Flooded-bed dust scrubber
- Iso-kinetic sampling
- Optical particle counting
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Energy Engineering and Power Technology