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Laboratory evaluation of the mrde scrubber.
Divers-EF; Janosik-JJ; Payton-LE
NTIS: PB 293 256, 1979; :1-11
This Bureau of Mines report describes the results of a laboratory evaluation of a mechanical dust collector (scrubber) suitable for underground coal mine applications. The scrubber was developed by the Mining Research and Development Establishment (BRDE), Burton-on- Trent, England, and tested at the federal Bureau of Mines Pittsburgh Mining and Safety Research Center (PMSRC) as part of a technical exchange program. The 2,000- to 8,000-cfm scrubber consists of an electrically driven vane-axial fan, water sprays, a 2-inch-thick, loosely knit stainless steel wire filter panel, and a water droplet eliminator. The dust-laden airstream travels axially through the water sprays, filter panel, fan, and eliminator. Slurry water drains into a sump where a belt-driven pump recycles it back to the sprays. Fractional breakdown tests showed a maximum dust collection efficiency of 96 pct of respirable-size (less than 7 um) coal dust at 2,000 cfm. Efficiency decreased with increasing airflow; for example, to 91 pct at 6,000 cfm. Following these tests the original wire panel was replaced with a similar but smaller panel developed at PMSRC; a marked improvement in dust collection occurred at all flow rates tested.
Mining-industry; Dust-collectors; Scrubbers; Coal-mining; Underground-mining; Equipment-design; Equipment-reliability; Performance-capability; Laboratory-testing; Dust-collection
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 293 256
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division