Further Development of the Rotating Brush Aerosol Separator
Final engineering rept. 8 Jan-7 Oct 1970
IIT RESEARCH INST CHICAGO IL
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The rotating brush aerosol separator was redesigned and extensively modified to permit a parametric investigation of the design and operational variables. Centrifugal effects were found to be an important mechanism, although impaction effects significantly enhance separation at brush speeds above 2400 RPM. In comparable tests with flat-blades versus 1 mm wires, the wire brushes required 15 less horsepower at 3000 RPM and 8000 CFM to achieve a 95 separation efficiency compared to 86 for the flat-blade brushes. The highest efficiencies were obtained with the near exhaust position when the wire brush speeds exceeded 2400 RPM. The addition of wires in the axial direction more or longer brushes is more efficient than in the radial direction more wiresrow, especially for the 2 mm wires. Similarly, at 3000 RPM and 8000 CFM when the number brushes was doubled, the amount of dust which was not removed by the separator was reduced by one-half. While the 1 mm wires appear to be more efficient than the 2 mm wires on a constant impaction area basis, considerations of wire erosion and ease of maintenance favors the use of the heavier wires.
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