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Coal dust control by condensation enlargement.

Authors
Schowengerdt-FD; Brown-JT Jr.
Source
Particulate Science Laboratory, Colorado School of Mines, Golden, Colorado, Terminal Progress Report 1982 Jun; :1-34
Link
NIOSHTIC No.
00181018
Abstract
A prototype dust conditioning system for control of coal dust was designed, constructed, and evaluated based on the concept of condensation enlargement. The volume of the device was 0.74 cubic feet and it was designed to handle up to 50 cubic feet per minute (cfm) of dust laden air. The performance of the device was evaluated for both naturally occurring aerosols and laboratory generated coal dust. Both these samples nucleated and grew readily in the conditioner with output droplet sizes ranging up to 10 microns and a large fraction of these falling out inside the conditioner. Nucleation efficiencies of 95 percent were measured, resulting in overall mass removal efficiencies greater than 99 percent at flow rates of 10cfm. At 50cfm, the efficiency dropped to 80 percent. The conditioner consumed 10 gallons of water per hour. Various engineering problems encountered included heat transfer, plate wetting and temperature stability. The device was able to be scaled to a capacity of 3000cfm, sufficient for a full scale mining application. The authors suggest that a geometric configuration of a concentric cylindrical shape with the outer cylinder being cooled and heat introduced along the inner cylinder should be examined as this would have some advantages over the present plane geometry used in the prototype.
Keywords
NIOSH-Grant; Mining-industry; Dust-control; Dust-collectors; Dust-control-equipment; Mineral-dusts; Air-quality-control
Contact
Physics Colorado School of Mines Department of Physics Golden, Colo 80401
Publication Date
19820630
Document Type
Final Grant Report
Funding Amount
149736
Funding Type
Grant
Fiscal Year
1982
NTIS Accession No.
PB88-248679
NTIS Price
A04
Identifying No.
Grant-Number-R01-OH-00822
NIOSH Division
OEP
Source Name
Particulate Science Laboratory, Colorado School of Mines, Golden, Colorado, Terminal Progress Report
State
CO
Performing Organization
Colorado School of Mines, Golden, Colorado
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