Fuel and related compositions – Particulate – Process including removal of undesirable
Patent
1995-01-03
1996-11-19
Johnson, Jerry D.
Fuel and related compositions
Particulate
Process including removal of undesirable
44621, 44622, 44627, 44629, C10L 500
Patent
active
055758240
ABSTRACT:
The present invention provides for a fuel coal processing system having a centrifugal type coal pulverizer and an electrostatic type coal purifier and an optional fuel coal size classifier all combined into one integral, cooperatively acting fuel coal preparation device in one embodiment, and a centrifugal type coal pulverizer and fuel coal size classifier combined in a second embodiment. The centrifugal type coal pulverizer may be a counter rotating cup and ring assembly for breaking apart the coal particles and impurities. The coal particles and impurities leave the pulverizer in flat, radiating, sheet pattern which passes through the electrostatic purifier or separator. The electrostatic separator has a pair of plates which are oppositely charged and arranged next to the pulverizer. The top plate is negatively charged to attract the positively charged pure coal particles and repel the negatively charged pyritic particles. The bottom plate is positively charged to attract the negatively charged pyritic particles and repel the positively charged pure coal particles. A scoop ring then deflects downward the pyritic particles for refuse removal. The pure coal particles are deflected upwards to the burner.
REFERENCES:
patent: 4482351 (1984-11-01), Kitazawa et al.
patent: 4574045 (1986-03-01), Crossmore, Jr.
patent: 5275631 (1994-01-01), Brown et al.
Brown Charles K.
Brown David K.
Finch Walter G.
Johnson Jerry D.
Smith Nancy A.
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