Fuel and related compositions – Coal treating process or product thereof – Removal of undesirable
Patent
1999-05-17
2000-12-19
McAvoy, Ellen M.
Fuel and related compositions
Coal treating process or product thereof
Removal of undesirable
44620, C10L 132, C10L 900
Patent
active
061622656
ABSTRACT:
A process for preparing an irreversibly dried coal. In the first step of the process, a first fluidized bed reactor with a bed whose density is from about 30 to about 50 pounds per cubic foot and whose temperature is from about 480 to about 600 degrees Fahrenheit is contacted with a coal with a moisture content of from about 15 to about 30 percent, liquid phase water, inert gas, and air. The comminuted and dewatered coal produced in the first fluidized bed reactor is then passed to a second fluidized bed with a density of from about 30 to about 50 pounds per cubic foot and a temperature of from about 215 to about 250 degrees Fahrenheit, to which water, inert gas, and from about 0.5 to about 3.0 weight percent of mineral oil with an initial boiling point of at least about 900 degrees Fahrenheit is also fed; the temperature of the comminuted and dewatered coal is reduced to the temperature of from about 215 to about 250 degrees Fahrenheit in less than about 120 seconds.
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Dunlop Donald D.
Kenyon, Jr. Leon C.
Fuels Management Inc.
Greenwald Howard J.
McAvoy Ellen M.
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