Coal drying process

Details Coal drying process Coal drying process

1978-11-06

1980-07-22

Camby, John J.

Heating

Processes of heating or heater operation

Including passing, treating or conveying gas into or through...

34 10, 44 33, 432 15, F27B 1500

Patent

active

042137527

ABSTRACT:
A single step process for removing moisture from low rank coal using in-situ generated thermal energy by passing the wet low rank coal at room temperature into a moving bed of hot coal at a temperature in the range of from about 200.degree. C. to about 300.degree. C. at a rate to maintain partial combustion of the coal at atmospheric pressure, and in the presence of a gas at atmospheric pressure containing from about 5% to about 20% by volume of oxygen, the heat generated by the combustion being absorbed by the wet coal being fed to the system and being effective for drying the coal to the desired level, and separating the dried coal from the combustion zone, whereby the dry coal obtained is highly resistant to spontaneous combustion.

REFERENCES:
patent: 2666269 (1954-01-01), Parry
patent: 2668099 (1954-02-01), Cederquist
patent: 2704895 (1955-03-01), Cederquist
patent: 2763478 (1956-09-01), Parry
patent: 2844886 (1958-07-01), Nathan
patent: 2871004 (1959-01-01), Gorin
patent: 3723079 (1973-03-01), Seitzer
patent: 3896557 (1975-07-01), Seitzer et al.
patent: 4043763 (1977-08-01), Norman et al.

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