Fuel and related compositions – Coal treating process or product thereof – Removal of undesirable
Patent
1987-06-24
1988-09-06
Garvin, Patrick P.
Fuel and related compositions
Coal treating process or product thereof
Removal of undesirable
34 13, C10L 908
Patent
active
047690429
ABSTRACT:
There is provided a process for the heat treatment of coal which comprises heating and drying low grade coal such as subbituminous coal and brown coal containing less than 80% of carbon and more than 33% of volatile matter (dry mineral matter-free basis) and having a high moisture content and a particle diameter smaller than 2 inches, with a high-temperature gas containing less than 5% of oxygen in a fluidized bed for 2-10 minutes until the coal temperature reaches 180.degree.-400.degree. C., and subsequently cooling the coal by spraying water in a fluidized bed for 2-10 minutes until the coal temperature decreases to 60.degree. C. or below at which time the coal holds the maximum moisture given by wetting. The heating process may be performed in two steps, in which case coal is heated with a high-temperature gas to 80.degree.-150.degree. C. in the first step so that the moisture of coal is reduced below the inherent moisture. The cooling process may be performed in two steps, in which case heated coal is rapidly cooled to about 120.degree. C. with a cooling gas of high steam content in the first step.
REFERENCES:
patent: 3985517 (1976-10-01), Johnson
patent: 4192650 (1980-03-01), Seitzer
patent: 4401436 (1983-08-01), Bonnecaze
Ito Yoshifumi
Sato Fumiaki
Tamai Mamoru
Taoda Kiyomichi
Teramoto Michio
Fourson George R.
Garvin Patrick P.
Goldberg Jules E.
Mitsubishi Jukogyo Kabushiki Kaisha
LandOfFree
Process for heat treatment of coal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for heat treatment of coal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for heat treatment of coal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1604775