Drying coal in hot oil slurry using recycled steam

Details Drying coal in hot oil slurry using recycled steam Drying coal in hot oil slurry using recycled steam

1975-03-24

1976-05-04

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 17, F26B 300

Patent

active

039539270

ABSTRACT:
Drying coal having undesirably high moisture content is accomplished by heating the particulate coal in an oil slurry contained in a pressurized drying zone to sufficient temperature to evaporate the moisture. A major portion of the heat required in the drying zone is provided by compressing the hot steam evolved from the coal drying step and condensing it in a heat exchanger passage in the drying zone. The resulting dried coal-oil slurry liquid is then passed on to further processing such as coal hydrogenation or liquefaction steps.

REFERENCES:
patent: 3007254 (1961-11-01), Schuster
patent: 3520067 (1970-07-01), Winegartner
patent: 3802090 (1974-04-01), Delhaye et al.

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