Method of upgrading low-rank coal

Details Method of upgrading low-rank coal Method of upgrading low-rank coal

1983-09-23

1985-04-16

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

44 1B, 44 6, C10L 908

Patent

active

045113637

ABSTRACT:
This invention relates to a method of upgrading low-rank coal and comprises the steps of dehydrating crushed low-rank coal using a rotary drum in a drying section, dry distilling the low-rank coal dehydrated in the drying section in a rotary drum in a dry distillation section, and cooling subsequently the low-rank coal low temperature dry-distilled in the dry-distillation section in a cooling section and enabling the low-rank coal to adsorb tar that is produced from the low-rank coal in the dry-distillation section. The present invention makes it possible to upgrade continuously large quantities of the low-rank coal with a high moisture content, and hence a low calorific value, to an upgraded coal with an increased calorific value which is not prone to spontaneous generation.

REFERENCES:
patent: 4249909 (1981-02-01), Comolli
patent: 4396393 (1983-08-01), Li et al.

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