Method for thermal dehydration of brown coal

Details Method for thermal dehydration of brown coal Method for thermal dehydration of brown coal

1978-03-10

1980-01-29

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

159 47R, F26B 700

Patent

active

041853954

ABSTRACT:
A method is disclosed for thermal dehydration of brown coal, by which an excellent heat recovery can be accomplished. The method includes the steps of admixing raw brown coal with a solvent to prepare a slurry, preheating the slurry in a heat exchanger, heating the same at 100.degree. to 300.degree. C., passing it through a gas-liquid separator to separate it into a steam-containing vapor and a dehydrated slurry and recoverying the dehydrated slurry while the steam-containing vapor is recycled to the heat exchanger so as to be utilized as a heating medium for preheating the slurry.

REFERENCES:
patent: 2830769 (1958-04-01), Work

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