Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1980-05-30
1982-01-05
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 48, 34 62, 201 9, F26B 2110
Patent
active
043086683
ABSTRACT:
In a process for heat treatment, highly hygroscopic coal, with a low carbon content and large equilibrium moisture, is rapidly heated with hot gas at a rate of temperature rise of at least 100.degree. C./min up to a final heating temperature in the range of 300.degree.-500.degree. C., and is then rapidly cooled at a rate of temperature drop of at least 50.degree. C./min to 250.degree. C. or below. As the hot gas, an inert gas whose oxygen concentration is not higher than 4% by volume is employed. The hot gas is either caused to contain not less than 20% by volume of steam or composed solely of the steam.
REFERENCES:
patent: 2815316 (1957-12-01), Kruppa et al.
patent: 3337417 (1967-08-01), Albright
patent: 4099933 (1978-07-01), Johnson et al.
Ito Yoshifumi
Nishimoto Yoshihiko
Sato Fumiaki
Taoda Kiyomichi
Ueda Takashi
Mitsubishi Jukogyo Kabushiki Kaisha
Schwartz Larry I.
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