Method and apparatus for indirectly drying and preheating fine m

Details Method and apparatus for indirectly drying and preheating fine m Method and apparatus for indirectly drying and preheating fine m

1982-07-02

1983-12-27

Yuen, Henry C.

Heating

Processes of heating or heater operation

Subjecting work to diverse treatments or graduated temperatures

432107, 432114, 34134, F26B 912, F27B 710

Patent

active

044228465

ABSTRACT:
A method and apparatus is disclosed for indirectly drying and preheating fine material, in particular, moisture containing coal or the like, comprises, providing a rotary drum which is mounted for rotation and has a plurality of heating tubes extending therethrough, supplying heated cooling gas from a dry coke cooling system to the heating tubes, supplying the moist material to the drum, adjacent the bottom thereof, removing the material from the drum after it has been predried and preheated, and returning or recycling a portion of the predried and preheated material to the rotary drum. The method and apparatus utilizes the heated cooling gas used to cool dry coke in a dry coke cooling plant from high temperatures to below 200.degree. C. It has been found that such heated cooling gas for a selected amount of dry coke is useful either in a series of more than one rotary drum or, to process moist material in a single rotary drum and also generate steam as a byproduct.

REFERENCES:
patent: 1052660 (1913-02-01), Geiber
patent: 1571076 (1926-01-01), Warren
patent: 1573144 (1926-02-01), Credo
patent: 2213667 (1940-09-01), Dundas et al.
patent: 2283129 (1942-05-01), Roubal
patent: 3039753 (1962-06-01), Eketorp et al.
patent: 3294384 (1966-12-01), Hollefriend
patent: 3313534 (1967-04-01), Frans
patent: 3782888 (1974-01-01), Cnare
patent: 3920380 (1975-11-01), Heian
patent: 4376343 (1983-03-01), White et al.

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