Process and apparatus for drying and preheating of coking coal i

Details Process and apparatus for drying and preheating of coking coal i Process and apparatus for drying and preheating of coking coal i

1979-08-30

1980-12-30

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 57A, 432 14, 432 58, F27B 308, F27B 1700

Patent

active

042415136

ABSTRACT:
A process and an apparatus for the drying and preheating of coking coal is described, in which a coarser grain fraction of the starting coal is separated out at least at one location in a flight stream tube through which the coal and a heat carrier gas are fed, and in which this larger grain fraction is subsequently reintroduced into the main stream containing only the finer grain fraction of the coal and the predominant portion of the heat carrier gas. The method and the apparatus through which the method may be carried out allow for a single-step process for both drying and preheating of the coal, make it possible to substantially reduce the length of the flight stream tube necessary, and increase the uniformity of the degree of pretreatment of the variously-sized fractions of the starting material.

REFERENCES:
patent: 3403451 (1968-10-01), Stephanoff
patent: 3518772 (1970-07-01), Barr
patent: 4102635 (1978-07-01), Beck
patent: 4178150 (1979-12-01), Flockenhaus et al.

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