Process and apparatus for drying and preheating of coking coal in a single flight stream tube
Patent
·
OSTI ID:6561468
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.
- Assignee:
- Bergwerksverband Gmbh (Germany, Federal Republic of) Didier Engineering Gmbh (Germany, Federal Republic Of)
- Patent Number(s):
- US 4241513
- OSTI ID:
- 6561468
- Country of Publication:
- United States
- Language:
- English
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