C - Chemistry – Metallurgy – 10 – B
Patent
C - Chemistry, Metallurgy
10
B
202/42
C10B 57/10 (2006.01) F26B 3/26 (2006.01) F26B 17/16 (2006.01)
Patent
CA 1194831
ABSTRACT OF THE DISCLOSURE Method and apparatus for operation of a carboniza- tion or coking plant, with which coking furnaces are periodic- ally charged with pre-heated coal and the obtained coke under- goes a dry cooling by means of a gaseous cooling medium, heat discharged from the coke dry cooling being used directly or indirectly for pre-heating of the coal, with the coal preheating accomplished using a travelling bed drier, having a heat exchange tube which is heated with hot gas or waste-heat vapor from the coke dry cooling. Preferred embodiments include withdrawing exhaust gas-containing vapors produced in the travelling bed drier from different levels thereof, cleaning, cooling and con- densing them and then disposing into a waste water discharge; superposing a fluidized bed drier upon the travelling bed drier, and initially heating the coal in the former to a temperature between about 60 and 100°C, thus drying the coal only to the extent that a sufficient flowability is ensured in the travell- ing bed drier, in which the coal is then heated to a final temp- erature of about 200°C and dried to a residual water content of about 0.1% by weight; supplementing the heating of the driers with flue gas produced by combustion of a fuel in a separate combustion chamber, and admixing steam to adjust the gas temper- ature. The travelling bed drier possesses a heat exchange tube within a frame, the tube displaying a surface increased through suitable design such as fins or ribs, a conical tapering in the direction of the coal feed, and discharge connections located at different levels on a side of the frame lying opposite vapor or hot gas entry, the connections being for the discharge of ex- haust gas-containing vapors.
404229
Petrovic Vladan
Schmid Karl
Schmidt-Traub Henner
Fetherstonhaugh & Co.
Krupp-Kopper Gmbh
Schmid Karl
Schmidt-Traub Henner
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