F - Mech Eng,Light,Heat,Weapons – 23 – D
Patent
F - Mech Eng,Light,Heat,Weapons
23
D
110/18, 39/53
F23D 1/00 (2006.01) C21B 5/00 (2006.01) F23K 3/02 (2006.01)
Patent
CA 1226481
ABSTRACT PROCESS AND APPARATUS FOR BLOWING CARBON DUST INTO AN INDUSTRIAL FURNACE A process for blowing dosed quantities of carbon dust, e.g. coal dust, to be burnt into an industrial furnace having several burning points, especially a shaft furnace such as, for example, a blast furnace of a cupola furnace, is illustrated and described, and in this the coal dust is fed in a dosed fashion to each of the individual burning points in a separate air stream which is under a predetermined pressure, the quantity of coal dust and conveying air fed to a particular burning point is blown into the furnace at supercritical speed, the conveying air being laden with a relatively high proportion of solids, and furthermore the quantity of carbon fed to each burning point is detected directly as a result of volumetric measurement and is appropriately corrected by means of secondary air supplied, when the quantity exceeds or falls below a predetermined nominal-quantity tolerance. The invention also relates to an apparatus suitable for carrying out the process, in which conveyor lines (1) each have, at their outflow end located at a burning point (2), a nozzle (3) which operates at a super critical outflow speed and the diameter of which corresponds to a predetermined quantity blown in, with a predetermined pressure prevailing in the conveyor line (1).
458924
Boiting Hans-Herrmann
Rachner Hans-Guenther
Gowling Lafleur Henderson Llp
Wurth (paul) S.a.
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