C - Chemistry – Metallurgy – 10 – J
Patent
C - Chemistry, Metallurgy
10
J
48/11, 48/39
C10J 3/16 (2006.01) C10J 3/08 (2006.01)
Patent
CA 1154965
ABSTRACT OF THE DISCLOSURE This invention comprises a method for the gasification of coal with oxygen or oxygen-containing gas and water vapour and also if required CO2, in which powdered coal is gasified in at least one burner, e.g. a cyclone burner, with oxygen or oxygen containing gas and steam and also if required added CO2 and the primary gas thereby produced is passed upwards, preferably in counter current under pressure through coarser coal contained in a shaft gasifier e.g. a bed (or ballast) of lumps of coal forming free surfaces on the top and bottom, producing product gas and forming liquid slag, characterized in that the liquid slag in the shaft gasifier is collected in a slag bath and is allowed to flow off over a weir into a cooling water bath provided in the shaft gasifier, in that the liquid slay is atomized it is falling freely between the weir and the cooling water bath by means or one or more water jets thereby cooling the slag and forming steam and in that at least part of the steam is upplied as process steam to the coarser coal, preferably the free lower surface of the ballast.
331841
Fetherstonhaugh & Co.
Voest-Alpine Ag
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