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AssigneeGeneral Electric Technology GmbH
InventorsMichael SAPANARO, Frederic VITSE, Rachel LADUE, Joseph KRAWIEC
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A steam generating system includes a nozzle assembly for pulverized coal and air, the coal nozzle assembly comprises an inner housing (3) for conveying primary air and coal and an outer housing (5) for conveying secondary air to an exit face (13) of a nozzle tip (1), wherein the outer housing (3) and the inner housing (5) are arranged coaxially and limit a channel (15) for the secondary air, wherein the cross-sectional area (AIH) of the inner housing (3) increases towards the exit face (13) of the nozzle tip (1), wherein the cross-sectional area (AOH) of the outer housing (5) decreases towards the exit face (13), and wherein bars (11) are located in the inner housing (3) near the exit face (13) that accelerate the velocity of the primary air and coal particles.
Coal nozzle assembly for a steam generation apparatus comprising an inner housing (3) for conveying primary air and coal through a nozzle tip (1) toward an exit face (13) and an outer housing (5) for conveying secondary air through the nozzle tip (1), wherein the outer housing (5) and the inner housing (3) are arranged coaxially and limit a channel (15) for the secondary air, characterized in that the cross-sectional area (AIH) of the inner housing (3) increases towards an exit face (13) of the nozzle tip (1), that the cross-sectional area (AOH) of the outer housing (5) decreases towards the exit face (13), and in that at least one bar (11) is located in the inner housing (3) near the exit face (13).
A method of operating a coal nozzle assembly comprising an inner housing (3) for conveying primary air and coal through a nozzle tip (1) toward an exit face (13) and an outer housing (5) for conveying secondary air through the nozzle tip (1), comprising the steps of
Dependencies are inferred from the claim text.