Coal nozzle assembly for a steam generation apparatus
AssigneeGeneral Electric Technology GmbH
InventorsWilliam Ross Miller, Rachel Ladue
Life of this patent
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Abstract
A steam generating system includes a furnace, a nozzle tip assembly for pulverized coal and primary air as well as means for conveying secondary air in the furnace. The nozzle according to the invention comprises a nozzle body (3) and several channels (5) being connected with the nozzle body, the channels are diverging from each other. At the exit faces (17) of the channels obstructions (13) are disposed to induce huge turbulences of the primary air when entering the furnace. Due to these turbulences the primary air and the entrained coal are mixed very well before being combusted in the furnace. This results in a better more effective combustion with reduced NOx-emissions.
Claims17
A coal nozzle tip assembly for a steam generation apparatus, comprising:
- a nozzle body and several channels connected to the nozzle body, the channels arranged to diverge from each other, wherein at an end distal from the connection between the nozzle body and the channels each channel comprises an exit face, wherein a single obstruction is disposed in each exit face, the obstructions arranged to form a square interrupted by hollow spaces between the channels.
A steam generating system, comprising:
- a furnace;
- at least one coal nozzle tip assembly to direct a flow of solid particles entrained in primary air into the furnace, wherein the at least one coal nozzle tip assembly includes a nozzle body and several channels connected to the nozzle body, the channels arranged to diverge from each other, wherein at an end distal from the connection between the nozzle body and the channels, each channel comprises an exit face, wherein a single obstruction is disposed in each exit face, the obstructions arranged to form a square interrupted by hollow spaces between the channels.
Dependencies are inferred from the claim text.