Coal nozzle assembly comprising two flow channels
AssigneeGeneral Electric Company
InventorsKevin Michael Howe, John Childs Lewis, Alfred Josef Gwosdz
Life of this patent
Estimating the term…
Abstract
A coal nozzle assembly for a steam generation apparatus comprising an elongated nozzle body having a nozzle tip at one end thereof; said nozzle tip comprising two channels, each channel having curved or buckled flow paths, the nozzle tip further comprising parting means separating the channels from each other, wherein the directions of the flow paths of the channels at their ends distal from the nozzle body enclose an angle between 0° and 90°. This promotes intersecting and shearing the two partial streams outside the nozzle assembly resulting in a better combustion with reduced NOx-emissions.
Claims15
A coal nozzle assembly for a steam generation apparatus comprising an elongated nozzle body having a nozzle tip at one end thereof;
- said nozzle tip comprising two channels each channel having a curved or buckled flow path, the nozzle tip further comprising means separating the channels from each other and splitting a stream of coal particles and primary air exiting the nozzle body into two partial streams inside the nozzle tip, wherein the directions of the flow paths of the channels at their ends distal from the nozzle body enclose an angle greater than 0° and equal to or less than 90° wherein the partial streams are redirected inside the nozzle tip through the curved or buckled flow paths such that they intersect and shear against each other upon exit of the nozzle tip before they are combusted.
A coal nozzle assembly for a steam generation apparatus comprising an elongated nozzle body and an inner shell having two nozzle tips at one end thereof;
- the coal nozzle assembly further comprising means being located in the inner shell upstream of said two nozzle tips and splitting a stream of coal particles and primary air from said nozzle body into partial streams flowing through the two nozzle tips, the directions of the flow paths of the two nozzle tips enclosing an angle (α) greater than 0° and equal to or less than 90°, wherein the two partial streams are redirected by means of the two nozzle tips such that they intersect and shear against each other upon exit of the nozzle tip before they are combusted.
Dependencies are inferred from the claim text.