Back to results
US 5,580,237 AGranted
Oxidant lancing nozzle
AssigneePraxair Technology, Inc.
InventorChristopher B. Leger
Life of this patent
Estimating the term…
Abstract
An oxidant lancing nozzle and lancing method wherein first and second oxidant streams are injected into a combustion zone under defined conditions enabling the lancing of oxygen to augment a main combustion reaction with improved flame stability and unchanged or even reduced NO.sub.x formation.
Claims10
An oxidant lancing nozzle comprising:
- (A) a nozzle body having a surface and a centerline;
- (B) at least one first passage oriented within the nozzle body communicating with the nozzle surface and oriented at a first outward angle from the centerline, and having a size for injecting oxidant at a first oxidant velocity;
- and
- (C) at least one second passage within the nozzle body communicating with the nozzle surface closer to the centerline than where said first passage communicates with the nozzle/face, and oriented at a second outward angle from the centerline which is greater than said first outward angle from the centerline, and having a size for injecting oxidant at a velocity which is less than the first oxidant velocity.
1 more element
A method for lancing oxidant into a combustion zone comprising:
- (A) injecting at least one first oxidant stream into the combustion zone through a nozzle having a centerline at a first velocity and at a first outward angle from the centerline;
- (B) injecting at least one second oxidant stream into the combustion zone through the nozzle at a second velocity, which is less than said first velocity, and at a second outward angle from the centerline which is greater than said first outward angle from the centerline;
- and
- (C) wherein the said second oxidant stream is injected into the combustion zone, from a surface of the nozzle closer to the centerline than the said first oxidant stream is injected into the combustion zone.
1 more element
Dependencies are inferred from the claim text.