Back to results
US 11,353,212 B2Granted
Low NOxburner apparatus and method
AssigneeZeeco, Inc.
InventorsDarton J. Zink, Rex K. Isaacs, John Petersen, Cody Little, Tim Kirk
Life of this patent
Estimating the term…
Abstract
A burner apparatus and method which provide an increased amount of internal flue recirculation for reducing NOx emissions by ejecting a series of surrounding primary fuel streams and also ejecting on one or more subsequent series of surrounding fuel streams outside of the burner wall toward the burner combustion wherein each succeeding series of surrounding fuel streams must travel a greater distance to the combustion zone and each series of surrounding fuel streams must contact one or more radial impact structures provided on the exterior of the burner wall.
Claims22
A burner apparatus for discharging a burner flame in a heating system having inert gaseous products of combustion therein, the burner apparatus comprising:
- a burner wall having a forward longitudinal end and an exterior;
- a flow passageway for air or other oxygen source which extends through the burner wall, the flow passageway having a discharge at the forward longitudinal end of the burner wall from which the air or other oxygen source is discharged into a combustion zone;
- a series of primary fuel ejectors positioned outside of the flow passageway which are located rearwardly of and radially outward from the forward longitudinal end of the burner wall and are located rearwardly of the combustion zone, each of the primary fuel ejectors having one or more ejection ports being oriented to eject a primary fuel stream along a primary fuel flow path which travels outside of the burner wall, through the inert products of combustion, prior to reaching the combustion zone;
- at least one primary radial impact structure which is provided on the exterior of the burner wall and is positioned forwardly of the series of primary fuel ejectors in the primary fuel flow path of the primary fuel stream ejected by each of the primary fuel ejectors;
- a series of secondary fuel ejectors, positioned outside of the flow passageway, which are located rearwardly of and radially outward from the primary fuel ejectors, each of the secondary fuel ejectors having one or more ejection ports oriented to eject a secondary fuel stream along a secondary fuel flow path which travels outside of the burner wall, through the inert products of combustion, prior to reaching the combustion zone;
- and
- at least one secondary radial impact structure which is provided on the exterior of the burner wall and is positioned rearwardly of the at least one primary radial impact structure, and forwardly of the series of secondary fuel ejectors, in the secondary fuel flow path of the secondary fuel stream ejected by each of the secondary fuel ejectors,
- the at least one primary radial impact structure on the exterior of the burner wall also being positioned in the secondary fuel flow paths so that the secondary fuel stream ejected by each of the secondary fuel ejectors travels outside of the burner wall through the inert products of combustion to the at least one secondary radial impact structure and then travels outside of the burner wall from the at least one secondary radial impact structure through the inert products of combustion to the at least one primary radial impact structure and to the combustion zone.
5 more elements
A burner apparatus for discharging a burner flame in a heating system having gaseous products of combustion therein, the burner apparatus comprising:
- a burner wall having a forward longitudinal end and an exterior;
- a flow passageway for air or other oxygen source which extends through and is surrounded by the burner wall, the flow passageway having a discharge at the forward longitudinal end of the burner wall from which the air or other oxygen source is discharged into a combustion zone;
- a series of primary fuel ejection structures which are positioned outside of and which surround the flow passageway, the primary fuel ejection structures being located rearwardly of and radially outward from the forward longitudinal end of the burner wall and each of the primary fuel ejection structures being oriented to eject a primary fuel stream along a primary fuel flow path outside of the burner wall toward the combustion zone;
- at least one primary radial impact structure which is provided on the exterior of the burner wall and is positioned in the primary fuel flow paths for contacting at least a portion of the primary fuel stream ejected by each of the primary fuel ejection structures;
- a series of secondary fuel ejection structures which are positioned outside of and which surround the flow passageway, the secondary fuel ejection structures being located rearwardly of and radially outward from the primary fuel ejection structures and each of the secondary fuel ejection structures being oriented to eject a secondary fuel stream along a secondary fuel flow path outside of the burner wall toward the combustion zone;
- at least one secondary radial impact structure which is provided on the exterior of the burner wall and is positioned rearwardly of the at least one primary radial impact structure, in the secondary fuel flow paths, for contacting at least a portion of the secondary fuel stream ejected by each of the secondary fuel ejection structures;
- a series of tertiary fuel ejection structures which are positioned outside of and which surround the flow passageway, the tertiary fuel ejection structures being located rearwardly of and radially outward from the secondary fuel ejection structures and each of the tertiary fuel ejection structures being oriented to eject a tertiary fuel stream along a tertiary fuel flow path outside of the burner wall toward the combustion zone;
- at least one tertiary radial impact structure which is provided on the exterior of the burner wall and is positioned rearwardly of the at least one secondary radial impact structure, in the tertiary fuel flow paths, for contacting at least a portion of the tertiary fuel stream ejected by each of the tertiary fuel ejection structures;
- and
- the at least one secondary radial impact structure on the exterior of the burner wall also being positioned in the tertiary fuel flow paths for contacting at least a portion of the tertiary fuel stream ejected by each of the tertiary fuel ejection structures.
7 more elements
A burner apparatus for discharging a burner flame in a heating system having gaseous products of combustion therein, the burner apparatus comprising:
- a burner wall having a forward longitudinal end and an exterior;
- a flow passageway for air or other oxygen source which extends through and is surrounded by the burner wall, the flow passageway having a discharge at the forward longitudinal end of the burner wall from which the air or other oxygen source is discharged into a combustion zone;
- a series of primary fuel ejection structures which are positioned outside of and which surround the flow passageway, the primary fuel ejection structures being located rearwardly of and radially outward from the forward longitudinal end of the burner wall and each of the primary fuel ejection structures being oriented to eject a primary fuel stream along a primary fuel flow path outside of the burner wall toward the combustion zone;
- at least one primary radial impact structure which is provided on the exterior of the burner wall and is positioned in the primary fuel flow paths for contacting at least a portion of the primary fuel stream ejected by each of the primary fuel ejection structures;
- a series of secondary fuel ejection structures which are positioned outside of and which surround the flow passageway, the secondary fuel ejection structures being located rearwardly of and radially outward from the primary fuel ejection structures and each of the secondary fuel ejection structures being oriented to eject a secondary fuel stream along a secondary fuel flow path outside of the burner wall toward the combustion zone;
- at least one secondary radial impact structure which is provided on the exterior of the burner wall and is positioned rearwardly of the at least one primary radial impact structure, in the secondary fuel flow paths, for contacting at least a portion of the secondary fuel stream ejected by each of the secondary fuel ejection structures;
- a series of tertiary fuel ejection structures which are positioned outside of and which surround the flow passageway, the tertiary fuel ejection structures being located rearwardly of and radially outward from the secondary fuel ejection structures and each of the tertiary fuel ejection structures being oriented to eject a tertiary fuel stream along a tertiary fuel flow path outside of the burner wall toward the combustion zone;
- at least one tertiary radial impact structure which is provided on the exterior of the burner wall and is positioned rearwardly of the at least one secondary radial impact structure, in the tertiary fuel flow paths, for contacting at least a portion of the tertiary fuel stream ejected by each of the tertiary fuel ejection structures,
- the at least one primary radial impact structure being a forward primary radial impact structure;
- a rearward primary radial impact structure which is provided on the exterior of the burner wall and is positioned rearwardly of the forward primary radial impact structure, in the primary fuel flow paths, for contacting at least a portion of the primary fuel stream ejected by each of the primary fuel ejection structures;
- the at least one secondary radial impact structure being a forward secondary radial impact structure;
- a rearward secondary radial impact structure which is provided on the exterior of the burner wall and is positioned rearwardly of the forward secondary radial impact structure, in the secondary fuel flow paths, for contacting at least a portion of the secondary fuel stream ejected by each of the secondary fuel ejection structures;
- the at least one tertiary radial impact structure being a forward tertiary radial impact structure;
- and
- a rearward tertiary radial impact structure which is provided on the exterior of the burner wall and is positioned rearwardly of the forward tertiary radial impact structure, in the tertiary fuel flow paths, for contacting at least a portion of the tertiary fuel stream ejected by each of the tertiary fuel ejection structures.
12 more elements
A burner apparatus for discharging a burner flame in a heating system having gaseous products of combustion therein, the burner apparatus comprising:
- a burner wall having a forward longitudinal end and an exterior;
- a flow passageway for air or other oxygen source which extends through and is surrounded by the burner wall, the flow passageway having a discharge at the forward longitudinal end of the burner wall from which the air or other oxygen source is discharged into a combustion zone;
- a series of primary fuel ejection structures which are positioned outside of and which surround the flow passageway, the primary fuel ejection structures being located rearwardly of and radially outward from the forward longitudinal end of the burner wall and each of the primary fuel ejection structures being oriented to eject a primary fuel stream along a primary fuel flow path outside of the burner wall toward the combustion zone;
- at least one primary radial impact structure which is provided on the exterior of the burner wall and is positioned in the primary fuel flow paths for contacting at least a portion of the primary fuel stream ejected by each of the primary fuel ejection structures;
- a series of secondary fuel ejection structures which are positioned outside of and which surround the flow passageway, the secondary fuel ejection structures being located rearwardly of and radially outward from the primary fuel ejection structures and each of the secondary fuel ejection structures being oriented to eject a secondary fuel stream along a secondary fuel flow path outside of the burner wall toward the combustion zone;
- at least one secondary radial impact structure which is provided on the exterior of the burner wall and is positioned rearwardly of the at least one primary radial impact structure, in the secondary fuel flow paths, for contacting at least a portion of the secondary fuel stream ejected by each of the secondary fuel ejection structures;
- a series of tertiary fuel ejection structures which are positioned outside of and which surround the flow passageway, the tertiary fuel ejection structures being located rearwardly of and radially outward from the secondary fuel ejection structures and each of the tertiary fuel ejection structures being oriented to eject a tertiary fuel stream along a tertiary fuel flow path outside of the burner wall toward the combustion zone;
- and
- at least one tertiary radial impact structure which is provided on the exterior of the burner wall and is positioned rearwardly of the at least one secondary radial impact structure, in the tertiary fuel flow paths, for contacting at least a portion of the tertiary fuel stream ejected by each of the tertiary fuel ejection structures,
- wherein the combustion zone is a single stage combustion zone having only one combustion stage for combusting the primary fuel streams ejected from the primary fuel ejection structures, the secondary fuel streams ejected from the secondary fuel ejection structures, and the tertiary fuel streams ejected from the tertiary fuel ejection structures.
7 more elements
Dependencies are inferred from the claim text.