Patent US5489203A successfully refreshed from Google Patents.
US5489203A
Expired / Lapsed
US
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Method of operating a premixing burner
Assignee: GSI LUMONICS Inc
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Filing: 1994-08-18
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Granted: 1996-02-06
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Expires: 2014-08-18
Abstract
Abstract A premixing burner (X) which consists essentially of at least two hollow partial bodies (1, 2), which are positioned one above the other and whose center lines (1b, 2b) extend offset relative to one another in the longitudinal direction of the partial bodies (1, 2), is employed for hot gas generation, for example in a firing plant. Due to this offset, tangential inlet slots (21, 22) respectively occur through which a combustion airflow (15) flows into the internal space (14) of the premixing burner (X). Venturi mixers (32) with fuel nozzles (36), through which a fuel (31) is introduced into the combustion air (15) flowing past at this point, are arranged in the region of these tangential inlet slots (21, 22).
Inventors
- 👤 Klaus Dobbeling
- 👤 Hans P. Knopfel
- 👤 Thomas Sattelmayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:46
CPC Classifications
F; F23; F23C; F23C7/00; F23C7/002; F23D; F23D11/00; F23D11/36; F23D11/40; F23D14/00; F23D14/46; F23D14/62; F23D17/00; F23D17/002; F23C2900/00; F23C2900/07002; F23D2214/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
A premixing burner, comprising: at least two hollow partial bodies positioned adjacent to define a interior space, longitudinal centerlines of each of the bodies being offset so that the bodies define longitudinally extending inlet slots for tangentially directed flow of combustion air into the interior space, the bodies being open at an axial inlet end for an axial flow of combustion air; a venturi mixer comprising two elongate bodies, one body mounted on each of the partial bodies at the inlet slots, and a third elongate body disposed in the inlet slot between the elongate bodies mounted on the partial bodies to form two longitudinal flow paths in the inlet slots; and at least one fuel nozzle positioned in the venturi mixer and directed to inject fuel in the venturi section at a location of maximum combustion air flow velocity.
Claim 2
Dependent Claim
140 words
A premixing burner, comprising: at least two hollow partial bodies positioned adjacent to define a interior space, longitudinal centerlines of each of the bodies being offset so that the bodies define longitudinally extending inlet slots for tangentially directed flow of combustion air into the interior space, the bodies being open at an axial inlet end for an axial flow of combustion air; a venturi mixer comprising two elongate bodies, one body mounted on each of the partial bodies at the inlet slots, and a third elongate body disposed in the inlet slot between the elongate bodies mounted on the partial bodies to form two longitudinal flow paths in the inlet slots; and at least one fuel nozzle positioned in the venturi mixer and directed to inject fuel in the venturi section at a location of maximum combustion air flow velocity.
Claim 3
Dependent Claim
39 words
The premixing burner as claimed in claim 1, wherein the premixing burner further comprises at least one of a fuel nozzle placed at the axial inlet end and a plurality of fuel nozzles arranged in the tangential inlet slots.
Claim 4
Dependent Claim
61 words
The premixing burner as claimed in claim 1, further comprising means for introducing a gaseous fuel through the fuel nozzle in the region of the venturi mixer, means for introducing a liquid fuel through the fuel nozzle arranged at the axial inlet end and means for introducing a gaseous fuel through the plurality of fuel nozzles in the tangential inlet slots.
Claim 5
Dependent Claim
22 words
The premixing burner as claimed in claim 1, wherein the partial bodies have a uniformly increasing flow cross-section in the flow direction.
Claim 6
Dependent Claim
22 words
The premixing burner as claimed in claim 1, wherein the partial bodies have a non-uniformly increasing flow cross-section in the flow direction.
Claim 7
Dependent Claim
22 words
The premixing burner as claimed in claim 1, wherein the partial bodies have a uniformly decreasing flow cross-section in the flow direction.
Claim 8
Dependent Claim
22 words
The premixing burner as claimed in claim 1, wherein the partial bodies have a non-uniformly decreasing flow cross-section in the flow direction.
Claim 9
Dependent Claim
28 words
The premixing burner as claimed in claim 1, wherein the venturi mixer is directed to inject fuel perpendicular to a flow direction of the tangentially inflowing combustion air.
Claim 10
Dependent Claim
28 words
The premixing burner as claimed in claim 1, wherein two fuel nozzles are mounted in the third elongate body, one nozzle directed to each of the flow paths.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |