US3940253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the purification of process waste gases
Assignee: GKN Aerospace Sweden AB
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Filing: 1973-12-07
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Granted: 1976-02-24
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Expires: 1993-12-07
Abstract
Abstract A combustion chamber device for the purification of process waste gases from poisonous, noisome and/or other noxious constituents by combustion while using a support combustion device and under conditions used in gas turbine technology. The process gases to be purified are fed into the combustion chamber through the axial central inlet thereof, and the combustion chamber is provided with a special inlet for further additional air. A flame tube is disposed inside the combustion chamber wall and spaced therefrom. The flame tube is arranged to be cooled by means of a film of the main part of the further additional air entering through the special inlet.
Inventors
- 👤 Karl Axel Zetterstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:55
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/06; F23G7/061; F23G7/065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
209 words
Apparatus for the purification by combustion of waste gases emanating from chemical processes and the like and having poisonous, odious and/or other noxious and/or corrosive constituents comprising: an elongate outer casing, an inner flame tube disposed within but spaced from said outer casing and providing an inner surface which is exposed to the combustion of the waste gasses occurring in said flame tube, means for admitting air into the space between said flame tube and said outer casing, means comprising a multiplicity of through slots in said inner flame tube spaced about the periphery of said flame tube and along its length for permitting the flow of air from said space into said flame tube to flow as a thin film of air over the inner surface of said air tube, means for burning a fuel at said inlet end of said flame tube, means for spreading the flame from the burning fuel over the entire cross-sectional area of said flame tube, and means for admitting the gases to be purified into an inlet end of said flame tube and for passing said gases through the flame of the burning fuel, the purified gases following combustion in said flame tube exiting at the other end of said flame tube.
Claim 2
Dependent Claim
209 words
Apparatus for the purification by combustion of waste gases emanating from chemical processes and the like and having poisonous, odious and/or other noxious and/or corrosive constituents comprising: an elongate outer casing, an inner flame tube disposed within but spaced from said outer casing and providing an inner surface which is exposed to the combustion of the waste gasses occurring in said flame tube, means for admitting air into the space between said flame tube and said outer casing, means comprising a multiplicity of through slots in said inner flame tube spaced about the periphery of said flame tube and along its length for permitting the flow of air from said space into said flame tube to flow as a thin film of air over the inner surface of said air tube, means for burning a fuel at said inlet end of said flame tube, means for spreading the flame from the burning fuel over the entire cross-sectional area of said flame tube, and means for admitting the gases to be purified into an inlet end of said flame tube and for passing said gases through the flame of the burning fuel, the purified gases following combustion in said flame tube exiting at the other end of said flame tube.
Claim 3
Dependent Claim
29 words
The apparatus of claim 1 which further includes an inlet means for admitting outside air for admixture with said gases to be purified before entry into said flame tube.
Claim 4
Dependent Claim
23 words
The apparatus of claim 1 wherein said flame tube is of circular cross-section and has a substantially uniform inner diameter over its length.
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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |