US3688747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace burner arrangement
Assignee: Foster Wheeler Inc
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Filing: 1970-12-14
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Granted: 1972-09-05
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Expires: 1990-12-14
Abstract
Abstract In a furnace in which the combustion air, fuels and combustion products travel through a furnace section having a generally rectangular cross-section, maximum efficiency is assured by providing a large flame length and thorough mixing of fuel and air. The burners are placed in the corners so that the flames extend diagonally in the furnace and tilted either upwardly or downwardly and are positioned in a spiral configuration with respect to one another.
Inventors
- 👤 John M Connell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:41
CPC Classifications
F; F22; F22B; F22B31/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
74 words
In the furnace section of a comparatively small steam generator, a plurality of burners arranged in plan in a rectangular configuration with respect to each other, each of said burners being aimed generally toward the center of said furnace and tilted with respect to the horizontal so that the flame length of said burners is longer than would otherwise be possible, said burners being arranged in a spiral configuration with respect to one another.
Claim 2
Dependent Claim
74 words
In the furnace section of a comparatively small steam generator, a plurality of burners arranged in plan in a rectangular configuration with respect to each other, each of said burners being aimed generally toward the center of said furnace and tilted with respect to the horizontal so that the flame length of said burners is longer than would otherwise be possible, said burners being arranged in a spiral configuration with respect to one another.
Claim 3
Dependent Claim
34 words
The furnace section defined in claim 1, said section being suBstantially vertical, further comprising a substantially horizontal convection section, said convection section joined at one end thereof to the top of said furnace section.
Claim 4
Dependent Claim
43 words
The furnace section and convection section defined in claim 2 wherein each of said sections has an outer wall, and said sections are joined together by welds between the outer wall of said furnace section and the outer wall of said convection section.
Claim 5
Dependent Claim
42 words
The furnace section and convection section defined in claim 3 further comprising a substantially vertical convection section said vertical convection section having an outer wall and being joined at the top thereof to the other end of said substantially horizontal convection section.
Claim 6
Dependent Claim
13 words
The furnace section defined in claim 1 wherein said burners are tilted upward.
Claim 7
Dependent Claim
13 words
The furnace section defined in claim 1 wherein said burners are tilted downward.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |