US4673348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus
Assignee: Air Products and Chemicals Inc
•
Filing: 1986-04-01
•
Granted: 1987-06-16
•
Expires: 2006-04-01
Abstract
Abstract Oxygen is introduced through oxygen supply line (5) into an annular gallery (6) which it leaves at high velocity through annular channel (7). The outlet of the annular channel (7) is shaped so that, by virtue of the Coanda effect, the oxygen travels towards the downstream end of the burner (1) substantially parallel to the wall of the tubular body (2). Combustion gas from combustion chamber (13) is induced between support bars (4) into the tubular body (2) by the flow of oxygen and mixes with the oxygen and subsequently with natural gas introduced through fuel supply line (8). The mixture burns at the outlet (9) of the fuel supply line (8). The maximum temperature reached by the gas leaving the burner (1) is substantially lower than that which would be obtained by a conventional oxy-fuel flame. The burner may be used in radiant tubes.
Inventors
- 👤 Eric K. Riley
- 👤 Roger Dudill
- 👤 Philip J. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:51
CPC Classifications
F; F23; F23C; F23C9/00; F23C3/00; F23C3/002; F23C7/00; F23L; F23L7/00; F23L7/007; F23L2900/00; F23L2900/07001; Y; Y02; Y02E; Y02E20/00; Y02E20/32; Y02E20/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
181 words
A heating apparatus which comprises a burner and a combustion chamber, wherein said burner comprises a first portion in which, in use, combustion gases from the or another combustion chamber are mixed with one of (a) fuel, and (b) oxygen or oxygen enriched air, a second generally tubular portion including a line which has a plurality of outlets within the confines of said second portion for introducing fuel radially into said second portion, wherein when said apparatus is in use the mixture leaving said first portion is mixed with the other of (a) said fuel, and (b) said oxygen or oxygen enriched air, wherein said combustion chamber is generally U-shaped, having first and second legs, said second portion of said burner is mounted on the first leg of said "U" in alignment therewith, and said first portion of said burner is mounted between the second leg of said "U" and said second portion of said burner; and means for igniting said mixture leaving said second portion of said burner to produce combustion gases in said first leg of said combustion chamber.
Claim 2
Dependent Claim
181 words
A heating apparatus which comprises a burner and a combustion chamber, wherein said burner comprises a first portion in which, in use, combustion gases from the or another combustion chamber are mixed with one of (a) fuel, and (b) oxygen or oxygen enriched air, a second generally tubular portion including a line which has a plurality of outlets within the confines of said second portion for introducing fuel radially into said second portion, wherein when said apparatus is in use the mixture leaving said first portion is mixed with the other of (a) said fuel, and (b) said oxygen or oxygen enriched air, wherein said combustion chamber is generally U-shaped, having first and second legs, said second portion of said burner is mounted on the first leg of said "U" in alignment therewith, and said first portion of said burner is mounted between the second leg of said "U" and said second portion of said burner; and means for igniting said mixture leaving said second portion of said burner to produce combustion gases in said first leg of said combustion chamber.
Claim 3
Dependent Claim
20 words
A heating apparatus as claimed in claim 1, wherein said second portion of said burner is of generally circular cross-section.
Claim 4
Dependent Claim
24 words
A heating apparatus as claimed in claim 2, wherein said first portion of said burner enters said second portion of said burner substantially tangentially.
Claim 5
Dependent Claim
55 words
A heating apparatus as claimed in claim 1, wherein said second portion of said burner comprises a fuel supply line which extends along the axis of said second portion and is provided with a plurality of radial outlets, and wherein a substantially circular disc is mounted at the downstream extremity of said fuel supply line.
Claim 6
Dependent Claim
34 words
A heating apparatus as claimed in claim 1, wherein said combustion chamber is of generally circular cross-section and said first portion of said burner opens tangentially into said second leg of said combustion chamber.
Claim 7
Dependent Claim
61 words
A heating apparatus as claimed in claim 1, wherein said second leg is provided with a baffle for use during start-up, said baffle having a start-up position in which ambient air can be drawn into the first portion of said burner, and an operating position in which only combustion gases from the combustion chamber can be drawn into said first portion.
Claim 8
Dependent Claim
213 words
A heating apparatus which comprises a burner and a combustion chamber wherein said burner comprises a first portion in which, in use, combustion gases from the or another combustion chamber are mixed with one of (a) fuel, and (b) oxygen or oxygen enriched air, a second generally tubular portion including a line which has a plurality of outlets within the confines of said second portion for introducing fuel radially into said second portion, wherein said combustion chamber is substantially link shaped having a first leg, a second leg substantially parallel to said first leg, a first end joining one end of said first leg with the adjacent end of said second leg, and a second end connected to the other end of said second leg and opening substantially in line with said first leg, and wherein said first portion and said second portion of said burner are aligned and are disposed between the inlet of said first leg and the outlet of said second end wherein when said apparatus is in use the mixture leaving said first portion is mixed with the other of (a) said fuel, and (b) said oxygen or oxygen enriched air; and means for igniting said mixture leaving said second portion to produce combustion gases in said combustion chamber.
Claim 9
Dependent Claim
213 words
A heating apparatus which comprises a burner and a combustion chamber wherein said burner comprises a first portion in which, in use, combustion gases from the or another combustion chamber are mixed with one of (a) fuel, and (b) oxygen or oxygen enriched air, a second generally tubular portion including a line which has a plurality of outlets within the confines of said second portion for introducing fuel radially into said second portion, wherein said combustion chamber is substantially link shaped having a first leg, a second leg substantially parallel to said first leg, a first end joining one end of said first leg with the adjacent end of said second leg, and a second end connected to the other end of said second leg and opening substantially in line with said first leg, and wherein said first portion and said second portion of said burner are aligned and are disposed between the inlet of said first leg and the outlet of said second end wherein when said apparatus is in use the mixture leaving said first portion is mixed with the other of (a) said fuel, and (b) said oxygen or oxygen enriched air; and means for igniting said mixture leaving said second portion to produce combustion gases in said combustion chamber.
Claim 10
Dependent Claim
168 words
A heating apparatus including a plurality of combustion chambers and burners, wherein each of said burners comprises a first portion in which, in use, combustion gases from a combustion chamber are mixed with one of (a) fuel, and (b) oxygen or oxygen enriched air, a second generally tubular portion including a line which has a plurality of outlets within the confines of said second portion for introducing fuel radially into said second portion, wherein at least some of said combustion chambers comprise substantially straight tubes, each of said burners is aligned with each said tubes, and means are provided for conveying the combustion gases from the combustion chamber associated with one burner to the first portion of another burner, and wherein when said apparatus is in use the mixture leaving said first portion is mixed with the other of (a) said fuel, and (b) said oxygen or oxygen enriched air; and means for igniting said mixture leaving said second portion to produce combustion gases in said combustion chambers.
Claim 11
Dependent Claim
168 words
A heating apparatus including a plurality of combustion chambers and burners, wherein each of said burners comprises a first portion in which, in use, combustion gases from a combustion chamber are mixed with one of (a) fuel, and (b) oxygen or oxygen enriched air, a second generally tubular portion including a line which has a plurality of outlets within the confines of said second portion for introducing fuel radially into said second portion, wherein at least some of said combustion chambers comprise substantially straight tubes, each of said burners is aligned with each said tubes, and means are provided for conveying the combustion gases from the combustion chamber associated with one burner to the first portion of another burner, and wherein when said apparatus is in use the mixture leaving said first portion is mixed with the other of (a) said fuel, and (b) said oxygen or oxygen enriched air; and means for igniting said mixture leaving said second portion to produce combustion gases in said combustion chambers.
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) | 1990-06-15 | 1990-12-15 | 1991-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-15 | 1994-12-15 | 1995-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-15 | 1998-12-15 | 1999-06-16 | $7700.00 | Window Closed / Lapsed |