US3782883A - Flat flame burner having a low air to gas ratio - Google Patents
Flat flame burner having a low air to gas ratio Download PDFInfo
- Publication number
- US3782883A US3782883A US00245932A US3782883DA US3782883A US 3782883 A US3782883 A US 3782883A US 00245932 A US00245932 A US 00245932A US 3782883D A US3782883D A US 3782883DA US 3782883 A US3782883 A US 3782883A
- Authority
- US
- United States
- Prior art keywords
- diameter
- burner
- chamber
- opening
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
- F23D14/125—Radiant burners heating a wall surface to incandescence
Definitions
- the burner has a cup shaped combustion chamber with outwardly extending tapered walls leading from the combustion chamber. At the upstream end of the combustion chamber, generally tangential means is provided for introducing a mixture of gas into the combustion chamber.
- the geometry of the burner is such that virtually total reaction takes place within the combustion chamber and along the tapered walls.
- FIG. 1 is a vertical cross-sectional view of a burner incorporating the principles of the invention taken along line 11 of FIG. 2;
- FIG. 2 is a horizontal cross-sectional view taken along line 2-2 of FIG. 1;
- FIG. 3 is a plan view of the bumer shown in FIG. 1.
- a burner is shown generally at secured to the top of a furnace l2 and having a portion received within an opening 14 of the furnace.
- the burner comprises a housing 16 which has a metallic shell 18 that receives refractory block 20.
- the refractory block 20 has a cup shaped combustion chamber 22 which is confluent with the interior of the furnace.
- An annular plate 24 is disposed about the housing 16 and secures the housing to the furnace by the use of bolts 26 received within an annular plate 28 welded to the top of the furnace 12.
- the portion of the burner 10 received within the opening 14 has a tapered, generally conical member 30 with a right cylindrical portion 32 whose diameter is somewhat larger than the diameter of the cup shaped combustion chamber 22, thereby defining a transverse shoulder 34 therebetween.
- the ratio of the length of the right cylindrical portion 32 to its diameter should be 1/5 to H2, the preferred ratio being approximately U4.
- the ratio of the cylindrical 32 diameter to the chamber 22 diameter should be between 2/1 and 6/5.
- the conical member 30 has tapered walls 36 that provide a smooth and regular surface from the upstream end of the conical member to the furnace 12 interior.
- the upstream end of the combustion chamber 22 has a pair of dual diameter ports 38 or openings.
- Each of the ports 38 has a large diameter portion 42 upstream from the chamber 22 and a small diameter portion 44 adjacent to the chamber.
- Received within each large diameter portion 42 of these ports 38 is one end of a sleeve 40.
- Each sleeve 40 has a first opening 46 at the outermost end thereof of which receives a coaxially disposed gas line 48 that has a portion which extends a dis tance into the ports 38 and an external portion which may be connected to a source of combustible gas.
- the interior end of the gas line 48 within the sleeve 40 is supplied with a spud 50 which has a small opening 52 therein.
- Each sleeve 40 also has an opening 54 located at the upper end thereof, which opening receives an air manifold 56.
- the air manifold in turn is connected to an air supply line 58.
- Received within the housing 16 and directed to the combustion chamber 22 is a pilot 60.
- the ports 38 are generally tangentially disposed to the combustion chamber 22 as can be seen in FIG. 2.
- the ports 38 are not exactly tangential, but are offset by 24 so that the gases are directed slightly away from the wall of the combustion chamber 22. It has been found that having this slight angle to the tangential promotes mixing and stability within the combustion chamber 22. In a burner of the type to which this invention is directed, it is advantageous to promote mixing to achieve maximum combustion intensity. It has been found that particular relationships between the small diameter portion 44 of the ports 38 and the large diameter portion 42 aid in the primary mixing of the air and gas. Specifiallly, it has been found that if the diameter of the large portion 42 is approximately twice that of the smaller portion 44, better mixing is achieved, and a back pressure is obtained.
- the relative lengths of the port portions 42 and 44 are important, and the length of the larger diameter portion 42 should be approximately twice the length of the smaller diameter portin 44. It also has been found that if the length from the spud. opening 52 to the necked down portions of the ports 38, which length is indicated by a, is approximately 5 to 10 times as great as the diameter of the spud opening 52, mixing is promoted. Preferably, this difference is approximately 7.5. Additionally, this also aids in creating a back pressure required for operation of the burning.
- the burner 10 has a high stability when used with either cold or preheated air.
- no instability was noted in operation with l,000 F. preheated air at air/gas ratios ranging from 10/ l to 5/1.
- the burner was also found operational at air to gas ratios as low as 6.5/1 using cold air. At ratios below 6.5/1 using cold air the presence of free carbon was found in the flue gas. Again using cold air, slight instability was detected at ratios above 17/1, but the instability did not reach a point of flame blowout at /1.
- a flat flame burner comprising: a housing, an opening within said housing defining a cup shaped combustion chamber, a pair of dual diameter ports extending through the housing to the interior portion of the wall of said chamber in a generally tangential manner, a member secured to the housing and having a generally conically-shaped interior in a confluent relationship with said chamber, said member having its smaller diameter end adjacent to and larger than the diameter of said chamber to define a shoulder, each of said ports having a first portion adjacent said chamber and a second portion adjacent and upstream of said first portion, said second portion having a larger diameter than said first portion, and means for supplying combustion gas and air to said ports in a coaxial direction.
- each of said ports is positioned at a 24 angle relative to the tangential of said chamber.
- a flat flame burner comprising: a housing, a cup shaped opening within said housing defining a chamber, a member secured to the housing and having a recessed interior in the form of a right cylindrical portion having tapered walls extending from said cylindrical portion, said cylindrical portion being adjacent said chamber, a plurality of ports extending through the housing into said chamber in a generally tangential manner each of said ports having a first portion adjacent said opening with a first diameter and a second portion adjacent and upstream of said first portion with a second diameter larger than said first diameter, means for providing air and gas to said second portion of each of said ports in a coaxial direction.
- said gas supply means is a longitudinally extending tube received within the second portion of said port with the terminating end of said gas tube having an opening therein.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24593272A | 1972-04-20 | 1972-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3782883A true US3782883A (en) | 1974-01-01 |
Family
ID=22928679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00245932A Expired - Lifetime US3782883A (en) | 1972-04-20 | 1972-04-20 | Flat flame burner having a low air to gas ratio |
Country Status (10)
Country | Link |
---|---|
US (1) | US3782883A (it) |
JP (1) | JPS5239499B2 (it) |
BR (1) | BR7302725D0 (it) |
CA (1) | CA961403A (it) |
DE (1) | DE2315907C3 (it) |
ES (1) | ES190009Y (it) |
FR (1) | FR2181326A5 (it) |
GB (1) | GB1414043A (it) |
IT (1) | IT981998B (it) |
RO (1) | RO65178A (it) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5078368A (en) * | 1990-05-07 | 1992-01-07 | Indugas, Inc. | Gas fired melting furnace |
US5207972A (en) * | 1990-05-07 | 1993-05-04 | Indugas, Inc. | High temperature furnace |
US5240404A (en) * | 1992-02-03 | 1993-08-31 | Southern California Gas Company | Ultra low NOx industrial burner |
US5297959A (en) * | 1990-05-07 | 1994-03-29 | Indugas, Inc. | High temperature furnace |
US5437262A (en) * | 1994-02-17 | 1995-08-01 | Gas Research Institute | Burner apparatus |
US5707226A (en) * | 1995-02-15 | 1998-01-13 | N.V. Nederlandse Gasunie | Burner |
US20100099052A1 (en) * | 2002-08-09 | 2010-04-22 | Jfe Steel Corporation | Tubular flame burner and combustion control method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5489644A (en) * | 1977-12-26 | 1979-07-16 | Sharp Corp | Corona charger |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1656907A (en) * | 1923-03-05 | 1928-01-24 | Bansen Hugo | Gas burner |
US2890746A (en) * | 1955-01-03 | 1959-06-16 | Phillips Petroleum Co | Non premix burner for producing carbon black |
US2941585A (en) * | 1957-07-29 | 1960-06-21 | Cleaver Brooks Co | Oil-gas burner |
US2969833A (en) * | 1957-04-11 | 1961-01-31 | Bloom Eng Co Inc | Burner mechanism |
US3221797A (en) * | 1963-11-18 | 1965-12-07 | Selas Corp Of America | Industrial burner |
US3286997A (en) * | 1961-04-18 | 1966-11-22 | Thiokol Chemical Corp | Vortex fuel injector |
US3315726A (en) * | 1965-03-19 | 1967-04-25 | Selas Corp Of America | Industrial burner |
-
1972
- 1972-04-20 US US00245932A patent/US3782883A/en not_active Expired - Lifetime
-
1973
- 1973-01-17 CA CA161,448A patent/CA961403A/en not_active Expired
- 1973-03-09 GB GB1142373A patent/GB1414043A/en not_active Expired
- 1973-03-26 ES ES1973190009U patent/ES190009Y/es not_active Expired
- 1973-03-28 IT IT22268/73A patent/IT981998B/it active
- 1973-03-30 DE DE2315907A patent/DE2315907C3/de not_active Expired
- 1973-04-16 FR FR7313626A patent/FR2181326A5/fr not_active Expired
- 1973-04-16 BR BR732725A patent/BR7302725D0/pt unknown
- 1973-04-17 RO RO7374510A patent/RO65178A/ro unknown
- 1973-04-17 JP JP48043564A patent/JPS5239499B2/ja not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1656907A (en) * | 1923-03-05 | 1928-01-24 | Bansen Hugo | Gas burner |
US2890746A (en) * | 1955-01-03 | 1959-06-16 | Phillips Petroleum Co | Non premix burner for producing carbon black |
US2969833A (en) * | 1957-04-11 | 1961-01-31 | Bloom Eng Co Inc | Burner mechanism |
US2941585A (en) * | 1957-07-29 | 1960-06-21 | Cleaver Brooks Co | Oil-gas burner |
US3286997A (en) * | 1961-04-18 | 1966-11-22 | Thiokol Chemical Corp | Vortex fuel injector |
US3221797A (en) * | 1963-11-18 | 1965-12-07 | Selas Corp Of America | Industrial burner |
US3315726A (en) * | 1965-03-19 | 1967-04-25 | Selas Corp Of America | Industrial burner |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5078368A (en) * | 1990-05-07 | 1992-01-07 | Indugas, Inc. | Gas fired melting furnace |
US5207972A (en) * | 1990-05-07 | 1993-05-04 | Indugas, Inc. | High temperature furnace |
US5297959A (en) * | 1990-05-07 | 1994-03-29 | Indugas, Inc. | High temperature furnace |
US5240404A (en) * | 1992-02-03 | 1993-08-31 | Southern California Gas Company | Ultra low NOx industrial burner |
US5437262A (en) * | 1994-02-17 | 1995-08-01 | Gas Research Institute | Burner apparatus |
US5707226A (en) * | 1995-02-15 | 1998-01-13 | N.V. Nederlandse Gasunie | Burner |
US20100099052A1 (en) * | 2002-08-09 | 2010-04-22 | Jfe Steel Corporation | Tubular flame burner and combustion control method |
US20100104991A1 (en) * | 2002-08-09 | 2010-04-29 | Jfe Steel Corporation | Tubular flame burner |
US8944809B2 (en) | 2002-08-09 | 2015-02-03 | Jfe Steel Corporation | Tubular flame burner and combustion control method |
Also Published As
Publication number | Publication date |
---|---|
CA961403A (en) | 1975-01-21 |
DE2315907C3 (de) | 1979-02-01 |
RO65178A (fr) | 1979-05-15 |
AU5359273A (en) | 1974-09-26 |
BR7302725D0 (pt) | 1974-08-29 |
DE2315907A1 (de) | 1973-10-31 |
IT981998B (it) | 1974-10-10 |
JPS4917533A (it) | 1974-02-16 |
DE2315907B2 (de) | 1978-04-27 |
FR2181326A5 (it) | 1973-11-30 |
GB1414043A (en) | 1975-11-12 |
ES190009U (es) | 1974-04-16 |
JPS5239499B2 (it) | 1977-10-05 |
ES190009Y (es) | 1974-10-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FL AEROSPACE CORP. Free format text: CHANGE OF NAME;ASSIGNORS:MIDLAND-ROSS CORPORATION MERGING INTO;MRC MERGER CORP., CHANGED NAME TO;MIDLAND - ROSS CORPORATION, CHANGED TO;REEL/FRAME:005240/0352 Effective date: 19880926 Owner name: SURFACE COMBUSTION, INC., OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FL AEROSPACE CORP.;REEL/FRAME:005091/0582 Effective date: 19880608 |