US 5,516,281 AGranted

Multiple jet burner

OwnerMarvin A. Molodowinventor

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Abstract

A gas burner comprising a housing with a front exit, a back surface, and an outer surface. The housing has a closed back surface at one end and an open exit at the other end. The housing is separated into a fuel-oxygen mixing chamber and a second chamber by a support plate. A multiplicity of jets passing through the support plate such that the fuel-oxygen mixing chamber is in communication with the second chamber through the jets. The fuel-oxygen mixing chamber has an inlet for a first-gas, usually a fuel gas, and an exit. The second chamber has an inlet for a second-gas, usually oxygen. The jets arranged such that each jet centerline is unique with respect to all other jet centerlines and each jet centerline is directed from the support plate to the housing exit. The housing exit contoured such that a substantially constant distance is maintained between the boundary of the exit and a closed path lying in the surface of the exit which is the shortest path circumscribing projections of the jet centerlines onto the surface of the exit. Constructing the burner entirely out of quartz or similar material is indicated. Fuel-oxygen mixing chambers in the shape of a parallelpiped, a frustum of a wedge, and a hollow circular cylinder sector for use in a radial burner are indicated. Recessing the jets with respect to the housing exit is indicated.

Claims20

Dependent claims

A multiple-jet, mixing gas burner comprising:

(a) a housing means, said housing means having a front exit, a back surface, and an outer surface;
(b) a multiplicity of jets;
(c) a support means within said housing means for supporting said multiplicity of jets;
(d) a jet centerline for each of the jets defined by the centerline normal to the cross sectional area at the outlet of each of the jets;
said multiplicity of jets arranged such that each said jet centerline is directed from said support means to said front exit of said housing means;
(e) a closed jet centerline path lying in the surface of said front exit of said housing means, said closed jet centerline path being the shortest closed path which circumscribes said jet centerlines;
(f) a gap measured from a point on the boundary of said exit of said housing means to the nearest point on said closed jet centerline path, said front exit of said housing means contoured such that said gap associated with any point on boundary of said exit of said housing means is an approximately constant distance from the selected point on boundary of said exit of said housing to the nearest point on said closed jet centerline path;
(g) a first-gas porting means for permitting entry of a first gas into said housing means;
(h) a mixing chamber within said housing means for receiving said first gas entering said housing means at said first-gas porting means, said mixing chamber being located adjacent said support means and adjacent said front exit of said housing means;
(i) a second-gas porting means for permitting entry of a second gas into said housing means;
(j) a second chamber within said housing means for receiving said second gas entering said housing means at said second-gas porting means, said second chamber being located adjacent said support means and adjacent said back surface of said housing means, said second chamber in communication with said mixing chamber through said multiplicity of jets;
(k) said approximately constant distance gap varying no more than approximately 50% to 200% of nominal, said approximately constant distance gap equal to the sum of the distance:
(a) from said jet centerline of the largest diameter jet to the outer wall of the largest diameter jet;
(b) and a number between 0.010 and 0.120 inches;
(l) said mixing chamber defining a volume substantially in the shape selected from the group consisting of:
(a) a parallelepiped, and
(b) a frustum of a wedge, and
(c) a frustum of a cone, and
(d) a hollow circular cylinder sector.

16 more elements

A multiple-jet, mixing gas burner comprising:

(a) a housing means, said housing means having a front exit, a back surface, and an outer surface;
(b) a multiplicity of jets;
(c) a support means within said housing means for supporting said multiplicity of jets;
(d) a jet centerline for each of the jets defined by the centerline normal to the cross sectional area at the outlet of each of the jets;
said multiplicity of jets arranged such that each said jet centerline is directed from said support means to said front exit of said housing means;
(e) a closed jet centerline path lying in the surface of said front exit of said housing means, said closed jet centerline path being the shortest closed path which circumscribes said jet centerlines;
(f) a gap measured from a point on the boundary of said exit of said housing means to the nearest point on said closed jet centerline path, said front exit of said housing means contoured such that said gap associated with any point on boundary of said exit of said housing means is an approximately constant distance from the selected point on boundary of said exit of said housing to the nearest point on said closed jet centerline path;
(g) a first-gas porting means for permitting entry of a first gas into said housing means;
(h) a mixing chamber within said housing means for receiving said first gas entering said housing means at said first-gas porting means, said mixing chamber being located adjacent said support means and adjacent said front exit of said housing means;
(i) a second-gas porting means for permitting entry of a second gas into said housing means;
(j) a second chamber within said housing means for receiving said second gas entering said housing means at said second-gas porting means, said second chamber being located adjacent said support means and adjacent said back surface of said housing means, said second chamber in communication with said mixing chamber through said multiplicity of jets;
(k) said approximately constant distance gap varying no more than approximately 50% to 200% of nominal, said approximately constant distance gap equal to the sum of the distance:
(a) from said jet centerline of the largest diameter jet to the outer wall of the largest diameter jet;
(b) and a number between 0.010 and 0.120 inches;
(l) all elements of said mixing gas burner made of quartz.

12 more elements

A multiple-jet, mixing gas burner comprising:

(a) a housing means, said housing means having a front exit, a back surface, and an outer surface;
(b) a multiplicity of jets;
(c) a support means within said housing means for supporting said multiplicity of jets;
(d) a jet centerline for each of the jets defined by the centerline normal to the cross sectional area at the outlet of each of the jets;
said multiplicity of jets arranged such that each said jet centerline is directed from said support means to said front exit of said housing means;
(e) a closed jet centerline path lying in the surface of said front exit of said housing means, said closed jet centerline path being the shortest closed path which circumscribes said jet centerlines;
(f) a gap measured from a point on the boundary of said exit of said housing means to the nearest point on said closed jet centerline path, said front exit of said housing means contoured such that said gap associated with any point on boundary of said exit of said housing means is an approximately constant distance from the selected point on boundary of said exit of said housing to the nearest point on said closed jet centerline path;
(g) a first-gas porting means for permitting entry of a first gas into said housing means;
(h) a mixing chamber within said housing memos for receiving said first gas entering said housing means at said first-gas porting means, said mixing chamber being located adjacent said support means and adjacent said front exit of said housing means;
(i) a second-gas porting means for permitting entry of a second gas into said housing means;
(j) a second chamber within said housing means for receiving said second gas entering said housing means at said second-gas porting means, said second chamber being located adjacent said support means and adjacent said back surface of said housing means, said second chamber in communication with said mixing chamber through said multiplicity of jets;
(k) said multiplicity of jets recessed from said front exit of said housing means such that the longest jet is no closer to said front exit of said housing than a distance of between 5% to 25% of the shortest distance between said support means and said front exit of said housing means.

9 more elements

A multiple-jet, mixing gas burner comprising:

(a) a housing means, said housing means having a front exit, a back surface, and an outer surface;
(b) a multiplicity of jets;
(c) a support means within said housing means for supporting said multiplicity of jets;
(d) a jet centerline for each of the jets defined by the centerline normal to the cross sectional area at the outlet of each of the jets;
said multiplicity of jets arranged such that each said jet centerline is directed from said support means to said front exit of said housing means;
(e) a closed jet centerline path lying in the surface of said front exit of said housing means, said closed jet centerline path being the shortest closed path which circumscribes said jet centerlines;
(f) a gap measured from a point on the boundary of said exit of said housing means to the nearest point on said closed jet centerline path, said front exit of said housing means contoured such that said gap associated with any point on boundary of said exit of said housing means is an approximately constant distance from the selected point on boundary of said exit of said housing to the nearest point on said closed jet centerline path;
(g) a first-gas porting means for permitting entry of a first gas into said housing means;
(h) a mixing chamber within said housing means for receiving said first gas entering said housing means at said first-gas porting means, said mixing chamber being located adjacent said support means and adjacent said front exit of said housing means;
(i) a second-gas porting means for permitting entry of a second gas into said housing means;
(j) a second chamber within said housing means for receiving said second gas entering said housing means at said second-gas porting means, said second chamber being located adjacent said support means and adjacent said back surface of said housing means, said second chamber in communication with said mixing chamber through said multiplicity of jets;
(k) said mixing chamber exit substantially in the shape of a rectangle having an aspect ratio of approximately 1.0 to 10.0.

9 more elements

A process for mixing and combusting a fuel gas and oxygen gas, comprising the steps of:

(a) burning the fuel with a burner comprising a housing means having a front exit, at least one side surface, and a back surface;
a multiplicity of jets, said jets disposed in said housing means;
a support means for supporting said multiplicity of jets;
a mixing chamber and a second chamber located within said housing means, wherein said mixing chamber is defined by said side surface of said housing means, said front exit of said housing means, and said support means, and wherein said second chamber is defined by said side surface of said housing means, said back surface of said housing means, and said support means;
said multiplicity of jets providing the sole means for communicating between said mixing chamber and said second chamber;
a jet centerline defined by the centerline normal to the cross sectional area of the outlet of each of the jets;
said multiplicity of jets arranged such that each jet centerline is directed from said support means to said front exit of said housing means;
said front exit of said housing means boundary a substantially constant distance from a closed path lying in the surface of said exit of said housing means, said closed path being the shortest path circumscribing projections of said jet centerlines onto surface of said exit of said housing means;
(b) providing high pressure oxygen gas to the second chamber to encourage said oxygen gas to move downstream toward the housing exit;
mixing oxygen gas into said fuel gas at outlet of the jets by passing oxygen from said second chamber through said multiplicity of jets into mixing chamber;
(c) providing high pressure fuel gas to said mixing &amber;
said fuel gas moving among exterior of said multiplicity of jets;
said fuel gas proceeding downstream towards the housing exit and mixing with oxygen gas exiting the outlets of the jets;
(d) providing a fuel gas envelope surrounding the mixture and extending beyond the housing means exit, said fuel gas envelope creating a substantially atmospheric-air-free combustion volume within the envelope;
(e) combusting mixture in substantially atmospheric-air-free environment by using said fuel gas envelope to isolate the combustion process from atmospheric air.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/383,914Filed 6 Feb 1995
Granted: 14 May 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

C03B 37/01257
Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing: heating devices therefor
C03B 23/0086
Re-forming shaped glass: heating devices specially adapted for re-forming shaped glass articles in general, e.g. burners
C03B 23/043
Re-forming tubes or rods: heating devices specially adapted for re-forming tubes or rods in general, e.g. burners
C03B 37/01291
Starting from pulverulent glass: by progressive melting, e.g. melting glass powder during delivery to and adhering the so-formed melt to a target…