US3746499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Staged air burner with swirling auxiliary air flow
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1972-01-12
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Granted: 1973-07-17
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Expires: 1992-01-12
Abstract
Abstract A chamberless, high intensity staged air burner especially suited for the incineration and combustion of contaminated fuels and waste streams by achieving a high, concentrated degree of mixing and, therefore, a high temperature, in a relatively small but structurally unconfined volume. The burner utilizes the principle of vortex air flow from an air induction chamber together with swirling auxiliary air flow to achieve a high degree of recirculation local to the point of fuel injection, to provide intimate mixing of fuel and air, precise control over the flame envelope. Utilizing the air required for combustion in the foregoing manner eliminates the need for a refractory-lined chamber which otherwise would be required to confine the combustion process in order to generate the extreme temperatures sometimes required for complete incineration. The swirling auxiliary air flow is obtained by providing a plurality of circumferentially arranged swirl vanes in way of the portion of inlet air directed through the auxiliary air passageways. These swirl vanes may be mounted for limited movement or can be stationarily secured in the desired position.
Inventors
- 👤 R Guerre
- 👤 R Ruland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:50
CPC Classifications
F; F23; F23C; F23C7/00; F23C7/002; F23C7/004; F23C7/006
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
255 words
A chamberless staged-air vortex burner for use in the burning of fuels and adapted to be mounted in a furnace wall having an opening therein comprising in combination, burner casing means having an air inlet adapted for receiving an inlet air flow, air induction chamber means having an outlet and being mounted within said burner casing for receiving a predetermined portion of said inlet air flow and producing a helical vortex primary air flow from said outlet, refractory means mounted in said casing about said chamber outlet, said refractory means including a substantially divergent surface extending outward from the periphery of said outlet to a plane common with the outer surface of said furnace wall, air gap means adapted to receive the remaining portion of said inlet air flow, said air gap means comprising at least one air gap of substantially uniform annular configuration extending through said refractory means and located between said outlet and the plane of said outer surface of said furnace wall in which said burner is to be mounted, means for imparting spinning directional motion to at least a part of the remaining portion of said inlet air flow as it enters said one air gap, said one air gap being angularly disposed relative to the axis of said primary air flow for projecting spinning secondary air flow in a convergent direction toward the primary air flow axis to contain the flame envelope and obtain precise flame control and intimate mixing of fuel and air proximate the point of fuel injection.
Claim 2
Dependent Claim
255 words
A chamberless staged-air vortex burner for use in the burning of fuels and adapted to be mounted in a furnace wall having an opening therein comprising in combination, burner casing means having an air inlet adapted for receiving an inlet air flow, air induction chamber means having an outlet and being mounted within said burner casing for receiving a predetermined portion of said inlet air flow and producing a helical vortex primary air flow from said outlet, refractory means mounted in said casing about said chamber outlet, said refractory means including a substantially divergent surface extending outward from the periphery of said outlet to a plane common with the outer surface of said furnace wall, air gap means adapted to receive the remaining portion of said inlet air flow, said air gap means comprising at least one air gap of substantially uniform annular configuration extending through said refractory means and located between said outlet and the plane of said outer surface of said furnace wall in which said burner is to be mounted, means for imparting spinning directional motion to at least a part of the remaining portion of said inlet air flow as it enters said one air gap, said one air gap being angularly disposed relative to the axis of said primary air flow for projecting spinning secondary air flow in a convergent direction toward the primary air flow axis to contain the flame envelope and obtain precise flame control and intimate mixing of fuel and air proximate the point of fuel injection.
Claim 3
Dependent Claim
29 words
A vortex burner according to claim 1 wherein said motion imparting means is located radially outward of said chamber outlet directly adjacent the inlet to said one air gap.
Claim 4
Dependent Claim
30 words
A vortex burner according to claim 1 wherein said one air gap is angularly disposed to provide convergent upward air flow in an outward direction relative to said chamber outlet.
Claim 5
Dependent Claim
19 words
A vortex burner according to claim 1 including means for selectively adjusting the width of said one air gap.
Claim 6
Dependent Claim
51 words
A vortex burner according to claim 1 wherein said burner is constructed and arranged such that said air induction means is adapted to receive substantially 25 to 50 percent of said inlet air flow and said air gap means is adapted to receive the remaining portion of said inlet air flow.
Claim 7
Dependent Claim
30 words
A vortex burner according to claim 1 wherein said motion imparting means comprises a plurality of movably mounted vanes for imparting a different spinning motion to said secondary air flow.
Claim 8
Dependent Claim
15 words
A vortex burner according to claim 1 wherein said motion imparting means are mounted stationarily.
Claim 9
Dependent Claim
29 words
A vortex burner according to claim 1 wherein said motion imparting means is arranged to spin the secondary air flow in the same direction as the primary air flow.
Claim 10
Dependent Claim
29 words
A vortex burner according to claim 1 wherein said motion imparting means is arranged to spin the secoNdary air flow in a countercurrent direction to said primary air flow.
Claim 11
Dependent Claim
39 words
A vortex burner according to claim 1 wherein said motion imparting means comprises a rotatable plate means located radially outward of said chamber outlet proximate the inlet to said one air gap, spin vanes mounted on said rotatable means.
Claim 12
Dependent Claim
18 words
A vortex burner according to claim 10 including means for guiding said rotatable plate means upon movement thereof.
Claim 13
Dependent Claim
37 words
A vortex burner according to claim 10 wherein said spin vanes are mounted for pivotal movement on said rotatable plate means, and including guide means associated with each of said spin vanes for limiting the movement thereof.
Claim 14
Dependent Claim
22 words
A vortex burner according to claim 10 including manually engageable means operably secured to said rotatable plate means for facilitating movement thereof.
Claim 15
Dependent Claim
292 words
A chamberless staged-air vortex burner for use in the burning of fuels and adapted to be mounted in a furnace wall having an opening therein comprising in combination, burner casing means having an air inlet adapted for receiving an inlet air flow, air induction chamber means having an outlet and being mounted within said burner casing for receiving a predetermined portion of said inlet air flow and producing a helical vortex primary air flow from said outlet, a support plate secured radially about said chamber means and extending radially outward therefrom, refractory means mounted on said support plate about said chamber outlet, said refractory means including a substantially divergent surface extending outward from the periphery of said outlet to a plane common with the outer surface of said furnace wall, air gap means adapted to receive the remaining portion of said inlet air flow, said air gap means comprising at least one air gap of substantially uniform annular configuration extending through said refractory means and located between said outlet and the plane of said outer surface of said furnace wall in which said burner is to be mounted, an annular member disposed on said support plate outward of said refractory means, spin vanes mounted on said annular member about said chamber means for imparting spinning motion to at least part of the remaining portion of said inlet air flow, means for restricting movement of said annular member, said one air gap being angularly disposed relative to the axis of said primary air flow for projecting spinning secondary air flow in a convergent direction toward the primary air flow axis to contain the flame envelope and obtain precise flame control and intimate mixing of fuel and air proximate the point of fuel injection.
Claim 16
Dependent Claim
292 words
A chamberless staged-air vortex burner for use in the burning of fuels and adapted to be mounted in a furnace wall having an opening therein comprising in combination, burner casing means having an air inlet adapted for receiving an inlet air flow, air induction chamber means having an outlet and being mounted within said burner casing for receiving a predetermined portion of said inlet air flow and producing a helical vortex primary air flow from said outlet, a support plate secured radially about said chamber means and extending radially outward therefrom, refractory means mounted on said support plate about said chamber outlet, said refractory means including a substantially divergent surface extending outward from the periphery of said outlet to a plane common with the outer surface of said furnace wall, air gap means adapted to receive the remaining portion of said inlet air flow, said air gap means comprising at least one air gap of substantially uniform annular configuration extending through said refractory means and located between said outlet and the plane of said outer surface of said furnace wall in which said burner is to be mounted, an annular member disposed on said support plate outward of said refractory means, spin vanes mounted on said annular member about said chamber means for imparting spinning motion to at least part of the remaining portion of said inlet air flow, means for restricting movement of said annular member, said one air gap being angularly disposed relative to the axis of said primary air flow for projecting spinning secondary air flow in a convergent direction toward the primary air flow axis to contain the flame envelope and obtain precise flame control and intimate mixing of fuel and air proximate the point of fuel injection.
Claim 17
Dependent Claim
230 words
A chamberless staged-air vortex burner for use in the burning of fuels and adapted to be mounted in a furnace wall having an opening therein comprising in combination, burner casing means having an air inlet adapted for receiving an inlet air flow, air induction chamber means having an outlet and mounted within said burner casing for receiving a predetermined portion of said inlet air flow and producing an uninterrupted helical vortex primary air flow from said outlet, refractory means including a substantially divergent surface extending outward from the periphery of said outlet to a plane common with the outer surface of said furnace wall, air gap means adapted to receive the remaining portion of said inlet air flow, said air gap means comprising at least one air gas of substantially uniform annular configuration extending through said refractory means and located between said outlet and the plane of said outer surface, means for imparting spinning directional motion to at least part of the remaining portion of said inlet air flow as it enters said one air gap, said one air gap being angularly disposed relative to the plane of said outer surface for projecting spinning secondary air flow in an outward direction relative to said outlet of said induction chamber for containment of the flame envelope, whereby intimate mixing of fuel and air is obtained proximate the point of fuel injectioN.
Claim 18
Dependent Claim
230 words
A chamberless staged-air vortex burner for use in the burning of fuels and adapted to be mounted in a furnace wall having an opening therein comprising in combination, burner casing means having an air inlet adapted for receiving an inlet air flow, air induction chamber means having an outlet and mounted within said burner casing for receiving a predetermined portion of said inlet air flow and producing an uninterrupted helical vortex primary air flow from said outlet, refractory means including a substantially divergent surface extending outward from the periphery of said outlet to a plane common with the outer surface of said furnace wall, air gap means adapted to receive the remaining portion of said inlet air flow, said air gap means comprising at least one air gas of substantially uniform annular configuration extending through said refractory means and located between said outlet and the plane of said outer surface, means for imparting spinning directional motion to at least part of the remaining portion of said inlet air flow as it enters said one air gap, said one air gap being angularly disposed relative to the plane of said outer surface for projecting spinning secondary air flow in an outward direction relative to said outlet of said induction chamber for containment of the flame envelope, whereby intimate mixing of fuel and air is obtained proximate the point of fuel injectioN.
Claim 19
Dependent Claim
27 words
A vortex burner according to claim 1 wherein said one air gap is disposed angularly relative to the plane of said outer surface of said furnace wall.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |