US5240409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Premixed fuel/air burners
Assignee: Gas Technology Institute
•
Filing: 1992-04-10
•
Granted: 1993-08-31
•
Expires: 2012-04-10
Abstract
Abstract A premixed fuel/air burner with velocity and fuel/air ratio control having a nozzle with a nozzle wall forming a Venturi mixer and a nozzle exit, means for separately introducing fuel and air into the Venturi mixer, a hollow body disposed in the nozzle and moveable in a longitudinal direction toward the nozzle exit, the hollow body having at least on orifice through a wall thereof at an angle with respect to a longitudinal axis of the nozzle such that fuel is injected through said orifice into the Venturi mixer. Movement of the hollow body toward the nozzle exit changes the cross-sectional area of the Venturi mixer and nozzle exit thereby permitting control of nozzle velocity of the resulting fuel/air mixture. To control the fuel/air ratio, a fixed orifice baffle is provided inside the hollow body which changes the opening of the orifice as the hollow body is moved toward the nozzle exit.
Inventors
- 👤 Tian-yu Xiong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:52
CPC Classifications
F; F23; F23C; F23C9/00; F23C9/006; B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/313; B01F25/3131; F23D; F23D14/00; F23D14/02; F23D14/46; F23D14/62
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
A premix fuel/oxidant burner with velocity and fuel/air ratio control comprising: a nozzle having a nozzle wall forming a Venturi mixer and a nozzle exit; means for separately introducing fuel and oxidant into said nozzle; a hollow body disposed inside said nozzle, said hollow body moveable in a longitudinal direction toward said nozzle exit; said hollow body having at least one orifice through a wall of said hollow body at an angle with respect to a longitudinal axis of said nozzle; and flow control means for controlling a flow of said fuel through said orifice disposed at an inlet side of said orifice, said flow control means comprising a fixed orifice baffle secured to said means for moving said hollow body.
Claim 2
Dependent Claim
121 words
A premix fuel/oxidant burner with velocity and fuel/air ratio control comprising: a nozzle having a nozzle wall forming a Venturi mixer and a nozzle exit; means for separately introducing fuel and oxidant into said nozzle; a hollow body disposed inside said nozzle, said hollow body moveable in a longitudinal direction toward said nozzle exit; said hollow body having at least one orifice through a wall of said hollow body at an angle with respect to a longitudinal axis of said nozzle; and flow control means for controlling a flow of said fuel through said orifice disposed at an inlet side of said orifice, said flow control means comprising a fixed orifice baffle secured to said means for moving said hollow body.
Claim 3
Dependent Claim
40 words
A premix fuel/oxidant burner in accordance with claim 1, wherein said hollow body has a shape whereby the cross-sectional area of said Venturi mixer and said nozzle exit is reduced as said hollow body is moved toward said nozzle exit.
Claim 4
Dependent Claim
30 words
A premix fuel/oxidant burner in accordance with claim 1, wherein said hollow body is in communication with said means for introducing fuel, said fuel being directed inside said hollow body.
Claim 5
Dependent Claim
33 words
A premix fuel/oxidant burner in accordance with claim 1, wherein said means for introducing said fuel into said nozzle comprises means for cooling an end of said hollow body facing said nozzle exit.
Claim 6
Dependent Claim
56 words
A premix fuel/oxidant burner in accordance with claim 4, wherein said means for cooling said end of said hollow body facing said nozzle exit comprises a flow baffle disposed at an outlet of said means for introducing said fuel, said flow baffle directing a stream of said fuel to contact said end of said hollow body.
Claim 7
Dependent Claim
44 words
A premix fuel/oxidant burner in accordance with claim 1, wherein said means for moving said hollow body comprises a slide means connected to said means for introducing said fuel, said means for introducing said fuel comprising a tubular member extending into said hollow body.
Claim 8
Dependent Claim
33 words
A premix fuel/oxidant burner in accordance with claim 1, further comprising a combustion chamber wall forming a combustion chamber downstream of said nozzle exit, said nozzle exit in communication with said combustion chamber.
Claim 9
Dependent Claim
64 words
A premix fuel/oxidant air burner in accordance with claim 7, wherein a refractory sleeve is disposed inside said combustion chamber forming an annular space between said refractory sleeve and said combustion chamber wall whereby flue gases resulting from the combustion of said premixed fuel and oxidant are recirculated from a downstream end of said combustion chamber through said annular space toward said nozzle exit.
References Cited (Backward Citations)
US1702298A
Cited
US1127815A
Cited
US1289042A
Cited
US1434238A
Cited
US1490008A
Cited
US1667365A
Cited
US1695215A
Cited
US1763387A
Cited
US2316881A
Cited
US2368178A
Cited
US3091283A
Cited
US3533717A
Cited
US3721387A
Cited
US3782884A
Cited
US3915621A
Cited
US4755136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-30 | 1997-03-01 | 1997-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-30 | 2001-03-01 | 2001-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-30 | 2005-03-01 | 2005-08-31 | $7700.00 | Window Closed / Lapsed |