Burner method and apparatus having low emissions
First Claim
1. A gas burner for heating objects having a supply of gas under pressure which is to be mixed to achieve a combustible mixture, gas flow line connecting to said burner to said supply, a burner means for mixing air with said fluid fuel to achieve said combustible mixture, characterized by said burner means includes one or more jet forming means for issuing one or more jets of said gas having a given cross-sectional area and sweeping said one or more jets of gas in ambient air downstream of said burner means to mix air with said gas and achieve said combustible mixture a distance spaced from any physical structure of said burner means whereby a flame front of burning combustible mixture has a broad shape and is spaced a predetermined distance from said burner.
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Accused Products
Abstract
A low NOx gas burner for heating objects having a supply of gas under pressure which is to be mixed to achieve a combustible mixture, gas flow line connecting to said burner to said supply, a burner means for mixing air with said fluid fuel to achieve said combustible mixture, characterized by said burner means includes one or more jet forming means for issuing one or more jets of said gas having a given cross-sectional area and sweeping said one or more jets of gas in ambient air downstream of said burner means to mix air with said gas and achieve said combustible mixture a distance spaced from any physical structure of said burner means whereby a flame front of burning combustible mixture has a broad shape and is spaced a predetermined distance from said burner.
17 Citations
28 Claims
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1. A gas burner for heating objects having a supply of gas under pressure which is to be mixed to achieve a combustible mixture, gas flow line connecting to said burner to said supply, a burner means for mixing air with said fluid fuel to achieve said combustible mixture, characterized by said burner means includes one or more jet forming means for issuing one or more jets of said gas having a given cross-sectional area and sweeping said one or more jets of gas in ambient air downstream of said burner means to mix air with said gas and achieve said combustible mixture a distance spaced from any physical structure of said burner means whereby a flame front of burning combustible mixture has a broad shape and is spaced a predetermined distance from said burner.
- 2. A burner system for mixing fuel with air to attain a combustible fuel-air-mixture, comprising, a nozzle for creating a jet of said fuel and means for oscillating said jet of fuel in the ambient air downstream of said means for oscillating to achieve said combustible fuel-air-mixture at a distance spaced downstream from said means for sweeping.
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10. In a system for heating objects, said system having a supply of fluid fuel under pressure which is to be stoichiometrically mixed to achieve a combustible mixture, fluid fuel flow line connected to said fluid fuel under pressure, control valve in said fluid fuel flow line, a burner means for mixing air with said fluid fuel to achieve said combustible mixture, characterized by said burner means includes a fluidic oscillator for forming a sheet of said fluid fuel and oscillating said sheet of fluid fuel in ambient air downstream of said fluidic oscillator to mix air with said fuel and achieve said combustible mixture a distance spaced from any physical structure of said burner whereby a flame front of burning combustible mixture has a broad shape and is spaced a distance from said fluidic oscillator which is a function of the cross-sectional area of said nozzle.
- 11. A gas burner comprising a nozzle means forming a gas jet and means for causing said gas jet to be swept in a pattern and at a rate sufficient to cause 1) the flame to be cooler, 2) NOx emissions to be reduced over a wide firing range, 3) heat efficiency is improved, and (4) the flame to be spaced a distance in ambient air downstream of said burner, such that said nozzle means remains relatively cool.
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18. In a blue flame gas burner having a burner nozzle having an axis, a low cost method of reducing NOx emissions, improving thermal efficiency, causing the flame to burn cooler and keeping the burner nozzle cooler, comprising:
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1) forming the gas in a jet along the axis of said nozzle, 2) projecting said jet into ambient air, and 3) causing said jet to sweep in a pattern transverse to said axis and at a predetermined rate. - View Dependent Claims (19, 20, 21, 22)
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- 23. A low emission gas burner having a combustion zone comprising, means for forming a jet of gas and means for sweeping said jet in a circular pattern to form a helical jet pattern in advance of said combustion zone.
- 27. In a system for heating objects, said system having a supply of fluid fuel under pressure which is to be stoichiometrically mixed with air to achieve a combustible mixture, a fluid fuel flow line connected to said supply of fluid fuel under pressure, control valve in said fluid fuel flow line, a burner means for mixing air with said fluid fuel to achieve said combustible mixture, characterized by said burner mean includes a plurality of fluidic oscillators, each fluidic oscillator issuing a jet of said fluid fuel in a predetermined direction and causing said jet of fluid fuel sweep in ambient air downstream of said combustible mixture a distance spaced from any physical structure of said burner whereby a flame front of burning combustible mixture is spaced a distance from each said fluidic oscillator, respectively.
Specification