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US 9,995,483 B2Granted
Burner with oxygen and fuel mixing apparatus
AssigneeHoneywell International Inc.
InventorCurtis Taylor
Life of this patent
Estimating the term…
Abstract
An apparatus is provided for combining oxygen and fuel to produce a mixture to be burned in a burner. The oxygen-fuel mixture is ignited in a fuel-ignition zone in a flame chamber to produce a flame.
Claims20
A method for combining recycled flue gas, oxygen, and fuel to produce an ignitable fluid, comprising:
- mixing a primary stream of oxygen from a primary oxygen supply tube of a combustion system with pulverized fuel and a transport gas from a fuel supply tube of the combustion system to produce a combustible oxygen-fuel mixture;
- combining a secondary stream of oxygen and a stream of recycled flue gas to produce a stream of oxygen-enriched flue gas that is separate from the combustible oxygen-fuel mixture, wherein combining the secondary stream of oxygen and the stream of recycled flue gas includes:
- receiving, by a plenum formed between the primary oxygen supply tube and a secondary oxygen supply tube arranged to surround the primary oxygen supply tube, the secondary stream of oxygen;
- and
- discharging, from the plenum in a radial direction toward a central axis extending through the fuel supply tube, the secondary stream of oxygen to combine with the stream of recycled flue gas in the recycled flue gas passage,
- wherein the secondary oxygen supply tube includes an annular downstream portion separated from the primary oxygen supply tube and formed to include the plenum and the oxygen discharge outlet and a tubular upstream portion coupled to the annular downstream portion and arranged to lie in spaced-apart side-by-side relation to the primary oxygen supply tube;
- and
- combining the stream of oxygen-enriched flue gas and the combustible oxygen-fuel mixture to produce an ignitable fluid.
5 more elements
A method for combining recycled flue gas, oxygen, and fuel to produce an ignitable fluid, comprising:
- mixing a primary stream of oxygen from a primary oxygen supply tube of a combustion system with fuel and a transport gas from a fuel supply tube of the combustion system to produce a combustible oxygen-fuel mixture;
- combining a secondary stream of oxygen and a stream of recycled flue gas to produce a stream of oxygen-enriched flue gas that is separate from the combustible oxygen-fuel mixture, wherein combining the secondary stream of oxygen and the stream of recycled flue gas includes:
- receiving, by a plenum formed between a secondary oxygen supply tube of the combustion system and the primary oxygen supply tube, the secondary stream of oxygen;
- and
- discharging, from the plenum through an oxygen-discharge outlet arranged to open into the plenum, the secondary stream of oxygen into a recycled flue gas passage of the combustion system to combine with the stream of recycled flue gas in the recycled flue gas passage,
- wherein the secondary oxygen supply tube includes an annular downstream portion separated from the primary oxygen supply tube and formed to include the plenum and the oxygen discharge outlet and a tubular upstream portion coupled to the annular downstream portion and arranged to lie in spaced-apart side-by-side relation to the primary oxygen supply tube;
- and
- combining the stream of oxygen-enriched flue gas and the combustible oxygen-fuel mixture to produce an ignitable fluid.
5 more elements
A method for combining recycled flue gas, oxygen, and fuel to produce an ignitable fluid, comprising:
- mixing a primary stream of oxygen from a primary oxygen supply tube of a combustion system with pulverized fuel and a transport gas from a fuel supply tube of the combustion system to produce a combustible oxygen-fuel mixture having an oxygen concentration that is different than 20.9%;
- combining the secondary stream of oxygen and a stream of recycled flue gas to produce a stream of oxygen-enriched flue gas that is separate from the combustible oxygen-fuel mixture and has an oxygen concentration that is different than 20.9%, wherein combining the secondary stream of oxygen and the stream of recycled flue gas includes:
- receiving, by a plenum formed between the primary oxygen supply tube and a second oxygen supply tube arranged to surround the primary oxygen supply tube, a secondary stream of oxygen;
- and
- discharging, from the plenum through an oxygen-discharge outlet arranged to open into the plenum, the secondary stream of oxygen into a recycled flue gas passage of the combustion system to combine with the stream of recycled flue gas in the recycled flue gas passage;
- wherein the secondary oxygen supply tube includes an annular downstream portion separated from the primary oxygen supply tube and formed to include the plenum and the oxygen discharge outlet and a tubular upstream portion coupled to the annular downstream portion and arranged to lie in spaced-apart side-by-side relation to the primary oxygen supply tube;
- and
- combining the stream of oxygen-enriched flue gas and the combustible oxygen-fuel mixture to produce an ignitable fluid having an oxygen concentration of at least 20.9%.
5 more elements
Dependencies are inferred from the claim text.