F - Mech Eng,Light,Heat,Weapons – 23 – D
Patent
F - Mech Eng,Light,Heat,Weapons
23
D
F23D 3/40 (2006.01) F23C 6/04 (2006.01) F23C 99/00 (2006.01)
Patent
CA 2087438
2087438 9201890 PCTABS00010 Low NOx combustion is effected by a method wherein a fuel, e.g., natural gas, and a source of oxygen, e.g., air, are mixed and the mixture is combusted in at least two successive combustion zones filled with a porous matrix, the void spaces of which provide sites at which substantially all of the said combustion occurs; viz. a first zone wherein the mixture is fuel-rich, and a second zone wherein the mixture is fuel-lean. Preferably, the method utilizes an additional combustion zone which precedes or is upstream of the first zone and is filled with a said porous matrix, wherein the mixture is fuel-lean. Apparatus (110) for low NOx combustion is also provided which includes an arrangement (116, 118, 120, 115, 117) for mixing fuel and oxygen, and at least first and second combustion zones (132, 134) filled with a said porous matrix, and means for providing a fuel-oxygen mixture to said first zone (132) which is fuel-rich, and for adjusting the resulting combustion products flowed to the second zone (134) with additional fuel and oxygen (138, 139) as to provide a fuel-lean mixture therein. Preferably, the apparatus also includes a zone or stage (152) filled with a said porous matrix (155) which precedes or is upstream of the first zone (132), to which the fuel and oxygen are initially provided as to establish fuel-lean conditions therein.
Bell Ronald D.
Gardiner William C.
Howell John R.
Matthews Ronald D.
Nichols Steven P.
Bell Ronald D.
Board Of Regents The University Of Texas System
Gardiner William C.
Howell John R.
Matthews Ronald D.
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