System and method for reducing emissions from a boiler
AssigneeGeneral Electric Technology GmbH
InventorsShin Gyoo Kang, Armand Alfred Levasseur, Robert A. Schrecengost
Life of this patent
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Abstract
A system and method for reducing emissions from a boiler. A boiler generally has a combustion area. The system further includes a fuel pipe for delivering fuel. The system further includes a conduit. A bore extends through the conduit. The bore of the conduit is in fluid communication with the fuel pipe and the combustion area of the boiler. A pre-ignition source is positioned in the conduit. The pre-ignition source operates to pre-ignite at least a portion of the fuel flowing through the conduit.
Claims19
A system for reducing emissions in a boiler having a combustion area, comprising:
- a plurality of coal supply elevations in the combustion area, each fuel supply elevation including a conduit having a bore extending there through, the bore being in fluid communication with a fuel pipe and the combustion area of the boiler;
- and
- a pre-ignition source positioned in the conduit disposed at the lowest fuel supply elevation and operable to pre-ignite at least a portion of the fuel flowing through conduit prior to the fuel entering the combustion area;
- wherein the conduit disposed above the lowest fuel supply elevation does not include a pre-ignition source to pre-ignite any portion of the fuel flowing there through.
A method for reducing emissions in a boiler having a, first fuel elevation, a second fuel elevation, a third fuel elevation, a fourth fuel elevation, and a fifth fuel elevation, each of the first through fifth fuel elevations comprising a respective nozzle operable to deliver a fuel to a combustion area of the boiler, the method comprising:
- delivering fuel to the combustion zone of the boiler through the nozzles associated with the first fuel elevation and the second fuel elevation;
- pre-igniting at least a portion of the fuel provided to the nozzles associated with the first fuel elevation and the second fuel elevation;
- prior to delivering the fuel through the nozzles associated with the first fuel elevation and the second fuel elevation;
- wherein fuel delivered through the nozzles associated with the first fuel elevation and the second fuel elevation flows through a conduit before it flows through the nozzles associated with the first fuel elevation and the second fuel elevation, and is pre-ignited in the conduit, and wherein respective conduits on the third, fourth, and fifth elevations do not operate to pre-ignite any portion of pulverized coal flowing through those respective conduits.
Dependencies are inferred from the claim text.