Patent ID: 8728412
Filing Date: 2014-05-20
Classification: B01D,F23J

Abstract:
1. A combustion chamber exhaust system comprising: a combustion gas exhaust duct coupled in flow communication with a combustion chamber; a first transport line coupled in flow communication with said combustion exhaust duct that contains a supply of combustion gases including oxides of nitrogen (NO a heat exchanger coupled to said first transport line downstream of said combustion gas exhaust duct, said heat exchanger facilitates decreasing a temperature of the extracted exhaust gases; at least one recirculation fan coupled downstream from said heat exchanger, said at least one recirculation fan configured to extract a portion of the extracted exhaust gas from said heat exchanger for use as a carrier gas, the carrier gas having a lower temperature and a higher pressure than a temperature and a pressure of the extracted exhaust gas; a vaporizer chamber coupled downstream from said at least one recirculation fan, said vaporizer chamber configured to: a flame arrestor positioned within said vaporizer chamber, said flame arrestor including a plurality of packing beads configured to prevent combustion of the mixture and to efficiently mix the vaporized liquid hydrocarbon-based reducing agent and the carrier gas; and a second transport line coupled in flow communication with said vaporizer chamber, said second transport line configured to channel the mixture to an agent injection grid (AIG) positioned upstream from a selective catalyst reduction (SCR) system, wherein said heat exchanger is configured to indirectly cool the extracted exhaust gases to facilitate preventing combustion of the mixture downstream from said AIG, said SCR comprising a catalytic bed configured to facilitate reducing NO