Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Reexamination Certificate
2008-05-20
2008-05-20
Johnson, Edward M. (Department: 1793)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
Reexamination Certificate
active
07374735
ABSTRACT:
A method of decreasing the concentration of nitrogen oxides in a combustion gas flowing through a vessel including the steps of: generating a flue gas in a combustion zone of the vessel, the flue gas containing nitrogen oxides and carbon monoxide; providing overfire air into a burnout zone of the vessel from a first injector of the overfire air to oxidize at least some of the carbon monoxide in the flue gas; injecting a selective reducing agent concurrent with the overfire air at a level in the burnout zone downstream of the first injector of overfire air and downstream of the oxidization of the carbon monoxide; and reacting the selective reducing agent with the flue gas to reduce the nitrogen oxides.
REFERENCES:
patent: 4250820 (1981-02-01), Lautenschläger
patent: 4253409 (1981-03-01), Wormser
patent: 4501204 (1985-02-01), McCartney et al.
patent: 4532872 (1985-08-01), Anderson
patent: 4699071 (1987-10-01), Vier et al.
patent: 4739713 (1988-04-01), Vier et al.
patent: 4915039 (1990-04-01), Ringel
patent: 4926765 (1990-05-01), Dreizler et al.
patent: 5085674 (1992-02-01), Leavitt
patent: 5139755 (1992-08-01), Seeker et al.
patent: 5154599 (1992-10-01), Wunning
patent: 5195450 (1993-03-01), Marion
patent: 5347958 (1994-09-01), Gordon, Jr.
patent: 5425317 (1995-06-01), Schaub et al.
patent: 5536482 (1996-07-01), Diep et al.
patent: 5626088 (1997-05-01), Hiltunen et al.
patent: 5915310 (1999-06-01), Hura et al.
patent: 5934892 (1999-08-01), Rabovitser et al.
patent: 5937772 (1999-08-01), Khinkis et al.
patent: 5967061 (1999-10-01), Ashworth et al.
patent: 6039560 (2000-03-01), Kubota
patent: 6048510 (2000-04-01), Zauderer
patent: 6058855 (2000-05-01), Ake et al.
patent: 6199494 (2001-03-01), Griffin
patent: 6206685 (2001-03-01), Zamansky et al.
patent: 6244200 (2001-06-01), Rabovitser et al.
patent: 6280695 (2001-08-01), Lissianski et al.
patent: 6318277 (2001-11-01), Kokkinos
patent: 6325002 (2001-12-01), Ashworth
patent: 6325003 (2001-12-01), Ashworth
patent: WO 97/25134 (1997-07-01), None
patent: WO 200021647 (2000-04-01), None
U.K. Search Report for GB0412032.5.
Vitali V. Lissianski et al, “Optimization of Advanced Reburning Via Modeling”, presented at the 28thSymposium (International) on Combustion, University of Edinburgh, Scotland, Jul. 30-Aug. 4, 2000, pp. 1-9.
Moyeda David Kelly
Payne Roy
Swanson Larry William
Zhou Wei
General Electric Company
Johnson Edward M.
Nixon & Vanderhye P.C.
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