Furnaces – Utilizing powdered fuel – Having rotary flow means
Patent
1992-03-13
1993-04-27
Favors, Edward G.
Furnaces
Utilizing powdered fuel
Having rotary flow means
110263, 110265, 431174, 431178, 431179, 431180, F23D 102
Patent
active
052052265
ABSTRACT:
A low NO.sub.x burner system for a furnace having spaced apart front and rear walls, comprises a double row of cell burners on each of the front and rear walls. Each cell burner is either of the inverted type with a secondary air nozzle spaced vertically below a coal nozzle, or the non-inverted type where the coal nozzle is below the secondary air port. The inverted and non-inverted cells alternate or are provided in other specified patterns at least in the lower row of cells. A small percentage of the total air can be also provided through the hopper or hopper throat forming the bottom of the furnace, or through the boiler hopper side walls. A shallow angle impeller design also advances the purpose of the invention which is to reduce CO and H.sub.2 S admissions while maintaining low NO.sub.x generation.
REFERENCES:
patent: 4150631 (1979-04-01), Frey et al.
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patent: 5020454 (1991-06-01), Hellewell et al.
Comprehensive Report to Congress--Clean Coal Technology Program, U.S. Department of Energy--Jul. 1990-DOE/FE-0197P-pp. 1-35.
Babcock & Wilcox Technical Paper BR-1370-"NO.sub.x Control Update--1989"-LaRue & Cioffi, Presented to 1989 Jt. Symposium on Stationary Combustion NO.sub.x Contro-San Francisco, Calif.-Mar. 5-9, 1989.
Babcock & Wilcox Technical Paper BR-1392-"Coal-Fired NO.sub.x Emission Control Technologies"-Kitto, LaRue & Kulig, Presented to 6th Annual International Pittsburgh Coal Conference-Pittsburgh, Pa.-Sep. 25-29, 1989.
Babcock & Wilcox Technical Paper PGTP85-18-"Utility Steam Generator NO.sub.x Control Update-1985"-LaRue, Acree & Cioffi, Presented to 1985 Joint Symposium on Stationary Combustion NO.sub.x Control-Boston, Mass.-May 6-9, 1985.
Babcock & Wilcox Paper Titled "Development of Low NO.sub.x Cell Burners for Retrofit Applications"-LaRue & Rodgers, presented at a 1985 Joint EPA/EPRI NO.sub.x Symposium in Boston, Mass.-May, 1985-17 pages.
Asme Paper 86-JPGC-FACT-G-"Development of a Retrofit Low NO.sub.x Cell Burner"-Clark LaRue, Liang & Eskinazi-Presented at the Jt. Asme/IEEE Power Gen. Conference-Portland, Or.-Oct. 19-23, 1986.
Babcok & Wilcox Environmental Systems Information Brochure Dated Nov. 15, 1990-"LNCB.TM.-Low-NO.sub.x Cell Burner" .RTM.1990 The Babcock & Wilcox Company.
Babcock & Wilcox Technical Paper-"NO.sub.x Control Update-1987"LaRue & Ciffi, Presented to Jt. Symposium on Stationary Combustion NO.sub.x Control-New Orleans, L.A.-Mar. 23-27, 1987 Paper No. BR-1306.
Babcock & Wilcox Technical Paper PGTP87-13-"Large Scale Testing and Development of the B & W Low NO.sub.x Cell Burner"-Clark, LaRue, Liang & Eskuazi, Presented to Jt. Symposium on Stationary Combustion NO.sub.x Control-New Orleans, L.A.-Mar. 23-27, 1987.
Babcock & Wilcox Technical Paper BR-1352A (RdTPA 88-34)-"NO.sub.x Emission Reductions-Selected Coal-Fired Retrofit Options"-Kulig & Kitto, Jr.-Presented at the Power Gen Conference, Orlando, Fla.-Dec. 6-8, 1988.
B&W Paper-"Retrofit Comb. Modifications for NO.sub.x Control in Utility Boilers-From Pilot Scale to Full-Scale Development"-Rodgers, et al Presented at the 1990 Fall Symposium-American Flame Research Committee-San Francisco, Calif.-Oct. 8-10, 1990.
Babcock & Wilcox Technical Paper BR-1452 -"Update on B & W Low NO.sub.x Combustion Systems"-LaRue et al-Presented to Intl. Jt. Pwr, Gen. Conference-San Diego, Calif., Oct. 6-10, 1991.
B & W Paper Titled "Use of Numerical Modeling in the Design of a Low-NO.sub.x Burner for Utility Boilers"-Fiveland & Latham-Presented to 1st Intl. Conf. on Comb. Technologies for A Clean Environemnt-Sep. 3-6, 1991-Vilamoura, Portugal.
Draft of a B & W Technical Paper BR-1474-"Preliminary Results from Phase II, Group II Low-NO.sub.x Clean Coal Retrofit Demonstrations"-Kleisley, et al-To Be Presented at Air & Waste Mgt. Assoc. Conf., Kansas City, Mo.-Jun. 21-26, 1992 (Mailed Mar. 16, 1992).
Kitto, Jr. John B.
Kleisley Roger J.
LaRue Albert D.
Latham Chris E.
Laursen Thomas A.
Edwards Robert J.
Favors Edward G.
Marich Eric
Matas Vytas R.
The Babcock & Wilcox Company
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