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Low NO{sub x} burner modifications to front-fired pulverized coal boilers

Abstract

Madison Gas and Electric Blount Street Station Units 8 and 9 are Babcock and Wilcox pulverized coal fired and natural gas fired boilers. These boilers were build in the late 1950's and early 1960's with each boiler rated at 425,000 lb./hr of steam producing 50 MW of electricity. The boilers are rated at 9,500 F at 1,350 psig. Each unit is equipped with one Ljungstroem air heater and two B and W EL pulverizers. These units burn subbituminous coal with higher heating value of 10,950 Btu/LB on an as-received basis. The nitrogen content is approximately 1.23% with 15% moisture. In order to comply with the new Clean Air Act Madison Gas and Electric needs to reduce NO{sub x} on these units to less than .5 LB/mmBtu. Baseline NO{sub x} emissions on these units range between .8--.9 lb./mmBtu. LOIs average approximately 8%. Madison Gas and Electric contracted with RJM Corporation to modify the existing burners to achieve this objective. These modifications consisted of adding patented circumferentially and radially staged flame stabilizers, modifying the coal pipe, and replacing the coal impeller with a circumferentially staged coal spreader. RJM Corporation utilized computational fluid dynamics modeling in order to design the equipment to modify  More>>
Publication Date:
Jul 01, 1998
Product Type:
Conference
Report Number:
CONF-971214-
Reference Number:
EDB-00:038864
Resource Relation:
Conference: 10th International Conference and Exhibition for the Power Generating Industries, Dallas, TX (US), 12/09/1997--12/11/1997; Other Information: PBD: [1998]; Related Information: In: Power-Gen '97 International, [2000] pages.
Subject:
20 FOSSIL-FUELED POWER PLANTS; 01 COAL, LIGNITE, AND PEAT; 03 NATURAL GAS; FOSSIL-FUEL POWER PLANTS; SUBBITUMINOUS COAL; NITROGEN OXIDES; AIR POLLUTION CONTROL; BURNERS
OSTI ID:
20050931
Research Organizations:
RJM Corp. (US)
Country of Origin:
United States
Language:
English
Other Identifying Numbers:
TRN: IM200026%%2
Availability:
PennWell Power Generation Group, 1421 S. Sheridan, Tulsa, OK 74112 (US); $195.00. Prices may become outdated.
Submitting Site:
DELTA
Size:
8 pages
Announcement Date:

Citation Formats

Broderick, R G, and Wagner, M. Low NO{sub x} burner modifications to front-fired pulverized coal boilers. United States: N. p., 1998. Web.
Broderick, R G, & Wagner, M. Low NO{sub x} burner modifications to front-fired pulverized coal boilers. United States.
Broderick, R G, and Wagner, M. 1998. "Low NO{sub x} burner modifications to front-fired pulverized coal boilers." United States.
@misc{etde_20050931,
title = {Low NO{sub x} burner modifications to front-fired pulverized coal boilers}
author = {Broderick, R G, and Wagner, M}
abstractNote = {Madison Gas and Electric Blount Street Station Units 8 and 9 are Babcock and Wilcox pulverized coal fired and natural gas fired boilers. These boilers were build in the late 1950's and early 1960's with each boiler rated at 425,000 lb./hr of steam producing 50 MW of electricity. The boilers are rated at 9,500 F at 1,350 psig. Each unit is equipped with one Ljungstroem air heater and two B and W EL pulverizers. These units burn subbituminous coal with higher heating value of 10,950 Btu/LB on an as-received basis. The nitrogen content is approximately 1.23% with 15% moisture. In order to comply with the new Clean Air Act Madison Gas and Electric needs to reduce NO{sub x} on these units to less than .5 LB/mmBtu. Baseline NO{sub x} emissions on these units range between .8--.9 lb./mmBtu. LOIs average approximately 8%. Madison Gas and Electric contracted with RJM Corporation to modify the existing burners to achieve this objective. These modifications consisted of adding patented circumferentially and radially staged flame stabilizers, modifying the coal pipe, and replacing the coal impeller with a circumferentially staged coal spreader. RJM Corporation utilized computational fluid dynamics modeling in order to design the equipment to modify these burners. The equipment was installed during the March 1997 outage and start-up and optimization was conducted in April 1997. Final performance results and economic data will be included in the final paper.}
place = {United States}
year = {1998}
month = {Jul}
}