Low NO{sub x} slag tap firing for a low emission boiler system

Conference · Wed Jul 01 04:00:00 EDT 1998

OSTI ID:20012913

Beittel, R; Ake, T

DB Riley, Inc. was recently awarded the proof of concept phase of the US Department of Energy Low Emission Boiler System (LEBS) program to develop the next major advancement in pulverized coal burning technology. The DB Riley project team has developed a 400 MWe Commercial Generating Unit (CGU) design meeting all environmental and efficiency goals. The LEBS design is based on a low-NO{sub x} U-fired slag tap firing system. Low NO{sub x} slag tap firing has been demonstrated in a 100 million Btu/hr (29 MW) U-fired test facility for a high sulfur, Illinois coal, and a medium sulfur Appalachian coal, at less than 0.2 lb/million Btu (0.086 g/MJ) of NO{sub x} while converting the coal ash into a low volume, inert, and non-leachable solid. The result is an 80% reduction in NO{sub x} emissions typical of commercial slagging boilers. The authors obtained this low NO{sub x} emission firing with DB Riley's CCV {reg{underscore}sign} dual air zone burner in combination with either air staging alone or with coal reburning. They also tested a baseline burner that simulated burners in commercially operating slagging boilers. The baseline burner matched the trends and the absolute value of NO{sub x} emission in the commercial boilers, validating the test facility results. The firing system and LEBS emission control components will be demonstrated in a Proof of Concept (POC) facility.

• Research Organization: DB Riley, Inc., Worcester, MA (US)
• Sponsoring Organization: US Department of Energy
• DOE Contract Number: AC22-92PC92158
• OSTI ID: 20012913
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
AIR POLLUTION ABATEMENT
BITUMINOUS COAL
BOILERS
BURNERS
COMBUSTION PRODUCTS
DESIGN
NITROGEN OXIDES
PULVERIZED FUELS
RECYCLING
STAGED COMBUSTION