Low NOx modifications on front-fired pulverized coal fuel burners
Technical Report
·
OSTI ID:269432
- Public Service of New Hampshire, Manchester, NH (United States)
- RJM Corp., Ridgefield, CT (United States)
Burner optimizations and modifications were performed on Public Service of New Hampshire`s Schiller Units 4, 5, and 6. These are Foster-Wheeler 50 MWg pulverized coal and No.6 fuel oil-fired boilers with six burners each. Burner optimizations consisted of fuel flow, primary air, secondary air testing and balancing. Burner modifications consisted of the addition of circumferentially and radially staged flame stabilizers, circumferentially-staged coal spreaders, and modifications to the existing pulverized coal pipe. NO{sub x} emissions on Unit 6 of .41 lb/mmBtu were achieved at optimized burner settings at full load with all burners in service and without the use of overfire air or bias firing. This represented a 50% NO{sub x} reduction from the average pre-modification baseline NO{sub x} emissions of .81 lb/mmBtu prior to the optimizations and burner modification program. NO{sub x} emissions as low as .38 lb/mmBtu were achieved with the use of overfire air. There was essentially no quantifiable change in LOIs (baseline LOIs averaged 40%). Furnace excess O{sub 2} as low as 1.2% was achieved with CO emissions of less than 200 ppm. Total installed costs including the overfire air system were approximately $7/kW.
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (United States)
- OSTI ID:
- 269432
- Report Number(s):
- EPRI-TR--105978-V1; CONF-9505150--Vol.1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Low NO{sub x} burner modifications to front-fired pulverized coal boilers
Low NO{sub x} burners and heat transfer surface modifications for a successful conversion to Powder River Basin fuel on a wall fired boiler
Performance of a controlled flow/split flame low-NOx burner system on a tangentially fired boiler
Conference
·
Wed Jul 01 00:00:00 EDT 1998
·
OSTI ID:20050931
Low NO{sub x} burners and heat transfer surface modifications for a successful conversion to Powder River Basin fuel on a wall fired boiler
Conference
·
Mon Dec 30 23:00:00 EST 1996
·
OSTI ID:427852
Performance of a controlled flow/split flame low-NOx burner system on a tangentially fired boiler
Technical Report
·
Sun Dec 31 23:00:00 EST 1995
·
OSTI ID:269428