Effects of design and operating variables on NO/sub x/ from coal-fired furnaces. Phase II. Final report
Results are presented of an investigation of combustion modification techniques for controlling NOx emissions that have application to pulverized coal-fired utility boilers. The techniques, studied on a 5 million Btu/hr single-burner pilot unit, included: excess air, air preheat, firing rate, flue gas recirculation, staged, combustion, quench, and swirl. Tests conducted with a Colorado coal showed that NOx reduction of up to 65 percent was possible by using staged combustion or by lowering excess air levels from 30 to zero percent. Flue gas recirculation yielded only moderate NOx reductions for coal. For existing units, control of excess air appears to be the simplest method for NOx reduction. Where possible, staged combustion could be retrofitted on existing units to achieve further NOx reductions. For new units, staged combustion combined with low excess air firing appears to be the most promising method for NOx control. (GRA)
- Research Organization:
- Babcock and Wilcox Co., Lynchburg, Va. (USA). Research and Development Div.
- DOE Contract Number:
- EPA-68-02-0634
- OSTI ID:
- 7295357
- Report Number(s):
- PB-241283
- Resource Relation:
- Other Information: See also PB--229986
- Country of Publication:
- United States
- Language:
- English
Similar Records
Environmental assessment of utility boiler combustion modification NO/sub x/ controls: Volume 1. Technical results. Final report, March 1977-May 1978
Environmental assessment of utility boiler combustion modification NO/sub x/ controls: Volume 2. Appendices. Final report, March 1977-May 1978
Related Subjects
01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
BOILERS
CHEMICAL EFFLUENTS
FLUE GAS
DENITRIFICATION
NITROGEN OXIDES
CONTROL
COAL
COMBUSTION
GAS FLOW
GASEOUS WASTES
STOICHIOMETRY
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
ENERGY SOURCES
FLUID FLOW
FOSSIL FUELS
FUELS
NITROGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
010800 - Coal
Lignite
& Peat- Waste Management
010900 - Coal
Lignite
& Peat- Environmental Aspects
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)