Reburning application to firetube package boilers. Final report, May 1983-September 1985

Technical Report · Sun Mar 01 04:00:00 EST 1987

OSTI ID:6354634

Mulholland, J A; Stephenson, E E; Pendergraph, C; Ryan, J V

The report gives results of pilot-scale experimental research that examined the physical and chemical phenomena associated with the NOx control technology of reburning applied to gas- and liquid-fired firetube package boilers. Reburning (staged fuel combustion) diverts some of the fuel and combustion air from the main burner(s) for injection into the post-flame gases, resulting in three distinct zones in the boiler radiant section: a fuel-lean primary zone, a fuel-rich reburning zone, and a fuel-lean burnout zone. NOx is reduced both by reduction of NOx formation and by destruction of primary-flame NOx by secondary-fuel radicals. The research showed that, with minimal facility modification, NOx emissions from a firetube package boiler can be reduced by 50% or more from an initial level of 200 ppm (measured dry, at zero % O2). Several hypotheses were evaluated in the study. Results indicate that the overall NOx reduction via reburning has a reaction rate order of about 1.5 with respect to primary NOx.

• Research Organization: Acurex Corp., Mountain View, CA (USA)
• OSTI ID: 6354634
• Report Number(s): PB-87-177515/XAB
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000 -- Engineering-- Combustion Systems
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
CONTROL
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUEL OILS
FUELS
FUNCTIONAL MODELS
GAS FUELS
GASES
LIQUID FUELS
NATURAL GAS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PILOT PLANTS
POLLUTION CONTROL
THERMOCHEMICAL PROCESSES