Application of reburning for NOx control to a firetube package boiler (journal version)

Technical Report · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5812872

Mulholland, J A; Lanier, W S

The paper describes the use of a 730-kW (2.5 million Btu/hr) firetube package boiler, to demonstrate the application of reburning for NOx emission control. An overall reduction of 50% from an uncontrolled NOx emission of 200 ppm was realized by diverting 15% of the total boiler load to a natural-gas-fired second-stage burner. Tests indicate that the overall order of destruction (with respect to initial NOx) is greater than one; thus, larger reductions can be expected from reburning applications to systems with higher initial NOx. Rich zone stoichiometry was identified as the dominant process variable. Primary zone stoichiometry and rich-zone residence time are parameters that can be adjusted to maximize NOx reduction. Reburning applied to firetube package boilers requires minimal facility modification. Natural gas would appear to be an ideal reburning fuel, because nitrogen in the reburning fuel has been shown to inhibit NOx reduction.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (USA). Industrial Environmental Research Lab.
• OSTI ID: 5812872
• Report Number(s): PB-86-169877/XAB; EPA/600/J-85/326
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
033000 -- Natural Gas-- Properties & Composition
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION PRODUCTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
NATURAL GAS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
THERMOCHEMICAL PROCESSES