Application of reburning for NO(x) control to a firetube package boiler. Report for April 1983-March 1984

Technical Report · Fri Jun 01 04:00:00 EDT 1984

OSTI ID:6558365

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 percent from an uncontrolled NOx emission of 200 ppm was realized by diverting 15 percent 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 has been 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: 6558365
• Report Number(s): PB-84-211259; EPA/600-D-84/170
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
AFTERBURNERS
AIR POLLUTION CONTROL
BOILERS
CHALCOGENIDES
COMBUSTION PRODUCTS
CONTROL
ENERGY SOURCES
EQUIPMENT
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
INDUSTRIAL WASTES
NATURAL GAS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
WASTES