Laboratory evaluation of In-Furnace-NO /SUB x/ -Reduction for industrial combustion applications

Conference · Sat Sep 01 04:00:00 EDT 1984 · Am. Soc. Mech. Eng., (Pap.); (United States)

OSTI ID:6223094

Yang, R J; Arand, J K; Garcia, F J

The applicability and effectiveness of the InFurnace-NO /SUB x/ -Reduction (reburning) process in controlling nitrogen oxides (NO /SUB x/ ) emissions from refinery process heaters and cement kilns were studied in a natural gas-fired 38 kW (130,000 Btu/hr) subscale process heater simulator and a natural gas/coal-fired 50 kW (170,000 Btu/hr) subscale cement kiln simulator. Test results showed that 50 to 70 percent reductions in stack NO /SUB x/ emissions can be readily achieved by reburning under the ''conventional'' reburning mode (conventional air staging plus fuel injection between the main burner and the staging air injection point), and close similarity between conventional reburning and air staging was observed. It was also observed that conventional reburning was superior to air staging only when the reburn zone stoichiometries were fuel-lean. For fuel-rich reburn zone stoichiometries, conventional reburning can only be as effective as air staging in reducing NO /SUB x/ emissions, but not better. It should also be noted that there are many firing arrangements that can be categorized under the heading of ''reburning,'' and the full potential of reburning in reducing NO /SUB x/ may not be realized until firing arrangements other than conventional reburning are extensively explored. One of these tested, ''biased firing,'' was capable of reducing process heater simulator stack NO /SUB x/ from unstaged baseline by greater than 90 percent which is far superior to both air staging and conventional reburning.

• Research Organization: KVB, Inc., Engineering and Research Division, Irvine, CA
• OSTI ID: 6223094
• Report Number(s): CONF-840905-
• Conference Information: Journal Name: Am. Soc. Mech. Eng., (Pap.); (United States) Journal Volume: 84-JPGC-FU-1
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
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500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AFTERBURNERS
AIR POLLUTION ABATEMENT
ANALOG SYSTEMS
BENCH-SCALE EXPERIMENTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION CONTROL
CONTROL
ENERGY SOURCES
EQUIPMENT
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLUIDS
FOSSIL FUELS
FUEL GAS
FUEL SYSTEMS
FUEL-AIR RATIO
FUELS
FUNCTIONAL MODELS
FURNACES
GAS FUELS
GASEOUS WASTES
GASES
HEATERS
INDUSTRIAL PLANTS
KILNS
NATURAL GAS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PETROLEUM REFINERIES
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
POWER RANGE 10-100 KW
REDUCTION
SIMULATORS
STAGED COMBUSTION
TESTING
THERMOCHEMICAL PROCESSES
WASTES