Development of natural gas injection technology for NO sub x reduction from municipal waste combustors

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:6246452

Abbasi, H A; Khinkis, M J ^[1]; Penterson, C A; Zone, F ^[2]; Dunnette, R ^[3]; Nakazato, K ^[4]; Duggan, P A; Linz, D G ^[5]

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1. Institute of Gas Technology, Chicago, IL (United States)
2. Riley Stoker Corp., Worcester, MA (United States)
3. Olmsted County Waste-to-Energy, Rochester, MN (United States)
4. Itho Takuma Resource Systems, Inc., Osaka (Japan)
5. Gas Research Inst., Chicago, IL (United States)

Natural gas injection (NGI) technology for reducing NO{sub x} emissions from municipal waste combustors (MWCs) is being developed. The approach involves the injection of natural gas, together with recirculated flue gases (for mixing), above the grate to provide reducing combustion conditions that promote the destruction of NO{sub x} precursors, as well as NO{sub x}. Extensive development testing was subsequently carried out in a 2.5 {times} 10{sup 6} Btu/h (0.7 MWth) pilot-scale MWC firing actual MSW. Both tests, using simulated combustion products and actual MSW, showed that 50% to 70% NO{sub x} reduction could be achieved. These results were used to define the key operating parameters. A full-scale system has been designed and retrofitted to a 100-ton/day Riley/Takuma mass burn system at the Olmsted County Waste-to-Energy facility. The system was designed to provide variation in the key parameters to not only optimize the process for the Olmsted unit, but also to acquire design data for MWCs of other sizes and designs. Extensive testing was conducted to December 1990 and January 1991 to evaluate the effectiveness of NGI. This paper concentrates on the METHANE de-NO{sub x} system retrofit and testing. The results show simultaneous reductions of 60% in NO{sub x}, 50% in CO, and 40% in excess air requirement with natural gas injection. 4 refs., 5 figs., 1 tab.

• Research Organization: Institute of Gas Technology, Chicago, IL (United States)
• OSTI ID: 6246452
• Report Number(s): CONF-910481-1; ON: TI92002506
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
034000* -- Natural Gas-- Combustion
54 ENVIRONMENTAL SCIENCES
540150 -- Environment
Atmospheric-- Site Resources & Use Studies-- (1990-)
AIR POLLUTION ABATEMENT
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
ENERGY SOURCES
FIELD TESTS
FLUE GAS
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
FUNCTIONAL MODELS
GAS FUELS
GASEOUS WASTES
GASES
MUNICIPAL WASTES
NATURAL GAS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PILOT PLANTS
POLLUTION ABATEMENT
RETROFITTING
SIMULATION
STOICHIOMETRY
TESTING
THERMOCHEMICAL PROCESSES
WASTES