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METHANE de-NOX process as a NO{sub x} reduction technology for stoker boilers

Conference ·
OSTI ID:549629
;  [1];  [2]; ;  [3];  [4];  [5]
  1. Inst. of Gas Technology, Chicago, IL (United States)
  2. Gas Research Inst., Chicago, IL (United States)
  3. Detroit Stoker Co., Monroe, MI (United States)
  4. Cogentrix, Inc., Charlotte, NC (United States)
  5. Cogentrix, Richmond, VA (United States)
+ Show Author Affiliations
The most common NO{sub x} control technology utilized in stokers is selective noncatalytic reduction (SNCR) systems. The natural gas industry has developed the patented METHANE de-NOX reburning process for stokers to reduce NO{sub x} emissions to the levels set by current EPA regulations without increasing the levels of other undesirable emissions. In contrast to conventional reburning, where the reburn fuel is injected above the combustion zone to create a fuel-rich reburn zone, with METHANE de-NOX, natural gas is injected directly into the combustion zone above the grate; this results in a reduction of NO{sub x} formed in the coal bed and also limits its formation through decomposition of the NO{sub x} precursors to form molecular nitrogen rather than nitrogen oxides. The METHANE de-NOX process was field tested at the Olmsted County waste-to-energy facility in Rochester, Minnesota, and at an incineration plant in Japan. Compared to baseline levels, about 60% NO{sub x} reduction and an increase in boiler efficiency were achieved. IGT, Detroit Stoker Company, and Cogentrix are presently demonstrating the METHANE de-NOX technology on a coal-fired 390 MM Btu/h stoker boiler at a 240 MW cogeneration plant in Richmond, Virginia. Baseline tests were conducted which indicated that 50 to 60% NO{sub x} can be reduced by utilization of METHANE de-NOX.
OSTI ID:
549629
Report Number(s):
CONF-960954--
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
03 NATURAL GAS
09 BIOMASS FUELS
AIR POLLUTION ABATEMENT
BOILERS
COAL
DUAL-PURPOSE POWER PLANTS
INCINERATORS
MUNICIPAL WASTES
NATURAL GAS
NITROGEN OXIDES
RESOURCE RECOVERY FACILITIES
STAGED COMBUSTION