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EVALUATION OF NITROGEN OXIDE EMISSIONS DATA FROM TVA COAL-FIRED BOILERS
Citation:
Stamey-Hall, S. EVALUATION OF NITROGEN OXIDE EMISSIONS DATA FROM TVA COAL-FIRED BOILERS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-92/242.
Description:
The report gives results of a study during which nitrogen oxide (NOx) emission rates from 30 boilers at 11 TVA coal-fired plants were calculated and compared with the calculated rate for each boiler type using EPA emission factors (AP-43). urrent AP-42 emission factors for NOx from utility coal-fired boilers do not account for variations in either emissions as a function of generating unit load, or designs of boilers of the same general type, particularly wall-fire boilers. VA recently compiled short-term NOx emissions data from 30 units at 11 TVA coal-fired plants. hese units include cyclone, cell-burner, single-wall, opposed-wall, single-tangential, and twin-tangential boiler firing designs. dditional recent NOx data (from non-TVA boilers) were also obtained from the literature, along with the data used to develop the current AP-42 emission factors. nalysis of these data indicates that: (1) to varying degrees, NOx emissions increase with increasing load for all but single- and opposed-wall-fired boilers; (2) using the current AP-42 quality rating scheme for each of the six boiler types, factoring in the TVA and recent literature data results in improved quality ratings for all NOx emissions and fuel nitrogen content or fuel ratio (fixed carbon to volatile matter).