Methods and procedures for parametric testing of NO x emissions pursuant to an acid rain program alternative NO x emission limitation

Methods and procedures for parametric testing of NO x emissions pursuant to an acid rain program alternative NO x emission limitation. (1) The owner or operator of an acid rain affected unit subject to the requirements under s. NR 409.065 may use one or more of the following tests as a basis for the report required under s. NR 409.065 (6) (e) 7. : (a) An ultimate analysis of coal conducted according to ASTM D3176-15, incorporated by reference under s. NR 484.10 (44) . (b) A proximate analysis of coal conducted according to ASTM D3172-13(2021)e1, incorporated by reference under s. NR 484.10 (41m) . (c) A measurement of the coal mass flow rate to each individual burner using ASME Performance Test Code 4.2-1969 (1997) or ISO 9931 (1991), incorporated by reference in s. NR 484.11 (6) and (8) . (2) The owner or operator of an acid rain affected unit subject to the requirements under s. NR 409.065 may measure and record the actual NO x emission rate in accordance with the requirements under s. NR 409.065 while varying any of the following parameters when possible to determine their effects on the emissions of NO x from the affected boiler: (a) Excess air levels. (b) Settings of burners or coal and air nozzles, including tilt and yaw, or swirl. (c) For tangentially fired boilers, distribution of combustion air within the NO x emission control system. (d) Coal mass flow rates to each individual burner. (e) Coal-to-primary air ratio (based on pound per hour) for each burner, the average coal-to-primary air ratio for all burners, and the deviations of individual burners’ coal-to-primary air ratios from the average value. (f) If the boiler uses varying types of coal, the type of coal; in this case the owner or operator shall provide the results of proximate and ultimate analyses of each type of as-fired coal. (3) In performing the tests specified in sub. (1) , the owner or operator shall begin the tests using the equipment settings for which the NO x emission control system was designed to meet the NO x emission rate guaranteed by the primary NO x emission control system vendor. These results constitute the baseline controlled condition. (4) After establishing the baseline controlled condition under sub. (3) , the owner or operator may do any of the following: (a) Change excess air levels ± 5% from the baseline controlled condition to determine the effects on emissions of NO x , by providing a minimum of 3 readings. (b) For tangentially fired boilers, change the distribution of combustion air within the NO x emission control system to determine the effects on NO x emissions by providing a minimum of 3 readings, one with the minimum, one with the baseline, and one with the maximum amounts of staged combustion air. (c) Show that the combustion process within the boiler is optimized.