TEHAMA COUNTY AIR POLLUTION CONTROL DISTRICT
Rule 4:31 Industrial, Institutional, and Commercial Boilers, Steam Generators, and Process Heaters
Oxides of Nitrogen Control Measure.
EMISSION LIMITS FOR OXIDES OF NITROGEN (AS NO2)
Gaseous only fuel firing Gaseous & Non-gaseous fuel co-firing firing Liquid or Solid fuel 0.084 lbs/MMBtu or 70 ppmv Heat input weighted average fuel limits 0.15 lbs/MMBtu or 115 ppmv
[ppm]corrected = |
20.95% - 3.00% |
*[ppm]measured |
20.95% - |
Attachment 1
Tuning Procedure(1)
and if CO emissions are low and there is no smoke, the unit is probably operating at near optimum efficiency -- at this particular firing rate. However, complete the remaining portion of this procedure to determine whether still lower oxygen levels are practical.
FUEL MEASUREMENT VALUE Gaseous CO emissions 400 ppm #1 and #2 Oils Smoke-spot number number 1 #4 Smoke-spot number number 2 #5 Smoke-spot number number 3 Other Oils Smoke-spot number number 4
1. This tuning procedure is based on a tune-up procedure developed by KVB, Inc. for EPA.
2. The smoke-spot number can be determined with the ASTM test method D-2156 or with the Bacharach methods. ASTM test method D-2156 is included as Attachment 3 to this determination. The Bacharach method is included in a tune-up kit that can be purchased from the Bacharach Company.
3. Typical minimum oxygen levels for boilers at high firing rates are:
1). For natural gas: 0.5 - 3%
2). For liquid fuels: 2 - 4%