Next Generation Low NOx Boiler Burner

2011 AFRC International Combustion Symposium – September 18-21, 2011 – Houston, TX

Background: Valero Boiler Retrofits

• Retrofit existing boilers with low emission technology
  • NOx < 0.03 lb/MM Btu HHV
  • CO < 50 ppmv at 3% O₂ dry
  • UHC / Particulate / VOC < 15 ppmv at 3% O₂ dry
• Minimize installation costs
• Minimize operating costs
• Minimize maintenance costs

Free-Jet Design Advantages

• Stable flame over a wide range of conditions
• Compact design makes this burner a great choice for retrofit application
• Compact flame shape

Conclusions

• Challenging retrofit due to age of boilers
• Lack of accurate design data
• Tramp air leakage had to be addressed
• No external FGR required
• Steam into air stream ~ 0.3 – 0.4 # steam / # fuel
• Met emission guarantees for NOx (<0.03 lb/MM) Met emission guarantees for CO (<50 ppmv)

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