Achieving Ultra-Low NOx Emissions Without EFGR In Burner Retrofit Applications

International Flame Research Foundation – June 11-13, 2012 – Chateau de Maffliers, France

Problem

• Requirement of ultra-low NOx emissions
• Existing heater with set cutout and tube circle
• Short flame length requirement
• EFGR and SCR are not practical
• High firebox temperature

Case Study: Dow in Pittsburg, CA USA

• < 9 PPMV NOx requirement
• 6.55 MM Kcal/hr heat release
• 6.6 m firebox height
• 926 C firebox temperature
• 2.9 m tube circle
• 994,964 Kcal/m2 heat flux density
• 0.6 kg steam/kg fuel steam injection

Field Results

• Emissions measured by 3 rd party agency to be reported to Enviromental Protection Agency
• 5.94 PPMV NOx dry average
• 2.51 PPMV CO dry average

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