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2013 IFRF British Flame Spring Meeting – May 2, 2013

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Introduction

  • Burner retrofits with combustion air control and fuel gas control in process furnaces are an economical solution to reducing NOx emissions while reducing operating costs with existing fired equipment
  • The optimal excess air level for achieving ultra-low NOx emissions while reducing fuel costs is around 8% excess combustion air through the burner

2013-IFRF-2

Internal Flue Gas Recirculation (IFGR)

  • With IFGR, Zeeco’s GLSF Free-Jet Burners can achieve NOx emissions levels of less than 50 mg/Nm3 at 8% excess air
  • The resulting flame is very transparent and difficult for human eyes to “see” at normal operating temperatures

Results

  • The use of an automated excess air control with Next Generation Ultra-Low NOx Burners can not only reduce emissions, but also reduce fuel costs
  • Burner retrofits with combustion air and fuel gas control in process furnaces are an economical solution to achieving lower NOx emissions levels and operating costs with existing fired equipment
  • The optimal excess air level for achieving low NOx emissions and less operating cost is ~8% excess air through the burner
  • The GLSF Free Jet Burner design can be used with a combustion air control system to achieve less than 50 mg/Nm3 NOx emissions with 316 C combustion air preheat and 0.68% fuel savings compared to operation at 20% excess air

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