Low NOx Burner Retrofits with BMS for Process Heater Optimization

2013 IFRF British Flame Spring Meeting – May 2, 2013

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

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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