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Liquid oxygen feed natural gas burners
Dr. Dan Ertl
ERTL Enterprises, Inc.

below are the authors notes from the presentation - the Chapter Webmaster did not attend this meeting, nor prepare a formal report

The Basics of Oxy-fuel Combustion

Air Fuel Combustion
Air is primarily composed of 21% O2 and 79% N2
N2 does not contribute to the generation of heat

Air Fuel Combustion
CH4 + (8 N2 2 O2) = C O2 + 2 H20 + N2
(methane) (10 air x 21%)
carbon dioxide water vapor nitrogen

Nitrogen contributes nothing to the combustion process

Nitrogen acts as a heat-sink
Enters the process at room temp
Exits the stack at process temp

How to make combustion process more efficient
Oxy-fuel combustion

Oxygen enrichment

Oxy-Fuel Enrichment
Adding oxygen to the combustion chamber to reduce the amount of air needed

Adding oxygen to the combustion air to boost the oxygen content

Oxy-Fuel Combustion
CH4 + 2 O2 = C O2 + 2 H20
(methane) (oxygen) carbon dioxide water vapor

Typical oxygen-natural gas ratio is 2:1
(Air-gas is 10:1)
Theoretical flame temp = 5100F

Advantages of Oxy-Fuel Combustion
?Higher flame temperatures
Higher efficiency
Lower NOx
Reduced flue gas volume
Why use oxy-fuel combustion?
Increase productivity
Lower NOx
Provide boost heat to an aging furnace
Lower fuel consumption

ERTL Oxy-Fuel Burners
FO2RCE Family of burners

FO2RCE Burner
Low-cost alternative to high-tech oxy-gas burners
Installations in many types of furnaces
Used as the primary source of energy or as an enhancement to existing systems

FO2RCE Burner Installation

Advantages of  FO2RCE Burners

Lower NOx emissions compared to Air-gas Burners
Decreased flame length and volume
Higher luminosity
Non-lofting, low momentum flame
Flame Sensing with Oxy-Fuel Burners
Scan through gas nozzle Scan through an optional pilot hole
Typical Oxy-Fuel Applications
Glass furnace
Oxy-fuel boosting in a glass furnace
Ladle pre-heating
Aluminum rotary furnace
Aluminum reverberatory furnace
Lead and copper smelting
Boosting in EAF furnaces

Typical Oxy-Fuel Applications
Forge furnace
Incineration
Thermal oxidizer
Ash melting
Vitrification of wastes

Oxy-Fuel Pipe Trains
Custom designed to fit any application
Oxygen trains must be specially cleaned & degreased for oxygen service
All components used must be oxygen compatible
Leak tested with supporting documentation

Oxy-Fuel Pipe Trains
Equipment manuals are must be included with each system
Technical support must be available after installation
Must be built according to stringent quality control standards

10” Oxygen 6” Gas Lines

Mini Gas-Oxygen System
Rotary Furnace