Oxy-fuel combustion systems are now a practical and well tested application for use in glass melting furnaces.
Glass Service has developed the technology and have supplied a number of complete oxy-fuel combustion systems to glass manufacturers.
The oxy-fuel combustion technology can be used for special glasses as well as for standard soda lime glass with several advantages:
Reduced of energy consumption
Increased glass pull
Reduction of spares required for the furnace
Reduction of carryover from the raw materials
Easy to achieve the high temperatures required for special glasses, such as borosilicate glasses, etc.
Lower capital investment compared to regenerative or recuperative furnaces as no regenerators or metal recuperators are required
Lower investment in refractory materials and lower refractory installation cost
Continuous firing (compared with regenerative furnace)
Easy control and adjustment of the temperature profile along the furnace longitudinal axis
Glass Service combustion systems can operate with several oxygen sources:
Cryogenic liquid tank
Glass Service oxygen skid can operate either at high pressure or low pressure input (VPSA and VSA) for instance, 500mbar.
The combustion system is consists of:
Gas pressure regulator and safety equipment (safety shut off valves, pressure switch, etc.)
Oxygen pressure regulator and safety equipment (safety shut off valves, pressure switch, etc.)
Gas and oxygen flow control for each burner
Compressed air burner cooling
The gas and oxygen flow control must be very accurate and Glass Service have developed a high precision flow control system using Vortex instruments to controls the oxygen and gas flows.
The system takes into consideration variations in the temperature and pressure and compensates for variations at each burner.