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Oxy-fuel combustion increases furnace efficiency, reduces emissions and improves glass quality by creating a more stable process. The addition of oxygen to the fuel almost eliminates nitrogen from the oxidiser, which greatly reduces the mass flow rate of flue gas leaving the furnace. 

Fives has more than 25 years experience in applying oxy-fuel combustion technologies to glass melting furnaces of all kinds, on greenfield projects as well as major rebuilds.

Oxy-fuel combustion design

We take advantage of more flexible oxy-fuel combustion compared to air-fuel tanks to optimize the combustion space design.

We integrate a vast range of oxygen and fuel injector solutions to suit each application and furnace size. The combustion space is designed to prevent hot spots, minimize the evaporation of volatile compounds, limit batch carry-over, and maximize heat-transfer efficiency.

Heat Recovery Area

The Heat Recovery Area - H.R.A.™ - is a patented energy-saving solution that optimizes the use of flue gases for maximum thermal efficiency.

The H.R.A.™'s clever layout forces flue gases to sweep smoothly above the batch blanker, optimizing the radiative heat transfer to the batch blanket and lowering the exit temperature of the flue gases. The design also limits the energy-consuming batch gases, which are evacuated at temperatures well below those in conventional tanks. The design of the oxy-combustion tanks allows for 6-10% reduction in gas consumption.

Combustion for glass conditioning

We use 3D printing to manufacture burner nozzles for both air-gas and oxy-gas systems. This is part of AddUp, our joint venture with Michelin.

The printing process allows multiple parts with different designs to be made simultaneously which brings production costs to attractive levels. The burners are designed to provide highly controllable and efficient combustion for forehearth applications. The result is a more responsive forehearth, enabling you to achieve:

  • Increased glass throughput
  • Improved thermal homogeneity
  • Enhanced glass quality
  • Longer refractory life with volatile glasses