Heavy oil is generally used as fuel for float glass industry in China. The sulfur content of heavy oil and mirabilite in glass batch lead to a large amount of sulfur dioxide in flue gas and air pollution. Under the circumstance of more and more strict environmental protection requirements, it is urgent to treat the flue gas desulfurization of glass melting furnace. Domestic production lines such as SYP Guangdong Float and Shenzhen CSG Float have adopted flue gas desulfurization technology and equipment, and achieved satisfactory results.

Oxy-combustion technology is a technology with obvious energy-saving and environmental protection effects. At present, only three large-scale float glass melting furnaces in the world have adopted oxy-combustion technology, but its application in domestic float glass production lines is still blank. There is no need to change the fire and the regenerator structure in the air-assisted furnace using the oxy-fuel combustion technology. Oxy-combustion technology can greatly reduce the energy consumption and waste gas emission in the production process and improve the quality of glass. Take a 500t/d float glass melting furnace as an example, and its emission reduction effect is shown in Table 4.

Now, the attraction of glass furnace construction technology is increasing with the continuous reduction of oxygen cost and the continuous increase of energy cost. It is believed that this technology will be popularized and applied in domestic float glass production lines in the near future.