Glass industry is a high energy consumption industry, glass melting kiln is the most energy consumption of glass production line equipment, in the cost of glass fuel costs accounted for about 35% ~ 50% of our own design and most of the float glass glass furnace liquid consumption can reach 6500kJ/kg to 7500kJ/kg glass liquid, foreign large float glass enterprises only 5800kJ/kg glass liquid, we compared with the international advanced level has certain gap.
Developed countries glass furnace thermal efficiency generally in the 30% ~ 40%, China glass furnace thermal efficiency average only 25% ~ 35%. The furnace structure design and heat preservation measures are not reasonable, use quality refractory low grade is there is one of the important reasons for this gap. Secondly, the domestic float glass process backward technology, management is not perfect and so on is caused by high energy consumption, poor quality of melting, short service life of the furnace. At present in China has a float glass production line of more than 140, glass production capacity increased rapidly, market competition gradually intensified. As the main fuel of the heavy oil, the price continues to go up, the proportion of the cost of glass is more and more large. Therefore, reducing the energy consumption of glass, to reduce production costs, improve the market competitiveness of enterprises, reduce environmental pollution, ease the energy shortage and so on are of great significance.
Energy conservation of glass enterprises is a long-term task, domestic and foreign technical personnel to actively carry out research, such as optimizing the furnace structure design, oxygen rich combustion, the whole oxygen combustion electric melting, heavy oil emulsion technology, etc.. At present, many enterprises have begun to implement energy-saving measures in the production process, and the energy saving measures in the field of glass production process control are explored.
With the water, temperature and fuel consumption is well known, the state of water in the mixture is closely related to the temperature of the mixture. With the material temperature is greater than 35 DEG C, the vast majority of water in the free state in the attachment to melt the sand surface, which can adhesion more soda help strengthen melting effect. When the temperature of batch is less than 35 DEG C, with the material of water and sodium carbonate formation na2co3-10h2o are chosen to make new or Na2CO3.7H2O, and Glauber's salt formation of new compounds of crystallization water, make the sand surface loss of moisture is dry, weaken the fluxing action.
In the northern region in winter due to lower temperatures, the complex temperature is generally lower than 35 degrees Celsius, some regions and even only about 20. In order to maintain the batch wet looking, usually taken to increase with material moisture, although have a role to play, but will also bring many disadvantages, such as silo wall caking phenomenon aggravating, fuel consumption increase. Some people through the calculation, it is concluded that the water into the kiln needs to consume the amount of oil for 0.085kg oil /kg water.
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