Novel method for melting liquid glass by submerged combustion

Abstract

The invention relates to a novel method for melting liquid glass by submerged combustion. A fluid oxidizer and a fluid fuel are respectively injected into liquid glass and are mixed and combusted in the liquid glass to form a combustion cavity, the generated high-temperature gas stirs the liquid glass, and most heat is transferred to the liquid glass and admixture, so that the glass is quickly molten.

Description

technical field [0001] Glass melting process. Background technique [0002] The melting of molten glass is the most important and core process in the glass manufacturing process. Its advantages and disadvantages play a decisive role in environmental protection, energy saving and emission reduction, and the manufacturing cost of glass. [0003] At present, the continuous melting of molten glass with fuel all adopts the method of surface heating. It has several disadvantages that are difficult to overcome: first, the thermal efficiency is low, and its heat loss accounts for about 70% to 80% of the total heat consumption, and the heat consumption per kilogram of glass liquid is above 1800 kcal; second, the melting rate is low, Generally, it is below 1.5 tons / square meter per day; the third is that the gas temperature in the combustion space of the melting pool is high and the flow rate is high, which erodes the refractory material of the kiln faster and reduces the service li...

AI Technical Summary

Problems solved by technology

It has several disadvantages that are difficult to overcome: first, the thermal efficiency is low, and its heat loss accounts for about 70% to 80% of the total heat consumption, and the heat consumption per kilogram of glass liquid is above 1800 kcal; second, the melting rate is low, Generally below 1.5 tons / square meter per day; third, the gas temperature in the combustion space of the melting pool is high and the flow rate is high, which erodes the refractory material of the kiln faster and reduces the service life of the kiln

[0007] The reason is that this method of immersion combustion has problems that are difficult to solve: first, the fluctuation of the viscosity of the glass liquid, the pressure of the gas source and the flow rate have a great influence on the pressure and spray speed of the mixed gas, making it difficult to maintain a constant temperature for a long time Combustion in the glass liquid can easily cause defire or tempering; secondly, limited by the material, the service life of the burner is very short and it is difficult to replace

Therefore, despite long-term research and experiments, it is difficult to put into practical application

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