Novel glass liquid melting method by means of submerged combustion with stable compensation

Abstract

The invention relates to a novel glass liquid melting method by means of submerged combustion with stable compensation. The novel glass liquid melting method by means of submerged combustion with stable compensation comprises the following steps: respectively injecting gas fuel and a gas oxidizing agent into glass liquid by virtue of a gas spraying pipe (6) which is inserted into the glass liquid and can continuously obtain compensation after being corroded and worn, thus the gas fuel and the gas oxidizing agent are mixed and combusted in the glass liquid and a combustion cavity is formed, or injecting mixed gas of gas fuel and a gas oxidizing agent into the glass liquid to be combusted, thus the glass liquid is stirred by the produced high temperature gas, most heat is transferred to the glass liquid and batch mixture, and the glass liquid is quickly molten and homogenized; joining the gas spraying pipe (6) with a compensating pipe (7) by virtue of a combined joining device without cutting off an air source, and propelling the gas spraying pipe (6) into a furnace tank after the gas spraying pipe (6) is corroded and worn to a certain degree, so as to compensate the corroded and worn part and maintain position of a nozzle of the gas spraying pipe (6) in the glass liquid to be constant, thus stable combustion of a flame in the glass liquid can be guaranteed, and long service life of the gas spraying pipe (6) is also guaranteed.

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 molten glass can easily cause defire or tempering; and the most critical problem is: due to the limitation of materials, the burner (especially the burner) is easy to wear and tear, and its life is short, and it can neither be compensated nor difficult. replace

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

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