Mathematical Simulation Study On The Bubbles Behavior Characteristics In Float Glass Melt

This paper is based on the former research about the mathematical simulation of float glass furnace and developed mathematical model for describing bubble behavior characteristics in the fluid, through the model coupling getting mathematical model with specially describing bubble behavior characteristics in float glass melts. I do simulation research for our country’s first melt which volume of600tons per day of pure oxy-fuel float glass furnace by using this model. Research is mainly focused on the flow field of the furnace glass liquid and gas distribution characteristics in the glass melt, analyzing the difficult reason of the furnace bubbles clarification, proposing the optimization adjustment measures for the furnace and the specific process optimization parameters and using the results to guide the practical industrial adjustment of the furnace, obtaining the good effect of validation.According to the furnace glass liquid flow field simulation and gas distribution in glass melt research shows that:(1) The glass flow has four main circulation for neck cooling water pipe and bubbler float glass furnace;(2) Compared with the ordinary float glass furnace, pure oxy-fuel float glass furnace due to its high temperature system, faster velocity of glass liquid circulation, glass hot point temperature is higher, so it is easy to cause the glauber salt (refining agent) before refining end break down too fast, make the hot point liquid glass surface after a short period of time produces more bubbles is difficult to refine and accumulation form "foam layer";(3)Area before furnace refining end, CO2、 SO3gas concentration is higher in the glass melt, they will directly affect small bubbles inside gas diffusion in the glass melt, lead to small bubbles is difficult to refine the resulting bubble defects.Through the analysis of bubble to refine difficult reason about pure oxy-fuel float glass furnace, proposing the optimization of the adjustment measures and specific technical parameters are as follows:(1)Bubbler optimal adjustment measures and parameters:1row of bubbler,13.14m distance filling pocket before pool wall, bubbler number is20, bubbler spacing of0.452m, single bubbler bubbling number for20/min, and ensure the bubbler unit gas total flow of1.50Nm3/h;(2)Neck cooling water pipe optimal adjustment measures and parameters:cooling water pipe number is1root,33.936m distance filling pocket before pool wall, inserted into the liquid level depth of0.45m;(3) Glass hot point optimal parameters:location1.15m away from the glass surface,18.38m distance filling pocket before pool wall, hot point temperature is1408.13℃;(4) Furnace temperature system optimal allocation:the "double hot point" temperature distribution system is more advantageous to melt and clarification.By using mathematical simulation for the targeted research pure oxy-fuel float glass furnace bubble problem, and proposing optimization measures through using mathematical simulation, guiding the actual production of the debugging process, makes the furnace bubble problem improved significantly, which shows the practicability of this model, for pure oxy-fuel float glass furnace technology popularization has played a guiding role in our country.