浮法玻璃熔体中气泡行为特征的数学模拟
发布时间：2018-09-17 19:58
【摘要】：本文在前人有关浮法玻璃熔窑数学模拟研究的基础上,开发了描述流体中气泡行为特征的数学模型,通过模型耦合得到了专门描述浮法玻璃熔体中气泡行为特征的数学模型。应用此模型,对我国首座日熔化量600吨的全氧燃烧型浮法玻璃熔窑进行了仿真模拟。重点研究了该熔窑玻璃液流场以及玻璃熔体中气体分布特点,分析了该熔窑气泡澄清困难的原因,提出了针对该熔窑的优化调整措施和具体工艺优化参数,并运用研究结果指导了该熔窑的实际工业调试,取得了良好的验证效果。 通过对该熔窑玻璃液流场以及玻璃熔体中气体分布的仿真模拟研究表明：(1)对具有卡脖冷却水包和鼓泡器的浮法玻璃熔窑而言,其玻璃液存在四个主要环流；(2)与普通浮法玻璃熔窑相比,全氧燃烧型浮法玻璃熔窑由于其温度制度较高,玻璃液环流运动速度较快,玻璃液池底热点温度也较高,因此很容易导致芒硝(澄清剂)在澄清均化前区分解过快,使热点之后玻璃液表面短时间内产生较多气泡难以消除并堆积形成“泡沫层”；(3)在熔窑澄清均化前区,玻璃液中CO2、SO3这两种气体浓度较高,将直接影响到玻璃熔体中小气泡内部气体的扩散,导致小气泡难以消除产生气泡缺陷。 通过对该熔窑气泡澄清困难原因的分析,提出针对该熔窑的优化调整措施和具体工艺参数如下：(1)鼓泡器最优调整措施及参数：鼓泡器1排,距离投料池前壁13.14m,鼓泡器数目20个,鼓泡器间距0.452m,单个鼓泡器泡数为20个/分钟,且保证鼓泡器单位气体总流量为1.50Nm3/h；(2)卡脖冷却水包最优调整措施及参数：卡脖冷却水包数目1根,距离投料池前壁33.936m,插入液面深度0.45m；(3)熔窑玻璃液热点最优参数：热点位置距玻璃液面1.15m,距投料池前壁18.38m,热点温度为1408.13℃；(4)温度制度最优分配方式：采用“双热点”熔窑温度分配制度,更有利于熔化和澄清。 通过运用数学模拟有针对性的研究全氧燃烧型浮法玻璃熔窑气泡问题,并通过数学模拟提出优化措施,指导了实际生产的调试过程,使得该熔窑气泡问题得到极大改善,从而显示出该数学模型的实用性,同时也为全氧燃烧型浮法玻璃熔窑在我国的技术推广起到了指导作用。
[Abstract]:On the basis of previous studies on the mathematical simulation of float glass furnace, a mathematical model describing the behavior characteristics of bubbles in fluid has been developed in this paper. By coupling the model, a mathematical model describing the behavior characteristics of bubbles in float glass melt has been developed. With this model, the first full-oxygen combustion float glass with a daily melting capacity of 600 tons has been built in China. The simulation of the glass furnace is carried out. The flow field of the glass melt and the gas distribution in the glass melt are mainly studied. The reasons for the difficulty in clarifying the bubble in the furnace are analyzed. The optimum adjustment measures and specific process parameters are put forward. The results are used to guide the actual industrial commissioning of the furnace and the results are obtained. Good verification results.
The simulation results of the flow field and gas distribution in the glass melt show that: (1) there are four main circulations in the glass melt of the float glass melting furnace with clamped neck cooling water tank and bubbling vessel; (2) Compared with the ordinary float glass melting furnace, the oxygen combustion float glass melting furnace has a better temperature regime. The glass liquid circulation is faster and the hot spot temperature at the bottom of the glass tank is higher. Therefore, it is easy to cause mirabilite (clarifier) to decompose too quickly in the homogenization area before making the hot spot. After the hot spot, more bubbles are formed in the short time of the glass melt, and it is difficult to eliminate and form a "foam layer". (3) CO2 in the glass melt before the homogenization of the furnace is clarified. The high concentration of SO3 and SO3 will directly affect the diffusion of gas inside small bubbles in the glass melt, which makes it difficult to eliminate bubble defects.
Based on the analysis of the reasons for the difficulty of bubble clarification in the furnace, the optimum adjustment measures and technical parameters for the furnace are put forward as follows: (1) the optimum adjustment measures and parameters of the bubbler are as follows: (1) the row of bubblers, 13.14 m from the front wall of the feeding pool, 20 bubbles, 0.452 m between bubbles, 20 bubbles per minute per single bubbler, and the guarantee is given. The total flow rate per unit gas of bubbler is 1.50Nm3/h; (2) the optimum adjusting measures and parameters of the cooling water pack for the neck of the bubbler: the number of the cooling water packs for the neck of the bubbler is 1, 33.936m away from the front wall of the feeding pool, and the depth of the liquid surface is 0.45m; (3) the optimum parameters of the hot spot of the melting glass: the hot spot is 1.15m away from the liquid surface, 18.38m away from the front wall of the feeding pool, and the hot spot temperature is (4) Optimum distribution mode of temperature system: Adopting "double hot spot" furnace temperature distribution system is more conducive to melting and clarification.
Through the application of mathematical simulation, the bubble problem of oxy-fuel float glass furnace is studied, and the optimization measures are put forward through mathematical simulation. The adjustment process of actual production is guided, and the bubble problem of the furnace is greatly improved. The practicability of the mathematical model is shown. At the same time, it is also used for oxy-fuel float glass melting. The kiln has played a guiding role in the technology popularization of our country.
【学位授予单位】：海南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ171.721
本文编号：2246933
[Abstract]:On the basis of previous studies on the mathematical simulation of float glass furnace, a mathematical model describing the behavior characteristics of bubbles in fluid has been developed in this paper. By coupling the model, a mathematical model describing the behavior characteristics of bubbles in float glass melt has been developed. With this model, the first full-oxygen combustion float glass with a daily melting capacity of 600 tons has been built in China. The simulation of the glass furnace is carried out. The flow field of the glass melt and the gas distribution in the glass melt are mainly studied. The reasons for the difficulty in clarifying the bubble in the furnace are analyzed. The optimum adjustment measures and specific process parameters are put forward. The results are used to guide the actual industrial commissioning of the furnace and the results are obtained. Good verification results.
The simulation results of the flow field and gas distribution in the glass melt show that: (1) there are four main circulations in the glass melt of the float glass melting furnace with clamped neck cooling water tank and bubbling vessel; (2) Compared with the ordinary float glass melting furnace, the oxygen combustion float glass melting furnace has a better temperature regime. The glass liquid circulation is faster and the hot spot temperature at the bottom of the glass tank is higher. Therefore, it is easy to cause mirabilite (clarifier) to decompose too quickly in the homogenization area before making the hot spot. After the hot spot, more bubbles are formed in the short time of the glass melt, and it is difficult to eliminate and form a "foam layer". (3) CO2 in the glass melt before the homogenization of the furnace is clarified. The high concentration of SO3 and SO3 will directly affect the diffusion of gas inside small bubbles in the glass melt, which makes it difficult to eliminate bubble defects.
Based on the analysis of the reasons for the difficulty of bubble clarification in the furnace, the optimum adjustment measures and technical parameters for the furnace are put forward as follows: (1) the optimum adjustment measures and parameters of the bubbler are as follows: (1) the row of bubblers, 13.14 m from the front wall of the feeding pool, 20 bubbles, 0.452 m between bubbles, 20 bubbles per minute per single bubbler, and the guarantee is given. The total flow rate per unit gas of bubbler is 1.50Nm3/h; (2) the optimum adjusting measures and parameters of the cooling water pack for the neck of the bubbler: the number of the cooling water packs for the neck of the bubbler is 1, 33.936m away from the front wall of the feeding pool, and the depth of the liquid surface is 0.45m; (3) the optimum parameters of the hot spot of the melting glass: the hot spot is 1.15m away from the liquid surface, 18.38m away from the front wall of the feeding pool, and the hot spot temperature is (4) Optimum distribution mode of temperature system: Adopting "double hot spot" furnace temperature distribution system is more conducive to melting and clarification.
Through the application of mathematical simulation, the bubble problem of oxy-fuel float glass furnace is studied, and the optimization measures are put forward through mathematical simulation. The adjustment process of actual production is guided, and the bubble problem of the furnace is greatly improved. The practicability of the mathematical model is shown. At the same time, it is also used for oxy-fuel float glass melting. The kiln has played a guiding role in the technology popularization of our country.
【学位授予单位】：海南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ171.721
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