全氧燃烧玻璃熔窑燃烧器安装高度的优化模拟  

Numerical Simulation of the Effect Rule of the Burners' Installation Height on Combustion Space in Oxy-fuel Glass Furnace

作　　者：谢峻林[1] 金明芳[1] 梅书霞[1] 

机构地区：[1]武汉理工大学硅酸盐材料工程教育部重点实验室,武汉430070

出　　处：《武汉理工大学学报》2011年第3期26-31,共6页Journal of Wuhan University of Technology

基　　金：国家科技支撑计划(2006BAF02A26)

摘　　要：以全氧燃烧熔窑为研究对象,借助于FLUENT软件对玻璃熔窑火焰空间进行数值模拟。对全氧燃烧条件下,燃烧器安装在3种不同高度时的熔窑火焰空间的温度场、气流场和碱蒸汽对窑炉碹顶的侵蚀情况进行分析对比,为燃烧器在全氧玻璃熔窑中的操作参数的确定提供依据,对窑炉的设计和优化进行有效的指导。研究表明,燃烧器安装高度对熔窑火焰空间温度分布有较大影响,不合适的安装位置会导致对玻璃液面的传热效率下降、碱蒸汽的挥发增强。燃烧器安装在0.3 m高度时,气流有冲刷玻璃液面的倾向,且气流平均速度较大;燃烧器安装在0.5 m高度时,火焰气流翘起,火焰空间底面附近的水蒸气的平均摩尔分数明显偏高,这些均易造成玻璃液面碱蒸气的挥发。燃烧器安装在0.4 m高度时,碱蒸汽的挥发率最小,但碹顶出现局部高温区,火焰传热效率不高。因此燃烧器的合理安装高度应该在0.3~0.4 m之间。In this paper,numerical simulation with software FLUENT was carried out in combustion space of an oxy-fuel glass furnace.On the oxy-fuel combustion conditions,when the burners installed in three different heights of the furnace,compare and analyze their temperature fields,flow fields and the erosion of the crown by alkali volatilization in combustion space,which can provide basis for operating parameters of the burners and instruct the design and optimization effectively in oxy-fuel glass furnace.Our research shows that the burners＇ installation height has a great effect on temperature fields of the combustion space and inappropriate installation height will result in decreasing of the heat transfer efficiency to glass surface and increasing of the alkali volatilization.When the burners installed at the height of 0.3 m,the gas flow tends to wash out the melted glass surface and has great average velocity;when the burners installed at the height of 0.5 m,the flame gas flow tends to go upwards and the average mole fraction of water vapor is obviously high near the bottom of the combustion space,which causes alkali vapors volatilize;when the burners installed at the height of 0.4 m,volatilization rate of alkali is the least,but high temperature zone appears in the crown and the heat transfer efficiency is not high.Therefore,the reasonable installation height of burners should be between 0.3～0.4 m.

关 键 词：玻璃熔窑 数值模拟 全氧燃烧 火焰空间 燃烧器 

分 类 号：TQ172[化学工程—水泥工业]