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浙江大学学报(工学版)
Journal of ZheJiang University (Engineering Science)  2021, Vol. 55 Issue (2): 410-418    DOI: 10.3785/j.issn.1008-973X.2021.02.022
    
Three-dimensional numerical engineering simulation of oxy-fuel high alumina glass furnace
Chu-hang YANG(),Shao-hui JIA,Ye-cheng MA,Jing-wei ZHU,Yong LIU*(),Gao-rong HAN
State Key Laboratory of Silicon Materials, College of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
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Abstract  

Ansys Fluent 19.2 was used to study the melting tank and the combustion space of oxy-fuel high alumina float glass furnace with daily output of 100 t/d. The bidirectional thermal coupling between the top of the glass flow and the bottom of the combustion space for 3D modeling were employed. The influence of inlet batch length on temperature continuity in the coupling zone was investigated, and a formula for calculating refining index based on 3D flow field was proposed. Results show that after eight iterations of thermal coupling, residuals of temperature and heat flux tended to be stable, heat flux distribution of the heat exchanging zone between glass flow and combustion space corresponded to the temperature distribution at the bottom of combustion space. The temperature field of combustion space produced asymmetric transverse convection in glass flow. The temperature curve of the preset 6.6 m batch length showed the best continuity, and this kind of exploratory calculation provides a new method for judging the length of glass batch. The refining index of thermal coupling and non-thermal coupling were 4.6425 and 4.8279, indicating that conventional non-thermal coupling calculation has overestimated the refining ability of melting tank.

Key words： thermal coupling      batch length      transverse convection      refining index      Fluent     
Received: 19 March 2020      Published: 09 March 2021
CLC:  TQ 171  
Fund:  “十三五”国家重点研发计划资助项目（2016YFB0303700）；国家自然科学基金资助项目（U1809217，51672242）；浮法玻璃新技术国家重点实验室开放课题基金资助项目
Corresponding Authors: Yong LIU     E-mail: 21926069@zju.edu.cn;liuyong.mse@zju.edu.cn
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Chu-hang YANG
Shao-hui JIA
Ye-cheng MA
Jing-wei ZHU
Yong LIU
Gao-rong HAN
Cite this article:

Chu-hang YANG,Shao-hui JIA,Ye-cheng MA,Jing-wei ZHU,Yong LIU,Gao-rong HAN. Three-dimensional numerical engineering simulation of oxy-fuel high alumina glass furnace. Journal of ZheJiang University (Engineering Science), 2021, 55(2): 410-418.

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http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2021.02.022     OR     http://www.zjujournals.com/eng/Y2021/V55/I2/410


全氧燃烧高铝玻璃熔窑三维数值工程仿真

基于Ansys Fluent 19.2软件采用玻璃液面与火焰空间底部双向热耦合方式进行三维联合建模，对日拉引量为100 t/d的全氧燃烧浮法高铝玻璃熔窑的玻璃池窑与火焰空间进行数值工程仿真，考察入口预设配合料堆长度对耦合区温度连续性的影响，提出基于3D流场的澄清因子计算公式. 结果表明：在8次热耦合迭代后，温度和热流残差趋于稳定，玻璃液与火焰空间进行热交换部分的热流分布与火焰空间底面温度分布相对应，火焰空间温度场在玻璃液产生了不对称的横向对流；预设6.6 m料堆长度的温度曲线具有最好的连续性，该试探性计算提供了判断玻璃配合料山长度的新方法；计算得到热耦合与非热耦合的澄清因子分别为4.6425、4.8279，表明常规非热耦合计算高估了池窑的澄清能力.


关键词： 热耦合,  配合料堆长度,  横向对流,  澄清因子,  Fluent 
熔窑位置 L /m W /m H /m
熔化部 23.0 7.0 1.1
卡脖 4.2 2.8 1.1
冷却部 8.8 6.5 1.1
Tab.1 Main size parameters of melting tank
喷枪位置 S /m
1# 2# 3# 4# 5# 6#
窑炉左侧喷枪 2.9 4.6 6.4 10.4 12.1 13.8
窑炉右侧喷枪 2.1 3.8 5.5 9.6 11.3 13.0
Tab.2 Position of flame guns
Fig.1 Structural models of combustion space and melting tank
Fig.2 Relationship between viscosity and temperature of high alumina glass
燃气类型 $\varphi _{\rm{B}} $/% 燃气类型 $\varphi _{\rm{B}} $/%
CH4 95.201 C5H12 0.089
C2H6 2.286 H2 1.201
C3H8 0.407 CO2 0.663
C4H10 0.153 ? ?
Tab.3 Fuel composition of combustion space
喷枪编号 qf /（N·m3·h?1） qo /（N·m3·h?1）
1# 140 287
2# 160 328
3# 170 348
4# 170 348
5# 145 298
6# 90 185
Tab.4 Fuel-oxygen composition of flame guns
Fig.3 Schematic diagram of thermal coupling interface between combustion space and melting tank
Fig.4 Iteration residuals and temperature distribution of thermal coupling simulation
Fig.5 Temperature distribution at bottom of combustion space
Fig.6 Heat flux distribution at top of melting tank
Fig.7 Simulated average furnace pressure curves along tank length direction with various batch lengths
Fig.8 Simulated main crown temperature curves along tank length direction with various batch lengths
Fig.9 Simulated temperature curves at bottom of combustion space along tank length direction with various batch lengths
Fig.10 Velocity vector distribution of flow field in flame gun plane
Fig.11 Velocity vector distribution of glass flow field in melting tank
Fig.12 Stream traces of glass flow in melting tank
Fig.13 Stream traces of glass flow of YZ plane at various position of melting tank
模拟方式 l /m h /m u /（m·s?1） κ /（m·s?1） RI
热耦合 4.1170 0.2539 1.6539×10?4 0.4735×10?4 4.6425
非热耦合 4.1170 0.2428 3.3727×10?4 0.9603×10?4 4.8279
Tab.5 Refining index of glass flow
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