玻璃固化熔炉不同电极连接方式熔化性能仿真研究  

Simulation Study on Melting Performance of Vitrification Melter with Different Electrode Connection Modes

作　　者：徐冬青 曲晓锐 王磊[1] 赵庆彬 李路瑶[1] 徐凯[1] XU Dongqing;QU Xiaorui;WANG Lei;ZHAO Qingbin;LI Luyao;XU Kai(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China;Innovation Center for Nuclear Facilities Decommissioning and Radioactive Waste Management Technology,Beijing 100840,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]中国核电工程有限公司,北京100840 [3]核退役治理技术创新中心,北京100840

出　　处：《硅酸盐通报》2024年第12期4608-4619,4638,共13页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(U2241290,52102030)。

摘　　要：开发可信准确的高放废液玻璃固化焦耳加热陶瓷电熔炉熔化性能预测模型是实现高放废液安全、高效玻璃固化的便捷手段。然而由于高温、高辐照的特殊工况,目前国内缺乏对高放废液玻璃固化熔炉内各物理场信息及熔化特性的直观认知。因此,本文借助GFM(Glass Furnace Model)软件,采用数值模拟技术分析了某高放废液玻璃固化熔炉在不同电极连接方式下的运行状态,获得了熔池各物理场分布信息,并研究了电极连接方式对熔炉传质、传热、玻璃液流行为的影响。结果表明,电极正对运行时玻璃液平均温度约1160℃,平均焦耳热约120 kW/m^(3),熔化效率约0.004 kg/(m^(2)·s)。相较于正常运行,电极错位运行时熔炉虽可保持熔化运行,但熔体中焦耳热分布不均,玻璃液整体流动性较差,不利于冷帽熔化和玻璃液均化,同时电极损失程度也将大幅增加。Development of a reliable and accurate predictive model for the melting performance of the Joule-heating ceramic melter(JHCM)to vitrify the high-level liquid waste(HLLW)is quite crucial to safely and efficiently treat HLLW.However,due to the harsh operating conditions of HLLW vitrification,such as high temperature and high radiation,the physical field information and melting performance of the melter are not fully understood.Therefore,this work applied the GFM(Glass Furnace Model)software and numerical simulation technique to analyze the melting performance of a JHCM for HLLW vitrification under different electrode connection modes.The influences of electrode connection modes on mass transfer,heat transfer,glass flow behavior,and the distribution of various physical fields in the melter were carefully investigated.The results indicate that during standard operation,the average temperature of the glass melt is~1160℃,the average Joule heat is~120 kW/m^(3),and the melting efficiency is~0.004 kg/(m^(2)·s).Compared to normal operation,the melter would still be able to work,when the electrodes are misaligned,but the distribution of Joule heat in the melt is uneven and the glass melt flow circulation is loose and weak,which are not beneficial for glass melting and homogenization.In this case,the risk of electrode damage will significantly increase as well.

关 键 词：高放废液 玻璃固化 焦耳加热陶瓷电熔炉 数值模拟 

分 类 号：TQ171[化学工程—玻璃工业]