干法手套箱系统内冷却装置的数值模拟  

Numerical simulation of cooling device in glove box system of pyro-chemical reprocessing

作　　者：张凯[1] 何辉[1] 王长水[1] 林如山[1] 张磊[1] 宋鹏[1] 王有群 江嘉铭 ZHANG Kai;HE Hui;WANG Chang-shui;LIN Ru-shan;ZHANG Lei;SONG Peng;WANGYou-qun;JIANG Jia-ming(China Institute of Atomic Energy,Beijing 102413,China;School of Nuclear Science and Enginearing,East China University of Technology,Nanchang 330013,Jiangxi Province,China)

机构地区：[1]中国原子能科学研究院,北京102413 [2]东华理工大学核科学与工程学院,江西南昌330013

出　　处：《化学工程》2020年第3期73-78,共6页Chemical Engineering(China)

摘　　要：干法后处理技术是在非水介质中通过电化学、挥发等手段分离提取铀和X。在干法工艺实验熔盐体系中操作时,熔盐体系的初晶温度和X熔点分别为650℃和640℃,工艺操作过程中加热温度设定为1 000℃,在整个工艺中需要冷却装置将热量散发出去,保证手套箱底板的温度控制在40℃以内。利用计算机流体力学CFD软件模拟冷却式换热器在不同流量、不同高度下的温度场分布情况,最终得到冷却式换热器的最佳高度为70 mm,内部水流量为4 m^3/h,可以满足设计输入要求,为放大规模干法手套箱系统的建设提供了重要理论依据。Pyro-chemical reprocessing technology is a method of separating and extracting uranium and X in non-aqueous media by electrochemical,volatilization and other means.At the moment of operating in the molten salt system of pyro-chemical reprocessing experiment,the primary crysta llization temperature and X melting point were 650℃and 640℃,respectively,and the heating temperature was set to 1000℃during the process of operation.In the whole process,the cooling device was needed to distribute heat to ensure that the temperature of glove box bottom plate was controlled within 40℃.Computational fluid dynamics was used to simulate the temperature distribution of cooling heat exchanger at different flow rates and heights.Finally,the optimum height of the cooling heat exchanger is 70 mm and the internal water flow is 4 m^3/h,which can meet the design input requirements and provide an important theoretical basis for the construction of large-scale pyro-chemical box system.

关 键 词：干法手套箱系统 计算机流体力学 冷却式换热器 热力学 模拟分析 

分 类 号：TQ050.2[化学工程]