锂云母焙烧隧道窑不同码窑结构数值模拟分析  

Numerical Simulation of Yard Kiln Configuration for Lithium Mica Roasting Tunnel Kiln

作　　者：陆琳 黄立宜 冯青 张祺 江浩源 LU Lin;HUANG Liyi;FENG Qing;ZHANG Qi;JIANG Haoyuan(School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,Jiangxi,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,江西景德镇333403

出　　处：《陶瓷学报》2025年第1期175-184,共10页Journal of Ceramics

基　　金：江西省重大科技研发专项(20214ABC28W003)。

摘　　要：隧道窑作为生产碳酸锂的主要热工设备之一,其在生产锂电池工艺流程中会消耗能源和产生大量污染物。如何优化隧道窑结构、降低能源消耗和减小污染物排放成为提锂行业发展的首要问题。通过数值模拟,对比分析了隧道窑中五种不同码窑结构下窑内的流场和温度场。结果表明:每车3垛、每垛8排、横向垛间距为210 mm、每个砖垛内奇数层砖间距为60.5 mm、偶数层砖间距为174 mm、横向柱间距为60 mm、纵向柱间距为30 mm的结构为最佳码窑方式;该结构在奇数层和偶数层的平均速度不均匀系数和平均速度均值分别为:0.38、0.74,2.1 m·s^(−1)、1.2 m·s^(−1),其温度标准差最大波动幅度与无量纲过冷温度分别为:69.6%、0.122℃;相比于其他四种结构,该结构在横向上的流动阻力较小,横向堆叠通道间隙较大;五种砖垛码窑结构下纵向码放的奇数层的速度不均匀系数和温度标准差均小于其相邻横向码放的偶数层,两者平均值之间相差分别为50.9%、29.3%。[Background and purpose]To pursue the"dual carbon"goal,China has been vigorously supporting the development of new energy industries,which has led to rapid growth in the market demand for lithium and its related materials.As one of the main thermal equipment for lithium carbonate production,the tunnel kiln consumes energy and generates a large amount of pollutants during the production process of lithium batteries.With increasing emphasis worldwide on environmental protection and sustainable development,both upstream and downstream enterprises in the lithium industry are seeking more energy-efficient,high-performance and environmentally friendly tunnel kiln technologies.This is not only a challenge for tunnel kiln technologies but also an opportunity to promote their innovative development.By adopting advanced energy-saving technologies and environmentally friendly materials,the energy consumption and emissions of tunnel kilns can be reduced,so that their competitiveness in the lithium industry can be enhanced.How to optimize the structure of tunnel kilns,reduce energy consumption and cut down pollutant emissions has become the primary issue in the development of the lithium extraction industry.[Methods]In this paper,the pre-tropical band of the tunnel kiln was simplified and simulated.The meshing of five kiln stacking structures was carried out by using the ICEM software.All the mesh qualities were above 0.9,meeting the calculation requirements of Fluent.Moreover,the mesh was verified for independence.In order not to affect the accuracy of the simulation calculation,an appropriate mesh quantity model was selected.Through theoretical calculations,the parameters of each boundary condition were set.The realizable k-εturbulence model and the DO radiation model were selected.The Standard Wall Function was used in the turbulence model,while the Coupled algorithm was used in the algorithm.In addition,UDF software was used to write the functions of the physical parameters of flue gas varying with temperature,whereas th

关 键 词：隧道窑 数值模拟 温度场 速度场 码窑结构 

分 类 号：TQ174.65[化学工程—陶瓷工业]