含水草酸铈连续热解装置的数值模拟研究

Numerical simulation on a continuous pyrolysis equipment of wet Ce_(2)(C_(2)O_(4))_(3)·10H_(2)O

含水草酸铈(Ce_(2)(C_(2)O_(4))_(3)·10H_(2) O)的干燥热解过程对CeO_(2)的性能有着直接的影响。文章以流体仿真软件Fluent 19.0为计算平台,数值模拟了新研制的Ce_(2)(C_(2)O_(4))_(3)·10H_(2)O连续热解装置,系统研究了其连续干燥及热解过程,探讨了不同加热条件对装置内温度场及物料升温过程的影响。结果表明:加热功率是保证物料能否顺利完成干燥、热解和氧化过程并达到升温要求的重要因素;电加热体的组装方式和安装位置对装置内的温度分布和物料的升温过程有一定的影响,但对最终产品的质量影响很小;加热管的最高温度>800℃,应选用耐热钢材质。

The continuous drying and pyrolysis process of wet cerium oxalate(Ce_(2)(C_(2)O_(4))_(3)·10H_(2)O)has a direct impact on the properties of CeO_(2).In this study,a new type of continuous pyrolysis equipment of wet Ce_(2)(C_(2)O_(4))_(3)·10H_(2)O has been numerically simulated using Fluent 19.0 software.The continuous drying and pyrolysis process of wet Ce_(2)(C_(2)O_(4))_(3)·10H_(2)O has been deeply studied and the effects of different heating conditions on the temperature field and the material heating process in the equipment have also been analysed.The results indicate that it is the heating power that is an indispensable factor for ensuring the successful completion of drying,pyrolysis and oxidation of the materials,and for meeting the required temperature increases.The assembly methods and installation positions of the electric heaters have a certain impact on the temperature distribution and the heating process of the materials in the equipment,but have little impact on the quality of the final products.The maximum temperature of the heating tubes are above 800℃,so it is recommended to use heat-resistant steel.