硅铝酸盐微波干燥装置的仿真设计

Simulation and Design of Aluminosilicate Microwave Dehydration Device

为解决传统方法对硅铝酸盐干燥再生过程中存在的效率低、能耗高、速度慢等问题,提出了一种硅铝酸盐微波干燥装置设计方案。测量了硅铝酸盐在不同含水率下的介电特性,利用多物理场仿真软件COMSOL对影响微波干燥效果的因素进行了仿真分析,设计了四馈口基础模块并对干燥腔尺寸、馈口过渡段等关键结构参数进行了优化。仿真表明,装置在40分钟加热过程中微波反射系数保持在-10d B以下,具有良好的干燥加热均匀性,能够实现对10%含水率硅铝酸盐均匀彻底的干燥。

The objective of this work is to solve the problems such as low efficiency, high power consumption, slow processing in the conventional method of aluminosilicate dehydration and regeneration. A aluminosilicate dehydration device using microwave heating was designed. The dielectric constant of aluminosilicate was measured in different water content. The influence of several factors in the microwave dehydration was analyzed by multiphysics simulation in COMSOL, the structure of the container and transition was optimized. The simulation shows that the microwave reflection coefficient remained below -10dB in a 40 minutes heating process together with good dehydration uniformity and 10% moisture aluminosilicate thoroughly been dried.