【摘要】 为优化盐泥颗粒干燥设备及结构参数，搭建热风干燥实验装置对盐泥颗粒进行热风干燥实验，研究不同风温、风速和堆积厚度对盐泥颗粒热风干燥特性的影响。对不同条件下的干燥特性曲线，通过比较决定系数R²、卡方x²和标准误差ESME等指标，评价5种常用干燥动力学模型对干燥曲线的拟合结果。结果表明：Midilli模型可以预测盐泥颗粒热风干燥过程水分的变化规律，模型预测的干燥曲线与实验干燥曲线有较高的拟合度。盐泥颗粒热风干燥过程中干燥速率逐渐下降，热风干燥特性与风温和堆积厚度密切相关。当温度从50℃增加到80℃时，有效水分扩散系数由2.038 39×10^-9 m²·s^-1增加到8.137 643×10^-9 m²·s^-1。更多还原

【Abstract】 In order to optimize the drying equipment and structural parameters of salt mud particles, a hot air drying device was built to conduct a hot air drying test on salt mud particles to study the effects of different hot air temperatures, hot air speeds and accumulation thicknesses on the hot air drying characteristics of salt mud particles. For the obtained drying characteristic curves under different conditions, the fitting results of the drying curves of five commonly used drying kinetic models were evaluated by comparing the coefficient of determination, chi-square, and standard error ESME. The research results showed that the Midilli model could describe the change law of moisture during the hot-air drying of salt mud particles, and the drying curve predicted by the model had a higher degree of fit with the experimental drying curve. During the hot-air drying process of salt mud particles, the drying rate gradually decreased, and the hot-air drying characteristics were closely related to the air temperature and the stacking thickness. When the temperature increased from 50 ℃ to 80 ℃, the effective water diffusion coefficient increased from 2.038 389×10^-9 m²·s^-1 to 8.137 643×10^-9 m²·s^-1。更多还原