稻谷变温均质干燥装置工艺优化与性能试验

Process Research and Performance Verification of Variable Temperature Homogeneous Drying Device for Paddy

为研究装置干燥均匀性和稻谷干燥特性,通过多因素试验,以干燥温度、滚筒倾角、滚筒转速为影响因素,以干燥时间和干燥速率为评价指标,考察指标对稻谷干燥特性的影响,分析不同干燥工艺对稻谷爆腰率的影响。试验结果表明,影响稻谷干燥时间和干燥速率的主次因素顺序为:干燥温度、滚筒倾角、滚筒转速,最优干燥工艺为干燥温度55℃、滚筒倾角2°、滚筒转速40 r/min。验证试验通过含水率均匀度K判定,最佳干燥工艺参数为干燥温度55℃、滚筒倾角2°、滚筒转速60 r/min。在此条件下,稻谷干燥时间为191 min,干燥速率为0.036%/min,稻谷含水率均匀度为99.6%,稻谷干燥效果最优。研究结果可以为稻谷变温均质干燥装置研制和工艺制定提供参考。

In order to verify the drying uniformity of the device and study the drying characteristics of paddy,through the multi-factor and multi-level test,taking drying temperature,drum inclination angle,drum speed as the influencing factors,and drying time and drying rate as the evaluation indexes,the influence of the indexes on the drying characteristics of paddy was investigated,and the influence of different drying processes on the paddy crackle ratio was analyzed.The test results showed that the order of the primary and secondary factors affecting the drying time and drying rate of the paddy was as follows:drying temperature,drum inclination angle,and drum speed.The optimal drying process for the drying temperature was 55℃,drum inclination angle was 2°,and drum speed was 40 r/min.Verification test through the moisture content uniformity of the K to determine the optimal drying process parameters for the drying temperature of 55℃,drum inclination angle of 2°,and drum speed of 60 r/min.Under these conditions,the drying time of the paddy was 191 min,the drying rate was 0.036%/min,and the uniformity of moisture content of paddy was 99.6%.The research results can provide certain reference value for the development and process formulation of paddy variable temperature homogeneous drying equipment.