真空干燥过程中水蒸发速率的影响因素分析与研究

Investigation and analysis of the factors on evaporation rate under vacuum drying process

目的:研究真空干燥过程的规律,为真空干燥工艺研究及设备的研制提供基础性技术支持。方法:在可以连续记录干燥过程中干燥样品质量和温度变化数据的实验装置上,通过基于实验数据的过程分析,得出干燥过程的主要影响参数及其主要特征。结果:在干燥过程的不同阶段,各工艺参数的影响程度是不同的。结论:为提高干燥过程的总体效率,需要根据干燥过程不同阶段的特点采取合适的工艺技术措施。

AIM： To investigate law of vacuum drying process and provide basic technical supports for drying process and design of drying machine. METHODS： A batch-drying experiment system was used to continuously record the mass and temperature of the drying sample, then the key effective factors and characteristics of different phase of drying process were obtained based on the analysis of the recorded experimental data. RESULTS ： The influence of process parameters on evaporation rate varied in different period of drying process. CONCLUSION： In order to improve the efficiency of the integrated drying process, it＇ s necessary to apply appropriate technical methods according to the characteristics of the process.