挂面干燥过程水分迁移规律研究  

Study on Water Transfer during the Drying Process of Chinese Dried Noodles

作　　者：魏益民[1] 王振华[1,2] 于晓磊[1] 武亮[1] 王杰[1] 张波[1] 张影全[1] 李明[1] 

机构地区：[1]中国农业科学院农产品加工研究所/农业部农产品加工综合重点实验室,北京100193 [2]北京工商大学北京食品营养与人类健康高精尖创新中心,北京100048

出　　处：《中国食品学报》2017年第12期1-12,共12页Journal of Chinese Institute Of Food Science and Technology

基　　金：国家自然科学基金项目(51506218);现代农业产业技术体系建设专项(CARS-02)

摘　　要：干燥是挂面生产的重要环节,然而干燥工艺优化和设备设计等还缺少相应的科学依据和标准规范。本文以食品水分分析技术平台为试验手段,设计了不同条件下的挂面干燥试验。通过测定挂面干燥过程中的干燥动力学曲线,分析干燥条件(温度和相对湿度)对含水率及干燥速率的影响;通过低场核磁共振分析系统(NMI20-030H-I)测定干燥过程中的水分横向弛豫时间(T_2)和质子密度加权像,分析挂面干燥过程中的水分状态和水分分布变化规律;通过建立挂面干燥过程中的湿热传递数学模型,观察挂面干燥过程中温度场和水分场的分布和变化规律。上述研究结果系统地展现挂面干燥过程水分的迁移规律,挂面干燥过程温度和含水率的变化,挂面干燥条件和控制参数的关系。这些结果将为干燥工艺优化和干燥过程智能控制提供理论依据和技术参考。Drying process is an important operation during the production of Chinese dried noodle（CDN）, but there is still a lack of relevant scientific basis and standards for the optimization and equipment design of drying process. In this paper, the drying experiments of CDN under different conditions were studied by using the technical platform of food moisture analysis as the research platform. The effects of drying conditions（i.e. air temperature and relative humidity） on moisture content and drying rate were studied by the drying kinetics curves during the drying process of CDN. The changes of water state and water distribution in the drying process of CDN were analyzed from the transverse relaxation time（T2） and MRI images, which were both measured by low-field nuclear magnetic resonance spectroscopy（NMI20-030 H-I）. The changes of temperature profiles and moisture profiles during the drying process of CDN were observed intuitively through establishing a heat and mass transfer mathematical model during the drying process of CDN. The research results systematically showed the moisture transfer law in the drying process of CDN, the changing of moisture profiles and temperature profiles in CDN, and the relationships between drying conditions and control parameters. These achievements provide a theoretical basis and technical reference for the optimization and intelligent control of the drying process.

关 键 词：挂面 干燥工艺 水分传递 低场核磁共振和成像 数学模型 

分 类 号：TS213.24[轻工技术与工程—粮食、油脂及植物蛋白工程]