关键词：
红枣浆;微波干燥;热风干燥;干燥速率;干燥模型
摘 要：
在2 450 MHz频率功率为500、700、900 W的微波处理条件下,分别对铺料厚度为2、4、6 mm的红枣浆样品进行干燥处理,考察了红枣浆粉体化过程中的微波干燥特性.并与100、110、120℃下各相同红枣浆样品的热风干燥结果进行了比较.采用指数模型(Lewis)、单项扩散模型(Hustrulid and Flikke,HF)和Page模型分别对红枣浆样品的水分比进行拟合.结果表明,微波干燥的红枣浆样品升温快速,可有效地提高干燥速率,节约干燥时间和干燥能耗,但是热风干燥较好地保持了物料的固有结构,且干燥后的红枣粉吸湿性较好,色差较小.Page模型对于红枣浆样品的热风、微波薄层干燥过程均可以进行较好地拟合.
译 名：
Study of microwave drying characteristics of China date paste powder
单 位：
College of Food Science and Technology,Shanghai Ocean University,Shanghai 201306,China
关键词：
China date paste%microwave drying%hot-air drying%drying rate%drying model
摘 要：
The drying properties of China date paste(CDP) during its processing to powder under microwave were investigated.Microwaves of 500,700,and 900 W at 2 450 MHz were used for drying CDP samples with spreading thickness of 2,4,and 6 mm,respectively.Hot-air of 100,110 and 120 ℃ were also conducted for drying the samples for comparison.Three kinds of drying models of exponential model(Lewis),Individual diffusion model(HF: Hustrulid and Flikke) and Page model were used in the fitting of MR of the CDP samples.The results indicated the temperature of CDP dried by microwave rose faster,which could increase drying rate and save drying time and energy.But the hot air drying had a better structure and hygroscopicity and smaller color difference.Page model shows the best fitting in drying process of CDP samples during hot-air and microwave drying.
