康乃馨热风干燥特性研究

Research on hot-air drying characteristics of carnation

选取康乃馨为研究对象,以热风温度、风速、装载量为试验因素进行单因素试验,分析各个因素对干燥特性的影响。结果表明,3个因素对康乃馨的干燥特性影响均显著,温度越高,风速越大,装载量越少,康乃馨达到安全水分所用的时间就越短。采用3种常用的干燥模型单项扩散模型、指数模型、Page模型对试验数据进行线性回归分析和模型的拟合,得出Page模型适合描述康乃馨的干燥进程,并建立康乃馨的干燥模型。通过试验验证,Page模型的预测值与实测值的最大误差仅为6.7%,很好地描述了康乃馨的干燥进程。

Hot-air temperature,wind velocity and loading weight were taken as experimental factors to study the drying characteristics of carnation.Experimental results showed that all of the three factors significantly influence the drying characteristics of carnation.It was favorable to strengthen the drying process by increasing drying temperature and wind velocity.But the increase of loading weight could reduce drying rate.The experimental datum was simulated with different mathematical models.The results also showed that Page model was fitted to the hot-air drying curves of carnation.The change regulation of hot-air drying of carnation could be described and predicted very well by Page model according to the comparison of experimental and calculated values.