Experiment on thin layer drying of pelleted corn seed and its drying model

It is necessary to dry it in time because of high moisture content after corn seed is pelleted. The selection of reasonable drying technology has great effect on raising drying effecicency, reducing energy consumption and improving quality. Drying experiment of pelleted corn seed was conducted through three-factor and three-level orthogonal experimental design, its drying characteristic curve was obtained as an index curve, and the effects of various experimental factors on drying property were analyzed. Model comparisons of drying curves at different air temperatures were made. Multiple element linear regression analysis program was employed to simulate the model. It is obtained that the mathmetical model suitable for pelleted corn seed is Page model. The drying property of pelleted corn seed is quite different from that of non-pellet corn seed. The former has its own thin layer drying equation. This model can better estimate drying speed and moisture content at different drying stages, determine reasonable drying technology so that it can adjust and control the drying enrironment, and achieve higher efficiency and lower energy consumption.