多孔介质物料热风干燥研究进展

Research Advances of Hot Air Drying of Porous Materials

多孔介质物料的热风干燥是许多工农业生产部门的重要生产工序,其干燥效能直接影响产品质量。多年来,国内外研究人员在多孔介质物料热风干燥领域进行了大量的研究工作,发展了多孔介质孔道网络模型,分析了分形多孔介质传热传质规律,建立了众多针对具体干燥对象的干燥模型,研制了多种多孔介质湿含量在线检测装置等。为此,从理论分析、数值模拟和实验研究3个层面综述了以上多孔介质物料热风干燥的研究进展,并对其发展趋势进行了展望。

Hot air drying process of porous materials is very important in many industrial and agricultural production departments.The drying efficiency can directly impact the quality of the final products.Over the years,researchers in and abroad have done a lot of studies in the field of hot air drying of porous media.They built many pore network models of porous media,analyzed heat and mass transfer rules in fractal porous media,established lots of drying models for specific materials,and developed a variety of on-line detecting devices for moisture content.In this paper,research advances of hot air drying of porous media at different levels of theoretical analysis,numerical simulation and experimental study are presented,and the development prospects are made as well.