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在农业工程中,低温干燥具有保留物料品质、节约能源等特点,高温干燥则有干燥速率快、干燥周期短等特点。重点阐述了农业工程中常用的低温干燥方法,包括真空低温干燥、热泵低温干燥、低温除湿干燥和微波低温真空干燥等,介绍了它们的基本工作原理,综述了低温干燥在农业工程中的应用情况,其中包括食品与果蔬、木材、中草药和谷物等方面,同时对低温干燥的发展趋势和前景进行了展望。
In agricultural engineering, low-temperature drying has the characteristics of preserving material quality and saving energy. High-temperature drying has the advantages of fast drying rate and short drying cycle. The methods of low temperature drying commonly used in agricultural engineering are emphatically described, including vacuum low temperature drying, low temperature drying by heat pump, low temperature dehumidifying drying and microwave low temperature vacuum drying. Their basic working principle is introduced, and the application of low temperature drying in agricultural engineering , Including food and fruits and vegetables, timber, Chinese herbal medicine and cereals, etc. Meanwhile, the development trend and prospect of low-temperature drying are also forecasted.