转轮除湿干燥技术研究进展

Research progress on drying of desiccant wheel dehumidification

转轮除湿干燥技术可以显著缩短产品干燥时间,实现低温快速干燥,但当前转轮除湿存在干燥能耗大,结构不合理等问题。从除湿能量循环利用、吸附材料组合、数学模型建立、再生能源利用与模式分析、系统配置优化、干燥工艺探究及试验测试和操作优化等角度简述国内外转轮除湿干燥技术研究进展。分析表明:目前转轮除湿干燥缺乏对除湿能耗综合分析与结构优化的深入研究。未来转轮除湿技术在产品干燥中应继续着力降低干燥能耗,通过建立适宜工况的干燥介质循环;探索新型再生技术;研发筛选新型复合除湿剂;完善除湿模型实现热质的高效传递与精准模拟等手段进一步降低干燥能耗,为农产品的快速节能干燥技术装备研发提供参考。

The desiccant wheel dehumidification can significantly shorten the drying time of the product and achieve rapid drying at low temperature,but the existing wheen has problems such as large drying energy consumption and unreasonable structure.This paper focuses on the research progress of dehumidification and drying technology at home and abroad from the perspectives of dehumidification energy recycling,adsorption material combination,mathematical model establishment,renewable energy utilization and pattern analysis,system configuration optimization,drying process exploration,experimental testing and operation optimization.The research shows that the current desiccant wheel dehumidification lacks in-depth research on the comprehensive analysis and structural optimization of dehumidification energy consumption.In the future,desiccant wheel dehumidification technology should continue to focus on reducing the drying energy consumption in the agriculture products drying process,such as establishing a suitable drying medium cycle,exploring new regeneration technology,developing and screening a new composite dehumidifier,and improving the dehumidification model to realize the efficient transfer of heat and mass so as to further reduce the drying energy consumption.The paper provides reference for the rapid energy-saving drying technology and equipment research and development of agricultural products test.