除湿等级划分及深度除湿技术研究进展

Dehumidification Classification and Advanced Research in Deep Dehumidification Technology

由于不同领域对湿度的要求各不相同,对除湿等级的划分并没有统一的标准,因此本文对现有除湿技术进行了整理分析,介绍了舒适性空调、设备用气、工业生产等领域的除湿要求以及目前常用除湿技术的发展状况,并将除湿等级进行划分:除湿处理后露点大于-20℃为浅近除湿;露点在-65^-20℃之间为深度除湿;露点小于-65℃为极深除湿。同时介绍了深度除湿技术最新研究进展,冷冻除湿方面,直接蒸发制冷以及加压冷冻除湿可使出风露点降至-20^-10℃以下;溶液除湿方面,可通过对除湿液进行冷却或对湿空气进行压缩等方式使出风露点降至-20^-10℃甚至更低。

At present,different fields have different requirements for humidity.The industry does not have a unified standard for the division of dehumidification levels,which is likely to cause confusion and inconvenience when multiple fields are crossed.To solve the above-mentioned problems,this study analyzes the existing dehumidification technology.It introduces the dehumidification requirements of comfort air conditioning,equipment air,industrial production and other fields.The dehumidification level is uniformly divided.After dehumidification treatment,a dew point>-20℃is considered as shallow dehumidification,a dew point between-20℃and-65℃is considered as deep dehumidification,and a dew point<-65℃is considered as extremely deep dehumidification.The latest research progress in deep dehumidification technology can be summarized as follows:for freezing dehumidification,direct evaporative refrigeration and pressurized freezing dehumidification can reduce the dew point of the outlet air to less than-10℃to-20℃;for solution dehumidification,the dew point of the outlet air can reach-10℃to-20℃,or even lower,by cooling the dehumidifying liquid or compressing the humid air.