压差闪蒸联合干燥技术与动态优化策略研究进展

压差闪蒸联合干燥技术是一种新型、环保、节能、优质的干燥技术,近些年发展速度很快,其干制产品具有绿色天然、品质优良、营养丰富和食用方便等特点,应用前景广阔。介绍了压差闪蒸技术的国内外研究进展,对比了国内外压差闪蒸设备及技术特点的差异,分析了不同设备条件下压差闪蒸联合干燥工艺的区别。在已有研究基础上,进一步阐述了压差闪蒸联合干燥工艺中预干燥、预处理、压差闪蒸等各个环节的工艺研究进展,重点介绍了压差闪蒸环节关键技术参数对产品品质的影响研究现状及其优化策略;介绍了一种基于过程控制的新型工艺优化策略,即基于理论模型计算的动态优化,阐释了其技术特点和研究进展;结合已有的压差闪蒸水分迁移与品质规律等研究,分析并展望了动态优化在压差闪蒸联合干燥工艺优化中的应用前景,以期为压差闪蒸联合干燥工艺发展和相应的设备升级提供参考。

Research Advance of Instant Controlled Pressure Drop Combined Drying Technology and Dynamic Optimization Strategy

Instant controlled pressure drop combined drying technology, a creativity, environment-friendly, energy saving and high-quality drying method, has developed rapidly in recent years. Its dried products perform the characteristics of green and natural, good quality and rich nutrition, edible convenience, and broad application prospects. Firstly, the development research progress of instant controlled pressure drop technology at home and abroad were reviewed, and the differences of their equipment conditions and technical characteristics were compared and analyzed. The research progress of each part of the combined drying technology including pre-drying, pretreatment and instant controlled pressure drop were reviewed. The research status of the influence of key technical parameters of instant controlled pressure drop technology on product quality as well as the responding optimization strategy were emphasized. Besides, this paper described the current mainstream optimization strategy and its application in instant controlled pressure drop combined drying. A new process optimization strategy, namely dynamic optimization based on theoretical modelling was introduced. With the existed research results on water migration and quality changes during instant controlled pressure drop combined drying technology, the application prospect of dynamic optimization on combined drying process was analyzed. Furthermore, based on the characteristics and research progress of dynamic optimization, it was proposed that the dynamic optimization could be the guidance for instant controlled pressure drop combined drying process as well as the development of corresponding technology and equipment.