Abstract: Grain drying is an important link in the postharvest grain production and is related to the issue of national food security. The farinfrared drying machine works at high speed with low energy consumption and effectively maintains the grain quality after drying. It gradually replaces the traditional hotair drying machine, becoming the new favorite of the market. This paper reviews the domestic and foreign researches of farinfrared drying technique in recent years and the current situation of the major market of the farinfrared drying machine. It also expounds the principle of the drying technique, the influence of process parameters and the advantages and disadvantages of combined drying technology. The existing problems of the machine includes firstly the hightemperature heat source with inadequate irradiation timespan, excessive instantaneous intensity, and incapability of drying heatsensitive materials, and secondly the technique of single method that leads to unsatisfied drying effect. The development direction has been put forward that the farinfrared drying equipment will lead to the machine equipped with combined drying technology and clean energy. In the end, it introduces a farinfrared drying machine that uses graphene infrared radiant panel as its new heat source, which provides ideas for developing new materials and new heat sources, and will hopefully help further researches of the farinfrared grain drying machine.

Key words: drying equipment, infrared drying, process parameters, combined infrared drying, drying model, graphene

摘要： 粮食干燥是粮食产后的重要环节，关系国家粮食安全问题。远红外烘干设备烘干速率快、耗能低且能有效保障粮食干燥品质，正慢慢取代传统热风烘干机械，成为市场的新宠儿。综述近15年来国内外远红外干燥技术研究现状，并从原理出发阐述干燥机理、工艺参数影响及联合干燥技术优缺点。归纳可知，当前远红外烘干设备多采用高温热源，存在粮食辐照时间短、瞬时强度大的问题，难以满足热敏性物料的烘干需求，同时单一远红外干燥技术烘干效果不理想。分析指出联合干燥技术及清洁能源将会是远红外烘干设备的发展趋势，最后探讨了以石墨烯红外辐射板为新热源的栅栏型红外烘干设备的优点，为发展新材料新热源提供新思路，旨在对远红外粮食烘干设备的研发提供参考

关键词: 烘干设备, 红外干燥, 工艺参数, 红外联合干燥, 干燥模型, 石墨烯