摘要
以豫麦9023为研究对象,通过采用自行设计组装的热泵流化床干燥试验装置与热风薄层干燥的对比试验,研究了50℃干燥温度工况下热泵流化床与热风薄层对豫麦连续式干燥的仓储效果。基于热泵流化床间歇干燥机理,结合连续式干燥方式对豫麦品质的影响,提出了间歇式干燥试验方案。试验表明:初始含水率相同的豫麦干燥过程,热泵流化床干燥速率大于热风薄层干燥,含水率降幅较大;与连续式干燥相比,间歇数η值越大,系统能量利用及热效率越高,干燥后的豫麦品质较好,得出了以η=2/3的间歇干燥方式仓储效果最佳。研究结果可为粮仓储粮干燥设备的设计及储粮工艺改进等提供参考依据,对于提高谷物、种子等颗粒状物料的仓储效果和延长其储藏期具有重要意义。
Taking the wheat,Yumai 9023,as a research object,the effects of both drying methods,drying with heat pump and fluidized bed designed by ourselves and drying by thin layer hot- air method,were comparatively tested at 50 ℃. Based on intermittent drying mechanism of heat pump fluidized bed,combined with the effect of continuous drying method on the quality of the wheat,the intermittent drying experiment was designed. The test showed that the drying rate of the heat pump and fluidized bed was higher than that by thin layer hot- air and larger decline in water content with the same initial moisture content. Compared with continuous drying the greater the intermittent number η,the higher the system energy use and the thermal efficiency,the better quality of the dried wheat. The optimal effect by intermittent drying was when η =2/3. The results provide reference for design of drying equipment and improvement of grain storage process,which has an important significance for improving the grain,seeds and other granular material storage effect and prolong its storage period.
出处
《粮油食品科技》
2016年第3期101-103,110,共4页
Science and Technology of Cereals,Oils and Foods
关键词
热泵流化床
间歇干燥
小麦储藏
干燥速度
heat pump and fluidized bed
intermittent drying
wheat storage
drying rate
