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微波干燥姜片模型建立與去水機理分析
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國家高技術研究發(fā)展計劃(863計劃)資助項目(2011AA100802)和科研院所技術開發(fā)研究專項資金資助項目(2012EG119149)


Analysis of Microwave Drying Model and Water Removing Mechanism of Ginger Slices
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    摘要:

    研究了姜片在單位質(zhì)量微波功率0.8、1.2、1.6W/g(干基)條件下的干燥過程,擬合分析了微波流態(tài)化干燥姜片的數(shù)學模型,認為Wang—Singh模型最適合描述微波干燥姜片的降水過程。通過核磁共振(NMR)技術研究了姜片干燥過程中水分的流動特點,發(fā)現(xiàn)干燥過程中自由水很快轉變成不易流動的束縛水,整個干燥過程以干燥束縛水為主;在最后階段束縛水降低到一定程度,結合水含量增加;微波流態(tài)化干燥過程中去水不均的現(xiàn)象沒有完全消除。研究為控制微波干燥姜片的降水過程和工藝優(yōu)化提供了理論依據(jù)。

    Abstract:

    The dehydration process of ginger slices at microwave power of 0.8, 1.2, 1.6W/g (dry basis) was researched. The moisture content, drying speed and moisture ratios at different stages were calculated. Some drying mathematical models were selected, and by fitting analysis of the moisture ratios, Wang—Singh model can be used for dehydration process of ginger slices by microwave fluidized drying. Through the technology of nuclear magnetic resonance (NMR), the flow characteristics of moisture in ginger slices drying process were studied. A conclusion could be got that the free water can be converted to some uneasy flowing bound water in a short time, the whole drying process was dominated by drying bound water, and at the final stage the bound water was decreased to a certain extent and hydration water content increased, while uneven drying hadn’t been eliminated completely in microwave fluidized drying. A theoretical basis for the process control and process optimization of ginger slices microwave drying was provided.

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呂為喬,韓清華,李樹君,周海軍,趙東林,朱衛(wèi)華.微波干燥姜片模型建立與去水機理分析[J].農(nóng)業(yè)機械學報,2015,46(4):233-237. Lü Weiqiao, Han Qinghua, Li Shujun, Zhou Haijun, Zhao Donglin, Zhu Weihua. Analysis of Microwave Drying Model and Water Removing Mechanism of Ginger Slices[J]. Transactions of the Chinese Society for Agricultural Machinery,2015,46(4):233-237.

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  • 收稿日期:2014-05-13
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  • 在線發(fā)布日期: 2015-04-10
  • 出版日期: 2015-04-10
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