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高濕稻谷多段逆流干燥緩蘇解析模型研究
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國家自然科學(xué)基金資助項(xiàng)目(31371871）、高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助項(xiàng)目（20114404110021）和國家星火計(jì)劃資助項(xiàng)目（2012GA780076）


Analytical Models of Multistage Counter Flow Drying and Tempering Process of Grain
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    摘要:

    為了獲得高濕稻谷逆流干燥層內(nèi)的水分分布,，實(shí)現(xiàn)干燥過程動態(tài)跟蹤和調(diào)控,，基于干燥水分?jǐn)U散模型和深層干燥質(zhì)量平衡方程，在線解析稻谷逆流干燥水分變化,，給出了稻谷多段逆流干燥,、緩蘇復(fù)雜工藝條件下，層內(nèi)含水率分布及干燥速率解析式,，驗(yàn)證了風(fēng)量谷物比為4,，溫度50℃的熱風(fēng)流過0.5m厚的逆流層后，仍具有較強(qiáng)的干燥能力,，解析結(jié)果與實(shí)測的干燥機(jī)出糧口水分偏差在±0.5%范圍內(nèi),，證實(shí)了解析模型的可靠性。

    Abstract:

    In order to analyze the moisture distribution of rough rice with high moisture content within counter flow drying layer and achieve the dynamic tracking of drying process and its control, based on the moisture diffusion model of drying process and the mass conservation equation of deep bed drying process, grain moisture variation in counter flow drying process was analyzed, and the moisture distribution in grain layer and the analytic expression of drying rate were deduced. Experiments indicate that 50℃ hot air still has drying capacity after penetrating a 0.5m thick refluxed zone when the ratio of air flux to grain mass is 4. The deviation of grain moisture from discharge hopper between mathematical explanations and experimental results was within ±0.5%, and it confirmed the reliability of the analytical model.

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李長友,方壯東.高濕稻谷多段逆流干燥緩蘇解析模型研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2014,45(5):179-184. Li Changyou, Fang Zhuangdong. Analytical Models of Multistage Counter Flow Drying and Tempering Process of Grain[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(5):179-184.

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  • 收稿日期:2013-12-18
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  • 在線發(fā)布日期: 2014-05-10
  • 出版日期: 2014-05-10
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