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Influences of drying parameters on efficiency rate of paddy rice in deep fixed-bed

机译:干燥参数对深层固定床水稻效率的影响

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In order to reduce drying energy consumption for paddy rice and enhance the production efficiency,a new concept of efficiency rate which showed thermodynamic characters was defined for paddy drying in a deep fixed-bed based on analyzing the existing indexes.A series of paddy drying experiments were conducted in a deep fixed-bed.Influencing laws of each experiment factor on the new index were investigated.Five-factor quadratics rotary orthogonal combination was adopted to establish the relationship between performance function and each factor,and the effects of each factor on the efficiency rate were investigated.An optimum range under 95% probability of efficiency rate lower than 2000 kJ/(kg·h) was obtained as follows:drying air temperature,drying air velocity,paddy thickness,original moisture content and tempering time were 56.2-57.7℃,0.89-0.96 m/s,35.3-37.0 cm,21.31%-21.86%,2.87-3.16 h,respectively.The results provide a reference for saving energy of paddy drying in the practice and the research of paddy drying process simulation.%为降低稻谷干燥能耗并提高其生产效率,在全面分析已有相关指标基础上,提出了可反映热力特性的稻谷深床干燥新指标效能比.利用深床干燥试验台进行稻谷干燥单因素试验和五因素五水平二次正交旋转组合试验,建立了试验因子与效能比间关系的回归数学模型,分析了各因素对效能比的作用规律,利用频数分析法进行干燥工艺参数优化,得到了比能耗具有95%概率低于2000 kJ/(kg·h)的参数范围:热风温度56.2~57.7℃,表现风速0.89~0.96 m/s,谷层厚度35.3~37.0 cm,初始含水率21.31~21.86%,干燥时间2.87~3.16 h.为稻谷干燥机的节能设计与操作提供参考.
机译:为了减少水稻干燥能源消耗,提高生产效率,在分析现有指标的基础上,定义了一种具有热力学特性的效率概念,用于深层固定床水稻干燥。在深层固定床中进行实验。研究了每个实验因子对新指标的影响规律。采用五因子二次旋转正交组合建立性能函数与各个因子之间的关系,以及各个因子对性能的影响。在95%的概率下,效率低于2000 kJ /(kg·h)的最佳范围为:干燥空气温度,干燥空气速度,稻谷厚度,原始水分和回火时间为56.2-结果分别为57.7℃,0.89-0.96 m / s,35.3-37.0 cm,21.31%-21.86%,2.87-3.16 h。降低稻谷干燥过程的模拟并提高其生产效率,在全面分析已有的相关指标基础上,提出了可反映热力特性的稻谷深床干燥新指标效益比。干燥试验台进行稻谷干燥单因素试验和五因素五水平二级正交旋转组合试验,建立了试验因子与效能比间关系的回归数学模型,分析了各因素对效能比的作用规律,利用频数分析法进行干燥工艺参数优化,得到的比值具有至少95%的概率低于2000 kJ /(kg·h)的参数范围:热风温度56.2〜57.7℃,表现风速0.89〜0.96 m / s,谷层厚度35.3 〜37.0 cm,初始长度率21.31〜21.86%,干燥时间2.87〜3.16 h。为稻谷干燥机的节能设计与操作提供参考。

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