| 滚筒干燥过程中叶丝表面温度变化特征 |
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| 引用本文： | 赵静芬,李斌,朱文魁,于川芳,刘民昌.滚筒干燥过程中叶丝表面温度变化特征[J].烟草科技,2011(6). |
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| 作者姓名： | 赵静芬 李斌 朱文魁 于川芳 刘民昌 |
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| 作者单位： | 郑州烟草研究院烟草行业烟草工艺重点实验室,郑州高新技术产业开发区枫杨街2号,450001 |
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| 摘 要： | 为了研究滚筒干燥过程中叶丝含水率和温度的变化规律,建立了描述叶丝滚筒干燥过程中表面温度变化的动力学模型,在此基础上进一步考察了不同壁温对叶丝表面温度变化的影响,并对比分析了烤烟和白肋烟两种叶丝干燥过程中表面温度变化特征差异.结果表明:①基于热量和质量传递平衡方程得到的叶丝表面温度动力学模型,可较好反映叶丝干燥过程表面温度动态变化特征.②随着筒壁温度升高,烤烟B2F和白肋烟C3F的升温速率增大,两种叶丝所能达到的表面温度增加;相同干燥条件下,烤烟的表面温度变化较白肋烟的表面温度变化快.③表面温度随含水率的变化经历3个阶段:第1阶段,随含水率下降,表面温度升高很快;第2阶段,随含水率的降低,表面温度缓慢升高;第3阶段,表面温度随含水率的下降而迅速升高.
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| 关 键 词： | 叶丝 滚筒干燥 热质传递 动态特征 |
Change Characteristics of Cut Tobacco' s Surface Temperature During Cylinder Drying |
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| ZHAO JING-FEN,LI BIN,ZHU WEN-KUI,YU CHUAN-FANG,LIU MIN-CHANG.Change Characteristics of Cut Tobacco' s Surface Temperature During Cylinder Drying[J].Tobacco Science & Technology,2011(6). |
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| Authors: | ZHAO JING-FEN LI BIN ZHU WEN-KUI YU CHUAN-FANG LIU MIN-CHANG |
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| Affiliation: | ZHAO JING-FEN,LI BIN,ZHU WEN-KUI,YU CHUAN-FANG,and LIU MIN-CHANG Key Laboratory of Tobacco Processing Technology of CNTC,Zhengzhou Tobacco Research Institute of CNTC,Zhengzhou 450001,China |
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| Abstract: | In order to investigate the changes of moisture content and surface temperature of cut tobacco during cylinder drying,a mathematical model for describing the surface temperature change of cut tobacco was established,further,the effects of cylinder wall's temperature on the surface temperature were studied,and the difference of surface temperature change characters between flue-cured and burley tobacco was analyzed.The results showed that: 1) the kinetic model basing on the balance equations of mass and heat... |
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| Keywords: | Cut tobacco Cylinder drying Heat and mass transfer Dynamic character |
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