| 鸡粪中低温干燥动力学特性与参数优化 |
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| 引用本文： | 李绚阳,李保明,郑炜超,魏永祥,张智.鸡粪中低温干燥动力学特性与参数优化[J].农业工程学报,2018,34(10):194-199. |
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| 作者姓名： | 李绚阳 李保明 郑炜超 魏永祥 张智 |
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| 作者单位： | 中国农业大学水利与土木工程学院;农业农村部设施农业工程重点实验室;北京市畜禽健康养殖环境工程技术研究中心 |
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| 基金项目： | 国家蛋鸡产业技术体系（CARS-40） |
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| 摘 要： | 为了研究鸡粪的中低温干燥特性,利用恒温鼓风干燥箱,以干燥温度、粪层厚度、风速为因素研究了鸡粪含水率和干燥速率随时间变化的规律,用常见的薄层干燥模型对鸡粪的干燥曲线进行了拟合分析,并用正交试验优化了鸡粪干燥工艺参数。结果表明:鸡粪的中低温干燥过程由2个降速阶段组成,第2降速阶段的干燥速率相对于第1降速阶段下降更快。干燥温度越高,粪层厚度越小,风速越大,干燥速率曲线出现拐点的时间越早,达到干燥平衡所用时间越短;Exponential模型能较好的模拟鸡粪的干燥过程;在中低温条件下,根据Fick定律得到2~6 cm粪层厚度鸡粪的有效扩散系数在2.25×10–7~2.35×10–6 m2/h间;用正交试验得到鸡粪中低温干燥时效率最高的工艺为:干燥温度55℃,粪层厚度6 cm,风速1.2 m/s,该工艺下鸡粪的干燥效率为0.47 h/g。
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| 关 键 词： | 干燥 粪 模型 中低温 Exponential模型 有效扩散系数 |
| 收稿时间： | 2017/11/14 0:00:00 |
| 修稿时间： | 2018/2/26 0:00:00 |
Middle-low temperature drying dynamic characteristics for poultry manure and its parameter optimization |
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| Li Xuanyang,Li Baoming,Zheng Weichao,Wei Yongxiang and Zhang Zhi.Middle-low temperature drying dynamic characteristics for poultry manure and its parameter optimization[J].Transactions of the Chinese Society of Agricultural Engineering,2018,34(10):194-199. |
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| Authors: | Li Xuanyang Li Baoming Zheng Weichao Wei Yongxiang and Zhang Zhi |
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| Institution: | 1. College of Water Recourses & Civil Engineering, China Agricultural University, Beijing 100083, China; 2. Key Lab of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China;,1. College of Water Recourses & Civil Engineering, China Agricultural University, Beijing 100083, China; 2. Key Lab of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China; 3. Beijing Engineering Research Center for Livestock and Poultry Healthy Environment, Beijing 100083, China,1. College of Water Recourses & Civil Engineering, China Agricultural University, Beijing 100083, China; 2. Key Lab of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China; 3. Beijing Engineering Research Center for Livestock and Poultry Healthy Environment, Beijing 100083, China,1. College of Water Recourses & Civil Engineering, China Agricultural University, Beijing 100083, China; 2. Key Lab of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China; and 1. College of Water Recourses & Civil Engineering, China Agricultural University, Beijing 100083, China; 2. Key Lab of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China; |
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| Abstract: | |
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| Keywords: | drying manures models middle-low temperature exponential model effective diffusion coefficient |
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