广州地区生活垃圾干燥特性与动力学分析
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国家重点基础研究发展计划(973计划)资助项目(2011CB201500)、广东省大气环境与污染控制重点实验室资助项目(2011A060901011)、广州市重大科技专项资助项目(2008-A1-D0011)和广东高校优秀青年创新人才培养计划资助项目(LYM09092)


Drying Characteristics and Kinetic Analysis on Municipal Solid Waste in Guangzhou
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    摘要:

    以广州地区生活垃圾为对象在干燥箱内进行了模拟焚烧炉内干燥过程的实验研究。分析了温度对生活垃圾干燥特性的影响,采用实验数据对7种薄层干燥数学模型进行非线性拟合,获得了描述实验过程的最优干燥模型。结果表明:干燥温度越高,干燥时间越短,极值干燥速率越大。温度从100℃升高到160℃,干燥时间由322min降至102min,最大干燥速率由0.009g/(g·min)升高到0.027g/(g·min);Page,Modified page和Weibull Distribution模型可较准确地描述实验过程;通过菲克扩散模型计算出实验范围内有效扩散系数从2.212×10-9m2/s变化到8.044×10-9m2/s,由阿乌尼斯方程得出生活垃圾的活化能为27.035kJ/mol。

    Abstract:

    A series of drying experiments on municipal solid waste(MSW) in Guangzhou were conducted in air dry oven,simulating the drying process in incineration. The influence of temperature on drying characteristics of MSW was analyzed. Seven different drying models were fitted to the experimental data as comparing the correlation coefficient and chi-squared value. The optimal drying models were obtained to predict experimental drying process. The results showed that drying time was shorter and the maximum drying rate was higher with the higher drying temperature. The drying time decreased from 322min to 102min and the maximum drying rate increased from 0.009g/(g·min) to 0.027g/(g·min) as the drying temperature rising from 100℃ to 160℃. The experimental drying process could be described accurately by page, Modified page and Weibull distribution models. The effective diffusivity of MSW changed from 2.212×10-9m2/s to 8.044×10-9m2/s with fick’s diffusivity model. The MSW activation energy of 27.035kJ/mol was determined through Arrhenius equation.

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陈 姝,马晓茜.广州地区生活垃圾干燥特性与动力学分析[J].农业机械学报,2014,45(4):208-213.

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  • 收稿日期:2013-08-31
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  • 在线发布日期: 2014-04-10
  • 出版日期: 2014-04-10