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江南,温度与颗粒大小对污泥干燥特性的影响 马学文, 翁焕新 （浙江大学 环境与生物地球化学研究所,浙江 杭州 310027） Effects of temperature and granule size
时间：2023-12-10
焦点提醒：温度与颗粒巨细对污泥干燥特征的影响 马学文, 翁焕新（浙江年夜学 情况与生物地球化学研究所,浙江 杭州 310027）Effects of temperature and granule size on sludge drying characteristics MA Hua-Wen, WENG Huan-Xin(Institute of Environment and Biogeochemistry, Zhejiang University, Hangzhou 310027, Chin
J4
2009,Vol. 43Issue (09): 1661-1667DOI: 10.3785/j.issn.1008-973X.2009. 能源与机器项目 最新目次|下期目次|过刊阅读|高级检索 
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温度与颗粒巨细对污泥干燥特征的影响 马学文, 翁焕新 （浙江年夜学 情况与生物地球化学研究所,浙江 杭州 310027） Effects of temperature and granule size on sludge drying characteristics MA Hua-Wen, WENG Huan-Xin (Institute of Environment and Biogeochemistry, Zhejiang University, Hangzhou 310027, China)
4种分歧质量品级的污泥颗粒在100～200 ℃下进行恒温干燥尝试.成果注解,污泥干燥进程包罗不不变加热阶段、恒速干燥阶段、第一降速干燥阶段、第二降速干燥阶段4个阶段.在100～120 ℃时,污泥为弱强度干燥,临界含水质量分数受温度和颗粒巨细影响不较着；在140～200℃时为高强度干燥,临界含水质量分数随温度升高或颗粒变年夜而增年夜.污泥干燥速度不但取决在温度,还取决在污泥颗粒概况单元面积上现实用在蒸发水份的热量；减小污泥颗粒不但能够增年夜比概况积,并且能够提高单元面积的干燥速度；而污泥的干燥时候与温度呈二次方关系,与污泥的概况积呈线性关系．
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把本文保举给伴侣 插手我的书架 插手援用治理器 E-mail Alert RSS 作者相干文章 马学文 翁焕新 要害词：污泥,污泥干燥,干燥特征 Abstract： Four different weight grades of sludge granules were dried at constant temperature of 100～200 ℃. Results showed that sludge drying process included four periods: preheating period, constant rate drying period, the first falling rate drying period and the second falling rate drying period. Sludge drying process was a weak intensity drying process at 100～120 ℃, and critical moisture mass fraction was constant. It was a high intensity drying process at 140～200 ℃, and critical moisture mass fraction increased with the drying temperature or granule size increasing. The drying rate was affected with drying temperature and the quantity of water evaporating heat in a unit surface area. Reduction of granule size can increase specific surface area and drying rate in a unit surface area. There were a quadratic nonlinear relationship between drying time and temperature, and a linear relationship between drying time and sludge surface area．
Key words：sewage sludgesludge dryingdrying characteristics ����APP PACS: X 705 基金帮助:浙江省严重科技帮助项目（2005C13005,2005C23051）．
通信作者:翁焕新,男,传授,博导.E-mail:gswenghx@zju.edu.cn 作者简介: 马学文（1982-）,男,山西太谷人,博士生,处置污泥干化和资本化操纵研究. 援用本文: 马学文, 翁焕新. 温度与颗粒巨细对污泥干燥特征的影响[J]. J4, 2009, 43(09): 1661-1667.MA Hua-Wen, WENG Huan-Xin. Effects of temperature and granule size on sludge drying characteristics. J4, 2009, 43(09): 1661-1667. 链接本文: http://www.journals.zju.edu.cn/eng/CN/10.3785/j.issn.1008-973X.2009.或http://www.journals.zju.edu.cn/eng/CN/Y2009/V43/I09/1661
