恒定条件下池塘淤泥干化特性研究  

Research on drying characteristics of the pond sludge under constant conditions

作　　者：高翔[1] 虞宗敢[1] 周荣[1] 蔡淑君[1] 

机构地区：[1]农业部渔业装备与工程重点开放实验室中国水产科学研究院渔业机械仪器研究所,上海200092

出　　处：《渔业现代化》2009年第5期36-40,共5页Fishery Modernization

基　　金：现代农业产业技术体系建设专项资金资助(NYCYTX-49);农业部渔业装备与工程重点开放实验室开放基金资助(2009049)

摘　　要：研究池塘淤泥在恒定条件下的干化特性,为相关工艺和装备的设计提供参考和依据。实验通过恒温干化时定时采样,测定池塘淤泥在恒温烘干过程中的干化曲线和干化速率曲线,对池塘淤泥在干化过程中物性的水分变化过程进行研究。结果表明:在温度为120℃恒定干化条件下,池塘淤泥的恒速干化速率为0.115g/(cm2.m in),临界含水率为1.032 g水/g干物料。恒速干化时间占全部时间的8.3%,蒸发水分占全部水分的20.32%;淤泥表面恒温状态的降速干化时间约占全部干化时间50%,蒸发水分量占到总蒸发量的65.94%;该阶段淤泥表面积的减少使整体干化速率降低,单位表面积仍然保持恒速干化速率。The study of pond sludge drying process under constant conditions provided the basis for the process design and the equipment design. Experimental studies carried out on physical properties of water change of the pond sludge in the drying process, through regular sampling and analysis methods with constant temperature in the drying time. The researchers determined and analysis of the drying curve and the drying rate curve about the pond sludge drying in the constant temperature. Experimental results showed that the constant drying rate of the pond sludge is 0.115 g/（ cm^2 min）, and the critical moisture content is 1. 032 （dry basis moisture content）. The constant speed drying time accounted for 8.3% of full-time. The evaporation of water accounted for 20.32% of all water. Drying shrinkage deceleration time accounted for 50% of full-time. The evaporation of water accounted for 65.94% of all water. Surface area reduction reduced the overall drying rate at this stage. It remained constant drying rate on the unit surface area.

关 键 词：池塘淤泥 干化曲线 临界含水率 淡水养殖 

分 类 号：S152.73[农业科学—土壤学]