深床过滤沉积物质量与体积的换算关系  

Mass and volume conversion of deep bed filtration sediment

作　　者：张建锋[1] 金同轨[1] 王晓昌[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055

出　　处：《给水排水》2004年第4期19-22,共4页Water & Wastewater Engineering

基　　金：国家自然科学基金(59778022)

摘　　要：过滤过程滤层中沉积物的空隙率随水流平均速度梯度的改变而变化。通过受力情况和结构特性的分析,推导出了沉积物空隙率的函数表达式,在此基础上,给出沉积物质量与体积的换算关系。采用称重法和示踪剂试验的方法,通过测定沉积物的质量比截留量和体积比截留量,对给出的换算关系进行了试验验证,试验结果与理论分析相吻合。不同混凝条件的试验结果表明,随着铝盐投药比(ALT)的增加,滤层中沉积物的密度减小。In the duration of deep bed filtration the void ratio of sediment will be varied with the average flow velocity gradient. It has deduced the mathematical function of the sediment void ratio on the basis of stress and structure analysis, and then the mass and volume conversion of deep bed filtration sediment is given. This calculation has been verified by examinations of the radio of sediment mass to captured mass and sediment volume to captured mass by gravimetric and tracer methods. The results are identical to the theoretic analysis. The experiments under different coagulation conditions show that the density of the sediment in the filtering bed decreased with the increasing of aluminum salt dosage.

关 键 词：深床过滤 沉积物 密度 铝盐 滤层空隙 数学模型 

分 类 号：TU991.24[建筑科学—市政工程]