均质滤料过滤阻力的数学模型

以NaCl为示踪剂 ,测定滤层内水流电导率的变化 ,通过分析、计算可以得到滤层内絮体的体积比截留量 .不同条件下的试验结果表明 ,在过滤过程中 ,水头损失梯度的变化只与截留的絮体体积有关 ,与滤床厚度、加药量、滤速的改变几乎无关 .根据示踪剂实验结果 ,得出了滤层过滤阻力数学模型的具体表达式 ,并讨论了相关过滤阻力模型的适用性

Mathematical model of head loss in uniform media filter

Tracer experiment was conducted by conductimetrict measurements using NaCl solution flowing through a filter layer of uniform media. As a result, the volume-specific deposit in the filter layer was evaluated. Under various operation conditions, it was found that the variation of head loss gradient was only influenced by the volume-specific deposit of the filter layer, but the effects of filtration velocity, aluminum dose and filter depth were not evident. A mathematical model was thus obtained to describe the head loss in the filter layer based on the experimental data. The applicability of several mathematical models on head loss was also discussed.