离散型流道结构叠片过滤器性能试验研究

在叠片过滤器中，叠片流道的结构决定着其工作性能。为提高叠片过滤器的水力性能和过滤性能，设计了一种离散型流道新型叠片过滤器，并与直线型流道传统叠片过滤器进行对比。通过室内模型试验，研究了两种叠片过滤器的水头损失、除沙率、拦沙量、拦截泥沙粒径分布等指标。结果表明：清水条件下离散型流道新型叠片过滤器最大水头损失为2.34 m，传统叠片过滤器为3.46 m，前者比后者小32.3%~50.0%；含沙水条件下，两种叠片过滤器拦沙量与流量呈负相关关系，随着流量的增加，过滤器拦截泥沙量逐渐减少，前者平均除沙率为18.94%，后者为15.15%；离散型流道新型叠片过滤器的有效过滤周期长、水头损失峰值低，且对细粒径泥沙的拦截效果较好。综上所述，离散型流道新型叠片过滤器与直线型流道传统叠片过滤器相比，具有较好的水力性能和过滤性能。

Experimental study on performance of disc filter with discrete flow channel structure

Disc flow channel structure is an important factor affecting the performance of disc filters. To improve the hydraulic property and working performance of the disc filters, a new type of disc filter with a discrete channel structure was designed and its performance was then compared with that of the conventional linear disc filter. The head loss, sediment interception rate, sediment removal rate, sediment particle size distribution of these two types of filters were monitored via laboratory physical model test. The results showed that under the condition of clear water, the maximum head loss of the novel disc filter and conventional disc filter was 2.34 m and 3.46 m respectively, the former was 32.3%~50.0% lower than the latter. Under the condition of sandy water, the performance of sediment interception of these two types of filters were negatively correlated with the flow rater, i.e., the larger the flow rate, the less the sediment interception of the filters; the average sediment removal rate of the novel filter was 18.94%, whereas that of the conventional filter was 15.15%. Furthermore the novel disc filter performed better at fine-grained sediment interception with a longer effective filtering cycle and lower peak water-head loss. Overall, the hydraulic property and filtration performance of the discrete disc filter are better compared with the conventional linear disc filter.