塑料介质过滤器的水力性能及泥沙处理特性研究

Study on Hydraulic Performance and Sediment Handling Capacity of PVC Plastic Media Filter

针对井水等高含沙水质的特点,重点研究轻型塑料介质过滤器在处理不同含沙水流时的水头损失和过滤效果。结果表明,原水含沙率相同时,过滤器局部水头损失与过滤流量平方成正比,而原水含沙率对过滤器局部水头损失也有微弱的正相关影响;当过滤器发生堵塞时,水头损失会随时间快速上升,其堵塞周期与原水含沙率和流量呈负相关关系;过滤流量和原水的含沙率是影响过滤器泥沙去除率的两个重要因素,泥沙去除率随流量增大初期明显下降,但逐步趋于稳定,而随着原水含沙率的增加,泥沙去除率呈现减少趋势。

According to the characteristics of well water with sand and water quality,the study is focused on the head loss and filtering effect of light medium filter in dealing water with different sand content. The results show that when the sand content of raw water is the same,the local head loss of filter is directly proportional to the square of filter flow,and the sand content of raw water has a weak positive correlation to the loss of local head of filter; when the filter is blocked,the head loss will rise rapidly with time,and the blocking period is negatively related to the sand content and flow rate of the original water; filtration flow rate and sand content of raw water are two important factors affecting filter sediment removal rate; sediment removal rate decreases obviously at the initial stage with the increase of flow rate,but tends to be stable gradually. However,with the increase of sand content in raw water,sediment removal rate decreases.