【摘要】 为了更好地指导管网水力模型在实际中的应用,提高科学调度水平,保障管网水的水质安全,从水力停留时间、流速和水流流向等3个方面,研究了水力条件对铁释放的影响。试验结果显示,随着水力停留时间的延长,管网中的铁释放量增加;在低流速范围内,流速变化对铁释放影响不大,超出一定临界值后,流速变大则铁释放量随之变大;水流方向的改变会在短时间内对铁释放产生剧烈的影响,造成铁浓度急剧升高,产生严重的"黄水"现象。更多还原

【Abstract】 In order to give guidance for practical application of pipe network hydraulic model to improve the level of scientific schedule and ensure water quality safety,the effect of hydraulic conditions on iron release in a water distribution system was investigated in terms of hydraulic retention time( HRT),flow velocity and flow direction. The results showed that the amount of iron release in the water distribution system rose with increase in HRT. In low flow velocity range,flow velocity increase had a slight effect on iron release. However,beyond a critical value,when flow velocity became bigger,the amount of iron release was higher. The flow direction change had a great effect on iron release in a short time. As a result,"red water"emerged in the water distribution system with high iron concentration.更多还原