【摘要】 作者根据实验研究和生产实践的结果,认为粗滤料反粒度过滤在很高的反冲洗强度作用下,整个滤层能被冲洗干净;并从理论上证明了粗砂滤层在强大的水流剪力和滤料颗粒间碰撞摩擦的双重作用下,反冲洗是在高效区进行的.更多还原

【Abstract】 On the basis of experimental research and operating practice the author confirmed that the full filtrating layer of coarse reverse-distributed media will be cleaned thoroughly by high intensity backwashing. That the backwashing process of coarse filtering layer will be operating in high effective status under the dual effect of hydraulic shearing stress-and the intergranulare collision-friction is proved theoretically in this paper.更多还原