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根据三通抽气和虹吸原理,在虹吸滤池上增设一套水力自动控制装置,对滤池的进水、过滤、反冲洗等一系列程序实行水力自动联锁,从而实现了滤池操作的自动化。由于水力自动控制装置都是由小直径的管道和配件组成,它具有设备简单,投资少,维护方便等许多优点,因此,近年来这种设有水力自动控制装置的虹吸滤池在我国得到了较为广泛的采用。这种滤池尽管有许多优点,但也存在不足之处,反冲洗前A—A断面和B—B断面之间的待滤水被浪费掉。图1其水量为:
According to the principle of three-way pumping and siphoning, a set of hydraulic automatic control device is added to the siphon filter to perform hydraulic automatic interlocking on a series of procedures such as water inlet, filtration and backwash of the filter tank, thereby realizing the operation of the filter tank. automation. Since hydraulic automatic control devices are composed of small-diameter pipes and fittings, it has many advantages such as simple equipment, low investment, and easy maintenance. Therefore, in recent years, such a siphon filter with a hydraulic automatic control device has been obtained in China. More widely used. Although this filter has many advantages, there are also deficiencies. The water to be filtered between the A-A section and the B-B section before backwashing is wasted. The amount of water in Figure 1 is: