Filtering layer back washing method for percolating water abstraction and control system

Abstract

The invention discloses a filtering layer back washing method for percolating water abstraction and a control system. The filtering layer back washing method for percolating water abstraction is characterized in that a back washing medium is used for acting on a silted area of the filtering layer through a high frequency oscillation method, a mid-frequency oscillation method, a low frequency oscillation method and an impulse oscillation method; the back washing medium is caused to do reciprocating movement or impulse-type oscillation movement, so that the border of the silted area starts to loosen; and energy release points are generated all over the whole area, blockage is separated from an attachment and is flushed away by the back washing medium, so that a permeable channel is recovered on the whole filtering layer. The filtering layer back washing control system for percolating water abstraction comprises a central controller, an air-water work station, a sensing control device and a connecting part; and the filtering layer back washing control system for percolating water abstraction adopts remote sensing and remote control, automatically identifies and judges various parameters, automatically gives back washing parameters, and monitors parameter changes during the back washing process and adjusts parameters in real time, so that high automization and intelligentization are realized. The method and the control system are applicable to a natural filtering layer and an artificial filtering layer.

Description

technical field [0001] The invention belongs to the filter layer desilting technology related to percolation water intake in the technical field of water intake, and in particular relates to a filter layer backwashing method and control system for percolation water intake. Background technique [0002] The goal of backwashing and dredging the filter layer (filter bed) is to break the container effect formed by silting, remove the silt in the filter layer (filter bed), dredge or build new seepage channels in the entire water intake area, restore the water supply of the aquifer, and ensure The design water intake of the water intake pipeline. [0003] The basic working principle of filter layer (filter bed) backwashing and dredging is to inject the pressure medium into the filter layer (filter bed) in reverse through the water intake pipe, use the pressure of the medium to expand outward, break the container effect caused by silting, and then pass the medium The scouring forc...

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Problems solved by technology

The filter pool is built artificially, its boundary is clear, the energy release method is uniform upward, and its operation and control method is simple

[0012] 2. The difference between the treatment conditions and the treatment range: due to the impenetrability of the filter layer (filter bed) of the infiltration water intake, all conditions in the filter layer (filter bed) are inferred from the exploration conclusions, and the water intake filter layer of the infiltration (Filter bed) The internal complex structure and unevenness, etc., have high requirements for backwash control. The structural conditions of the filter pool are single and uniform, and the operation is simple during backwashing.

[0015] In addition, due to the great changes in water level and water volume between flood seasons and dry seasons, including flow rate, flow rate, pressure and other parameters, the existing backwashing systems are manually detected by the various parameters of the water intake pipe, and then according to the obtained Judging the blockage of the water intake pipe based on the data, the backwashing mode with a relatively simple operation not only has high technical requirements for the operators, but also increases the labor intensity of the staff, reduces work efficiency, introduces human errors, and affects backwashing. Effect

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