Method for air-water backwashing and surface cleaning natural filter bed filter material and a cleaning control system thereof

Abstract

A washing method of an air-water backwashing surface of filter materials of a natural filtering bed and a washing control system thereof are provided by the invention. By the use of air lift generated by compressed air, piping generated by water power and separation generated by the mixture of the air and the water, the compact filter materials and a silt layer covered on the natural filtering bed are dispersed to cause the recombination of the filter materials. Meanwhile, with the running of river water, the silt with light weight and sediment are discharged out of the filtering bed, thus increasing the filtration coefficient of a permeable layer and the vertical infiltration velocity of surface water to underground. The control system comprises a seepage well of the natural filtering bed, an air distribution system which generates the air lift and a water distribution system and a control system which generate the piping. By adopting the method and the system of the invention, a water plant is moved to the underground, thus saving investment, occupying less area, having low operation cost, meeting the requirements of environmental engineering, increasing water yield and improving water quality.

Description

technical field [0001] The invention belongs to the desilting technology of a seepage well of a natural filter bed in the field of water treatment technology, and specifically relates to a method for sweeping the air-water backwash surface of a filter material of a natural filter bed and a sweeping control system thereof. Background technique [0002] Water resources are one of the essential resources for human beings. How to extract water resources that can be used by human beings from nature has been a subject that many scientific researchers have been exploring for a long time. Notification number CN1034025C, the invention patent named "Natural Filter Bed Seepage Well" is one of the effective methods of drawing water from nature. It has been 15 years since the technology of using natural riverbed reverse infiltration to draw water came out. , With the implementation of these years, these water intake projects using natural filter bed seepage wells have successively experi...

AI Technical Summary

Problems solved by technology

In the past, a variety of methods have been used to replenish water, such as: expanding the water intake area, raising the water level, transforming the filter bed, and infiltration canals. Solve the problem of fouling of natural filter beds

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