Siphon valveless filter tank for water treatment and backwashing method

By designing a siphon valveless filter structure and a combined air-water backwashing method, the problems of incomplete backwashing and instability of existing filters were solved, achieving stable effluent quality and simple operation and maintenance. This method is suitable for water treatment scenarios of different scales and reduces initial investment and operating costs.

CN122141308APending Publication Date: 2026-06-05FUDAN UNIVERSITY
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Patent Information

Application Number
CN202610444883.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-07
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing siphon filters, gravity valveless filters, and V-type filters have problems in water treatment, such as incomplete backwashing, unstable siphon systems, and poor cost and application scenario adaptability. They are difficult to balance treatment efficiency, backwashing effect, cost and compatibility with applicable scenarios.

Method used

A siphon valveless filter structure is designed, which combines the air-water backwashing technology of V-type filter. It adopts deep bed homogeneous filter media and vertical well water distribution channel. The air-water backwashing is realized through hydraulic automatic control and program control. The water inlet structure is optimized to eliminate air entrainment, enhance the backwashing effect, and adapt to water treatment scenarios of different scales.

Benefits of technology

It achieves stable effluent quality, is easy to operate and maintain, is suitable for small and medium-sized water plants and the renovation of old water plants, reduces initial investment and operating costs, and improves the stability and backwashing effect of the siphon system.

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Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a siphon valveless filter tank for water treatment and a backwashing method. The filter tank comprises a filter tank main body, a water inlet system, a filtering system, a backwashing system, a clear water collecting system and a control valve assembly, a clear water area, an installation ultrahigh space, a sand washing tank, a filter material layer, a supporting layer, a gas-water distributor and a water distribution area are arranged in the filter tank from top to bottom, and a vertical shaft water distribution channel is arranged beside the filter tank in parallel. The water inlet system eliminates the water inlet air entrainment phenomenon through a vertical shaft water distribution channel; the backwashing of the filter tank comprises a hydraulic self-control mode and a program control mode which are both integrated with gas-water combined backwashing operation. According to the invention, the advantages of homogeneous filter material deep bed filtration and hydraulic automatic control are fused, gas-water combined backwashing is realized, and impurities in the filter layer are efficiently removed. The filter tank is compact in structure, simple and convenient to operate and maintain, suitable for water treatment scenes such as feed water treatment, sewage treatment and water quality purification, and particularly suitable for new construction of small and medium-sized water plants and transformation of old water plants, and the single-tank treatment capacity can be expanded as required.
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