Low-turbidity precise sewage filtering system and use method thereof

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a low-turbidity precision sewage filtering system and a use method thereof. The system comprises a sewage pool for storing sewage, a dosing box used for storing a flocculating agent, a dosing mixer, a filtering assembly, a sludge tank, a clean water tank and a backwashing water pump; the dosing mixer is connected with the sewage pool and the dosing box through pipelines and is used for mixing the sewage and the flocculating agent; the filtering assembly is connected with the dosing mixer through a pipeline and used for filtering sewage, and a magnetic treatment device is arranged on the pipeline between the filtering assembly and the dosing mixer; the sludge tank is connected with the filtering assembly through a pipeline and is used for receiving sludge flushed by the filtering assembly; the clean water tank is connected with the filtering assembly through a pipeline and is used for receiving water filtered by the filtering assembly; and the backwashing water pump is connected with the clean water tank and the filtering assembly through pipelines and is used for conveying water in the clean water tank into the filtering assembly. The system solves the problems that a traditional filtering device cannot directly filter sewage with large turbidity and cannot filter filtrate with large viscosity and sewage with high algae content, the turbidity of produced water is high, the backwashing water amount is large, the occupied area is large, and continuous and stable operation cannot be achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a low-turbidity precision sewage filtering system and a use method. Background technique [0002] Natural water such as industrial wastewater, rivers and lakes, and groundwater contain more or less impurities such as suspended solids, colloids, and soluble salts, which cannot be directly used or treated in depth. Therefore, particulate suspended solids, colloids, and bacteria in the water are removed. Algae, etc. become the core part of water quality pretreatment. Existing filtration devices for water quality pretreatment all adopt the principle of physical interception, through the natural sedimentation of particles or the addition of drugs to form nets to flocculate suspended solids, colloids, and macromolecular bacteria and algae into larger particles for sedimentation and filtration. These impurities adhere to the filter material and the surface of the filter materi...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a low-turbidity precision sewage filtration system and its use method. The filtration system integrates dosing, sedimentation, filtration and backwashing, and has a wide range of applications. Directly filter polluted or turbid sewage, unable to filter viscous filtrate and high-algae sewage, high turbidity of produced water, large amount of backwash water, large floor area, and continuous and stable operation, etc.

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