Static bed filtering and purifying system and fluid filtering and purifying method

Abstract

The invention discloses a static bed filtering and purifying system and a fluid filtering and purifying method adopting the system. The static bed filtering and purifying system comprises multiple parallel-connection static bed filters, each static bed filter comprises a tank and a filtering bed, a guide-in pipe and a sewage drainage pipe which are used for introducing fluid into each tank are arranged at the upper portion of the tank, and a purified water outlet pipe is arranged at the lower portion of each tank; the static bed filters further comprise air purging units which introduce gas into the tanks to make a filter material fluidized, water inlet pipelines, sewage drainage pipelines, water outlet pipelines and gas supply units, the water inlet pipelines, the sewage drainage pipelines and the water outlet pipelines are communicated with the guide-in pipes, the sewage drainage pipes and the purified water outlet pipes of all the static bed filters respectively, and switch valves are arranged on all the guide-in pipes and the sewage drainage pipes. By means of the static bed filtering and purifying system, purified outlet water in the system serves as backwashing water, when asingle filter is backwashed, outlet water of the other filters serves as backwashing water, the backwashing flow is multiple times of the feeding flow, a backwashing pump is not needed, the cleaning efficiency is high, and the system is easy and reliable to operate.

Description

technical field [0001] The invention relates to a filtration and purification system and method for removing fluid such as suspended matter in water, in particular to a fixed-bed filtration and purification system capable of performing backwash regeneration and a method for using the system to remove suspended matter in fluid. Background technique [0002] In the field of solid-liquid separation technology, filtration is one of the main means to remove suspended solids in water. Due to its good removal effect and high treatment depth, it is widely used in industrial and urban sewage treatment. [0003] Fixed bed filters generally use granular filter media such as quartz sand and diatomaceous earth as the filter bed, and use the tiny pores inside the filter bed to intercept particulate pollutants in water. The fixed bed filter mainly relies on the filter material from the surface of the filter bed to 300-400mm below the surface to intercept suspended solids. The filter materi...

AI Technical Summary

Problems solved by technology

The fixed bed filter mainly relies on the filter material from the surface of the filter bed to 300-400mm below the surface to intercept suspended solids. The filter material is not easy to be cleaned thoroughly. Eventually stops working and the filter media has to be replaced

At the same time, water washing is generally used in backwashing, which requires high-power cleaning water pumps and backwashing with large-flow water. The washing time is long, the water consumption is large, the energy consumption is high, and the filter material will be partially lost with the backwashing water.

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