A kind of filtering system and filtering method

Abstract

The invention relates to the field of liquid treatment, in particular to a filtration system and a filtration method. The filtration system comprises a filter chamber, a process fluid tank and a backwash liquid tank, wherein a sewage discharge pipeline controlled by a control valve is arranged on a first filter pipeline for communicating the process fluid tank with a filter inlet of the filter chamber; the filter chamber is used for filtering process fluid; backwash liquid is used for backwashing the filter chamber and discharging filter residues in the filter chamber from the sewage discharge pipeline; a plurality of pipelines are arranged among the filter chamber, the process fluid tank and the backwash liquid tank; the filtration process and the backwashing process can be performed separately as a plurality of control valves are arranged on the pipelines, so as to achieve the automatic control of the filtration process and the backwashing process while reducing the production costs.

Description

Technical field [0001] The invention relates to the field of liquid treatment, in particular to a filtering system and a filtering method. Background technique [0002] Filtration is the liquid (or gas) in the suspension (or the heating gas containing solid particles) through the medium under the action of driving force or other external force, and the solid particles and other substances are intercepted by the filter medium, so that the solid and other substances and the liquid ( Or gas) separation operation. When the process fluid passes through the filter material, particles larger than the pores of the filter layer are intercepted; subsequently, the pores of the filter layer gradually become smaller and smaller particles are also intercepted, but doing so will make the filter impurities highly residual in the filter medium and difficult to clean. This leads to a high replacement rate of the filtration system and increases costs. Each pipeline of the filtration system exists...

AI Technical Summary

Problems solved by technology

When the process fluid passes through the filter material, particles larger than the pores of the filter layer are retained; then, the pores of the filter layer gradually become smaller, and smaller particles are also retained, but this will make the filter impurities highly residual in the filter medium and difficult to clean. Leads to high filter system replacement rates and increased costs

Each pipeline of the filtration system exists independently, requiring more control valve ports, and it is impossible to form a low-cost automatic control system

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