Self-cleaning and filtering device and filtering method thereof

Abstract

The invention combines the advantages of cross flow filtration and dead end filtration, an intercepted material is concentrated along the flowing direction of a solution, and is enriched at the top ofa filter; then the principle that a vacuum is created after the concentrated solution is emptied and then a flexible filtering material (cloth bag) is shrunk and pressed flat is combined, and the sludge in the filter is compacted and falls off under the effect of gravity. Therefore, the filter is efficiently self-cleaned.

Description

technical field [0001] The invention relates to a filtering device and a filtering method, in particular to a filtering device and a filtering method with a self-cleaning function, and belongs to the technical field of solid-liquid separation and filtering. Background technique [0002] Filtration is the most commonly used operating method for separating solutions from particulate matter. As the mixture of solution and particles passes through the filter, the particles remain on the filter and the solution passes through the filter into a receiving container. According to whether the liquid inlet and the filter layer are vertical, the filter can be divided into dead-end filtration and cross-flow filtration. [0003] The dead-end filter is to place the raw water upstream of the membrane. Under the push of the pressure difference, the water and the particles smaller than the membrane pores pass through the membrane, and the particles larger than the membrane pores are retaine...

AI Technical Summary

Problems solved by technology

But precisely because the flow direction of the feed liquid is parallel to the filter membrane, its filtration efficiency is low, and the solution passing through the filter is essentially a pollutant concentration process

However, the cross-flow filtration device in the prior art still has problems such as difficult regeneration and incomplete regeneration.

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