Filter cloth convenient to clean

Abstract

The invention discloses a filter cloth convenient to clean. The filter cloth comprises a supporting net and a filtering layer connected to the flushing side of the supporting net; the filtering layercomprises a plurality of wool filaments, wherein one end of each wool filament is connected to the supporting net; a stage of a plurality of scattered single filaments is formed at the free ends of the plurality of wool filaments; under the flushing action of a filtering water flow, free ends of the plurality of wool filaments are bent towards the supporting net and are overlapped with each other;and curved flow-through filter channels with a plurality of corners are formed among the mutually overlapped wool filaments. The filter cloth has the advantages that the filter cloth is convenient toclean, so that the filter cloth can be repeatedly used, the replacement period is prolonged, and cost is saved.

Description

technical field [0001] The invention relates to an easy-to-clean filter cloth, which is especially suitable for gravity filter facilities with special-structure suction devices. Background technique [0002] The traditional filter cloth is a multi-layer structure with a support net and a filter layer. The filter layer is fixed on the downstream side of the support net (that is, the side where the filtered water to be filtered flows and impacts the filter cloth), and has The horizontal and vertical lines overlap up and down and form a curved through-flow channel with a plurality of corners. In these through-flow channels, solid particles to be filtered out are trapped and stick to the walls of the through-flow channels. The filter layer is often made of needle felt or random pattern non-woven fabric. The flow resistance of this filter layer is relatively large, and as the flow channel in the filter layer becomes more and more blocked, the flow resistance increases rapidly, ...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the filter structure of the filter cloth made of felt or non-woven fabric, it is difficult to quickly rinse the intercepted solid particles on it when backwashing, and because the through-flow channel in the filter layer is tortuous, The flow rate of the flushing water flow during backwashing is too slow, which also makes it more difficult to clean the filter cloth. If the flow rate of the backwashing water flow is actively increased, it may cause direct damage to the filter cloth

[0004] Therefore, the filter cloth of the filter layer made of felt or non-woven fabric cannot be washed many times, and must be replaced after a relatively short operating time

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