Stage-by-stage pollution receiving ultrafiltration filter element

Abstract

The invention provides a stage-by-stage pollution receiving ultrafiltration filter element which comprises a first filter layer and a second filter layer which are arranged from outside to inside in sequence, wherein the first filter layer is prepared from polypropylene fiber yarn; the second filter layer is prepared from polyethylene fiber yarn; the filter precision of the first filter layer is 1 to 300 [mu]m; and the filter precision of the second filter layer is 0.01 to 0.08 [mu]m. According to the stage-by-stage pollution receiving ultrafiltration filter element, by the arrangement of the polypropylene filter layer which can capture solid particles with the particle size of 1 to 300 [mu]m, high pollution receiving capacity is realized; and furthermore, by the additional arrangement of the polyethylene filter layer on the basis of the polypropylene filter layer, the filter precision of the polyethylene filter layer is 0.01 to 0.08 [mu]m, so that the polyethylene filter layer has a lower filter precision value and can achieve a better filter effect and even achieve an ultrafiltration effect. Therefore, the stage-by-stage pollution receiving ultrafiltration filter element is high in pollution receiving capacity and lower in filter precision value and can achieve the better filter effect.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a graded dirt-holding ultrafiltration filter element. Background technique [0002] The main material of the existing melt-blown gradient filter element is polypropylene, and its filter layer is composed of more than two layers of gradient filter layers with decreasing filter aperture from the outside to the inside, such as the gradient filter element disclosed in the Chinese patent literature with the announcement number CN2568276Y. The outer filter layer mainly plays the role of holding dirt, and the inner filter layer mainly plays the role of filtering with corresponding precision, which can effectively remove suspended solids, particles, colloids, rust and other substances in the liquid. However, the existing filter element is only made of polypropylene, and the melt-blown process made of polypropylene alone makes the minimum precision value of the filter layer only r...

AI Technical Summary

Problems solved by technology

However, the existing filter element is only made of polypropylene, and the melt-blown process made of polypropylene alone makes the minimum precision value of the filter layer only reach 1 μm, and the precision of 1 μm cannot be used for smaller particles such as bacteria. , Macromolecular organic matter, etc. produce interception and filtration

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