RU2404840C2 - Filtration material - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to filtration of fluids and, mainly, gases. Filtration material comprises corrugated filter cloth. Crimps comprise bar tacks arranged at the distance from crimp crest of 0.1 to 0.9 of crimp height. The distance between said bar tacks makes 0.1 to 10 crimp heights. Said bar tacks are arranged on opposite crimps in staggered order.

EFFECT: higher efficiency of filtration.

2 dwg

Description

The invention relates to techniques for filtering liquids and gases, mainly gases.

Roll filter materials are known: woven cloths (Oleg Kashcheev "Russian market of technical textiles: Analysis, problems, trends and prospects for its development", "Textiles" 1 (1), September, 2002) and non-woven cloths (S.V.Konyukhova, G. .K. Mukhamedzhanov, TF Sutyagina "On the nomenclature of non-woven filter materials and their applications", "Textile" 1 (1), September, 2002) for filtering liquids and gases. The main disadvantage of these materials is the limited filtration area through the cross-sectional area of the filtered stream.

The closest filter media are corrugated filter materials (from woven and nonwoven webs) (“PulsPleat” pleated filter elements by VNA USA, 2002), which increase the filtration area through the cross-sectional area of the filtered stream. The main disadvantage of corrugated filter materials is the use of rigid filtering materials for their manufacture (paper, cardboard) .As a result - the appearance of high internal stresses in the corners of the corrugations, which lead to premature wear of the filter In addition, the increase in the filtration area through the cross-sectional area of the flow is limited by the two-dimensionality of the corrugations. The length of the cartridges is limited. It is difficult to clean the sharp corners of the corrugations of the filter material by reverse purging. which significantly reduces filtering efficiency.

These shortcomings are eliminated by making the filter cloth web pleated with fasteners. The location of these clips can be regular or irregular. Bindings are located at a distance from the top of the corrugation from 0.1 to 0.9 of the height of the corrugation. The distance between the stitches is from 0.1 to 10 corrugation heights. The staples are made on opposing corrugations in a checkerboard pattern. When the distance from the top of the corrugation to the fastening is less than 0.1 of the height of the corrugation, there is no effect of fixing the material. When the distance from the top of the corrugation to the fastening is greater than 0.9 of the height of the corrugation, the effect of corrugation is practically absent. When the distance between the stitches is less than 0.1 of the height of the corrugation, the stitches make up a continuous seam. When the distance between the fasteners is more than 10 corrugation heights, there is no effect of material fixing. The location of the staples on the opposing corrugations in a checkerboard pattern allows the corrugations to be compressed and unclenched.

A filter material is made, including a filter cloth made in the form of corrugations fastened with fasteners, a top view (FIG. 1), a bottom view (FIG. 2),

where a is the distance from the fastener to the top of the corrugation;

b is the height of the corrugation;

C is the distance between the tacks;

d is the width of the tack.

The fasteners are made by thermal welding of a thermoplastic filter material. They can be made in other ways (stitching, stapling, etc.). The shape of the fasteners can be varied (rectilinear, T - shaped, arched, shape of a flat geometric figure, etc.).

As a result, a filter material with a filtration area corresponding to the area of a cartridge obtained from a hard filter material (paper, cardboard) was obtained from a soft filter material. Filter bags are made from the obtained filter material. For this, standard equipment and standard technologies are used. The fabricated filter bags are fixed in a wire frame in the form of a filter bag in the usual manner. The use of corrugated filter material from a soft filter material increases the filtering characteristics of the filters, reduces operational loads and extends the life of the filters.

Claims (1)

The filter material comprising a filter cloth made of corrugated, characterized in that the corrugations include fasteners located at a distance from the top of the corrugation from 0.1 to 0.9 of the height of the corrugation, the distance between the fasteners is from 0.1 to 10 of the height of the corrugation, and the fasteners made on opposing corrugations in a checkerboard pattern.

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