SU762936A1 - Filtering material for filter bags - Google Patents

Description

The invention relates to the technique of dust collection and can be used in industries that require fine cleaning of gases from dust. five

Filtering sleeves are known in which a large filtering surface per unit volume of the installation is achieved by making the sleeve of various shapes with a developed surface or by special packing of the filtering material using scaffolds.

In a known bag filter, the sleeve consists of an inner and outer 15 wire, carcasses and a filter element sandwiched between them. Frames extending along the entire length of the sleeve are mounted on the lower surface of the gas distribution grid, k · 20

the openings of which are adjacent the open ends of the sleeves. The inner frame has radial wire elements protruding outward and placed evenly around the circumference of the frame. The same 25 projections, but directed inward, also have an external framework. Thus, the cross section of the filter element is stretched between the edges of the frames [1] and [2]. thirty

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However, the known sleeve is difficult to manufacture and more expensive due to the use of internal and external frames. The use of frames also causes rapid abrasion of the filter material about them, which reduces the service life of the sleeves.

The purpose of the invention is to simplify the manufacture of the filter sleeve and the installation in the filter without reducing the surface of filtrations per unit volume of the installation, increasing the service life and ease of maintenance.

This goal is achieved by the fact that the filter material is made with threads of heat-shrinkable fibers placed at a distance from each other. It is advisable that the shrink threads are placed across, along or along and across the sleeves.

FIG. 1 shows sleeves with shrinkable fibers placed along sleeve ′ in FIG. 2 - sleeves with heat shrinkable fibers placed across the sleeve; in fig. 3 - sleeves with shrinkable fibers placed along and across the sleeves.

The filtering fabric for bag filters consists of the filtering ma-. .itera 1 and shrink yarns

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fibers 2, Thermoprocessing of the filtering material of the bag filters, shrinkage of the Fibers is carried out, which allows to obtain sleeves with corrugations that increase the filtering surface of the sleeve by 15-30% compared to the commonly used sleeves.

The offered sleeve with corrugations can be installed instead of the used cylindrical sleeves in widely used filters with regeneration by reverse blowing and mechanical shaking without any changes in design.

The simplification of the design of the filtering sleeve by eliminating the use of frames allows to reduce the cost of installation, to facilitate maintenance and increase the service life of the sleeves by eliminating their abrasion on the frames.

Claims (4)

Claim 1. The filtering material for bag filters is made of fibers, characterized in that, in order to increase the filtering surface of the material and simplify its manufacture, it is provided with threads placed at a distance from each other made of heat shrinkable fibers. 2. Filter material in π. 1, characterized in that the shrink threads are placed along the sleeve. 3. The filter material in π. 1, characterized in that the shrink threads are placed across the sleeve. 4. Filtering material on π. 1, characterized in that 15 heat shrink threads are placed along and across the sleeve.