SU1278000A1 - Method of producing filtering cloth bag - Google Patents

Abstract

This invention relates to dust collection and can be used in all industrial sectors where bag filters are used to clean gases. It makes it possible to increase the service life, reliability and efficiency of the filter sleeves by improving their elasticity, both in the lobe and in the transverse direction. The filtering fabric sleeve is made of a single cloth with the arrangement of the warp and weft threads at an angle to the axis of the sweep and is sewn along a helix. 1 z.p, f-ly, 1 ill. (L CZ

Description

The invention relates to the manufacture of filter bags and dust collection, can be used in all industries where filter bags are used for cleaning gases, and serves the purpose of protecting the environment.

The purpose of the invention is to increase the service life, reliability and cost-effectiveness of filtering fabric sleeves.

The drawing shows a schematic (filter sleeve.

The filter sleeve consists of a stitched fabric cylinder 1 with a seam 2, made along a helix, and rings 3 stiffness

During filtration, the flowed gas from the bunker (not shown) enters the internal cavity of the sleeve a and is filtered into the inter sleeve space, while in this case it is deposited on the inner wall of the fabric cylinder 1, forming an additional filter layer.

When a sediment is collected (a layer of seeding), a sleeve is regenerated to a certain resistance by the method of reverse blowing by pumping air through the fabric in a reverse gas flow during filtration. The dust is then poured into the bunker. After a certain period of time has elapsed, a filtration period begins, at which point the cycle repeats. Stiffening rings 3 serve to prevent the sleeve from collapsing during regeneration.

The angle of inclination of the threads to the generatrix of the sleeve (the elevation angle of the helix of the seam) is determined from the expression

JTK & x 1brvp

d. arctg 5 § o I am

  etc

where K K - the coefficients of the total area of the transverse seosnoba

& „- and

1 core and duck,

Gpr chtka

ETC.

- Maximum allowable stresses of warp and weft threads,

Due to the fact that the angle of the paddy-helix line is determined from the relation that takes into account the strength characteristics of the fabric on the basis and the weft, and K is the passport values, then when the filtering and regeneration forces the filtering and regeneration effects, the threads

The bases are loaded in the same way, as a result of which the service life of the filter sleeves is significantly increased. Fabrication (the multi-arm by sewing it along a helical line from one web for long arms is the most economical and reliable, since, without excluding the advantages of diagonal

Cutting, for example, the distribution of loads on the warp and weft threads in proportion to their strength characteristics, saves material due to waste-free production

sleeves and increase its strength due to the exclusion of additional seams formed from the pieces of the sleeve sewn together

During the filtration and regeneration cycles, the forces acting on the filter fabric, due to the chosen helix angle (seam 2), over which the sleeve is sewn, are distributed among the components

its yarns (base and ducks) are proportional to the loads placed on them, which contributes to the increase in the service life of the sleeves.

In addition, the spiral arm is more elastic in both the lobe and the rip direction, which leads to its greater deformation during the backward blowing period, and, consequently, a better quality of regeneration of filter cloth.

The invention allows to increase the service life of the arm: a 1.5-2.0 times and its reliability by reducing the stitch of the seams, reducing consumption

fabrics on one sleeve due to the elimination of waste with diagonal cutting of pieces of the sleeve, to reduce the labor intensity of production, to increase the efficiency of production of the sleeve, to increase the effective filtration area by reducing the area occupied by the seams.

Claims (1)

The invention relates to the manufacture of filter bags and dust collection, can be used in all sectors of the industry where bag filters are used for cleaning gases, and serves the purpose of protecting the environment. The purpose of the invention is to increase the service life, reliability and economy of filtering fabric sleeves. The drawing shows a schematic (filtering sleeve. The filtering sleeve consists of a stitched fabric cylinder 1 with a seam 2 made along a helical line and stiffening rings 3. During filtration, the filled gas from a hopper (not shown) enters the internal cavity of the sleeve and is filtered into the interstitial space In this case, 1b of sedimentation occurs on the inner wall of the fabric cylinder 1, forming an additional filtering layer. When collecting sediment (a layer of a slush), the sleeve is regenerated to a certain resistance by the method of reverse blowing and by pumping air through the fabric in a reverse flow of gas during filtration. Dust is poured into the bunker. After a certain period of time, a period of filtration begins and the cycle repeats. Rigidity rings 3 serve to prevent the sleeve from collapsing during regeneration. the generatrix of the sleeve (the helix angle of the seam helix) is determined from the expression JTK & x K 1brvp d. arctg 5 §o Ioteg ave where K K are the coefficients of the total cross-sectional areas of the backbone and the duck, wives Since the angle of the paddy-helix line is determined from the relation that takes into account the strength characteristics of the fabric on the basis and the weft, and K is the passport value, then when the force on the friction hose is affected by the filtration and regeneration, The filaments are again loaded equally, with the result that the service life of the filter sleeves is significantly increased. Manufacturing (a multi-piece sleeve by sewing it along a helical line from one web for long sleeves is the most economical and reliable, since, not excluding the advantages of diagonal cutting, for example) load distribution on the warp and weft threads in proportion to their strength characteristics, saves material at the expense of wasteless manufacture of the sleeve and increase its strength by eliminating additional seams formed from the pieces of the sleeve stitched together with each other. During filtration cycles and due to the selected angle of inclination of the helix (seam 2), on which the sleeve is sewn, the forces acting on the filter fabric are distributed along the threads (base and weft) in proportion to the loads installed on them, which contributes to longer service life sleeves. In addition, the coiled sleeve is more elastic in both the lobe and the pop direction, which results in its greater deformation during the backwash period, B therefore, better quality regeneration of the filter fabric. The invention allows to increase the service life of the arm: a 1.5-2.0 times and its reliability by reducing the stitch of the seams, reduce the consumption of fabric per sleeve due to the elimination of waste with diagonal cutting of pieces of the sleeve, reduce the labor intensity of production, increase efficiency making the sleeve, increase the effective filtration area by reducing the area occupied by the seams. Claim 1, A method of manufacturing a filtering tissue sleeve by sewing a fabric with an arrangement of warp and weft threads at an angle to the axis of the sweep of the sleeve, characterized in that. that, in order to increase service life, reliability and: cost-effectiveness, the sleeve is made from a chain-weave fabric by helical stitching. The method according to claim 1, distinguished by the fact that the angle of inclination to the forming sleeve is chosen .duck arctg V (1 Kb- de K, and K, coefficients of the total area of the cross-sections of warp and weft threads; maximum permissible OL tension of warp and weft threads.