SU1380763A1 - Arrangement for securing bag filter - Google Patents

Abstract

The invention relates to the field of gas purification by filtration, intended for use in metallurgy, in particular in ferroalloy production in bag filters with lower gas distribution and regeneration by means of reverse blowing, and improves the reliability of mounting of bag filters by eliminating cases of their failure from the top mounting and providing the possibility of periodically tightening the sleeves without dismantling them. In a device for attaching a bag filter, including a sleeve suspended to the support grid with a tension device made in the form of a spring with a loop-shaped clip placed inside it, the tension device is provided with a mirror-reflected additional clip fixed with bent ends to the bottom edge of the straps, loop - through the suspension behind the bars. 1 il. S (l

Description

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The invention relates to the purification of gas by filtration, intended for use in metallurgy, in particular in the ferroalloy and steel-making industries, in bag filters with lower gas distribution and regeneration by means of reverse purge and serves the purpose of environmental protection. The purpose of the invention is to increase the reliability of fastening of bag filters by eliminating the cases of their breaking from the upper mount and enabling periodic retention of the sleeves without dismantling them.

The drawing shows a device for fastening a bag filter in the working position.

A bag filter includes a filtering sleeve 1 of a stitched or solid-woven fabric made of woven or non-woven material. The bag filter is fixed to the plug 2 with a collar 3 and with the help of an eyebolt 4 is suspended on a loop-shaped bracket 5 located inside the spring 6 and its bent ends hooked to the upper edge of the spring. The spring 6 rests on the bracket 7, which is similar to the bracket 5 and is of the same size but mirrored to the bracket 5. The bracket 7 is suspended by its loop to the flexible suspension, which is shown in the drawing as chain 8. The chain is fixed to the support grid 9 by means of a pivot 10, supported by the corners 11. The supporting grid 9 in the form of two beams passing across the filter, arranged parallel to the gap of 50 mm, rests on the longitudinal beam 12.

The device is mounted as follows.

The filter sleeve 1 is put on the plug 2 and clamped on it with a collar 3. The sleeve is assembled in this way by means of an eyebolt 4 is put on a loop-shaped brace 5, then the upper ends of the loop-shaped bracket 5 are pressed inwards and a spring 6 is put on it. After the ends brackets 5 are threaded through the spring 6, they are supported on the upper edge of the spring. Chain 8 is put on the second loop-shaped bracket 7, passes the bracket 7 into the opening of the chain link 8 and is similarly inserted into the spring 6. The filter sleeve thus assembled is lifted to the support grid 9 with the help of a rope and, compressing the spring with a force of 600-700 N or approximately 50-60% of its length, fixed on the support

lattice, the passage in the chain link 8, raised above the corners 11, the king pin 10, and leave the sleeve in this position.

The device works as follows.

In the filtering mode, a slight (30-40 mm) shortening of the filtering sleeve occurs due to its expansion. At the same time, the plug 2, on which the sleeve 1 is suspended, is lowered by 30-40 mm and through the eye bolt 4 t there is no down bracket 5 hooked by its bent ends to the upper edge of the spring 6. Since the lower edge of the spring 6 is fixed (it rests on the bent the ends of the bracket 7 suspended on the chain 8), then when the bracket 5 is lowered, the spring 6 is further compressed. After

filtering mode, all elements of the device return to their original position, keeping the sleeve in a tight state.

Regeneration mode device

it works in the same way, with the only difference that the bending of the fabric of the sleeve takes place inside and the sleeve is shortened by 50-60 mm. When stretching the filter sleeve 1

the spring 6, unclenching, lifts the loop-shaped bracket 5, which through the eyebolt 4 lifts up the plug 2, on which the filtering sleeve 1 is fastened with the help of the clamp 3, and selects its extension.

The presence of elastic deformations in the compression spring with a height of 300-400 mm makes it possible to maintain the sleeve in a permanently tensioned state, ensuring

final tension 300-450 N.

The specified spring sizes are sufficient for uninterrupted operation of the bag filter during the entire gas cleaning time. In case the stretch of fabric of the filter hose is large enough (for certain types of staple fabrics, for example, L-2 art. 136, L-3 art. 216 , pt. 86033, etc.), through

a certain period of operation is necessary to re-filter the filter sleeves. To do this, with the gas cleaning stopped, chain 8 is pulled until the kingpin is weakened.

10, after it is pulled out, the chain 8 is lifted, and together with it through the loop-shaped bracket 7, the spring 6, the bracket 5 and the eye bolt 4 lift the plug 2, onto which the sleeve 1 is fixed with the help of a collar 3. The chain 8. until the entire stretch of the fabric of the filtering hose 1 is selected, then the spring 6 is compressed with a force of 600-700 N, performing operations in the described sequence.

The use of a flexible suspension in the form of connected links, such as a chain, allows initial tension with the required force and, if necessary, retention of the filter sleeves without dismantling them. Even spring breakage leaves the device operable. For example, if one link in a spring is destroyed, the spring.

II

decreases in height by the coil pitch, while maintaining operational reliability.

Claims (1)

5 claims A device for attaching a bag filter, comprising a sleeve attached by a suspension to a support grid with a tension device in the form of a spring with a loop-shaped clip placed inside it, the bent ends of which are attached to the upper edges of the spring, and the loop is connected to the sleeve In order to increase the reliability of fastening, the tensioning device is equipped with an additional mirror bracket, fixed by bent ends to the lower edge of the spring, and looped through the suspension to the grille.