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WO1991006359A1 - Dispositif pour la separation des particules de poussieres contenues dans un gaz - Google Patents

Dispositif pour la separation des particules de poussieres contenues dans un gaz Download PDF

Info

Publication number
WO1991006359A1
WO1991006359A1 PCT/SE1990/000679 SE9000679W WO9106359A1 WO 1991006359 A1 WO1991006359 A1 WO 1991006359A1 SE 9000679 W SE9000679 W SE 9000679W WO 9106359 A1 WO9106359 A1 WO 9106359A1
Authority
WO
WIPO (PCT)
Prior art keywords
rods
bag
filter
filter member
eye
Prior art date
Application number
PCT/SE1990/000679
Other languages
English (en)
Inventor
Odd Edgar BJARNØ
Original Assignee
ABB Fläkt AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Fläkt AB filed Critical ABB Fläkt AB
Publication of WO1991006359A1 publication Critical patent/WO1991006359A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material

Definitions

  • the present invention relates to a device for sepa- rating particles from a gas by screening.
  • the device com ⁇ prises a bag-shaped, elongate filter member, such as a filter bag or a filter cell, at least three longitudinal, substantially parallel rods positioned at a distance from each other adapted to the inner dimensions of the filter member in the expanded state thereof, and transverse stiffening means for fixing the distance between the rods.
  • a common method of separating particles from a gas is to let the gas pass through a fabric filter.
  • This usually con ⁇ tains a plurality of bag-shaped, elongate filter members which are made of PTFE ( olytetrafluoroethylene), fibre- glass or some other suitable filtering material in the form of filter bags or filter cells.
  • PTFE olytetrafluoroethylene
  • fibre- glass or some other suitable filtering material in the form of filter bags or filter cells.
  • the gas pressure keeps the filter member expanded, but in the second case, it compresses the filter member so as to collapse.
  • the direction of gas flow therethrough is reversed, whereby the filter member is subjected to the action of the gas in the opposite direc- tion.
  • FIG. 1 illustrates an example of a conventional filter cage 1 for supporting a filter bag 2.
  • This cage comprises nine rods 3 which are held together by holding means 4 and form, together with these, a rigid construc ⁇ tion.
  • the bag is kept expanded adjacent the rods 3, whereas between the rods it forms concave folds.
  • the folds are extended during cleaning, when the direction of gas flow is reversed, and this motion of the folds breaks up and throws off the formed dust cake from the bag.
  • a cage the position of which is not fixed, for supporting a filter bag can also result in the filtering material being unevenly distributed between the rods, i.e. in some places there will be big folds and, consequently, the filtering material will perform great motions and thus be subjected to considerable strain, whereas in other places there will be small folds and small motions and, thus, poor cleaning of the filtering material during the cleaning operation.
  • the cage can of course be pro ⁇ vided with further rods, which means however that the cage will be heavier and more expensive in manufacture. This especially applies to long filter bags.
  • the object of the present invention therefore is to provide a simple, light-weight and cheap device for sepa ⁇ rating particles from a gas by screening, comprising a bag-shaped, elongate filter member, such as a filter bag, as well as rods and stiffening means which are designed in such manner that the filter member can be supported and expanded, without the filtering material being subjected at the same time to high mechanical loads.
  • a bag-shaped, elongate filter member such as a filter bag
  • rods and stiffening means which are designed in such manner that the filter member can be supported and expanded, without the filtering material being subjected at the same time to high mechanical loads.
  • the position of the rods will be fixed relative to the filtering material. This means that there will be no sliding motion between the rods and the filtering material and no irregular formation of folds in the filtering mate ⁇ rial between the rods.
  • the means are preferably shaped as channels, grooves or rails extending along the inner surface of the filter member in the longitudinal direction thereof, preferably in substantially the entire longitudinal direction there ⁇ of.
  • the channels are preferably made of the same material as the filter member, whereas the grooves or rails are made of plastic, e.g. PTFE, or metal, e.g. aluminium.
  • the stiffening means are preferably arranged along the rods over substantially the entire length thereof.
  • the stiffening means are preferably designed as a regular polygon, preferably a quadrangle, or as a star.
  • the stiffening means are provided with eyes or hooks which are fixedly mounted in the channels around the rods.
  • the inner dimensions of the eyes or hooks are preferably greater than the outer dimensions of the rods, which, when mount- ing the filter member in a filter housing, makes it easy to insert the rods into the eyes or hooks placed in the channels.
  • the eyes or hooks are arranged in the corners of the stiffening means, and when the stiffening means are designed as a star, the eyes or hooks are arranged in the points of the stiffening means.
  • the rods are fixedly connected with the corners or the points of the stiffening means, depending on whether the stiffenings means are shaped as a regular polygon or a star.
  • Fig. 1 illustrates a conventional cage for supporting a filter bag.
  • Fig. 2 is a schematic view of an embodiment of the device according to the present invention.
  • Fig. 3 is a top plan view of the device in Fig. 2.
  • Fig. 4 is a schematic view of a further embodiment of the device according to the present invention.
  • Fig. 2 shows a filter bag 5 which is in the form of a conventional, closed-end cylindrical hose having a length of 3-10 m, usually about 10 m, and a diameter of
  • the bag is provided with four parallel channels 6 which extend along the inner sur- face of the bag in the entire longitudinal direction thereof and have an inner diameter of 10-40 mm, usually about 20 mm.
  • the channels are sewn on to the bag inner surface during manufacture thereof and are preferably made of the same material as the bag which is made of, for example, fibre-glass that withstands high operating tempe ⁇ ratures and has high chemical resistance to noxious sub ⁇ stances, such as sulphur, but has low mechanical strength.
  • transverse stiffening means 7 are inserted in a given spaced-apart relationship, 0.5-2 m, usually about 1 m, into the channels 6 over the entire length thereof.
  • the stiffening means are designed as a quadrangle in each corner of which an eye 8 is posi ⁇ tioned.
  • One eye is inserted into each channel 6 via an opening 9 formed in the wall of the channel.
  • the outer diameter of the eye is 10-40 mm, usually about 20 mm, whereas its inner diameter is 7-37 mm, usually about 17 mm.
  • a rod 10 is inserted in each channel 6 and the eyes 8 thereof, and as appears from Fig. 3, the outer diameter of the rods, which is 5-35 mm, usually about 15 mm, is smaller than the inner diameter of the eyes 8. This means that during mounting and dismounting of the filter bag 5 in and, respectively, from a filter housing (not shown), it will be easy to insert and, respectively, pull out the rods 10 in and, respectively, from the eyes 8 placed in the channels 6.
  • the rods 10 are preferably of the same length as the channels 6 and thus extend along the bag 5 in the entire longitudinal direction thereof.
  • the eyes 8 of the stiffening means 7 fix, in coopera ⁇ tion with the channels 6, the position of the rods rela ⁇ tive to the filtering material of the bag, at the same time as "they prevent, by their stiffening effect on the rods, excessive inward bending of the rods during opera- tion, as the dust-laden gas which is to be cleaned flows from the bag outside and inwards and exerts a considerable gas pressure upon the filtering material.
  • the channels are positioned symmetrically at the same distance from each other along the bag inner surface, which means that the folds of the filtering material that are formed between the rods 10 during operation are of the same size along the entire circumference of the bag.
  • the appearance of the bag during operation is indicated by dashed lines in Fig. 3.
  • the bag instead assumes the shape indicated by full lines in Fig. 3.
  • Fig. 4 illustrates a filter bag 11 provided with four parallel longitudinal rails 12 which are positioned symme ⁇ trically at the same distance from each other along the bag inner surface.
  • Each rail is formed with a longitudinal groove 13 facing the centre of the bag.
  • the rails are made of PTFE or aluminium and are glued to the inner surface of the bag in the entire longitudinal direction thereof.
  • the rods 14 are fixedly interconnected by stiffening means 15 which are arranged along the rods in a given spaced-apart relationship, 0.5 - 2 m, usually about 1 m, over the entire length thereof.
  • the stiffening means are shaped as a star with four points which are each welded to a rod 14.
  • the rods 14 and the stiffening means 15 are consequently inserted into the bag 11 as an inte ⁇ gral unit, the rods 14 being inserted in the rails 12, whereas the stiffening means 15 are inserted in the grooves 13 of the rails.
  • the rods 14 are preferably of the same length as the rails 12 and accordingly extend along the bag 11 in the entire longitudinal direction thereof.
  • the position of the rods relative to the filtering mate ⁇ rial of the bag is in this case fixed by the rails only. They provide, however, sufficient fixing of the rods also during the cleaning operation.
  • the filter bag 11 is, during operation and cleaning, of the same appearance as the filter bag 5.
  • the channels 6 can, for example, be glued or welded instead of sewn on to the bag inner surface.
  • the channels can also be integrated with the filter bag and then, con ⁇ sequently, need not be attached to the surface of the filter bag.
  • the rails 12 can, for example, be welded or sewn instead of glued to the bag inner surface.
  • the stiffening means 7 oan for example, be designed as the stiffening means 15, and vice versa, the eyes 8 being in the first case attached to the points of the star.
  • the channels 6 or the rails 12 can, for example, be attached to the bag outer surface, instead of the inner surface thereof.
  • the stiffening means 7 can, for example, be provided with hooks instead of eyes, and of course the eyes need not be of circular shape.
  • the rods 10 and 14 can, for example, be composed of a plurality of short members, e.g. 3 members, instead of being made in one piece.
  • the stiffening means 15 can, for example, be inte- grated with the rods 14, instead of being welded thereto.
  • the shape of the stiffening means and the number of rods and channels or rails of course vary with the appear ⁇ ance of the filter member which is to be expanded and supported.
  • transverse stiffening means means that the stiffening means extend in the transverse direction of the filter member, the angle between the stiffening means 7 and 15 and the channels 6 or the rails 12 of the filter member not necessarily being 90°.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Filtering Materials (AREA)

Abstract

Le dispositif décrit, qui sert à séparer les particules de poussières contenues dans un gaz par criblage, comprend un filtre allongé en forme de sac (5) constitué par exemple par un filtre à sac ou à cellule, au moins trois tiges longitudinales sensiblement parallèles (10) disposées à une certaine distance entre elles et adaptées aux dimensions internes du filtre à l'état expansé, ainsi qu'un organe de rigidification transversale (7) qui sert à maintenir fixe la distance entre les tiges. Les tiges (10) coopèrent en outre avec un organe (6) placé sur la surface du filtre (5) et servant à recevoir les tiges en position fixe.
PCT/SE1990/000679 1989-10-25 1990-10-19 Dispositif pour la separation des particules de poussieres contenues dans un gaz WO1991006359A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8903533A SE464914B (sv) 1989-10-25 1989-10-25 Anordning foer avskiljning av partiklar fraan en gas
SE8903533-1 1989-10-25

Publications (1)

Publication Number Publication Date
WO1991006359A1 true WO1991006359A1 (fr) 1991-05-16

Family

ID=20377265

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1990/000679 WO1991006359A1 (fr) 1989-10-25 1990-10-19 Dispositif pour la separation des particules de poussieres contenues dans un gaz

Country Status (3)

Country Link
AU (1) AU6625790A (fr)
SE (1) SE464914B (fr)
WO (1) WO1991006359A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999025458A1 (fr) * 1997-11-14 1999-05-27 Albany International Corp. Cage modulaire de sac filtrant
WO2008119345A1 (fr) * 2007-03-30 2008-10-09 Gea Process Engineering A/S Structure de support pour un sac filtrant et procédé d'utilisation de la structure de support
EP2854984A4 (fr) * 2012-05-31 2016-01-27 Advancetex Internat Pty Ltd Cage de filtre et ensemble filtre pour filtre à manches
WO2016193530A1 (fr) * 2015-05-29 2016-12-08 Pmu Air Oy Unité de filtre pour filtrage d'air et procédé de nettoyage dudit filtre
DE102016122130A1 (de) * 2016-11-17 2018-05-17 Camfil Apc Gmbh Halteschiene zum Anbringen an einer Filterpatrone, Einsatz zum Unterteilen eines Innenraums und Filterpatrone zum Abscheiden von Partikeln

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE401457B (sv) * 1975-10-08 1978-05-16 Ind Tekniska Konstruktioner Ab Korg for uppstagning av en slang i ett slangfilter
US4202677A (en) * 1977-06-22 1980-05-13 Clarke's Sheet Metal, Inc. Filter bag with removable shaping members
SE445015B (sv) * 1984-10-04 1986-05-26 Flaekt Ab Filteranordning

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE401457B (sv) * 1975-10-08 1978-05-16 Ind Tekniska Konstruktioner Ab Korg for uppstagning av en slang i ett slangfilter
US4202677A (en) * 1977-06-22 1980-05-13 Clarke's Sheet Metal, Inc. Filter bag with removable shaping members
SE445015B (sv) * 1984-10-04 1986-05-26 Flaekt Ab Filteranordning

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999025458A1 (fr) * 1997-11-14 1999-05-27 Albany International Corp. Cage modulaire de sac filtrant
US5951726A (en) * 1997-11-14 1999-09-14 Albany International Corp. Modular filter bag cage
WO2008119345A1 (fr) * 2007-03-30 2008-10-09 Gea Process Engineering A/S Structure de support pour un sac filtrant et procédé d'utilisation de la structure de support
JP2010522632A (ja) * 2007-03-30 2010-07-08 ゲア・プロセス・エンジニアリング・アクティーゼルスカブ フィルターバッグの支持構造及びその支持構造の使用方法
JP4938126B2 (ja) * 2007-03-30 2012-05-23 ゲア・プロセス・エンジニアリング・アクティーゼルスカブ フィルターバッグの支持構造及びその支持構造の使用方法
CN101663078B (zh) * 2007-03-30 2012-06-27 Gea工艺工程有限公司 用于滤袋的支承结构和使用该支承结构的方法
US8303682B2 (en) 2007-03-30 2012-11-06 Gea Process Engineering A/S Support structure for a filter bag and a method of using the support structure
EP2854984A4 (fr) * 2012-05-31 2016-01-27 Advancetex Internat Pty Ltd Cage de filtre et ensemble filtre pour filtre à manches
WO2016193530A1 (fr) * 2015-05-29 2016-12-08 Pmu Air Oy Unité de filtre pour filtrage d'air et procédé de nettoyage dudit filtre
DE102016122130A1 (de) * 2016-11-17 2018-05-17 Camfil Apc Gmbh Halteschiene zum Anbringen an einer Filterpatrone, Einsatz zum Unterteilen eines Innenraums und Filterpatrone zum Abscheiden von Partikeln
EP3323494A1 (fr) * 2016-11-17 2018-05-23 Camfil APC GmbH Rail de retenue destiné à être appliqué sur une cartouche de filtrage

Also Published As

Publication number Publication date
SE8903533D0 (sv) 1989-10-25
AU6625790A (en) 1991-05-31
SE8903533L (sv) 1991-04-26
SE464914B (sv) 1991-07-01

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