WO1997030773A1 - Systeme de filtres a manche - Google Patents

Systeme de filtres a manche Download PDF

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Publication number
WO1997030773A1
WO1997030773A1 PCT/CH1997/000053 CH9700053W WO9730773A1 WO 1997030773 A1 WO1997030773 A1 WO 1997030773A1 CH 9700053 W CH9700053 W CH 9700053W WO 9730773 A1 WO9730773 A1 WO 9730773A1
Authority
WO
WIPO (PCT)
Prior art keywords
blow
gas
bag filters
bag
compressed air
Prior art date
Application number
PCT/CH1997/000053
Other languages
German (de)
English (en)
Inventor
Ulf Tomas Alterby
Andreas Kwetkus
Original Assignee
Abb Research Ltd.
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 Research Ltd. filed Critical Abb Research Ltd.
Priority to AU15876/97A priority Critical patent/AU1587697A/en
Publication of WO1997030773A1 publication Critical patent/WO1997030773A1/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
    • B01D46/04—Cleaning filters
    • 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
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
    • 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
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/206—Special forms, e.g. adapted to a certain housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/207—Triangular shape

Definitions

  • the invention relates to a bag filter arrangement, comprising a housing with a first gas space for the gas to be cleaned and a second gas space for the cleaned gas, which are separated from one another by an intermediate floor, with a plurality of openings in the intermediate floor for receiving bag filters , a dust collecting chamber in the bottom area of the first gas space and an inlet opening in the first gas space for supplying the gas to be cleaned, a pipe arrangement arranged in the second gas space above the intermediate floor, which is connected to a compressed air source, through which the interior of the bag filter can be impacted with compressed air, and an outlet opening for the cleaned gas.
  • a bag filter arrangement of this type is known, for example, from US Pat. No. 4,157,899.
  • bag filters are used to separate particles. These bag filters comprise a basket-like frame, over which a textile filter material is placed and attached to the frame. The exhaust gas flows from the outside into the interior of the filter bag at a comparatively low speed. The particles carried in the exhaust gas remain in and on the filter material. The cleaned exhaust gas leaves the bag filter upwards.
  • a large number of such bag filters are basically arranged in a filter housing, the individual bag filters being connected in parallel with respect to the exhaust gas to be cleaned.
  • This housing (eng. Baghouse) has a first gas space for the gas to be cleaned and a second gas space for the cleaned gas, which are separated from one another by an intermediate floor.
  • the intermediate floor is provided with a large number of openings in which the individual filter hoses are suspended.
  • a dust collecting chamber is provided in the floor area of the first gas space.
  • the filter cake accumulating on the surface of the bag filter is removed at regular time intervals.
  • a pipe arrangement with blow-out openings is provided in the second gas space, which is connected to a compressed air source, through which blow-out openings push-in compressed air is introduced into the interior of the filter bags.
  • the filter housing is circular.
  • the cleaning is carried out by means of a carousel-like arrangement with two rotatable arms designed as a blowpipe.
  • the two arms have a plurality of outlet connections, each of which Can apply half of all bag filters lying on a diameter.
  • the bag filters In order to make better use of the available cross section of the intermediate floor, the bag filters have an oval cross section.
  • the cross-section of the outlet nozzle is adapted to the cross-section of the bag filter.
  • a dust filter is known from DE 43 24 065 A1, in which bag filters with a round cross section are arranged in several rows and a compressed air pipeline is provided for each of these parallel rows. This allows simultaneous cleaning of all bag filters, but the effectiveness of the cleaning still leaves something to be desired.
  • the object of the invention is to create a bag filter arrangement of the type mentioned at the outset which, in addition to an optimal utilization of the construction volume, enables all bag filters to be cleaned at the same time and an improved dust yield.
  • this object is achieved according to the invention in that the downward-pointing blow-out openings or blow-out connectors are assigned to bag filters, each of which have an at least approximately parallel surface to adjacent hose filters that can be acted upon with compressed air at the same time.
  • Bag filters with the cross section of a regular polygon are suitable, but also bag filters with a smaller average diameter in the longitudinal direction of the blowpipe than transverse to the longitudinal direction are suitable.
  • oval cross-sectional shapes with a constriction in the middle section are advantageous because, above all, they take advantage of the recently developed pulse generation technology with piston / cylinder arrangements instead of the otherwise conventional membrane valve technology.
  • Fig.l shows a longitudinal section through a conventional bag filter arrangement
  • 2 shows a plan view of the intermediate floor of the bag filter arrangement according to FIG. 1;
  • FIG. 3 shows an enlarged cross section through the upper end of a bag filter according to Fig.l or 2;
  • FIG. 4 shows an embodiment of the invention with bag filters with a square cross section, a tube serving two rows of bag filters lying next to one another;
  • Bag filters with a hexagonal cross-section, with adjacent rows of bag filters being offset by half a pitch;
  • FIG. 6 shows a third exemplary embodiment of the invention with bag filters with a triangular cross section, a tube serving two rows of bag filters lying next to one another;
  • FIG. 7 shows a fourth embodiment of the invention with bag filters with a triangular cross section, wherein a tube serves three rows of bag filters lying next to one another;
  • FIG. 8 shows a section through the upper end of the bag filter according to FIG. 7 on an enlarged scale
  • FIG. 9 shows a fifth exemplary embodiment of the invention with a bag filter with an oval cross section, to which two blow-out nozzles are assigned;
  • FIG. 10 shows a modification of the embodiment according to FIG. 9, a single nozzle with an oval cross section being provided instead of two outlet nozzles.
  • FIGS. 1 and 2 A very simplified form of the construction of a bag filter arrangement is shown in FIGS. 1 and 2.
  • a housing 1 is divided by a horizontally extending intermediate floor 2 into a first gas space 3 and a second gas space 4.
  • the gas to be cleaned which contains particles, is introduced into the first gas space 3 through an inlet opening 5.
  • the cleaned gas leaves the second gas space 4 via an outlet opening 6.
  • the intermediate floor 2 has a large number of openings or openings, in which bag filters 7 are suspended, which extend and extend in the vertical direction over the largest part of the housing 1 closed at the bottom.
  • the interior of the bag filter is in free communication with the second gas space 4, the clean gas space.
  • the housing base 8 tapers in a funnel shape and opens into a closable discharge opening 9.
  • the filter residue (filter cake) cleaned from the bag filters 7 collects in the base section of the housing and can be disposed of from there.
  • a pipe arrangement consisting of several pipes 10 running in parallel is provided in the second gas space 4, which is connected to a compressed air source 11.
  • the tubes 10 have a blow-out nozzle 12 directed downwards into the inside of the bag filter 7 (cf. is shown on an enlarged scale).
  • a valve (not shown) between the compressed air source 11 and the pipe arrangement generates, by rapid opening and closing, compressed air pulses in the pipes 10, which are expelled into the interior of the bag filter 7 through the exhaust ports. broad. These pulses cause the filter cake to detach from the surface of the bag filter, and the filter cake falls into the funnel-shaped bottom section of the housing 1.
  • bag filter arrangements are known.
  • the downward-pointing blow-out openings or blow-out nozzles are assigned to bag filters, each of which has a parallel or at least approximately parallel surface to adjacent bag filters which can be acted upon with compressed air. It is particularly advantageous if the blow-out openings or blow-out spouts 12 on the tubes 10 are each assigned to at least two adjacent bag filters and thus "operate" at least two adjacent bag filters.
  • FIGS. 4 and 5 This is shown schematically in FIGS. 4 and 5, for example using bag filters with a square or hexagonal cross section.
  • the tube 10 - in the example case Rectangular cross-section tube - runs approximately symmetrically above two adjacent rows of bag filters.
  • the outlet spigots 12a, 12b with a circular cross section are arranged in pairs next to one another, as can be seen from the cross section according to FIG. 4 .
  • tubes with a rectangular cross section those with a circular cross section or oval tubes can also be used.
  • the geometry of the blow-out nozzles 12a, 12b which in the limit case can be slots or openings on the underside of the tubes 10.
  • bag filters with a regular triangular cross section can also advantageously be used, as is shown schematically in FIGS. 6 and 7.
  • a tube 10 with blowout nozzles 12a, 12b arranged in pairs next to one another “serves” two adjacent bag filters 7.
  • FIGS. 6 to 8 show a further embodiment of the invention with bag filters 7 with a triangular cross section, two rows of bag filters (horizontally running in the example in the drawing) being nested one inside the other, ie the corners of the triangles of one row each lie between adjacent triangles of the another row.
  • Alley-like spaces 13 are formed between two pairs of rows, each of which runs perpendicular to the direction of flow of the gas flowing through the bag filter arrangement.
  • a tube 10 is assigned to two rows of bag filters, which in the case of FIG cleaning gas, that is to say runs perpendicular to the alleys 13, ie does not serve two adjacent bag filter rows, but rather is assigned to a single bag filter in each row.
  • the tube has, in addition to two lateral blow-out nozzles 12a, 12b which project out to the left and right and then point downward, a third central blow-out nozzle 12c.
  • the connecting piece 12c opens into the bag filter 7 of the second (horizontal in the drawing) row, while the two lateral outlet ports 12a, 12b each serve two bag filters 7 of every second row.
  • the tubes adjacent to the tube 10 are constructed in the same way as far as the arrangement of the outlet ports 12a, 12b, 12c is concerned, but the corresponding outlet ports are offset by a pitch b compared to the adjacent tube 10.
  • pipes 10 which run in the direction of the gas flowing through the bag filter arrangement, they can also run perpendicular to this flow direction, which is not specifically shown in the drawing, because the distribution of the bag filters 7 over the housing cross section or over the intermediate floor 2 is one is largely regular.
  • FIGS. 9 and 10 Another possibility for increasing the packing density is illustrated schematically in FIGS. 9 and 10.
  • the downward-pointing blow-out openings or blow-out spouts 12a, 12b are each assigned to a bag filter 7, the mean diameter of which in the direction of the pipe 10 is smaller than transverse to the longitudinal direction of the pipe 10.
  • a single outlet port 12d can be used here (see FIG. 10).
  • Its cross section is the cross section of the Bag filter 7 adapted, ie its average diameter in the direction of the tube 10 is smaller than transverse to the longitudinal direction of the tube.
  • Both geometries are particularly suitable for bag filters with glasses-like cross-section, ie an oval provided with a constriction 14 or e, as shown in FIGS. 9 and 10. The constriction results from the flow resistance of the filter material.
  • a blow-out spigot 12 d if the tube 10 is not too far from the upper opening of the bag filter 7, a transverse slot 15 can also be provided in the tube 10.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un système de filtres à manche qui comporte un boîtier (1) comprenant une première chambre de gaz (3) pour le gaz à purifier et une seconde chambre de gaz (4) pour le gaz purifié, les deux chambres de gaz étant séparées l'une de l'autre par un fond intermédiaire (2). Les filtres à manche (7) sont suspendus à l'intérieur d'ouvertures pratiquées dans le fond intermédiaire. Un système de tubulures comportant des ouvertures ou des tubulures de purge dirigées vers le bas est disposé au-dessus du fond intermédiaire dans la seconde chambre de gaz, et est raccordé à une source d'air comprimé grâce à laquelle de l'air comprimé peut être appliqué par à-coups à l'intérieur des filtres à manche (7). Pour augmenter la densité de tassement des filtres à manche (7) et obtenir des rendements plus élevés de collecte de poussières, chacune des ouvertures ou des tubulures de purge est associée aux filtres à manche (7) qui présentent chacun une surface au moins approximativement parallèle aux filtres à manche (7) adjacents auxquels de l'air comprimé peut être simultanément appliqué et peuvent ainsi être nettoyés.
PCT/CH1997/000053 1996-02-22 1997-02-17 Systeme de filtres a manche WO1997030773A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU15876/97A AU1587697A (en) 1996-02-22 1997-02-17 Hose filter arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19606508A DE19606508A1 (de) 1996-02-22 1996-02-22 Schlauchfilteranordnung
DE19606508.9 1996-02-22

Publications (1)

Publication Number Publication Date
WO1997030773A1 true WO1997030773A1 (fr) 1997-08-28

Family

ID=7786042

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1997/000053 WO1997030773A1 (fr) 1996-02-22 1997-02-17 Systeme de filtres a manche

Country Status (3)

Country Link
AU (1) AU1587697A (fr)
DE (1) DE19606508A1 (fr)
WO (1) WO1997030773A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101616724A (zh) 2006-11-30 2009-12-30 唐纳森公司 清洁过滤元件的喷嘴结构和方法
ITAN20070025U1 (it) * 2007-10-24 2009-04-25 S E I C O Impianti S R L Impianto per rigenerare filtri di una camera filtro per aeriformi.
US8118900B2 (en) 2009-09-30 2012-02-21 Donaldson Company, Inc. Dust collector and methods

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH524386A (de) * 1970-10-09 1972-06-30 Meyer Maschinen Und Muehlenbau Schüttgutabscheider mit Filtervorrichtung
FR2561536A1 (fr) * 1984-03-21 1985-09-27 Dumont Lucien Procede et installation pour assurer le nettoyage d'elements filtrants d'un dispositif de depoussierage de gaz
EP0248982A1 (fr) * 1986-05-28 1987-12-16 Walther & Cie. Aktiengesellschaft Filtre de dépoussiérage pour gaz
DE8900199U1 (de) * 1989-01-10 1989-03-09 Fabritz, Gerhard, 4150 Krefeld Abreinigungsgebläse für Staubfilteranlagen mit Filtertaschen
FR2719497A1 (fr) * 1994-03-14 1995-11-10 Lahoudere Robert Procédé de polydécolmatage pour dépoussiéreur à manches filtrantes.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2625416C2 (de) * 1976-06-05 1981-10-29 Adolf Dipl.-Ing. 3060 Stadthagen Margraf Staubgasfilter
DE3304350A1 (de) * 1983-02-09 1984-08-09 Schumann Textile Industrieprodukte GmbH, 7858 Weil am Rhein Filter
DE4324065C2 (de) * 1993-07-17 2001-05-31 Reimelt Dietrich Kg Filter, insbesondere Feinstaub-Entlüftungsfilter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH524386A (de) * 1970-10-09 1972-06-30 Meyer Maschinen Und Muehlenbau Schüttgutabscheider mit Filtervorrichtung
FR2561536A1 (fr) * 1984-03-21 1985-09-27 Dumont Lucien Procede et installation pour assurer le nettoyage d'elements filtrants d'un dispositif de depoussierage de gaz
EP0248982A1 (fr) * 1986-05-28 1987-12-16 Walther & Cie. Aktiengesellschaft Filtre de dépoussiérage pour gaz
DE8900199U1 (de) * 1989-01-10 1989-03-09 Fabritz, Gerhard, 4150 Krefeld Abreinigungsgebläse für Staubfilteranlagen mit Filtertaschen
FR2719497A1 (fr) * 1994-03-14 1995-11-10 Lahoudere Robert Procédé de polydécolmatage pour dépoussiéreur à manches filtrantes.

Also Published As

Publication number Publication date
DE19606508A1 (de) 1997-08-28
AU1587697A (en) 1997-09-10

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