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
  • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
  • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
  • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
  • B01D29/13—Supported filter elements
  • B01D29/15—Supported filter elements arranged for inward flow filtration
  • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
  • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
  • B01D29/31—Self-supporting filtering elements
  • B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
  • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
  • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
  • B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
• • 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
  • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
  • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
  • B01D46/2411—Filter cartridges
  • B01D46/2414—End caps including additional functions or special forms
• • 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
  • B01D46/62—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 series
  • B01D46/64—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 series arranged concentrically or coaxially
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2201/00—Details relating to filtering apparatus
  • B01D2201/40—Special measures for connecting different parts of the filter
  • B01D2201/4084—Snap or Seeger ring connecting means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
  • B01D2265/04—Permanent measures for connecting different parts of the filter, e.g. welding, glueing or moulding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
  • B01D2271/02—Gaskets, sealings
  • B01D2271/027—Radial sealings

Definitions

• the invention relates to a filter insert for a solid filter which has a bellows (star filter) made of gas or liquid permeable material, e.g. Filter paper.
• a bellows star filter
• star filter pleats can be damaged by the action of moisture or mechanical damage when the star filter cartridge is used, as a result of which the filter cartridge no longer functions.
• the breakthrough of the material to be filtered can then damage the aggregates of the filter apparatus or the solid matter filter. If the filter breaks through, this can also endanger the environment or people if dangerous bulk goods or dust escape to the outside.
• the object of the invention is therefore to design a filter insert with a star filter so that damage to one or more star filter folds does not endanger the environment or the operation or function of the filter system is maintained.
• a filter wall or an inner tube is provided in the bellows or in the interior of the star filter, which is surrounded by the star filter and consists of filtering material.
• This filter tube ensures that if the star filter or one or more folds of the star filter is damaged, a further filtering layer is provided which prevents the material to be filtered from breaking through.
• the filter tube Another advantage of the filter tube is that the bellows (the star filter) is dimensionally stabilized by the filter tube, which plays a role in particular in long fitting operations which are essentially axially stressed and thus tend to buckle the star filter.
• Star filter and integrated filter tube can consist of different filter materials depending on the application.
• filter inserts are expediently used in the normal case in which the star filter and filter tube are made of the same material, e.g. Filter paper.
• a filter tube can be used which is structured on the surface or its surface in such a way that the folds of the star filter are supported by bellows.
• the surface structure of the filter tube can have longitudinal webs which extend into the pockets of the respective folds pointing towards the interior of the star filter in order to support them against collapse.
• These longitudinal webs preferably have a cross section that essentially fills the pockets of the star filter.
• the longitudinal webs or ribs can be made of foam, for example. stand, which is foamed onto the outer circumference of the filter tube.
• Star filter and filter tube can be arranged to each other so that the folds or the indentations between the folds sit with their bottoms on the filter tube in order to achieve an optimal support function of the filter inner tube.
• the shape stabilization can be further improved, regardless of the bellows on the filter tube is fixed by gluing or sewing or the like.
• FIG. 1 shows a schematic perspective view of a filter insert with an externally arranged star filter and an internally arranged filter tube;
• FIG. 2 shows a schematic perspective view of an alternative embodiment of a filter insert which has an externally arranged star filter and an internally arranged filter tube with an applied longitudinal web structure;
• FIG 3 shows a section through an essentially rotationally symmetrical filter insert which is held in an opening of a holding plate of the filter apparatus by means of end pieces.
• the filter insert 1 shown in Fig. 1 has a bellows 2 (star filter), the axially extending edges 2.1 and star-shaped successive pockets 6, the side of the pocket flanks 6.1. and 6.2 are limited.
• a filter tube 3 is arranged axially in the interior 5 of the bellows 2 and is completely enclosed by the bellows 2 in the axial longitudinal direction.
• the bellows 2 and the filter tube 3 consist of the same filter material, for example filter paper.
• the filter insert 1.1 according to FIG. 2 differs from the filter insert 1 according to FIG. 1 essentially in that longitudinal webs 4 abutting against one another are applied to the surface 7 of the filter tube 3 and are rib-shaped or lamellar-shaped on the surface 7 in the direction of the longitudinal axis of the filter and have a triangular cross-section (hatched).
• the longitudinal webs 4 extend into the pockets 6 of the bellows 2 and essentially fill them in order to prevent the pocket flanks 6.1., 6.2 of the respectively associated pocket 6 from collapsing.
• the longitudinal webs 4 are e.g. made of foam, which is foamed onto the filter tube 3. The foam does not hinder the passage of gas or liquid laden with solids, since this medium can easily pass through the foam due to its open cell structure.
• the longitudinal webs can also be part of the filter tube or be designed as a casing of the filter tube.
• the bellows 2 can be fixed on the surface of the filter tube 3 by gluing, sewing or the like. That can e.g. B. happen that in places on the outer surface of the bellows 2 adhesive is applied which diffuses through the filter paper of the bellows 2 and forms an adhesive connection with the subsequent filter tube.
• FIG. 3 shows how the filter insert 1 is fastened in the filter apparatus, for example on a metal holding plate 18, which is provided for carrying the filter insert 1.
• the cylindrical bellows 2 is connected at one of its ends to a retaining lip 8 as a closing piece, which is essentially ring-shaped in a rotationally symmetrical manner with respect to the axis of symmetry of the bellows 2.
• the holding lip 8 is provided with an annular circumferential outer notch 10, which is provided on the outside of the holding lip 8, and an inner notch 11, which is formed on the inside on the holding lip 8, that is to say in an annular circumferential manner towards the interior 5 of the filter insert.
• At the other end of the bellows 2 it is connected to an end ring 12, which likewise runs rotationally symmetrically to the axis of symmetry of the bellows 2 and has a notch 13 on the inside.
• the filter tube 3 Arranged in the interior 5 of the bellows 2 is the filter tube 3, which is fastened or cast in at one end in a spreading part 16 and at the opposite end in a disk 14.
• the expansion part 16 is annular, rotationally symmetrical to the axis of symmetry of the bellows 2 and has an outer circumferential expansion ring 17 which engages in the inner notch 11 of the retaining lip 8. Above the expansion ring 17, the expansion part 16 is chamfered to facilitate insertion of the filter tube 3 with the expansion part 16 into the interior 5 of the bellows 2.
• the disc 14 has a circumferentially annular projection 15, which is designed so that it fits into the notch 13 of the end ring 12.
• the inserted spreader on the filter tube 3 presses the assigned holding lip 8 outwards, as a result of which the edge of the opening 19 of the holding plate 18 sits in the outer notch 10 of the holding lip 8 and the entire filter insert 1 on the holding plate 18 due to the existing pressure of the expanding part 16 is attached. That with conventional filters metallic support tube used in this construction is superfluous.
• the bellows and / or the filter tube 3 can be stepped or cranked so that the filter bellows 2 rests on the filter tube 3.
• a dashed line in FIG. 3 shows a disposal route for the medium to be filtered.
• the medium A to be filtered passes the pleated sheet 2 and then that
• Filter tube 3 solids being retained by the pleated sheet 2 and the filtered medium B leaving the filter to the outside. In the event of damage to one or more folds of the bellows 2, the solids are retained on the surface 7 of the internal filter tube.
• the retaining lip 8, the end ring 12, the washer 14 and the expansion part 16 are made of the same material, preferably polyurethane, and are applied to the filter tube 3 or the bellows 2 by a casting process.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=6376608

Family Applications (1)

Country Status (2)

Cited By (10)

Families Citing this family (12)

Citations (4)

Family Cites Families (3)

• 1989
  • 1989-03-17 DE DE3908828A patent/DE3908828A1/de active Granted
• 1990
  • 1990-03-19 WO PCT/EP1990/000452 patent/WO1990011116A1/de unknown

Patent Citations (4)

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