WO1999033544A1 - A filter device with air guide - Google Patents

A filter device with air guide Download PDF

Info

Publication number
WO1999033544A1
WO1999033544A1 PCT/SE1998/002329 SE9802329W WO9933544A1 WO 1999033544 A1 WO1999033544 A1 WO 1999033544A1 SE 9802329 W SE9802329 W SE 9802329W WO 9933544 A1 WO9933544 A1 WO 9933544A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
pocket
filter medium
filter
filter device
Prior art date
Application number
PCT/SE1998/002329
Other languages
French (fr)
Inventor
Nils Eric HÖÖG
Original Assignee
Hoeoeg Nils Eric
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
Priority claimed from SE9704691A external-priority patent/SE9704691D0/en
Application filed by Hoeoeg Nils Eric filed Critical Hoeoeg Nils Eric
Publication of WO1999033544A1 publication Critical patent/WO1999033544A1/en

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
    • B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
    • B01D46/0041—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for feeding
    • B01D46/0045—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for feeding by using vanes
    • 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
    • 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
    • B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame

Definitions

  • the present invention relates to a filter device, especially for filtering of gases like air, with a frame construction comprising a first frame and preferably a second frame, for sealing fixation of an edge portion of a filter medium to the frame device, the filter medium consisting of at least one pocket, with its opening turned towards the frame device, which pocket shows substantially plane side walls, preferably connected by approximate triangular gable portions.
  • the filter medium made from fiber material like polyester, consists of a number of pockets, arranged side by side, with their openings turned to the frame device, which in this case consists of two frames between which the filter medium is fixed sealing.
  • the pockets show substantially plane side walls, connected by approximate triangular gable portions.
  • This filter device, and other ones, also comprising a filter medium in the form of pockets of the art just mentioned, show some drawbacks due to the uneven distribution of the flow of particle containing gas, usually air, that is fed to the filter device.
  • the particles are aggregated, at the outset, at the portion of the pockets, that is turned from the frames, and not until thereupon at the portions of the pockets, that re more close to the frames, especially the side walls, which contain most of the surface of the filter medium.
  • An increased pressure drop over the filter medium arises due to the fact that the side walls of the pockets are pressed to each other such that the gas flow is prevented from passing.
  • the filter medium is deemed to be exhausted and in demand of replacement by measurement of the pressure drop over itself by a pressure gauge or differential pressure gauge this in reality occurs already when only about half of the surface of the filter medium is covered by particles, which means, that the filter medium has to be replaced before its filter surface has been utilized and that an unnecessary high cost for fan energy arises.
  • the object of the present invention is to provide a filter device of the type mentioned introductorily, which admits the surface of the filter medium to be completely utilized, such that the cost for fan energy is limited.
  • a filter device is characterized in that the filter device is provided, at the frame device, with at least one gas guide means for said gas, designed such that said side walls of the filter medium are subject to a gas flow, substantially uniformly distributed along the extension of the filter medium from the frame device to the bottom of the pocket.
  • the gas guide means consists of two guide rails, provided at each pocket present, extending along the opening of the pocket, with their elongation substantially parallel to the side walls of the pocket, the guide rails being designed curved and such directed, that a gas flow fed is distributed uniformly along the side walls of the pocket from the frame device to the bottom of the pocket.
  • this comprises a first frame and a second frame for sealing fixation of an edge portion of the filter medium between said frames, when the second frame is pressed to the first frame, the guide rails being fixed to the first frame, turnably adjustable around their longitudinal axes.
  • This design admits the guide rails being adjusted such that the gas flow fed is distributed in the desired fashion along the side walls of the pockets.
  • fixation element should be provided to fix the mutual position of the bottoms of the pockets perpendicular to the longitudinal direction of the guide rails. Otherwise it can occur, that the mutual lateral position of the pockets is changed, subject to the gas flow fed, that is to say they "blow apart".
  • fixation elements may be designed in different ways, e g in the form of several fixation wires, provided spaced between said gable portions.
  • figure 1 shows a view from the feed side of a filter device, that is to say a view along the marks I - 1 in figure 2
  • figure 2 shows a view towards the cross section II- II in figure 1
  • figure 3 shows a view towards a cross section in a filter device with a filter medium in the form of four pockets, with the flow pattern picture of a fresh filter medium
  • figure 4 shows a view of the object of figure 3, with the flow pattern picture of a partly exhausted, plugged filter medium.
  • Figure 5 shows a view of the object of figure 3, provided with fixation elements, while figure 6 shows the object of figure 5 in perspective.
  • a first frame is marked by 1 and a second frame by 2. Between them there is pressed, sealing, the edge portion of a filter medium.
  • the filter medium is designed with four pockets 3,4,5 and 6, which show relatively plane side walls and principally triangle formed gable surfaces.
  • tumably adjustable pairs of guide rails 7 and 8. consist of longitudinal somewhat curved sheets of metal or plastic, mounted on longitudinal axes 12, which in turn are turnable in bearings at the top and at the foot at the first frame. They can be fastened with the aid of double nuts or other suitable means, in the desired rotation position.
  • FIG 3 there is shown, how the gas flow 9 fed is distributed, according to the arrows 10 at a fresh filter medium and according to the arrows 1 1 at a partly exhausted, that is to say plugged, filter medium.
  • the filter device is shown, provided with fixation elements in the form of two lateral wires 12 and 13, provided at different distances from the gable portions of the pockets.
  • the wires are fastened at fixation points, 14,15,16 and 17 at the wire 13 and at the wire 12 at corresponding fixation points.
  • the fixation of the wires to the bottoms of the pockets, that is to say the fixation points can be achieved e g by welding, if the pockets are manufactured from polymer material. Other methods for fixation are of course also possible.
  • the frame device can be of different types, but shall comprise at least one stationary frame.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)

Abstract

A filter device, especially for filtering of gases like air, is disclosed. It has a frame construction (1, 2), for sealing fixation of an edge portion of a filter medium, and the filter medium consists of at least one pocket (3, 4, 5, 6), with its opening turned towards the frame device, and the pocket shows substantially plane side walls. The filter device is especially characterized in that it is provided, at the frame device, with at least one gas guide means (7, 8) for said gas, designed such that said side walls of the filter medium are subject to a gas flow, substantially uniformly distributed along the extension of the filter medium from the frame device to the bottom of the pocket.

Description

A filter device with air guide
The present invention relates to a filter device, especially for filtering of gases like air, with a frame construction comprising a first frame and preferably a second frame, for sealing fixation of an edge portion of a filter medium to the frame device, the filter medium consisting of at least one pocket, with its opening turned towards the frame device, which pocket shows substantially plane side walls, preferably connected by approximate triangular gable portions.
For instance in the Swedish patent application SE 9701802- 2 there is disclosed a filter device of this type. The filter medium, made from fiber material like polyester, consists of a number of pockets, arranged side by side, with their openings turned to the frame device, which in this case consists of two frames between which the filter medium is fixed sealing. The pockets show substantially plane side walls, connected by approximate triangular gable portions. This filter device, and other ones, also comprising a filter medium in the form of pockets of the art just mentioned, show some drawbacks due to the uneven distribution of the flow of particle containing gas, usually air, that is fed to the filter device. Thus the particles are aggregated, at the outset, at the portion of the pockets, that is turned from the frames, and not until thereupon at the portions of the pockets, that re more close to the frames, especially the side walls, which contain most of the surface of the filter medium. An increased pressure drop over the filter medium arises due to the fact that the side walls of the pockets are pressed to each other such that the gas flow is prevented from passing. As the filter medium is deemed to be exhausted and in demand of replacement by measurement of the pressure drop over itself by a pressure gauge or differential pressure gauge this in reality occurs already when only about half of the surface of the filter medium is covered by particles, which means, that the filter medium has to be replaced before its filter surface has been utilized and that an unnecessary high cost for fan energy arises.
Thus the object of the present invention is to provide a filter device of the type mentioned introductorily, which admits the surface of the filter medium to be completely utilized, such that the cost for fan energy is limited.
According to the invention a filter device according to the invention is characterized in that the filter device is provided, at the frame device, with at least one gas guide means for said gas, designed such that said side walls of the filter medium are subject to a gas flow, substantially uniformly distributed along the extension of the filter medium from the frame device to the bottom of the pocket. In one advantageous embodiment of the filter device the gas guide means consists of two guide rails, provided at each pocket present, extending along the opening of the pocket, with their elongation substantially parallel to the side walls of the pocket, the guide rails being designed curved and such directed, that a gas flow fed is distributed uniformly along the side walls of the pocket from the frame device to the bottom of the pocket.
In one suitable embodiment of the filter device this comprises a first frame and a second frame for sealing fixation of an edge portion of the filter medium between said frames, when the second frame is pressed to the first frame, the guide rails being fixed to the first frame, turnably adjustable around their longitudinal axes. This design admits the guide rails being adjusted such that the gas flow fed is distributed in the desired fashion along the side walls of the pockets.
In order that the filter device according to the invention shall be utilized optimally, at least one fixation element should be provided to fix the mutual position of the bottoms of the pockets perpendicular to the longitudinal direction of the guide rails. Otherwise it can occur, that the mutual lateral position of the pockets is changed, subject to the gas flow fed, that is to say they "blow apart". Such fixation elements may be designed in different ways, e g in the form of several fixation wires, provided spaced between said gable portions.
The invention shall now be described more in detail, reference being made to the enclosed drawings, which schematically show an example of an embodiment of a filter device according to the invention.
In the figures: figure 1 shows a view from the feed side of a filter device, that is to say a view along the marks I - 1 in figure 2, figure 2 shows a view towards the cross section II- II in figure 1 , figure 3 shows a view towards a cross section in a filter device with a filter medium in the form of four pockets, with the flow pattern picture of a fresh filter medium, figure 4 shows a view of the object of figure 3, with the flow pattern picture of a partly exhausted, plugged filter medium.
Figure 5 shows a view of the object of figure 3, provided with fixation elements, while figure 6 shows the object of figure 5 in perspective. In the figures a first frame is marked by 1 and a second frame by 2. Between them there is pressed, sealing, the edge portion of a filter medium. The filter medium is designed with four pockets 3,4,5 and 6, which show relatively plane side walls and principally triangle formed gable surfaces. In the first frame there are, at the inlet opening of each pocket, tumably adjustable pairs of guide rails 7 and 8. These consist of longitudinal somewhat curved sheets of metal or plastic, mounted on longitudinal axes 12, which in turn are turnable in bearings at the top and at the foot at the first frame. They can be fastened with the aid of double nuts or other suitable means, in the desired rotation position. In figure 3 there is shown, how the gas flow 9 fed is distributed, according to the arrows 10 at a fresh filter medium and according to the arrows 1 1 at a partly exhausted, that is to say plugged, filter medium. In the figures 5 and 6 the filter device is shown, provided with fixation elements in the form of two lateral wires 12 and 13, provided at different distances from the gable portions of the pockets. The wires are fastened at fixation points, 14,15,16 and 17 at the wire 13 and at the wire 12 at corresponding fixation points. The fixation of the wires to the bottoms of the pockets, that is to say the fixation points, can be achieved e g by welding, if the pockets are manufactured from polymer material. Other methods for fixation are of course also possible. The frame device can be of different types, but shall comprise at least one stationary frame.

Claims

Patent claims
1.
A filter device, especially for filtering of gases like air, with a frame construction comprising a first frame (1) and preferably a second frame (2), for sealing fixation of an edge portion of a filter medium to the frame device, the filter medium consisting of at least one pocket (3,4,5,6), with its opening turned towards the frame device, which pocket shows substantially plane side walls, preferably connected by approximately triangular gable portions, characterized in that the filter device is provided, at the frame device, with at least one gas guide means (7,8) for said gas, designed such that said side walls of the filter medium are subject to a gas flow, substantially uniformly distributed along the extension of the filter medium from the frame device to the bottom of the pocket.
2.
A filter device according to claim 1 , characterized in that the gas guide means consists of two guide rails (7,8), provided at each pocket present, extending along the opening of the pocket, with their elongation substantially parallel to the side walls of the pocket, the guide rails being designed curved and such directed, that a gas flow (9) fed is distributed uniformly along the side walls of the pocket from the frame device to the bottom of the pocket
3.
A filter device according to claim 2, comprising a first frame (1) and a second frame (2) for sealing fixation of an edge portion of the filter medium between said frames, when the second frame is pressed to the first frame, characterized in that the guide rails (7,8) are fixed to the first frame (1) turnably adjustable around their longitudinal axes (12).
4.
A filter device acording to any of claims 1 to 3, characterized in that at least one fixation element (13,14) is provided to fix the mutual position of the bottoms of the pockets (3,4,5,6) perpendicular to the longitudinal direction of said guide rails.. A filter device according to claim 4, characterized in that the fixation element (13,14) consists of a longitudinal object, like a wire, welded to the bottoms of the pockets (3,4,5,6).
PCT/SE1998/002329 1997-12-16 1998-12-15 A filter device with air guide WO1999033544A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9704691-6 1997-12-16
SE9704691A SE9704691D0 (en) 1997-12-16 1997-12-16 Filter device with air inverter
SE9801113A SE511134C2 (en) 1997-12-16 1998-03-31 Filter device with air inverter
SE9801113-3 1998-03-31

Publications (1)

Publication Number Publication Date
WO1999033544A1 true WO1999033544A1 (en) 1999-07-08

Family

ID=26663160

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/002329 WO1999033544A1 (en) 1997-12-16 1998-12-15 A filter device with air guide

Country Status (2)

Country Link
SE (1) SE511134C2 (en)
WO (1) WO1999033544A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2027908A1 (en) 2007-07-27 2009-02-25 Mann+Hummel Gmbh Compact filter
WO2013185878A1 (en) * 2012-06-11 2013-12-19 Carl Freudenberg Kg Filter element with filter pockets
CN104147866A (en) * 2014-07-31 2014-11-19 安徽宁国中天环保设备有限公司 Dust removal filter bag net
CN104436901A (en) * 2014-11-11 2015-03-25 武汉钢铁(集团)公司 Method for finding damage position of dust collecting bag on pulse dust collector in online manner during back blowing
US10315147B2 (en) 2014-09-15 2019-06-11 Donaldson Company, Inc. Filter cartridges; air cleaner assemblies; housings; features; components; and, methods

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197099A (en) * 1976-11-30 1980-04-08 Lundberg Bo E I H Apparatus for mounting and holding filter bags and the like
US5320655A (en) * 1993-05-07 1994-06-14 Zenteco Ag Incineratable holding frame for filter bags, and method of making the frame

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197099A (en) * 1976-11-30 1980-04-08 Lundberg Bo E I H Apparatus for mounting and holding filter bags and the like
US5320655A (en) * 1993-05-07 1994-06-14 Zenteco Ag Incineratable holding frame for filter bags, and method of making the frame

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2027908A1 (en) 2007-07-27 2009-02-25 Mann+Hummel Gmbh Compact filter
US7892307B2 (en) 2007-07-27 2011-02-22 Mann + Hummel Gmbh Compact filter
WO2013185878A1 (en) * 2012-06-11 2013-12-19 Carl Freudenberg Kg Filter element with filter pockets
CN104363997A (en) * 2012-06-11 2015-02-18 卡尔·弗罗伊登贝格两合公司 Filter element with filter pockets
CN104363997B (en) * 2012-06-11 2017-03-08 卡尔·弗罗伊登贝格两合公司 Filter cell with filter bag
US9623355B2 (en) 2012-06-11 2017-04-18 Carl Freudenberg Kg Filter element with filter pockets
CN104147866A (en) * 2014-07-31 2014-11-19 安徽宁国中天环保设备有限公司 Dust removal filter bag net
US10315147B2 (en) 2014-09-15 2019-06-11 Donaldson Company, Inc. Filter cartridges; air cleaner assemblies; housings; features; components; and, methods
US11123672B2 (en) 2014-09-15 2021-09-21 Donaldson Company, Inc. Filter cartridges; air cleaner assemblies; housings; features; components; and, methods
US11772026B2 (en) 2014-09-15 2023-10-03 Donaldson Company, Inc. Filter cartridges; air cleaner assemblies; housings; features; components; and, methods
CN104436901A (en) * 2014-11-11 2015-03-25 武汉钢铁(集团)公司 Method for finding damage position of dust collecting bag on pulse dust collector in online manner during back blowing
CN104436901B (en) * 2014-11-11 2016-03-02 武汉钢铁(集团)公司 The method of dust-removal cloth-bag damage location on pulse dust collector is searched online during blowback

Also Published As

Publication number Publication date
SE9801113L (en) 1999-06-17
SE9801113D0 (en) 1998-03-31
SE511134C2 (en) 1999-08-09

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