EP1819413A1 - Filtervorrichtung - Google Patents

Filtervorrichtung

Info

Publication number
EP1819413A1
EP1819413A1 EP05803675A EP05803675A EP1819413A1 EP 1819413 A1 EP1819413 A1 EP 1819413A1 EP 05803675 A EP05803675 A EP 05803675A EP 05803675 A EP05803675 A EP 05803675A EP 1819413 A1 EP1819413 A1 EP 1819413A1
Authority
EP
European Patent Office
Prior art keywords
filter
flow
channel
rotating
wall
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP05803675A
Other languages
English (en)
French (fr)
Other versions
EP1819413A4 (de
Inventor
Kimmo Heinonen
Aimo Taipale
Matti Niemeläinen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valtion Teknillinen Tutkimuskeskus
Original Assignee
Valtion Teknillinen Tutkimuskeskus
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 Valtion Teknillinen Tutkimuskeskus filed Critical Valtion Teknillinen Tutkimuskeskus
Publication of EP1819413A1 publication Critical patent/EP1819413A1/de
Publication of EP1819413A4 publication Critical patent/EP1819413A4/de
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0052Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation
    • B01D46/0056Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation with rotational movement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66Regeneration of the filtering material or filter elements inside the filter
    • B01D46/74Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
    • B01D46/78Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving centrifugal forces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66Regeneration of the filtering material or filter elements inside the filter
    • B01D46/79Regeneration of the filtering material or filter elements inside the filter by liquid process
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2273/00Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/30Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan

Definitions

  • the invention relates to a filter apparatus according to the preamble of the appended claim 1.
  • the aim is to remove particles from airflows.
  • the collecting efficiency of filters has been aimed to be improved in various manners.
  • the fibre size of the filter material has been decreased and the density has been increased in order to improve collecting efficiency.
  • a result of this has been an increase in the flow resistance.
  • the filter apparatus according to the invention is primarily characterized in what will be presented in the characterizing part of the independent claim 1.
  • the other, dependent claims will present some preferred embodiments of the invention.
  • the filter structure comprises a rotating filter, which has a diameter that is substantially larger than the diameter of the flow route following it.
  • the filter is advantageously a fabric filter or a membrane filter.
  • the rotating filter is followed by a wall, which comprises a flow opening.
  • the diameter of the channel continuing after the rotating filter is smaller than the diameter of the filter.
  • the rotating filter is arranged in the immediate vicinity of the wall following it.
  • the filter and the wall come together in a tight manner, for example, by the effect of a flow created by a centrifugal force, in which case the travel of particles to the side of the cleaned flow is substantially prevented.
  • An advantage of the invention is that by changing the rotating speed, it is possible to move on a desired pressure difference area without changing the structure of the filter. In addition, in principle it is possible to control the collecting efficiency of the filter continuously as necessary by changing the rotating speed of the filter.
  • the structure according to the invention has several advantages.
  • a significant advantage is the good particle filtering capability reached by means of a simple structure.
  • Another significant advantage is the reliable tightening of the rotating filter due to the centrifugal effect.
  • the filter has a kind of a self-cleaning feature due to the centrifugal force.
  • the efficiency of the filter is intensified with an electric charging.
  • the rotation of the filter creates a charging of the filter.
  • Fig. 1 shows an embodiment according to the invention
  • Fig. 2 shows a cross-section of an embodiment according to Fig.
  • Fig. 3 shows a cross-section of an embodiment according to Fig.
  • Fig. 4 shows the relationship between the areas of the filter and the flow opening following it
  • Figs 5 to 9 show some other embodiments of the invention.
  • Fig. 10 shows some measurement results.
  • the figures only show the details necessary for understanding the invention.
  • the structures and details that are not necessary for understanding the invention, but are obvious for anyone skilled in the art, have been omitted from the figures in order to emphasize the characteristics of the invention.
  • Fig. 1 shows a rotating filter 4 arranged in a channel 1 ,2 according to the invention.
  • the rotation axis of the filter 4 is parallel to the flow direction F of the medium to be cleaned coming to the filter 4, such as, for example, gas or liquid.
  • the rotating motion of the filter 4 is created by means of a suitable actuator 5, such as, for example, an electric motor.
  • the filter 4 is attached to the rotating apparatus in a suitable manner, such as, for example, by screws, bolts, pins, lock pins, adhesive, and/or adhesive label. In some applications an adhesive attachment enables the fast and easy changeability of the filter 4.
  • the part 1 of the channel preceding the filter 4 seen in the flow direction F in the example of Fig. 1 has a diameter that is substantially equal to the part 2 of the channel after the filter.
  • the diameter of the rotating filter 4 is equal or smaller than the diameter of the channel 1 ,2.
  • a separating wall 3 has been arranged in connection with the channel 1 , 2, which wall is placed immediately after the filter 4 in the flow direction F.
  • the opening O in the separating wall 3 is later called the flow opening.
  • Fig. 2 shows a cross section of the embodiment of Fig. 1 seen at point A-A towards the filter.
  • the filter 4 covers the entire flow opening O in the separating wall 3 (the borders of the opening are marked with a dashed line in the figure).
  • Fig. 3 shows a cross section of the embodiment of Fig. 1 seen at point B-B towards the filter.
  • the rotation direction of the filter 4 is not significant from the point of view of the basic idea of the invention. One possible direction is marked as the rotation direction in Figs. 2 and 3.
  • Fig. 4 shows, in principle, the mutual location of the filter 4 and the opening formed by the flow opening O following it, i.e. the wall 3 in an embodiment.
  • the area A1 towards the wall 3 of the filter 1 is larger than the area A2 of the flow opening O following it.
  • the filter 4 covers the entire flow opening O, i.e. the periphery of the filter 4 defines within its limits the entire opening in the wall 3.
  • the basic idea of the operation of the filter apparatus according to the invention is that the medium flow F containing impurities is directed to a rotating fabric filter 4, where the impurities travel partly to the periphery and further out of the filter.
  • the travel of impurities towards the periphery of the filter 4 is caused by, inter alia, a centrifugal force.
  • the periphery of the filter 4 in accordance with the invention further away from the rotation axis than the edge of the flow opening O, the impurities detaching from the periphery of the filter do not go back to the purified flow.
  • the progress of the impurities detaching from the periphery of the filter is limited by a wall 3.
  • Fig. 5 shows the structure of a filter apparatus, wherein the rotating filter according to an embodiment of the invention is placed in the junction of a wide channel 1 and a narrow channel 2.
  • the diameter of the rotating filter 4 is as large or smaller than the diameter of the first channel 1 in the flow direction F and larger than the diameter of the second, narrower channel 2 in the flow direction.
  • the filter 4 is placed in such a manner that it is in the immediate vicinity of the wall 3 forming to the junction of the channels 1 , 2.
  • the cross-sectional area of the flow opening O corresponds substantially to the cross- sectional area of the channel 2.
  • Fig. 6 shows a structure, wherein the rotating filter according to an embodiment of the invention is placed before the channel 2.
  • the cross-sectional area of the rotating filter 4 is larger than the diameter of the channel 2, the opening of which channel forms the flow opening O.
  • the filter 4 is placed in the flow direction F in such a manner that it is in the immediate vicinity of the wall 3 forming around the channel 2.
  • the channel 2 is formed by a pipe, which does not comprise the actual wall 3 shown in figure 6.
  • the filter 4 is dimensioned in such a manner, that the periphery is outside the edges of the channel 2 (pipe).
  • Fig. 7 shows an embodiment of the invention, wherein a rotating filter 4 is arranged to the channel 1 , 2 in accordance with the invention.
  • the part 1 of the channel preceding the filter 4 has a diameter that is substantially equal to the part 2 of the channel after the filter.
  • the diameter of the rotating filter 4 is larger than the diameter of channel 1 , 2. Because of this, an expansion structure is arranged in connection with the channel 1 , 2, which structure forms a separating wall 3 on the side of the channel 2.
  • the filter 4 is placed immediately on the front side of the separating wall 3 in the flow direction F.
  • Fig. 8 shows a structure, wherein the rotating filter according to an embodiment of the invention is placed before the channel 2.
  • the cross- sectional area of the rotating filter 4 is larger than the diameter of the channel 2, the opening of which channel forms the flow opening O.
  • the filter 4 is placed in the flow direction F in such a manner that it is in the immediate vicinity of the wall 3 forming around the channel 2.
  • the diameter of the channel 1 can also be different than the diameter of the channel 2.
  • the channel 1 could have a diameter that is larger than the part of the channel 2 after the filter.
  • Fig. 9 shows yet another embodiment of the invention, wherein the filter structure is connected to a blower 6.
  • the filter 4 is rotated over 1000 revolutions per minute, such as, for example, 1400 to 3000 rpm when the medium is a gaseous body.
  • the resistance caused by the medium can be relatively strong, in which case the rotating speed can be slower.
  • Fig. 10 shows some measurement results. It is an application, wherein liquid particles have been in the medium, which particles have been aimed to be removed from the flow.
  • the filtering has been performed with a conventional filter apparatus and with a filter apparatus according to the invention.
  • the conventional filter does not remove other than the largest particles form the medium flow.
  • the filter apparatus according to the invention removes efficiently even particles of the size 1 ⁇ m, and the filtering efficiency increases when the particle size increases.
  • the separating capability of a rotating filter 4 is intensified with an electrical charging.
  • a charging of the filter is achieved when the filter rotates and sweeps the separating wall.
  • the particles are charged with a suitable charger before the filter 4, in which case the separating capability of the filter is intensified significantly.
  • the filter apparatus comprises a cleaning system of the filter 4 as well.
  • the cleaner system can be implemented by, for example, arranging the input of a cleaner, such as, for example a liquid, in the filter apparatus before the filter 4 in the flow direction.
  • a cleaner such as, for example a liquid
  • the cleaner travels with the flow to the filter 4.
  • the cleaner travels by the effect of a centrifugal force to the periphery of the filter and further away from the filter.
  • the cleaner advantageously moves the impurities with it.
  • the filter apparatus according to the invention can be used in various targets of use. It can be, for example, used to remove dry particles and/or liquid drops from a gas flow, such as air.
  • the material and structure of the filter 4 is advantageous to be selected as suitable for the target of use.
  • the filter 4 can be manufactured, for example, of fibre material or some other material with corresponding properties, such as, for example, a membrane.
  • an impurity collecting unit 7 has been formed in connection with the wall 3.
  • the impurities that are removed from the filter due to the effect of a centrifugal force collect in the collecting unit 7 in question.
  • the collecting unit 7 is a trough-like structure circling the channel 1 , from where the impurities in an embodiment can be further directed away.
  • the collecting unit 7 is a cavity, whose opening is in the interface of the wall and the channel.
  • the size and shape of the collecting unit 7 may vary significantly. A matter affecting the implementation of the collecting unit 7 is the amount and quality of impurities.
  • the collecting unit 7 may comprise, for example, structures relating to water atomization cleaning.
  • one flow opening O formed in the wall 3 has been used.
  • the invention does not depend on the number or form of the openings O formed in the wall 3.
  • the wall 3 comprises structures, by means of which the rotating apparatus 5 of the filter 4 is supported.
  • two or four flow openings O may be formed in the wall 3.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Centrifugal Separators (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
EP05803675A 2004-11-11 2005-11-02 Filtervorrichtung Withdrawn EP1819413A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20045436A FI122194B (fi) 2004-11-11 2004-11-11 Suodatinlaitteisto
PCT/FI2005/050388 WO2006051161A1 (en) 2004-11-11 2005-11-02 A filter apparatus

Publications (2)

Publication Number Publication Date
EP1819413A1 true EP1819413A1 (de) 2007-08-22
EP1819413A4 EP1819413A4 (de) 2010-07-21

Family

ID=33515319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05803675A Withdrawn EP1819413A4 (de) 2004-11-11 2005-11-02 Filtervorrichtung

Country Status (3)

Country Link
EP (1) EP1819413A4 (de)
FI (1) FI122194B (de)
WO (1) WO2006051161A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI122583B (fi) * 2009-07-14 2012-03-30 Jeven Ab Ilmansuodatusjärjestely ja ilmasuodin
CN110523160A (zh) * 2019-08-27 2019-12-03 安徽宏源铁塔有限公司 镀锌车间锌烟塔自洁式风道

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2505125A1 (de) * 1975-02-07 1976-08-26 Hoccom Developments Ltd Abscheider

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU32828A1 (de) * 1953-04-24
US4006938A (en) * 1973-03-19 1977-02-08 Societe Anonyme Des Establissements Neu Method and apparatus for separating and distributing fibrous materials
US5888261A (en) * 1995-08-03 1999-03-30 Fortune; William S. Rotating element fume collection apparatus
GB9723029D0 (en) * 1997-11-01 1998-01-07 Sharpe John E E Improvements to fluid filtration
DE19838265A1 (de) * 1998-08-22 2000-02-24 Norbert Marek Filtervorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2505125A1 (de) * 1975-02-07 1976-08-26 Hoccom Developments Ltd Abscheider

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006051161A1 *

Also Published As

Publication number Publication date
FI122194B (fi) 2011-10-14
EP1819413A4 (de) 2010-07-21
WO2006051161A1 (en) 2006-05-18
FI20045436A (fi) 2006-05-12
FI20045436A0 (fi) 2004-11-11

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