WO2012030282A1 - Movable clean-blowing device for a filter - Google Patents

Movable clean-blowing device for a filter Download PDF

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Publication number
WO2012030282A1
WO2012030282A1 PCT/SE2011/051032 SE2011051032W WO2012030282A1 WO 2012030282 A1 WO2012030282 A1 WO 2012030282A1 SE 2011051032 W SE2011051032 W SE 2011051032W WO 2012030282 A1 WO2012030282 A1 WO 2012030282A1
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WO
WIPO (PCT)
Prior art keywords
filter
clean
blowing device
filter cloth
outside
Prior art date
Application number
PCT/SE2011/051032
Other languages
French (fr)
Inventor
Åke Ralvert
Original Assignee
Veolia Water Solutions & Technologies Support
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 Veolia Water Solutions & Technologies Support filed Critical Veolia Water Solutions & Technologies Support
Publication of WO2012030282A1 publication Critical patent/WO2012030282A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
    • B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles

Definitions

  • the present invention relates to a clean-blowing device for filters consisting of at least one filter element, the outside of which is covered by a filter cloth, wherein the clean-blowing device is arranged on the outside of said filter and is directed perpendicularly to the outside of the filter cloth.
  • filters for cleaning liquid flows. These filters may be designed in different ways, e.g., as drum or disc filters.
  • a well-known problem with such filters is that the filter cloth clogs up by the sludge that sticks to the cloth during the filtering process, since this sludge sooner or later forms an impermeable sludge cake on the inside of the filter cloth.
  • This problem is solved by various flushing and/or clean-blowing de- vices, which flush or blow the filter cloth clean in a direction towards the centre of the filter, so called back-washing.
  • the flushing and/or clean-blowing device is in most cases a nozzle, which is directed towards the filter cloth and which sprays fluid or compressed air.
  • a drum filter with clean-blowing devices is disclosed in the Swedish patent No. SE-305 122.
  • a compressed-air source is arranged, which is connected to nozzles by means of a piping system. These nozzles are directed towards the surface of the drum, i.e. the filter cloth, and blow air such that the sludge cake that has formed on the inside of the filter cloth falls down to subsequently be led away from the filter.
  • a problem with this common solution is that the nozzles need to be arranged at a certain distance from the outside of the filter element, and hence the filter cloth, since the outside is frequently somewhat profiled and not completely smooth. This may be due to the filter cloth not being continuous around the filter element, but consisting of a number of portions that have been joined together by means of, e.g., bars mounted on the outside of the filter element. Another reason that the outside of the filter element may be profiled is that the filter element is reinforced, e.g., by means of reinforcing beams, mounted spaced apart on the outside of the filter element.
  • the object of the present invention is to eliminate, or at least reduce, the above-mentioned problem, and to provide a clean-blowing device, whose distance to the filter cloth is adjustable by the clean-blowing device being movable towards or from the surface of the filter cloth.
  • a clean-blowing device for a filter consisting of at least one filter element, the outside of which is covered by a filter cloth, wherein the clean- blowing device is arranged on the outside of said filter and is directed perpendicularly to the outside of the filter cloth, characterised in that the clean- blowing device includes a compressed-air hood, which is movable towards and/or from the filter cloth in a direction of movement which is perpendicular to said filter cloth.
  • the distance between the clean-blowing device and the filter cloth is adjusted such that the clean-blowing device is continu- ously at the same distance, or, if so desired, at another distance, from the filter cloth and possible profiles mounted on the outside of it.
  • An adjustable distance results in a possibility to adjust the clean-blowing pressure to how much the current sludge clogs the filter cloth. This may be done either locally, e.g., in more heavily loaded areas of the filter cloth, or for the entire filter cloth if, for instance, the sludge is easier or more difficult to handle than average.
  • the filter may be a drum filter, which is a common type of filter within the areas of application described below.
  • the direction of movement of the clean-blowing device is radial from the centre axis of the drum filter, resulting in that the device may be raised and lowered, respectively, when it passes a possible profile which is mounted on the outside of the filter cloth of the filter element and which projects from it in a radial direction.
  • the filter may also be a disc filter, which is another common type of filter within the areas of application described below.
  • the direction of movement of the clean-blowing device is axial along the centre axis of the disc filter, resulting in that the device may be raised and lowered, respectively, when it passes a possible profile, which is mounted on the outside of the filter cloth of the filter element and which projects from it in an axial direction.
  • the clean-blowing device is movable in an axial direction along the centre axis of the disc filter from one side of a filter element to the other side of the same filter element. In this manner, both sides of a filter element may be blown clean by the same device.
  • the clean-blowing device is also movable in an axial direction along the centre axis of the disc filter from one filter element to another, adjacent filter element. Thus, all filter elements in one disc filter may be blown clean by the same device.
  • the clean-blowing device is automatically moved in response to the result of a reading made by at least one sensor.
  • the sensor may be chosen from the group consisting of optical, electrical and/or mechanical sensors.
  • the clean-blowing device is arranged on a frame, which is located outside the filter cloth of said filter element. Maintenance and movement of the clean-blowing device is facilitated when it is mounted on a separate frame arranged outside the filter cloth.
  • the frame is moved such that the clean-blowing device maintains its perpendicular orientation towards the filter cloth during the entire movement.
  • a perpendicular orientation of the compressed-air jet in relation to the filter cloth ensures the best possible effect of the clean-blowing pressure, since the entire compressed-air jet is located the best distance from the filter cloth.
  • Fig. 1 shows a schematic perspective view of a drum filter with a clean- blowing device according to an embodiment of the present invention.
  • Fig. 2 shows a detailed close-up view of the drum filter with a clean- blowing device of Fig. 1.
  • Fig. 3 shows a schematic perspective view of a disc filter with a clean- blowing device according to an embodiment of the present invention.
  • Fig. 4 is a perspective view of a clean-blowing device and a frame according to an embodiment of the present invention.
  • the present invention relates to a clean-blowing device 1 for a drum filter 2 and/or a disc filter 3 comprising at least one filter element 8. Since drum filters, as well as disc filters are well known, it is here assumed that the skilled person is well versed with the function and construction of these types of filters, and therefore, this will not be described in any further detail.
  • FIGs 2 and 3 the invention is shown in connection with use with a drum filter 2.
  • a common drum filter 2 comprises a drum 4, the periphery of which is covered by a filter cloth 5.
  • This periphery may be somewhat profiled, e.g., due to the filter cloth 5 not being continuous around the drum 4, but made up of a number of portions that are joined together by means of bars or reinforcement beams 6, which are mounted on the outside of the drum 4, in the same direction as the centre axis thereof.
  • the clean-blowing device 1 is arranged on the outside of the drum 4, i.e. beyond the periphery of the drum 4 as seen from the centre axis.
  • the clean-blowing device 1 of the invention comprises a compressed- air hood having an inlet 10, as shown in Fig. 4, for compressed air, and designed with a tapering outlet 1 , which is directed perpendicularly to the outside of the filter cloth 5, and, hence, to the centre axis of the drum filter 2.
  • the clean-blowing device 1 is mounted on a frame 7, which is movably attached (not shown) and located outside the filter cloth 5 of said filter element 8.
  • the frame 7, and, hence, the clean-blowing device 1 are moved in a direction of movement which is perpendicular to the filter cloth 5, preferably in a radial direction, from or towards the filter cloth 5.
  • the movement is performed such that the clean-blowing device 1 maintains its perpendicular ori- entation in relation to the filter cloth 5 during the entire movement.
  • the movement of the frame 7 is performed by pneumatic, hydraulic or mechanical devices. This movement is performed automatically mechanically or as a result of a sensor reading made by at least one sensor, wherein said sensor may be chosen from the group consisting of optical, electrical and/or mechanical sensors, which read the profiling present on the surface of the drum 4, and raises and lowers, respectively, the clean-blowing device 1 in a radial direction, such that the clean-blowing device 1 is able to pass at the same distance from the surface of the drum 4, regardless of the design and surface structure.
  • a mechanical device may include a slide-like means 12, which suitably is mounted at each end of the clean-blowing device 1.
  • the means 12 extends along the edge of the drum 4 and is at a bar or reinforcement beam 6 brought in contact with a preferably inclined surface 13 at the end of the beam 6 or on a separate guide means 14 to raise the clean- blowing device 1 over the beam 6.
  • FIG. 4 the invention is shown in connection with use with a disc filter
  • a common disc filter 3 usually includes several filter elements 8, i.e. a hollow disc, which in known manner is covered by a filter cloth 5 (not shown in detail) on both sides. Such discs may be arranged one after the other along a common centre axis.
  • the surface of the filter cloth 5, or the corresponding area outside the peripheral edge 9 of the disc may be somewhat profiled, e.g. due to the filter cloth 5 not being continuous, but made up of a number of portions that are joined together by means of, e.g., bars or reinforcement beams 6, which are mounted on the outside of the disc 9, in a radial direction from the common centre axis.
  • the clean-blowing device 1 is arranged on the outside of the disc, i.e. aligned with the area outside the peripheral edge 9 of the disc, and at least partially inside the periphery of the disc in the radial direction.
  • the clean- blowing device 1 of the invention is made up of a compressed-air hood, which is directed perpendicularly to the outside of the filter cloth 5, and, hence, also aligned with the common centre axis of the disc filter 3.
  • the clean-blowing device 1 is mounted on a frame 7, which is located beyond the filter cloth 5 of said filter element 8.
  • the frame 7, and, hence, also the clean-blowing device 1 is moved in a direction of movement which is essentially perpendicular to the filter cloth 5, preferably in the same direction as the centre line, from or towards the filter cloth 5.
  • the movement is performed such that the clean-blowing device 1 maintains its perpendicular orientation in relation to the filter cloth 5 during the entire movement.
  • the movement of the frame 7 is performed by pneumatic, hydraulic or mechanical devices. This movement is performed automatically as a result of a sensor reading done by at least one sensor, wherein said sensor may be chosen from the group consisting of optical, electrical and/or mechanical sensors, which read a profiling present on the surface of the filter cloth 5, and raises and lowers, respectively, the clean-blowing device 1 , in an axial direction, such that the clean-blowing device 1 may pass at the same distance from the surface, regardless of possible projections or recesses.
  • the clean-blowing device 1 may further be moved in a direction along the centre axis, from one side of a filter element 8 to the other side of the same filter element 8, to clean both sides of the same filter element 8. It may also be moved in a direction along the centre axis of the filter, from one filter element 8 to another, adjacent filter element 8, for cleaning all filter elements 8 within the disc filter 3.
  • the clean-blowing device 1 of the invention is a compressed-air hood, i.e. an elongated profile including a compressed-air outlet along the entire profile, or at least most of the profile.
  • the compressed-air hood is, as described above, arranged in an axial direction along the centre axis of a drum filter 2, and in a radial direction from the centre axis of a disc filter 3.
  • the compressed-air hood may be replaced by a multitude of independent blowing nozzles.
  • the frame, and hence the clean-blowing device may be moved in several directions in addition to the axial and radial directions.
  • the compressed-air hood may be directed towards the filter cloth at another angle than perpendicular.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Cleaning In General (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A clean-blowing device (1) for a filter consisting of at least one filter element (8), the outside of which is covered by a filter cloth (5), wherein the clean-blowing device (1) is arranged on the outside of said filter and directed perpendicularly to the outside of the filter cloth (5). The clean-blowing device (1) includes a compressed-air hood, which is movable towards and/or from the filter cloth (5) in a direction of movement which is perpendicular to said filter cloth (5).

Description

Movable clean-blowing device for a filter
Technical Field of the Invention
The present invention relates to a clean-blowing device for filters consisting of at least one filter element, the outside of which is covered by a filter cloth, wherein the clean-blowing device is arranged on the outside of said filter and is directed perpendicularly to the outside of the filter cloth.
Background Art
It is well known to use different kinds of filters for cleaning liquid flows. These filters may be designed in different ways, e.g., as drum or disc filters. A well-known problem with such filters is that the filter cloth clogs up by the sludge that sticks to the cloth during the filtering process, since this sludge sooner or later forms an impermeable sludge cake on the inside of the filter cloth. This problem is solved by various flushing and/or clean-blowing de- vices, which flush or blow the filter cloth clean in a direction towards the centre of the filter, so called back-washing. The flushing and/or clean-blowing device is in most cases a nozzle, which is directed towards the filter cloth and which sprays fluid or compressed air.
A drum filter with clean-blowing devices is disclosed in the Swedish patent No. SE-305 122. Above the drum, a compressed-air source is arranged, which is connected to nozzles by means of a piping system. These nozzles are directed towards the surface of the drum, i.e. the filter cloth, and blow air such that the sludge cake that has formed on the inside of the filter cloth falls down to subsequently be led away from the filter.
A problem with this common solution is that the nozzles need to be arranged at a certain distance from the outside of the filter element, and hence the filter cloth, since the outside is frequently somewhat profiled and not completely smooth. This may be due to the filter cloth not being continuous around the filter element, but consisting of a number of portions that have been joined together by means of, e.g., bars mounted on the outside of the filter element. Another reason that the outside of the filter element may be profiled is that the filter element is reinforced, e.g., by means of reinforcing beams, mounted spaced apart on the outside of the filter element. The longer the distance between the_cJearbblowing device and the filter cloth, the higher the required flushing and/or clean-blowing pressure, and additionally, this distance results in that the pressure needs to be adjusted if the cleaning power is to be adapted to how much the current sludge clogs the filter cloth. Summary of the Invention
The object of the present invention is to eliminate, or at least reduce, the above-mentioned problem, and to provide a clean-blowing device, whose distance to the filter cloth is adjustable by the clean-blowing device being movable towards or from the surface of the filter cloth.
This object is achieved, according to a first aspect of the invention, by providing a clean-blowing device for a filter consisting of at least one filter element, the outside of which is covered by a filter cloth, wherein the clean- blowing device is arranged on the outside of said filter and is directed perpendicularly to the outside of the filter cloth, characterised in that the clean- blowing device includes a compressed-air hood, which is movable towards and/or from the filter cloth in a direction of movement which is perpendicular to said filter cloth.
With this arrangement, the distance between the clean-blowing device and the filter cloth is adjusted such that the clean-blowing device is continu- ously at the same distance, or, if so desired, at another distance, from the filter cloth and possible profiles mounted on the outside of it. An adjustable distance results in a possibility to adjust the clean-blowing pressure to how much the current sludge clogs the filter cloth. This may be done either locally, e.g., in more heavily loaded areas of the filter cloth, or for the entire filter cloth if, for instance, the sludge is easier or more difficult to handle than average.
The filter may be a drum filter, which is a common type of filter within the areas of application described below.
The direction of movement of the clean-blowing device is radial from the centre axis of the drum filter, resulting in that the device may be raised and lowered, respectively, when it passes a possible profile which is mounted on the outside of the filter cloth of the filter element and which projects from it in a radial direction.
The filter may also be a disc filter, which is another common type of filter within the areas of application described below.
The direction of movement of the clean-blowing device is axial along the centre axis of the disc filter, resulting in that the device may be raised and lowered, respectively, when it passes a possible profile, which is mounted on the outside of the filter cloth of the filter element and which projects from it in an axial direction.
The clean-blowing device is movable in an axial direction along the centre axis of the disc filter from one side of a filter element to the other side of the same filter element. In this manner, both sides of a filter element may be blown clean by the same device.
The clean-blowing device is also movable in an axial direction along the centre axis of the disc filter from one filter element to another, adjacent filter element. Thus, all filter elements in one disc filter may be blown clean by the same device.
The clean-blowing device is automatically moved in response to the result of a reading made by at least one sensor.
The sensor may be chosen from the group consisting of optical, electrical and/or mechanical sensors.
The clean-blowing device is arranged on a frame, which is located outside the filter cloth of said filter element. Maintenance and movement of the clean-blowing device is facilitated when it is mounted on a separate frame arranged outside the filter cloth.
The frame is moved such that the clean-blowing device maintains its perpendicular orientation towards the filter cloth during the entire movement. A perpendicular orientation of the compressed-air jet in relation to the filter cloth ensures the best possible effect of the clean-blowing pressure, since the entire compressed-air jet is located the best distance from the filter cloth.
The features described above with reference to various examples of embodiments may be present either separately or in combination.
Brief Description of the Drawings
The invention will be described in more detail in the following, with reference to the appended drawings, which by way of example show a currently preferred embodiment of the invention.
Fig. 1 shows a schematic perspective view of a drum filter with a clean- blowing device according to an embodiment of the present invention.
Fig. 2 shows a detailed close-up view of the drum filter with a clean- blowing device of Fig. 1.
Fig. 3 shows a schematic perspective view of a disc filter with a clean- blowing device according to an embodiment of the present invention. Fig. 4 is a perspective view of a clean-blowing device and a frame according to an embodiment of the present invention.
Detailed Description of Preferred Embodiments of the Invention
The present invention relates to a clean-blowing device 1 for a drum filter 2 and/or a disc filter 3 comprising at least one filter element 8. Since drum filters, as well as disc filters are well known, it is here assumed that the skilled person is well versed with the function and construction of these types of filters, and therefore, this will not be described in any further detail.
In Figs 2 and 3, the invention is shown in connection with use with a drum filter 2.
A common drum filter 2 comprises a drum 4, the periphery of which is covered by a filter cloth 5. This periphery may be somewhat profiled, e.g., due to the filter cloth 5 not being continuous around the drum 4, but made up of a number of portions that are joined together by means of bars or reinforcement beams 6, which are mounted on the outside of the drum 4, in the same direction as the centre axis thereof.
The clean-blowing device 1 is arranged on the outside of the drum 4, i.e. beyond the periphery of the drum 4 as seen from the centre axis.
The clean-blowing device 1 of the invention comprises a compressed- air hood having an inlet 10, as shown in Fig. 4, for compressed air, and designed with a tapering outlet 1 , which is directed perpendicularly to the outside of the filter cloth 5, and, hence, to the centre axis of the drum filter 2.
The clean-blowing device 1 is mounted on a frame 7, which is movably attached (not shown) and located outside the filter cloth 5 of said filter element 8. The frame 7, and, hence, the clean-blowing device 1 , are moved in a direction of movement which is perpendicular to the filter cloth 5, preferably in a radial direction, from or towards the filter cloth 5. The movement is performed such that the clean-blowing device 1 maintains its perpendicular ori- entation in relation to the filter cloth 5 during the entire movement.
The movement of the frame 7 is performed by pneumatic, hydraulic or mechanical devices. This movement is performed automatically mechanically or as a result of a sensor reading made by at least one sensor, wherein said sensor may be chosen from the group consisting of optical, electrical and/or mechanical sensors, which read the profiling present on the surface of the drum 4, and raises and lowers, respectively, the clean-blowing device 1 in a radial direction, such that the clean-blowing device 1 is able to pass at the same distance from the surface of the drum 4, regardless of the design and surface structure. For instance, a mechanical device may include a slide-like means 12, which suitably is mounted at each end of the clean-blowing device 1. The means 12 extends along the edge of the drum 4 and is at a bar or reinforcement beam 6 brought in contact with a preferably inclined surface 13 at the end of the beam 6 or on a separate guide means 14 to raise the clean- blowing device 1 over the beam 6.
In Fig. 4, the invention is shown in connection with use with a disc filter
3.
A common disc filter 3 usually includes several filter elements 8, i.e. a hollow disc, which in known manner is covered by a filter cloth 5 (not shown in detail) on both sides. Such discs may be arranged one after the other along a common centre axis. The surface of the filter cloth 5, or the corresponding area outside the peripheral edge 9 of the disc, may be somewhat profiled, e.g. due to the filter cloth 5 not being continuous, but made up of a number of portions that are joined together by means of, e.g., bars or reinforcement beams 6, which are mounted on the outside of the disc 9, in a radial direction from the common centre axis.
The clean-blowing device 1 is arranged on the outside of the disc, i.e. aligned with the area outside the peripheral edge 9 of the disc, and at least partially inside the periphery of the disc in the radial direction. The clean- blowing device 1 of the invention is made up of a compressed-air hood, which is directed perpendicularly to the outside of the filter cloth 5, and, hence, also aligned with the common centre axis of the disc filter 3.
The clean-blowing device 1 is mounted on a frame 7, which is located beyond the filter cloth 5 of said filter element 8. The frame 7, and, hence, also the clean-blowing device 1 , is moved in a direction of movement which is essentially perpendicular to the filter cloth 5, preferably in the same direction as the centre line, from or towards the filter cloth 5. The movement is performed such that the clean-blowing device 1 maintains its perpendicular orientation in relation to the filter cloth 5 during the entire movement.
The movement of the frame 7 is performed by pneumatic, hydraulic or mechanical devices. This movement is performed automatically as a result of a sensor reading done by at least one sensor, wherein said sensor may be chosen from the group consisting of optical, electrical and/or mechanical sensors, which read a profiling present on the surface of the filter cloth 5, and raises and lowers, respectively, the clean-blowing device 1 , in an axial direction, such that the clean-blowing device 1 may pass at the same distance from the surface, regardless of possible projections or recesses.
The clean-blowing device 1 may further be moved in a direction along the centre axis, from one side of a filter element 8 to the other side of the same filter element 8, to clean both sides of the same filter element 8. It may also be moved in a direction along the centre axis of the filter, from one filter element 8 to another, adjacent filter element 8, for cleaning all filter elements 8 within the disc filter 3.
Regardless of whether it is a drum filter 2 or a disc filter 3 that is used, the clean-blowing device 1 of the invention is a compressed-air hood, i.e. an elongated profile including a compressed-air outlet along the entire profile, or at least most of the profile. The compressed-air hood is, as described above, arranged in an axial direction along the centre axis of a drum filter 2, and in a radial direction from the centre axis of a disc filter 3.
It will be appreciated that numerous modifications of the embodiment described above are possible within the scope of the invention, as defined in the following claims. For instance, the compressed-air hood may be replaced by a multitude of independent blowing nozzles. Additionally, the frame, and hence the clean-blowing device, may be moved in several directions in addition to the axial and radial directions. Further, the compressed-air hood may be directed towards the filter cloth at another angle than perpendicular.

Claims

1. A clean-blowing device (1) for a filter consisting of at least one filter element (8), the outside of which is covered by a filter cloth (5), wherein the clean-blowing device (1) is arranged on the outside of said filter and is directed perpendicularly to the outside of the filter cloth (5), c h a r a c t e r i s e d i n that the clean-blowing device (1) includes a compressed-air hood, which is movable towards and/or from the filter cloth (5) in a direction of movement which is perpendicular to said filter cloth (5).
2. A device as claimed in claim 1 , wherein said filter is a drum filter (2).
3. A device as claimed in claim 2, wherein the direction of movement of said clean-blowing device (1) is radial from the centre axis of the filter.
4. A device as claimed in claim 1 , wherein said filter is a disc filter (3).
5. A device as claimed in claim 4, wherein the direction of movement of the clean-blowing device (1) is axial along the centre axis of the filter.
6. A device as claimed in claim 4 or 5, wherein the clean-blowing device (1) is movable in an axial direction along the centre axis of the filter from one side of a filter element (8) to the other side of the filter element (8).
7. A device as claimed in claim 5 or 6, wherein the clean-blowing device (1) is movable in an axial direction along the centre axis of the filter from one filter element (8) to another adjacent filter element (8).
8. A device as claimed in any one of claims 1-7, wherein the clean-blowing device (1) is moved automatically in response to the result of a reading made by at least one sensor.
9. A device as claimed in claim 8, wherein the sensor is chosen from the group consisting of optical, electrical and/or mechanical sensors.
10. A device as claimed in any one of claims 1-9, wherein the clean-blowing device (1) is arranged on a frame (7), which is located outside the filter cloth
(5) of said filter element (8).
11. A device as claimed in claim 10, wherein said frame (7) is movable by pneumatic, hydraulic or mechanical devices.
12. A device as claimed in claim 10 or 11 , wherein the frame (7) is moved such that the clean-blowing device (1) maintains its perpendicular direction to the filter cloth (5) during the entire movement.
PCT/SE2011/051032 2010-08-30 2011-08-26 Movable clean-blowing device for a filter WO2012030282A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1050882-8 2010-08-30
SE1050882A SE535158C2 (en) 2010-08-30 2010-08-30 Movable filter blower for filters

Publications (1)

Publication Number Publication Date
WO2012030282A1 true WO2012030282A1 (en) 2012-03-08

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3065843A4 (en) * 2013-11-08 2017-06-28 Hugues Wanlin Rotary vacuum and screen system and methods for separating solids and liquids
CN108745663A (en) * 2018-06-01 2018-11-06 定州市四丰环保科技有限公司 Centrifugal separator for solid from liquid
CN112789096A (en) * 2019-09-11 2021-05-11 株式会社Lg化学 Apparatus and method for cleaning metal filters

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Publication number Priority date Publication date Assignee Title
US3278039A (en) * 1965-02-02 1966-10-11 Vargons Mek Verkst Ab Rotary filter drum for concentrating diluted fibre suspensions
US3519137A (en) * 1968-04-03 1970-07-07 Harry Wilhelm Nilsson Rotary filter drum for concentrating diluted fibre suspensions
GB2162080A (en) * 1984-07-26 1986-01-29 Champion Int Corp Filtering
EP1683562A1 (en) * 2005-01-20 2006-07-26 Knoll Maschinenbau Gmbh Cleaning device for filter belts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278039A (en) * 1965-02-02 1966-10-11 Vargons Mek Verkst Ab Rotary filter drum for concentrating diluted fibre suspensions
US3519137A (en) * 1968-04-03 1970-07-07 Harry Wilhelm Nilsson Rotary filter drum for concentrating diluted fibre suspensions
GB2162080A (en) * 1984-07-26 1986-01-29 Champion Int Corp Filtering
EP1683562A1 (en) * 2005-01-20 2006-07-26 Knoll Maschinenbau Gmbh Cleaning device for filter belts

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3065843A4 (en) * 2013-11-08 2017-06-28 Hugues Wanlin Rotary vacuum and screen system and methods for separating solids and liquids
US11213771B2 (en) 2013-11-08 2022-01-04 Andrew Richard Hicks Rotary vacuum and screen system and methods for separating solids and liquids
CN108745663A (en) * 2018-06-01 2018-11-06 定州市四丰环保科技有限公司 Centrifugal separator for solid from liquid
CN112789096A (en) * 2019-09-11 2021-05-11 株式会社Lg化学 Apparatus and method for cleaning metal filters

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