WO2016193530A1 - Unité de filtre pour filtrage d'air et procédé de nettoyage dudit filtre - Google Patents

Unité de filtre pour filtrage d'air et procédé de nettoyage dudit filtre Download PDF

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Publication number
WO2016193530A1
WO2016193530A1 PCT/FI2016/050322 FI2016050322W WO2016193530A1 WO 2016193530 A1 WO2016193530 A1 WO 2016193530A1 FI 2016050322 W FI2016050322 W FI 2016050322W WO 2016193530 A1 WO2016193530 A1 WO 2016193530A1
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WO
WIPO (PCT)
Prior art keywords
filter
filter unit
air
bars
filter element
Prior art date
Application number
PCT/FI2016/050322
Other languages
English (en)
Inventor
Pauli MANSUKOSKI
Original Assignee
Pmu Air Oy
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 Pmu Air Oy filed Critical Pmu Air Oy
Publication of WO2016193530A1 publication Critical patent/WO2016193530A1/fr

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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
    • 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
    • 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
    • B01D46/66—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
    • 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
    • B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
    • B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations

Definitions

  • the present disclosure relates generally to a filter unit; and more specifically, to a filter unit for filtering dust particles from air.
  • Air filters are widely used for filtering dust particles from air.
  • An air filter can be found in a manufacturing facility, where several machines are used for performing various manufacturing processes, such as chipping, cutting, drilling and the like, on a metallic, a wooden or a plastic workpiece.
  • air filters are used for filtering dust particles, form the air of the manufacturing facility, formed due to performing various manufacturing steps.
  • an air filter includes a plurality of filter units having at least one filter bag made of a suitable fabric and often supported by a wire frame. Further, the filter bags are enclosed within a housing (or container) generally having an inlet for air to be filtered and an outlet for filtered air.
  • the air filter includes a pump for generating a pressure difference for drawing air through the inlet and thereafter allowing the air to pass through the filter bags, which cause filter residue to be collected on an outer side of the filter bags.
  • the filter residue collected on the filter bags are cleaned or dislodged by reversing the airflow direction of the pump and the dislodged filter residue are finally collected into a hopper.
  • an operational efficiency of such air filters is determined by a filtering throughput of the air filters.
  • the filtering throughput of an air filter is a volume of filtered air that can be produced by the air filter corresponding to a size of the air filter.
  • an air filter must have a large filter area (for example large filter bags).
  • the existing air filters generally include small filter area and accordingly provide less filtering throughput.
  • a large number of filter units needs to be employed in the air filter, which increases the structural complexity without considerably improving the filtering throughput of the air filter.
  • the existing air filters are subjected to a problem of cleaning the filter unit, as light dust tends to clog on the filtering surface.
  • the present disclosure seeks to provide a filter unit for a filter arrangement.
  • the present disclosure also seeks to provide a filter arrangement comprising a number of filter units. [007] The present disclosure further seeks to provide a method for cleaning a filter unit.
  • an embodiment of the present disclosure provides a filter unit comprising :
  • a filter plate having a first side and a second side
  • a collar flange having a first side and a second side, attached to the second side of the filter plate
  • each bar is attached to the second side of the collar flange and the second end of each bar is attached to the first side of the end plate, in an essentially circular pattern
  • the bars are arranged essentially equidistantly along the circular pattern
  • an embodiment of the present disclosure provides a filter arrangement comprising a number of filter units, an inlet for air to be filtered, an outlet for filtered air, an inlet for cleaning air, an outlet for cleaning air and an outlet for filter residue.
  • an embodiment of the present disclosure provides a method for cleaning the filter unit, in which filter unit air to be filtered passes from the outside of the filter unit towards its inside.
  • the method comprises: - feeding cleaning air from the inside of the filter unit towards its outside, at a force sufficient for the filter element to change its shape, whereby filter residue accumulated in the filter element is dislodged, and
  • Embodiments of the present disclosure substantially eliminate or at least partially address the aforementioned problems in the prior art, and provide improved constructional aspects to a filter unit for having an increased filtering throughput and to achieve efficient cleaning thereof.
  • FIG. 1 is an unassembled elevation view of a filter unit, in accordance with an embodiment of the present disclosure
  • FIGS. 2A-B are plan and sectional elevation views of a filter plate of the filter unit, respectively, in accordance with an embodiment of the present disclosure
  • FIGS. 3A-B are elevation and plan views of a collar flange of the filter unit, respectively, in accordance with an embodiment of the present disclosure
  • FIG. 4 is a plan view of a bar of the filter unit, in accordance with an embodiment of the present disclosure.
  • FIGS. 5A-B are plan and elevation views of a bar support of the filter unit, respectively, in accordance with an embodiment of the present disclosure
  • FIG. 6 is an elevation view of the filter plate, the collar flange and the bars for showing coupling therebetween, in accordance with an embodiment of the present disclosure
  • FIG. 7 is a plan view of a filter element of the filter unit, in accordance with an embodiment of the present disclosure.
  • FIGS. 8A-B are elevation and plan views of an end plate of the filter unit, in accordance with an embodiment of the present disclosure.
  • FIG. 9 is a perspective view of a clamp ring of the filter unit, in accordance with an embodiment of the present disclosure.
  • FIG. 10 is a schematic view of a filter arrangement, in accordance with an embodiment of the present disclosure.
  • FIGS. 11A-B are plan views of the filter element arranged on the end plate while filtering the air and while cleaning the filter unit, respectively, in accordance with an embodiment of the present disclosure.
  • FIG. 12 illustrates steps of a method for cleaning a filter unit, in accordance with an embodiment of the present disclosure.
  • an underlined number is employed to represent an item over which the underlined number is positioned or an item to which the underlined number is adjacent.
  • a non-underlined number relates to an item identified by a line linking the non-underlined number to the item. When a number is non-underlined and accompanied by an associated arrow, the non-underlined number is used to identify a general item at which the arrow is pointing.
  • an embodiment of the present disclosure provides a filter unit.
  • the filter unit comprises a filter plate having a first side and a second side; a collar flange having a first side and a second side, attached to the second side of the filter plate; an end plate having a first side and a second side; and a number of bars each having a first end and a second end.
  • the first end of each bar is attached to the second side of the collar flange and the second end of each bar is attached to the first side of the end plate, in an essentially circular pattern.
  • the number of bars is 10- 20, a circumference of the circular pattern formed by the bars is 250-600 mm, and the bars are arranged essentially equidistantly along the circular pattern.
  • the filter unit also comprises a filter element made from fabric.
  • the filter element is in the form of a tube having a circumference of 700- 2000 mm, and arranged in contact with the bars in such a manner that the bars are arranged essentially equidistantly along the circumference of the filter element.
  • the filter element further comprises a channel for each bar, the channels being arranged equidistantly along the circumference of the tube.
  • an embodiment of the present disclosure provides a filter arrangement that comprises a number of filter units, an inlet for air to be filtered, an outlet for filtered air, an inlet for cleaning air, an outlet for cleaning air and an outlet for filter residue.
  • an embodiment of the present disclosure provides a method for cleaning a filter unit, in which filter unit air to be filtered passes from the outside of the filter unit towards its inside.
  • the method comprises feeding cleaning air from the inside of the filter unit towards its outside, at a force sufficient for the filter element to change its shape, whereby filter residue accumulated in the filter element is dislodged; and collecting the dislodged filter residue from the filter unit.
  • the filter unit of the present disclosure is capable of filtering dust particles from air.
  • the filter unit of the present disclosure may be used in conjunction with a manufacturing facility for filtering dust particles, from the air, formed due to performing various manufacturing steps.
  • dust particles used herein means any "particle” or “particulates”, such as fine powder or chips produced from the workpiece and added to the air while performing any manufacturing process on the workpiece.
  • the filter unit of the present disclosure is commonly known as a baghouse.
  • the present device is such that during filtering as well as cleaning cycles, the filter element cannot move in such a manner that the filter element would touch any other part of the filter unit. Indeed, without the channels for the bars, the filter element (i.e.
  • the filter bag typically made of fabric
  • the filter bag would move, especially outwards during the cleaning cycle, in an uneven manner.
  • the filter element fulfils its function of filtering, it becomes clogged with dust particles.
  • the dust particles do not typically collect in an even manner on the whole circumference and surface of the filter element, but rather in an uneven manner. This results in the filter element moving towards the outside in an uneven manner, when air is passed from the inside of the filter unit towards its outside, to clean the filter element. This problem is now avoided with the use of the channels for each bar, thus preventing uneven movement of the filter element.
  • the filter plate of the filter unit is configured to have a rectangular plate like structure, which acts as a lid for a filter arrangement (or air filter).
  • the filter plate may be configured to have circular, oval or other polygonal shape.
  • the filter plate includes a plurality of openings for providing the airflow therethrough.
  • the filter plate includes eight openings, however the filter plate may include more or less than eight openings based on a size of the filter arrangement.
  • the filter plate also includes several peripheral holes around each of these openings.
  • the filter plate includes a first set of peripheral holes equidistantly arranged in a circular manner around the each opening.
  • the first set of peripheral holes includes twelve holes.
  • the filter plate includes a second set of peripheral holes radially away from the first set of peripheral holes, and equidistantly arranged in a circular manner around the each opening.
  • the second set of peripheral holes includes six holes.
  • the filter plate further includes a plurality of mounting nuts for supporting the filter plate as the lid on a container of the filter arrangement.
  • the container of the filter arrangement may include flanges (or lips) on which the filter plate may be supported and the filter plate may be coupled to the flanges of the container using the mounting nuts.
  • the filter plate includes four such mounting nuts.
  • the collar flange of the filter unit includes a hollow cylindrical structure having a flange.
  • the collar flange includes a hollow cylindrical body portion and a circular flange portion extending from an end portion of the body portion.
  • the collar flange includes the hollow cylindrical body portion on the first side and the flange portion on the second side.
  • a diameter of the hollow cylindrical body portion is larger is larger as compared to a length of the hollow cylindrical body portion.
  • the collar flange also includes a central through opening, which runs along the hollow cylindrical body portion, for the airflow.
  • the collar flange also includes a first set of peripheral holes and a second set of peripheral holes.
  • the first and second set of peripheral holes is arranged equidistantly in a circular manner on the flange portion around the central through opening.
  • the first set of peripheral holes includes twelve holes
  • the second set of peripheral holes includes six holes.
  • the first set of peripheral holes conforms to the first set of peripheral holes of the filter plate
  • the second set of peripheral holes conforms to the second set of peripheral holes of the filter plate.
  • the collar flange is mechanically coupled to the filter plate using a plurality of socket head cap screws. Specifically, the plurality of socket head cap screws is received through the second set of peripheral holes of the collar flange and the filter plate. Thereafter, a plurality of nut and washer assembly is threadably coupled to the plurality of socket head cap screws for anchoring the collar flange with the filter plate.
  • the collar flange may be mechanically coupled to the filter plate using other mechanical coupling such as a snap fit arrangement, direct threaded coupling, supporting brackets and the like. Alternatively, the collar flange may be an integral part of the filter plate.
  • each bar of the filter unit is an elongated cylindrical rod.
  • the bars can be hollow or solid cylindrical rods.
  • the each bar may include a diameter of about 6-12 mm.
  • the each bar may include a length of about 50-5000 mm.
  • the each bar includes a diameter of about 8 mm and a length of about 1500 mm.
  • the each bar at their first and second ends include external threads configured thereon.
  • the filter unit includes a number of bars, i.e. 10- 20 bars. In an example, the filter unit includes 12 bars. Further, the circumference of the circular pattern formed by the bars is 250-600 mm. In an example, the circumference of the circular pattern formed by the bars is about 350 mm.
  • each bar is attached to the second side of the collar flange, and the bars are arranged essentially equidistantly along the circular pattern. Specifically, the first end of the each bar is received through, the first set of peripheral holes of the collar flange, conforming to the first set of peripheral holes of the filter plate (coupled to the collar flange). Thereafter, the first end of the each bar is threadably coupled to a washer and nut assembly. This allows the bars to integrally extend from the filter plate.
  • the first end of each bar may be attached directly to the filter plate.
  • the first end of the each bar may be received through first set of peripheral holes of the filter plate and thereafter threadably coupled to a washer and nut assembly.
  • the filter unit may not include the collar flange and the filter plate may not include the second set peripheral holes.
  • the filter element is a rectangular fabric sheet having a first end and a second end.
  • the fabric of the filter element is made of a material selected from the group consisting of polyester, polyamide, polyethylene and polypropylene.
  • a permeability of the fabric of the filter element is 15-50 litres/dm 2 /min a t 200Pa.
  • the fabric of the filter element is configured to have a permeability such that the filter element can strain the dust particles and allow the air to pass therethrough, when the air to be filtered is allowed (or forced) to pass through the filter element.
  • the filter element comprises a channel for each bar, the channels being arranged equidistantly along the circumference of the tube.
  • the channels are cylindrical openings running along a length between the first and second ends of the filter element.
  • the channels are integral parts of the filter element and configured (or made) by sewing the filter element.
  • the channels may be separate parts sew to the filter element.
  • the channels are adapted to receive therethrough such that the first end of the filter element is positioned in proximity to the first end of each bar and the second end of the filter element is positioned in proximity to the second end of each bar.
  • the filter element is in the form of the tube having the circumference of 700-2000 mm.
  • the filter element is arranged in contact with the bars in such a manner that the bars are arranged essentially equidistantly along the circumference of the filter element.
  • the circumference of the circular pattern formed by the bars corresponds to a circumference formed by the channels on the filter element.
  • the filter element includes connecting portions between the channels to provide larger circumference of about 700-2000 mm compared to the circumference (of the circular pattern formed by the bars) of 250-600 mm.
  • the end plate of the filter unit is a closed cylindrical body having the first side and the second side.
  • the end plate may be a hollow cylindrical structure, which is closed at its first side.
  • the end plate also includes a set of peripheral holes arranged on the first side of the end plate. The set of peripheral holes conforms to the first set of peripheral holes the collar flange and the filter plate.
  • each bar is attached to the first side of the end plate. Specifically, the second end of each bar is received through the set of peripheral holes of the end plate, and threadably coupled to a washer and nut assembly. This allows the bars to be arranged between the collar flange and the end plate with the filter element supported thereon.
  • the filter unit of the present disclosure also comprises a pair of clamp rings.
  • Each clamp ring comprises a loop and an adjustable fastening arrangement.
  • the adjustable fastening arrangement is arranged on end portions of the loop and adapted to be operated for diametrically adjusting dimensions (i.e. a diameter) of the loop.
  • the clamp rings are used for securely tightening the first and second ends of the filter element on the collar flange and the end plate, respectively. Specifically, when the first and second ends of the filter element extend over the collar flange and the end plate, respectively, and the first and second ends are securely tightened over the collar flange and the end plate by operating the adjustable fastening arrangement of the clamp rings. Further, the clamp rings detachably secures the first and second ends of the filter element on the collar flange and the end plate, respectively.
  • the filter unit of the present disclosure also comprises a bar support arranged between the filter plate and the end plate for supporting the bars.
  • the bar support is a circular structure having a plurality of radially extending arms, which are uniformly spaced apart from each other.
  • each of the radially extending arms includes a length of 8 mm.
  • each of the arms includes a circular recess arranged at an end portion thereof.
  • the circular recesses of the bar support are adapted to receive the bars therein for providing structural rigidity to the circular pattern formed by the bars.
  • the bar support provides support to the bars by keeping the bars from bending inwards, when the air is allowed to pass through the filter element for cleaning the air and cleaning the filer unit, which is explained herein later.
  • the filter unit of the present disclosure further comprises additional components, such as collar flanges, end plates, filter elements, bars, bar supports, clamp rings and washer and nut assemblies, based on the number of openings (such as 8 openings) present on the filter plate.
  • additional collar flanges, the end plates, the filter elements, the bars, the bar supports, the clamp rings and the washer and nut assemblies are arranged in a similar manners as explained herein above on the filter plate to constitute an entire filter unit.
  • the filter plate is arranged with 8 filtering tubes (configured by various components of the filter unit, i.e. the collar flanges, the end plates, the filter elements, the bars, the bar supports, the clamp rings and washer and nut assemblies) to constitute the entire filter unit.
  • the filter arrangement comprises several such filter units for filtering the air.
  • the filter arrangement includes two such filter units.
  • the filter arrangement may include a single filter unit or more than two filter units.
  • the filter arrangement comprises an inlet for air to be filtered and an outlet for filtered air.
  • the filter arrangement includes a container configured with the inlet for air to be filtered and the outlet for filtered air.
  • the filter plate is adapted to be arranged as the lid on the container.
  • the filter arrangement also comprises a pump.
  • the pump is operatively arranged in proximity to the outlet and above the filter plate.
  • the pump is turned ON for creating a pressure difference above the filter plate.
  • This allows the air to be filtered (or dirty air having dust particles) to be drawn (or suctioned) inside the container through the inlet.
  • the air to be filtered passes through the filter element due to the pressure difference created by the pump.
  • this causes change in the shape of the filter elements; particularly the connecting portions between the channels are radially drawn inside with the flow of the air to be filtered.
  • the dust particle present in the air is filtered (or strained), i.e. collected on the connecting portions of the filter element.
  • the filtered air (the air removed from the dust particles after passing through the filter element) is drawn towards the outlet of the container of the filter arrangement.
  • the filtered air accordingly can be released to the atmosphere.
  • the filter arrangement also comprises a pressure sensor arranged in the outlet for detecting a pressure drop inside the filter element (or filtering tube).
  • the filter element includes the permeability of about 15-50 litres/dm 2 /min a t 200 Pa (Pascal).
  • the filter arrangement may be configured to have a predetermined threshold of about 200 Pascal inside the filter element to achieve the permeability of about 15-50 litres/dm 2 /min. i n case the pressure falls below the predetermined threshold a filtering throughput of the filter arrangement may also drop.
  • the filter u nit, particularly the filter elements thereof require cleaning .
  • the filter arrangement also comprises an inlet for cleaning air and an outlet for cleaning air.
  • the inlet for cleaning air is essentially arranged in proximity to the outlet and above the filter plate for allowing the cleaning air to be blown towards the filter element.
  • the outlet for cleaning air is essentially constituted by the filter element such that the cleaning air can be blown through the filter element.
  • cleaning air used herein refers to the air provided to the filter element (or filtering tube) in a reverse direction for cleaning the filter elements. Therefore, the cleaning of the filter unit is accomplished by feeding the cleaning air from the inside of the filter unit towards its outside, at a force sufficient for the filter element to change its shape, whereby the filter residue accumulated in the filter element is dislodged .
  • the pump when the pressure sensor senses a pressure below the predetermined threshold (of about 200 Pa) the pump may be operated in a reverse direction for providing the cleaning air to the filter elements (or filtering tubes). This changes shape of the filter elements, thereby dislodging the filter residue collected on the filter elements fabric. For example, the connecting portions between the channels bulge out with the reverse direction of the air flow for dislodging the filter residue from the filter elements.
  • the filter arrangement also comprises an outlet for the filter residue.
  • the outlet for the filter residue is constituted by a hopper of the filter arrangement.
  • coarse dust particles fall directly in the outlet for the filter residue (i.e. the hopper).
  • the light dust particles are dislodged from the filter elements by the cleaning air for being collected in the outlet for the filter residue.
  • various components of the filter unit except the filter element may be made of plastic, metal, rubber or any combination thereof. Further, such components of the filter unit may be manufactured using a suitable manufacturing technique such as injection moulding, casting and the like.
  • the present disclosure provides a filter unit, a filter arrangement having such filter unit and a method for cleaning such filter unit.
  • the filter unit can be used in conjunction with a filter arrangement of a manufacturing facility or an enclosed manufacturing machine for filtering dust particles from the air associated with the manufacturing facility or the manufacturing machine.
  • the filter unit of the present disclosure includes various aspects that increase a filtering throughput of the filter unit.
  • the filter unit of the present disclosure includes various improved constructional aspects, such as the number of bars about 10-20, the circumference of the circular pattern formed by the bars of about 250-600 mm, the filter element in the form of a tube having a circumference of 700-2000 and the like, which enable in increasing the filtering throughput of the filter unit.
  • the filter unit includes a large filter area (i.e. the filter elements) which enables in increasing the filtering throughput of the filter unit.
  • the tubes formed by the filter elements are arranged in a compact manner on the filter plate of the filter unit, which enables in reducing an overall area of the filter arrangement and increase the filtering throughput of the filter unit.
  • the improved constructional aspects also enable in achieving efficient cleaning of the filter unit.
  • the filter unit 100 includes a filter plate 102.
  • the filter unit 100 also includes a collar flange 104 adapted to be attached to the filter plate 102.
  • the filter unit 100 also includes a number of bars 106 adapted to be attached to the collar flange 104 in an equidistantly and circular pattern .
  • first (or top) ends of the bars 106 are adapted to be attached to the collar flange 104 using fasteners 108 (such as washer and nut assembly).
  • the filter unit 100 further includes a bar support 110 for supporting the bars 106.
  • the filter u nit 100 also includes a filter element 112 made from a fabric.
  • the filter element 112 is arranged in contact with the bars 106 in such a man ner that the bars 106 are arranged essentially equidistantly along a circumference of the filter element 112.
  • the filter element 112 includes channels for receiving the bars 106 there- through .
  • the filter unit 100 also includes an end plate 114 adapted to be attached to the bars 106.
  • second (or bottom) ends of the bars 106 are adapted to be attached to the end plate 114 using fasteners 116 (such as washer and nut assembly).
  • the filter unit 100 also includes a pair of clamp rings 118 adapted to securely tighten end portions of the filter element 112 onto the collar flange 104 and the end plate 114.
  • the filter plate 102 includes a plurality of openings, such as openings 202.
  • the filter plate 102 includes eig ht openings 202.
  • the filter plate 102 also includes a first set of peripheral holes, such as holes 204, arranged in a circular man ner around the openings 202.
  • the first set of peripheral holes 204 includes twelve holes.
  • the filter plate 102 also includes a second set of peripheral holes, such as holes 206, radially away from the first set of peripheral holes 204.
  • the second set of peripheral holes 206 includes six holes.
  • the filter plate 102 further includes a plurality of mounting nuts, such as mounting nuts 208. As shown, the filter plate 102 includes four mounting nuts 208.
  • FIG. 2B is the sectional elevation view of the filter plate 102 along axis X-X' of the FIG. 2A. As shown, the filter plate 102 also includes a first side 212 and a second side 214 opposite to the first side 212.
  • FIGS. 3A-B illustrated are elevation and plan views of the collar flange 104 of the filter unit 100, respectively, in accordance with an embodiment of the present disclosure.
  • the collar flange 104 includes a hollow cylindrical body portion 302 and a circular flange portion 304 extending from an end portion of the body portion 302.
  • the collar flange 104 also includes a first side 306 (having the body portion 302) and a second side 308 (having the flange portion 304) opposite to the first side 306.
  • FIG. 3B shows that the collar flange 104 includes a central th rough opening 310.
  • the collar flange 104 also includes a first set of peripheral holes, such as holes 312, and a second set of peripheral holes, such as holes 314.
  • the first and second set of peripheral holes 312, 314 is arranged in a circular manner on the flange portion 304 around the central th rough opening 310. Further, the first set of peripheral holes 312 conforms to the first set of peripheral holes 204 of the filter plate 102, and the second set of peripheral holes 314 conforms to the second set of peripheral holes 206 of the filter plate 102.
  • FIG. 4 illustrated is a plan view of the bar 106 of the filter unit 100, in accordance with an embodiment of the present disclosure.
  • the bar 106 is an elongated tubular structure and includes a first end 402 and a second end 404 opposite to the first end 402. As shown, the first and second ends 402, 404 include external threads configured thereon .
  • FIGS. 5A-B illustrated are plan and elevation views of the bar support 110 of the filter unit 100, respectively, in accordance with an embodiment of the present disclosure.
  • the bar support 110 includes a plurality of radially extending arms 502, which are uniformly spaced apart from each other.
  • Each of the arms 502 includes a circular recess 504 arranged at an end portion thereof.
  • FIG. 6 illustrated is an elevation view of the filter plate 102, the collar flange 104 and the bars 106 for showing coupling therebetween, in accordance with an embodiment of the present disclosure.
  • the filter plate 102 is adapted to be arranged on a container (not shown) of a filter arrangement as a lid with the help of the mounting nuts 208.
  • the collar flange 104 is attached to the filter plate 102 using a plurality of socket head cap screws, such as screws 602, received through the second set of peripheral holes 206 (shown in FIG. 2A) of the filter plate 102.
  • the screws 602 attach the second side 308 (particularly with the flange portion 304) of the collar flange 104 with the second side 214 of the filter plate 102. Thereafter, first end, such as the first end 402, of the each bar 106 is attached to the second side 308 of the collar flange 104 (particularly with the flange portion 304). Specifically, the first end 402 of each bar 106 is received through the first set of peripheral holes 312 of the collar flange 104 and the first set of peripheral holes 204 of the filter plate 102, and thereafter threadably coupled to the fasteners 108 (i.e. the washer and nut assembly). This allows the bars 106 to integrally extend from the filter plate 102.
  • the fasteners 108 i.e. the washer and nut assembly
  • FIG.7 illustrated is a plan view of the filter element 112 of the filter unit 100, in accordance with an embodiment of the present disclosure.
  • the filter element 112 is made from the fabric and includes a first end 702 and a second end 704.
  • the filter element 112 also includes a plurality of channels, such as channels 706, arranged between the first and second ends 702, 704.
  • the channels 706 are arranged (or attached) on the filter element 112 with the help of stitching 708.
  • the filter element 112 also includes connecting portions, such as connecting portions 710, between the channels 706.
  • the filter element 112 is configured to form a tube around the bars 106 (shown in FIG.6).
  • the channels 706 of the filter element 112 receive the bars 106 such that the bars 106 are arranged essentially equidistantly along a circumference of the filter element 112.
  • the bar support 110 (shown in FIG. 5B) is arranged between the bars 106 for supporting and uniformly spacing apart the bars 106 extending vertically from the filter plate 102.
  • FIGS. 8A-B illustrated are elevation and plan views of the end plate 114 of the filter unit 100, in accordance with an embodiment of the present disclosure.
  • the end plate 114 is a closed cylindrical body having a first side 802 and a second side 804.
  • the end plate 114 also includes a set of peripheral holes, such as holes 806, arranged on the first side 802 of the end plate 114.
  • the set of peripheral holes 806 conforms to the first set of peripheral holes 204 (of the filter plate 102, shown in FIG. 2A) and the first set of peripheral holes 312 (of the collar flange 104, shown in FIG.3B).
  • the second end 404 (of each bar 106, shown in FIG.4) is attached to the first side 802 of the end plate 114.
  • the second end 404 (of each bar 106) is received through the set of peripheral holes 806 of the end plate 114, and threadably coupled to the fasteners 116 (i.e. the washer and nut assembly, shown in FIG. 1). This allows the bars 106 to be arranged between the collar flange 104 and the end plate 114 with the filter element 112 supported thereon.
  • FIG. 9 illustrated is a perspective view of a clamp ring, such as the clamp ring 118, of the filter unit 100, in accordance with an embodiment of the present disclosure.
  • the clamp ring 118 includes a loop 902 and an adjustable fastening arrangement 904.
  • the adjustable fastening arrangement 904 is arranged on end portions of the loop 902 and adapted to be operated for diametrically adjusting dimensions (i.e. a diameter) of the loop 902.
  • the clamp ring 118 is used for securely tightening the first and second ends 702, 704 (shown in FIG. 7) of the filter element 112. Specifically, the first and second ends 702, 704 of the filter element 112 extend over the collar flange 104 and the end plate 114, respectively, and thereafter the first and second ends 702, 704 are securely tightened over the collar flange 104 and the end plate 114 using the clamp rings 118.
  • FIG. 10 illustrated is a schematic view of a filter arrangement 1000, in accordance with an embodiment of the present disclosure.
  • the filter arrangement 1000 includes a number of filter units, such as the filter units 100, depicted and explained in conjunction with the FIGS. 1-9.
  • the filter plate 102 of the filter unit 100 is arranged on a container 1002 of the filter arrangement 1000 as a lid. Further, the collar flange 104 is coupled to the filter unit 100, and the first end 702 of the filter element 112 is securely tightened over the collar flange 104 with the clamp ring 118. Similarly, the second end 704 of the filter element 112 is securely tightened over the end plate 114 (not shown) with the clamp ring 118.
  • the filter arrangement 1000 also includes an inlet 1004 for air to be filtered and an outlet 1006 for filtered air.
  • a pump (not shown) is operatively arranged in proximity to the outlet 1006 and above the filter plate 102.
  • the pump is tu rned ON for creating a pressure difference above the filter plate 102.
  • This allows the air to be filtered (shown with arrows Y) to be drawn inside the container 1002, and fu rther pass th rough the filter element 112.
  • the dust particle present in the air to be filtered is strained by the filter element 112. Further, the filtered air (shown with arrows Z) is drawn towards the outlet 1006 through the filter element 112.
  • the filter arrangement 1000 also includes an inlet for cleaning air and an outlet for cleaning air.
  • the cleaning air is provided to the filter element 112 for dislodging filter residue collected on the filter element 112.
  • the cleaning air is generated by reversing the operation of the pump, such that the air is blown towards the filter element 112, instead on being drawn through the filter element 112.
  • the inlet for cleaning air is not shown ; however, such inlet is essentially arranged in proximity to the outlet 1006 and above the filter plate 102 for allowing the cleaning air (shown with arrow U) to be blown towards the filter element 112.
  • the outlet for cleaning air is also not shown ; however, such outlet is essentially constituted by the filter element 112 such that the cleaning air (shown with arrow V) can be blown through the filter element 112. This causes the filter element 112 to bulge-out and dislodge the filter residue collected on the filter element 112.
  • the filter arrangement 1000 also includes an outlet 1008 (such as a hopper) for filter residue (i.e. dislodge dust particles). The heavier dust particles are directly collected through the outlet 1008, whereas the lig ht dust particles are dislodged from the filter element 112 by reversing the operation of the pump for being collected by the outlet 1008. [0062] Referring now to FIGS.
  • FIG. 11A-B illustrated are plan views of the filter element 112 arranged on the end plate 114 while filtering the air and while cleaning the filter unit 100, respectively, in accordance with an embodiment of the present disclosure.
  • the bars 106 are received through the channels 706 of the filter element 112, and attached to the end plate 114.
  • the connecting portions 710 of the filter element 112 between the channels 706 are drawn centrally along with the air to be filtered for allowing the air to pass there-through and thereby straining the dust particles.
  • FIG. 11A the bars 106 are received through the channels 706 of the filter element 112, and attached to the end plate 114.
  • the connecting portions 710 of the filter element 112 between the channels 706 are drawn centrally along with the air to be filtered for allowing the air to pass there-through and thereby straining the dust particles.
  • FIG. 11A the bars 106 are received through the channels 706 of the filter element 112, and attached to the end plate 114.
  • the con necting portions 710 of the filter element 112 between the channels 706 bu lge-out along with the cleaning air for allowing the air to pass there-through and thereby dislodging the filter residue collected on the filter element 112.
  • FIG. 12 illustrated are steps of a method 1200 for cleaning a filter u nit, such as the filter unit 100, in accordance with an embodiment of the present disclosure.
  • the method 1200 illustrates the steps for cleaning the filter unit in which the air to be filtered passes from an outside of the filter u nit towards its inside.
  • the method 1200 illustrates the steps for cleaning the filter unit 100, explained in conjunction with the FIG. 11B.
  • cleaning air is fed from the inside of the filter unit towards its outside. Further, the cleaning air includes a force sufficient for a filter element to change its shape. This allows filter residue accumulated in the filter element to dislodge.
  • the dislodged filter residue is collected from the filter unit.

Landscapes

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

Abstract

L'invention concerne une unité de filtre comprenant une plaque de filtre ayant un premier côté et un second côté; une bride de collier possédant un premier côté et un second côté, fixé au second côté de la plaque de filtre; une plaque d'extrémité possédant un premier côté et un second côté; et un certain nombre (10-20) de barres comportant chacune une première extrémité et une seconde extrémité. La première extrémité de chaque barre est fixée au second côté de la bride de collier et la seconde extrémité de chaque barre est fixée au premier côté de la plaque d'extrémité, dans un motif essentiellement circulaire ayant une circonférence de 250 à 600 mm. L'unité de filtre comprend également un élément filtrant fabriqué en tissu. L'élément filtrant forme un tube ayant une circonférence de 700 à 2000 mm, et placé en contact avec les barres pratiquement à égale distance le long de la circonférence de l'élément filtrant, comprenant un canal pour chaque barre, les canaux étant disposés à égale distance le long de la circonférence du tube.
PCT/FI2016/050322 2015-05-29 2016-05-17 Unité de filtre pour filtrage d'air et procédé de nettoyage dudit filtre WO2016193530A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1509312.3 2015-05-29
GB1509312.3A GB2538801B (en) 2015-05-29 2015-05-29 Filter unit for filtering air

Publications (1)

Publication Number Publication Date
WO2016193530A1 true WO2016193530A1 (fr) 2016-12-08

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Application Number Title Priority Date Filing Date
PCT/FI2016/050322 WO2016193530A1 (fr) 2015-05-29 2016-05-17 Unité de filtre pour filtrage d'air et procédé de nettoyage dudit filtre

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GB (1) GB2538801B (fr)
WO (1) WO2016193530A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108554114A (zh) * 2018-05-16 2018-09-21 盐城项远环保设备有限公司 一种除硫、硝烟气的过滤吸附装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991006359A1 (fr) * 1989-10-25 1991-05-16 ABB Fläkt AB Dispositif pour la separation des particules de poussieres contenues dans un gaz
EP0859658A1 (fr) * 1993-09-23 1998-08-26 Scott A. Gubler Ensemble filtre souple et compact pour une enrobeuse, un sechoir ou un granulateur a lit fluidise
US5800580A (en) * 1993-10-27 1998-09-01 Feldt; Klas-Goran Support cage for glass fiber bag filter for gas filtration
WO2012137303A1 (fr) * 2011-04-05 2012-10-11 日本スピンドル製造株式会社 Filtre de dépoussiérage, appareil de dépoussiérage doté de celui-ci et procédé de fabrication de filtre de dépoussiérage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251244A (en) * 1979-03-12 1981-02-17 Wheelabrator-Frye Inc. Jet pulse bag type collector
US4259095A (en) * 1979-09-26 1981-03-31 Johnson Jr Allen S Bag-type filter apparatus with combination bag support and air diffuser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991006359A1 (fr) * 1989-10-25 1991-05-16 ABB Fläkt AB Dispositif pour la separation des particules de poussieres contenues dans un gaz
EP0859658A1 (fr) * 1993-09-23 1998-08-26 Scott A. Gubler Ensemble filtre souple et compact pour une enrobeuse, un sechoir ou un granulateur a lit fluidise
US5800580A (en) * 1993-10-27 1998-09-01 Feldt; Klas-Goran Support cage for glass fiber bag filter for gas filtration
WO2012137303A1 (fr) * 2011-04-05 2012-10-11 日本スピンドル製造株式会社 Filtre de dépoussiérage, appareil de dépoussiérage doté de celui-ci et procédé de fabrication de filtre de dépoussiérage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108554114A (zh) * 2018-05-16 2018-09-21 盐城项远环保设备有限公司 一种除硫、硝烟气的过滤吸附装置

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GB2538801B (en) 2017-12-20
GB2538801A (en) 2016-11-30

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