WO2005023393A1 - Filtration cartridges with metallic end members and method of manufacturing - Google Patents
Filtration cartridges with metallic end members and method of manufacturing Download PDFInfo
- Publication number
- WO2005023393A1 WO2005023393A1 PCT/CA2003/001394 CA0301394W WO2005023393A1 WO 2005023393 A1 WO2005023393 A1 WO 2005023393A1 CA 0301394 W CA0301394 W CA 0301394W WO 2005023393 A1 WO2005023393 A1 WO 2005023393A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- edge
- filtration
- extension band
- filtration element
- metallic
- Prior art date
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 116
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims description 13
- 238000009958 sewing Methods 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 10
- 239000000428 dust Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/111—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
- B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
- B01D46/2414—End caps including additional functions or special forms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2265/06—Details of supporting structures for filtering material, e.g. cores
Definitions
- Filtration cartridges are well known as cleaning media for fluids (liquids or gases) in a wide range of applications. For instance, in the case of gases, filtration cartridges advantageously replace bags made of porous paper or fabric to remove particles therefrom.
- a filtration cartridge must take into account the maximum temperature at which it will operate.
- conventional filtration cartridges are only suitable for gases having a relatively low temperature.
- Cartridges for gases having a relatively high temperature are significantly more costly but are nevertheless limited in terms of the maximum gas temperature that they can handle.
- commercially-available filtration cartridges are typically used with gases up to about 200°C. Higher temperatures would result in degradation thereof. This limit is problematic since many industrial plants generate fumes at higher temperatures. Gases must then be cooled before entering the dust collector. Cooling is widely carried out by diluting the hot gases with ambient air. Unfortunately, this increases the volume of gases to be filtered and consequently, it increases the number of required cartridges and thus the size of the dust collector.
- the filtration element is usually a pleated fabric which is typically resistant to a temperature up to about 260°C. This maximum temperature is relatively low compared to the melting point of most metals. For instance, aluminum has a melting point of about 660°C. Immersing a portion of the filtration element directly into molten aluminum would destroy it in a few seconds.
- the present invention reduces the difficulties and disadvantages experienced in the prior art by providing a design allowing to connect metallic end members to the filtration element. Among other things, this results in filtration cartridges having a much higher resistance to mechanical shocks and higher operating temperatures.
- FIG. 1 illustrates a filtration cartridge manufactured with a metallic cast end member in accordance with a first and preferred embodiment of the present invention.
- FIG. 2 shows a second embodiment of the present invention.
- FIG. 1 shows a filtration cartridge (10) having a metallic end member (30) in accordance with the preferred embodiment of the present invention.
- FIG. 2 shows an alternative embodiment thereof. It should be noted that the present invention is not limited to the illustrated embodiments and that many other embodiments can be devised as well without departing from the scope of the appended claims.
- the filtration cartridge (10) comprises a filtration element (20).
- the filtration element (20) is usually in the form of a porous fabric or an equivalent thereof. It is generally provided in a pleated form in order to increase the total surface area. It should be noted, however, that the present invention is not limited to pleated filtration elements.
- the most common form of the filtration element (20) is the one shaped as a hollow cylinder.
- the filtration cartridge (10) comprises at least one metallic end member (30), although most of the time, two metallic end members (30) will be used. Four metallic end members (30) would be present if the filtration element (20) is rectangular.
- the connection between the filtration element (20) and the metallic end member (30) is made using an extension band (40).
- This extension band (40) has a first longitudinal edge (42) attached along an edge (22) of the filtration element (20).
- the extension band (40) is used to increase the length of the filtration element (20) and avoid direct contact of the filtration element (20) with the hot metal during manufacturing.
- the extension band (40) is preferably in the form of a thin metallic sheet band made of a material that can be laminated.
- the thickness of the extension band (40) is preferably between 20 and 500 ⁇ m, with a width between about 5 mm and 150 mm. The width of the extension band must be calculated based in most part on the thermal conductivity of the material being used. Smaller extension bands can be used when thermal conductivity of the material is lower.
- the extension band (40) is preferably connected to it before the pleating is made. This way, the pleating of the filtration element (20) and that of the extension band (40) can be made simultaneously.
- connection between the filtration element (20) and the extension band (40) is made using any suitable connection method. However, it is preferably achieved using sewing, especially if the filtration element (20) is made of a porous fabric.
- Example of materials for the sewing threads (24) are metal, fiberglass, ceramic or Teflon®. Other materials can also be used as well.
- One or more rows of sewing threads (24) may be used.
- the first edge (42) of the extension band (40) preferably overlaps the edge (22) of the filtration element (20) when using sewing.
- Filtration cartridges (10) having a pleated filtration element (20) shaped as a hollow cylinder are generally provided with a porous rigid inner core (50), for instance a metallic cylindrical supporting mesh, coaxially disposed therein.
- An inner core (50) would not be required if the filtration element (20) has sufficient strength by itself. Yet, the inner core (50) is said to be porous, which means that fluids are allowed to flow through it or between its components.
- the inner core (50) is used to rigidly connect the two end members (30) and to support the filtration element (20).
- various kinds of inner cores (50) can be used.
- the inner core (50) can include a plurality of elongated bars connecting both metallic cast end members (30). In all cases, the material must be heat resistant, which means that it must withstand the highest temperatures encountered during the manufacturing process.
- a second edge (44) of the extension band (40) is immersed into molten metal provided in a mold in order to create a metallic cast end member (30).
- the molten metal can be poured into the mold before or after the insertion of the extension band (40).
- the molten metal is then allowed to solidify with the second edge (44) of the extension band (40) embedded therein. If an inner core (50) or another kind of support is provided, then one of its ends is also immersed into the molten metal before it solidifies.
- a second metallic cast end member (30) is manufactured after the first one has solidified.
- the second extension band (40) would preferably be already attached to an opposite side of the filtration element (20) at that point. The whole filtration cartridge (10) is then simply rotated and the second extension band (40) is immersed in another quantity of molten metal.
- the molten metal used for manufacturing the metallic cast end members (30) preferably includes aluminum or an alloy thereof.
- the advantages of using aluminum are numerous. For instance, aluminum has relatively low melting temperature, it is light and it is highly resistant. Nevertheless, other kind of metals can be used as well, including alloys.
- the mold used for shaping a metallic cast end member (30), or a portion thereof can be designed to remain on the filtration cartridge (10) after the manufacturing process.
- the mold can include a cup (60) in which the molten metal is poured. After solidification, the cup (60) would be designed to remain on the outer part of the metallic cast end member (30) and form an integral part thereof. This can be useful to further increase the mechanical properties of the filtration cartridges (10), as well as providing a better surface finish.
- the cup (60) is preferably made of metal, such as steel or any other metal.
- FIG. 2 illustrates another possible embodiment.
- This embodiment would be used essentially for cylindrical filtration cartridges with porous metallic inner core (50).
- the extension band (40) is sewed to the filtration element (20) as in the first embodiment.
- the extension band (40) is squeezed on a corresponding end of the inner core (50), thereby cause it to be permanently deformed. While this deformation may allow some types of extension bands (40) to be suitably held on the inner core (50), a metallic belt (70) or a similar arrangement is preferably used for added resistance.
- a metal plate (72) in then welded on the inner core (50) in order to seal the corresponding end.
- the extension band (40) protects the filtration element (20) from the heat generated by the welding.
- metallic end members (30) allows increasing the maximum operating temperature of the filtration cartridge (10) and increasing its resistance to mechanical shocks. This maximum temperature then become dependant upon the material used for the filtration element (20) and consequently, will be further increased as new and suitable materials are found.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtering Materials (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003266079A AU2003266079A1 (en) | 2003-09-11 | 2003-09-11 | Filtration cartridges with metallic end members and method of manufacturing |
CNB03827034XA CN100400136C (zh) | 2003-09-11 | 2003-09-11 | 具有金属端部构件的滤筒及其制造方法 |
KR1020067004891A KR101074853B1 (ko) | 2003-09-11 | 2003-09-11 | 금속 말단 부재를 구비한 여과 카트리지 및 이의 제조 방법 |
PCT/CA2003/001394 WO2005023393A1 (en) | 2003-09-11 | 2003-09-11 | Filtration cartridges with metallic end members and method of manufacturing |
JP2005508659A JP4430620B2 (ja) | 2003-09-11 | 2003-09-11 | 金属端部部材を備えた濾過カートリッジおよび製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CA2003/001394 WO2005023393A1 (en) | 2003-09-11 | 2003-09-11 | Filtration cartridges with metallic end members and method of manufacturing |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005023393A1 true WO2005023393A1 (en) | 2005-03-17 |
Family
ID=34230628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2003/001394 WO2005023393A1 (en) | 2003-09-11 | 2003-09-11 | Filtration cartridges with metallic end members and method of manufacturing |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP4430620B2 (zh) |
KR (1) | KR101074853B1 (zh) |
CN (1) | CN100400136C (zh) |
AU (1) | AU2003266079A1 (zh) |
WO (1) | WO2005023393A1 (zh) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009226242A (ja) * | 2008-03-19 | 2009-10-08 | Nippon Kankyo Chosa Kenkyusho:Kk | 濾材及びこの濾材を用いた濾過ユニット |
FR3006908B1 (fr) * | 2013-06-14 | 2015-07-03 | Mecaplast Sa | Procede de fabrication d’un element filtrant |
CN103707011B (zh) * | 2013-12-16 | 2016-03-16 | 江苏耐尔冶电集团有限公司 | 一种除铁过滤器的生产工艺 |
CN115350517B (zh) * | 2022-08-01 | 2024-03-15 | 黄山艾科装备科技有限公司 | 一种高效的布袋过滤器 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3857688A (en) * | 1971-10-27 | 1974-12-31 | Ppg Industries Inc | Lead filter |
US5250094A (en) * | 1992-03-16 | 1993-10-05 | Donaldson Company, Inc. | Ceramic filter construction and method |
EP0722761A2 (en) * | 1995-01-17 | 1996-07-24 | Pall Corporation | Filter assembly and method of making a filter assembly |
US6096212A (en) * | 1997-06-10 | 2000-08-01 | Usf Filtration And Separations Group, Inc. | Fluid filter and method of making |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6435861B1 (en) * | 1997-06-10 | 2002-08-20 | Usf Filtration And Separations Group, Inc. | Gas burner assembly and method of making |
-
2003
- 2003-09-11 JP JP2005508659A patent/JP4430620B2/ja not_active Expired - Lifetime
- 2003-09-11 WO PCT/CA2003/001394 patent/WO2005023393A1/en active Application Filing
- 2003-09-11 KR KR1020067004891A patent/KR101074853B1/ko active IP Right Grant
- 2003-09-11 AU AU2003266079A patent/AU2003266079A1/en not_active Abandoned
- 2003-09-11 CN CNB03827034XA patent/CN100400136C/zh not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3857688A (en) * | 1971-10-27 | 1974-12-31 | Ppg Industries Inc | Lead filter |
US5250094A (en) * | 1992-03-16 | 1993-10-05 | Donaldson Company, Inc. | Ceramic filter construction and method |
EP0722761A2 (en) * | 1995-01-17 | 1996-07-24 | Pall Corporation | Filter assembly and method of making a filter assembly |
US6096212A (en) * | 1997-06-10 | 2000-08-01 | Usf Filtration And Separations Group, Inc. | Fluid filter and method of making |
Also Published As
Publication number | Publication date |
---|---|
JP4430620B2 (ja) | 2010-03-10 |
JP2007504932A (ja) | 2007-03-08 |
KR20060079215A (ko) | 2006-07-05 |
KR101074853B1 (ko) | 2011-10-19 |
CN100400136C (zh) | 2008-07-09 |
AU2003266079A1 (en) | 2005-03-29 |
CN1826162A (zh) | 2006-08-30 |
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