CA2141947A1 - A gas filter element - Google Patents
A gas filter elementInfo
- Publication number
- CA2141947A1 CA2141947A1 CA 2141947 CA2141947A CA2141947A1 CA 2141947 A1 CA2141947 A1 CA 2141947A1 CA 2141947 CA2141947 CA 2141947 CA 2141947 A CA2141947 A CA 2141947A CA 2141947 A1 CA2141947 A1 CA 2141947A1
- Authority
- CA
- Canada
- Prior art keywords
- layers
- filter element
- gas filter
- fold line
- fold lines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
2141947 9428997 PCTABS00034 First and second substantially identic layers (15) of rigid material each comprise a plurality of zones, each zone being defined by parallel fold lines (1, 2). The layers are formed of wall elements (10) extending between fold line (2) and a fold line (3), and of wall elements (11) extending between fold line (3) and fold line (1), each wall element (11) containing a plurality of openings (4) spaced along the direction of said fold lines. To form the filter element the two layers (15) are joined together along each fold line (2) to the opposite fold line (1), thus providing a series of chambers (5). The unpurified air flow enters these chambers through the openings (4) of a first layer (15) and exits substantially purified through the openings (4) of the second layer (15).
Description
wo 94/28997 21419 4 7 PCT/EP94101392 A AS FILTERELEMENT
The invention relates to a gas filter element formed by two juxtaposed layers, which is particularly suited to removing particles entrained in a gas stream.
It is often necessary to purify air in a room or other enclosed space, which is loaded with suspended particles, such as removing paint dust from air in a paint spray booth. Methods and apparatus for cleaning gases for recycling or discharge is an area where a large amount of research has been undertaken and for this purpose numerous filters have been provided. However, these filters are prone to fast clogging of the filter elements.
GB 917669 teaches a gas filter which comprised h~o layers of material which are each folded in a zig-~ag manner. At alternate turning points of the zig-zags of each layer, the two layers are joined. As one layer is of greater area than the othe! layer, chambers are formed between the layers. Openings are provided through each of the layers so that gas passing through the filter is provided with a distorted flow and suspended particles removed.
The present invention seeks to provide a filter element that is cheaper to manufacture and improves upon the filtration proper~ies of the known filters .
According to the present invention, there is provided a gas filter element formed by two juxtaposed layers9 each layer comprising a plurality of zones, each defined by a first pair of fold lines, each zone including openings and intermediate fold lines substantially parallel with the said first pair, wherein the two layers are each deformed along said fold Iines and joined together along contiguous fold lines thereby forming chambers between the layers, characterized in that the two layers are substantially identical in shape and size. `
WO 941289D7 ~9~1 PCT/EI'94101392 The filter element provided by the present invention is far simpler to ~-manufacture, since it is necessary to manufacture only one design of layer. The filter element is subject to low degrees of clogging of the element. Aiso, this filter element provides a high degree of filtration.
Preferably, the cross-section through the chambers i5 substantially a parallelogram. '` ~' , In caees where very high degrees of filtration are required, further layers of material may be attached to the filter to act as further filter elements.
Normally, the layers comprise a substantially rigid material. In one embodiment of the invention the material is paper, treated or untreated.
Alternatively, the material may be a plastics material. -The invention will now be described with reference to the accompanying drawings, in which:
Fig. 1 shows cross-section through a folded layer of a first embodimentof the filter element according to the invention;
Fig. 2 shows a view along the line A-A of Fig. 1;
Fig. 3 sh~ws a front view of a layer from B in Fig. 1; and Fig. 4 shows part of a filter element according to the first embodimentof the invention.
Figures 1 to 3 show a layer 15 of rigid material. The layer 15 is divided into zones by pairs of parallel fold lines 1 and 2. Each zone is sub-divided into two pairs of wall elements 10 and 11 by parallel fold lines 1, 2, 3. Each of the wall elements 10 extends between a fold line 2 and a fold line 3. Each of the wall elements 11 extends between a fold line 1 and a fold line 3. Each wall element 11 contains a plurality of openings 4.
WO 94/28~g7 3 2~ A~9 4 PCTIEP!~4/01392 The layer 15 is folded in a zig-zag manner about each fold line 1 and 2, -forming a concertina-shaped layer 15. The layer is also folded about fold ~ -lines 3. 3'~
.' To form the filter element, as shown in Fig. 4, two substantially identical layers 15 are joined together along each fold line 2 to the opposite fold line 1. The folding of the two layers 15 is in opposite directions with regard to the Y axis. This forms chambers 5 bounded by a wall element 10 and a wall element 11 of each of the two layers 15.
In use, the unpurified air stream enters a chamber ~ of the filtsr element through the openir,gs 4 of one layer 15. Subsequently, the air stream is deflected by wall elements 10, 1 1. The air stream exits, substantially purified, through the openings 4 of the other layer 1~.
As will be appreciated, different designs of the filter element of this inYention can be easily envisaged having more or less individual wall elements defining a chamber. It is essential that a high degree of symmetry be maintained so that the manufacturing process is kept cost efficient.
It should be noted that throughout this specification, the word "fold"means a deformation, and the term "fold line" means a line about which a material is deformed. In alternative manufacturing processes, such as when the filter is made from piastics material, each element may b~
ex~ruded or moulded. The fold lines would then relate to an area about which the element is deformed. It must also be noted that throughout this specification, the word "openings" means "perforations".
The invention relates to a gas filter element formed by two juxtaposed layers, which is particularly suited to removing particles entrained in a gas stream.
It is often necessary to purify air in a room or other enclosed space, which is loaded with suspended particles, such as removing paint dust from air in a paint spray booth. Methods and apparatus for cleaning gases for recycling or discharge is an area where a large amount of research has been undertaken and for this purpose numerous filters have been provided. However, these filters are prone to fast clogging of the filter elements.
GB 917669 teaches a gas filter which comprised h~o layers of material which are each folded in a zig-~ag manner. At alternate turning points of the zig-zags of each layer, the two layers are joined. As one layer is of greater area than the othe! layer, chambers are formed between the layers. Openings are provided through each of the layers so that gas passing through the filter is provided with a distorted flow and suspended particles removed.
The present invention seeks to provide a filter element that is cheaper to manufacture and improves upon the filtration proper~ies of the known filters .
According to the present invention, there is provided a gas filter element formed by two juxtaposed layers9 each layer comprising a plurality of zones, each defined by a first pair of fold lines, each zone including openings and intermediate fold lines substantially parallel with the said first pair, wherein the two layers are each deformed along said fold Iines and joined together along contiguous fold lines thereby forming chambers between the layers, characterized in that the two layers are substantially identical in shape and size. `
WO 941289D7 ~9~1 PCT/EI'94101392 The filter element provided by the present invention is far simpler to ~-manufacture, since it is necessary to manufacture only one design of layer. The filter element is subject to low degrees of clogging of the element. Aiso, this filter element provides a high degree of filtration.
Preferably, the cross-section through the chambers i5 substantially a parallelogram. '` ~' , In caees where very high degrees of filtration are required, further layers of material may be attached to the filter to act as further filter elements.
Normally, the layers comprise a substantially rigid material. In one embodiment of the invention the material is paper, treated or untreated.
Alternatively, the material may be a plastics material. -The invention will now be described with reference to the accompanying drawings, in which:
Fig. 1 shows cross-section through a folded layer of a first embodimentof the filter element according to the invention;
Fig. 2 shows a view along the line A-A of Fig. 1;
Fig. 3 sh~ws a front view of a layer from B in Fig. 1; and Fig. 4 shows part of a filter element according to the first embodimentof the invention.
Figures 1 to 3 show a layer 15 of rigid material. The layer 15 is divided into zones by pairs of parallel fold lines 1 and 2. Each zone is sub-divided into two pairs of wall elements 10 and 11 by parallel fold lines 1, 2, 3. Each of the wall elements 10 extends between a fold line 2 and a fold line 3. Each of the wall elements 11 extends between a fold line 1 and a fold line 3. Each wall element 11 contains a plurality of openings 4.
WO 94/28~g7 3 2~ A~9 4 PCTIEP!~4/01392 The layer 15 is folded in a zig-zag manner about each fold line 1 and 2, -forming a concertina-shaped layer 15. The layer is also folded about fold ~ -lines 3. 3'~
.' To form the filter element, as shown in Fig. 4, two substantially identical layers 15 are joined together along each fold line 2 to the opposite fold line 1. The folding of the two layers 15 is in opposite directions with regard to the Y axis. This forms chambers 5 bounded by a wall element 10 and a wall element 11 of each of the two layers 15.
In use, the unpurified air stream enters a chamber ~ of the filtsr element through the openir,gs 4 of one layer 15. Subsequently, the air stream is deflected by wall elements 10, 1 1. The air stream exits, substantially purified, through the openings 4 of the other layer 1~.
As will be appreciated, different designs of the filter element of this inYention can be easily envisaged having more or less individual wall elements defining a chamber. It is essential that a high degree of symmetry be maintained so that the manufacturing process is kept cost efficient.
It should be noted that throughout this specification, the word "fold"means a deformation, and the term "fold line" means a line about which a material is deformed. In alternative manufacturing processes, such as when the filter is made from piastics material, each element may b~
ex~ruded or moulded. The fold lines would then relate to an area about which the element is deformed. It must also be noted that throughout this specification, the word "openings" means "perforations".
Claims (6)
1. A gas filter element formed by at least two juxtaposed layers, each of said two layers comprising a plurality of zones, each defined by a first pair of fold lines, each zone including openings and intermediate fold lines substantially parallel with the said first pair, wherein the two layers are each deformed along said fold lines and joined together along contiguous fold lines thereby forming chambers between the layers, characterized in that the two layers are substantially identical in shape and size.
2. A gas filter element according to claim 1, wherein the openings are between two intermediate fold lines.
3. A gas filter element according to claim 1 or claim 2, wherein the cross-section through the chambers is substantially a parallelogram.
4. A gas filter element according to anyone of the preceding claims, wherein the layers are made of a substantially rigid material.
5. A gas filter element according to claim 4, wherein the rigid material is treated or untreated paper or a plastics material.
6. A gas filter element according to anyone of the preceding claims, wherein at least one additional layer is attached to said two layers so as to provide at least one further filter element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9311768.7 | 1993-06-08 | ||
| GB939311768A GB9311768D0 (en) | 1993-06-08 | 1993-06-08 | A gas filter element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2141947A1 true CA2141947A1 (en) | 1994-12-22 |
Family
ID=10736789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2141947 Abandoned CA2141947A1 (en) | 1993-06-08 | 1994-05-02 | A gas filter element |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0653954A1 (en) |
| AU (1) | AU6842094A (en) |
| CA (1) | CA2141947A1 (en) |
| GB (1) | GB9311768D0 (en) |
| WO (1) | WO1994028997A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2294212B (en) * | 1995-01-24 | 1997-03-12 | Erhard Charles Andreae | Gas filter element |
| DE202004017413U1 (en) | 2004-11-09 | 2005-01-20 | Big Dutchman International Gmbh | Regenerable filter |
| US8105411B2 (en) | 2008-08-28 | 2012-01-31 | Illinois Tool Works Inc. | Fluid filter system and method |
| DE202014006595U1 (en) | 2014-08-18 | 2015-11-19 | Big Dutchman International Gmbh | Filter element for the separation of particles from a particle-loaded crude gas stream |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL253055A (en) * | 1959-06-24 | |||
| DE2501163A1 (en) * | 1975-01-14 | 1976-07-15 | Werner & Mertz Gmbh | AIR CLEANER TO PLACE ON CONVECTION RADIATOR |
| CH594437A5 (en) * | 1975-12-04 | 1978-01-13 | Erhard Charles Andreae | |
| GB2140707A (en) * | 1983-05-20 | 1984-12-05 | Binks Bullows Ltd | Impingement separator |
| GB8707482D0 (en) * | 1987-03-28 | 1987-04-29 | Bink Bullows Ltd | Gas filter |
-
1993
- 1993-06-08 GB GB939311768A patent/GB9311768D0/en active Pending
-
1994
- 1994-05-02 AU AU68420/94A patent/AU6842094A/en not_active Abandoned
- 1994-05-02 CA CA 2141947 patent/CA2141947A1/en not_active Abandoned
- 1994-05-02 WO PCT/EP1994/001392 patent/WO1994028997A1/en not_active Application Discontinuation
- 1994-05-02 EP EP94916918A patent/EP0653954A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO1994028997A1 (en) | 1994-12-22 |
| AU6842094A (en) | 1995-01-03 |
| GB9311768D0 (en) | 1993-07-28 |
| EP0653954A1 (en) | 1995-05-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |