CA1081138A - Assymetrical mechanical filter - Google Patents
Assymetrical mechanical filterInfo
- Publication number
- CA1081138A CA1081138A CA276,516A CA276516A CA1081138A CA 1081138 A CA1081138 A CA 1081138A CA 276516 A CA276516 A CA 276516A CA 1081138 A CA1081138 A CA 1081138A
- Authority
- CA
- Canada
- Prior art keywords
- filter
- foil
- filter medium
- mechanical
- constructed
- 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.)
- Expired
Links
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
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- 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
- B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An assymetrical mechanical filter for filtering a fluid and solid particle medium such as dust and air comprising a frame having a folded filter medium disposed within and a plurality of folded, pleated foils construc-ted of rigid planar material disposed between folds of the filter medium so as to space apart the filter medium. The foils have a larger fold between the filter medium layers at the dust inlet side than on the exhaust side of the filter medium so that an improved filtering takes place.
An assymetrical mechanical filter for filtering a fluid and solid particle medium such as dust and air comprising a frame having a folded filter medium disposed within and a plurality of folded, pleated foils construc-ted of rigid planar material disposed between folds of the filter medium so as to space apart the filter medium. The foils have a larger fold between the filter medium layers at the dust inlet side than on the exhaust side of the filter medium so that an improved filtering takes place.
Description
10~1138 The present invention relates to a mechanical filter. More specifically, the present invention relates to a filter which is used in devices and installations for reclaiming powder, or more generally in installations for dust particles.
Known mechanical filters of the above-mentioned types generally use a tape or strip-like filter material such as, for example, filter paper, fiber glass material or the like which is positioned in a folded manner in a box--like frame. Between each layer of the filter material is alternately mounted a folded or pleated foil material at either side of the filter material, so ~s to provide the required distance between the individual filter medium layers. In the known mechanical filters, these folded or pleated foils consist of aluminum, hard paper or plastic material and are provided with an even fold on the dust side as well as on the pure gas side. The folded or pleated foils also act as distance spacers between the individual layers of the filter medium so that equal distances betwPen the filter layers are created.
- It is an object of the subject invention to im-prove the known mechanical filters with respect to their du8t storage and to enable the filters to be cleaned. In the known filters, wherein the distance is optically di-mentioned with respect to the prevailing air speed, it has been shown that the filters become plugged up very rapidly .
. . .
~..
''' ' ~
due to the fact that the cxoss sections of the filter mat-erial are reduced by the dust material flowing therethrough and separated by the filter material.
It is therefore an object of the present inven-tion to provide a mechanical filter of the aforementioned type which is assymetrical and wherein the folded or pleat-ed foil, which acts as a distance spacer between the indi-vidual layers, has a wider and larger fold on the dust side of the filter medium than on the pure gas side.
In accordance with a preferred embodiment of the invention, the ratio between the large fold on the dust side with respect to the smaller fold on the pure gas side is about 2 : 1 to 3 : 1, depending on the type of filter mat-erial used. -The performance of the filter is defined in accordance with the required mechanical-filter material per filter element. In order to maintain the sguare meter di-mension, since this dimension is the optimum for the requir-ed air speed through the filter, the sub~ect invention pro-vides a means for reducing the distance of the individual filter medium layers on the pure side and enlarging the dis-tance on the dust inlet side. This arrangement proYides for - a very substantial advantage in that with the same filter conditions, a substantially increased storage capacity of - the filter is obtained and the cleaning of the filters is - made possible and even improved.
.
Other objects and features of the present inven-tion will become apparent from the following detailed des-cription considered in connection with the accompanying , , ~ -2-10~ 38 drawing which discloses the embodiment of the invention.
It is to be understood, however, that the drawing is de-signed for the purpose of illustration only and not as a definition of the limits of the invention.
In the drawing, wherein similar reference char-acters denote similar elements throughout the several views:
Fig. 1 is a perspective view of a mechanical fil-ter of the invention;
Fig. 2 is an enlarged view of the dust inlet side of the mechanical filter in accordance with the invention;
and Fig. 3 is an enlarged view of the pure gas side of the mechanical filter in accordance with the invention.
Fig. 1 shows an assymetrical filter in accordance with the invention which consists of a box-like frame 1 wherein a folded filter medium 2 is inserted. The filter medium may consis~ of filter paper, fiber glass material or the like. Folded or pleated foils 3 and 3' are inserted : 2b between the individual layers of filter medium 2 which maintain the required distance betwéen the individual layers.
The filter can now be placed into the installation whereby dust containing air is blown onto the filter in the direction of arrow 4 and the clean air exits from the other side of the filter in direction of arrow 5. The dust or the reclaimed powder is col~ected between the folds of foils 3. In the mechanical filter in accordance with the invention, foils 3 on the dust inlet side are provided with ~0 a large fold than foils 3' on the pure gas side. Thus, the individual chambers on the dust inlet side are larger;.
and the distance between the layers of filter medium 2 is .
. , , . . ..... . - ~ .. . - .
~11138 also increased. As can be seen from Fig. 3, the distance - . -- between the individual layer's of the filter medium are' smaller at the pure gas side which is a result of the smaller fold of foils 3'.
Depending on the material to be separated, the ratio between the large fold with respect to the small fold is about 2 : 1 to 3 : 1 for the same square meter ' dimension of the mechani'cal filter ma*erial-per filter element.
10 From the foregoing description, one skilled in the art can easily ascertain the essential characteris-: ' tics of this inventio,n, and without departing from the ' spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various . usages and conditions. Consequently, such changes and . modifications are properly, equitable, and intended to . be, within the'full range of equivalence of the following ' . claims.
,' ~ ' .
'' .
:
.. . ' .
- , !!
Known mechanical filters of the above-mentioned types generally use a tape or strip-like filter material such as, for example, filter paper, fiber glass material or the like which is positioned in a folded manner in a box--like frame. Between each layer of the filter material is alternately mounted a folded or pleated foil material at either side of the filter material, so ~s to provide the required distance between the individual filter medium layers. In the known mechanical filters, these folded or pleated foils consist of aluminum, hard paper or plastic material and are provided with an even fold on the dust side as well as on the pure gas side. The folded or pleated foils also act as distance spacers between the individual layers of the filter medium so that equal distances betwPen the filter layers are created.
- It is an object of the subject invention to im-prove the known mechanical filters with respect to their du8t storage and to enable the filters to be cleaned. In the known filters, wherein the distance is optically di-mentioned with respect to the prevailing air speed, it has been shown that the filters become plugged up very rapidly .
. . .
~..
''' ' ~
due to the fact that the cxoss sections of the filter mat-erial are reduced by the dust material flowing therethrough and separated by the filter material.
It is therefore an object of the present inven-tion to provide a mechanical filter of the aforementioned type which is assymetrical and wherein the folded or pleat-ed foil, which acts as a distance spacer between the indi-vidual layers, has a wider and larger fold on the dust side of the filter medium than on the pure gas side.
In accordance with a preferred embodiment of the invention, the ratio between the large fold on the dust side with respect to the smaller fold on the pure gas side is about 2 : 1 to 3 : 1, depending on the type of filter mat-erial used. -The performance of the filter is defined in accordance with the required mechanical-filter material per filter element. In order to maintain the sguare meter di-mension, since this dimension is the optimum for the requir-ed air speed through the filter, the sub~ect invention pro-vides a means for reducing the distance of the individual filter medium layers on the pure side and enlarging the dis-tance on the dust inlet side. This arrangement proYides for - a very substantial advantage in that with the same filter conditions, a substantially increased storage capacity of - the filter is obtained and the cleaning of the filters is - made possible and even improved.
.
Other objects and features of the present inven-tion will become apparent from the following detailed des-cription considered in connection with the accompanying , , ~ -2-10~ 38 drawing which discloses the embodiment of the invention.
It is to be understood, however, that the drawing is de-signed for the purpose of illustration only and not as a definition of the limits of the invention.
In the drawing, wherein similar reference char-acters denote similar elements throughout the several views:
Fig. 1 is a perspective view of a mechanical fil-ter of the invention;
Fig. 2 is an enlarged view of the dust inlet side of the mechanical filter in accordance with the invention;
and Fig. 3 is an enlarged view of the pure gas side of the mechanical filter in accordance with the invention.
Fig. 1 shows an assymetrical filter in accordance with the invention which consists of a box-like frame 1 wherein a folded filter medium 2 is inserted. The filter medium may consis~ of filter paper, fiber glass material or the like. Folded or pleated foils 3 and 3' are inserted : 2b between the individual layers of filter medium 2 which maintain the required distance betwéen the individual layers.
The filter can now be placed into the installation whereby dust containing air is blown onto the filter in the direction of arrow 4 and the clean air exits from the other side of the filter in direction of arrow 5. The dust or the reclaimed powder is col~ected between the folds of foils 3. In the mechanical filter in accordance with the invention, foils 3 on the dust inlet side are provided with ~0 a large fold than foils 3' on the pure gas side. Thus, the individual chambers on the dust inlet side are larger;.
and the distance between the layers of filter medium 2 is .
. , , . . ..... . - ~ .. . - .
~11138 also increased. As can be seen from Fig. 3, the distance - . -- between the individual layer's of the filter medium are' smaller at the pure gas side which is a result of the smaller fold of foils 3'.
Depending on the material to be separated, the ratio between the large fold with respect to the small fold is about 2 : 1 to 3 : 1 for the same square meter ' dimension of the mechani'cal filter ma*erial-per filter element.
10 From the foregoing description, one skilled in the art can easily ascertain the essential characteris-: ' tics of this inventio,n, and without departing from the ' spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various . usages and conditions. Consequently, such changes and . modifications are properly, equitable, and intended to . be, within the'full range of equivalence of the following ' . claims.
,' ~ ' .
'' .
:
.. . ' .
- , !!
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An assymetrical mechanical filter for filtering and reclaiming powdery material and dust from a gaseous medium, comprising:
a hollow box-like frame;
a sheet-like, reversely-folded filter medium mounted within said box-like frame, said reversly-folded filter medium having a plurality of parallel leaves defining therebetween at least one pair of alternately-arranged, adjacent generally U-shaped channels, one of which opens onto the inlet side of said filter and the other of which opens onto the discharge side of said filter; and a plurality of elongated, pleated spacer foils constructed of rigid material, each of which is disposed in one of said channels defined by said filter medium, with the foil disposed in said channel opening on the inlet side of said filter having a constant and relatively large pleat height and the foil disposed in said channel opening onto said outlet side of said filter having a constant and relatively short pleat height.
a hollow box-like frame;
a sheet-like, reversely-folded filter medium mounted within said box-like frame, said reversly-folded filter medium having a plurality of parallel leaves defining therebetween at least one pair of alternately-arranged, adjacent generally U-shaped channels, one of which opens onto the inlet side of said filter and the other of which opens onto the discharge side of said filter; and a plurality of elongated, pleated spacer foils constructed of rigid material, each of which is disposed in one of said channels defined by said filter medium, with the foil disposed in said channel opening on the inlet side of said filter having a constant and relatively large pleat height and the foil disposed in said channel opening onto said outlet side of said filter having a constant and relatively short pleat height.
2. The assymetrical mechanical filter according to Claim 1, wherein the height ratio of said pleats of said foil in said channel on the inlet side of said filter relative to said pleats of said foil on said exhaust side is between 2:1 and 3:1.
3. The assymetric mechanical filter according to Claim 1, wherein said foil is constructed of aluminum.
4. The assymetric mechanical filter according to Claim 1, wherein said foil is constructed of hard paper.
5. The assymetric mechanical filter according to Claim 1, wherein said foil is constructed of plastic.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2617356A DE2617356B2 (en) | 1976-04-21 | 1976-04-21 | Use of an asymmetrical particulate filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1081138A true CA1081138A (en) | 1980-07-08 |
Family
ID=5975829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA276,516A Expired CA1081138A (en) | 1976-04-21 | 1977-04-20 | Assymetrical mechanical filter |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT362396B (en) |
| CA (1) | CA1081138A (en) |
| CH (1) | CH629677A5 (en) |
| DE (1) | DE2617356B2 (en) |
| FR (1) | FR2348733A1 (en) |
| GB (1) | GB1564872A (en) |
| SE (1) | SE418805B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4537812A (en) * | 1983-06-17 | 1985-08-27 | Cambridge Filter Corporation | Corrugated spacers for pleated air filter media |
| GB2196874A (en) * | 1986-11-01 | 1988-05-11 | Roger Gladding | Filter element |
| DE4015712A1 (en) * | 1990-05-16 | 1991-11-21 | Peter Rapp | FILTER ELEMENT |
| DE10063789A1 (en) * | 2000-12-21 | 2002-06-27 | Mann & Hummel Filter | Filter element for face flow |
| DE202011111047U1 (en) | 2011-06-08 | 2018-10-11 | Neufilter Gmbh | Paper gauze filter module and paper gauze filter module wall of a plurality of such paper gauze filter modules |
| RU169759U1 (en) * | 2016-12-29 | 2017-03-31 | ООО "АэроФильтр" | AEROSOL FILTER |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2952333A (en) * | 1959-03-04 | 1960-09-13 | Flanders Filter Inc | Filters |
| GB1050356A (en) * | 1963-02-28 | |||
| DE1761318A1 (en) * | 1968-05-03 | 1972-03-23 | Delbag Luftfilter Gmbh | Spacers for filter packs |
| US3807150A (en) * | 1972-02-28 | 1974-04-30 | Hepa Corp | Absolute filter pack structure having a toroidal section |
-
1976
- 1976-04-21 DE DE2617356A patent/DE2617356B2/en not_active Ceased
-
1977
- 1977-04-18 SE SE7704375A patent/SE418805B/en not_active IP Right Cessation
- 1977-04-20 FR FR7713436A patent/FR2348733A1/en active Granted
- 1977-04-20 CH CH491177A patent/CH629677A5/en not_active IP Right Cessation
- 1977-04-20 GB GB16329/77A patent/GB1564872A/en not_active Expired
- 1977-04-20 CA CA276,516A patent/CA1081138A/en not_active Expired
- 1977-04-20 AT AT275577A patent/AT362396B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE2617356A1 (en) | 1977-11-03 |
| GB1564872A (en) | 1980-04-16 |
| ATA275577A (en) | 1980-10-15 |
| FR2348733A1 (en) | 1977-11-18 |
| SE7704375L (en) | 1977-10-22 |
| AT362396B (en) | 1981-05-11 |
| DE2617356B2 (en) | 1979-10-04 |
| FR2348733B1 (en) | 1983-05-20 |
| SE418805B (en) | 1981-06-29 |
| CH629677A5 (en) | 1982-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |