CA1215913A - Absorption material for filter arrangement - Google Patents
Absorption material for filter arrangementInfo
- Publication number
- CA1215913A CA1215913A CA000430460A CA430460A CA1215913A CA 1215913 A CA1215913 A CA 1215913A CA 000430460 A CA000430460 A CA 000430460A CA 430460 A CA430460 A CA 430460A CA 1215913 A CA1215913 A CA 1215913A
- Authority
- CA
- Canada
- Prior art keywords
- liquid
- foam plastic
- absorption material
- plastic body
- closed cells
- 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
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1669—Cellular material
- B01D39/1676—Cellular material of synthetic origin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
- B01D39/04—Organic material, e.g. cellulose, cotton
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Gas Separation By Absorption (AREA)
- Filtering Materials (AREA)
Abstract
Abstract of the Disclosure A method is disclosed for filtering primarily gaseous media which contain liquid particles or a gas which is converted to a liquid at a drop in temperature. According to the method, the gas is passed through at least one foam plastic body having closed cells, the walls of the closed cells of said at least one body being perforated.
Description
~2~59~3 The present invention relates to absorption material for a filter arrangement.' The in~ention also concerns a method for filtering primarily gaseous media which contain liquid particl~s or a yas which is converted to a liquid at a drop in temperature.
Suction means are generally used in premises where troublesome gases are formed, these means including a ~ilter to collect constituents which shall not be released to the environment outside said premises. Filters to collect troublesome constituents in the gases are also arranged in front of the outlet openings of material emitting troublesome gases. Carbon particles has hitherto been used to provide such absorption material.
It has been found in practice that such filters with carbon particles are not efficient enough to eliminate liquid particles from flowing gaseous media.
An object of the present invention is to effi-ciently take care of liquid particles in flowing gaseous media. This is achieved by using one or more bodies including closed cells which have been perforated. The bod,ies may suitably consist of foam plastic in which the closed cells have been perforated.
This invention relates to a method for filtering primarily gaseous media which contain liquid particles or a gas which is converted to a liquid at a drop in temperature, comprising passing said gaseous media through an absorption material comprising at least one foam plastic body having closed cells, the walls of the closed cells of said at least one body being perforated, and separating said gaseous media from said liquid contained therein~
A filter may be formed by one or more parallel-epipedic blocks or it may consist of a casing containing a number of smaller bodies of different shape which have b~en eompressed,.
*~
...æ~s~3 ! -la-A ~ilter can also be produced from a body shaped as a mat or strip which is rolled to suitable shape and placed in a casing.
The absorption material in the filter is suitably elastic. In such case the material in the filter can be subjected to compression so that the constituent absorbed from the gaseous medium flowing through the fil-ter can be recovered.
The absorption material in the filter suitably consists of polythene, polypropylene or a copolymer or polythene and metacrylic acid. Further characteristic features of the present invention are revealed in the following claims.
,}.~
.Z~S9~3 The absorbtion material according to the invention invention is pre-~erably manufactured from a polythene granulate whlch ls mlxed with small quantities of powdered additl~es with the obJeot of forming bubbles~ The mixture is fed into the first stage of a two-stage S extruder of ~crew type and is heated to ¢a.200C. The melt obtained is fcd into the seoond extruder stage where the temperature i~ lowered to 100 - 150C and i9 extruded through an annular nozzle. A porous tube is obtained and the tube i3 oooled internally and externally ~ith alr and then cut in longitudinal direction to form a strip of ~oam plastic.
Parallel-eplpedic bodieQ may of course be formed instead of strips.
If parallel-epipedic bodies are produced, they are suitably placed in the frame of a filter arrangementO If a mat is used, however, it must be rolled up, suitably shaped and inserted in a casing which is then placed in a filter arrangement.
According to the invention the mat or parallel-epipedic bodies may also be disintegrated into small particles. A casing i9 then filled with said small particles and placed in a filter arrangement.
A filter arrangement of the type described above functions in the following manner. Gas containing liquid drops is allowed to pass the filter arrangement, ~hereupon the liquid drops are caught by the ab-sorbtion material and, i~ the ~as contains COnQtitUentS which are ¢onverted to liquid at a drop in temperature, the liquid formed in this way will also be absorbed. When the filter arran8ement is saturated~
the absorbtion material is removed and replaced by fresh material. The absorbtion material in the saturated filter is then ~ubjected to com-pression whereupon the material absorbed can be recovered for re-use.
After compressing the ab30rbtion material is once more usable. An absorbtion material has thus been produced which not only absorbs liquid particles, but also enables recovery of theQe particle~ ~o that the material i~ onoe more usable as a filter.
An endless 3trip can be produced ~rom the mat of abQorbtion material mentioned above. This ~trip i9 then allowed to run over two rollerQ~
- ^~
:~2~5~3 one of whioh i9 driving. A strip arranged on roller~ i9 plaoed in a filter arrangement so that a ga~ i9 allowed to flow through one part Or the strip and then a qeoond park of the ~trip. The skrip will thu~
ab~orb liquid partioles whioh oan be reoovered if an additional roller i~ arranged by one o~ the rollers~ presqing agaill~t the ~trip. ~aoh part of the strip will therefore be supplied with eas oontaining liquid partioles on two different oooasion~ and the liquid absorbed i9 then pres~ed out bet,ween the two oooperating roller~.
Suction means are generally used in premises where troublesome gases are formed, these means including a ~ilter to collect constituents which shall not be released to the environment outside said premises. Filters to collect troublesome constituents in the gases are also arranged in front of the outlet openings of material emitting troublesome gases. Carbon particles has hitherto been used to provide such absorption material.
It has been found in practice that such filters with carbon particles are not efficient enough to eliminate liquid particles from flowing gaseous media.
An object of the present invention is to effi-ciently take care of liquid particles in flowing gaseous media. This is achieved by using one or more bodies including closed cells which have been perforated. The bod,ies may suitably consist of foam plastic in which the closed cells have been perforated.
This invention relates to a method for filtering primarily gaseous media which contain liquid particles or a gas which is converted to a liquid at a drop in temperature, comprising passing said gaseous media through an absorption material comprising at least one foam plastic body having closed cells, the walls of the closed cells of said at least one body being perforated, and separating said gaseous media from said liquid contained therein~
A filter may be formed by one or more parallel-epipedic blocks or it may consist of a casing containing a number of smaller bodies of different shape which have b~en eompressed,.
*~
...æ~s~3 ! -la-A ~ilter can also be produced from a body shaped as a mat or strip which is rolled to suitable shape and placed in a casing.
The absorption material in the filter is suitably elastic. In such case the material in the filter can be subjected to compression so that the constituent absorbed from the gaseous medium flowing through the fil-ter can be recovered.
The absorption material in the filter suitably consists of polythene, polypropylene or a copolymer or polythene and metacrylic acid. Further characteristic features of the present invention are revealed in the following claims.
,}.~
.Z~S9~3 The absorbtion material according to the invention invention is pre-~erably manufactured from a polythene granulate whlch ls mlxed with small quantities of powdered additl~es with the obJeot of forming bubbles~ The mixture is fed into the first stage of a two-stage S extruder of ~crew type and is heated to ¢a.200C. The melt obtained is fcd into the seoond extruder stage where the temperature i~ lowered to 100 - 150C and i9 extruded through an annular nozzle. A porous tube is obtained and the tube i3 oooled internally and externally ~ith alr and then cut in longitudinal direction to form a strip of ~oam plastic.
Parallel-eplpedic bodieQ may of course be formed instead of strips.
If parallel-epipedic bodies are produced, they are suitably placed in the frame of a filter arrangementO If a mat is used, however, it must be rolled up, suitably shaped and inserted in a casing which is then placed in a filter arrangement.
According to the invention the mat or parallel-epipedic bodies may also be disintegrated into small particles. A casing i9 then filled with said small particles and placed in a filter arrangement.
A filter arrangement of the type described above functions in the following manner. Gas containing liquid drops is allowed to pass the filter arrangement, ~hereupon the liquid drops are caught by the ab-sorbtion material and, i~ the ~as contains COnQtitUentS which are ¢onverted to liquid at a drop in temperature, the liquid formed in this way will also be absorbed. When the filter arran8ement is saturated~
the absorbtion material is removed and replaced by fresh material. The absorbtion material in the saturated filter is then ~ubjected to com-pression whereupon the material absorbed can be recovered for re-use.
After compressing the ab30rbtion material is once more usable. An absorbtion material has thus been produced which not only absorbs liquid particles, but also enables recovery of theQe particle~ ~o that the material i~ onoe more usable as a filter.
An endless 3trip can be produced ~rom the mat of abQorbtion material mentioned above. This ~trip i9 then allowed to run over two rollerQ~
- ^~
:~2~5~3 one of whioh i9 driving. A strip arranged on roller~ i9 plaoed in a filter arrangement so that a ga~ i9 allowed to flow through one part Or the strip and then a qeoond park of the ~trip. The skrip will thu~
ab~orb liquid partioles whioh oan be reoovered if an additional roller i~ arranged by one o~ the rollers~ presqing agaill~t the ~trip. ~aoh part of the strip will therefore be supplied with eas oontaining liquid partioles on two different oooasion~ and the liquid absorbed i9 then pres~ed out bet,ween the two oooperating roller~.
Claims (7)
1. A method for filtering primarily gaseous media which contain liquid particles or a gas which is converted to a liquid at a drop in temperature, comprising passing said gaseous media through an absorption material comprising at least one foam plastic body having closed cells, the walls of the closed cells of said at least one body being perforated, and separating said gaseous media from said liquid contained therein.
2. Method according to claim 1, wherein said at least one foam plastic body is constructed to be com-pressed so much that said closed cells become at least partially flattened or crumpled.
3. Method according to claim 1, wherein said at least one foam plastic body comprises material selected from the group consisting of polythene, polypropylene, and a copolymer of polythene and methacrylic acid.
4. Method according to claim 1, wherein said at least one foam plastic body is made of an elastic material.
5. Method according to claim 1, additionally comprising the step of compressing said absorption material to remove liquid absorbed therein.
6. Method according to claim 5, wherein said absorption material is compressed by passing said material between rollers.
7. Method according to claim 1, wherein said absorption material comprises a plurality of foam plastic body particles contained in a casing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8204882A SE8204882L (en) | 1982-08-26 | 1982-08-26 | ABSORBTION MATERIAL FOR FILTERING ARRANGEMENTS |
| SE8204882-8 | 1982-08-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1215913A true CA1215913A (en) | 1986-12-30 |
Family
ID=20347629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000430460A Expired CA1215913A (en) | 1982-08-26 | 1983-06-15 | Absorption material for filter arrangement |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0116576A1 (en) |
| JP (1) | JPS59501399A (en) |
| AU (1) | AU1828083A (en) |
| CA (1) | CA1215913A (en) |
| DK (1) | DK181684A (en) |
| FI (1) | FI77992C (en) |
| SE (1) | SE8204882L (en) |
| WO (1) | WO1984000901A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69531163T2 (en) * | 1994-10-04 | 2004-05-19 | Pedersen, Björn | CARRIER MEDIUM FOR RECORDING A BIOFILM FOR PURIFYING WASTE WATER AND METHOD FOR PRODUCING THIS CARRIER MEDIUM |
| US6720362B1 (en) | 1998-09-17 | 2004-04-13 | The Dow Chemical Company | Perforated foams |
| US6541105B1 (en) | 1999-09-16 | 2003-04-01 | Dow Global Technologies Inc. | Acoustical open-cell polylefins and process for making |
| EP1276796B1 (en) | 2000-03-17 | 2006-04-12 | Dow Global Technologies Inc. | Macrocellular polyolefin foam having a high service temperature for acoustical applications |
| MXPA02008938A (en) | 2000-03-17 | 2003-06-17 | Dow Global Technologies Inc | Polyolefin foam useful for sound and thermal insulation. |
| AU3820001A (en) | 2000-03-17 | 2001-10-03 | Dow Chemical Co | Acoustic absorption polymer foam having improved thermal insulating performance |
| GB0307397D0 (en) * | 2003-03-31 | 2003-05-07 | Selsdon Leslie D | A filter |
| JP6445229B2 (en) * | 2013-01-31 | 2018-12-26 | 株式会社タムラ製作所 | Reflow device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2961710A (en) * | 1957-01-04 | 1960-11-29 | Norman H Stark | Method for making a foamed polyurethane filter |
| JPS4866264A (en) * | 1971-12-14 | 1973-09-11 | ||
| GB1567645A (en) * | 1975-10-06 | 1980-05-21 | Scott Paper Co | Foam filter |
| DE2927287B2 (en) * | 1979-07-06 | 1981-05-21 | HELSA - Werke Helmut Sandler & Co, 8586 Gefrees | Multi-layer filter material with at least one layer of open-cell foam |
-
1982
- 1982-08-26 SE SE8204882A patent/SE8204882L/en unknown
-
1983
- 1983-06-15 CA CA000430460A patent/CA1215913A/en not_active Expired
- 1983-07-18 WO PCT/SE1983/000283 patent/WO1984000901A1/en active IP Right Grant
- 1983-07-18 JP JP50255883A patent/JPS59501399A/en active Pending
- 1983-07-18 AU AU18280/83A patent/AU1828083A/en not_active Abandoned
- 1983-07-18 EP EP19830902464 patent/EP0116576A1/en not_active Ceased
-
1984
- 1984-04-06 DK DK181684A patent/DK181684A/en not_active Application Discontinuation
- 1984-04-11 FI FI841428A patent/FI77992C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| WO1984000901A1 (en) | 1984-03-15 |
| AU1828083A (en) | 1984-03-29 |
| EP0116576A1 (en) | 1984-08-29 |
| DK181684D0 (en) | 1984-04-06 |
| FI841428A0 (en) | 1984-04-11 |
| SE8204882L (en) | 1984-02-27 |
| DK181684A (en) | 1984-04-06 |
| JPS59501399A (en) | 1984-08-09 |
| SE8204882D0 (en) | 1982-08-26 |
| FI77992C (en) | 1989-06-12 |
| FI77992B (en) | 1989-02-28 |
| FI841428A (en) | 1984-04-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |