CA2022674A1 - Air-cleaning apparatus - Google Patents
Air-cleaning apparatusInfo
- Publication number
- CA2022674A1 CA2022674A1 CA002022674A CA2022674A CA2022674A1 CA 2022674 A1 CA2022674 A1 CA 2022674A1 CA 002022674 A CA002022674 A CA 002022674A CA 2022674 A CA2022674 A CA 2022674A CA 2022674 A1 CA2022674 A1 CA 2022674A1
- Authority
- CA
- Canada
- Prior art keywords
- exhaust
- filtering
- filtering member
- cleaning liquid
- perforations
- 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
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
- Separation Of Particles Using Liquids (AREA)
Abstract
ABSTRACT
The disclosure herein describes an air-cleaning apparatus which comprises a frame support in the form of a rectangular hollow body including a first lateral wall having an inlet adapted for receiving exhaust and a second lateral wall opposite to the first lateral wall having an outlet for expelling cleaned exhaust; at least one filtering member removably inserted between the first and second lateral walls; which has a plurality of suitably dimensioned perforations formed therein, means for supplying a cleaning liquid, said means enabling said cleaning liquid to flow against said filtering member and spread over said perforations; and means for collecting said cleaning liquid. When a stream of the cleaning liquid is spread over the filtering member, a liquid film is effectively formed on the perforations therein, which will efficiently remove any pollutants existing in the exhaust so as to prevent air pollution from resulting therefrom.
The disclosure herein describes an air-cleaning apparatus which comprises a frame support in the form of a rectangular hollow body including a first lateral wall having an inlet adapted for receiving exhaust and a second lateral wall opposite to the first lateral wall having an outlet for expelling cleaned exhaust; at least one filtering member removably inserted between the first and second lateral walls; which has a plurality of suitably dimensioned perforations formed therein, means for supplying a cleaning liquid, said means enabling said cleaning liquid to flow against said filtering member and spread over said perforations; and means for collecting said cleaning liquid. When a stream of the cleaning liquid is spread over the filtering member, a liquid film is effectively formed on the perforations therein, which will efficiently remove any pollutants existing in the exhaust so as to prevent air pollution from resulting therefrom.
Description
2~22~7~
AIR-CLEANING APPARATUS
BACKGROUND OF THE INVENTION
The present invention pertains to an alr-cleaning apparatus and partlcularly, to an apparatus for installation in an exhaust plpe so as to remove undesired particles and gases from the exhaust discharged from said exhaust plpe.
As people become more environment-consclous, the elimlnation of harmful duSt and gases from the exhausts of factories ancl machlnes becomes lncLeaslngly important in orcler to control air pollution ln many developecl countries. Generally, the major source of alr pollutlon is the industrial exhaust discharged from the chimney stacks of factories. The discharged exhaust usually contains a large amount oE dUst and gases capable of destroying the natural atmospheric balance and damaging human health. In order to render such exhaust free from any pollutants, a kind of alr-cleaning apparatus has been developed, the constructlon of which is shown in Flg. 1. The prior art apparatus primarily comprises a tank 11 for removing dust and a tank 12 for removing the harmful gases. The OperatlOn of this apparatus is carried out as follows: the stack exhaust enters into the tank 11 through an lnlet plpe 13 and is sprayed by a water spraylng aevice 14 installed therein whereby the duSt lS removed by the absorption of the falling water droplets; the remalning 2~2~6~
exhaust then enters into the tank 12 through a channel 15 and is sprayed by a mixture spraying device 16 installed therein, the sprayed mixture being directed to a chemical composite existing in the exhaust, e.g., the limewater (calcium carbonate), whlch is capable of reactlng with and eliminating a harmful gaseous sulfide present in the exhaust, whlle the byproduct, e.g., CaSO~
can be recovered as a raw material for use in the production of plaster of Paris. the cleaned exhaust lS
then discharged through an outlet pipe 17 into the atmosphere.
However, in view oE the fact that the downward spréading droplets of water and the chemical mixture cannot contact all of the stack exhaust, it is difficult to entirely remove the dust and the harmful -I- gases from said exhaust by the means of this apparatus.
Moreover, during the cleaning and/or the maintenance of the apparatus of this invention, the operation thereof must be interrupted.
Accordingly, it is a feature of the present invention to provlde an air-cleaning apparatus whlch can effectively remove all of the pollutants exlstlng in the factory or machine exhaust.
Another feature of the present lnventlon is to provide an air-cleaning apparatus whlch can operate continuously whlle performlng cleaning or maintenance procedures thereon.
~22~7~
SUMMARY OF THE INVENTION
Accorcling to the present 1nvention, there lS
provided an air-cleaning apparatus for installation 1n an exhaust pipe to effectively remove the dust and the harmful gases contained in the exhaust discharged therefrom so as to prevent air pollution.
The present apparatus substantially compr1ses a frame support which includes a first lateral wall having an inlet adapted for receiving the exhaust and a l second lateral wa:Ll havlng an outlet for expe.L.Ling the cleanea exhaust; at least one flltering member removabLy inserted between the first and second lateral walls, which has a plurality of suitably dimensioned perforations formed therein, means for supplying a selected cleaning liquid and allowing said cleanlng fluid to flow against the filtering member and spread over the perforations thereof, whereby a llquid film is effectively formed thereon after the cleaninc3 liquid flows over saicd fllterlng member; and means for collecting said cleaning liquic3 flowlng over said filtering member.
Preferably, the fllterlng member comprises a hollow filter frame ancl a fllter membrane with suitably dimensioned perforatlons formed thereln. lore preferably, the filter membrane is composecd of a plurality of membrane layers.
Preferably, the supplying means comprises at 2~2267~
least one first supplying member for feedlny water to the filtering member. More preferably, the supplying means comprises at least one second supplying member for feeding a selectee chemical solution to the filtering member, sald chemical solution belny capable of reacting with a harmful gas existing in the exhaust so as to elimlnate the risk of environmental pollution resulting therefrom.
Moreover, the exhaust pipe, according to the actual needs thereof, can be provided with- a plurality of apparatuses of the present lnventlon, each of which is directed to an individual po:Llutant present in the exhaust, so as to maximlze the cleanilly efEicacy thereof.
].5 BRIEF DESCRIPTION OF THE DRAWINGS
Features and advantages oE the present invention will become apparent from the following detailed description with reference to the accompanylng drawings, in which :
Fig.l is a schematic view illustrating the cleaning process of a prior air-cleaning apparatus;
o Fig.2 is a schematic view showing the construction of a preferrer embodlment in accordance with the present inventlon;
Fig.3 is a schematic top vlew of the preferred embodiment shown in Fig.2;
Fig.4 is a schematic vlew showlny an alr-cleaning an system having two unlts of the embodiments shown ln Fig. 2 connected to an exhaust pipe;
Fig.4A shows a liquid tension fllm formed on a portion of the perforatlons provicled in the filtering member of the preferred embodiment shown in Fig. 2;
Flg.5 is a schematic side view showing a second embodiment in accordance with the present lnvention;
and Fig.6 lS a schematic front view of the second embodiment shown in Fig. 5.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to Figs. 2 and 3, a preEerrecl air-cleaning apparatus of the present invention is shown, which substantially comprises a frame support 20, a plurality of filtering members 30, liquld supplylng means 40 and liquid collecting means 50.
The frame support 20 is substantially ln the form of a rectangular hollow body, comprlsing a flrst lateral wall having an inlet adapted for receiving the exhaust and a second lateral wall opposite to the first lateral wall for expelling the cleanecl exhaust. The rectangular hollow body further comprises two opposlte lateral walls located parallel to the direction of the flow of the exhaust, each of whlch have a plurality of longitudinal ribs 21 disposed in the inner surface thereof. The filterlng member 30 is removably insertecl between the opposite grooves 22 deflned by the ~2~7~
corresponding, opposlte longltud1nal ribs 21 and oriented in a direction transverse to the flow of the exhaust. The frame support further comprises a plurality of top caps 23 for cover1ng the tops of the filtering members 30 interposed therein.
The filterlng member 30 comprises a rectangular hollow filter frame 31 adapted to be interpose between the opposlte grooves 22 and a filter membrane 33 with suitably dimensioned perforations formed thereon. The filter frame 31 is provided wlth recesses 32 and frame rods 34 so as to secure the filter membrane 33 thereon.
Preferably, the filter membrane 33 is composea oE a plurality of membrane layers.
The liquid supplying means 40 is dlsposed on top of the frame support 20 and alternately arranged with the filtering member 30, comprising a supply tube 41 having a row of spraying orifices 42 facing said filtering member 30.
The liquid collecting means 50 is clisposed at the bottom of the frame support 20, comprlslng a collectlng tray 51 to collect the cleaning solution which lS
sprayed by the liquid supplying means 40 and flows over the filter membrane 33. In addltion, the bottoms of the frame support 20 and the filter1ng member 30 are immersed in the liquid retained 1n the collectlng tray 51 .
In operating the embodiment of Fig. 2, the llquid 2~2~7~
supplylng means 40 forces a stream of a selected cleaning solutlon through the spraying oriflces 42 and against the filtering member 30, sald cleanlng solution then spreading over the perforations 331 of the filter membrane 33. A filtering liquid film 332, attr1butable to the liquid tension, is then effectively formed on the filter membrane 33, as shown in Fig. 4A. The fluid film will block and absorb dust and/or the harmful . _ _ ... .. . _ _ _ , _.. . . . , . _.., " . . .
gases existing in the exhaust passlng therethrough ancl the falling droplets carrying the absorbed pollutants wlll be coLlected in the colLectlng tray 51. q`h~
advance ox the exhaust flow can be efflciently enhanced by installing an air compressor in the air-cleaning system of this invention. Finally, the cleaned exhaust can be discharged into the atmosphereO
The cleaning solution to be spread over the filter membrane can merely comprise water for adsorbing dust, or a chemical solutlon capable of reacting with a harmful gas contained in the discharged exhaust so as to eliminate the risk of air pollution resulting therefrom. For example; the cleaning solutlon can be comprised of limewater which is capable of removing a harmful gaseous sulfide such as S02. The resultant CaS0 collected in the collecting tray 51 can be recovered as a raw material for use in the production of plaster of Paris.
In Fig-. 4, which shows an air cleaning system 2~22~7~
having two units of the preferred embodiment of F1g. 2 connected to an an exhaust pipe, it is revealed that the first unit can be adapted for removing aust only.
In this adaptation of the invention, the cleanlng solution to be spread over the filter membrane 33 1S
water. The second unit can be adapted for removing a harmful gas such as S02 and the cleaning solution to be spread can be a corresponding chemical solution such as limewater. The system described above 1S merely a slmple example i11ustrating that the air-cleanlng system, according to the actual needs of the user, may comprise at least two unlts of the embodiment of Fig.
2, each of which is directed to an lndividual pollutant to be removed from the factory or machine exhaust.
The f1lter membrane 33 can be cleaned merely by means of the continuous flowing of the cleaning solution thereover. Regarding the overall cleaning of the system of this invention, the individual filterlng members 30 can be separately removed from the frame support 20 for washing by opening the top cap 23 and washed. Since each of the filtering members 30 of the system of this invention lS independent, the normal operation of the apparatus thereof need not be interrupted during the cleaning, or the maintenance, thereof. Alternatively, the present apparatus can be coupled w1th an ag1tating device so tha. the cleaning of the filtering member 30 may be achieved by ~22~7~ "
agita-tion.
The number of the flltering members 30 and the layers of the filter membLane 33 are variable, depending upon the actual needs of the user. Moreover, the surface area of the flltering membrane 33 is extendable. A second embodiment of the present invention is shown in Figs. 5 and 6, which comprises at least one frame support 60, a plurality of filter membranes 70 including a plurality of membrane layers 71, a l}quld supplying means 80 comprlsing a s~lpply tube 81 having numerous spraying orifices 82 facing the membrane layers 71, and a liquid collecting means 90.
With this invention thus explained, it is apparent that numerous modifications and variations can be made without departing from the scope and spirit of this invention. I-t is therefore intended that this invention be limited only as indlcated in the appended claims.
AIR-CLEANING APPARATUS
BACKGROUND OF THE INVENTION
The present invention pertains to an alr-cleaning apparatus and partlcularly, to an apparatus for installation in an exhaust plpe so as to remove undesired particles and gases from the exhaust discharged from said exhaust plpe.
As people become more environment-consclous, the elimlnation of harmful duSt and gases from the exhausts of factories ancl machlnes becomes lncLeaslngly important in orcler to control air pollution ln many developecl countries. Generally, the major source of alr pollutlon is the industrial exhaust discharged from the chimney stacks of factories. The discharged exhaust usually contains a large amount oE dUst and gases capable of destroying the natural atmospheric balance and damaging human health. In order to render such exhaust free from any pollutants, a kind of alr-cleaning apparatus has been developed, the constructlon of which is shown in Flg. 1. The prior art apparatus primarily comprises a tank 11 for removing dust and a tank 12 for removing the harmful gases. The OperatlOn of this apparatus is carried out as follows: the stack exhaust enters into the tank 11 through an lnlet plpe 13 and is sprayed by a water spraylng aevice 14 installed therein whereby the duSt lS removed by the absorption of the falling water droplets; the remalning 2~2~6~
exhaust then enters into the tank 12 through a channel 15 and is sprayed by a mixture spraying device 16 installed therein, the sprayed mixture being directed to a chemical composite existing in the exhaust, e.g., the limewater (calcium carbonate), whlch is capable of reactlng with and eliminating a harmful gaseous sulfide present in the exhaust, whlle the byproduct, e.g., CaSO~
can be recovered as a raw material for use in the production of plaster of Paris. the cleaned exhaust lS
then discharged through an outlet pipe 17 into the atmosphere.
However, in view oE the fact that the downward spréading droplets of water and the chemical mixture cannot contact all of the stack exhaust, it is difficult to entirely remove the dust and the harmful -I- gases from said exhaust by the means of this apparatus.
Moreover, during the cleaning and/or the maintenance of the apparatus of this invention, the operation thereof must be interrupted.
Accordingly, it is a feature of the present invention to provlde an air-cleaning apparatus whlch can effectively remove all of the pollutants exlstlng in the factory or machine exhaust.
Another feature of the present lnventlon is to provide an air-cleaning apparatus whlch can operate continuously whlle performlng cleaning or maintenance procedures thereon.
~22~7~
SUMMARY OF THE INVENTION
Accorcling to the present 1nvention, there lS
provided an air-cleaning apparatus for installation 1n an exhaust pipe to effectively remove the dust and the harmful gases contained in the exhaust discharged therefrom so as to prevent air pollution.
The present apparatus substantially compr1ses a frame support which includes a first lateral wall having an inlet adapted for receiving the exhaust and a l second lateral wa:Ll havlng an outlet for expe.L.Ling the cleanea exhaust; at least one flltering member removabLy inserted between the first and second lateral walls, which has a plurality of suitably dimensioned perforations formed therein, means for supplying a selected cleaning liquid and allowing said cleanlng fluid to flow against the filtering member and spread over the perforations thereof, whereby a llquid film is effectively formed thereon after the cleaninc3 liquid flows over saicd fllterlng member; and means for collecting said cleaning liquic3 flowlng over said filtering member.
Preferably, the fllterlng member comprises a hollow filter frame ancl a fllter membrane with suitably dimensioned perforatlons formed thereln. lore preferably, the filter membrane is composecd of a plurality of membrane layers.
Preferably, the supplying means comprises at 2~2267~
least one first supplying member for feedlny water to the filtering member. More preferably, the supplying means comprises at least one second supplying member for feeding a selectee chemical solution to the filtering member, sald chemical solution belny capable of reacting with a harmful gas existing in the exhaust so as to elimlnate the risk of environmental pollution resulting therefrom.
Moreover, the exhaust pipe, according to the actual needs thereof, can be provided with- a plurality of apparatuses of the present lnventlon, each of which is directed to an individual po:Llutant present in the exhaust, so as to maximlze the cleanilly efEicacy thereof.
].5 BRIEF DESCRIPTION OF THE DRAWINGS
Features and advantages oE the present invention will become apparent from the following detailed description with reference to the accompanylng drawings, in which :
Fig.l is a schematic view illustrating the cleaning process of a prior air-cleaning apparatus;
o Fig.2 is a schematic view showing the construction of a preferrer embodlment in accordance with the present inventlon;
Fig.3 is a schematic top vlew of the preferred embodiment shown in Fig.2;
Fig.4 is a schematic vlew showlny an alr-cleaning an system having two unlts of the embodiments shown ln Fig. 2 connected to an exhaust pipe;
Fig.4A shows a liquid tension fllm formed on a portion of the perforatlons provicled in the filtering member of the preferred embodiment shown in Fig. 2;
Flg.5 is a schematic side view showing a second embodiment in accordance with the present lnvention;
and Fig.6 lS a schematic front view of the second embodiment shown in Fig. 5.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to Figs. 2 and 3, a preEerrecl air-cleaning apparatus of the present invention is shown, which substantially comprises a frame support 20, a plurality of filtering members 30, liquld supplylng means 40 and liquid collecting means 50.
The frame support 20 is substantially ln the form of a rectangular hollow body, comprlsing a flrst lateral wall having an inlet adapted for receiving the exhaust and a second lateral wall opposite to the first lateral wall for expelling the cleanecl exhaust. The rectangular hollow body further comprises two opposlte lateral walls located parallel to the direction of the flow of the exhaust, each of whlch have a plurality of longitudinal ribs 21 disposed in the inner surface thereof. The filterlng member 30 is removably insertecl between the opposite grooves 22 deflned by the ~2~7~
corresponding, opposlte longltud1nal ribs 21 and oriented in a direction transverse to the flow of the exhaust. The frame support further comprises a plurality of top caps 23 for cover1ng the tops of the filtering members 30 interposed therein.
The filterlng member 30 comprises a rectangular hollow filter frame 31 adapted to be interpose between the opposlte grooves 22 and a filter membrane 33 with suitably dimensioned perforations formed thereon. The filter frame 31 is provided wlth recesses 32 and frame rods 34 so as to secure the filter membrane 33 thereon.
Preferably, the filter membrane 33 is composea oE a plurality of membrane layers.
The liquid supplying means 40 is dlsposed on top of the frame support 20 and alternately arranged with the filtering member 30, comprising a supply tube 41 having a row of spraying orifices 42 facing said filtering member 30.
The liquid collecting means 50 is clisposed at the bottom of the frame support 20, comprlslng a collectlng tray 51 to collect the cleaning solution which lS
sprayed by the liquid supplying means 40 and flows over the filter membrane 33. In addltion, the bottoms of the frame support 20 and the filter1ng member 30 are immersed in the liquid retained 1n the collectlng tray 51 .
In operating the embodiment of Fig. 2, the llquid 2~2~7~
supplylng means 40 forces a stream of a selected cleaning solutlon through the spraying oriflces 42 and against the filtering member 30, sald cleanlng solution then spreading over the perforations 331 of the filter membrane 33. A filtering liquid film 332, attr1butable to the liquid tension, is then effectively formed on the filter membrane 33, as shown in Fig. 4A. The fluid film will block and absorb dust and/or the harmful . _ _ ... .. . _ _ _ , _.. . . . , . _.., " . . .
gases existing in the exhaust passlng therethrough ancl the falling droplets carrying the absorbed pollutants wlll be coLlected in the colLectlng tray 51. q`h~
advance ox the exhaust flow can be efflciently enhanced by installing an air compressor in the air-cleaning system of this invention. Finally, the cleaned exhaust can be discharged into the atmosphereO
The cleaning solution to be spread over the filter membrane can merely comprise water for adsorbing dust, or a chemical solutlon capable of reacting with a harmful gas contained in the discharged exhaust so as to eliminate the risk of air pollution resulting therefrom. For example; the cleaning solutlon can be comprised of limewater which is capable of removing a harmful gaseous sulfide such as S02. The resultant CaS0 collected in the collecting tray 51 can be recovered as a raw material for use in the production of plaster of Paris.
In Fig-. 4, which shows an air cleaning system 2~22~7~
having two units of the preferred embodiment of F1g. 2 connected to an an exhaust pipe, it is revealed that the first unit can be adapted for removing aust only.
In this adaptation of the invention, the cleanlng solution to be spread over the filter membrane 33 1S
water. The second unit can be adapted for removing a harmful gas such as S02 and the cleaning solution to be spread can be a corresponding chemical solution such as limewater. The system described above 1S merely a slmple example i11ustrating that the air-cleanlng system, according to the actual needs of the user, may comprise at least two unlts of the embodiment of Fig.
2, each of which is directed to an lndividual pollutant to be removed from the factory or machine exhaust.
The f1lter membrane 33 can be cleaned merely by means of the continuous flowing of the cleaning solution thereover. Regarding the overall cleaning of the system of this invention, the individual filterlng members 30 can be separately removed from the frame support 20 for washing by opening the top cap 23 and washed. Since each of the filtering members 30 of the system of this invention lS independent, the normal operation of the apparatus thereof need not be interrupted during the cleaning, or the maintenance, thereof. Alternatively, the present apparatus can be coupled w1th an ag1tating device so tha. the cleaning of the filtering member 30 may be achieved by ~22~7~ "
agita-tion.
The number of the flltering members 30 and the layers of the filter membLane 33 are variable, depending upon the actual needs of the user. Moreover, the surface area of the flltering membrane 33 is extendable. A second embodiment of the present invention is shown in Figs. 5 and 6, which comprises at least one frame support 60, a plurality of filter membranes 70 including a plurality of membrane layers 71, a l}quld supplying means 80 comprlsing a s~lpply tube 81 having numerous spraying orifices 82 facing the membrane layers 71, and a liquid collecting means 90.
With this invention thus explained, it is apparent that numerous modifications and variations can be made without departing from the scope and spirit of this invention. I-t is therefore intended that this invention be limited only as indlcated in the appended claims.
Claims (3)
1. An apparatus for removing undesired particles or gases from an exhaust discharged from an exhaust pipe, comprising:
a frame support including a first lateral wall having an inlet adapted for receiving said exhaust, and a second lateral wall opposite to said first lateral wall having an outlet for expelling said exhaust;
a plurality of filtering members each being removably inserted between said first and second lateral walls, each filtering member comprising a hollow peripheral frame having a filter membrane secured thereto, said membrane having a plurality of perforations formed thereon;
said frame support including means for supporting each of said filtering members in substantially parallel spaced relationship whereby each of said filtering members may be removed from said frame support independently of the others of said filtering members;
means for supplying a stream of a cleaning liquid and allowing said stream of cleaning liquid to flow against said filtering member and spread over a major portion of said perforations;
wherein said perforations are dimensioned such that a liquid film is effectively formed thereon after said cleaning liquid flows over said filtering member; and means for collecting said cleaning liquid flowing over said filtering member.
a frame support including a first lateral wall having an inlet adapted for receiving said exhaust, and a second lateral wall opposite to said first lateral wall having an outlet for expelling said exhaust;
a plurality of filtering members each being removably inserted between said first and second lateral walls, each filtering member comprising a hollow peripheral frame having a filter membrane secured thereto, said membrane having a plurality of perforations formed thereon;
said frame support including means for supporting each of said filtering members in substantially parallel spaced relationship whereby each of said filtering members may be removed from said frame support independently of the others of said filtering members;
means for supplying a stream of a cleaning liquid and allowing said stream of cleaning liquid to flow against said filtering member and spread over a major portion of said perforations;
wherein said perforations are dimensioned such that a liquid film is effectively formed thereon after said cleaning liquid flows over said filtering member; and means for collecting said cleaning liquid flowing over said filtering member.
2. An apparatus according to Claim 1 wherein said supplying means comprises at least one first supplying member for feeding water to said filtering member.
3. An apparatus according to Claim 2 wherein said supplying means comprises at least one second supplying member for feeding a chemical solution to said filtering member, said chemical solution being capable of eliminating the danger of environmental pollutions caused by the presence of harmful gases in said exhaust. 4. An apparatus according to Claim 3 wherein said chemical solution is capable of absorbing said harmful gases.
5. An apparatus according to Claim 1 wherein said filtering member comprises a hollow filter frame and a filter membrane formed thereon for accommodating said perforations.
6. An apparatus according to Claim 5 wherein said filter membrane is in the form of a plurality of membrane layers.
7. An apparatus according to Claim 1 wherein said filtering member is oriented in a direction perpendicular to the flowing direction of said exhaust.
5. An apparatus according to Claim 1 wherein said filtering member comprises a hollow filter frame and a filter membrane formed thereon for accommodating said perforations.
6. An apparatus according to Claim 5 wherein said filter membrane is in the form of a plurality of membrane layers.
7. An apparatus according to Claim 1 wherein said filtering member is oriented in a direction perpendicular to the flowing direction of said exhaust.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9016692A GB2246525A (en) | 1990-07-30 | 1990-07-30 | Gas-cleaning apparatus |
| BE9000764A BE1004523A3 (en) | 1990-07-30 | 1990-08-01 | Device air cleaner. |
| CA002022674A CA2022674A1 (en) | 1990-07-02 | 1990-08-03 | Air-cleaning apparatus |
| IT02124490A IT1243703B (en) | 1990-07-30 | 1990-08-08 | AIR PURIFICATION DEVICE |
| FR909010396A FR2665841B1 (en) | 1990-07-30 | 1990-08-16 | AIR PURIFIER. |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE9000674A BE1002189A6 (en) | 1990-07-02 | 1990-07-02 | PROCESS FOR THE PREPARATION OF A POTATO CAKE. |
| GB9016692A GB2246525A (en) | 1990-07-30 | 1990-07-30 | Gas-cleaning apparatus |
| CA002022674A CA2022674A1 (en) | 1990-07-02 | 1990-08-03 | Air-cleaning apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2022674A1 true CA2022674A1 (en) | 1992-02-04 |
Family
ID=27159759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002022674A Abandoned CA2022674A1 (en) | 1990-07-02 | 1990-08-03 | Air-cleaning apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2022674A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109985466A (en) * | 2019-04-26 | 2019-07-09 | 南京贤云机电科技有限公司 | A kind of device that can safely and effectively inhibit dust |
| CN110935262A (en) * | 2019-12-13 | 2020-03-31 | 天津卓宝科技有限公司 | Waste gas treatment equipment and treatment process for waterproof coiled material production workshop |
-
1990
- 1990-08-03 CA CA002022674A patent/CA2022674A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109985466A (en) * | 2019-04-26 | 2019-07-09 | 南京贤云机电科技有限公司 | A kind of device that can safely and effectively inhibit dust |
| CN110935262A (en) * | 2019-12-13 | 2020-03-31 | 天津卓宝科技有限公司 | Waste gas treatment equipment and treatment process for waterproof coiled material production workshop |
| CN110935262B (en) * | 2019-12-13 | 2023-08-15 | 天津卓宝科技有限公司 | Waste gas treatment equipment and treatment process for waterproof coiled material production workshop |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |