WO2000023173A1 - Dispositif pour la filtration de gaz - Google Patents
Dispositif pour la filtration de gaz Download PDFInfo
- Publication number
- WO2000023173A1 WO2000023173A1 PCT/FR1999/002523 FR9902523W WO0023173A1 WO 2000023173 A1 WO2000023173 A1 WO 2000023173A1 FR 9902523 W FR9902523 W FR 9902523W WO 0023173 A1 WO0023173 A1 WO 0023173A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- filter
- liquid
- filtration
- suction
- Prior art date
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
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
Definitions
- the present invention relates to the field of filtration of gases including air.
- gases including air.
- vacuum cleaners for household or industrial work air filtration for industrial or surgical clean rooms, air purification for forced ventilation or air conditioning ...
- the filtration devices essentially consist of mechanical systems comprising at least one microporous filter separating the solid particles from the gaseous medium.
- the patent GB1303250 relates to a filtering assembly whose particle capture process is different from the invention.
- the particles are captured by impact of the particles on rotating fibers.
- the basis of the process consists in obtaining the greatest possible number of shocks between particles and fibers in rotation. Its effectiveness of the process is a function of the number of shocks, a number which must be optimized.
- This patent discusses the problems posed by the attachment of particles to filaments and proposes as a solution to give the fibers, charged collect by impact particles, complex curved cylindrical-conical shapes.
- the method used in this patent has drawbacks, in particular the explosion of the water drops sprayed to wash the fibers. The sprayed liquid is only used to wash the fibers and not to fix particles or dissolve gases.
- Application WO 9741943 relates to a filter made of brushes or a conventional filter washed with a cleaning solution. Liquid is sprayed or not in the gas depending on the degree of dryness of the gas to be treated. It is the degree of dryness of the gas to be treated which determines whether water is sprayed into the gas to be filtered. This spraying is incidental and dependent on conditions.
- Application WO97 / 44117 describes a gas purification system which uses a rotating body of complex structure which makes it possible to create a large contact surface between a liquid film and the polluted gas. Spraying serves only to create the contact film between polluted gas and a liquid which is then centrifuged. This process has the limitations of conventional filters with regard to the size of the particles to be captured. Large particles clog it which can be avoided by increasing the section of the tubes but the capture efficiency of small particles is then reduced.
- the devices of the prior art use water to wash conventional filters or increase air / gas contact by spreading a liquid film on more or less complex surfaces.
- this filtration method requires the use of successive increasingly fine filters in order to be able to stop particles of different sizes and these filters must often be supplemented by, for example, electrostatic filters to stop the finest particles.
- the succession of filters obstructs the flow of the treated gas.
- the more particles have stopped the filters the more they obstruct the flow of gas to be treated which causes clogging of the filters and requires frequent replacement or cleaning to keep the filtration performance acceptable.
- the materials separated from the filtered gas remain pulverulent and inconvenient to handle, which often requires treatment of the dust and waste collected.
- These separate materials are bulky and quickly fill the device intended to receive them, while clogging it if it is a filter, as may be the case for a household vacuum cleaner.
- these current filters are ill-suited for the filtration of very small particles, or in very low concentration, or for the filtration of gases highly charged with smoke, particles or dust.
- these filters do not have the capacity to eliminate undesirable or toxic gases mixed with, for example, air to be purified.
- the aim of the present invention is to propose a new solution for filtering gases, including air, overcoming these drawbacks.
- the invention relates in its most general sense to a process and a device for filtering gases using the separation of the liquid and gaseous phases.
- the gas to be treated is sucked in by suction means such as a propeller which rotates in the opposite direction to the adsorbent mass.
- An adsorbent mist is added to the incoming flow to be treated by a mist generator.
- the gas is mixed with the adsorbent mist and travels along a "gas path".
- the adsorbent / gas mist mixture passes through a rotating adsorbent structure and then the treated gas is discharged through the outlet.
- the reformed liquid, and what it has fixed, is evacuated, possibly treated and recycled ...
- the invention uses the adsorption phenomenon which consists of the accumulation of a substance at the interface between two phases (gas / liquid or liquid / liquid for example). It comes from intermolecular attraction forces, of various nature and intensity, which are responsible for the cohesion of the condensed phases, liquid or solid. A molecule attracted unequally by the other molecules of two phases will find an energetically favorable position on the surface of the phase which most attracts it; this will be called the adsorbent. The molecules thus adsorbed constitute the adsorbate. If the energetic or kinetic conditions allow the molecule to penetrate within the adsorbent phase, there is absorption. Absorption is a phenomenon of penetration with fixation of molecules in an absorbent medium.
- Each step of the treatment can be done in different ways.
- the adsorbent mist is most simply obtained from water. It can also be obtained from liquid fatty substances, solvents, various chemical solutions.
- the droplet diameters may vary depending on the application.
- the type of liquid sprayed can vary as required.
- a spray of larger drops can be added to the mist, which coalesce the droplets of the water for the first time.
- the mist generator can be a sprinkler, an ultrasonic system, etc. It is possible to add various chemicals, in particular detergents, amphiphylic substances (hydophyls and lipophyls) to the liquid used to make the mist. Electrical, electrostatic, thermal, light and pressure means can be added at this stage of the process.
- a linear gas path is the simplest and may be sufficient.
- the rotary adsorbent structure can be produced according to numerous methods depending on the applications of the process.
- the simplest structure consists of a more or less thick disc of natural or synthetic microfibers organized in a sufficiently loose network not to slow down too much the gases to be treated and sufficiently dense or thick to completely adsorb the fog and what it has captured or what he set out to do.
- adsorbent structures can be used such as, for example, blades or rotary fins adsorbent in themselves or covered with adsorbent substances.
- Certain materials such as polypropylene can advantageously be used given their capacity for simultaneous adsorption and absorption.
- All materials with a high adsorption capacity can be used, such as fibers, or open cell foams, natural or synthetic, certain ceramics having a favorable mass / surface ratio, catalytic ceramics, zeolites, graphite, lamellar halides, aerogels ...
- the desorbent liquids can be different from the liquid (s) used to create the adsorbent mist. It is possible to add to the disc-shaped rotary structure one or more peripheral rings of adsorbent materials which may be different from those of the central adsorbent material.
- a final treatment can be added by the methods above or any other method.
- the liquid effluents can then undergo a simple evacuation of the used liquids, recycling with or without treatment until partial or complete wear.
- a treatment before reinjection can consist of all the possible modes of treatment of liquids.
- a device for the filtration of gas comprising a microporous adsorbent filter or adsorbent microfibrous filter and means for forcing a flow of air between a suction mouth and a filtered air outlet mouth characterized in that it comprises means for spraying a liquid and centrifugal means placed between the spraying means and the filtered gas outlet mouth.
- the particles wetted by the sprayer are blocked by the internal rotary adsorbent filter and ejected with the carrier liquid to an external receptacle.
- this receptacle can contain a peripheral filter, concentric with the first which blocks said particles. At this point, the particles compact, out of the way of the gas. Filtration is thus carried out outside the air flow and perpendicular to the direction of flow progression. It does not obstruct its circulation and the eliminated detritus remains outside the flow.
- This device can advantageously include electrical biasing means applicable upstream of the suction mouth, at the level of the spraying of the liquid and at the level of the centrifugal means.
- Such a device makes it possible to remedy the drawbacks of filters of the prior art, by reducing the pressure losses of the gas flow during use and by ensuring an almost constant maintenance of the filtration qualities, whatever the quantity of gas previously filtered.
- this new device allows the simultaneous elimination, in a single pass of the gas to be purified, of very diverse substances such as, for example, a mixture of air carrying toxic gases, fumes, dust, detritus and micro particles carried by air.
- the sprayed liquid increases the mass of the transported substances or fixes or modifies them and thus makes it possible to centrifuge bodies for which centrifugation alone would have been ineffective or very difficult.
- the centrifugal means comprise a microporous or microfibrous adsorbent filter, hydrophilic or not, electrically conductive or not, of cylindrical shape.
- the device according to the invention comprises means coaxial with the microporous or microfibrous adsorbent filter for the peripheral collection of liquid effluents transporting the substances to be eliminated.
- the device according to the invention comprises front suction means for the suction of the mixture of gas and liquid sprayed by the upstream front face of the filter.
- the device according to the invention comprises peripheral suction means for sucking the mixture of gas and liquid sprayed by the radial face of the filter.
- the device according to the invention comprises central suction means for the suction of the mixture of gas and liquid sprayed by an axial surface of the filter.
- the liquid is either put into the form of a mist, the drops of which have a section of between 0.1 and 60 ⁇ m and preferably between 0.5 and 6 ⁇ m.
- the liquid is sprayed in droplets or in jets of droplets of the order of a millimeter or fractions of a millimeter.
- the liquid is sprayed in a thin sheet to best wet the content of the gas to be purified.
- the device further comprises means for recycling the sprayed liquid.
- the recycling means comprise pulverulent activated carbon impregnated or not with germicidal substances.
- the misting liquid contains a fixing or chemical precipitation reagent.
- the sprayed liquid contains surfactants or a highly hydrophilic soluble substance (CaCl2 for example).
- the filter according to the invention is not a filter in the conventional sense of the term.
- the classic filter stops and retains particles thanks to its mechanical characteristics (pore diameter, meshes ...), even if it is sometimes washed).
- the device according to the invention is essentially a mist associated with a fog ejector fixator.
- the ejector sensor operates by adsorption / local saturation / desorption of fog and does not have the constraints of conventional filters. It is the fog and the "ejector fixer" that filter.
- the method and the device according to the invention make it possible to carry out filtering operations by adding to a gas to be treated a liquid phase in the form of a sprayed liquid followed by recovery by adsorption of the liquid phase added in a single passage of a gas to be purified or treated.
- the method and the device according to the invention exploit in a simple way the complex physicochemical properties of the mists as well as the physicochemical properties of the water droplets or of other misted liquids.
- the advantages of liquid microspheres are manifold. Microspheres of liquids do not need a support like the mobile liquid films in the gas flow to be treated and are not linked to a more or less rigid support and can have fluid and very complex paths favoring interactions with the gas to be treated. They offer a very large gas / liquid contact surface and allow the best use to be made of interface, surface and adsorption phenomena.
- Liquid particles have electrical, electro-chemical and electrostatic properties which very advantageously differentiate them from liquid films or sprays when it comes to fixing micro-particles or even gases.
- the transient fixing capacities of the adsorbent materials joined together in structures which are put in rotation are stronger. These structures are made of microfibers or foams or various substances or supports covered with highly adsorbent materials. What is usually called "filter”, but which is not the system according to the invention, can for example consist of a very loose network of adsorbent microfibers which does not block anything as do filters. We can thus use zeolites; aerogels or catalysts ...
- Centrifugal force can be replaced by other systems, but has the advantage of being easy to use to separate from the temporary fixing mass (microfibers, adsorption ...) the fog and what it has fixed or what to which it is fixed during its mixing with the gas to be treated.
- - Figure 2 shows a sectional view of a second embodiment
- - Figure 3 shows the block diagram of filtration with a peripheral filter.
- FIG. 1 represents a filtration device comprising a housing (1) having a suction mouth (2) on the upstream front face (4) and a filtered air outlet (3) on the opposite front face (5).
- the device comprises a cylindrical filter (6) driven in rotation by an electric motor.
- the filter consists of a microporous material, for example a block of agglomerated fibers or a porous solid material.
- injection nozzles (18) spray a liquid in the form of micro-droplets having an average diameter of the order of a micron.
- the misting liquid can consist of pure water or water containing one or more additives such as:
- the misting liquid can also consist of other liquids such as oils or alcoholic derivatives.
- Water or misting liquid is sprayed into the incoming air stream.
- the solid particles are fixed by micro-droplets which are sucked into the rotary filter (6).
- the rotary filter (6) drives the charged or uncharged droplets towards a peripheral receptacle (8) containing a rotary peripheral filter under the effect of centrifugal force.
- a discharge pipe (9) drives the liquid effluents to a recovery tank (10). Liquid effluents can optionally be reprocessed and then recycled to be reinjected into the intake chamber (7).
- an axial duct (11) allows the radial injection, through a perforated axis, of an additional liquid increasing the flow of liquid inside the filter (6).
- Figure 2 shows an alternative embodiment
- the device consists of a lenticular housing (1). It includes an axial suction mouth (2) and an axial discharge mouth (3).
- the misting liquid is injected into the intake chamber (7) by one or more axial nozzles (13) oriented in the direction of the suction mouth (2).
- the flow of misted liquid is thus oriented in the opposite direction to the flow of air to be treated, which increases the useful path where collisions take place between the liquid droplets and the particles to be filtered.
- the mist thus formed is then sucked through the filter (6) in a radial direction, until an axial discharge by the discharge mouth (3).
- FIG. 3 represents the basic diagram of filtration with a peripheral filter which can be installed in all the variant embodiments.
- the apparatus is a conduit with a gas displacement system and a liquid spraying system (21).
- a mass of finely porous air permeable material fixes the droplets produced by the spray system (21) as well as what they transport, what they have wetted or what they have attached to.
- This mass of permeable material (24) is rapidly rotating and projects everything that it has temporarily fixed radially.
- a rotary filter (22) peripheral to the permeable material (24) retains and compacts the effect of the centrifugal force, the solid materials (23) while letting through the liquid injected by the spraying system (21) and collected temporarily by the permeable material (24). The liquid is then, with or without treatment, returned to the spraying system
- the material, shape, surface and surface shape of the peripheral filter (22) take account of the following unusual facts:
- the materials to be filtered are wetted and subjected to high pressure due to the centrifugal force; due to the packing due to the wetting effect and to that of the centrifugal force, the peripheral filter (22) must collect and keep a quantity of material much less bulky (important advantage) but much more important than do the filters classics.
- the texture, shape, pore size and thickness of the rotary peripheral filter (22) are variable, adapted and optimized for each use. It is possible to apply the electrical, electrostatic or electrochemical phenomena mentioned elsewhere in this text. For example, a simple sheet of conventional laboratory filter paper makes it possible to collect household dust very well, which is transformed into a kind of felt whose handling poses no problem.
- the invention is described by way of nonlimiting example. Many alternative embodiments can be envisaged, in particular as regards the structure of the rotary filter, the drive mechanisms, the structure of the intake chamber, and the misting means, as well as the electrical polarization and the use. an electric or electrostatic polarization of the mists, the relative filters and the incoming flows.
- the addition of a new phase in a gas / particle mixture makes it very simply separable from the phases which are usually difficult to dissociate.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtering Materials (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99947593A EP1124621A1 (fr) | 1998-10-16 | 1999-10-15 | Dispositif pour la filtration de gaz |
US09/807,382 US6627166B1 (en) | 1998-10-16 | 1999-10-15 | Gas filtering device |
AU60983/99A AU6098399A (en) | 1998-10-16 | 1999-10-15 | Gas filtering device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR98/13099 | 1998-10-16 | ||
FR9813099A FR2784607B1 (fr) | 1998-10-16 | 1998-10-16 | Filtration de gaz par force centrifuge |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000023173A1 true WO2000023173A1 (fr) | 2000-04-27 |
Family
ID=9531744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/002523 WO2000023173A1 (fr) | 1998-10-16 | 1999-10-15 | Dispositif pour la filtration de gaz |
Country Status (5)
Country | Link |
---|---|
US (1) | US6627166B1 (fr) |
EP (1) | EP1124621A1 (fr) |
AU (1) | AU6098399A (fr) |
FR (1) | FR2784607B1 (fr) |
WO (1) | WO2000023173A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2839981A1 (fr) * | 2002-07-31 | 2003-11-28 | Air Liquide | Procede de determination de l'aptitude d'un dispositif capable de pieger des partitudes viables et reviviscentes, a determiner la qualite microbiologique d'un gaz ou d'un melange de gaz sous pression |
US8287247B2 (en) | 2009-03-17 | 2012-10-16 | Saes Getters S.P.A. | Combined pumping system comprising a getter pump and an ion pump |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6080219A (en) * | 1998-05-08 | 2000-06-27 | Mott Metallurgical Corporation | Composite porous media |
JP2001120933A (ja) * | 1999-10-28 | 2001-05-08 | Kankyo Co Ltd | 空気清浄方法及び装置並びに加湿方法及び装置 |
DE10148000A1 (de) * | 2001-09-28 | 2003-04-10 | Rolls Royce Deutschland | Ölseparator |
JP2003144826A (ja) * | 2001-11-09 | 2003-05-20 | Ebara Corp | ファンスクラバー |
US7282086B2 (en) * | 2003-07-16 | 2007-10-16 | Jeffery Allen Stuckey | Fluid filter cleaning apparatus |
SE526815C2 (sv) * | 2004-03-16 | 2005-11-08 | 3Nine Ab | Anordning och förfarande för rengöring av en centrifugalseparator |
US7402798B2 (en) * | 2005-01-18 | 2008-07-22 | Phoenix S&T, Inc. | Apparatus and method for controlling an electrostatically induced liquid spray |
US7763848B2 (en) * | 2005-01-18 | 2010-07-27 | Phoenix S&T, Inc. | Apparatus and method for controlling an electrostatically induced liquid spray |
EP1743562B1 (fr) * | 2005-07-13 | 2011-09-28 | Toshiba TEC Kabushiki Kaisha | Aspirateur électrique |
GB2433041A (en) * | 2005-12-08 | 2007-06-13 | Eminox Ltd | Cleaning a vehicle exhaust system filter |
US7389652B1 (en) * | 2006-10-21 | 2008-06-24 | Shields Fair | Heat transfer apparatus |
GB2448548A (en) * | 2007-04-21 | 2008-10-22 | Converteam Ltd | Vortex cleaning of air intake of electrical machine |
SE531722C2 (sv) * | 2007-08-28 | 2009-07-21 | Alfa Laval Tumba Ab | Centrifugalseparator och förfarande för rening av en gas |
WO2009052144A2 (fr) * | 2007-10-16 | 2009-04-23 | Phoenix S & T, Inc. | Dispositif à buse microfluidique intégré pour la préparation d'échantillons par chromatographie pour applications de spectrométrie de masse |
WO2009108538A2 (fr) * | 2008-02-26 | 2009-09-03 | Phoenix S & T, Inc. | Procédé et appareil permettant d’accroître la capacité de la chromatographie en phase liquide et de la spectrométrie de masse |
NO330124B1 (no) * | 2009-06-11 | 2011-02-21 | Ntnu Tech Transfer As | En separator for en gass/væske strøm |
US20110131937A1 (en) * | 2009-12-08 | 2011-06-09 | Yang Hsien Ming | absorptive device to carbon dioxide in the air |
EP2463008A1 (fr) | 2010-12-10 | 2012-06-13 | NTNU Technology Transfer AS | Séparateur permettant de séparer un écoulement de fluide de gaz avec une phase dispersée |
CN102423590A (zh) * | 2011-07-19 | 2012-04-25 | 吴江市新吴纺织有限公司 | 自动吸尘机构 |
EP2574389B1 (fr) | 2011-09-29 | 2022-09-28 | Alfa Laval Corporate AB | Dispositif comprenant un séparateur centrifuge et un procédé pour nettoyer un gaz |
DE102012220186A1 (de) * | 2012-11-06 | 2014-05-08 | Efficient Energy Gmbh | Tropfenabscheider und Verdampfer |
DK3511054T3 (da) | 2013-03-15 | 2020-11-09 | Oy Halton Group Ltd | Røgrensning med vandspray og efterspørgselsstyret drift |
CN103357235B (zh) * | 2013-07-23 | 2015-05-13 | 国电科学技术研究院 | 多污染物联合控制装置 |
US10668428B2 (en) * | 2016-08-24 | 2020-06-02 | Honeywell International Inc. | Apparatus and methods for enhancing gas-liquid contact/separation |
ES2677608B1 (es) * | 2017-02-03 | 2019-08-20 | Desenvolupament Innovacio I Recerca Aplicada S L | Sistema de depuración de gases y aire |
WO2020195421A1 (fr) * | 2019-03-28 | 2020-10-01 | パナソニックIpマネジメント株式会社 | Dispositif de piégeage de microparticules |
CN110694358A (zh) * | 2019-09-04 | 2020-01-17 | 徐州易尔环保科技有限公司 | 一种车间废气处理系统 |
CN112973295B (zh) * | 2021-03-18 | 2022-03-29 | 中国石油大学(北京) | 具有排液功能的聚结滤芯 |
CN114225596B (zh) * | 2021-12-31 | 2023-03-10 | 中海外交通建设有限公司 | 一种用于建筑工程施工的粉尘收集装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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GB1303250A (fr) * | 1969-09-17 | 1973-01-17 | ||
GB1356866A (en) * | 1972-04-27 | 1974-06-19 | Schwarz Holywell Ltd | Filters for removing airborne dust |
DE8905182U1 (de) * | 1989-04-17 | 1989-08-10 | Schmitz, Hugo, 4720 Beckum | Einrichtung zur Reinigung von Gasen |
GB2279271A (en) * | 1992-06-16 | 1995-01-04 | Wagner Mining & Constr | Exhaust gas scrubber and filter assembly |
WO1997041943A1 (fr) * | 1996-05-06 | 1997-11-13 | Moon Chan Park | Appareil et procede pour purifier un gaz d'echappement |
WO1997044117A1 (fr) * | 1996-05-17 | 1997-11-27 | Romico Hold A.V.V. | Separateur de particules rotatif |
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US5112369A (en) * | 1991-10-02 | 1992-05-12 | Allied-Signal Inc. | Method of applying a wettant to a filtering media |
US5536298A (en) * | 1995-02-24 | 1996-07-16 | Awaji; Toshio | Method of treating fine particle dust in manufacturing process of semiconductor elements and apparatus therefor |
US6251168B1 (en) * | 1999-07-23 | 2001-06-26 | Hudson Products Corporation | High efficiency gas scrubber using combined coalescing media and centrifugal cyclone |
US6451093B1 (en) * | 2001-01-22 | 2002-09-17 | Charles C. Miles | Centripetal demister |
-
1998
- 1998-10-16 FR FR9813099A patent/FR2784607B1/fr not_active Expired - Lifetime
-
1999
- 1999-10-15 WO PCT/FR1999/002523 patent/WO2000023173A1/fr not_active Application Discontinuation
- 1999-10-15 AU AU60983/99A patent/AU6098399A/en not_active Abandoned
- 1999-10-15 EP EP99947593A patent/EP1124621A1/fr not_active Withdrawn
- 1999-10-15 US US09/807,382 patent/US6627166B1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1303250A (fr) * | 1969-09-17 | 1973-01-17 | ||
GB1356866A (en) * | 1972-04-27 | 1974-06-19 | Schwarz Holywell Ltd | Filters for removing airborne dust |
DE8905182U1 (de) * | 1989-04-17 | 1989-08-10 | Schmitz, Hugo, 4720 Beckum | Einrichtung zur Reinigung von Gasen |
GB2279271A (en) * | 1992-06-16 | 1995-01-04 | Wagner Mining & Constr | Exhaust gas scrubber and filter assembly |
WO1997041943A1 (fr) * | 1996-05-06 | 1997-11-13 | Moon Chan Park | Appareil et procede pour purifier un gaz d'echappement |
WO1997044117A1 (fr) * | 1996-05-17 | 1997-11-27 | Romico Hold A.V.V. | Separateur de particules rotatif |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2839981A1 (fr) * | 2002-07-31 | 2003-11-28 | Air Liquide | Procede de determination de l'aptitude d'un dispositif capable de pieger des partitudes viables et reviviscentes, a determiner la qualite microbiologique d'un gaz ou d'un melange de gaz sous pression |
US8287247B2 (en) | 2009-03-17 | 2012-10-16 | Saes Getters S.P.A. | Combined pumping system comprising a getter pump and an ion pump |
Also Published As
Publication number | Publication date |
---|---|
US6627166B1 (en) | 2003-09-30 |
FR2784607A1 (fr) | 2000-04-21 |
AU6098399A (en) | 2000-05-08 |
EP1124621A1 (fr) | 2001-08-22 |
FR2784607B1 (fr) | 2001-02-09 |
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