EP0663849A1 - Filtre a gaz - Google Patents

Filtre a gaz

Info

Publication number
EP0663849A1
EP0663849A1 EP93920594A EP93920594A EP0663849A1 EP 0663849 A1 EP0663849 A1 EP 0663849A1 EP 93920594 A EP93920594 A EP 93920594A EP 93920594 A EP93920594 A EP 93920594A EP 0663849 A1 EP0663849 A1 EP 0663849A1
Authority
EP
European Patent Office
Prior art keywords
filter
medium
housing
sulphate
filter according
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.)
Withdrawn
Application number
EP93920594A
Other languages
German (de)
English (en)
Other versions
EP0663849A4 (fr
Inventor
Sandor Kapas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AIR SAFE EXHAUST SYSTEMS PTY Ltd
Original Assignee
AIR SAFE EXHAUST SYSTEMS PTY Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AIR SAFE EXHAUST SYSTEMS PTY Ltd filed Critical AIR SAFE EXHAUST SYSTEMS PTY Ltd
Publication of EP0663849A1 publication Critical patent/EP0663849A1/fr
Publication of EP0663849A4 publication Critical patent/EP0663849A4/fr
Withdrawn legal-status Critical Current

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
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2407—Filter candles
    • 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
    • B01D46/0001—Making filtering elements
    • 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
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/003—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid
    • 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
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
    • 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
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/28—Selection of materials for use as drying agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/64—Heavy metals or compounds thereof, e.g. mercury
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/0217—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters the filtering elements having the form of hollow cylindrical bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0228—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being made of foamed rubber or plastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/031—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/30—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for treatment of exhaust gases from IC Engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/14—Combinations of different methods of purification absorption or adsorption, and filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/20—Plastics, e.g. polymers, polyester, polyurethane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/02—Lead
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention in its broadest aspects, relates to filters for the separation of entrained particulate matter from a stream of gas loaded with such matter. It was devised primarily for the filtration of waste gases, such as the exhaust emissions of internal combustion engines, for the purpose of preventing the discharge of atmospheric pollutants therewith, and is described primarily with reference to that application hereinafter. However it will be appreciated that it is applicable to the filtration of gas streams in general.
  • a gas filter element comprising a body of a fibrous or porous filter medium is much more effective at trapping entrained particles in a gas stream when it is newly wet with oil or other tackifying liquid.
  • the trapped particles coat the surface of the medium and shield the liquid from contact with further particles so that the efficiency of the filtration rapidly falls off.
  • an object of the present invention is to provide a gas filter comprising a filter element that presents a wet and tacky surface to the gas stream to be filtered, but which filter does not require a reservoir of liquid for the maintenance of that surface for the effective working life of the filter element.
  • the invention consists in a gas filter comprising a housing, having an inlet port and an outlet port, and at least one filter element, comprising a body of filter medium, within said housing, wherein at least a part of any gas stream entering said housing through said inlet port and leaving said housing through said outlet port is caused to flow through said medium, and wherein a quantity of a hygroscopic salt is adsorbed to the surface of said medium.
  • the housing is adapted to be included as part of an exhaust duct of an internal combustion engine, the filter medium is heat resistant, and the hygroscopic salt is a stable salt, that is to say, as the term "stable" is used herein, the salt in question does not react chemically with the exhaust emissions under the conditions existing in an operating internal combustion engine's exhaust duct.
  • the preferred hygroscopic salt is trisodium phosphate (Na 3 P0 4 ).
  • Lead oxide (PbO) is a particularly noxious atmospheric pollutant released in substantial amounts by engines operating on so called leaded fuel, that is to say fuel containing lead compounds introduced to enhance the octane rating of the fuel.
  • the filter medium of said at least one filter element or more preferably that of a further upstream filter element, holds a second adsorbate which is able to react with the lead oxide and convert it into lead sulphate particles that are readily trapped by said at least one filter element.
  • That second adsorbate may be a duplex sulphate containing one and three valent metallic ions.
  • the preferred sulphate is potassium aluminium sulphate or kalinite (KAI(S0 4 ) 2 ).
  • the invention also extends to exhaust gas filters including only a duplex sulphate adsorbate, in that the mere conversion of the lead oxide in the exhaust emissions to lead sulphate is advantageous, because the substantially insoluble nature of the latter greatly decreases its toxicity.
  • Figure 1 is a longitudinal sectional view of an exhaust gas filter according to the invention.
  • Figure 2 is a cross-sectional view taken on line 2-2 of figure 1 , drawn to a larger scale.
  • Figure 3 is a cross-sectional view taken on line 3-3 of figure 1 , drawn to a larger scale.
  • the illustrated exhaust filter comprises a sheet metal cylindrical housing of circular cross-section, comprising a curved wall 4 and two end walls 5 and 6 respectively.
  • the end wall 5 is pierced by an inlet port surrounded by an inlet spigot 7, and the end wall 6 is pierced by an outlet port surrounded by an outlet spigot 8.
  • the spigots 7 and 8 enable the filter to be installed as part of a motor vehicle's exhaust duct by means of conventional pipe clamps.
  • the housing may be differently proportioned or shaped to suit the overall design of the exhaust system of a vehicle for which it is intended. Frequently this will require it to have an oval cross-section.
  • partition walls 13, 14, 15 and 16 are circular metal plates that may be spot welded directly to the wall 4 or to anchorage lugs thereon, or otherwise conventionally secured in place.
  • the filter elements 9, 10, 11 and 12 may be adhered to the respective partition walls. Alternatively they may be sleeved over and/or within short tubular projections or circular flanges projecting from the respective partition walls.
  • Each of the filter elements 9, 10, 11 and 12 comprises a thick- walled cylinder of a porous ceramic filter medium, such that gas may flow through the medium but smoke sized particles may not.
  • the partition walls 13 and 15 are imperforate except for a ring of holes 17 near their peripheries, whereas the walls 14 and 16 are imperforate except for two relatively larger holes 18 respectively in register with the bores of the filter elements contacting these partition walls.
  • exhaust gas entering the housing through the inlet spigot 7 is caused to flow into the space between end wall 5 and partition wall 13, then through the holes 17 in partition wall 13 into the space between that wall and partition wall 14 surrounding the filter elements 9 and 10, then through the filter medium constituting the walls of those elements into their bores, then through the holes 18 in partition wall 14 into the space between that wall and partition wall 15.
  • the gas then must flow via a similar path through the partition walls 15 and 16 and filter elements 11 and 12 to and through the outlet spigot 18, all as indicated by the arrows in figure 1.
  • the filter medium of the upstream elements 9 and 10 is coated with an adsorbed layer of potassium aluminium sulphate (KAI(S0 4 ) 2 ). This reacts with the lead in the exhaust gas (appearing as PbO) and converts it into insoluble lead sulphate.
  • KAI(S0 4 ) 2 potassium aluminium sulphate
  • the filter medium of the downstream filter elements 11 and 12 is coated with an adsorbed layer of trisodium orthophosphate (Na 3 P0 4 ). That phosphate is hygroscopic and soluble in water. Thus it absorbs water from the products of combustion and this has been found to form a tacky layer covering all of the surface of the porous ceramic filter medium, including the surfaces of the cells within it. This layer is very effective in trapping particulate wastes such as lead sulphate particles, and soot or smoke particles. Furthermore, it has been discovered that the phosphate continuously migrates to the surface of the trapped matter, and being stable, is therefore able to continue functioning for the effective life of the filter medium, that is until the medium becomes clogged with trapped matter.
  • trisodium orthophosphate Na 3 P0 4
  • the illustrated filter is suitable for use with an engine of large capacity.
  • the two parallel filter elements of each stage may be replaced by a single similar element.
  • the two elements of each stage may be replaced by three or more elements in parallel.
  • a single stage, single element filter may be provided.
  • the element may be impregnated with a trimetallic orthophosphate alone (especially for lead free fuel), or both adsorbates may be present in the one filter element.
  • the illustrated filter may be termed a full flow filter, in that all of the exhaust emissions must flow through the filter medium before it leaves the filter.
  • so called by-pass filters in which, under normal operating conditions, a major part of the flow is directed through the medium, but a more restricted path
  • minor path (referred to as a minor path herein) is available that by-passes the filter elements to enable the engine to continue functioning if the filter medium becomes clogged and is not replaced.
  • filters of the by-pass type to which the invention may be applied.
  • such a minor by-pass path could be provided, for example, by providing relatively small openings in the partition walls 14 and 16 at or near their centre points.
  • the illustrated embodiment utilises a ceramic "sponge" for the adsorbent filter medium.
  • a preferred way of producing such a medium is as follows. A body substantially conforming to the size and shape of the required filter element of a fairly rigid plastics foam of open porosity is moulded in conventional manner, or cut from a larger work piece of commercially available stock material. It is, of course, essential that a foam be selected in which the cells are interconnected so that gases or other fluids may pass through it. The plastics foam body is then dipped into a solution of aluminium silicate, preferably of a concentration such that it has the consistency of a thick batter.
  • a ceramic sponge body produced in this way is freely porous to gas and has a very high surface area to volume ratio, enabling it to accept and retain a considerable quantity of adsorbate.
  • the cured ceramic sponge body may then be dipped into a, preferably boiling, solution of KAI(S0 4 ) 2 and/or Na 3 P0 4 as the case may be. Once the solution has dried the filter element may be heated to about 250°C to cause the salt or salts to bond firmly to the ceramic for transport and storage until installed in an engine exhaust filter.
  • the adsorbent filter medium may be water resistant felt or paper.
  • the illustrated embodiment is a one piece filter that has to be replaced in its entirety when clogged, whereas in other embodiments, an end wall of the filter housing may be removed, or it may be otherwise openable, to allow removable filter elements to be replaced.
  • Such filter elements may be bare or in removable cartridges, depending on the overall design of the filter.
  • exhaust gas filters according to the invention may include further filter elements of materials adapted to remove specific components of the exhaust emissions not retained or modified by the filter elements holding adsorbates according to the invention.
  • activated charcoal filter elements may be provided for the retention of carbon monoxide gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Materials (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Un filtre pour les gaz d'échappement de véhicules comprend un logement cylindrique (4, 5, 6) avec des sections de tubes d'entrée et de sortie (7 et 8) permettant de le monter sur le tuyau d'échappement d'un véhicule. Des cloisons (13, 14, 15, 16) à l'intérieur du logement supportent quatre éléments cylindriques filtrants, poreux et en céramique, en l'occurrence deux éléments amont (9, 10) et deux éléments aval (11, 12). Les cloisons ont des ouvertures disposées de manière que le gaz circulant de la section de tube d'entrée (7) vers la section de tube de sortie (8) soit obligé de traverser la paroi cylindrique de l'un ou l'autre des éléments amont (9, 10), et ensuite de traverser la paroi cylindrique de l'un ou l'autre des éléments aval (11, 12). Les éléments amont contiennent absorbée une certaine quantité de sulfate de potassium et d'aluminium adsorbé pour convertir les résidus de plomb des gaz d'échappement en sulfate de plomb, et les éléments aval contiennent une certaine quantité d'orthophosphate trisodique adsorbé ou d'un autre sel hygroscopique pour maintenir leurs surfaces humides et collantes.
EP93920594A 1992-10-08 1993-09-10 Filtre a gaz. Withdrawn EP0663849A4 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AUPL917592 1992-10-08
AUPL9175/92 1992-10-08
AU41264/93 1993-06-15
AU41264/93A AU661907B2 (en) 1992-10-08 1993-06-15 Gas filter
PCT/AU1993/000467 WO1994008698A1 (fr) 1992-10-08 1993-09-10 Filtre a gaz

Publications (2)

Publication Number Publication Date
EP0663849A1 true EP0663849A1 (fr) 1995-07-26
EP0663849A4 EP0663849A4 (fr) 1996-09-25

Family

ID=25625556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93920594A Withdrawn EP0663849A4 (fr) 1992-10-08 1993-09-10 Filtre a gaz.

Country Status (5)

Country Link
EP (1) EP0663849A4 (fr)
JP (1) JPH08501983A (fr)
AU (1) AU661907B2 (fr)
CA (1) CA2145394A1 (fr)
WO (1) WO1994008698A1 (fr)

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US5229462A (en) * 1991-07-12 1993-07-20 The Goodyear Tire & Rubber Company Polyproplene-high trans 1,4-polybutadiene blends
USD912762S1 (en) 2017-11-29 2021-03-09 Megadyne Medical Products, Inc. Fluid trap
USD868287S1 (en) 2017-11-29 2019-11-26 Megadyne Medical Products, Inc. Remote activation clip
US10631916B2 (en) 2017-11-29 2020-04-28 Megadyne Medical Products, Inc. Filter connection for a smoke evacuation device
US10758856B2 (en) 2017-11-29 2020-09-01 Megadyne Medical Products, Inc. Filter medium compression system for smoke evacuation
US10758855B2 (en) 2017-11-29 2020-09-01 Megadyne Medical Products, Inc. Smoke evacuation system fluid trap
US11725664B2 (en) 2017-11-29 2023-08-15 Megadyne Medical Products, Inc. Noise and vibration management for smoke evacuation system
US10758293B2 (en) 2017-11-29 2020-09-01 Megadyne Medical Products, Inc. Smoke evacuation device inlet and outlet manifolds
US11389225B2 (en) 2017-11-29 2022-07-19 Megadyne Medical Products, Inc. Smoke evacuation device remote activation system
US11234754B2 (en) 2017-11-29 2022-02-01 Megadyne Medical Products, Inc. Smoke evacuation device
USD868236S1 (en) 2017-11-29 2019-11-26 Megadyne Medical Products, Inc. Smoke evacuation device control panel
USD886976S1 (en) 2017-11-29 2020-06-09 Megadyne Medical Products, Inc. Filter cartridge
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
CN113457845B (zh) * 2021-08-02 2022-04-19 瑞燃(上海)环境工程技术有限公司 一种用于处理油烟尾气的装置及其工艺方法

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Also Published As

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AU4126493A (en) 1994-04-21
AU661907B2 (en) 1995-08-10
WO1994008698A1 (fr) 1994-04-28
CA2145394A1 (fr) 1994-04-28
JPH08501983A (ja) 1996-03-05
EP0663849A4 (fr) 1996-09-25

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