GB2094658A - Pollutants filter for exhaust gases - Google Patents
Pollutants filter for exhaust gases Download PDFInfo
- Publication number
- GB2094658A GB2094658A GB8207303A GB8207303A GB2094658A GB 2094658 A GB2094658 A GB 2094658A GB 8207303 A GB8207303 A GB 8207303A GB 8207303 A GB8207303 A GB 8207303A GB 2094658 A GB2094658 A GB 2094658A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal sheet
- corrugated metal
- filter according
- pollutants
- sheet elements
- 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- Withdrawn
Links
Classifications
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- 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/922—Mixtures of carbon monoxide or hydrocarbons and nitrogen oxides
- B01D53/925—Simultaneous elimination of carbon monoxide or hydrocarbons and nitrogen oxides
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- 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
- F01N3/0222—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 monolithic, e.g. honeycombs
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- 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
- F01N3/033—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 in combination with other devices
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
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- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
- F01N3/2814—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates all sheets, plates or foils being corrugated
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/14—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel burner
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/18—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an adsorber or absorber
-
- 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
- F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
- F01N2330/04—Methods of manufacturing
-
- 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
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
- F01N2330/321—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils with two or more different kinds of corrugations in the same substrate
-
- 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
-
- 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
- F01N2570/04—Sulfur or sulfur oxides
-
- 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
- F01N2570/12—Hydrocarbons
-
- 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
- F01N2570/14—Nitrogen oxides
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- 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
Abstract
A filter for fossil fuel exhaust gas consists of corrugated metal sheets 1, 2, 3, 6, 10, 11 superimposed to form a stack or coil 8. Adjoining sheets have their corrugations 4, 7 intersecting at an angle 2 alpha so that the resulting structure permits through flow of gas but enforces changes in flow direction causing the gas to impinge on the metal. Noxious gases can dissociate on the metal surface and diffuse thereinto as atoms. Pollutant metal particles can be adsorbed and diffuse into the filter metal. The filter may be placed to treat combustion gases passing to a heat- exchanger. <IMAGE>
Description
SPECIFICATION
Pollutants filter for exhaust gases
The invention relates to a pollutants filter for exhaust gases. In particular although not exclusively it relates to a filter for eliminating noxious substances or pollutants occurring in combustion gases of internal combustion engines and heating apparatus fired with fossil fuels. The filter has a filter matrix which is arranged in a housing and through which the exhaust gases flow.
The combustion gases of heating apparatus and internal combustion engines contain a number of contaminants and pollutants such as for example sulphur oxides, carbon monoxide, nitric oxides and hydrocarbons, likewise metallic contaminants such as lead, cadmium and others. The requirements imposed by law for the elimination of such pollutants and the like are becoming increasingly severe.
Many different kinds of apparatus have been proposed hitherto for eliminating the pollutants.
Neutralising agents are often added in heating apparatus to eliminate acid constituents which occur fairly frequently there. For internal combustion engines, manufacturers have developed postcombustion systems, exhaust gas return flow systems, filters or catalysts, for removing more particularly carbon monoxide, nitric oxides and metal pollutants also.
The present invention has as its object to provide a pollutants filter which is notable for versatile utility, wide range of pollutants elimination, simple construction and small pressure loss.
To this end the present invention provides pollutants filter for exhaust gases having a filter matrix which is arranged in a housing and through which the exhaust gases flow, characterised in that the filter matrix comprises corrugated metal sheet elements placed on one another, with the corrugation peaks of the respective adjacent corrugated metal sheet elements disposed at an angle relative to one another.
Because of this arrangement, the corrugation peaks of the corrugated metal sheet elements situated over one another cross one another at a specific angle, and the gas flowing through between the elements is obliged to change direction appropriately. As this happens, the pollutant particles present in the exhaust gases impinge on the metal surfaces, and the pollutant molecules such as e.g. CO, NO2,
SO2 and hydrocarbons dissociate, diffuse as atoms into the metal and are added thereto. Metal atoms such as e.g. lead can be held fast in the filter matrix by diffusion and addition reaction, and on the matrix surface by chemisorption and condensation. The pollutants filter according to the invention is characterised by simplicity, low pressure loss, broad range of operation and compact constructional arrangement.
A preferred feature is that the corrugation peaks are disposed symmetrically i.e. the corrugation peaks of alternate sheets intersect the through flow direction at angles which are equal in magnitude, but turned to opposite sides of the through flow direction.
The filter matrix can take various constructional forms depending on the construction of the corrugated metal sheet elements according to the invention.
Thus, the corrugated metal sheet elements can be constructed as corrugated sheet panels or plates (i.e.
the corrugations are incorporated in a sheet which is planar overall). These panels are placed on one another to constitute a set of panels and thus form the filter matrix. Preferably such panels are rectangular. This set of panels can then be inserted in an appropriate rectangular-section housing so that the exhaust gases are forced to flow through between the panels.
The corrugated metal sheet elements may also be joined together to form a web folded in meander form, this giving substantially the same flow conditions as in the case of a set of panels.
A further possibility is to form a corrugated sheet coil, in which two corrugated metal sheet strips are wound up lying on one another, for example wound onto a mandrel. The two corrugated metal sheet strips then have differently orientated corrugation peaks, so that the corrugation peaks of respective adjacent corrugated metal sheet strips on the coil, i.e. adjacent turns of the coil, form an angle with one another. It is advantageous in this connection to wind two similar corrugated metal sheet strips lying on one another to form a sheet coil in such a manner that the corrugation peaks of neighbouring corrugated metal sheet strips are situated crosswise relatively to one another.
It is desirable that the corrugated metal sheet elements should have corrugations which are substantiallly sinusoidal in cross-section, since such corrugations cause only small pressure losses.
However, other corrugation forms are also conceivable, for example triangularortrapezoidal crosssections.
The corrugated metal need not be smooth surfaced. It can have a finer structure in addition to the coarse structure represented by the corrugations.
This further increases the surface area and hence increases the filtering action. Such fine structure can consist of roughening, ribs or some other pattern of elevations and depressions.
One way to achieve a structured surface is by forming the corrugated sheet metal elements from at least one layer of wire or metal fibre matting, which can be reinforced as necessary. Wire matting gives a very large filter surface, which enhances the filter action.
The material for the corrugated metal sheet elements can be adapted to the particular use intended, more particularly the temperature load due to the combustion gases and likewise the type of pollutants involved. When dealing with hot combustion gases the corrugated metal sheet elements should be made of heat-resisting metals, for example heatresistant steels. The heat-resistant materials Incoloy 800 or Inconel 600 have been found to be particularly suitable for high temperatures. (The customary composition for Incoloy 800 is 30 to 35% Ni, 19 to 23%Cr, 1.5% Mn, 1.0% Si,0.75% Cu, 0.1%C, 0.15to 0.60% Al, 0.15 to 0.6% Ti, balance Fe.The customary composition for Inconel 600 is 72% Ni, 14 to 17% Cr, 6 to 10% Fe, about 1% Mn and about 0.5% of each of
Cu and Si. ("Incoloy" and "Inconel" are Registered
Trade Marks.) With low temperatures on the other hand copper or V2A steel can be used, for example.
(V2A steel customarily contains 18% Cr, 8% Ni and not more than 0.12% C.)
Corresponding materials may be used for the housing in which the filter matrix is suitable in the high-temperature range.
The filter matrix according to the invention can be used in many different ways in the case of heating apparatus or internal combustion engines. One possible manner of use consists in arranging the corrugated metal sheet elements between a burner or combustion chamber and a heat exchanger adjoining same. In this way the heat exchanger receives combustion gas cleansed of noxious impurities, thus obviating fouling of the heat exchanger. Of course it would also be possible to arrange the corrugated metal sheet elements downstream of the heat exchanger, although this only achieves a reduction in pollutant emissions. The heat exchanger mentioned above can for example be incorporated in water heating systems or similar apparatus.
To explain the invention further, constructional examples will be described with reference to the drawings, in which:
Figure 1 is a fragmentary perspective view of two corrugated metal sheet elements arranged on one another;
Figure 2 shows a perspective view of a corrugated metal sheet element set;
Figure 3 shows a perspective view of corrugated metal sheet elements folded in meander fashion;
Figure 4 shows a perspective view of a corrugated sheet coil;
Figure 5shows a heat exchanger unit with a set of corrugated metal sheet elements inserted therein.
The perspective view in Figure 1 shows parts of two corrugated metal sheet panels 1,2 placed one on the other. Their corrugation peaks in each case extend in straight lines parallel to one another, the corrugated metal sheet panels 1,2 having sinusoidal shape in cross-section.
The corrugated metal sheet panels 1,2 are so arranged on one another that the corrugation peaks of one corrugated metal sheet panel 1 are situated at an angle to those of the other corrugated metal sheet panel 2. An exhaust gas to be filtered flows in the general direction of the arrow A through between the corrugated metal sheet panels 1,2 and it is arranged that the corrugation peaks of the two corrugated metal sheet panels 1,2 are disposed at the same angle a relatively to the throughflow direction.
The exhaust gas is obliged to make direction changes as it flows through, whereby pollutant molecules contained in the exhaust gas impinge on the internal walls. They can dissociate there, and are incorporated as atoms in the metal of the corrugated metal sheet panels 1,2. With a suitably designed filter matrix formed from the corrugated metal sheet elements 1,2 it is possible to reduce metallic contaminants with a filter efficiency of up to 99% and gaseous molecular pollutants such as e.g. SO2, CO,
NO2 and reduce hydrocarbons such as occur in internal combustion engines to the extent of 50% to 95%.
The design of a filter with a filter matrix comprising corrugated metal sheet panels 1,2 can be in accordance with the dimensioning and optimisation method described in German Offenlegungsschriften 2655296 and 26 55 310, and the corresponding
British patents 1598082 and 1598083.
Figure 2 shows a filter matrix assembled from square corrugated metal sheet panels 3. The corrugated metal sheet panels 3 have stamped-in corrugations 4 - symbolised here by simple lines - the corrugations 4 of respective adjacent corrugated metal sheet panels 3 being disposed crosswise relatively to one another. The general throughflow direction for the exhaust gas here again is shown by the arrow A, the corrugations 4 disposed obliquely to this throughflow direction ensuring that the exhaust gas carries out direction changes. The filter matrix can be built into a suitable housing which is open in the throughflow direction.
Figure 3 shows a filter matrix which is similar to that of Figure 2, except that in this case the individual corrugated metal sheet panels are joined on to one another to constitute a corrugated metal sheet ribbon or web 5 folded in sinuous or meander fashion. The corrugated metal sheet 5 has identically stamped corrugated metal sheet surfaces 6. Because of the folding into meander form, the surfaces 6 come to lie on one another in such a manner that the corrugations 7 - again symbolised by lines - of adjoining surfaces 6 are disposed at an angle to one another. The general throughflow direction through the filter matrix is that indicated by the arrow A.
Localised changes in the direction of gas flow are of course imposed by the corrugations 7.
Figure 4 shows a filter matrix which comprises a corrugated sheet coil 8, arranged on a mandrel 9.
The corrugated sheet coil 8 in the view shown is in the process of being formed from two corrugated metal sheet strips 10, which are being drawn simultaneously off two supply reels (not shown here). The corrugated metal sheet strips 10,11 have oblique corrugations 12,13, distributed over their entire length although only a few of these are shown. The strips are wound up together, lying on one another in such a manner that the corrugations 12, 13 of respective adjacent turns of the sheet coil 8 form an angle with one another. The result of this, when throughflow through the sheet coil 8 is in the direction of the arrow A, is to give substantially the same flow conditions as in the case of the filter matrix according to Figures 1 to 3.
Figure 5 shows a filter matrix 16 of the kind illustrated in Figure 2 connected in series with a heat exchange element 14 made of ceramic material.
They are in a stacked arrangement with the matrix 16 on top of the element 14. The metallic filter matrix 16 is inserted in ceramic walls 15 which project beyond the heat exchange element 14 at its inlet or entry side and extend beyond it by at least the length of the filter matrix. The combustion gases flow from above downwardly through the filter matrix 16 and then through the heat exchange element 14 in the direction of the arrow A, so that combustion gases cleansed of pollutants arrive at the heat exchange element 14.
Claims (18)
1. Pollutants filter for exhaust gases having a filter matrix which is arranged in a housing and through which the exhaust gases flow, characterised in that the filter matrix comprises corrugated metal sheet elements placed on one another, with the corrguation peaks of the respective adjacent corrugated metal sheet elements disposed at an angle relative to one another.
2. Pollutants filter according to claim 1 wherein the corrugation peaks of alternate sheets intersect the throughflow direction at angles which are equal but opposite, whereby the corrugation peaks are disposed symmetrically with respect to the through flow direction.
3. Pollutants filter according to claim 1 or claim 2 wherein the corrugated metal sheet elements are corrugated metal sheet panels.
4. Pollutants filter according to claim 3 wherein the panels are rectangular.
5. Pollutants filter according to claim 1 or claim 2 having corrugated metal sheet elements joined together to form a web folded in meander fashion.
6. Pollutants filter according to claim 1 or claim 2 wherein the corrugated metal sheet elements comprise at least two corrugated metal sheet strips which are wound lying on one another to form a corrugated sheet coil.
7. Pollutants filter according to claim 6 having two identical corrugated metal sheet strips wound lying on one another to form a corrugated sheet coil in such a mannerthat the corrugation peaks of adjacent corrugated metal sheet strips are situated crosswise relatively to one another.
8. Pollutants filter according to any one of claims 1 to 7 wherein the corrugated metal sheet elements have sinusoidally shaped corrugations.
9. Pollutants filter according to any one of claims 1 to 8, wherein the corrugated metal sheet elements consist of metal resistant to high temperature.
10. Pollutants filter according to claim 9 wherein the corrugated metal sheet elements consist of steel containing 30-35% nickel and 19 to 23% chromium, e.g. Incoloy 800 or a nickel based alloy containing 14-17% chromium and 6-10% iron, e.g. Inconel 600.
11. Pollutants filter according to any one of claims 1 to 8 wherein the corrugated metal sheet elements consist of heat-resistant metal, e.g. copper or V2A steel (containing nominal 18% nickel and 8% chromium).
12. Pollutants filter according to any one of claims 1 to 11 wherein the housing is made of ceramic material.
13. Pollutants filter according to any one of claims 1 to 12 wherein the corrugated metal sheet elements are situated between a burner or combustion chamber and a heat exchanger connected therewith to receive exhaust gases therefrom.
14. Pollutants filter according to any one of claims 1 to 13, characterised in that the corrugated metal sheet elements have a finer structure superimposed on the corrugations.
15. Pollutants filter according to claim 14, characterised in that the corrugated metal sheet elements comprise at least one layer of matting formed from wire or metal fibres.
16. Pollutants filter substantially as any herein described with reference to any of the drawings.
17. In combination, an internal combustion engine and a filter according to any one of claims 1 to 16 arranged to filter the exhaust from the engine.
18. In combination, heating apparatus fired by fossil fuel, and a filter according to any one of claims 1 to 16 arranged to filter the flue gas therefrom.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813109609 DE3109609A1 (en) | 1981-03-13 | 1981-03-13 | "POLLUTANT FILTER FOR EXHAUST GAS" |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2094658A true GB2094658A (en) | 1982-09-22 |
Family
ID=6127114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8207303A Withdrawn GB2094658A (en) | 1981-03-13 | 1982-03-12 | Pollutants filter for exhaust gases |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3109609A1 (en) |
| FR (1) | FR2501524A1 (en) |
| GB (1) | GB2094658A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0151229A1 (en) * | 1983-11-19 | 1985-08-14 | Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co. KG | Matrix for catalytic reactor |
| EP0222355A2 (en) * | 1985-11-12 | 1987-05-20 | W.R. Grace & Co. | Device for physical and/or chemical treatment of fluids |
| EP0284891A1 (en) * | 1987-03-23 | 1988-10-05 | W.R. Grace & Co.-Conn. | Optimized stacking of metal foil in catalytic converters |
| EP0564914A1 (en) * | 1992-03-30 | 1993-10-13 | Thyssen Stahl Aktiengesellschaft | Device for enlarging small sticky particles |
| EP1538310A1 (en) * | 2003-12-03 | 2005-06-08 | Helmut Swars | Particulate filter |
| EP1559882A1 (en) * | 2004-01-27 | 2005-08-03 | J. Eberspächer GmbH & Co. KG | Exhaust purification device and process for manufacturing an exhaust purification device |
| EP2505800A1 (en) * | 2011-03-30 | 2012-10-03 | Scambia Industrial Developments AG | Unit for reducing the emission of pollutants contained in the exhaust gas of an internal combustion engine |
| CN103670623A (en) * | 2013-12-27 | 2014-03-26 | 吉林省众鑫汽车装备有限公司 | Automobile and metal fiber mesh carrier |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004042730B4 (en) * | 2004-05-21 | 2008-07-31 | Robert Bosch Gmbh | Filter device, in particular for an exhaust system of an internal combustion engine |
-
1981
- 1981-03-13 DE DE19813109609 patent/DE3109609A1/en not_active Withdrawn
-
1982
- 1982-03-03 FR FR8203502A patent/FR2501524A1/fr not_active Withdrawn
- 1982-03-12 GB GB8207303A patent/GB2094658A/en not_active Withdrawn
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0151229A1 (en) * | 1983-11-19 | 1985-08-14 | Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co. KG | Matrix for catalytic reactor |
| US4647435A (en) * | 1983-11-19 | 1987-03-03 | Suddeutsche Kuhlerfabrik Julius Fr. Behr Gmbh & Co. Kg | Catalytic reactor arrangement including catalytic reactor matrix |
| EP0222355A2 (en) * | 1985-11-12 | 1987-05-20 | W.R. Grace & Co. | Device for physical and/or chemical treatment of fluids |
| EP0222355A3 (en) * | 1985-11-12 | 1989-02-08 | W.R. Grace & Co. | Device for physical and/or chemical treatment of fluids |
| EP0284891A1 (en) * | 1987-03-23 | 1988-10-05 | W.R. Grace & Co.-Conn. | Optimized stacking of metal foil in catalytic converters |
| EP0564914A1 (en) * | 1992-03-30 | 1993-10-13 | Thyssen Stahl Aktiengesellschaft | Device for enlarging small sticky particles |
| EP1538310A1 (en) * | 2003-12-03 | 2005-06-08 | Helmut Swars | Particulate filter |
| EP1559882A1 (en) * | 2004-01-27 | 2005-08-03 | J. Eberspächer GmbH & Co. KG | Exhaust purification device and process for manufacturing an exhaust purification device |
| EP2505800A1 (en) * | 2011-03-30 | 2012-10-03 | Scambia Industrial Developments AG | Unit for reducing the emission of pollutants contained in the exhaust gas of an internal combustion engine |
| WO2012131014A1 (en) * | 2011-03-30 | 2012-10-04 | Scambia Industrial Developments Ag | Unit for reducing the emission of pollutants contained in the exhaust gas of an internal combustion engine |
| CN103670623A (en) * | 2013-12-27 | 2014-03-26 | 吉林省众鑫汽车装备有限公司 | Automobile and metal fiber mesh carrier |
| CN103670623B (en) * | 2013-12-27 | 2016-08-17 | 吉林省众鑫汽车装备有限公司 | Automobile and metal fiber mesh carrier |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3109609A1 (en) | 1982-09-23 |
| FR2501524A1 (en) | 1982-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |