WO1993023144A1 - Particulate trap for purifying diesel engine exhaust gas - Google Patents
Particulate trap for purifying diesel engine exhaust gas Download PDFInfo
- Publication number
- WO1993023144A1 WO1993023144A1 PCT/JP1992/000634 JP9200634W WO9323144A1 WO 1993023144 A1 WO1993023144 A1 WO 1993023144A1 JP 9200634 W JP9200634 W JP 9200634W WO 9323144 A1 WO9323144 A1 WO 9323144A1
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- WIPO (PCT)
- Prior art keywords
- filter element
- exhaust gas
- trap
- container
- filter
- Prior art date
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Classifications
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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
- F01N3/031—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2027—Metallic material
- B01D39/2051—Metallic foam
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- 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
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- 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
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4263—Means for active heating or cooling
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- 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
- B01D46/60—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 arranged concentrically or coaxially
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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
- F01N3/0217—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
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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
- F01N3/0218—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 being made from spirally-wound filtering material
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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
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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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
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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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—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 using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2275/20—Shape of filtering material
- B01D2275/206—Special forms, e.g. adapted to a certain housing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2275/30—Porosity of filtering material
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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
- 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
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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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/12—Metallic wire mesh fabric or knitting
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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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/10—Residue burned
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/30—Exhaust treatment
Definitions
- the present invention relates to the power technology in exhaust gas of diesel engines.
- Surgical field Vehicle exhaust gas is one of the major causes of air pollution, and technology to remove harmful components contained in exhaust gas is extremely important, especially in Dieselen.
- Dieselen In the case of gin cars, mainly
- the regulated value of the regulated emissions differs in each country.
- New paper / mi 1 e is set as the target value, and each is a stricter regulation value. No ,.
- the amount of discharge of the tequilet varies depending on the displacement and load of the diesel engine, but in order to satisfy the above regulations, It is said that it is necessary to satisfy an average collection efficiency of 60% or more with respect to the amount of exhaust gas and other emissions.
- the pressure loss to exhaust gas is small.
- the engine exhaust has a greater resistance to airflow as the trapped technician collects the force that is exhausted through the trap. The back pressure after collection to prevent the engine from adversely affecting the engine.
- the heat is heated above the temperature at which the heat is ignited (typically 600 ° C). Regeneration is performed before engine performance is degraded due to an increase in back pressure or operation is hindered, and the paticle is incinerated. After that, the paticle is collected again, and the regeneration and collection of the pectate are repeated, so that the pressure loss is always maintained at a certain level or more. . For this reason, it is necessary to select a heat-resistant material that can withstand repeated regeneration for the filter element material, and also requires corrosion resistance due to the atmospheric gas contained in the exhaust gas. is there.
- a filter element material that satisfies the above-mentioned requirements, a cordy-light ceramic mix, a two-cell-like porous material, has been most practically used. It was considered a material and continued to be studied.
- new paper In the conventional method of burning the fine particles trapped in the dielite ceramics, the filter is repeatedly heated to a high temperature, and the heat generated by the combustion heat is reduced. In some cases, the filter was damaged by heat, and cracks were generated due to thermal shock due to temperature rise and cooling during regeneration.
- the present invention has been made in view of the above-mentioned problems of the prior art, and has as its object a low pressure loss, high collection efficiency, and a temperature increase and cooling during regeneration. Diesel exhaust gas that can withstand thermal shocks, for cleaning exhaust gas, tech traps and filter elements that make up the traps It is an attempt to provide a comment.
- the filter element that collects the tecturate must have an appropriate pore size, and the filter element must be configured. It is necessary that a collection site such as a fiber or a skeleton is sufficient in the thickness direction, and a filter structure that facilitates collection is used. In addition, the size and surface condition of the trapping site are also affected. New paper The above requirements for trapping performance and the requirement to suppress back pressure rise are contradictory, and in order to satisfy both requirements, a filter that is installed within a certain trap volume is required. It is necessary to increase the gas inflow surface area as viewed from the exhaust gas inflow side of the filter element and to have a compact structural design.
- a conductive film having a three-dimensional network structure having communicating holes is subjected to a conductive treatment, and is subjected to an electric plating method.
- a porous metal body Silicone “Cement”.
- the three-dimensional network porous body is a porous body composed of a skeleton 3 having communication holes 2 and a pocket-like hole 2 surrounded by the skeleton. Due to its high porosity, gas flow resistance is extremely small, but once the packet is trapped in the pocket-shaped holes, Since it is difficult to separate from the space, the space collecting performance of the paticle is excellent.
- the present inventors have determined that the pore diameter of the three-dimensional mesh-like porous body having communicating pores and the filter dimensions are different from each other. : The number of holes in the vertical direction, the volume filling ratio occupied by the metal skeleton in the filtration part consisting of the three-dimensional network porous material that constitutes the filter element, In addition, the exhaust gas inflow area and filter trap per filter liter per 1 L of engine displacement to which the trap is attached We pursued the relationship between collection efficiency and pressure loss.
- the pore force of the three-dimensional network porous material to be used is determined by the balance force of the object and the balance force.
- the “pores” are the diameters of the holes existing in the skeletal space, and correspond to the diameters of the bubbles when foamed to form a three-dimensional network structure. From the viewpoint of the collection efficiency, it was found that the pore diameter of the three-dimensionally structured porous body was desirably from 0.1 to L in m.
- the average pore size is less than 0.1 mm, the trapping efficiency is excellent, but the ventilation resistance increases in a short time, and the back pressure on the engine is short. Exceeding the above 30 KPa, the burden on the engine increases, which is not desirable. If the average pore diameter is 1 mm or more, the rate of passing through the filter element increases, and the collection efficiency at the beginning or immediately after the regeneration treatment becomes insufficient, and the collection efficiency is 60% or more. Efficiency cannot be achieved.
- Filter element thickness direction Existence 0.1 to: Lmm average number of holes (In a straight line crossing in the thickness direction, if the number of holes is small, it is counted as one. ) Is less than 10%, the collection efficiency is low and it is not preferable. This was found.
- the volume filling ratio occupied by the metal skeleton in the filtration part of the filter element formed by the three-dimensionally structured porous body is as small as 10% or less. This is not preferable because the probability of colliding with the exhaust gas force skeleton and adhering thereto is reduced, and the probability of being trapped is also reduced. On the other hand, if it is 40% or more, the volume occupied by the skeletal filtration part is large, which is good for improving the collection efficiency. It was found that 40% or less is preferable.
- the exhaust gas inflow area of the filter element per 1 L of the engine to which the trap is to be mounted is less than 400 cm 2 . If there is, no. The entrance through which the filter element permeates the filter element is small, and if the same displacement is considered, the exhaust permeates through the filtration section. It is not preferable because the gas permeation speed increases and the pressure loss increases.
- the present inventors have proposed a method of forming a three-dimensional mesh-structured porous body having a cross-sectional projection width (projection length of a side in a cut surface of the metal skeleton).
- ⁇ Paper As a result of pursuing the performance of the orchid, it was found that if the cross-sectional projection width of the skeleton is 20 inches or more, even better performance is exhibited. At a distance of 20 m or less, the number of cases in which the patrate penetrates the metal skeleton without colliding with the metal skeleton increases, and the trapping efficiency is reduced.
- the present inventors have pursued the relationship between the surface roughness R max of the metal skeleton constituting the three-dimensional network porous structure, the collection performance, and the pressure loss. It was found that excellent filter performance could be obtained by using a three-dimensional network porous material having a skeleton surface with a surface roughness of R max 0.2 m or more. If the surface roughness of the metal skeleton is less than R max 0.2 ⁇ , the particulate that has been trapped once will be blown away by the exhaust gas that continues, and will eventually be blown off. The rate at which it is trapped is small, which is not desirable. No ,.
- Fig. 1 is an enlarged view of a porous body with a three-dimensional network structure having communicating holes.
- FIG. 2 is a perspective view of a filter element formed by concentrically stacking three-dimensional mesh porous sheets.
- FIG. 3 is a perspective view of a filter element formed by concentrically stacking a three-dimensional network porous sheet.
- Figs. 4 (A) and (B) are a longitudinal front view and a longitudinal central side view showing an example of a putty trap.
- Figs. 5 (A) and (B) are a vertical cross-sectional front view and a vertical cross-sectional side view of a central portion of a putty trap.
- Figs. 6 (A) and (B) are a vertical front view and a vertical side view of the central portion of the putrate trap.
- Figs. 7 (A) and (B) are a vertical front view and a vertical side view of the central part of the putty trap.
- Fig. 8 (A) and (B) show the new paper for the pasty tray.
- Figures 9 (A) and (B) are a vertical front view and a vertical longitudinal side view of the putty trap.
- Fig. 10 shows an integrated paticle with a heater that is effective for burning and removing the collected paticles in which a seeds heater is embedded in a three-dimensional mesh porous filter.
- G is a perspective view showing an example.
- Fig. 11 is a schematic diagram showing an example of installing a trap and a regeneration gas supply device in the exhaust system of a diesel engine.
- the diesel exhaust gas purifying paste trap of the present invention uses a three-dimensional network structure porous body as described below from the above viewpoint. Specifically, the present invention employs the following configuration. An example is described with a diagram.
- FIGS. 2 and 3 are examples of filter elements, respectively.
- FIG. 2 shows a three-dimensional network porous sheet 10 made of a heat-resistant metal wound spirally.
- FIG. 1 shows a perspective view of a filter element 5 formed by concentrically stacking a porous sheet 10 having a reticular structure.
- Fig. 7 (A) and (B) show examples of one finlet element, one of which is attached to the trap 12 and one of the traps.
- a longitudinal front view and a longitudinal longitudinal side view at the center in the longitudinal direction of the trap are shown.
- Figs. 8 (A) and (B) show examples in which a plurality of filter elements 1 17 are mounted in a container 1 12, respectively.
- FIG. 4 is a vertical front view of the trap and a vertical side view of a central portion in the trap longitudinal direction.
- the particulate curling trap for purifying the diesel engine exhaust gas of the present invention is a particulate curable trap discharged from the diesel fuel engine. Traps in the exhaust system to trap and remove exhaust gas from the diesel engine exhaust gas inlet 1 3 or 1 13 and gas outlet 1 4 or 1 1 4 Container 1 2 or 1 "is filled with a file element 17 or 1 17 in 12 Filter element 17 or 1 17 3D mesh-structured porous body 1 or 1 1 made of heat-resistant metal skeleton with continuous ventilation holes 1 or 1 1 New paper For example, the spiral-shaped body 4 shown in FIG. 2 or the concentric cylindrical body 5 shown in FIG. 3 formed from FIG. 1, and as shown in FIG.
- a plurality of tubes are mounted in the container 12 or 112 and a space formed between the outer peripheral surface at one end of each cylindrical body and the inner peripheral surface of the container.
- the other end surface opening of each cylindrical body is closed and closed by closing portions 18, 118, respectively.
- the specific gist of the diesel exhaust gas purifying trap of the present invention is as follows: a container installed in the exhaust system and a filter mounted on the container.
- the filter element is formed from a three-dimensional reticulated porous body composed of a heat-resistant metal skeleton having communicating holes.
- the average pore diameter of the pores is 0.1 to 1 mm, the average number of pores in the thickness direction of the porous body is 10 sqm, and the filtration of the filter element is performed.
- Volume filling ratio occupied by the metal skeleton in the part is 10 to 4
- the displacement of the engine to be installed is characterized by being configured to be 0 cm 2 or more.
- the pat- tern trap is made of a three-dimensional net-like porous body 211 made of a heat-resistant metal having communication holes 2.
- the resulting filter element 2 17 and the container 2 1 2 force consist of a plurality of cylinders of different diameters formed by a three-dimensional network porous structure.
- the filter elements 2 17 a, 2 17 b, and 2 17 c are mounted concentrically in the container 2 12 with a predetermined gap between the cylinders.
- the specific gist of the diesel engine stove gas purifying trap of the present invention is as follows: the container installed in the exhaust system and the inside of the container.
- the filter element is formed from a three-dimensional network porous body composed of a heat-resistant metal skeleton having communicating holes.
- the average pore diameter of the pores of the porous body is 1 to 1 mm, the average number of pores in the thickness direction of the porous body is 10 or more.
- the volumetric filling capacity occupied by the metal skeleton in the filtration section of the filter element is 10 to 40%, and the displacement of the engine to which the trap is attached is 1 L / L.
- Figures 4 (A) and 4 (B) show specific examples for increasing the exhaust gas inflow surface area of the filter element. They are a longitudinal front view of the trap and a longitudinal side view at the center in the longitudinal direction of the trap, respectively.
- the particulate collector 3 25 shown in FIGS. 4 (A) and (B) is a three-dimensional network structure porous body 31 made of a heat-resistant metal having a communication hole 2.
- a filter element 3 17 of a cylindrical body formed into a waveform in the circumferential direction using 1 is mounted in the container 3 12, and an end face opening at one end of the cylindrical body is mounted. And a space formed between the outer peripheral surface of the other end and the inner peripheral surface of the container is closed by using a closing member 318.
- the specific gist of the diesel engine trap for purifying diesel engine exhaust gas according to the present invention is a container installed in the middle of an exhaust system, and a container installed in the exhaust system.
- the filter element is formed from a three-dimensional network porous body made of a heat-resistant metal skeleton having communicating holes.
- the average diameter of the pores is 0.1 to 1 mm, and the average number of pores in the thickness direction of the porous body is 10 or more, and the filter element constitutes the filter element.
- the volume fill ratio occupied by the metal skeleton in the filter section of the filter element is 10 to 40%, and the engine exhaust to which the trap is to be installed Gas to filter element per 1 L.
- Die-zeelzyne exhaust gas clean-up pouch characterized by an inflow surface area of at least 400 cm 2
- a cylindrical body that is formed into a circumferentially corrugated shape is mounted in a container, and an end face opening at one end of the cylindrical body And a filter element formed by closing the space formed between the outer peripheral surface at the other end and the inner peripheral surface of the container. This is the feature.
- a three-dimensional network porous body 411 made of a heat-resistant metal having communication pores 2 ,
- a ration 4 25 or 5 25 is mounted in the container 4 1 2 or 5 1 2, and an opening at one end of the cylindrical body and an outer circumferential surface at the other end.
- the space formed between the inner peripheral surface of the vessel and the inner peripheral surface is closed by seal members 18 and 518.
- the specific gist of the diesel exhaust gas purifying particulate trap of the present invention is that a container is provided in the middle of the exhaust system, and a fuel tank is provided in the container.
- the filter element has a three-dimensional mesh-like porous structure consisting of a heat-resistant metal skeleton with communicating pores.
- the average diameter of the pores of the porous body is 0.1 to 1 mm.
- the average number of pores in the thickness direction of the porous body is 10 or more
- the volume crushing ratio occupied by the metal skeleton in the filtration section of the filter element is 10 or more.
- the gas inflow surface area of the filter element per 1 L of engine displacement to which the trap is to be mounted is 400
- a diesel engine exhaust gas purification paticle trap characterized by having a diameter of at least 2 cm2. And a space between the outer peripheral surface of the other end and the inner peripheral surface of the container. It is characterized in that a filter is mounted.
- the filter element is preferably formed of a three-dimensional network-structured porous body composed of a Ni-based heat-resistant alloy skeleton having communicating pores.
- ⁇ 60 to 85% by weight
- Cr 1
- the filter element is composed of a three-dimensional network porous body composed of a Ni-based heat-resistant alloy skeleton having communicating pores, preferably N 585 wt%. , C
- A1 50% by weight
- A1 50% by weight
- A1 1%. It was found that when the composition was out of the above range, the heat resistance was deteriorated, and the durability for sealing after repeated long-term collection and regeneration was reduced.
- the addition of A 1 is an effective element that contributes to the improvement of the heat resistance compared to the case where only Cr is added. Addition of 1% or more of A1 forms a stable oxide film against oxidation and contributes to heat resistance.However, addition of 6% or more of A1 is an intermetallic compound in which Ni and A1 elements are brittle. As a result, the workability is deteriorated, and in particular, the sheet cannot be bent and is broken.
- the addition was within the range of 16% A, it was sufficiently workable and, for example, forming a filter element in a cylindrical shape was completely indispensable.
- sulfuric acid mist is present in the exhaust gas, and the oxide film of A1 is also resistant to sulfuric acid, so long-term reliability for traps is required.
- an electric heater can be provided on the above-mentioned pat- tern trap. After a certain amount of the notch rate has been collected, the electric heater is filtered so that it can be burned off by the electric heater. Front or back, or cylinder file New paper
- the electric heater may be installed on the outer periphery or the inner periphery of the filter, or the electric heater may be buried inside the cylindrical filter made of porous metal. It is possible to take into account the balance between power consumption and combustion efficiency.
- Test Example 1 Test Example 1
- FIG. 8 shows examples of schematic diagrams of diesel circulating gas purifying traps.
- Fig. 8 (A) is a vertical cross-sectional front view of a technic trap
- Fig. 8 (B) is a vertical cross-sectional side view of a central portion of the trap in the longitudinal direction. is there .
- FIG. 8 it is composed of a filter element 1 17 and a storage container 1 1 2.
- the gas supply unit for regeneration can generate 600-900 hot air from the gas oil burner, and can be replaced with exhaust gas and a strong trap, and the vino, 'When it is pressed, hot gas for regeneration can be supplied to the trap. No.
- the elements 1 17 are evenly housed in the filter element storage container 1 1 2 so that they are along the gas flow direction, and the gas outlet 1 1 4 side of each cylinder 17
- the space formed simply between the outer peripheral surface of the end of the cylinder and the inner peripheral surface of the storage container 1 12 and the end surface opening on the gas inlet 13 side of each cylinder 17 are formed by a sealing member 118.
- the exhaust gas passes from the inner surface of the cylindrical body 117 to the outer surface of the cylindrical body 117 as shown by the arrow in FIG. 8 (A).
- the flow path is formed so as to perform.
- a new paper -2 ⁇ -ureate is collected and filtered, and the clean gas is trapped. It is configured to be discharged outside.
- the filter element is composed of a three-dimensional reticulated porous body made of a heat-resistant metal (for example, Sumitomo Electric's metal porous body: Cellmet). .
- a heat-resistant metal for example, Sumitomo Electric's metal porous body: Cellmet.
- the resin component is heat treated to remove the resin component.
- the Ni material formed by combustion removal is used as the basic material, and further alloyed by the chroming process.
- a 3D network porous body made of a Ni-Cr alloy by weight was used.
- a filter sheet formed by spirally winding a metal sheet of a three-dimensional network structure porous body into a cylindrical shape is placed in a trap container.
- the thickness of the filter element shall be LO mm, and the volume filling ratio of the porous metal body in the thickness direction of the filter element shall be changed by changing the number of turns and the degree of compression processing. And 5 to 45%. As a result, the number of vacancies in the thickness direction was also changed.
- Tables 1 to 3 show the configurations of the filter elements used in the experiments, and Tables 4 to 6 show the configurations of comparative examples.
- Table 7 shows the characteristics obtained in the examples.
- Table 8 shows the characteristics obtained in the comparative example.
- a three-dimensional mesh-structured porous body made of a Ni—Cr alloy having a surface roughness R max of 0.2 or more was used.
- the engine exhaust gas is bypassed from the trap device, and the trap is supplied with 2 m of heated air at an average temperature of 700 from the hot gas supply device for regeneration. It was fed for about 15 minutes at a flow rate of 3 / m ⁇ , and the collected patrates were regenerated by burning.
- the pressure loss of the filter after regeneration dropped sharply-new paper It was observed that the pressure decreased to a value around 1-2 KPa of the initial pressure. This is because the particulates trapped in the exhaust filter are burnt and extinguished, and the regeneration of the exhaust gas filter is performed well. It is shown that .
- the technol- ogy filter did not dissolve, cracking or extreme oxidation or corrosion was observed.
- the exhaust circuit was switched again and the exhaust test was performed. After 20 repetitions of the cycle, the exhaust circuit was switched to the hot gas supply circuit for regeneration again, and the regeneration described above was performed.
- the maximum temperature was 8 ⁇ 0 t, but the temperature dropped within 3 minutes at maximum. Indicates that combustion was completed.
- Example 1 the result of mounting the cylindrical filter element in the filter element storage container with t to 7 pieces; t is shown. 9 Figure
- the filter element 2 17 is made of a heat-resistant metal having continuous ventilation holes 3
- New paper A plurality of cylinders 2 17 a, 2 17 b, and 2 17 c having different diameters formed by using the porous sheet 10 having a three-dimensional network structure are formed between the cylinders.
- the gap at one end and the end face opening of the innermost cylindrical body are different between the gas inlet side 2 13 and the gas outlet side 2 14 respectively.
- a closed trap 2-25 may be used as well. That's it!
- the displacement per 1-liter engine where a trap can be attached in a limited container is considered. Since the gas inflow surface area can be made large, there is an advantage that the space can be used effectively.
- the exhaust gas inlet side 21 1 is set so that the exhaust gas inlet side and the outlet side of the trap are reversed. 3 and the exhaust gas outlet side 2 1 4 are reversed, so that the exhaust gas flow is allowed to pass to the outer surface inside the cylinder, but the same size field In the case of the element, trapping efficiency is reduced by only about 10%, and no significant difference is observed. A trap with sufficient performance can be obtained. Was.
- the relationship between the cross-sectional projection width of the metal skeleton constituting the three-dimensional network porous structure and the filter characteristics was investigated.
- the test was conducted using a trap with the filter element shown in the 8th week (A) and (B) in the exhaust system of a 2.8 L displacement swirl type diesel engine. I used a kiln.
- the cross-sectional projection width of the skeleton was changed, and the test was performed at 180 rpm at 5 kgf 'm for 3 hours, and the technic trap was collected. Then, the collection amount and the pressure loss were reduced.
- the projected width of the skeleton cross section varies depending on the average diameter and the number of holes, a three-dimensional network porous material having a width of 17 to 250 / m was used.
- Table 9 shows the configurations of Examples and Comparative Examples of the various putty traps used in the experiments.
- Table 10 shows the evaluation results of Test Example 2 for the Examples and Comparative Examples. Also shown.
- the pore size of the porous body is 0.1 to 1.0 m, and the thickness of the film element consisting of the three-dimensional network structure porous structure is described.
- the average number of pores in each direction is 1 or more, and the volume filling ratio of the porous material in the filter section of the filter is 10 to 40%, and new paper As long as the filter exhaust gas inflow surface area satisfies 400 cm or more, and the cross-sectional width of the metal skeleton to be formed is 20 m or more, anyway. It was also confirmed that a sufficient amount of trapping and an excessive pressure loss did not occur. In the range outside the above-mentioned conditions, it was not possible to obtain a sufficient trapping amount and low pressure drop
- Fig. 9 (A) shows a vertical front view of the trap.
- Fig. 9 (B) is a side view of the longitudinal center of the trap. No ,.
- the three-dimensional network porous body 211 made of a heat-resistant metal having at least oil 21 and a communication hole 2 with a strong trapping force.
- the filter element 2 17 and the container 2 1 2 become the same, and the filter element 2 17 a of a plurality of cylindrical bodies with different diameters
- 2 17 b and 2 17 c are concentrically mounted in the container 2 12 with a predetermined gap between each cylinder, and the gap at one end of the cylinder located at the outermost position And the end face openings of the innermost cylindrical body, respectively, on the gas inlet side 2 1
- the filter element used in the experiment was made of a three-dimensional network porous metal sheet with a constant curvature. As shown in Example 1, the size of the filter element was designed in consideration of the inflow area into the filter element. A continuous sheet with a three-dimensional network structure with an average pore diameter of 0.5 mm, outer diameter of 140 mm, thickness of 1
- the heat-resistant body used for the fixation experiment was a Ni-Cr metal porous body obtained by alloying a Ni-based three-dimensional mesh-structured porous body manufactured by Sumitomo Electric Co., Ltd. by chroming. I used my body.
- the chromium chloride gas is generated from the powder, and the amount of generated chromium gas is changed to the rate at which the gas is released into the mouth or skeleton. Because of this, it is possible to arbitrarily change the surface state of the skeleton of the Ni—Cr alloyed metal porous body, as is often experienced in a normal CVD process. Ni-Cr-A1 Powder alloying is also performed when producing an alloyed metal porous body. At this time, if a single source gas is generated little by little and then deposited on the surface of the base porous skeleton, a smooth surface can be obtained,
- New paper It is often experienced that when the raw material gas is generated, a rough surface state of the skeleton surface is easily obtained. If the surface is roughened and subjected to a high-temperature treatment in a reducing atmosphere of 1000 or more, the elements precipitated on the skeleton will begin to diffuse into the skeleton, so they will be extracted. Immediately afterwards, even a rough surface state can be gradually smoothed.
- Table 11 shows the time and change between the filter element and the amount of the collected particulates, which were produced with various surface roughness. As shown in Table 11, the higher the skeleton surface roughness, the higher the efficiency in the early period when the particulate curl is collected than the smooth surface, especially the surface. The condition was found to have an effect at the beginning of the collection. It has been found that a trapping effect is obtained when the surface roughness Rmax is 0.2 m or more, but in particular, in the present invention, the shape is not limited if the surface roughness Rmax is 0.2 m or more. Similar to Ni—Cr alloyed metal porous body, it can be applied to Ni—Cr—A1 alloyed metal porous body made by using powder and alloying method. It is not something that can be done.
- Fig. 4 (A) and ( ⁇ ) show the vertical front view of the trap and the longitudinal direction of the trap in this experimental example, respectively.
- New paper It is a longitudinal sectional view at the center.
- the filter trap is made of a heat-resistant metal in which the filter element has a continuous ventilation hole.
- This cylindrical body is a filter element storage container 3 1 2 And a space formed between the outer peripheral surface at the other end of the end surface opening at one end of the cylindrical body 3 17 ′ and the inner peripheral surface of the container 3 12 ′. Curate collectors 3 25 are formed.
- a ruta element was produced.
- the thickness of the element is assumed to be 1 Omm-a new sheet of corrugated sheet manufactured by changing the size in advance so that it has the specified thickness After being superimposed and integrated, the finish molding was performed again.
- the size of the container was 160 mm in inner diameter, and the length of the filter element was 35 O mm.
- the pores of the three-dimensional network structure porous body shown in Table 12 were set to 0.5 lim, 0.5 m, and 1 m, and the volume filling ratio was 10 to 40%.
- the thickness of the overlapping sheets was adjusted so that it could be changed within the range.
- the number of holes in the skeleton was determined by measuring the number of holes crossing in the thickness direction at three points.
- the cylindrical body 31 1 ⁇ of the corrugated filter element formed in this way is housed in the filter element storage container 3 1 2, and this cylindrical body A space formed between one end opening of one end of 3 17 and the outer peripheral surface of the other end and the inner peripheral surface of the container 3 1 2 is closed to form a pasty collector 3 2 5 did.
- the number of paticle collectors and the number of pitches in which the number of waveform filter elements in the example was reduced to four in the same container as the example was Paper with a filter cylinder element of 0 cylindrical cylinder ⁇ It was prepared, mounted in a container, and the end face was closed to prepare a particulate curd.
- the specific configuration of the comparative example is shown in Table 12 together with the example. The test was performed by installing the exhaust system with a displacement of 2.8 L diesel engine, operating at a speed of 160 rpm and a torque of 6 kgf ⁇ in for up to 6 hours. No ,. The technics were collected. The amounts collected and the pressure loss of the above-described examples and comparative examples were measured and evaluated. As shown in Table 13, the trapezoid trap of the present example showed almost the same amount of trapping for the comparative example at the same trapping time at the same trapping time. If you have power, 15 ⁇
- FIGS. 5 (A) and 5 (B), which will be described below, together with a comparative example, show an example of a putrate trap according to the present invention.
- Fig. 4 shows a longitudinal front view of the trap and a longitudinal sectional view of the trap in the center in the longitudinal direction, respectively, in the experimental example.
- the filter tray has a filter element with a Ni-Cr structure in which the filter element has a continuous ventilation hole.
- a three-dimensional mesh-structured porous body 411 made of gold is composed of a filter element cylinder 417 with regularity in the axial direction with the cylinder axis as the center.
- a new paper formed in a corrugated The cylindrical body is housed in the filter element storage container 412, and the end surface opening at one end of the cylindrical body 417, the outer peripheral surface at the other end, and the container. A space formed between the inner surface and the inner peripheral surface is closed to form a particulate curd collector 4 25.
- a cylindrical filter element was fabricated. The thickness of the element is assumed to be 10 mm, and the sheets that have been formed in advance by changing the size so as to obtain the specified thickness are overlapped and integrated. Then, the finish molding was performed again.
- the filter element storage container has the same internal diameter as that of Test Example 4 and an inner diameter of 160.
- the length of the paticle collector consisting of the filter element is 3 It was 50 mm.
- the waveform is in the axial direction
- Table 14 shows the specific configuration of the filter element, combining this example and the comparative example.
- the test was performed by installing the diesel engine with a displacement of 2.8 L on the exhaust system and rotating at a speed of 160 rpm and a torque of 6 kgfm for up to 6 hours. We drove and collected the notice curates. The amount of trapped water and the pressure loss in the above-described examples and comparative examples were measured and evaluated.
- Table 15 shows the performance evaluation results of the comparative examples.
- the filter elements with the same outer diameter are formed in a waveform in the axial direction, so that the trapped amount is almost the same, but the rise in pressure loss is suppressed. This was found. This is because the filter element that forms the tecturate collector is corrugated, and the gas inflow area of the filter element This is because the effect of increasing the value was obtained.
- Test Example 1 the results of a study on a filter using a metal three-dimensional network porous body made of a Ni-Cr alloy were shown, but this was not the case.
- the filter is not limited to the composition, and the filter made by Ni-Cr alloy with the following composition was also examined. Further, with respect to the three-dimensional network-structured porous body made of the NCr-A1 alloy, a filter-structured porous body having the same structure as in Example 1 was formed.
- Test Example 1 as an example of the present invention for removing the particulate matter collected in the filter element, a burner without strict control was used. It shows that the particulates trapped in a three-dimensional network porous material made of a heat-resistant metal can be removed by a regeneration method using the heat of combustion by did. In this case, the paste collected on the heat-resistant three-dimensional mesh-like porous material was added to new paper. Provides a method for removing heat by electric heater. In this case, one point is how to arrange the heater elements.
- a filter element cylinder in which a sheet heater is formed from a three-dimensional network porous material is used. . The seeds heater penetrates the exhaust gas power and is embedded inside the wall where the particulates are collected.
- the cylinder 6 1 the cylinder 6 1
- 6 22 A, 62 2 B ⁇ 62 2 C, 62 2 D As far as possible, it is embedded in the side near the gas inlet side.
- the 62 A sheath heater is integral with the 62 A sheath heater and is bent near the end face B. The bent portion is embedded in the end face B. 6 2 2
- 62 2 A to 62 2 D are arranged at approximately 90 degrees.
- the heater-equipped fins obtained in this manner are sealed in a trap as shown in Figs. 8 (A) and (B) so that the end face is closed. Then, four were attached.
- the filter obtained in this way When installing the trap on the trap, the exhaust gas was passed from inside to outside.
- the dimensions of the filter element are 150 mm in outer diameter, 10 mm in thickness, and 35 O mm in length.
- the finoleta element is composed of a Ni—Cr alloy force, which uses a three-dimensional network porous body with an average pore diameter of 0.5 mm and the number of pores in the thickness direction. Were molded into 35 pieces and the volume filling ratio was 20%.
- This trap is attached to the exhaust system of a diesel engine with a displacement of 2.0 L, and exhaust operation is performed with a torque of 200 rpm and a torque of 5 kgfm. Was performed.
- the initial pressure loss was 1 KPa, as the operation progressed, the pressure loss due to the collected patrate increased to 6 KPa in 5 hours.
- the electric heater was energized and heated at this point. In this experiment, it was assumed that 62 A and 62 B (ten) poles were used, and that
- the heat exchanger which is guaranteed by a heater provided on the exhaust gas inflow side, heats up the temperature together with the metallic three-dimensional network structure porous body, forming a heat exchanger. As soon as the cargo arrived, flinting began, and the combustion swiftly ignited, and the regeneration of the filter was completed.
- the three-dimensional network porous material used in the present invention is metal and porous, it has a lower heat capacity and thermal conductivity than a cordier filter, and therefore, The heat generated in the soot combustion area is easily removed by a large amount of exhaust gas, and local abnormal overheating of the filter material can be prevented. Meanwhile, new paper It is maintained only in close proximity to the burning part, and therefore does not generate rapid thermal or cooling thermal shocks, but at a gentle, very desirable rate. Combustion takes place.
- the heater is embedded near the inside of the cylinder on the gas inlet side, but when the gas flows from the outside to the inside, the heater is located near the outside of the cylinder.
- the method of embedding is desirable from the viewpoint of thermal efficiency.
- the collection efficiency is high and the pressure is high.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtering Materials (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP92910207A EP0603392B1 (en) | 1992-05-13 | 1992-05-13 | Particulate trap for purifying diesel engine exhaust gas |
DE69216101T DE69216101T2 (de) | 1992-05-13 | 1992-05-13 | Partikelfilter zur reinigung von dieselmotorabgas |
PCT/JP1992/000634 WO1993023144A1 (en) | 1992-05-13 | 1992-05-13 | Particulate trap for purifying diesel engine exhaust gas |
US08/185,983 US5458664A (en) | 1992-05-13 | 1992-05-13 | Particulate trap for purifying diesel engine exhaust |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1992/000634 WO1993023144A1 (en) | 1992-05-13 | 1992-05-13 | Particulate trap for purifying diesel engine exhaust gas |
Publications (1)
Publication Number | Publication Date |
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WO1993023144A1 true WO1993023144A1 (en) | 1993-11-25 |
Family
ID=14042345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1992/000634 WO1993023144A1 (en) | 1992-05-13 | 1992-05-13 | Particulate trap for purifying diesel engine exhaust gas |
Country Status (4)
Country | Link |
---|---|
US (1) | US5458664A (ja) |
EP (1) | EP0603392B1 (ja) |
DE (1) | DE69216101T2 (ja) |
WO (1) | WO1993023144A1 (ja) |
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JPS5710319A (en) * | 1980-06-23 | 1982-01-19 | Toyota Motor Corp | Exhaust gas filter for internal combustion engine |
JPS58151417U (ja) * | 1982-03-31 | 1983-10-11 | 株式会社 土屋製作所 | 排気ガスフイルタ |
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- 1992-05-13 US US08/185,983 patent/US5458664A/en not_active Expired - Lifetime
- 1992-05-13 DE DE69216101T patent/DE69216101T2/de not_active Expired - Lifetime
- 1992-05-13 EP EP92910207A patent/EP0603392B1/en not_active Expired - Lifetime
- 1992-05-13 WO PCT/JP1992/000634 patent/WO1993023144A1/ja active IP Right Grant
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JPS5511024A (en) * | 1978-07-11 | 1980-01-25 | Origin Electric Co Ltd | Filter moldings and production thereof |
JPS5710319A (en) * | 1980-06-23 | 1982-01-19 | Toyota Motor Corp | Exhaust gas filter for internal combustion engine |
JPS58151417U (ja) * | 1982-03-31 | 1983-10-11 | 株式会社 土屋製作所 | 排気ガスフイルタ |
JPS58166823U (ja) * | 1982-04-30 | 1983-11-07 | 株式会社土屋製作所 | 排気ガスフイルタ装置 |
JPS59119319U (ja) * | 1983-01-31 | 1984-08-11 | 株式会社土屋製作所 | 排気ガスフイルタ装置 |
JPS63117115A (ja) * | 1986-11-04 | 1988-05-21 | Matsushita Electric Ind Co Ltd | デイ−ゼル排ガス浄化装置 |
Also Published As
Publication number | Publication date |
---|---|
US5458664A (en) | 1995-10-17 |
EP0603392A4 (ja) | 1994-08-31 |
DE69216101D1 (de) | 1997-01-30 |
EP0603392A1 (en) | 1994-06-29 |
DE69216101T2 (de) | 1997-07-17 |
EP0603392B1 (en) | 1996-12-18 |
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