WO2019212030A1 - Substrat support de catalyseur, corps de support de catalyseur, dispositif d'épuration de gaz d'échappement, composant de passage d'échappement, procédé de moulage de substrat support de catalyseur, et procédé de fabrication/assemblage de dispositif d'épuration de gaz d'échappement - Google Patents

Substrat support de catalyseur, corps de support de catalyseur, dispositif d'épuration de gaz d'échappement, composant de passage d'échappement, procédé de moulage de substrat support de catalyseur, et procédé de fabrication/assemblage de dispositif d'épuration de gaz d'échappement Download PDF

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Publication number
WO2019212030A1
WO2019212030A1 PCT/JP2019/017622 JP2019017622W WO2019212030A1 WO 2019212030 A1 WO2019212030 A1 WO 2019212030A1 JP 2019017622 W JP2019017622 W JP 2019017622W WO 2019212030 A1 WO2019212030 A1 WO 2019212030A1
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WIPO (PCT)
Prior art keywords
catalyst
exhaust gas
exhaust
purification device
gas purification
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PCT/JP2019/017622
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English (en)
Japanese (ja)
Inventor
石澤　登
英樹 高塚
康光 望月
加藤　正
隆時 南
Original Assignee
株式会社榛葉鉄工所
ニチダイフィルタ株式会社
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Priority to JP2020517060A priority Critical patent/JP7396596B2/ja
Publication of WO2019212030A1 publication Critical patent/WO2019212030A1/fr

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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
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • 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
    • 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

Definitions

  • the present invention relates to a purification device, exhaust path components, a method for forming a catalyst-supporting base material, and a method for manufacturing and assembling an exhaust gas purification device.
  • an effective arrangement corresponding to the temperature distribution of exhaust gas in the exhaust path is possible and pressure loss.
  • the present invention relates to a method for forming a catalyst-supporting base material and a method for manufacturing and assembling an exhaust gas purification device.
  • exhaust path parts are provided to exhaust the exhaust gas discharged from the engine to the outside.
  • the exhaust path parts of a motorcycle include an exhaust pipe that is curved at an upstream position close to the engine, a collecting pipe and a joint pipe at the downstream position, and a muffler (silencer) for reducing exhaust noise at the most downstream position.
  • a muffler for reducing exhaust noise at the most downstream position.
  • an exhaust gas purification device is arranged for the collecting pipe, the joint pipe, and the muffler that are easy to install.
  • a catalyst support 101 having a light ceramic honeycomb structure with a specific gravity of about 2.7 shown in FIG. 20A is mainly used for an automobile.
  • a catalyst support 103 having a heavy metal honeycomb structure with a specific gravity of about 8.0 shown in FIG. 20B is mainly used.
  • These catalyst carriers 101 and 103 have a cylindrical or cylindrical shape that is long in the axial direction Y along the exhaust path, and are provided with a large number of minute holes 105 penetrating in the axial direction Y. In addition, the size and number (mesh roughness) of the holes 105 are difficult to change secondarily due to the structure.
  • Patent Documents 1 and 2 below disclose an exhaust gas purifying apparatus including a catalyst carrier that is short in the axial direction Y and can be disposed on a curved exhaust path.
  • an exhaust gas purifying apparatus having a configuration in which a large number of disk-shaped catalyst carriers and porous filters are alternately arranged in a curved pipe line, and the above-described disk-shaped catalyst carrier and porous
  • An exhaust gas purification device having a configuration in which an annular metal ring is externally fitted to the outer peripheral portion of a filter and adjacent metal rings are connected by a bellows-like member is disclosed.
  • Patent Document 2 discloses an exhaust gas purifying apparatus having a configuration in which three disk-shaped foamed porous three-dimensional structure catalysts are disposed as a catalyst carrier in a curved pipe line. Moreover, in patent document 2, it replaces with the said disk-shaped foam porous three-dimensional structure catalyst, a cylindrical foam porous three-dimensional structure catalyst, a wire three-dimensional structure catalyst, and a punching metal three-dimensional structure It is disclosed that a catalyst can be used as a catalyst carrier.
  • JP 2007-138875 A Japanese Patent Laid-Open No. 10-212938
  • the catalyst carriers 101 and 103 that are long in the axial direction Y shown in FIGS. 20 (a) and 20 (b) can be arranged only on straight portions on the exhaust path such as the collecting pipe, the joint pipe, and the muffler. Therefore, it is not possible to oxidize or reduce harmful substances in the exhaust gas when the catalyst carrier 101 or 103 is cooled immediately after the engine is started. However, in order to improve this, the exhaust that is close to the engine and becomes hot If the catalyst carriers 101 and 103 can be installed in the pipe, the purification performance can be exhibited early from the cold start. However, since the exhaust port exit angle of the engine is horizontal or upward from the cylinder axis, the space efficiency is usually poor unless the exhaust pipe is largely bent.
  • the catalyst carriers 101 and 103 that are long in the axial direction Y cannot be installed in the exhaust pipe.
  • the catalyst support 103 having the metal honeycomb structure has a portion that is not used for purification of exhaust gas, and becomes heavy and expensive. Also, if it is installed too close to the engine, it may continue to be exposed to excessively high temperatures and be damaged.
  • the pipe line in which the catalyst carrier is provided is “halved” along its axial direction Y.
  • a plurality of catalyst carriers are arranged at predetermined positions, and the two pipe elements divided into two are overlapped or connected by a bellows-like member, and are manufactured by joining by welding or the like.
  • the number of welding parts increases, the productivity of the exhaust gas purification device deteriorates, and the cost of the exhaust gas purification device increases.
  • the catalyst carrier can be installed by being pushed into a tubular pipe that does not halve, the above-mentioned welding work can be eliminated, but simply pushing the catalyst carrier does not stabilize the posture, so that the desired position can be obtained. It is difficult to install a catalyst carrier. In addition, the catalyst carrier and the pipe cannot be sufficiently fixed.
  • the present invention has been made based on such points, and the object of the present invention is that it can be installed on both the straight portion and the curved portion of the exhaust gas exhaust path, and the installed pipe member is not divided in half.
  • the catalyst carrier can be accurately and reliably installed at a predetermined position, has excellent exhaust gas purification performance and purification adjustment capability, and is easy and low-cost to form and assemble a catalyst carrier substrate and exhaust gas purification device.
  • An object of the present invention is to provide a catalyst-supporting base material, a catalyst-supporting body, an exhaust gas purification device, an exhaust path component, a method for forming the catalyst-supporting base material, and a method for manufacturing and assembling the exhaust gas purification device.
  • a catalyst-supporting substrate according to claim 1 of the present invention is provided in the middle of an exhaust path for exhaust gas exhausted from an engine to the outside, and is contained in the exhaust gas exhausted. It is a catalyst-supporting substrate that comes into contact with the plate, and uses a plate-shaped member of a metal porous structure that can be plastically processed by stacking a plurality of mesh-structured sheets and then sintering them. The material is curved and formed into a three-dimensional shape having a convex shape on the front end side and a concave shape on the rear end side.
  • the catalyst-carrying substrate according to claim 2 is the catalyst-carrying substrate according to claim 1, wherein the convex shape on the tip side of the catalyst-carrying substrate is a three-dimensional projection whose diameter gradually decreases toward the tip. It is formed in a shape.
  • the catalyst carrier according to claim 3 of the present invention is provided in the middle of an exhaust path for exhausting exhaust gas discharged from the engine to the outside, and oxidizes and reduces harmful substances contained in the exhaust gas discharged.
  • an exhaust gas purification apparatus provided in the middle of an exhaust path for exhausting exhaust gas discharged from an engine to the outside, and oxidizing and reducing harmful substances contained in the discharged exhaust gas.
  • An exhaust gas purifying device for purifying the catalyst comprising: the catalyst carrier according to claim 3; and a tubular member that is part of the exhaust path and into which the catalyst carrier is fitted. The carrier is inserted into the tubular member, and the catalyst carrier and the tubular member are joined in a state where the carrier has reached a predetermined position.
  • the exhaust gas purifying apparatus according to claim 5 is the exhaust gas purifying apparatus according to claim 4, wherein the exhaust gas purifying apparatus is provided for an exhaust pipe which is a tubular member located upstream of the exhaust path close to the engine. It is characterized in that the function of the catalyst is exhibited early from the cold start.
  • the exhaust gas purifying apparatus according to claim 6 is the exhaust gas purifying apparatus according to claim 4 or 5, wherein a plurality of the catalyst carriers are arranged at intervals with respect to a single tubular member. It is characterized by this.
  • the exhaust gas purifying apparatus 1 according to claim 7 is the exhaust gas purifying apparatus according to any one of claims 4 to 6, wherein the exhaust gas purifying apparatus is arranged in a plurality of sets at different locations with respect to the exhaust path. It is characterized by being.
  • An exhaust gas purifying apparatus is the exhaust gas purifying apparatus according to claim 6 or 7, wherein the catalyst carrier has an optimum catalyst composition for each harmful substance to be oxidized and reduced. In the case where a plurality of the catalyst carriers are arranged, they are arranged separately in the optimum temperature range corresponding to the harmful substances to be oxidized / reduced.
  • the exhaust gas purifying apparatus is the exhaust gas purifying apparatus according to any one of claims 4 to 8, wherein the tubular member and the catalyst supporting substrate are both formed of metal, and the tubular member The peripheral part of the catalyst carrier to be joined in contact with the inner wall surface is compressed in the radial direction and joined in a state of being crushed into a thin wall.
  • An exhaust path component according to claim 10 of the present invention is an exhaust path component including an exhaust pipe, a collecting pipe, a joint pipe, and a muffler that exhausts exhaust gas discharged from an engine to the outside.
  • the exhaust gas purifying device according to any one of claims 4 to 9 is provided in one or a plurality of the collecting pipe and the joint pipe.
  • An exhaust path component according to claim 11 is an exhaust path component including an exhaust pipe, a collecting pipe, a joint pipe, and a muffler that exhausts exhaust gas discharged from the engine to the outside.
  • the exhaust gas purification device according to any one of claims 4 to 9 is provided as one exhaust gas purification device, and a ceramic honeycomb structure or a second exhaust gas purification device for the collecting pipe, the joint pipe or the muffler is provided.
  • the present invention is characterized in that an exhaust gas purification device having a columnar or cylindrical shape that is long in the axial direction using a catalyst carrier having a metal honeycomb structure is provided.
  • the catalyst-supporting substrate molding method according to claim 12 of the present invention is a method for molding a three-dimensional catalyst-supporting substrate having a convex shape on the front end side and a concave shape on the rear end side, the metal porous structure
  • a step of drawing a plate-shaped material to form a three-dimensional intermediate molded product having a convex shape on the front side and a concave shape on the rear side, and after crushing and compressing the peripheral edge of the intermediate molded product A step of forming an end portion, and a step of forming a thin joint portion by raising the rear end portion and molding the thin molded portion into a final molded product.
  • an exhaust gas purification device manufacturing / assembling method comprising a catalyst carrier using a three-dimensional catalyst carrier having a convex shape on the front end side and a concave shape on the rear end side.
  • a method for manufacturing and assembling an exhaust gas purifying apparatus comprising: producing an exhaust gas purifying apparatus; and assembling the exhaust gas purifying apparatus at a predetermined position of a tubular member constituting an exhaust path of exhaust gas discharged from an engine.
  • a fourteenth aspect of the present invention there is provided a method for manufacturing and assembling an exhaust gas purifying device according to the thirteenth aspect, wherein the catalyst carrier is inserted into a tubular member in the assembling step.
  • a catalyst is used by using a pusher having an insertion head at the tip, and a cored bar in which a plurality of cored bar pieces are connected in a bendable manner by a connecting body on the base end side of the insertion head.
  • the carrier is inserted.
  • the catalyst-carrying substrate according to the present invention since a plate-like member having a metal porous structure is used as a material, the catalyst-carrying substrate can be easily produced at a low cost and in a compact manner regardless of the number of places and the number. It becomes possible to mold. Further, as the material, a material that can be plastically processed by stacking a plurality of mesh-structured sheets and then sintering can be applied. This material forms a porous body by adjusting the size of the metal wire to the required mesh size, and sinters this to bond at the contact point and intersection made by the metal wire, and even in plastic processing A three-dimensional structure and porosity can be maintained without breaking. In addition, since this material is manufactured by sintering, it can withstand use under high temperatures where the brazing solder melts.
  • the thickness of the metal wire and the number of meshes can be freely selected. For this reason, it is possible to select a thick metal wire for the purpose of improving the catalyst purification performance of the exhaust gas, and to increase the number of meshes. In this case, the flow area through which the exhaust gas flows decreases and the pressure loss increases, resulting in a deterioration in vehicle performance. In the case of a flat plate member, this problem can be avoided by increasing the diameter, but it is difficult to implement as a mounting part in the tubular member.
  • the exhaust gas flow area is increased compared to the flat plate member even though it has the same diameter by forming it into a three-dimensional shape with a convex shape at the tip and a concave shape at the rear end. And increase in pressure loss can be mitigated. Further, if the purification performance is equivalent to that of the flat plate member, even if the mesh is coarse, the contact area with the exhaust gas passing through can be kept equal, so that the pressure loss can be kept low.
  • the catalyst-supporting body in which the catalyst is supported on the catalyst-supporting substrate can be performed smoothly.
  • the catalyst carrier of the present invention stable catalyst purification performance can be exhibited for exhaust gas passing through the strong connection between the metal wires forming the mesh structure.
  • the amount of catalyst supported increases and the catalyst purification capability also improves.
  • the exhaust gas purifying apparatus of the present invention since the catalyst carrier in which the catalyst is carried on the catalyst carrying substrate obtained by shaping the plate-like material of the metal porous structure into a three-dimensional shape is used, the cost is low. It is possible to apply a catalyst carrier that is compact and does not require any number of places and numbers. Further, by increasing the contact area with respect to the exhaust gas, it is possible to increase the catalyst carrying amount and improve the catalyst purification ability.
  • the exhaust gas purification device when the exhaust gas purification device is provided for an exhaust pipe, which is a tubular member located upstream of the exhaust path close to the engine, when the catalyst function is exhibited early from the cold start, Since the purification of harmful substances becomes active and the exhaust gas purification device can be arranged in a higher temperature range, the conversion efficiency of the catalyst carried on the catalyst carrier increases, and the exhaust gas produced by the catalyst is exhausted. Gas purification performance is improved.
  • the conventional honeycomb-structured catalyst carrier is cold, such as immediately after the engine is started, it is not possible to oxidize or reduce harmful substances in the exhaust gas, but the catalyst carrier is located in the exhaust pipe that is closer to the engine and gets hot. Because it can be installed, purification performance can be expected quickly from cold start.
  • the exhaust gas purification device is light in weight and inexpensive. Moreover, even if it continues to be exposed to an excessively high temperature by installing it at a position close to the engine, there is no fear of breakage because there is no brazed part.
  • the exhaust pipe which is a component of the exhaust path
  • the exhaust gas purifying device is unitized and a part of the existing exhaust path is cut off.
  • the exhaust gas purification device in a form that is retrofitted with a unitized exhaust gas purification device at the excised portion.
  • the catalyst carrier is configured to have an optimal catalyst composition for each hazardous substance to be oxidized / reduced, and when installed separately in the optimum temperature range corresponding to the hazardous substance to be oxidized / reduced, It is possible to provide an exhaust gas purification apparatus capable of further improving the exhaust gas purification performance by the catalyst composition and arrangement excellent in the purification performance corresponding to the type of harmful substances.
  • both the tubular holding member and the catalyst supporting substrate are formed of metal, and the peripheral portion of the catalyst supporting body joined in contact with the inner wall surface of the tubular member is compressed in the radial direction and crushed into a thin wall.
  • the tubular member and the catalyst-carrying base material can be joined easily and reliably, and the joined state of both is strengthened by increasing the contact area of the joined portion.
  • the exhaust gas purifying device according to the present invention having the above-described effects is provided in any one or more of the exhaust pipe, the collecting pipe, and the joint pipe, so that the increase in pressure loss is minimized. It is possible to provide an exhaust path component that can stably suppress and exhibit excellent catalyst purification performance. Further, the exhaust gas purification device of the present invention having the above-described effect is provided as the first exhaust gas purification device with respect to the exhaust pipe, and the existing honeycomb as the second exhaust gas purification device with respect to the collecting pipe, the joint pipe and the muffler.
  • the catalyst having the exhaust gas purifying device of the present invention is added to the catalyst purifying performance of the exhaust gas purifying device of the existing honeycomb structure, and the catalyst of the exhaust path component The purification performance can be improved.
  • a tertiary structure in which the tip side has a convex shape and the rear end side has a concave shape by utilizing the characteristics of the network structure of the metal wire material of the mesh-like material capable of plastic working. It becomes possible to easily mold the original shaped intermediate molded product.
  • a step of forming a compressed rear end portion by crushing the peripheral edge portion of the intermediate molded product a step of forming a thin joint by raising the rear end portion, and forming a final molded product
  • the catalyst-supporting base material molded in the predetermined three-dimensional shape
  • the catalyst-supporting base material allows the catalyst to be supported, so that even if the mesh is rougher than the flat plate member, the catalyst can pass through. Since the contact area with the exhaust gas to be maintained can be kept equal, the pressure loss can be kept as low as possible and a catalyst carrier excellent in catalyst purification performance can be obtained.
  • the molded catalyst carrier has a convex shape on the tip side that can be easily inserted into a tubular member and moved to a predetermined position, the catalyst carrier can be smoothly assembled in the assembly process. Will come to be.
  • a pushing tool having a bead-like cored bar having an insertion head at the distal end, a plurality of cored bar pieces on the base end side of the insertion head, and a connecting body for connecting them.
  • the tubular member into which the catalyst carrier is inserted is not limited to a straight tubular shape but can be applied to a curved tubular shape so that the catalyst carrier can be accurately and smoothly placed at a predetermined position of the tubular member. It becomes possible to join to the tubular member.
  • FIG. 2 is a diagram showing a first embodiment of the present invention, and is a perspective view showing an exhaust path component including a muffler in which the catalyst carrier of the present invention is applied to an exhaust pipe.
  • 1 is a partially broken perspective view showing a state in which a catalyst carrier of the present invention is applied to an upstream end portion of an exhaust pipe, showing a first embodiment of the present invention.
  • FIG. It is a figure which shows the 1st Embodiment of this invention, and is an exploded perspective view which shows the exhaust-gas purification apparatus of this invention. It is a figure which shows the 1st Embodiment of this invention, and is a sectional side view which shows the exhaust-gas purification apparatus of this invention.
  • FIG. 1 is a partially broken perspective view showing a state in which a catalyst carrier of the present invention is applied to an end portion on the downstream side of an exhaust pipe, showing a first embodiment of the present invention.
  • FIG. 1 is a partially broken perspective view showing a state in which a catalyst carrier of the present invention is applied to both an upstream end and a downstream end of an exhaust pipe, showing a first embodiment of the present invention. . It is a figure which shows the 1st Embodiment of this invention and is explanatory drawing which shows the shaping
  • FIG. 17 which shows the exhaust-gas purification apparatus of this invention
  • sectional drawing (a) which shows the example of joining by plug welding.
  • sectional side view (b) which shows the example of joining by arc spot welding.
  • FIG. 17 shows the exhaust-gas purification apparatus of this invention
  • sectional drawing (a) which shows the example of joining by plug welding.
  • sectional side view (b) which shows the example of joining by arc spot welding.
  • FIG. 17 shows the exhaust-gas purification apparatus of this invention
  • b shows the example of joining by arc spot welding.
  • FIG. 6 the configuration of the material will be described based on FIG. 6, and the configuration of the catalyst-carrying substrate will be specifically described based on FIG. 7 (a). Moreover, the structure of a catalyst carrier is demonstrated based on FIG.7 (b). Next, differences between the present exhaust gas purification device having a honeycomb structure and the exhaust gas purification device of the present invention will be described based on FIGS. 2 to 9, 15 and 20, and the exhaust gas purification device of the present invention will be described. Mention action and effect.
  • FIG. 1 shows an exhaust path component 19 connected to an engine E for a motorcycle. After one end 21 is connected to the engine E, the exhaust path component 19 is connected to a plurality of exhaust pipes 11 that are greatly curved and extend rearward and the other ends 23 of these exhaust pipes 11.
  • the collecting pipe 13, the joint pipe 14, and the muffler 15 connected to the joint pipe 14 and functioning as a silencer for reducing exhaust noise are configured as an example.
  • an exhaust gas purification device 1A according to the present embodiment, which will be described later, is provided as a first exhaust gas purification device with respect to the exhaust pipe 11, and the above-described collecting pipe 13, joint pipe 14, and muffler 15 are provided.
  • an exhaust path component 19 having a structure in which a catalyst support body 101 having a ceramic honeycomb structure and a catalyst support body 103 having a metal honeycomb structure, which will be described later, is provided as a second exhaust gas purification device is illustrated.
  • the exhaust gas purification device 1 of the present invention is provided in the middle of an exhaust path for exhausting the exhaust gas G exhausted from the engine E to the outside, and oxidizes and reduces the harmful substance C contained in the exhaust gas G exhausted. It is a device to purify.
  • An exhaust gas purifying apparatus 1A according to the present embodiment includes a catalyst carrier 7 according to the present embodiment, which will be described later, a tubular member 9 that forms part of the exhaust path and into which the catalyst carrier 7 is fitted, The catalyst carrier 7 is inserted into the tubular member 9, and the catalyst carrier 7 and the tubular member 9 are joined in a state of reaching a predetermined position.
  • the exhaust gas purification device 1A uses the exhaust pipe 11 itself, which is located upstream of the exhaust path close to the engine E, as the tubular member 9.
  • one to a plurality of catalyst carriers 7 are arranged at intervals with respect to the single tubular member 9.
  • the plurality of catalyst carriers 7 are provided as an example with respect to one end 21 which is an upstream end portion of the exhaust pipe 11.
  • the plurality of catalyst carriers 7 may be provided on the other end 23 which is the downstream end of the exhaust pipe 11 as shown in FIG. 8, and the exhaust pipe as shown in FIG. 11 can be provided for both one end 21 and the other end 23.
  • the material 4 includes, as an example, a sheet 3 having a mesh structure formed by knitting a plurality of metal wires in a lattice shape as a main component. Then, a plurality of sheets 3 having such a mesh structure are overlapped and then sintered to form a plate-like material 4, and this material 4 is punched or laser matched to the shape of the catalyst-supporting substrate. The material cut by the above is used as the material 4 of the catalyst-supporting substrate.
  • a material 4 there is a base material of a catalyst carrier for purifying exhaust gas as disclosed in JP 2011-230016, and this base material of the catalyst carrier is used as the material 4. This is possible as an example.
  • the catalyst-supporting substrate 5 of the present invention is provided in the middle of an exhaust path for exhausting the exhaust gas G exhausted from the engine E to the outside, and contacts the harmful substance C contained in the exhaust gas G exhausted. It is a member that promotes reaction.
  • the material 4 is curved and formed into a three-dimensional shape having a convex shape on the front end 5a side and a concave shape on the rear end 5b side.
  • the convex shape on the tip 5a side of the catalyst supporting substrate 5 is formed into a three-dimensional convex shape whose diameter gradually decreases toward the tip.
  • a streamline shape having a somewhat longer axial direction Y, a cone shape or a truncated cone shape, etc. can be adopted. is there.
  • the tubular member 9 and the catalyst-carrying substrate 5 are both made of metal, and the peripheral portion 41 of the catalyst-carrying substrate 5 joined in contact with the inner wall surface 9a of the tubular member 9 is in the radial direction X.
  • the shape is compressed and crushed into a thin wall.
  • tip 5a of the catalyst support base material 5 except the said peripheral part 41 becomes the main-body part 40.
  • the catalyst carrier 7 of the present invention is provided in the middle of the exhaust path for exhausting the exhaust gas G exhausted from the engine E, and oxidizes and reduces the harmful substance C contained in the exhaust gas G exhausted. It is a member to purify. Specifically, it is formed by supporting a catalyst B that oxidizes and reduces the harmful substance C on the catalyst supporting substrate 5 shown in FIG.
  • the material 4 is formed by superimposing a plurality of sheets 3, and the catalyst-supporting substrate 5 formed using the material 4 is also configured by superimposing the sheets 3.
  • the optimal catalyst loading performance can be exhibited for each harmful substance C to be oxidized / reduced by changing the mesh roughness. It can be configured as follows.
  • examples of the harmful substance C that is oxidized / reduced by supporting the catalyst B on the catalyst supporting substrate 5 include hydrocarbon (HC), carbon monoxide (CO), nitrogen oxide (NOx), and the like.
  • a catalyst B for oxidizing / reducing the harmful substance C platinum, platinum (Pt), palladium (Pd) and rhodium (Rh) are used as the core, and auxiliary catalysts for assisting these are silver, manganese, iron, cobalt
  • copper, vanadium, zinc, iridium (Ir), or the like can be used.
  • the plurality of catalyst carriers 7 are configured to have an optimum composition of the catalyst B for each harmful substance C to be oxidized / reduced, and are divided into optimum temperature ranges corresponding to the harmful substances C to be oxidized / reduced. Are preferably installed.
  • three catalyst carriers 7A, 7B, 7C provided as an example are made of heat-resistant steel such as SUS310 as an example, and these catalyst carriers 7A, 7B, 7C and the tubular member 9 are formed.
  • the joining is performed by arc welding, resistance welding, laser welding or the like.
  • a catalyst carrier 103 having a honeycomb structure is often used. Since these catalyst carriers 101 and 103 have a columnar or cylindrical shape that is long in the axial direction Y, they cannot be installed on the curved exhaust pipe 11 close to the engine E, and are straight tubular collecting pipes far from the engine E. 13, a joint pipe 14, and a muffler 15.
  • the temperature of the exhaust gas G becomes high near the engine E, while the temperature of the exhaust gas G is low in the collecting pipe 13, the joint pipe 14, and the muffler 15. It has become. Therefore, it can be determined that the high temperature portion shown in FIG. 15 is a region where the temperature rise from the cold start is fast.
  • the exhaust gas purifying apparatus 1 is separately provided for the curved tubular member 9 such as the exhaust pipe 11 by adopting the catalyst-supporting base material 5 having the three-dimensional convex shape on the tip 5a side.
  • the exhaust gas purification device 1 can be installed without using any of the above members.
  • the plurality of catalyst carriers 7 are provided by changing the mounting position, when the temperature range in which the operation of the harmful substance C contained in the exhaust gas G becomes active is different, The catalyst carrier 7 can be provided by being distributed to positions corresponding to the respective temperature ranges.
  • the exhaust gas purifying apparatus 1A can be installed not only on the straight part of the exhaust path of the exhaust gas G but also on the curved part, and without halving the tubular member 9 to be installed, the catalyst carrier 7 can be accurately and reliably installed at a predetermined position.
  • an exhaust gas purification device 1A is provided as a first exhaust gas purification device for the exhaust pipe 11, and a second exhaust gas is provided for the collecting pipe 13, the joint pipe 14, and the muffler 15.
  • a ceramic honeycomb structure catalyst carrier 101 and a metal honeycomb structure catalyst carrier 103 are provided.
  • the exhaust gas purifying apparatus 1A is used as an auxiliary to the catalyst supporting body 101 having a ceramic honeycomb structure and the catalyst supporting body 103 having a metal honeycomb structure.
  • the exhaust gas purification device 1A of the present invention having the above-described effect is provided as the first exhaust gas purification device for the exhaust pipe 11, and the second exhaust gas is provided for the collecting pipe 13, the joint pipe 14 and the muffler 15.
  • the exhaust gas purification device 1A of the present invention has the catalyst purification performance of the existing exhaust gas purification devices 101 and 103 having the honeycomb structure.
  • the catalyst purification performance of the exhaust path component can be improved by adding the catalyst purification performance of the exhaust path component.
  • an exhaust pipe or the like that is a component of the exhaust path can be used as the tubular member. It is also possible to arrange the exhaust gas purification device 1 in such a manner that a part of the exhaust path is cut out and the unitized exhaust gas purification device 1 is retrofitted.
  • a catalyst carrier 7 is disposed and joined in a cylinder provided with an exhaust gas purification device side mounting flange F1 having mounting holes on both sides, and an existing one is used.
  • a part of the exhaust pipe 11 is cut off, and an exhaust pipe side mounting flange F2 having a mounting hole facing the exhaust gas purification device side mounting flange F1 is provided, and both mounting flanges F1 and F2 are abutted to each other. It is connected by a nut N.
  • the exhaust gas purification device 1 can be easily attached to the exhaust pipe 11.
  • the method for forming a catalyst-supporting substrate according to the present invention is a method for forming a three-dimensional catalyst-supporting substrate having a convex shape on the front end side and a concave shape on the rear end side, and a plate-shaped material having a metal porous structure.
  • the molded catalyst-supporting base material 5 is formed with a hemispherical main body 40 protruding downward and a thin peripheral edge 41 from the base of the main body 40 upward.
  • the method for manufacturing and assembling the exhaust gas purifying apparatus of the present invention includes an exhaust gas provided with a catalyst carrier 7 using a three-dimensional catalyst carrier 5 having a convex shape on the front end 5a side and a concave shape on the rear end 5b side.
  • Manufacture and assembly of the exhaust gas purification device 1 by manufacturing the purification device 1 and assembling the exhaust gas purification device 1 at a predetermined position of the tubular member 9 constituting the exhaust path of the exhaust gas G discharged from the engine E
  • the method basically includes a catalyst supporting step P1 and an assembly step P2.
  • the contents of the catalyst supporting process P1 and the assembling process P2 will be specifically described along the flow of manufacturing and assembling of the exhaust gas purifying apparatus 1A.
  • the catalyst supporting step P1 is a step of obtaining the catalyst supporting body 7 by supporting the catalyst supporting base 5 with the catalyst B that oxidizes and reduces the harmful substance C. That is, the catalyst B is supported by applying, spraying, or immersing the catalyst B on the catalyst supporting substrate 5 formed by the above-described catalyst supporting substrate forming method.
  • the timing for loading the catalyst B can be performed at the stage of the raw material 4 before molding, in addition to the catalyst supporting substrate 5 after molding.
  • the assembling step P2 is a step of assembling the catalyst carrier 7 to the tubular member 9 by inserting the catalyst carrier 7 carrying the catalyst B into the tubular member 9 and joining it to a predetermined position of the tubular member 9. That is, in the present embodiment, the catalyst carrier 7C is inserted from one end 21 of the tubular member 9 with the tip 5a side of the catalyst carrier 5 as the starting end. When the catalyst carrier 7C is inserted to a predetermined position, the insertion is stopped, and the peripheral portion 41 of the catalyst carrier 7C and the tubular member 9 with the inner wall surface 9a in contact with the peripheral portion 41 are connected from the outside of the tubular member 9. Join by welding.
  • the catalyst carrier 7B and the catalyst carrier 7A are sequentially inserted into the tubular member 9 and joined to predetermined positions by welding, the manufacture and assembly of the exhaust gas purification device 1A are completed.
  • the insertion device 55 and the holding device 57 shown in FIGS. 12 and 13 are used as an example.
  • the tubular member 9 is placed and supported on placing tables 59 and 59 arranged in accordance with the shape of the tubular member 9.
  • a clamp 61 that is a component of the holding device 57 that holds the one end 21 is disposed.
  • the clamp 61 is configured as an example by including a fixed clamp 63 and a movable clamp 65.
  • the movable clamp 65 moves forward or backward to move one end of the tubular member 9. It is comprised so that 21 may be clamped and hold
  • the insertion device 55 is supported by the mounting tables 59 and 59 described above, and the insertion head 69 is provided in a state where the axes coincide with each other so as to face the one end 21 of the tubular member 9 whose one end 21 is held by the holding device 57.
  • the operation switch 75 is operated to retract the insertion head 69, and the lever switch 67 is operated to retract the movable clamp 65 to release the clamp. Then, the tubular member 9 in which the catalyst carrier 7 is inserted is removed from the holding device 57, and the tubular member 9 and the inserted catalyst carrier 7 are welded and joined from the outside of the tubular member 9 as described above.
  • a welding method for example, arc welding, resistance welding, laser welding or the like is performed.
  • the exhaust gas purifying apparatus 1 having the above excellent characteristics can be easily manufactured, and the manufactured exhaust gas purifying Since the apparatus 1 can smoothly move in the tubular member 9 due to the three-dimensional shape of the catalyst supporting substrate 5, the catalyst supporting body 7 can be attached to the tubular member 9 that is curved like the exhaust pipe 11.
  • the tubular member 9 can be easily assembled by accurately moving to a predetermined position. Further, when the catalyst carrier 7 is moved deep into the tubular member 9, a pushing tool 80 in which a metal core 87 is attached to the insertion head 81 as shown in FIG. 14 is used.
  • the pusher 80 includes an insertion head 81 that fits into the recess 7 a of the catalyst carrier 7 at the tip, and a cored bar 87 that is connected to the base end side of the insertion head 81. Further, the cored bar 87 is configured as an example by connecting a plurality of ring-shaped cored bar pieces 83 in a beaded manner in a state where the cored bar 83 can be bent by the connecting body 85.
  • the exhaust gas purifying apparatus 1B according to the second embodiment of the present invention includes a plurality of catalyst carriers 7 provided for a single tubular member 9 in the exhaust gas purifying apparatus 1A according to the first embodiment described above.
  • the exhaust gas purification device 1B is arranged in a plurality of sets at different locations with respect to the exhaust path. Therefore, the description of the configuration common to the first embodiment is omitted here, and the description will focus on the specific configuration of the present embodiment described above.
  • the exhaust gas purifying apparatus 1B is configured such that the catalyst carrier 7 can be installed on an exhaust path component 19 that is long in the axial direction and curved, such as the exhaust pipe 11.
  • three sets of exhaust gas purifying devices 1B having the same configuration are provided at three locations on the upstream side, the middle portion, and the downstream side of the exhaust pipe 11, and each exhaust gas purifying device 1B has one set.
  • a total of three catalyst carriers 7D, 7E, 7F are arranged one by one. And when the temperature range where the action
  • the catalyst carrier 7 when the catalyst carrier 7 is assembled to the exhaust pipe 11, it can be inserted from one end or the other end of the exhaust pipe 11 and held at a predetermined position.
  • the above-described insertion device 55 and holding device 57 are used as an example, but the above-described FIG. 14 is used instead of the insertion head 69 of the insertion device 55.
  • the exhaust gas purification device 1B can be inserted into the exhaust pipe 11 using the insertion head 81 having the structure shown in FIG. is there.
  • the structure of this pushing tool 80 employ
  • the exhaust pipe 11 into which the exhaust gas purification device 1B is inserted is removed from the holding device 57, and the catalyst carrier 7 is welded and joined to the exhaust pipe 11 as described above.
  • a plurality of welding holes are provided in advance at appropriate positions of the exhaust pipe 11, and the inserted catalyst carrier 7 and the periphery of the holes are plug welded 79A by arc welding. Join.
  • the attachment position of the catalyst carrier 7 is defined by the position of the hole, the catalyst carrier 7 can be joined while being accurately positioned when inserted into the exhaust pipe 11.
  • the exhaust gas purification device 1B according to the present embodiment configured as described above can exhibit the same operations and effects as the exhaust gas purification device 1A according to the first embodiment described above.
  • the structure is simple and the manufacture is easy, and the exhaust pipe 11 can be easily assembled and joined, and can be manufactured at low cost.
  • the required number of catalyst carriers 7 can be attached to any position of the exhaust pipe 11, and the exhaust gas G purification ability can be maximized.
  • the catalyst-carrying substrate 5, the catalyst carrier 7, the exhaust gas purification device 1, the exhaust path component 19, the method for forming the catalyst-carrying substrate and the method for manufacturing and assembling the exhaust gas purification device according to the present invention are described above.
  • the present invention is not limited to this, and can be changed within the gist of the invention.
  • any material that can be drawn can be used, such as porous metal or lotus metal. It is also possible to use a porous metal formed into a disk shape.
  • the catalyst-supporting substrate 5 has a configuration in which the tip described in the above-described embodiment is a spherical pressing portion and the rear end of the pressing portion is a thin joint, and the tip and rear It is also possible to adopt a configuration in which the end portions have the same thickness, or a configuration in which the thickness of the rear end portion gradually decreases with respect to the thickness of the front end portion. Further, as means for joining the catalyst carrier 7 to the tubular member 7, in addition to the method of welding the catalyst carrier 7 to the tubular member 9 described in the above-mentioned embodiment, the catalyst carrier 7 is connected to the end member or bellows. It is also possible to attach to the tube, insert them into the tubular member 9, and join the end member and the tubular member 9 by welding or the like.
  • a pusher having a bead-like cored bar having an insertion head at the tip, a plurality of cored bars on the base end side of the insertion head, and a connecting body for connecting them is used.
  • other pushing means such as a flexible tube can be used as the pushing tool.
  • the number of catalyst supports 7 is not limited to three as in the above-described embodiment, but may be one or two, or four or more.
  • the number of the exhaust gas purification devices 1 is not limited to one or three, but may be two or four or more.
  • the one end 21 of the tubular member 9 is not limited to the portion shown in the above-described embodiment, and may be, for example, a portion shifted slightly inward from the end portion as long as it is on the end portion side of the tubular member 9.
  • the joining is not limited to the joining by welding as described above, and other joining means such as brazing and caulking can be used.
  • the tubular member 9 showed the case where the exhaust pipe 11 was used as an example, the exhaust-gas purification apparatus 1 of this invention is shown in the components provided in the various exhaust paths provided according to the collection pipe 13 or the vehicle model to apply. It is also possible to install.
  • the material 4 has a disk shape, but the circle here is not limited to a perfect circle, but should have a shape corresponding to the shape of the application site, such as an ellipse or an ellipse. Is possible.
  • the catalyst-carrying substrate, catalyst carrier, exhaust gas purification device, exhaust path component, catalyst-carrying substrate molding method, and exhaust gas purification device manufacturing / assembling method of the present invention are provided in the exhaust gas discharged from the engine. It can be used in the production and use fields of exhaust gas purification devices that oxidize and reduce contained harmful substances and purify them. Especially, it can oxidize and reduce harmful substances effectively and suppress the increase in pressure loss as much as possible.
  • the present invention has applicability when it is desired to provide an exhaust gas purification device that is easy to assemble and inexpensive.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un dispositif d'épuration de gaz d'échappement utilisant un substrat support de catalyseur: qui peut être placé à la fois dans une partie linéaire et une partie incurvée d'un passage d'échappement pour gaz d'échappement de sorte que la fonction d'un catalyseur puisse être rapidement manifestée à partir d'un démarrage à froid; avec lequel un corps de support de catalyseur peut être placé de manière précise et fiable à une position prescrite sans couper en deux un élément de conduit dans lequel le substrat support de catalyseur doit être placé; qui présente une excellente performance d'épuration de gaz d'échappement et une excellente capacité de réglage d'épuration; qui est facile à fabriquer et à assembler; et qui peut être fabriqué à faible coût. A cet effet, l'invention porte sur un substrat support de catalyseur (7) qui est disposé dans un passage d'échappement afin de décharger vers l'extérieur un gaz d'échappement G évacué à partir d'un moteur E; et entre en contact avec une substance toxique C comprise dans le gaz d'échappement G qui a été évacué. Le substrat support de catalyseur utilise, comme matériau (4), un élément en forme de plaque qui a une structure poreuse métallique façonnable plastiquement et qui est fabriqué par stratification et frittage d'une pluralité de feuilles de structure maillée (3), le substrat support de catalyseur étant obtenu par pliage et formation du matériau (4) en une forme tridimensionnelle dans laquelle un côté frontal (5a) présente une forme convexe et un côté extrémité arrière (5b) présente une forme concave.
PCT/JP2019/017622 2018-05-01 2019-04-25 Substrat support de catalyseur, corps de support de catalyseur, dispositif d'épuration de gaz d'échappement, composant de passage d'échappement, procédé de moulage de substrat support de catalyseur, et procédé de fabrication/assemblage de dispositif d'épuration de gaz d'échappement WO2019212030A1 (fr)

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CN112594038B (zh) * 2020-12-09 2022-07-12 江西安天高新材料股份有限公司 一种抗菌蜂窝陶瓷转化设备

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JP2001105034A (ja) * 1999-10-12 2001-04-17 Mitsubishi Heavy Ind Ltd パイプベンダー
JP2005171823A (ja) * 2003-12-09 2005-06-30 Mikuni Corp 触媒担持体及び触媒装置並びにエンジンの排気装置
JP2011230016A (ja) * 2010-04-23 2011-11-17 Nichidai Filter Corp ガソリンエンジン用排気ガス浄化装置の触媒担持体の基材と触媒担持体の製造方法
JP2013238145A (ja) * 2012-05-14 2013-11-28 Fuji Heavy Ind Ltd 排気ガス浄化装置
JP2017177033A (ja) * 2016-03-31 2017-10-05 三恵技研工業株式会社 触媒担体及びその製造方法、並びに排気浄化装置

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