JP2010071240A - Exhaust gas purifying device for internal combustion engine, and swirl flow generating device - Google Patents

Exhaust gas purifying device for internal combustion engine, and swirl flow generating device Download PDF

Info

Publication number
JP2010071240A
JP2010071240A JP2008241382A JP2008241382A JP2010071240A JP 2010071240 A JP2010071240 A JP 2010071240A JP 2008241382 A JP2008241382 A JP 2008241382A JP 2008241382 A JP2008241382 A JP 2008241382A JP 2010071240 A JP2010071240 A JP 2010071240A
Authority
JP
Japan
Prior art keywords
exhaust gas
internal combustion
combustion engine
swirl flow
blades
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2008241382A
Other languages
Japanese (ja)
Inventor
Masaki Shimizu
雅樹 清水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Roki Co Ltd
Original Assignee
Tokyo Roki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Roki Co Ltd filed Critical Tokyo Roki Co Ltd
Priority to JP2008241382A priority Critical patent/JP2010071240A/en
Priority to US13/063,039 priority patent/US20110185710A1/en
Priority to EP09814449A priority patent/EP2325451A4/en
Priority to CN2009801339829A priority patent/CN102137991A/en
Priority to PCT/JP2009/065168 priority patent/WO2010032604A1/en
Publication of JP2010071240A publication Critical patent/JP2010071240A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
    • B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
    • B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4315—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B01F25/43162—Assembled flat elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
    • B01F25/431974—Support members, e.g. tubular collars, with projecting baffles fitted inside the mixing tube or adjacent to the inner wall
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/086—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling having means to impart whirling motion to the gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
    • B04C2003/006—Construction of elements by which the vortex flow is generated or degenerated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust gas purifying device for an internal combustion engine provided with a swirl flow generation means having superior swirling force and small resistance, and to provide a swirl flow generation device having superior swirling force and small resistance. <P>SOLUTION: This exhaust gas purifying device 100 for an internal combustion engine is provided with an exhaust pipe 1, a reduction catalyst 2, a reducing agent supply means 3, and a swirl flow generation means 40. The swirl flow generation means 40 has two blades 410, 420 formed by dividing a substantially elliptic plate into two in the direction of the major axis thereof. The two blades 410, 420 are integrated together such that the two blades are rotated relative to each other about the minor axis of the plate so as to cross each other, and the two blades are mounted such that the direction of the major axis is parallel to the direction of flow of exhaust gas. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、内燃機関用の排ガス浄化装置、及び旋回流発生装置に関する。   The present invention relates to an exhaust gas purifying device and a swirling flow generating device for an internal combustion engine.

内燃機関用の排ガス浄化装置は、内燃機関から排出された排ガスを浄化するための装置である。この種の装置として、従来より、内燃機関から排出された排ガスが流れる排気管と、その排気管内に設けられ排ガスに含まれる窒素酸化物を還元浄化する還元触媒と、その還元触媒の上流側を流れる排ガスに還元剤を噴射供給する還元剤供給手段と、排気管内のうち還元触媒の上流側に設けられ排ガスに旋回流を発生させる旋回流発生手段と、を備えたものが知られている（特許文献１参照）。   An exhaust gas purification device for an internal combustion engine is a device for purifying exhaust gas discharged from the internal combustion engine. As this type of apparatus, conventionally, an exhaust pipe through which exhaust gas discharged from an internal combustion engine flows, a reduction catalyst provided in the exhaust pipe for reducing and purifying nitrogen oxides contained in the exhaust gas, and an upstream side of the reduction catalyst are provided. A reductant supply unit that injects a reductant into flowing exhaust gas and a swirl flow generation unit that is provided upstream of the reduction catalyst in the exhaust pipe and generates a swirl flow in the exhaust gas are known ( Patent Document 1).

図８は、このような従来技術に係る内燃機関用の排ガス浄化装置の一例を示す図であり、（ａ）は模式図、（ｂ）は（ａ）で示した主要部Ｖの拡大斜視図である。   FIG. 8 is a view showing an example of such an exhaust gas purifying apparatus for an internal combustion engine according to the prior art, in which (a) is a schematic view and (b) is an enlarged perspective view of a main part V shown in (a). It is.

図８（ａ）に示すように、内燃機関用の排ガス浄化装置１０は、排気管１と、還元触媒２と、還元触媒２の上流側を流れる排ガスに還元剤（尿素水など）を噴射供給する還元剤噴射ノズル３と、排気管１内のうち還元触媒２の上流側（具体的には、還元剤噴射ノズル３によって還元剤が排ガスに噴霧される箇所（同図の「還元剤噴霧部」参照）の上流側）に設けられ排ガスに旋回流を発生させる旋回流発生手段４と、を備えている。また、図８（ｂ）に示すように、旋回流発生手段４は、支柱４１と、羽根４２とを備え、排ガスに乱流若しくは旋回流を起こして、還元剤の排ガスへの拡散を促進するフィン構造体である。   As shown in FIG. 8 (a), the exhaust gas purification apparatus 10 for an internal combustion engine injects and supplies a reducing agent (such as urea water) to the exhaust pipe 1, the reduction catalyst 2, and the exhaust gas flowing upstream of the reduction catalyst 2. The reducing agent injection nozzle 3 and the upstream side of the reduction catalyst 2 in the exhaust pipe 1 (specifically, the place where the reducing agent is sprayed on the exhaust gas by the reducing agent injection nozzle 3 (“reducing agent spraying portion” in the figure) And swirl flow generation means 4 for generating a swirl flow in the exhaust gas. Further, as shown in FIG. 8B, the swirl flow generating means 4 includes a support column 41 and a blade 42, and causes turbulent flow or swirl flow in the exhaust gas to promote diffusion of the reducing agent into the exhaust gas. It is a fin structure.

このような内燃機関用の排ガス浄化装置１０にあっては、旋回流発生手段４によって、排ガスに乱流若しくは旋回流が生じて、還元剤の排ガスへの拡散が促進される。そのため、還元触媒２に対して還元剤を均一な状態で供給することが可能となり、その結果、所定の排ガス浄化性能が確保されることとなる。
特開２００６−２９２３３号公報 In such an exhaust gas purification apparatus 10 for an internal combustion engine, the swirl flow generating means 4 generates turbulent flow or swirl flow in the exhaust gas, and promotes diffusion of the reducing agent into the exhaust gas. Therefore, it is possible to supply the reducing agent in a uniform state to the reduction catalyst 2, and as a result, predetermined exhaust gas purification performance is ensured.
JP 2006-29233 A

ところで、旋回流発生手段４の旋回力を向上させることができれば、還元触媒に対して還元剤をより均一な状態で供給することが可能となり、その結果、排ガス浄化性能が向上することとなる。そのため、旋回流発生手段４の旋回力を向上させることが望ましい。   By the way, if the swirl force of the swirl flow generating means 4 can be improved, the reducing agent can be supplied in a more uniform state to the reduction catalyst, and as a result, the exhaust gas purification performance is improved. Therefore, it is desirable to improve the turning force of the turning flow generating means 4.

一方、排ガスが旋回流発生手段４を通過する際には、その旋回流発生手段４に大きな抵抗が生じるため、旋回流発生手段４には一定の強度が要求されることとなるが、この抵抗を低減させることができれば、旋回流発生手段４に要求される強度を低減させることができる。また、旋回流発生手段４の抵抗を低減させることができれば、内燃機関の燃費を改善することもできる。そのため、旋回流発生手段４の抵抗を低減させることが望ましい。   On the other hand, when the exhaust gas passes through the swirling flow generating means 4, a large resistance is generated in the swirling flow generating means 4. Therefore, the swirling flow generating means 4 is required to have a certain strength. Can be reduced, the strength required for the swirling flow generating means 4 can be reduced. Further, if the resistance of the swirling flow generating means 4 can be reduced, the fuel consumption of the internal combustion engine can be improved. Therefore, it is desirable to reduce the resistance of the swirl flow generating means 4.

しかしながら、旋回流発生手段４の旋回力を向上させようとすれば、当該旋回流発生手段４の抵抗が増大してしまう傾向にあり、他方、旋回流発生手段４の抵抗を低減させようとすれば、当該旋回流発生手段４の旋回力が低下してしまう傾向にある。   However, if the turning force of the swirling flow generating means 4 is to be improved, the resistance of the swirling flow generating means 4 tends to increase, while the resistance of the swirling flow generating means 4 is to be reduced. In this case, the turning force of the turning flow generating means 4 tends to decrease.

そのため、従来の技術にあっては、旋回流発生手段４の旋回力を向上させつつ、当該旋回流発生手段４の抵抗を低減させることができなかったのである。   Therefore, in the prior art, the resistance of the swirl flow generating means 4 cannot be reduced while improving the swirl force of the swirl flow generating means 4.

そこで、従来より、優れた旋回力を有し、抵抗の小さな旋回流発生手段を備えた内燃機関用の排ガス浄化装置の開発が望まれていた。また、このような内燃機関用の排ガス浄化装置の開発だけでなく、一般の排気管内にも設置することが可能であって、優れた旋回力を有し、抵抗の小さな旋回流発生装置それ自体の開発も望まれていたのである。   Therefore, conventionally, there has been a demand for the development of an exhaust gas purification apparatus for an internal combustion engine having an excellent swirl force and a swirl flow generating means having a small resistance. In addition to the development of an exhaust gas purifying device for such an internal combustion engine, it can be installed in a general exhaust pipe, and has a superior swirl force and a low resistance swirl flow generator itself. The development of was also desired.

本発明は、優れた旋回力を有し、抵抗の小さな旋回流発生手段を備えた内燃機関用の排ガス浄化装置を提供するとともに、優れた旋回力を有し、抵抗の小さな旋回流発生装置を提供することをも目的とする。   The present invention provides an exhaust gas purification device for an internal combustion engine having an excellent swirl force and having a swirl flow generating means having a small resistance, and a swirl flow generator having an excellent swirl force and a small resistance. It is also intended to provide.

上記課題を解決するために、本発明は、内燃機関から排出された排ガスが流れる排気管と、前記排気管内に設けられ前記排ガスに含まれる窒素酸化物を還元浄化する還元触媒と、前記還元触媒の上流側を流れる前記排ガスに還元剤を噴射供給する還元剤供給手段と、前記排気管内のうち前記還元触媒の上流側に設けられ前記排ガスに旋回流を発生させる旋回流発生手段と、を備えた内燃機関用の排ガス浄化装置であって、前記旋回流発生手段は、略楕円形状のプレートをその長軸方向に二分割してなる二枚の羽根を有し、これらの二枚の羽根が前記プレートの短軸を中心軸として相互に回転交差した状態で一体化され、前記長軸方向が前記排ガスの流れ方向と平行となるように配置されていることを特徴とする。   In order to solve the above problems, the present invention provides an exhaust pipe through which exhaust gas discharged from an internal combustion engine flows, a reduction catalyst provided in the exhaust pipe for reducing and purifying nitrogen oxides contained in the exhaust gas, and the reduction catalyst A reducing agent supply means for injecting and supplying a reducing agent to the exhaust gas flowing upstream, and a swirl flow generating means provided on the upstream side of the reduction catalyst in the exhaust pipe to generate a swirl flow in the exhaust gas. Further, the swirl flow generating means has two blades obtained by dividing a substantially elliptical plate into two in the major axis direction, and these two blades are The plates are integrated in a state of rotating and intersecting with each other about the minor axis of the plate, and the major axis direction is arranged in parallel with the flow direction of the exhaust gas.

また、本発明において、前記羽根は、その外縁の円弧部が前記排気管の内壁面と接触するように構成されていることを特徴とする。   In the present invention, the blade is configured such that an arc portion of an outer edge thereof is in contact with an inner wall surface of the exhaust pipe.

また、本発明は、排気管内に設けられる旋回流発生装置であって、略楕円形状のプレートをその長軸方向に二分割してなる二枚の羽根を有し、これらの二枚の羽根が前記プレートの短軸を中心軸として相互に回転交差した状態で一体化され、前記長軸方向が前記排ガスの流れ方向と平行となるように設けられることを特徴とする。   Further, the present invention is a swirling flow generator provided in an exhaust pipe, and has two blades obtained by dividing a substantially elliptical plate into two in the major axis direction, and these two blades are The plates are integrated in a state of rotating and intersecting with each other about the minor axis of the plate, and the major axis direction is provided in parallel with the flow direction of the exhaust gas.

また、本発明において、前記羽根は、その外縁の円弧部が前記排気管の内壁面と接触するように構成されていることを特徴とする。   In the present invention, the blade is configured such that an arc portion of an outer edge thereof is in contact with an inner wall surface of the exhaust pipe.

本発明によれば、優れた旋回力を有し、抵抗の小さな旋回流発生手段を備えた内燃機関用の排ガス浄化装置を提供することができる。さらに、本発明によれば、優れた旋回力を有し、抵抗の小さな旋回流発生装置を提供することもできる。   ADVANTAGE OF THE INVENTION According to this invention, the exhaust gas purification apparatus for internal combustion engines provided with the turning flow generation | occurrence | production means with the outstanding turning force and small resistance can be provided. Furthermore, according to the present invention, it is possible to provide a swirl flow generator having excellent swirl force and low resistance.

以下、本発明を実施するための最良の形態について説明する。
図１は、本発明の実施形態に係る内燃機関用の排ガス浄化装置の主要部を示す図である。図２は、図１の各方向（Ａ〜Ｄ）から旋回流発生手段４０を見た図であり、図２の（Ａ）〜（Ｄ）は、それぞれ図１のＡ〜Ｄから旋回流発生手段４０を見た図に対応する。なお、図１及び図２において、図８と同じ箇所には同一の符号を付している。 Hereinafter, the best mode for carrying out the present invention will be described.
FIG. 1 is a diagram showing a main part of an exhaust gas purification apparatus for an internal combustion engine according to an embodiment of the present invention. 2 is a view of the swirling flow generating means 40 seen from each direction (A to D) in FIG. 1, and FIGS. 2A to 2D are swirling flows generated from A to D in FIG. 1, respectively. This corresponds to the view of the means 40. 1 and 2, the same portions as those in FIG. 8 are denoted by the same reference numerals.

図１に示すように、内燃機関用の排ガス浄化装置１００は、排気管１内に旋回流発生手段４０を備えている。また、図２に示すように、旋回流発生手段４０は、略楕円形状のプレートをその長軸方向に二分割してなる二枚の羽根４１０、４２０を有し、これらの二枚の羽根４１０、４２０が連結部４３１、４３２によって前記プレートの短軸を中心軸として相互に回転交差した状態で一体化されており、前記長軸方向が排ガスの流れ方向と平行となるように配置されている。羽根４１０、４２０は、いずれもその外縁の円弧部４１０ａ、４２０ａが排気管１の内壁面と接触するように構成されている。   As shown in FIG. 1, an exhaust gas purification apparatus 100 for an internal combustion engine includes a swirl flow generating means 40 in an exhaust pipe 1. As shown in FIG. 2, the swirling flow generating means 40 has two blades 410 and 420 obtained by dividing a substantially elliptical plate into two in the long axis direction. , 420 are integrated by connecting portions 431 and 432 in a state of rotating and intersecting with each other about the minor axis of the plate, and the major axis direction is arranged in parallel with the exhaust gas flow direction. . Each of the blades 410 and 420 is configured such that the arc portions 410 a and 420 a at the outer edges thereof are in contact with the inner wall surface of the exhaust pipe 1.

このような内燃機関用の排ガス浄化装置１００にあっては、旋回流発生手段４０を構成する二枚の羽根４１０、４２０によって、排気管１内を流れる排ガスに二重螺旋状の旋回流が生じる。そのため、内燃機関用の排ガス浄化装置１００は、優れた旋回力を有することとなる。しかも、これらの羽根４１０、４２０は、排ガスの抵抗を受けにくい構造を有し、二重螺旋状の旋回流が羽根４１０、４２０の壁面に沿ってスムースに流れることとなる。そのため、内燃機関用の排ガス浄化装置１００は、抵抗が小さくなる。   In such an exhaust gas purification apparatus 100 for an internal combustion engine, a double spiral swirling flow is generated in the exhaust gas flowing in the exhaust pipe 1 by the two blades 410 and 420 constituting the swirling flow generating means 40. . Therefore, the exhaust gas purification apparatus 100 for an internal combustion engine has an excellent turning force. Moreover, these blades 410 and 420 have a structure that is not easily subjected to the resistance of the exhaust gas, and a double spiral swirl flow smoothly flows along the wall surfaces of the blades 410 and 420. Therefore, the resistance of the exhaust gas purifying apparatus 100 for the internal combustion engine becomes small.

なお、図１において、旋回流発生手段４０は、還元剤噴霧部（図８参照）の上流側に設けられているが、本発明は、このような実施形態に限定されるものではなく、還元触媒（図８参照）の上流側であれば、旋回流発生手段４０が、還元剤噴霧部の下流側に設けられていてもよい。   In FIG. 1, the swirling flow generating means 40 is provided on the upstream side of the reducing agent spraying section (see FIG. 8), but the present invention is not limited to such an embodiment, If it is the upstream side of the catalyst (see FIG. 8), the swirling flow generating means 40 may be provided on the downstream side of the reducing agent spray section.

次に、図３〜７を参照しながら、本発明に係る旋回流発生手段と、従来技術に係る旋回流発生手段との相違点について説明する。   Next, differences between the swirling flow generating means according to the present invention and the swirling flow generating means according to the prior art will be described with reference to FIGS.

図３は、本発明に係る旋回流発生手段（同図の「発明案」参照）、及び従来技術に係る旋回流発生手段（同図の「従来構造１，２」参照）について、それぞれのフィン仕様（ア〜ウ）の旋回力及び抵抗の大小を比較した図表である。また、図４〜７は、いずれも図３に示した各フィン仕様についての流れ解析結果を示す図であり、それぞれ、図４は流線、図５は旋回力、図６は抵抗、図７は流速を示す。なお、図６には、図３の各フィン仕様（ア〜ウ）のうち、ア及びイのフィン仕様についてのみ流れ解析結果（抵抗）を図示しており、ウのフィン仕様については流れ解析結果（抵抗）を図示していない。   FIG. 3 shows the fins of the swirling flow generating means according to the present invention (see “Invention Plan” in the figure) and the swirling flow generating means according to the prior art (see “Conventional Structures 1 and 2” in the figure). It is the table | surface which compared the magnitude of the turning force and resistance of a specification (a-u). 4 to 7 are diagrams showing the flow analysis results for each fin specification shown in FIG. 3, where FIG. 4 is a streamline, FIG. 5 is a turning force, FIG. 6 is a resistance, and FIG. Indicates the flow rate. FIG. 6 shows the flow analysis result (resistance) only for the fin specifications of A and A among the fin specifications (A to C) of FIG. 3, and the flow analysis result for the fin specifications of C. (Resistance) is not shown.

まず、図３に示すように、発明案の場合には、旋回力が２．２回転と高い値を示すとともに、抵抗が３．２ｋＰａと低い値を示した。これに対し、旋回力が２．１回転と高い値を示し、発明案と同等の旋回力を有する従来構造１の場合には、抵抗が６５．１ｋＰａと著しく高い値を示した。一方、抵抗が３．２ｋＰａと低い値を示し、発明案と同等の抵抗を有する従来構造２の場合には、旋回力が０．５回転と著しく低い値を示した。また、図４〜７に示した流れ解析結果により、発明案の場合には、従来構造１、２と異なり、旋回力が大きく、抵抗が小さくなることが判明した。   First, as shown in FIG. 3, in the case of the invention, the turning force showed a high value of 2.2 rotations, and the resistance showed a low value of 3.2 kPa. On the other hand, the turning force showed a high value of 2.1 rotations, and in the case of the conventional structure 1 having a turning force equivalent to that of the inventive plan, the resistance showed a remarkably high value of 65.1 kPa. On the other hand, the resistance showed a low value of 3.2 kPa, and in the case of the conventional structure 2 having the same resistance as the invention, the turning force showed a remarkably low value of 0.5 rotation. Also, the flow analysis results shown in FIGS. 4 to 7 show that, in the case of the invention, unlike the conventional structures 1 and 2, the turning force is large and the resistance is small.

このように、本発明に係る内燃機関用の排ガス浄化装置１００(図１参照)にあっては、従来技術に係る内燃機関用の排ガス浄化装置１０（図８参照）と比べ、優れた旋回力を有し、且つ、抵抗が小さくなるという優れた効果を奏する。   As described above, the exhaust gas purifying apparatus 100 for an internal combustion engine according to the present invention (see FIG. 1) has a superior turning force as compared with the exhaust gas purifying apparatus 10 for an internal combustion engine according to the prior art (see FIG. 8). And has an excellent effect of reducing the resistance.

本発明の実施形態に係る内燃機関用の排ガス浄化装置の主要部を示す図である。It is a figure which shows the principal part of the exhaust gas purification apparatus for internal combustion engines which concerns on embodiment of this invention. 図１の各方向（Ａ〜Ｄ）から旋回流発生手段を見た図である。It is the figure which looked at the swirl | vortex flow generation means from each direction (AD) of FIG. 本発明に係る旋回流発生手段、及び従来技術に係る旋回流発生手段について、それぞれのフィン仕様（ア〜ウ）の旋回力及び抵抗の大小を比較した図表である。It is the table | surface which compared the magnitude | size of the turning force and resistance of each fin specification (a-c) about the swirling flow generation means which concerns on this invention, and the swirling flow generation means which concerns on a prior art. 各フィン仕様についての流れ解析結果（流線）を示す図である。It is a figure which shows the flow analysis result (streamline) about each fin specification. 各フィン仕様についての流れ解析結果（旋回力）を示す図である。It is a figure which shows the flow analysis result (turning force) about each fin specification. 各フィン仕様についての流れ解析結果（抵抗）を示す図である。It is a figure which shows the flow analysis result (resistance) about each fin specification. 各フィン仕様についての流れ解析結果（流速）を示す図である。It is a figure which shows the flow analysis result (flow velocity) about each fin specification. 従来技術に係る内燃機関用の排ガス浄化装置の一例を示す図である。It is a figure which shows an example of the exhaust gas purification apparatus for internal combustion engines which concerns on a prior art.

符号の説明Explanation of symbols

１ 排気管
２ 還元触媒
３ 還元剤噴射ノズル
４０ 旋回流発生手段
４１０、４２０ 羽根
４１０ａ、４２０ａ 円弧部
４３１、４３２ 連結部 DESCRIPTION OF SYMBOLS 1 Exhaust pipe 2 Reduction catalyst 3 Reducing agent injection nozzle 40 Swirling flow generation means 410, 420 Blades 410a, 420a Arc portions 431, 432 Connecting portions

Claims (4)

内燃機関から排出された排ガスが流れる排気管と、
前記排気管内に設けられ前記排ガスに含まれる窒素酸化物を還元浄化する還元触媒と、
前記還元触媒の上流側を流れる前記排ガスに還元剤を噴射供給する還元剤供給手段と、
前記排気管内のうち前記還元触媒の上流側に設けられ前記排ガスに旋回流を発生させる旋回流発生手段と、
を備えた内燃機関用の排ガス浄化装置であって、
前記旋回流発生手段は、略楕円形状のプレートをその長軸方向に二分割してなる二枚の羽根を有し、これらの二枚の羽根が前記プレートの短軸を中心軸として相互に回転交差した状態で一体化され、前記長軸方向が前記排ガスの流れ方向と平行となるように配置されていることを特徴とする内燃機関用の排ガス浄化装置。 An exhaust pipe through which exhaust gas discharged from the internal combustion engine flows;
A reduction catalyst provided in the exhaust pipe for reducing and purifying nitrogen oxides contained in the exhaust gas;
Reducing agent supply means for injecting and supplying a reducing agent to the exhaust gas flowing upstream of the reduction catalyst;
A swirl flow generating means that is provided upstream of the reduction catalyst in the exhaust pipe and generates a swirl flow in the exhaust gas;
An exhaust gas purifying device for an internal combustion engine comprising:
The swirling flow generating means has two blades obtained by dividing a substantially elliptical plate into two in the major axis direction, and these two blades rotate with each other about the short axis of the plate as a central axis. An exhaust gas purification apparatus for an internal combustion engine, which is integrated in a crossed state and arranged so that the long axis direction is parallel to the flow direction of the exhaust gas. 請求項１において、
前記羽根は、その外縁の円弧部が前記排気管の内壁面と接触するように構成されていることを特徴とする内燃機関用の排ガス浄化装置。 In claim 1,
The exhaust gas purification apparatus for an internal combustion engine, wherein the blade is configured such that an arc portion of an outer edge thereof is in contact with an inner wall surface of the exhaust pipe. 排気管内に設けられる旋回流発生装置であって、
略楕円形状のプレートをその長軸方向に二分割してなる二枚の羽根を有し、これらの二枚の羽根が前記プレートの短軸を中心軸として相互に回転交差した状態で一体化され、前記長軸方向が前記排ガスの流れ方向と平行となるように設けられることを特徴とする旋回流発生装置。 A swirl flow generator provided in an exhaust pipe,
It has two blades formed by dividing an approximately elliptical plate into two in the major axis direction, and these two blades are integrated with each other with the minor axis of the plate rotating and intersecting each other. The swirl flow generator is provided so that the major axis direction is parallel to the flow direction of the exhaust gas. 請求項３において、
前記羽根は、その外縁の円弧部が前記排気管の内壁面と接触するように構成されていることを特徴とする旋回流発生装置。 In claim 3,
The swirl flow generator is configured such that the arc portion of the outer edge of the blade is in contact with the inner wall surface of the exhaust pipe.
JP2008241382A 2008-09-19 2008-09-19 Exhaust gas purifying device for internal combustion engine, and swirl flow generating device Pending JP2010071240A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2008241382A JP2010071240A (en) 2008-09-19 2008-09-19 Exhaust gas purifying device for internal combustion engine, and swirl flow generating device
US13/063,039 US20110185710A1 (en) 2008-09-19 2009-08-31 Exhaust gas purifying device for internal combustion engine, and swirl generating device
EP09814449A EP2325451A4 (en) 2008-09-19 2009-08-31 Exhaust gas purifying device for internal combustion engine, and swirl generating device
CN2009801339829A CN102137991A (en) 2008-09-19 2009-08-31 Exhaust gas purifying device for internal combustion engine, and swirl generating device
PCT/JP2009/065168 WO2010032604A1 (en) 2008-09-19 2009-08-31 Exhaust gas purifying device for internal combustion engine, and swirl generating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008241382A JP2010071240A (en) 2008-09-19 2008-09-19 Exhaust gas purifying device for internal combustion engine, and swirl flow generating device

Publications (1)

Publication Number Publication Date
JP2010071240A true JP2010071240A (en) 2010-04-02

Family

ID=42039438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008241382A Pending JP2010071240A (en) 2008-09-19 2008-09-19 Exhaust gas purifying device for internal combustion engine, and swirl flow generating device

Country Status (5)

Country Link
US (1) US20110185710A1 (en)
EP (1) EP2325451A4 (en)
JP (1) JP2010071240A (en)
CN (1) CN102137991A (en)
WO (1) WO2010032604A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014205782B4 (en) * 2013-06-05 2017-04-13 Honda Motor Co . , Ltd. Exhaust gas purification device for internal combustion engines
JP2018062885A (en) * 2016-10-12 2018-04-19 東京濾器株式会社 Swirl flow generation device
WO2021095305A1 (en) * 2019-11-12 2021-05-20 日立造船株式会社 Flow rectifier, hydrolysis apparatus, and denitrification equipment

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20110533A1 (en) * 2011-09-16 2013-03-17 Magneti Marelli Spa DISCHARGE SYSTEM OF AN INTERNAL COMBUSTION ENGINE PROVIDED WITH AN ADDITIVE INJECTION DEVICE
CN102927443B (en) * 2012-11-12 2014-03-05 常州大学 Circular cone type spiral flow generator
CN105642145B (en) * 2016-01-06 2018-12-28 广州市八通混合器有限公司 A kind of large size static mixer
US11624305B2 (en) * 2020-03-02 2023-04-11 Cummins Emission Solutions Inc. Vortex generators and virtual mixers for aftertreatment systems
JP2022102298A (en) * 2020-12-25 2022-07-07 株式会社クボタ Exhaust gas diffusion device
CN112973485B (en) * 2021-03-18 2021-12-07 同济大学 Quick tubular static mixer
WO2023228495A1 (en) * 2022-05-26 2023-11-30 三菱重工業株式会社 Denitration device
CN115217591B (en) * 2022-07-27 2023-07-04 无锡威孚力达催化净化器有限责任公司 Urea mixing device capable of being crushed for multiple times and controllable in rotational flow

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204305A (en) * 1981-06-10 1982-12-15 Toshiba Corp Water flow swirling valve
JP2004267868A (en) * 2003-03-06 2004-09-30 Kosuke Chiba System for dissolving/storing/supplying gas with line atomizer
JP2008144644A (en) * 2006-12-08 2008-06-26 Mitsubishi Fuso Truck & Bus Corp Exhaust emission control device for internal combustion engine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643927A (en) * 1970-10-15 1972-02-22 Phillips Petroleum Co Stationary mixture and method for mixing material
US3751009A (en) * 1972-03-02 1973-08-07 Mc Hugh J Motionless mixing device
JPS5195070U (en) * 1975-01-29 1976-07-30
JPS54105972U (en) * 1978-01-11 1979-07-26
JPS62269733A (en) * 1986-05-15 1987-11-24 Sanko Seisakusho:Kk Mixing element and mixer containing said element
JP3892452B2 (en) * 2004-07-16 2007-03-14 日産ディーゼル工業株式会社 Engine exhaust purification system
US8141353B2 (en) * 2008-04-25 2012-03-27 Tenneco Automotive Operating Company Inc. Exhaust gas additive/treatment system and mixer for use therein

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204305A (en) * 1981-06-10 1982-12-15 Toshiba Corp Water flow swirling valve
JP2004267868A (en) * 2003-03-06 2004-09-30 Kosuke Chiba System for dissolving/storing/supplying gas with line atomizer
JP2008144644A (en) * 2006-12-08 2008-06-26 Mitsubishi Fuso Truck & Bus Corp Exhaust emission control device for internal combustion engine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014205782B4 (en) * 2013-06-05 2017-04-13 Honda Motor Co . , Ltd. Exhaust gas purification device for internal combustion engines
JP2018062885A (en) * 2016-10-12 2018-04-19 東京濾器株式会社 Swirl flow generation device
WO2021095305A1 (en) * 2019-11-12 2021-05-20 日立造船株式会社 Flow rectifier, hydrolysis apparatus, and denitrification equipment
CN114729586A (en) * 2019-11-12 2022-07-08 日立造船株式会社 Rectifying device, hydrolysis device, and denitration device
JP7382595B2 (en) 2019-11-12 2023-11-17 日立造船株式会社 Rectifier, hydrolysis equipment, and denitrification equipment
CN114729586B (en) * 2019-11-12 2023-11-21 日立造船株式会社 Rectifying device, hydrolysis device and denitration device

Also Published As

Publication number Publication date
EP2325451A4 (en) 2013-02-20
EP2325451A1 (en) 2011-05-25
WO2010032604A1 (en) 2010-03-25
US20110185710A1 (en) 2011-08-04
CN102137991A (en) 2011-07-27

Similar Documents

Publication Publication Date Title
JP2010071240A (en) Exhaust gas purifying device for internal combustion engine, and swirl flow generating device
JP5714844B2 (en) Exhaust gas purification device
JP4884332B2 (en) Exhaust system for internal combustion engine
JP6073659B2 (en) Exhaust gas purification device
JP5977375B2 (en) Exhaust gas purification device
JP4930796B2 (en) Exhaust gas purification device and exhaust pipe for diesel engine
US20160332126A1 (en) Mixing assembly for reducing exhaust reductant deposits
JP5655046B2 (en) Mixing / vaporizing device
JP6560093B2 (en) Ship exhaust gas purification system
JP2011111927A (en) Exhaust emission control device of internal combustion engine
JP6419672B2 (en) Ship exhaust gas purification system
JP2014530979A (en) Compressed air and liquid reducing agent mixing device
JP2010144569A (en) Selective reduction catalyst device
JP6306306B2 (en) Diffusion plate and manufacturing method thereof
JP5500909B2 (en) Exhaust purification device
JP2014190177A (en) Exhaust cleaning device for internal combustion engine
JP2010203248A (en) Exhaust pipe structure of internal combustion engine
CN109184863A (en) A kind of SCR hybrid system and its SCR mixer
JP2011106360A (en) Urea reduction type scr device for internal combustion engine
JP2011106412A (en) Exhaust emission control device for internal combustion engine
JP6846155B2 (en) Swirling flow generator
JP5760799B2 (en) Exhaust gas purification device for internal combustion engine
JP6740883B2 (en) Selective reduction catalyst system
WO2020145101A1 (en) Mixing member, exhaust purifying device, and vehicle
JP2023167157A (en) Exhaust emission control device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20110819

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130108

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20130507