JP5075677B2

JP5075677B2 - Exhaust gas purification device

Info

Publication number: JP5075677B2
Application number: JP2008047952A
Authority: JP
Inventors: 寛松岡; 嘉博内山
Original assignee: 寛松岡
Priority date: 2008-02-28
Filing date: 2008-02-28
Publication date: 2012-11-21
Anticipated expiration: 2028-02-28
Also published as: JP2009203921A

Description

この発明は，エンジン，バーナ，ガス発生源等からの排気ガスを排気ガス通路に配設したフィルタに通し，排気ガスに含まれる粒子状物質，スート，ＨＣ，ＮＯ_X等の有害物質を触媒等の助けで燃焼させ又は酸化・還元反応て消失させ，排気ガスを浄化する排気ガス浄化装置に関する。 In this invention, exhaust gas from an engine, burner, gas generation source, etc. is passed through a filter disposed in an exhaust gas passage, and particulate matter, soot, HC, NO _{X and the} like contained in the exhaust gas are used as a catalyst, etc. The present invention relates to an exhaust gas purifying device that purifies exhaust gas by burning with the help of an oxidation or disappearing by an oxidation / reduction reaction.

従来，ディーゼルエンジンは，その熱効率が高いことからトラック，船等に多く用いられており，近年，ＣＯ₂の排出量の最も少ない原動機として見直され，乗用車にも採用が増え続けている。最近では，ディーゼルパティキュレートフィルタ（以下，ＤＰＦという）は多くの車両に搭載され，ＤＰＦのコージライトや炭化珪素のセラミックハニカムに粒子状物質（以下，ＰＭという）を捕集して触媒の助けで低温燃焼させて焼却し，排気ガスを浄化するようになった。また，排気ガス中に含まれるＰＭについて，その組成のほとんどが未燃焼のカーボン又は重質油の炭化水素であるので，ＤＰＦを用いて未燃焼の燃料を完全に燃焼させさえすれば，微粒子として排出されることがない。通常，フィルタに担持された触媒は，３００℃前後から煤を燃焼させるか，又は排気ガス中のＮＯをＮＯ₂に酸化させ_,そのＮＯ₂を活用するものであり，３００℃以下でＰＭを燃焼させる技術等が最も低温で煤を燃焼させるものであると言われている。 Conventionally, diesel engines have been widely used for trucks, ships, etc. due to their high thermal efficiency. In recent years, diesel engines have been reconsidered as the prime mover with the least CO ₂ emissions, and their use is increasing for passenger cars. Recently, diesel particulate full I filter (hereinafter, referred to as DPF) is mounted on many vehicles, particulate matter (hereinafter, referred to as PM) in the ceramic honeycomb of cordierite or silicon carbide DPF catalyst by collecting the With the help of low temperature combustion, it was incinerated and the exhaust gas was purified. Moreover, since most of the composition of PM contained in exhaust gas is unburned carbon or hydrocarbon of heavy oil, fine particles can be obtained as long as unburned fuel is completely burned using DPF. It will not be discharged. Usually, the catalyst supported on the filter, or to burn the soot from around 300 ° C., or NO in the exhaust gas is oxidized to NO _{_2,} it is intended to take advantage of the NO _2, combusting PM at 300 ° C. or less It is said that the technology used to burn soot at the lowest temperature.

一方，都市部の大気をクリーンにするためには，新車は勿論であるが，既に市販された自動車の排気ガスを浄化することが不可欠となり，そのような観点からＤＰＦを自動車に搭載することが積極的に進められている。しかしながら，現在使用されている既存車で，ＤＰＦを導入する場合，コモンレール等の排気温度を容易に制御できる装置を適用することができないこと，また，最新の新車にＤＰＦを用いる場合に，エンジン駆動と関連して総合的に制御できないためＤＰＦが正常に作動しない場合が多い。排気ガス浄化の用途に用いることのできるフィルタとして，近年，金属製薄板と金属製不織布を複合させたものが使われ始めている。該フィルタは，金属製薄板のガイドで排気ガスを金属不織布に衝突させてＰＭを捕集しており，フィルタの構造が複雑であり，製造費用が高いこと，ＰＭ低減率が４０〜５０％が限度であってそれ以上高くできない難点があった。 Meanwhile, in order to the urban air chestnut over emissions is new is of course, already become essential to purify the commercially available automotive exhaust gas, equipped with DPF from that perspective the automobile Is being actively promoted. However, when DPF is introduced in an existing vehicle currently in use, it is not possible to apply a device that can easily control the exhaust temperature such as a common rail, and when the DPF is used in the latest new vehicle, the engine drive In many cases, the DPF does not operate normally because it cannot be comprehensively controlled. As a filter that can be used for exhaust gas purification, a composite of a metal thin plate and a metal nonwoven fabric has recently been used. The filter collects PM by colliding exhaust gas with a metal nonwoven fabric with a metal thin plate guide, the filter structure is complicated, the manufacturing cost is high, and the PM reduction rate is 40-50%. There was a limit that could not be raised any more.

また，従来の排気ガス浄化装置は，ディーゼルエンジンから排出される排気ガスに含まれる煤状粒子の排出物を低減又は除去するものであり，ＮＯをＮＯ₂に酸化するのに有効な第１触媒，及び炭化水素，一酸化炭素，揮発性有機物成分を酸化させるのに有効な第２触媒を有し，各々の触媒がハニカム型の流通モノリス上に担持され，第２触媒モノリスの上又は中に捕獲された煤状粒子が第１触媒からのＮＯ₂含有ガスの中で燃焼され，第１触媒の担体として使用されるモノリスは煤状粒子の捕集を最小限度に抑えるものである（例えば，特許文献１参照）。 Further, the conventional exhaust gas purifying device reduces or removes the soot-like particles contained in the exhaust gas discharged from the diesel engine, and is a first catalyst effective for oxidizing NO into NO _2. And a second catalyst effective to oxidize hydrocarbons, carbon monoxide and volatile organic components, each catalyst supported on a honeycomb-type flow monolith, on or in the second catalyst monolith The captured soot-like particles are combusted in the NO ₂ -containing gas from the first catalyst, and the monolith used as the support for the first catalyst minimizes trapping of soot-like particles (for example, Patent Document 1).

また，ディーゼルエンジンの排ガスを浄化する排ガスフィルタとして，１つの帯状フィルタ層から成るものが知られており，該排ガスフィルタは，少なくとも部分的に流体が貫流できる材料から成る少なくとも１つのフィルタ部を備えた帯状フィルタ層と金属箔とからなり，フィルタ層が排ガスの気体成分を転換するための触媒活性被覆を備えた少なくとも１つの接触部と排ガスから粒子を濾過除去するためのフィルタ部とを備えている（例えば，特許文献２参照）。 Further, as an exhaust gas filter for purifying exhaust gas from a diesel engine, an exhaust gas filter comprising one band filter layer is known, and the exhaust gas filter includes at least one filter part made of a material through which a fluid can flow at least partially. The filter layer comprises at least one contact portion provided with a catalytically active coating for converting the gaseous component of the exhaust gas, and a filter portion for filtering and removing particles from the exhaust gas. (For example, refer to Patent Document 2).

また，加熱要素付きの排気ガス浄化装置としては，外被管内に配置されて排気ガスで貫流されるハニカム構造の触媒担体と電気加熱要素とを有し，加熱要素が両端に電気接続端子を有し，加熱要素内に電気絶縁用の隙間によって曲がりくねった流路が規定されており，加熱要素がハニカム体であり，ハニカム体が電気絶縁支持要素により触媒単体に固定され，ハニカム体が排気ガスの流れ方向において触媒担体の下流に配置されている（例えば，特許文献３参照）。
特開平１０―１５９５５２号公報特表２００５−５３４４８７号公報特表２００３−５０９６２０号公報 In addition, an exhaust gas purification apparatus with a heating element has a honeycomb-structured catalyst carrier and an electric heating element that are arranged in a jacket pipe and flows through the exhaust gas, and the heating element has electric connection terminals at both ends. However, a tortuous flow path is defined in the heating element by a gap for electrical insulation, the heating element is a honeycomb body, the honeycomb body is fixed to the catalyst alone by the electrical insulation support element, and the honeycomb body is exhaust gas. It arrange | positions downstream of the catalyst support | carrier in the flow direction (for example, refer patent document 3).
Japanese Patent Laid-Open No. 10-159552 JP 2005-534487 A Special table 2003-509620 gazette

ところで，ディーゼルエンジンは，圧縮着火エンジンであるため，ＮＯ_Xや粒子状物質（ＰＭ）が排気ガスに含まれている。ディーゼルエンジンでは，ＮＯ_XとＰＭとの浄化はトレードオフ関係にあり，両者の低減は難しく，また，ディーゼルエンジンは，排気ガス中の酸素濃度が高いため，ガソリンエンジンで有効な三元触媒によるＮＯ_Xの低減が難しい。更に，ＰＭの主成分である煤は，酸化温度が高いため特殊な低減装置が必要になる。また，ＮＯをＮＯ₂に酸化させることを活用する排ガス浄化装置は，ＮＯ_Xの排出量の絶対値が減少してきている状況においては，生成するＮＯ₂量が減少することになり，その効果も制限されてきた。また，ＤＰＦとしては，コージライトセラミックス，炭化珪素セラミックスのハニカムを用いてＰＭを濾過し，フィルタに堆積したＰＭをフィルタに担持した触媒により低温で燃焼させるものが有効であり，多くの車両に搭載されるようになった。ＤＰＦには，コージライト製ハニカム，金属製ハニカム等にアルミナ等をコーティングし，酸化触媒を担持したり，ＮＯ_X還元触媒を担持して用いている。勿論，担体は，表面積が大きい方が排気ガスとの接触が多くなり高い性能が得られる。従来のコージライトが安価であるので，多く用いられているが，最近では，２０〜３０ミクロンのステンレススチールを波板状に折り曲げ，平板と交互に重ねて巻き上げた金属ハニカムが，板圧がコージライトに比較して薄いので，圧力損失が小さいということで用いられるようになった。更に，金属ハニカムには，その表面に段付きとして乱流を起こし，排気ガスとの接触機会を増やし，性能向上を図るものが知られている。金属ハニカムは，平板と波板とを交互に重ねて巻き上げるが，金属製薄板を素材として用いているため，絞りの入るような複雑な折り曲げは成形が困難であり，排気ガスに乱れを起こす場合でも，一部を切欠き邪魔板の役割をさせる程度であり，乱れを起こすのも限度がある。 By the way, since the diesel engine is a compression ignition engine, NO _x and particulate matter (PM) are contained in the exhaust gas. In diesel engines, NO _x and PM purification are in a trade-off relationship, and it is difficult to reduce them. In addition, diesel engines have a high oxygen concentration in the exhaust gas, so NO with a three-way catalyst that is effective in gasoline engines. _X is difficult to reduce. Further, soot, which is the main component of PM, requires a special reduction device because of its high oxidation temperature. In addition, an exhaust gas purifying apparatus that utilizes the oxidation of NO to NO ₂ reduces the amount of NO ₂ produced in a situation where the absolute value of NO _x emission is decreasing, and the effect thereof Has been limited. In addition, DPF is effective in filtering PM using honeycomb of cordierite ceramics and silicon carbide ceramics, and burning PM deposited on the filter at a low temperature with a catalyst supported on the filter. It came to be. The DPF is used by coating an alumina or the like on a cordierite honeycomb, a metal honeycomb, etc., and supporting an oxidation catalyst or a NO _x reduction catalyst. Of course, the carrier has a larger surface area and more contact with the exhaust gas, so that higher performance can be obtained. Conventional cordierite is widely used because it is inexpensive, but recently, a metal honeycomb made of 20-30 micron stainless steel bent into corrugated plates and rolled up alternately with flat plates has a plate pressure of cord. Since it is thinner than the light, it has come to be used because of its low pressure loss. Further, it is known that metal honeycombs have a stepped surface and cause turbulent flow to increase contact with exhaust gas and improve performance. Metal honeycombs are rolled up by alternately stacking flat plates and corrugated plates, but because they are made of thin metal plates, it is difficult to form complex bends that can cause a restriction, which can cause turbulence in the exhaust gas. However, it is only enough to cut out a part of it and make it act as a baffle, and there is a limit to causing disturbance.

また，担体に担持させる触媒として，軽油，尿素等を還元剤とするＮＯ_X選択還元触媒は，ＮＯ_X還元触媒の上流で軽油，尿素水を霧状に噴射し，排気ガスと混合し，ＮＯ_X還元触媒にてＮＯ_Xを還元浄化するが，自動車に搭載する場合に，スペースが狭く，その結果，還元剤と排気ガスを完全に混合させることが極めて難しく，還元剤の分布が不均一になり，理論上のＮＯ_X還元率より低下してしまうという問題がある。従来の排気ガス浄化装置では，ＰＭの主成分である煤は，フィルタにより濾過されて燃焼するが，ＤＰＦを搭載した車両が渋滞路等で連続的に走行する場合に，エンジンの排気ガス温度は触媒によるＰＭの燃焼温度に達する頻度が極めて少なくなり，結果的に煤によりフィルタが閉塞し，それが排気管の閉塞となって車両が走行できなくなる可能性がある。更に，フィルタに堆積した煤が車両の走行状態により煤の燃焼温度を上回った時に，ＰＭが急激に爆発的に燃焼し，ＤＰＦを破損したり，フィルタを溶損させたり，火災に発展する恐れがある。 In addition, as a catalyst to be supported on the carrier, a NO _x selective reduction catalyst using light oil, urea, or the like as a reducing agent is injected upstream of the NO _x reduction catalyst in the form of a mist of light oil and urea water, mixed with exhaust gas, and NOx. NO _X is reduced and purified by an _X reduction catalyst, but when installed in an automobile, the space is narrow, and as a result, it is extremely difficult to completely mix the reducing agent and exhaust gas, and the distribution of the reducing agent is uneven. Therefore, there is a problem that it falls below the theoretical NO _x reduction rate. In conventional exhaust gas purification devices, soot, which is the main component of PM, is filtered by a filter and burned. However, when a vehicle equipped with a DPF runs continuously on a congested road, the exhaust gas temperature of the engine is The frequency of reaching the PM combustion temperature by the catalyst is extremely low, and as a result, the filter is blocked by soot, which may block the exhaust pipe and prevent the vehicle from traveling. Furthermore, when the soot accumulated on the filter exceeds the combustion temperature of the soot due to the running state of the vehicle, the PM may suddenly burn explosively, damaging the DPF, damaging the filter, or developing into a fire. There is.

この発明の目的は，上記の問題を解決するため，排気ガス通路に異なる触媒を担持させた２個の担体を直列に配設し，高温から低温までの排気ガスに含まれるＮＯ_Xを還元消失させ，また，担体に形成されるハニカム通路そのものを従来の構造と根本的に改良し，排気ガスがコージライトの壁面を横切って通過する又はコージライト，金属薄板で形成されたハニカム状通路に平行に流れるのではなく，金網を波板状帯体に成形した溝に沿って延びる屈折路又は平行路で形成されたハニカム通路に排気ガスを流し，排気ガスをハニカム通路の壁面に沿って接触させつつ通過させ，それによって排気ガス中のＰＭ等の有害物質でフィルタの目詰まりや閉塞する現象を避け，ＰＭがハニカム通路の壁面に衝突しつつ接触して壁面に捕集され，エンジン排気温度が上昇した時のエンジン排気熱でＰＭを加熱焼却又は触媒の助けで酸化・還元して消失させ，又はＰＭを屈折路に滞留又は捕集した位置でエンジン排気熱で燃焼又は触媒の助けで酸化還元消失させ，排気ガス中のＰＭの高い削減率を確保する排気ガス浄化装置を提供することである。 The object of the present invention is to solve the above problem by arranging two carriers carrying different catalysts in the exhaust gas passage in series, and reducing and eliminating NO _x contained in the exhaust gas from high temperature to low temperature. Moreover, the honeycomb passage itself formed in the carrier is fundamentally improved from the conventional structure, and the exhaust gas passes across the wall surface of cordierite or is parallel to the honeycomb passage formed of cordierite or a thin metal plate. The exhaust gas is caused to flow through a honeycomb passage formed by a refraction path or a parallel path extending along a groove formed by forming a wire mesh into a corrugated strip, and the exhaust gas is brought into contact with the wall surface of the honeycomb passage. This prevents the clogging and clogging of the filter with harmful substances such as PM in the exhaust gas, so that PM collides with the wall surface of the honeycomb passage and is collected on the wall surface. When the exhaust temperature rises, the engine exhaust heat causes PM to be burned by heating or burning or oxidized / reduced with the aid of a catalyst, or burned with engine exhaust heat at the position where the PM stayed or collected in the refractive path or aided by the catalyst It is to provide an exhaust gas purification device that eliminates redox and secures a high reduction rate of PM in exhaust gas.

この発明は，排気ガス通路を形成するケース内に配設された担体を備えたフィルタに排気ガスを通して前記排気ガス中の粒子状物質，スート，ＮＯ_X，ＨＣ等の有害物質を燃焼や酸化・還元によって消失させて前記排気ガスを浄化する排気ガス浄化装置において，
前記担体は前記ケース内の排気ガス流れ方向に少なくとも２個直列に配設され，
前記担体の上流には還元剤を前記排気ガス通路に供給する還元剤供給手段が設けられ，前記担体は金網を少なくとも波板状に折り曲げて成形した波板状帯体を筒状に巻き上げて形成された柱状体から構成され，
上流側の前記柱状体を構成する前記担体にはＮＯ _X 還元触媒が担持され且つ下流側の前記柱状体を構成する前記担体には酸化触媒又はＮＯ _X 還元触媒が担持されており，
少なくとも前記下流側の前記柱状体には，前記金網を波板状に折り曲げて軸方向に対してジグザグな傾き状に延びる多数の稜線と前記稜線間の溝とから構成される屈折路に成形された２枚の前記波板状帯体が，前記稜線の傾き方向を互いに交差状に重ね合わせて巻き上げられて前記溝に沿って多数のジグザグガス通路でなる前記ハニカム通路が形成されていることを特徴とする排気ガス浄化装置に関する。 In the present invention, harmful substances such as particulate matter, soot, NO _x , and HC in the exhaust gas are passed through a filter provided with a carrier disposed in a case forming an exhaust gas passage to exhaust, oxidize, oxidize, and so on. In an exhaust gas purification device that purifies the exhaust gas by disappearing by reduction,
At least two carriers are arranged in series in the exhaust gas flow direction in the case,
A reducing agent supplying means for supplying a reducing agent to the exhaust gas passage is provided upstream of the carrier, and the carrier is formed by winding up a corrugated belt body formed by bending a metal mesh into at least a corrugated plate shape. Made up of columnar bodies,
The support constituting the upstream columnar body carries a NO _x reduction catalyst, and the support constituting the downstream columnar body carries an oxidation catalyst or a NO _x reduction catalyst,
At least the columnar body on the downstream side is formed into a refraction path composed of a plurality of ridge lines extending in a zigzag inclination with respect to the axial direction by bending the wire mesh into a corrugated plate shape and grooves between the ridge lines. The two corrugated strips are rolled up with the ridge lines inclined in an intersecting manner so as to form the honeycomb passage including a plurality of zigzag gas passages along the groove. The present invention relates to a featured exhaust gas purification device.

また，この排気ガス浄化装置は，前記フィルタにおける上流側の前記柱状体を構成する前記担体に担持された前記触媒として少なくとも銀を用い，下流側の前記柱状体を構成する前記担体に担持された前記触媒として少なくとも白金を用いている。 Further , the exhaust gas purifying apparatus uses at least silver as the catalyst carried on the carrier constituting the columnar body on the upstream side in the filter, and is carried on the carrier constituting the columnar body on the downstream side. At least platinum is used as the catalyst.

この排気ガス浄化装置は，前記フィルタにおける下流側の前記柱状体を構成する前記担体は，前記稜線が前記柱状体の軸方向に傾き状に延びて前記排気ガス中の前記粒子状物質を捕集して焼却するものである。 In the exhaust gas purifying apparatus, the carrier constituting the columnar body on the downstream side of the filter collects the particulate matter in the exhaust gas with the ridge line extending in an inclined direction in the axial direction of the columnar body. And then incinerate.

この排気ガス浄化装置は，上記のように構成されているので，排気ガスのハニカム通路と粒子状物質（以下，ＰＭという）等の捕集部分とが区割され，担体がＰＭ等で閉塞することがなく，ＰＭ捕集率として４０％〜８０％程度を常に確保することができ，また，ハニカム通路が屈折して金網自身がガス流に乱れを起こすため酸化・還元性能が良好に行われ，スート，ＨＣ，ＮＯ_X等の有害物質を触媒の助けで酸化・還元によって消失させることができる。ハニカム通路は金網であるので，排気ガスが隣り合うセルを若干通過し合うので，ＨＣ系の還元触媒が流入側で分布に濃淡があっても担体を通過するに従って混合が良好に行われ，濃淡が解消され，一層反応が促進されて浄化される。また，この排気ガス浄化装置は，上流側の担体には，金網に銀を主体とするＮＯ_X触媒を担持することによって，４００℃をピークにしたＮＯ_Xを浄化でき，更に，下流側の担体には，金網に屈曲路を持つハニカム通路に形成してＰＭ捕集機能を持つフィルタに構成するため，金網のメッシュ数を増やしたり，複数枚の金網を用いるものに構成できる。下流側の担体には，金網に白金を主体とした触媒を担持させることによって，捕集したＰＭの燃焼を促進させることができる。また，フィルタを構成する下流側の担体が白金系のＮＯ_X還元触媒が担持されているので，ＰＭの燃焼も促進できると共にＮＯ_Xの還元も可能になる。特に，白金系のＮＯ_X還元触媒は，２００℃程度で還元率がピークであるため，上流側の担体に担持させた４００℃ピークの銀系のＮＯ_X還元触媒と組み合わせることで，２００℃から５００℃の範囲の高い範囲でＮＯ_X還元性能を発揮させることができる。下流側の担体は，ＰＭ浄化も可能であるため，ＮＯ_XとＰＭとの浄化を極めてコンパクトな触媒構成で達成できる。また，この排気ガス浄化装置は，従来の尿素を還元剤に用いるものではなく，システム構成がシンプルな炭化水素系還元剤を用いて低温から高温までのＮＯ_X還元が可能になり，ＰＭの捕集焼却が可能になり，担体を少なくとも２種類だけの触媒でシンプルにコンパクトに構成できる。 Since this exhaust gas purification device is configured as described above, the honeycomb passage of exhaust gas and the trapping part of particulate matter (hereinafter referred to as PM) are divided, and the carrier is blocked with PM or the like. Therefore, the PM collection rate can always be kept in the range of 40% to 80%, and the honeycomb passage is refracted and the wire mesh itself disturbs the gas flow, so that the oxidation / reduction performance is good. , Soot, HC, NO _x, etc. can be eliminated by oxidation / reduction with the aid of a catalyst. Since the honeycomb passage is a wire mesh, the exhaust gas slightly passes through the adjacent cells. Therefore, even if the distribution of the HC reduction catalyst is dark on the inflow side, the mixing is performed well as it passes through the carrier. Is eliminated and the reaction is further promoted and purified. Further, the exhaust gas purifying apparatus, the carrier of the upstream side, by carrying the NO _X catalyst composed mainly of silver wire mesh, can purify NO _X was a peak of 400 ° C., further, the downstream carrier In order to form a filter having a PM trapping function by forming a honeycomb passage having a bent path in a wire mesh, it is possible to increase the number of meshes of the wire mesh or to use a plurality of wire meshes. By supporting a catalyst mainly composed of platinum on a wire mesh on the downstream carrier, combustion of the collected PM can be promoted. Further, since the downstream carrier constituting the filter carries the platinum-based NO _x reduction catalyst, PM combustion can be promoted and NO _x can be reduced. In particular, a platinum-based NO _x reduction catalyst has a peak reduction rate at about 200 ° C. , and therefore, when combined with a 400 ° C. peak silver-based NO _x reduction catalyst supported on an upstream support, the platinum-based NO _x reduction catalyst can be used from 200 ° C. The NO _x reduction performance can be exhibited in a high range of 500 ° C. Since the downstream carrier can also perform PM purification, NO _x and PM purification can be achieved with an extremely compact catalyst configuration. In addition, this exhaust gas purification device does not use conventional urea as a reducing agent, but can reduce NO _x from low to high temperatures using a hydrocarbon-based reducing agent with a simple system configuration, and captures PM. Collection and incineration are possible, and the carrier can be configured simply and compactly with at least two types of catalysts.

この排気ガス浄化装置は，少なくとも波板状帯体が巻き上げられた柱状体に，溝によって形成したハニカム通路がジグザク状の屈折路や平行路に形成され，通路壁面が金網又は同等の金属製不織布によって凹凸状になっているので，排気ガスを凹凸壁に接触させて衝突させながら流し，排気ガス流れに細かい乱れを発生させ，排気ガスと壁面表面との接触が増大し，ＰＭ等の有害物質の捕集が有効になり，ＰＭを捕捉してもハニカム通路は閉塞することなく，排気ガスを通過させることができる。帯体の金網のメッシュの仕様（線径，メッシュ数，枚数）を変更したり，波板状帯体に形成されるハニカム通路の断面形状，ジグザグ状の形状を変えることにより，ＰＭの補修率を調整することができる。即ち，フィルタは，排気ガス中のＰＭ等の有害物質が屈折路又は平行路の通路壁面に接触しつつ流れて加熱燃焼又は酸化・還元され，たとえ有害物質のうちＰＭが直ちに加熱燃焼や酸化燃焼せずにＰＭが壁面に滞留して捕集された状態であっても，通路壁面であってフィルタのハニカム通路そのものが閉塞することがなく，捕集されたＰＭが時間経過に従って加熱燃焼や酸化燃焼して消失し，ＰＭの排気ガスからの除去率を４０〜８０％達成でき，排気ガスは常に長時間にわたってスムーズに通路を流れ，エンジン等の運転状態に悪影響を及ぼすことがない。この排気ガス浄化装置は，フィルタに屈折路や平行路が形成されて，ハニカム通路とＰＭの捕集部分とが別々であるため，ハニカム通路が閉塞することがなく，捕集されたＰＭは時間経過と共に触媒の助けで徐々に酸化燃焼消失，又はエンジン排気温度が高くなって排気熱により加熱燃焼又はＮＯ₂により酸化消失することになり，排気ガス中のＰＭの捕集効率を向上させることができる。また，フィルタは，帯体を一対の凹凸成形具を通したり又は押圧成形のみで，簡単に稜線と該稜線間の溝とを成形することができ，波板状帯体の製造が容易であって安価であり，帯体は互いに絡み合っているので，必ずしも帯体同士を接合する必要がなくなる。しかも，この排気ガス浄化装置は，従来のようなステンレススチール製の薄板の代わりに，金網又は金属製不織布の帯体を用いてフィルタを形成するので，成形が容易であり，成形の自由度が大幅に改善される。例えば，フィルタを構成する従来の２０〜３０μｍの薄板では伸び等はほとんど期待できないが，金網又は金属製不織布では自由度が高くなり，成形を簡単で安価に行うことができる。 In this exhaust gas purifying device, a honeycomb passage formed by a groove is formed in a zigzag refraction path or a parallel path at least on a columnar body on which a corrugated strip is wound, and the wall surface of the passage is a metal mesh or an equivalent metal nonwoven fabric. Because of the uneven surface, the exhaust gas is made to contact the uneven wall and flow while colliding with it, causing fine turbulence in the exhaust gas flow, increasing the contact between the exhaust gas and the wall surface, and harmful substances such as PM Therefore, even if PM is captured, the honeycomb passage is not blocked and the exhaust gas can be passed. PM repair rate by changing the mesh specifications (wire diameter, number of meshes, number of sheets) of the band metal mesh or changing the cross-sectional shape and zigzag shape of the honeycomb passage formed in the corrugated belt Can be adjusted. That is, in the filter, harmful substances such as PM in the exhaust gas flow while contacting the wall surface of the refraction path or parallel path and are heated, burned or oxidized / reduced. Even if the PM stays on the wall surface and is collected, the honeycomb wall of the filter itself is not clogged, and the collected PM is heated and burned and oxidized over time. It burns and disappears, and the removal rate of PM from exhaust gas can be achieved 40 to 80%. Exhaust gas always flows smoothly over a long period of time and does not adversely affect the operating state of the engine or the like. In this exhaust gas purifying device, since a refraction path and a parallel path are formed in the filter, and the honeycomb passage and the PM collection portion are separate, the honeycomb passage is not clogged, and the collected PM is time-consuming. With the help of the catalyst, the oxidation combustion disappears gradually with the help of the catalyst, or the exhaust temperature of the engine becomes high, and the exhaust heat causes the combustion by heating or the oxidation disappearance by NO _2, which can improve the collection efficiency of PM in the exhaust gas. it can. In addition, the filter can easily form the ridge line and the groove between the ridge lines by simply passing the band through a pair of concavo-convex forming tools or by press molding, making it easy to manufacture the corrugated sheet band. It is inexpensive and the strips are intertwined with each other, so it is not always necessary to join the strips together. In addition, this exhaust gas purifying device forms a filter using a band of a metal mesh or a metal non-woven fabric instead of a conventional stainless steel thin plate, so that it is easy to form and has a high degree of freedom in forming. Greatly improved. For example, the conventional 20-30 μm thin plate constituting the filter can hardly be expected to elongate, but a metal mesh or a metal non-woven fabric has a high degree of freedom and can be molded easily and inexpensively.

この発明による排気ガス浄化装置は，エンジン，バーナ，燃焼装置等から排気される排気ガスに含まれる粒子状物質（以下，ＰＭ），スート，ＨＣ，ＮＯ_X等の有害物質を燃焼，酸化還元反応させて消失除去して浄化するのに適したものである。この排気ガス浄化装置は，例えば，排気ガスに含まれるＰＭを酸化反応させ，又はエンジン排気温度が高温になった時にエンジン排気熱で加熱燃焼させて排気ガスを浄化するのに適している。 The exhaust gas purifying apparatus according to the present invention combusts, oxidation-reduction reaction of harmful substances such as particulate matter (hereinafter referred to as PM), soot, HC, NO _x contained in exhaust gas exhausted from an engine, burner, combustion device, etc. It is suitable for disappearance removal and purification. This exhaust gas purification device is suitable for purifying exhaust gas by, for example, oxidizing PM contained in exhaust gas, or heating and burning with engine exhaust heat when the engine exhaust temperature becomes high.

以下，図面を参照して，この発明による排気ガス浄化装置について説明する。この排気ガス浄化装置は，排気ガス通路１９を形成するケース２内に配設されたフィルタ２０（総称）に排気ガスＧを通して排気ガス中のＰＭ，スート，ＮＯ_X，ＨＣ等の有害物質を燃焼や酸化・還元によって消失させて排気ガスを浄化するものであり，特に，フィルタ２０が金網を波板状に折り曲げて成形された波板状帯体３を筒状に巻き上げ又は積層して構成された柱状体４から構成され，柱状体４の担体１がケース２内の排気ガス流れ方向に少なくとも２個直列に配設され，波板状帯体３が柱状体４の軸方向に傾き状又はストレート状に平行に延びる多数の稜線７と該稜線７間の溝６から構成され，柱状体４には溝６に沿って多数のハニカム通路５が形成されている。更に，この排気ガス浄化装置は，フィルタ２０の上流にはＨＣ系の還元剤を排気ガス通路１９に供給する還元剤供給手段３０が配置されている。この排気ガス浄化装置は，排気ガスＧが帯体８間の溝６に沿って形成されたハニカム通路５を通過する際に，排気ガスＧ中の有害物質が帯体８に接触しつつ乱れとなって流れて燃焼或いは酸化・還元反応して，水，二酸化炭素，窒素へ変換され消失させることを特徴としている。 Hereinafter, an exhaust gas purification apparatus according to the present invention will be described with reference to the drawings. This exhaust gas purifier burns harmful substances such as PM, soot, NO _x , HC, etc. in the exhaust gas through the exhaust gas G through the filter 20 (generic name) disposed in the case 2 forming the exhaust gas passage 19. In particular, the filter 20 is made to disappear by oxidation / reduction to purify the exhaust gas. In particular, the filter 20 is formed by winding or laminating a corrugated strip 3 formed by bending a wire mesh into a corrugated sheet. And at least two carriers 1 of the columnar body 4 are arranged in series in the exhaust gas flow direction in the case 2, and the corrugated strip 3 is inclined in the axial direction of the columnar body 4. A plurality of ridgelines 7 extending in parallel in a straight shape and grooves 6 between the ridgelines 7 are formed, and a plurality of honeycomb passages 5 are formed along the grooves 6 in the columnar body 4. Further, in this exhaust gas purification device, a reducing agent supply means 30 for supplying an HC reducing agent to the exhaust gas passage 19 is disposed upstream of the filter 20. In this exhaust gas purifying device, when the exhaust gas G passes through the honeycomb passage 5 formed along the groove 6 between the strips 8, harmful substances in the exhaust gas G are in contact with the strips 8 and are disturbed. It is characterized by the fact that it flows and burns or undergoes oxidation / reduction reactions, which are converted to water, carbon dioxide, and nitrogen to disappear.

この排気ガス浄化装置において，担体１（総称）は，図６〜図８に示すように，金網から成る帯体８を成形した波板状帯体３と平板状帯体１３とを交互に配置して渦巻き状即ち螺旋状に巻き上げ又は積層して形成した構造の柱状体４に構成するか，又は，図９〜図１４に示すように，波板状帯体３同士を稜線７の傾き方向が互いに異なる状態に波板状帯体３を重ね合わせて渦巻き状即ち螺旋状に巻き上げ又は積層して形成した構造の柱状体４に構成することができる。或いは，柱状体４は，波板状帯体３単独を渦巻き状即ち螺旋状に巻き上げ又は積層して形成した構造に構成することができる。いずれのタイプの柱状体４でも，波板状帯体３の溝６に沿って柱状体４の一端面の流入口９から他端面の流出口１０へ連通した多数のハニカム通路５が形成されている。柱状体４は，全体として，円筒，角筒等の筒体に形成されている。ハニカム通路５は，端部が封止されておらず，一端面の流入口９から他端面の流出口１０へ連通してストレート又はジグザグに延びる多数のハニカム構造に形成されている。この排気ガス浄化装置では，図１又は図２に示すストレートなハニカム通路５を備えた担体１Ａは，ＨＣ，ＮＯ_X等の有害物質を浄化するのに適しており，また，図１〜図４に示すジグザグに屈折したハニカム通路５を備えた担体１Ｂは，ＨＣ，ＮＯ_Xに加えてＰＭ１８等の有害物質を浄化するのに適している。 In this exhaust gas purifying apparatus, the carrier 1 (generic name) is formed by alternately arranging corrugated strips 3 and flat strips 13 formed of strips 8 made of a wire mesh, as shown in FIGS. Then, it is formed into a columnar body 4 having a structure formed by spirally winding or spirally forming, or the corrugated strips 3 are inclined with respect to the ridgeline 7 as shown in FIGS. Can be configured as a columnar body 4 having a structure in which the corrugated strips 3 are superposed in different states from each other and wound or laminated in a spiral shape. Alternatively, the columnar body 4 can be configured in a structure formed by winding or laminating the corrugated strip 3 alone in a spiral shape, that is, a spiral shape. In any type of the columnar body 4, a large number of honeycomb passages 5 are formed along the grooves 6 of the corrugated strip 3 so as to communicate from the inlet 9 on one end surface of the columnar body 4 to the outlet 10 on the other end surface. Yes. The columnar body 4 is formed in a cylindrical body such as a cylinder or a square cylinder as a whole. The end portion of the honeycomb passage 5 is not sealed, and the honeycomb passage 5 is formed in a number of honeycomb structures that communicate from the inlet 9 on one end surface to the outlet 10 on the other end and extend straight or zigzag. In this exhaust gas purifying apparatus, the carrier 1A having the straight honeycomb passage 5 shown in FIG. 1 or FIG. 2 is suitable for purifying harmful substances such as HC, NO _x, etc. carrier 1B having a honeycomb passage 5 refracted in zigzag shown in is suitable for purifying HC, and harmful substances PM18 like in addition to the NO _X.

この排気ガス浄化装置は，図１と図２の排気ガス通路１９の上流側には，担体１Ａを構成する柱状体４がケース２内に配設され，下流側には，担体１Ｂを構成する柱状体４がケース２内に配設されている。ケース２は，例えば，排気管の途中に配設されるものであり，ケース２の端部を排気管にケース２を連結して配設することができる。また，図３と図４には，排気ガス通路１９の上下流に担体１Ｂを構成する柱状体４がケース２内に配設されている。担体１Ａは，波板状帯体３に成形された稜線７を柱状体４の軸に対して平行に延びて形成されており，波板状帯体３の溝６に沿って形成されるハニカム通路５がストレートな平行路１７に形成される。また，担体１Ｂは，波板状帯体３に成形された稜線７を柱状体４の軸に対して傾きを持って形成されており，波板状帯体３の溝６に沿って形成されるハニカム通路５は傾斜した屈折路１６に形成されている。 In this exhaust gas purifying apparatus, a columnar body 4 constituting the carrier 1A is disposed in the case 2 on the upstream side of the exhaust gas passage 19 in FIGS. 1 and 2, and a carrier 1B is constituted on the downstream side. A columnar body 4 is disposed in the case 2. For example, the case 2 is disposed in the middle of the exhaust pipe, and the end of the case 2 can be disposed by connecting the case 2 to the exhaust pipe. 3 and 4, the columnar body 4 constituting the carrier 1B is disposed in the case 2 on the upstream and downstream sides of the exhaust gas passage 19. The carrier 1 A is formed by extending a ridge line 7 formed in the corrugated strip 3 in parallel to the axis of the columnar body 4, and a honeycomb formed along the groove 6 of the corrugated strip 3. A passage 5 is formed in a straight parallel path 17. The carrier 1 B is formed with the ridge line 7 formed on the corrugated strip 3 inclined with respect to the axis of the columnar body 4, and is formed along the groove 6 of the corrugated strip 3. The honeycomb passage 5 is formed in an inclined refractive path 16.

図１には，第１実施例である排気管に配設される２種類の担体１Ａ，１Ｂで構成されたフィルタ２０Ａが示されている。フィルタ２０Ａは，排気管の排気ガスＧの流れ方向に担体１Ａと担体１Ｂとが流れに直列に配設されて組み込まれる。フィルタ２０Ａは，ケース２，ケース２内に配設された２個の柱状体４，及び柱状体４の上流に配設されたＨＣ系の還元剤を前記排気ガス通路に供給するＨＣ供給手段３０から構成されている。フィルタ２０Ａは，排気ガス通路１９の上流側にストレートガス通路１４に形成された担体１Ａが配設され，下流側に一端面の流入口９から他端面の流出口１０へ貫通してジグザグガス通路１５に形成された担体１Ｂが配設されている。また，担体１Ａと担体１Ｂとを構成する柱状体４をケース２にそれぞれ固定するため，ケース２内の上下流側に位置する柱状体４の端面に，係止部材１１をケース２に溶着することによって柱状体４をケース２内にそれぞれ固定することができる。また，図２には，第２実施例である排気管に配設される担体１Ａ，１Ｂで構成されたフィルタ２０Ｂが示されている。フィルタ２０Ｂは，排気管の排気ガスＧの流れ方向に直列に担体１Ａ，１Ｂがそれぞれ配設されて組み込まれる。フィルタ２０Ｂは，フィルタ２０Ａと同様に，ケース２，ケース２内に配設された２個の柱状体４，及び柱状体４の上流に配設されたＨＣ系の還元剤を前記排気ガス通路に供給するＨＣ供給手段３０から構成され，排気ガス通路１９の上流側にストレートガス通路１４に形成された担体１Ａが配設され，下流側にジグザグガス通路１５に形成された担体１Ｂが配設されている。図３には，第３実施例である排気管に配設される２個の担体１Ｂで構成されたフィルタ２０Ｃが示されている。フィルタ２０Ｃは，排気管の排気ガスＧの流れ方向に配設されて組み込まれる。フィルタ２０Ｃは，ケース２，ケース２内に配設された２個の柱状体４，及び柱状体４の上流に配設されたＨＣ系の還元剤を前記排気ガス通路に供給するＨＣ供給手段３０から構成されている。フィルタ２０Ｃは，排気ガス通路１９の上流側と下流側にジグザグガス通路１５に形成されたジグザグガス通路１５の担体１Ｂが配設されている。フィルタ２０Ｃは，２個の柱状体４をケース２に固定するため，ケース２内の上下流側に位置する柱状体４の端面に，係止部材１１をケース２に溶着することによって柱状体４をケース２内に固定することができる。また，図４には，第４実施例である排気管に配設される２個の担体１Ｂで構成されたフィルタ２０Ｄが示されている。フィルタ２０Ｄは，フィルタ２０Ｃと同様に，ケース２，ケース２内に配設された２個の柱状体４，及び柱状体４の上流に配設されたＨＣ系の還元剤を前記排気ガス通路に供給するＨＣ供給手段３０から構成されている。フィルタ２０Ｄは，一端面の流入口９から他端面の流出口１０へ貫通してジグザグガス通路１５に形成される。フィルタ２０Ｄは，２個の柱状体４をケース２に固定するため，柱状体４が位置するケース２の外周面を変形させて凹部１２を形成してケース２に柱状体４を固定することができる。 FIG. 1 shows a filter 20A composed of two types of carriers 1A and 1B arranged in the exhaust pipe according to the first embodiment. The filter 20A is incorporated with a carrier 1A and a carrier 1B arranged in series in the flow direction of the exhaust gas G in the exhaust pipe. The filter 20A includes an HC supply means 30 for supplying the exhaust gas passage with an HC-based reducing agent disposed upstream of the case 2, the two columnar bodies 4 disposed in the case 2, and the columnar body 4. It is composed of In the filter 20A, the carrier 1A formed in the straight gas passage 14 is disposed on the upstream side of the exhaust gas passage 19, and on the downstream side, the zigzag gas passage extends from the inlet 9 on one end surface to the outlet 10 on the other end surface. A carrier 1 B formed in 15 is disposed. Further, in order to fix the columnar bodies 4 constituting the carrier 1A and the carrier 1B to the case 2, the locking members 11 are welded to the case 2 on the end surfaces of the columnar bodies 4 located on the upstream and downstream sides in the case 2. Thus, the columnar bodies 4 can be fixed in the case 2 respectively. FIG. 2 shows a filter 20B composed of carriers 1A and 1B arranged in the exhaust pipe according to the second embodiment. The filter 20B is incorporated with carriers 1A and 1B arranged in series in the flow direction of the exhaust gas G in the exhaust pipe. Similarly to the filter 20A, the filter 20B uses two columnar bodies 4 disposed in the case 2 and the case 2 and an HC-based reducing agent disposed upstream of the columnar body 4 in the exhaust gas passage. The HC supply means 30 is configured to supply the carrier 1A formed in the straight gas passage 14 upstream of the exhaust gas passage 19, and the carrier 1B formed in the zigzag gas passage 15 downstream. ing. FIG. 3 shows a filter 20C composed of two carriers 1B arranged in the exhaust pipe according to the third embodiment. The filter 20C is arranged and incorporated in the flow direction of the exhaust gas G in the exhaust pipe. The filter 20C includes an HC supply means 30 for supplying an HC-based reducing agent disposed upstream of the columnar body 4 and the two columnar bodies 4 disposed in the case 2 and the case 2 to the exhaust gas passage. It is composed of In the filter 20 C, the carrier 1 B of the zigzag gas passage 15 formed in the zigzag gas passage 15 is disposed on the upstream side and the downstream side of the exhaust gas passage 19. In order to fix the two columnar bodies 4 to the case 2, the filter 20 C welds the locking member 11 to the case 2 on the end surfaces of the columnar bodies 4 located on the upstream and downstream sides in the case 2 to thereby form the columnar bodies 4. Can be fixed in the case 2. FIG. 4 shows a filter 20 D constituted by two carriers 1 B disposed in the exhaust pipe according to the fourth embodiment. Similarly to the filter 20C, the filter 20D uses two columnar bodies 4 disposed in the case 2 and the case 2 and an HC-based reducing agent disposed upstream of the columnar body 4 in the exhaust gas passage. HC supply means 30 for supplying is configured. The filter 20D is formed in the zigzag gas passage 15 so as to penetrate from the inlet 9 on one end surface to the outlet 10 on the other end surface. In order to fix the two columnar bodies 4 to the case 2, the filter 20 D can deform the outer peripheral surface of the case 2 where the columnar bodies 4 are located to form the recesses 12 to fix the columnar bodies 4 to the case 2. it can.

帯体８は，金網を各種の構成に織ったり，又は同等の機能を有する金属製不織布でもよいものである。波板状帯体３は，平らな帯体８を歯車状等の成形具によって幅方向に稜線７と稜線７間の溝６とに成形することによって形成でき，また，平板状帯体１３は，帯体８を平らに成形して形成できる。また，柱状体４を形成する帯体８は，その表面に有害物質を酸化・還元させて消失させる触媒を担持しているが，機能によっては触媒を担持させないこともできる。帯体８は，金網で成形されて表面に多数の凹凸が形成され，凹凸表面に触媒が担持されているので，帯体８から成る担体１は，排気ガスＧが帯体表面に接触する機会が増え，排気ガスＧの高い浄化性能を発揮できる。排気ガスＧは，担体１の帯体壁面の接触流れによって乱れ即ち乱流を起こし，排気ガスＧと触媒との接触チャンスや接触時間が増大され，有害物質の酸化・還元が促進されることになる。担体１を構成する帯体８は，常時，低温と高温の繰り返しの熱応力を受けており，その上，温度分布も帯体８の場所によって異なっている。金網は，それぞれ非常に細いワイヤで構成されているため，熱分布による変形を柔軟に許容することができ，局部的な塑性変形等が起きないので，表面にコーティングされているセラミックス等は剥がれず耐久性も優れている。担体１は，排気ガスＧの流れに乱れを起こすことにより，担体１の表面にコーティング等で担持された触媒との接触が大幅に増大され，担体１に担持された触媒の種類に無関係に浄化性能をアップでき，或いは従来のものと同等の浄化性能を得るのであれば，本発明は大幅に小型化することができる。 The band 8 may be a metal nonwoven fabric woven in various configurations or having a similar function. The corrugated strip 3 can be formed by forming a flat strip 8 into a ridgeline 7 and a groove 6 between the ridgelines 7 in the width direction using a gear-shaped molding tool. , The band 8 can be formed flat. Further, the band 8 forming the columnar body 4 carries a catalyst on its surface that causes oxidation and reduction of harmful substances to disappear, but it may not carry a catalyst depending on the function. Since the band 8 is formed of a metal mesh and has a large number of irregularities on the surface, and the catalyst is supported on the irregular surface, the carrier 1 composed of the band 8 is an opportunity for the exhaust gas G to contact the surface of the band. The exhaust gas G can be highly purified. The exhaust gas G is disturbed by the contact flow of the belt wall surface of the carrier 1, that is, the chance of contact between the exhaust gas G and the catalyst and the contact time are increased, and the oxidation / reduction of harmful substances is promoted. Become. The band 8 constituting the carrier 1 is constantly subjected to repeated thermal stresses of low and high temperatures, and the temperature distribution also varies depending on the location of the band 8. Each wire mesh is composed of very thin wires, so deformation due to heat distribution can be allowed flexibly and local plastic deformation does not occur, so the ceramic coated on the surface does not peel off. Durability is also excellent. Since the carrier 1 is disturbed in the flow of the exhaust gas G, the contact with the catalyst supported on the surface of the carrier 1 by coating or the like is greatly increased, and the carrier 1 is purified regardless of the type of catalyst supported on the carrier 1. If the performance can be improved or the purification performance equivalent to the conventional one can be obtained, the present invention can be greatly reduced in size.

また，波板状帯体３は，図示していないが，ジグザグの凹凸状の一対のロール型のプレス機等の成形具に通されるだけで，又はロール間で押圧されるのみで，稜線７と稜線７間の溝６とから成る波状に成形される。波板状帯体３の稜線７は，平行に延びる形状に，又は柱状体４の軸に対して傾きを持つ形状，具体的には，柱状体４の軸に対して流入口９から流出口１０へとジグザグに成形具で成形されている。従って，担体１は，波板状帯体３の稜線７が平行に延びて溝６に沿って多数の平行路１７を備えたもの，或いは波板状帯体３の稜線７が屈折して延びて溝６に沿って多数の屈折路１６を備えたものに形成されている。また，柱状体４は，図１６に示すように，稜線７の傾きが逆向きに延びるように互いにクロス即ち交差して重ねられた少なくとも２枚の波板状帯体３をセットとして螺旋状に巻き上げられている。図１６には，２枚の金網の帯体８を積層した状態が示され，一方の波板状帯体３を実線で示し，他方の波板状帯体３を点線で示し，波板状帯体３の稜線７が互いに交差状態に積層された状態が示されている。或いは，図示していないが，波板状帯体３に成形された稜線７は，柱状体４の軸に対して所定の長さだけ傾きを持つ部分と所定の長さだけ平行に延びる部分とが交互に繰り返して形成することもできる。 Further, the corrugated belt 3 is not shown in the figure, but it is merely passed through a forming tool such as a pair of zigzag concavo-convex roll-type presses, or only pressed between rolls, and the ridgeline 7 and a groove 6 formed between the ridgeline 7 and the groove 6. The ridge line 7 of the corrugated strip 3 has a shape extending in parallel or having an inclination with respect to the axis of the columnar body 4, specifically, an outlet from the inlet 9 with respect to the axis of the columnar body 4. 10 is formed in a zigzag with a forming tool. Accordingly, the carrier 1 is one in which the ridge line 7 of the corrugated strip 3 extends in parallel and includes a large number of parallel paths 17 along the groove 6 or the ridge line 7 of the corrugated strip 3 refracts and extends. And a plurality of refractive paths 16 along the groove 6. In addition, as shown in FIG. 16, the columnar body 4 is spirally formed by setting at least two corrugated strips 3 that are crossed or crossed so that the inclination of the ridge line 7 extends in the opposite direction. It is rolled up. 16 is shown two states of the strip 8 was laminated wire mesh is shown one of the corrugated band member 3 by a solid line, it shows the other corrugated band member 3 by a dotted line, the corrugated plate The state where the ridgelines 7 of the strip 3 are stacked in an intersecting state is shown. Or although not shown in figure, the ridgeline 7 shape | molded by the corrugated strip 3 is a part which inclines only predetermined length with respect to the axis | shaft of the columnar body 4, and a part extended in parallel only predetermined length. Can be formed alternately and repeatedly.

担体１を構成する波板状帯体３に形成した屈折路１６では，図１２に示すように，排気ガスＧが矢印で示す方向に流れる。担体１は，図１２〜図１４に示されるように，排気ガスＧが波板状帯体３間に形成された屈折路１６を通過する際に，排気ガス中のＰＭ１８は，波板状帯体３に接触しつつ流れ又は稜線７間の溝６で形成される屈折路１６の屈折部分等の領域で一旦滞留し，そこで徐々にＰＭ１８が酸化燃焼して焼却される。排気ガスＧに含まれたＰＭ１８は，排気ガスＧと共に屈折路１６を流れるに従って波板状帯体３の帯体壁面に接触しつつ流れて帯体８の金網に担持されている触媒の助けで消失されるが，ＰＭ１８の一部は屈折路１６の屈折部分等の領域で一旦滞留し，そこで，排気ガス温度が高くなって排気熱で加熱焼却又はＮＯ₂により酸化消失し，或いは，徐々に触媒の助けで酸化燃焼して焼却されることになり，屈折路１６は，ＰＭ１８で閉塞されることなく，排気ガスＧが常にスムーズに流れるように連通している。 In the refractive path 16 formed in the corrugated plate 3 constituting the carrier 1, the exhaust gas G flows in the direction indicated by the arrow as shown in FIG. As shown in FIG. 12 to FIG. 14, when the exhaust gas G passes through the refraction path 16 formed between the corrugated strips 3, the carrier 1 causes the PM 18 in the exhaust gas to correlate with the corrugated strip. While staying in contact with the body 3, it temporarily stays in a region such as a refraction portion of the refraction path 16 formed by the flow or the groove 6 between the ridges 7, where PM 18 gradually oxidizes and burns and burns. The PM 18 contained in the exhaust gas G flows along with the exhaust gas G along the refraction path 16 while being in contact with the wall surface of the corrugated strip 3 and with the aid of the catalyst supported on the wire mesh of the strip 8. Although part of the PM 18 is temporarily lost in a region such as a refracted portion of the refractive path 16, the exhaust gas temperature becomes high and the exhaust gas is heated and burned by exhaust heat or oxidized and lost by NO ₂ , or gradually. The refraction path 16 is communicated so that the exhaust gas G always flows smoothly without being blocked by the PM 18 without being blocked by the PM 18.

この排気ガス浄化装置は，図１５では，（Ａ）の（ａ）が断面図，（ｂ）が平面図であり，ガス流速が遅い場合の排気ガスＧの流れを示している。また，図１５では，（Ｂ）の（ａ）は断面図，（ｂ）は平面図であり，ガス流速が速い場合の排気ガスＧの流れを示している。図１５に示すように，排気ガスＧの流速が速いほど，排気ガスＧはフィルタ２０の筒内に平行に流れようとするので，排気ガスＧの流れに僅かな角度即ち屈折路１６を与えることにより，排気ガスＧに含まれるＰＭをハニカム通路５を形成する金網の壁面に付着させながら流れるからであり，ガス流速が速い場合は遅い場合よりはるかに筒内で平行して流れる特性が強くなり，その結果，ハニカム通路５の壁を構成する金網を突き抜けて流れ，ＰＭを壁に付着させてＰＭを除去する特性が弱まり，ＰＭ浄化率が小さくなるからである。同様に，ガス流速が小さい場合にはガス流速が高い場合の逆の特性になる。この排気ガス浄化装置では，波板状帯体３の稜線７は，柱状体４の軸に対してジグザグの傾きの角度が同一又は異なっており，その範囲は柱状体４の軸に対してほぼ１０°〜５０°の角度に傾いて，ハニカム通路５の傾斜路である屈折路１６に形成されている。また，柱状体４は，筒状ケース２内に複数個直列に配設され，柱状体４の波板状帯体３の稜線７の傾き角度は，排気ガスＧの上流側と下流側とで同一又は異なっているものである。ハニカム通路５での排気ガスＧの流れを考慮すると，稜線７の傾き角度は１０°〜５０°であることが好ましい。 In FIG. 15, (A) (a) is a cross-sectional view, and (b) is a plan view of this exhaust gas purifying device, and shows the flow of the exhaust gas G when the gas flow rate is low. In FIG. 15, (B) (a) is a cross-sectional view, and (b) is a plan view, showing the flow of the exhaust gas G when the gas flow velocity is high. As shown in FIG. 15, the higher the flow rate of the exhaust gas G, the more the exhaust gas G tends to flow in the cylinder of the filter 20, so that a slight angle, that is, a refraction path 16 is given to the flow of the exhaust gas G. This is because the PM contained in the exhaust gas G flows while adhering to the wall surface of the wire mesh forming the honeycomb passage 5, and when the gas flow rate is fast, the characteristics of flowing in parallel in the cylinder are much stronger than when it is slow. As a result, the characteristic of removing the PM by adhering to the wall by flowing through the wire mesh constituting the wall of the honeycomb passage 5 is weakened, and the PM purification rate is reduced. Similarly, when the gas flow rate is small, the characteristics are opposite to those when the gas flow rate is high. In this exhaust gas purifying device, the ridgeline 7 of the corrugated strip 3 has the same or different zigzag inclination angle with respect to the axis of the columnar body 4, and the range thereof is substantially the same as the axis of the columnar body 4. Inclined at an angle of 10 ° to 50 °, it is formed in a refractive path 16 that is an inclined path of the honeycomb passage 5. A plurality of columnar bodies 4 are arranged in series in the cylindrical case 2, and the inclination angle of the ridge line 7 of the corrugated strip 3 of the columnar body 4 is different between the upstream side and the downstream side of the exhaust gas G. They are the same or different. Considering the flow of the exhaust gas G in the honeycomb passage 5, the inclination angle of the ridge line 7 is preferably 10 ° to 50 °.

担体１に担持させた触媒は，三元触媒，酸化触媒，ＮＯ_X還元触媒（ＮＯ_X選択還元触媒）を用いることができる。本発明は，三元触媒，酸化触媒，ＮＯ_X還元触媒のいずれの触媒を用いても，浄化性能を大幅に向上させることができ，従来の担体と同等の浄化性能を確保するのであれば，大幅に小形化でき，低コストに製造することができる。担体１に担持させる触媒について，図５に示すように，白金系のＮＯ_X還元触媒は，２００℃程度で還元率がピークであるため，上流側の担体に担持させた４００℃ピークの銀系のＮＯ_X還元触媒と組み合わせることで，２００℃から４００℃の範囲の高い範囲でＮＯ_X還元性能を発揮させることができる。また，ＨＣの還元剤を用いるＮＯ_X還元触媒は，排気ガスＧと排気ガスＧに混合された還元剤を均一に混合することが極めて重要である。車両に搭載する浄化システムの場合は，極めて狭いスペースにおいて排気ガスＧと還元剤を均一に分散，混合させる必要がある。従来の担体では排気ガスＧに対する還元剤の濃淡が生じて困難なことであるが，本発明のフィルタ２０は金網で作製されているので，分散混合がスムーズに達成される。この排気ガス浄化装置は，ＰＭを捕集することを目的の１つに構成しているが，その他，ＮＯ_X還元触媒をフィルタ２０に担持することもできる。軽油を還元剤として用いるＮＯ_X還元触媒は，触媒として白金，銀等を用いる場合が多い。これらの場合には，ＰＭを燃焼させる効果を有するので，フィルタ２０にＮＯ_X還元触媒を担持することで，ＰＭを捕集燃焼させて浄化することと同時に，ＮＯ_X浄化を行い，それによって，この排気ガス浄化装置をＮＯ_X，ＰＭを同時に浄化する機能を持たせることができる。この排気ガス浄化装置は，フィルタ２０にゼオライト等を用いたＮＯ_X還元触媒を担持することもでき，この場合もＮＯ_X浄化とＰＭ捕集浄化を同時に同じフィルタ２０で行うことができ，装置そのものを小形化し，低コスト化が達成できる。また，従来のセラミックスハニカムやメタルハニカムの担体は，排気ガスの入口から入った排気ガスがいずれか１つのセルの中を流れ，隣のセルの排気ガスとは混ざることがなく，担体の出口に到達する。しかしながら，本発明の担体１は，１つのセルは流入口９から流出口１０までストレートに延びると共に，セルと隣接するセルとは金網の多孔を通じて連通しているので，排気ガスＧが混合しながら流れて混合が促進され，それによって担体１の流入口９での還元剤の均一性が多少悪くても，排気ガスＧが担体１を流れる間に排気ガスＧと還元剤との混合が継続され，結果として，極めて高い浄化率を得ることができる。 Catalyst supported on a carrier 1, it is possible to use a three-way catalyst, oxidation catalyst, NO _X reduction catalysts (NO _X selective reduction catalyst). The present invention is a three-way catalyst, oxidation catalyst, using any of the catalysts of the NO _X reduction catalyst, the purification performance can be greatly improved, if the securing conventional carriers equivalent purification performance, The size can be greatly reduced, and it can be manufactured at low cost. For the catalyst to be supported on the carrier 1, as shown in FIG. 5, a platinum-based NO _X reduction catalyst are the peak reduction rate at about 200 ° C., 400 ° C. silver-based peaks were supported on a carrier on the upstream side In combination with the NO _x reduction catalyst, NO _x reduction performance can be exhibited in a high range of 200 ° C. to 400 ° C. In addition, in the NO _x reduction catalyst using the HC reducing agent, it is extremely important to uniformly mix the exhaust gas G and the reducing agent mixed in the exhaust gas G. In the case of a purification system mounted on a vehicle, it is necessary to uniformly disperse and mix the exhaust gas G and the reducing agent in an extremely narrow space. In the conventional carrier, the concentration of the reducing agent with respect to the exhaust gas G is difficult to produce. However, since the filter 20 of the present invention is made of a wire mesh, the dispersion and mixing can be achieved smoothly. This exhaust gas purifying device is configured to collect PM, but it is also possible to carry a NO _x reduction catalyst on the filter 20. NO _X reduction catalyst using light oil as the reducing agent, a platinum as the catalyst, is often used silver. In these cases, because it has the effect of burning the PM, by carrying NO _X reduction catalyst filter 20, simultaneously with purifying by collecting burn the PM, it performs NO _X purification, whereby, the exhaust gas purifying apparatus NO _X, can have the function of purifying the PM simultaneously. The exhaust gas purification device can also carry a NO _X reduction catalyst using zeolite in the filter 20, in this case also can do NO _X purification and PM trapping purification at the same time on the same filter 20, the device itself Can be miniaturized and cost reduction can be achieved. Also, in the conventional ceramic honeycomb or metal honeycomb carrier, the exhaust gas entering from the exhaust gas inlet flows through one of the cells and does not mix with the exhaust gas of the adjacent cell. To reach. However, in the carrier 1 of the present invention, one cell extends straight from the inflow port 9 to the outflow port 10, and the cell and the adjacent cell communicate with each other through the perforations of the wire mesh, so that the exhaust gas G is mixed. Even if the uniformity of the reducing agent at the inlet 9 of the carrier 1 is somewhat poor, mixing of the exhaust gas G and the reducing agent is continued while the exhaust gas G flows through the carrier 1. As a result, a very high purification rate can be obtained.

また，帯体８を構成する金網は，ステンレス鋼又は鉄クロムアルミ合金のワイヤから構成されている。また，帯体８を構成する金網のワイヤの線径は，０．０３ｍｍ〜０．２５ｍｍであることが好ましく，また，波板状帯体３と平板状帯体１３を構成する金網のメッシュは３０〜２００メッシュであることが好ましい。更に，担体１即ちフィルタ２０は，少なくとも２枚の帯体８をセットとして波板状を成形する場合に，内側の帯体８の金網のメッシュを細かくし，外側の帯体８の金網のメッシュを粗くしたものである。帯体８の金網のメッシュは，帯体８の縦線と横線とのメッシュ数が異なっており，帯体８の縦線のメッシュ数が帯体８の横線のメッシュ数より多くなっている。この実施例では，帯体８の縦線のメッシュ数が３０〜１００メッシュであり，帯体８の横線のメッシュ数が６０〜２００メッシュになるように設定されている。言い換えれば，帯体８の縦線とは，帯体８の長手方向に延びるワイヤであり，帯体８の横線とは，帯体８の幅方向に延びるワイヤである。一般に，帯体８を形成する金網は，縦線と横線とで織り上げるが，金網を織るスピードは，横線のメッシュ数によって拘束される。横線のメッシュ数が多い場合には，織機で１回で織られる速度が遅くなり，即ち，織りの所要時間が長くなり，その結果，金網を織るための作業コストは高くなる。しかしながら，縦線のメッシュ数が多い場合には縦線を織機にセットする作業が若干多くなるが，横線のメッシュ数が少なくて済み，そのため，織りの所要時間が大幅に短くなり，織り作業効率が上がる。従って，金網の製造コストを低減するには，織機によって織る速度が速くなるように横線のメッシュ数を減らすことが有効である。一方，単位面積当たりの表面積は，例えば，縦糸が８０メッシュと横糸が８０メッシュから成る金網と，縦糸が１２０メッシュと横糸が４０メッシュから成る金網とは，等しくなって担体１の性能も同様になる。 Further, the wire mesh constituting the band body 8 is made of stainless steel or iron-chromium aluminum alloy wire. The wire diameter of the wire mesh constituting the band 8 is preferably 0.03 mm to 0.25 mm, and the mesh of the wire mesh constituting the corrugated belt 3 and the flat belt 13 is It is preferable that it is 30-200 mesh. Further, the carrier 1, that is, the filter 20, when forming a corrugated plate with a set of at least two strips 8, the mesh of the inner band 8 is made fine, and the mesh of the outer band 8 is meshed. Is roughened. The mesh of the metal mesh of the band 8 is different in the number of meshes of the vertical line and the horizontal line of the band 8, and the number of meshes of the vertical line of the band 8 is larger than the number of meshes of the horizontal line of the band 8. In this embodiment, the number of vertical lines of the band 8 is set to 30 to 100 mesh, and the number of horizontal lines of the band 8 is set to 60 to 200 mesh. In other words, the vertical line of the band body 8 is a wire extending in the longitudinal direction of the band body 8, and the horizontal line of the band body 8 is a wire extending in the width direction of the band body 8. In general, the metal mesh forming the band 8 is woven by vertical lines and horizontal lines, but the speed of weaving the metal mesh is constrained by the number of meshes of the horizontal lines. If the number of meshes in the horizontal line is large, the speed of weaving at a time by the loom becomes slow, that is, the time required for weaving becomes long, and as a result, the work cost for weaving the wire mesh increases. However, when the number of vertical line meshes is large, the work of setting the vertical lines on the loom is slightly increased, but the number of horizontal line meshes is reduced, so that the time required for weaving is significantly shortened and the weaving work efficiency is reduced. Goes up. Therefore, in order to reduce the production cost of the wire mesh, it is effective to reduce the number of meshes of horizontal lines so that the weaving speed is increased by the loom. On the other hand, the surface area per unit area is the same for, for example, a wire mesh composed of 80 mesh warp and 80 mesh weft, and a wire mesh composed of 120 mesh warp and 40 mesh weft. Become.

また，図７に示すように，波板状帯体３の稜線７と溝６とのサイズについて，稜線７間の即ち凸凹のピッチＰは，１ｍｍ〜６ｍｍに設定されることが好ましいものであり，ピッチＰが１ｍｍ以下であるとハニカム通路５が狭過ぎてＰＭ等が詰まる傾向になり，また，６ｍｍ以上であるとハニカム通路５が広過ぎて排気ガスＧの触媒への接触が十分でなくなる。また，担体１の稜線７間のピッチＰの大きさは，長手方向において同一又は変更することによってハニカム通路５の幅サイズを変更でき，排気ガスＧの流れに好ましい乱れを発生させることができる。例えば，波板状帯体３について，ピッチＰの大きさは，図示していないが，流れの上流側を大きく下流側を小さくなるものと逆にしたものとを交互に形成したり，又は長手方向に同一の大きさに形成することができる。波板状帯体３の稜線７のピッチを小さく形成するほどＰＭの捕集割合は高くなるが，一方，稜線７のピッチが小さすぎると，ＰＭによるフィルタ２０の詰まりが生じる場合がある。従って，この排気ガス浄化装置では，高い捕集率を得るためには，波板状帯体３を比較的にピッチの小さいものに作製し，部分的にピッチの大きいものを巻き込むことが有効になる。走行する上で，長時間にわたってＰＭが燃焼せずに，フィルタに堆積する場合でも，ピッチの大きな部分は閉塞することが無いので，多少エンジン出力は低下するが，走行に支障は発生しない。フィルタ２０における波板状帯体３の稜線７のピッチを，上流側を大きく下流側を小さく形成したフィルタ壁と，上流側のピッチを小さく下流側のピッチを大きく形成したフィルタ壁とを交互に組み合わせると，排気ガスＧの流れに対して排気ガスＧの一部がフィルタ壁を通過する量を適切に調整することができ，ＰＭ捕集率を調整することができる。更に，波板状帯体３は，稜線７と溝６との波板の凸凹の高さＨは，０．５ｍｍ〜５ｍｍであることが好ましいものであり，高さＨが０．５ｍｍ以下であるとハニカム通路５が低過ぎてＰＭ等が詰まる傾向になり，また，５ｍｍ以上であるとハニカム通路５が高過ぎて排気ガスＧの触媒への接触が十分でなくなる。フィルタ２０は，稜線７間のピッチＰ及び稜線７と溝６との凸凹の高さＨを調整することによって，屈折路１６又は平行路１７の大きさを調節することができ，排気ガスＧの流れを調節できるものであり，エンジンの大きさや性能に対応してこれらのサイズを決定すればよい。 In addition, as shown in FIG. 7, with respect to the size of the ridge line 7 and the groove 6 of the corrugated belt member 3, the pitch P between the ridge lines 7, that is, the uneven pitch P is preferably set to 1 mm to 6 mm. When the pitch P is 1 mm or less, the honeycomb passage 5 is too narrow and PM or the like tends to be clogged. When the pitch P is 6 mm or more, the honeycomb passage 5 is too wide to contact the exhaust gas G with the catalyst. . Moreover, the width P of the honeycomb passage 5 can be changed by changing the width P between the ridge lines 7 of the carrier 1 to be the same or changed in the longitudinal direction, and a preferable disturbance can be generated in the flow of the exhaust gas G. For example, with respect to the corrugated belt 3, the pitch P is not shown in the figure, but the upstream side of the flow is reversed and the downstream side is alternately formed, or the longitudinal length of the corrugated strip 3 is elongated. It can be formed in the same size in the direction. As the pitch of the ridge line 7 of the corrugated strip 3 is made smaller, the PM collection rate becomes higher. On the other hand, if the pitch of the ridge line 7 is too small, the filter 20 may be clogged by PM. Therefore, in this exhaust gas purifying apparatus, in order to obtain a high collection rate, it is effective to manufacture the corrugated strip 3 with a relatively small pitch and partially entrain the one with a large pitch. Become. Even when PM does not burn for a long time and accumulates on the filter during traveling, the large pitch portion is not blocked, so the engine output is somewhat reduced, but there is no trouble in traveling. In the filter 20, the pitch of the ridge line 7 of the corrugated strip 3 is alternately made up of a filter wall formed with a large upstream side and a small downstream side, and a filter wall formed with a small upstream side pitch and a large downstream side pitch. When combined, the amount of the exhaust gas G passing through the filter wall with respect to the flow of the exhaust gas G can be adjusted appropriately, and the PM collection rate can be adjusted. Further, in the corrugated belt 3, the height H of the corrugated plate of the ridge line 7 and the groove 6 is preferably 0.5 mm to 5 mm, and the height H is 0.5 mm or less. If it is, the honeycomb passage 5 is too low and PM or the like tends to be clogged, and if it is 5 mm or more, the honeycomb passage 5 is too high and the exhaust gas G does not contact the catalyst sufficiently. The filter 20 can adjust the size of the refractive path 16 or the parallel path 17 by adjusting the pitch P between the ridge lines 7 and the height H of the unevenness between the ridge line 7 and the groove 6, and the exhaust gas G can be adjusted. The flow can be adjusted, and these sizes should be determined according to the size and performance of the engine.

担体１を構成する帯体８の金網には，アルミナ（Ａｌ₂Ｏ₃），シリカ（ＳｉＯ₂），ジルコニア（ＺｒＯ₂），セリア（ＣｅＯ₂），チタニア（ＴｉＯ₂）の少なくとも１種類以上のセラミックスがコーティングされている。即ち，担体１を構成する担体基材には，シリカ，アルミナ，セリア，チタニア，ジルコニアのいずれか一種又はそれらの少なくとも１種類を含む複合酸化物粉末が予め被覆されている。更に，帯体８の基材を被覆したセラミックスのコーティング層の表面には，白金（Ｐｔ），銀（Ａｇ），カリウム（Ｋ），パラジウム（Ｐｄ），イリジウム（Ｉｒ），鉄（Ｆｅ），銅（Ｃｕ），バリウム（Ｂａ），ルテニウム（Ｒｕ），ロジウム（Ｒｈ）の少なくとも１種類以上の酸化・還元触媒が担持されているものである。 The wire mesh band member 8 constituting the carrier 1, of alumina (Al ₂ O _3), silica (SiO _2), zirconia (ZrO _2), ceria (CeO _2), titania (TiO ₂₎ at least one compound or more The ceramics are coated. That is, the carrier base material constituting the carrier 1 is preliminarily coated with any one of silica, alumina, ceria, titania, zirconia, or a composite oxide powder containing at least one of them. Furthermore, on the surface of the ceramic coating layer covering the base material of the band 8, platinum (Pt), silver (Ag), potassium (K), palladium (Pd), iridium (Ir), iron (Fe), At least one oxidation / reduction catalyst of copper (Cu), barium (Ba), ruthenium (Ru), and rhodium (Rh) is supported.

また，図１７に示すように，担体１から成るフィルタ２０は，過大な振動等の外力が負荷される環境，又は大きな熱応力を受ける環境で使用される場合には，フィルタ２０を構成する波板状帯体３と平板状帯体１３又は波板状帯体３同士は，分解や変形を阻止するためニッケルを主体としたロウ材で互いに接合することができる。フィルタ２０は，６００℃以上の高温下で使用される場合，波板状帯体３及び／又は平板状帯体１３の帯体８同士をロウ材で接合することが，フィルタ２０の帯体８の熱変形が抑制されて好ましいものである。例えば，フィルタ２０の一方の端面２５又は両端面２５は，ロウ材で接合線２３（総称は２３）で互いに接合されている。具体的には，ロウ接部は，図１７の（Ａ）又は（Ｂ）に示すように，予め決められた幅を持って放射曲線状に延びる間欠的な線状の接合線２３Ａ，２３Ｂ，又は図１７の（Ｃ）に示すように，外周側に広くなった幅を持って放射曲線状に延びる接合線２３Ｃになっている。図１７の（Ａ）では，帯体８の端面に付与する結合力を均等にするため外周側になるに従って接合線２３Ａを増大させた構成，即ち，最外周部には１２本の接合線２３Ａ，中間部には８本の接合線２３Ａ，最内周部には４本の接合線２３Ａで接合されている。図１７の（Ｂ）では，ロウ材の接合線２３に不要な外力がかからない構成，即ち，接合線２３Ｂにカット部２４を形成して接合されている。更に，図１７の（Ｃ）では，帯体８の端面に接合線２３で付与する結合力を均等にするため，外周側になるに従って接合線２３Ｃの太さ即ち幅を大きく形成している。更に，フィルタ２０は，波板状帯体３の巻き上げ時に，重なる波板状帯体３の稜線７と帯体８とが接する予め決められた領域の部位にロウ材を塗布又はロウ材箔を配設して帯体８同士がロウ接されている。更に，帯体８同士がロウ接される予め決められた領域の部位は，フィルタ２０を構成する隣接する帯体８間で柱状体４の軸方向で互いに位置ずれしていることが好ましい。 In addition, as shown in FIG. 17, the filter 20 made of the carrier 1 is used in an environment in which an external force such as excessive vibration is applied or an environment that receives a large thermal stress. The plate-like strip 3 and the plate-like strip 13 or the corrugated strips 3 can be joined to each other with a brazing material mainly composed of nickel in order to prevent decomposition and deformation. When the filter 20 is used at a high temperature of 600 ° C. or higher, the band body 8 of the filter 20 may be formed by joining the band bodies 8 of the corrugated plate body 3 and / or the plate-like band body 13 with a brazing material. This is preferable because thermal deformation of the resin is suppressed. For example, one end face 25 or both end faces 25 of the filter 20 are joined to each other with a joining line 23 (generally referred to as 23) with a brazing material. Specifically, as shown in FIG. 17 (A) or (B), the brazing contact portion has intermittent linear joining lines 23A, 23B, extending in a radial curve shape with a predetermined width. Alternatively, as shown in FIG. 17C, the joint line 23C extends in a radial curve shape with a wide width on the outer peripheral side. In FIG. 17A, a configuration in which the joining line 23A is increased toward the outer peripheral side in order to equalize the coupling force applied to the end face of the band member 8, that is, the twelve joining lines 23A are arranged at the outermost peripheral part. The middle part is joined by eight joining lines 23A, and the innermost part is joined by four joining lines 23A. In FIG. 17B, a configuration in which an unnecessary external force is not applied to the bonding line 23 of the brazing material, that is, the cut line 24 is formed and bonded to the bonding line 23B. Further, in FIG. 17C, in order to equalize the bonding force applied to the end face of the band 8 by the bonding line 23, the thickness, that is, the width of the bonding line 23C is increased toward the outer peripheral side. Further, when the corrugated strip 3 is wound up, the filter 20 applies a brazing material or a brazing foil to a predetermined region where the ridge line 7 and the strip 8 of the corrugated strip 3 overlap each other. The belt bodies 8 are brazed with each other. Furthermore, it is preferable that the portions of the predetermined region where the band bodies 8 are in contact with each other are displaced from each other in the axial direction of the columnar body 4 between the adjacent band bodies 8 constituting the filter 20.

本発明品の金網を用いた担体１から成るフィルタ２０は，その柱状体４の筒体の両端面２５をロウ付けするだけで熱応力に強い強度を得ることができる。金網は，ワイヤに着目するとあらゆる方向に対して柔軟であるため，接合部を両端のみとしても，機会応力，熱応力を受け難くなり，十分な強度のフィルタ２０を得ることができる。即ち，担体１は，常時低温と高温とを繰り返し受けているが，更に温度分布も担体１の場所により異なっているが，フィルタ２０は金網で作製されており，非常に細いワイヤで構成されているので，熱分布による変形を非常に柔軟に受け止めることができ，塑性変形等が起きない。従って，ロウ接合でも，接合部を分散させることで，担体の優れた特性を活かすことができる。フィルタ２０の端面２５をロウ付けする場合には，接合線２３を担体筒体中心軸を通る放射曲線状に延ばすと，担体１がそのロウ接部分の剛性を高くするので，その放射曲線状のロウ接合部で拘束され，柔軟性が損なわれる。そこで，接合線２３を放射曲線状に延ばす場合に，渦巻き状等の曲状に延ばすことにより外圧に対する抵抗力を弱めることができ，その場合に接合線２３を所々で接合せずにカット部２４を設けることによって一段と高い柔軟性を得ることができる。また，接合線２３の面積を増大させることで，フィルタ２０の強度が高くなる。触媒付きフィルタ２０は，通常その前後で圧力が異なるため，所定の力を受けている。担体１は，該所定の力によってかかる担体１の剪断は，半径に比例して外周部の方が高くなるので，フィルタ２０の端面２５をロウ接合する場合は，外周ほど接合面積を増やすことが好ましい。また，波板状帯体３の金網は，完成時の柱状体４の軸方向に斜めに傾いて稜線７が存在しているので，帯体８を巻き上げた時に，ロウ材を塗布又はロウ箔を挟むには，帯体８同士が接する領域にロウ材又はロウ箔が位置するようにする。しかしながら，帯体８同士の接する領域は，常に変化するので，ロウ材を有効に機能させるためには，ジグザグ状の稜線７を画像で読み込み，帯体８を巻き上げた時に，帯体８同士が接する領域に適切にロウ材を位置させることが好ましい。 The filter 20 composed of the carrier 1 using the wire mesh of the present invention can obtain a strength strong against thermal stress only by brazing both end faces 25 of the cylindrical body of the columnar body 4. Since the wire mesh is flexible in all directions when attention is paid to the wire, even if the joint is only at both ends, it becomes difficult to receive the opportunity stress and the thermal stress, and the filter 20 having sufficient strength can be obtained. That is, the carrier 1 is constantly subjected to low temperature and high temperature repeatedly, and the temperature distribution varies depending on the location of the carrier 1, but the filter 20 is made of a wire mesh and is composed of very thin wires. Therefore, deformation due to heat distribution can be received very flexibly, and plastic deformation does not occur. Therefore, even in brazing, the excellent characteristics of the carrier can be utilized by dispersing the joint. When brazing the end face 25 of the filter 20, if the joining line 23 is extended in a radial curve shape passing through the center axis of the carrier cylinder, the carrier 1 increases the rigidity of the brazing portion, so that the radial curve shape Restrained at the solder joint, the flexibility is impaired. Therefore, when the joining line 23 is extended in the shape of a radial curve, the resistance to external pressure can be weakened by extending it in a spiral shape or the like. In this case, the cut portion 24 is not joined without joining the joining line 23 in some places. By providing this, it is possible to obtain higher flexibility. Further, the strength of the filter 20 is increased by increasing the area of the joining line 23. The catalyst-equipped filter 20 usually receives a predetermined force because the pressure is different before and after the filter. Since the carrier 1 is sheared by the predetermined force at the outer peripheral portion in proportion to the radius, when the end face 25 of the filter 20 is joined by soldering, the joint area can be increased toward the outer periphery. preferable. Further, the wire net of the corrugated strip 3 has a ridge line 7 inclined obliquely in the axial direction of the columnar body 4 at the time of completion. Therefore, when the strip 8 is rolled up, a brazing material is applied or brazed foil In order to sandwich the brazing material, the brazing material or the brazing foil is positioned in a region where the strips 8 are in contact with each other. However, since the area where the belts 8 are in contact with each other always changes, in order to make the brazing material function effectively, when the zigzag ridge line 7 is read as an image and the belts 8 are rolled up, It is preferable that the brazing material is appropriately positioned in the contact area.

この発明による排気ガス浄化装置は，エンジン，バーナ，ガス発生源等からの排気ガスを排気通路に配設したフィルタに通し，排気ガスに含まれる粒子状物質，スート，ＨＣ，ＮＯ_X等の有害物質を触媒の助けで燃焼させ，又は酸化・還元によって変換して消失させる排気ガスを浄化するもの，例えば，新車又は既存車のエンジン，特に，ディーゼルエンジンからの排気ガスを排出する排気管に配設されるフィルタに適用して好ましいものである。 The exhaust gas purifying apparatus according to the present invention passes exhaust gas from an engine, burner, gas generation source, etc. through a filter disposed in the exhaust passage, and harmful substances such as particulate matter, soot, HC, NO _X contained in the exhaust gas. Purifying exhaust gas that burns with the aid of a catalyst or that is converted and lost by oxidation / reduction, for example, in an exhaust pipe that discharges exhaust gas from new or existing engines, especially diesel engines. This is preferable when applied to a filter provided.

この発明による排気ガス浄化装置の第１実施例を示し，ケース内に担体の柱状体を直列に２個配設した状態で柱状体の両側端を係止部材でケースに固定した状態を示す説明図である。1 shows a first embodiment of an exhaust gas purifying apparatus according to the present invention, and shows a state in which two columnar bodies of a carrier are arranged in series in a case and both side ends of the columnar body are fixed to a case by a locking member. FIG. この発明による排気ガス浄化装置の第２実施例を示し，ケース内に担体の柱状体を直列に２個配設した状態でケースが凹部で柱状体をケースに固定した状態を示す説明図である。FIG. 8 is an explanatory view showing a second embodiment of the exhaust gas purifying apparatus according to the present invention, and showing a state in which two columnar bodies of the carrier are arranged in series in the case and the case is recessed and the columnar body is fixed to the case. . この発明による排気ガス浄化装置の第３実施例を示し，ケース内に担体の柱状体を直列に２個配設した状態で柱状体の両側端を係止部材でケースに固定した状態を示す説明図である。FIG. 6 shows a third embodiment of the exhaust gas purifying apparatus according to the present invention, and shows a state in which two columnar bodies of the carrier are arranged in series in the case and both side ends of the columnar body are fixed to the case by locking members. FIG. この発明による排気ガス浄化装置の第４実施例を示し，ケース内に担体の柱状体を直列に２個配設した状態でケースが凹部で柱状体をケースに固定した状態を示す説明図である。FIG. 9 is an explanatory view showing a fourth embodiment of the exhaust gas purifying apparatus according to the present invention, and showing a state in which two columnar bodies of a carrier are arranged in series in the case and the case is recessed and the columnar body is fixed to the case. . この排気ガス浄化装置における触媒について温度に対する効果のピーク時を示すグラフである。It is a graph which shows the peak time of the effect with respect to temperature about the catalyst in this exhaust gas purification apparatus. この発明による排気ガス浄化装置における担体の一例であって，波板状帯体と平板状帯体とを重ね合わせて巻き上げて形成する工程を示す説明図である。It is an example of the support | carrier in the exhaust-gas purification apparatus by this invention, Comprising: It is explanatory drawing which shows the process formed by superimposing and winding up a corrugated strip and a flat strip. 図６の担体を構成する波板状帯体と平板状帯体との重ね状態を示す正面図である。It is a front view which shows the overlapping state of the corrugated sheet | seat body which comprises the support | carrier of FIG. 図７の重ね帯体を螺旋状に巻き上げて形成した柱状体を示す正面図である。It is a front view which shows the columnar body formed by winding up the overlapping band body of FIG. この発明による排気ガス浄化装置における担体の別の例であって，稜線の傾き方向を互いに異なる方向に重ね合わせた波板状帯体を巻き上げて柱状体を形成する工程を示す斜視図である。It is another example of the support | carrier in the exhaust-gas purification apparatus by this invention, Comprising: It is a perspective view which shows the process of winding up the corrugated strip which piled up the inclination direction of a ridgeline in a mutually different direction, and forming a columnar body. 図９の波板状帯体を巻き上げた柱状体を示す正面図である。It is a front view which shows the columnar body which wound up the corrugated sheet | seat body of FIG. 図１０の柱状体を示す側面図である。It is a side view which shows the columnar body of FIG. 図９の柱状体を構成する２枚の波板状帯体の稜線を交差状態に配設した状態を示す説明図である。It is explanatory drawing which shows the state which has arrange | positioned the ridgeline of the two corrugated strips which comprise the columnar body of FIG. 9 in the crossing state. 図１２の柱状体のＡ−Ａ断面を示す断面図である。It is sectional drawing which shows the AA cross section of the columnar body of FIG. 図１２のＢ−Ｂ断面を示す断面図である。It is sectional drawing which shows the BB cross section of FIG. 柱状体の溝に沿って形成されたハニカム通路を排気ガスが流れる時の状態を示し，（Ａ）は排気ガスの流速が遅い時の状態を示し，（Ｂ）は排気ガスの流速が速い時の状態を示す説明図である。The state when the exhaust gas flows through the honeycomb passage formed along the groove of the columnar body is shown, (A) shows the state when the exhaust gas flow rate is slow, and (B) shows the state when the exhaust gas flow rate is high. It is explanatory drawing which shows the state of. フィルタの柱状体を構成する２枚の帯体の稜線を交差して配設した状態を示す説明図である。It is explanatory drawing which shows the state arrange | positioned crossing the ridgeline of the two strip | belt bodies which comprise the columnar body of a filter. フィルタの端面において，帯体をロウ材で接合する状態を示し，（Ａ）はフィルタの通路断面積に比例した数の箇所で接合した状態を示し，（Ｂ）はフィルタの中心部から外周部へ延びる接合部を分断した状態を示し，（Ｃ）はフィルタの中心部から外周部へ延びる接合部の接合面を増大させた状態を示す説明図である。In the end face of the filter, the state where the strip is joined with the brazing material is shown, (A) shows the state where the strips are joined at the number of places proportional to the passage cross-sectional area of the filter, and (B) shows the outer periphery from the center of the filter. (C) is explanatory drawing which shows the state which increased the joint surface of the junction part extended from the center part of a filter to an outer peripheral part.

１，１Ａ，１Ｂ担体
２ケース
３波板状帯体
４柱状体
５ハニカム通路
６溝
７稜線
８帯体
９流入口
１０流出口
１１係止部材
１２凹部
１３平板状帯体
１４ストレートガス通路
１５ジグザグガス通路
１６屈折路
１７平行路
１８粒子状物質（ＰＭ）
１９排気ガス通路
２０，２０Ａ，２０Ｂ，２０Ｃ，２０Ｄフィルタ
３０還元剤供給手段 1, 1A, 1B Carrier 2 Case 3 Corrugated plate 4 Columnar 5 Honeycomb passage 6 Groove 7 Ridge 8 Strip 9 Inlet 10 Outlet 11 Locking member 12 Recess 13 Flat plate 14 Straight gas passage 15 Zigzag Gas passage 16 Refraction path 17 Parallel path 18 Particulate matter (PM)
19 Exhaust gas passage 20, 20A, 20B, 20C, 20D Filter 30 Reducing agent supply means

Claims

排気ガス通路を形成するケース内に配設された担体を備えたフィルタに排気ガスを通して前記排気ガス中の粒子状物質，スート，ＮＯ_X，ＨＣ等の有害物質を燃焼や酸化・還元によって消失させて前記排気ガスを浄化する排気ガス浄化装置において，
前記担体は前記ケース内の排気ガス流れ方向に少なくとも２個直列に配設され，
前記担体の上流には還元剤を前記排気ガス通路に供給する還元剤供給手段が設けられ，前記担体は金網を少なくとも波板状に折り曲げて成形した波板状帯体を筒状に巻き上げて形成された柱状体から構成され，
上流側の前記柱状体を構成する前記担体にはＮＯ _X 還元触媒が担持され且つ下流側の前記柱状体を構成する前記担体には酸化触媒又はＮＯ _X 還元触媒が担持されており，
少なくとも前記下流側の前記柱状体には，前記金網を波板状に折り曲げて軸方向に対してジグザグな傾き状に延びる多数の稜線と前記稜線間の溝とから構成される屈折路に成形された２枚の前記波板状帯体が，前記稜線の傾き方向を互いに交差状に重ね合わせて巻き上げられて前記溝に沿って多数のジグザグガス通路でなる前記ハニカム通路が形成されていることを特徴とする排気ガス浄化装置。 The exhaust gas is passed through a filter provided with a carrier disposed in a case forming an exhaust gas passage, and harmful substances such as particulate matter, soot, NO _x , and HC in the exhaust gas are eliminated by combustion, oxidation, and reduction. In the exhaust gas purification device for purifying the exhaust gas,
At least two carriers are arranged in series in the exhaust gas flow direction in the case,
A reducing agent supplying means for supplying a reducing agent to the exhaust gas passage is provided upstream of the carrier, and the carrier is formed by winding up a corrugated belt body formed by bending a metal mesh into at least a corrugated plate shape. Made up of columnar bodies,
The support constituting the upstream columnar body carries a NO _x reduction catalyst, and the support constituting the downstream columnar body carries an oxidation catalyst or a NO _x reduction catalyst,
At least the columnar body on the downstream side is formed into a refraction path composed of a plurality of ridge lines extending in a zigzag inclination with respect to the axial direction by bending the wire mesh into a corrugated plate shape and grooves between the ridge lines. The two corrugated strips are rolled up with the ridge lines inclined in an intersecting manner so as to form the honeycomb passage including a plurality of zigzag gas passages along the groove. A featured exhaust gas purifier.

前記フィルタにおける上流側の前記柱状体を構成する前記担体に担持された前記触媒として少なくとも銀を用い，下流側の前記柱状体を構成する前記担体に担持された前記触媒として少なくとも白金を用いていることを特徴とする請求項１に記載の排気ガス浄化装置。 In the filter, at least silver is used as the catalyst supported on the carrier constituting the upstream columnar body, and at least platinum is used as the catalyst supported on the carrier constituting the downstream columnar body. The exhaust gas purification device according to claim 1, wherein

前記フィルタにおける下流側の前記柱状体を構成する前記担体は，前記稜線が前記柱状体の軸方向に傾き状に延びて前記排気ガス中の前記粒子状物質を捕集して焼却することを特徴とする請求項１又は２に記載の排気ガス浄化装置。 The carrier constituting the columnar body on the downstream side of the filter is characterized in that the ridge line extends in an inclined manner in the axial direction of the columnar body to collect and incinerate the particulate matter in the exhaust gas. The exhaust gas purifying device according to claim 1 or 2 .