JPH04103819A - Exhaust gas purification device - Google Patents
Exhaust gas purification deviceInfo
- Publication number
- JPH04103819A JPH04103819A JP2220981A JP22098190A JPH04103819A JP H04103819 A JPH04103819 A JP H04103819A JP 2220981 A JP2220981 A JP 2220981A JP 22098190 A JP22098190 A JP 22098190A JP H04103819 A JPH04103819 A JP H04103819A
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb body
- exhaust gas
- gas purification
- purification device
- corrugated
- 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
Links
- 238000000746 purification Methods 0.000 title claims abstract description 37
- 239000003054 catalyst Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 32
- 238000005452 bending Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000004804 winding Methods 0.000 abstract description 5
- 238000003475 lamination Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000006555 catalytic reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的コ
（産業上の利用分野）
本発明は、−Ｍに自動車の排気ガスの浄化手段として排
気管の途中に介装されて使用される排気ガス浄化用触媒
を担持させるための金属製ハニカム体から成る排気ガス
浄化装置に関する。[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention relates to an exhaust gas purifying device which is used by being inserted in the middle of an exhaust pipe as a means for purifying exhaust gas of an automobile. The present invention relates to an exhaust gas purification device comprising a metal honeycomb body for supporting a catalyst.
更に詳しくは、ハニカム体を構成する平板状帯材と波板
状帯材の組合せ方式を排気ガスがハニカム体内部を通過
するときの流速分布が均一化するように組合せて構成し
、ハニカム体内部の不均一流速に基づ（触媒反応の不均
一やヒートスポットを解消した排気ガス浄化装置に関す
るものである。More specifically, the combination method of the flat strip material and the corrugated strip material constituting the honeycomb body is combined so that the flow velocity distribution when the exhaust gas passes through the inside of the honeycomb body is uniform, and the inside of the honeycomb body is This relates to an exhaust gas purification device that eliminates uneven catalytic reactions and heat spots based on uneven flow velocity.
（従来の技術）
従来、この種の排気ガス浄化装置は、一般に厚さ０−０
３〜Ｏ，１ｍｍの耐熱性の薄肉鋼板の平板状帯材と前記
薄肉鋼板を波付加工した波板状帯材とを、相互に当接部
を有するように重積し、これを−枯渇巻状に巻回積層し
て製作した軸方向に排気ガス通路のための多数の網目状
通気孔路（セル）を有するハニカム状積層体（以下、巻
回状のハニカム体という。）と、前記巻回状のハニカム
体を環装し固着するための両端が開口した筒状の金属ケ
ースから構成されている。なお、該ハニカム体の壁面に
排気ガス浄化用触媒（ｐｔ、 Ｐｄ、 Ｒｈなど）が相
持されることはいうまでもないことである。(Prior Art) Conventionally, this type of exhaust gas purification device generally has a thickness of 0-0.
A flat strip of heat-resistant thin steel plate of 3 to O, 1 mm and a corrugated strip made of the thin steel plate are stacked so that they have abutting portions, and this is depleted. A honeycomb-like laminate (hereinafter referred to as a "wound honeycomb body") having a large number of mesh-like ventilation holes (cells) for exhaust gas passages in the axial direction, which is manufactured by winding and laminating the above-mentioned It consists of a cylindrical metal case with open ends for enclosing and fixing a wound honeycomb body. It goes without saying that an exhaust gas purifying catalyst (PT, Pd, Rh, etc.) is supported on the wall surface of the honeycomb body.
そして、前記した巻回タイプのへ二カム体と金属ケース
とは、排気ガス自体の高温度及び排気ガスと浄化用触媒
との発熱反応などによる熱膨張や熱的応力に耐えるよう
に、また自動車走行時の振動などに耐え得るようにろう
接などにより強固に固着される。一方、ハニカム体を構
成する平板状帯材と波板状帯材の当接部は種々の方法に
より固着される。The above-mentioned wound type henicam body and metal case are designed to withstand thermal expansion and thermal stress caused by the high temperature of the exhaust gas itself and the exothermic reaction between the exhaust gas and the purification catalyst, It is firmly fixed by soldering etc. to withstand vibrations during driving. On the other hand, the abutting portions of the flat band material and the corrugated band material constituting the honeycomb body are fixed by various methods.
しかしながら、前記した巻回状のハニカム体と金属ケー
スとから構成される排気ガス浄化装置は、排気ガスと触
媒との十分な反応という観点からみると、改善の余地を
残すものである。However, the above-described exhaust gas purification device composed of a wound honeycomb body and a metal case leaves room for improvement from the viewpoint of sufficient reaction between the exhaust gas and the catalyst.
前記した巻回状のハニカム体は、製作の容易性、ハニカ
ム体を構成する平板状帯材と波板状帯材との当接部の固
着（ろう接合）の容易性と固着強度などに優れたもので
あるが、排気系における排気ガスの流速分布の不均一（
円筒形の排気管においては、中心部が最大の流速を有す
る。）に基づき、触媒反応が不均一なものとなり、該触
媒反応の不均一に起因してハニカム体内部のヒートスポ
ット（ハニカム体中心部の局所的高温化）の発生、並び
に熱応力歪の局部的発生などが生起する。The above-described wound honeycomb body is easy to manufacture, and has excellent fixing strength and ease of fixing (brazing) the abutting portions of the flat strip material and the corrugated strip material constituting the honeycomb body. However, the uneven flow velocity distribution of exhaust gas in the exhaust system (
In a cylindrical exhaust pipe, the center has the maximum flow velocity. ), the catalytic reaction becomes non-uniform, and due to the non-uniform catalytic reaction, heat spots (local high temperature in the center of the honeycomb body) occur inside the honeycomb body, as well as local thermal stress distortion. Occurrence, etc. occur.
（発明が解決しようとする課題）
本発明者らは、前記した巻回状のハニカム体の欠点を解
消すべ（鋭意、検討を重ねた。その結果、排気ガス浄化
装置に適用される金属製ハニカム体としで、単一構造と
するのでなく、巻回状ハニカム体の前段に、排気ガスの
流速分布をより均一化する点で優れている放射状、伸開
状、Ｓ字状のハニカム体を配設することで、巻回状ハニ
カム体部位での排気ガスと担持触媒との接触反応をより
均一化できることを見い出し、本発明を完成するに至っ
た。(Problems to be Solved by the Invention) The present inventors have made extensive studies to eliminate the drawbacks of the wound honeycomb body described above. As a result, the metal honeycomb body applied to the exhaust gas purification device Instead of using a single structure, a radial, expanded, or S-shaped honeycomb body, which is superior in terms of making the flow velocity distribution of exhaust gas more uniform, is placed in front of the wound honeycomb body. The inventors have discovered that the contact reaction between the exhaust gas and the supported catalyst at the wound honeycomb body portion can be made more uniform by providing the above structure, and have completed the present invention.
［発明の構成］
（課題を解決するための手段）
本発明を概説すれば、本発明は、排気ガス浄化用触媒を
担持するための平板状帯材と波板状帯材で形成されるハ
ニカム体を有する排気ガス浄化装置において、
前記ハニカム体が、排気ガスの流れ方向にみて、
（ｉ）前段部が放射状、伸開線状、または８字のもので
構成され、かつ、
（ｉｉ）後段部が巻回状のもので構成されるものである
、
ことを特徴とする排気ガス浄化装置に関するものである
。[Structure of the Invention] (Means for Solving the Problems) To summarize the present invention, the present invention provides a honeycomb formed of a flat strip material and a corrugated strip material for supporting an exhaust gas purifying catalyst. In the exhaust gas purification device having a body, the honeycomb body, when viewed in the flow direction of the exhaust gas, (i) has a front stage formed in a radial shape, an extended line shape, or a figure 8 shape, and (ii) a rear stage. The present invention relates to an exhaust gas purification device characterized in that a portion thereof is formed in a wound shape.
以下、本発明の構成ならびに実施態様について、図面に
基づいて更に詳しく説明する。なお、本発明は図示のも
のに限定されず、これらのものは例示と解すべきである
。Hereinafter, the configuration and embodiments of the present invention will be explained in more detail based on the drawings. Note that the present invention is not limited to what is shown in the drawings, and these things should be understood as illustrative.
本発明の排気ガス浄化装置を構成する後段のハニカム体
は、第１図に示されるように平板状帯材（１１）と波板
状帯材け２）とを重積したものを、−括して巻回積層す
ることにより製作した巻回状のハニカム体（ｌ旧である
。第１図には、前記巻回状ハニカム体（１旧が金属製ケ
ーシング（２）内に環装、固着された状態のものが示さ
れてい゛るが、特段″にケーシング（２）を使用しなく
てもよい。なお、平板状帯材（１１）と波板状帯材（１
２）を相互に当接するように配置するとき、排気ガスの
通路となる多数の網目状通気孔路け３）（セル）は自動
的に形成される。The latter-stage honeycomb body constituting the exhaust gas purification device of the present invention is made by stacking flat strips (11) and corrugated strips 2), as shown in FIG. A rolled honeycomb body (1 old) is manufactured by winding and laminating the rolled honeycomb body (1 old). Although the casing (2) is not particularly required, it is not necessary to use the flat strip (11) and the corrugated strip (11).
When 2) are arranged so as to abut each other, a large number of mesh-like vent channels 3) (cells), which serve as passages for exhaust gas, are automatically formed.
前記平板状帯材として、例えばＦｅ−Ｃｒ２Ｏ％−＋１
５％の耐熱性のステンレス鋼、あるいはこれに耐酸化性
を改善するために希土類を加えた耐熱性のステンレス鋼
などの厚さ０．０４ｍｍ、幅７５ｍｍのものが、そして
波板状帯材として前記平板状帯材を波形加工したものが
使用される。各帯材にＡ！を含有したステンレス鋼を用
いると、熱処理により帯材表面にウィスカー状のＡｌ２
２０３が析出し、これが排気ガス浄住用触媒を強固に担
持するので好ましいものである。As the flat strip material, for example, Fe-Cr2O%-+1
5% heat-resistant stainless steel, or heat-resistant stainless steel with rare earth elements added to it to improve oxidation resistance, with a thickness of 0.04 mm and a width of 75 mm, and as corrugated strip material. The flat strip material processed into a corrugated shape is used. A for each strip material! When stainless steel containing aluminum is used, whisker-like Al2 is formed on the surface of the strip by heat treatment.
203 is precipitated, which is preferable because it firmly supports the exhaust gas purifying catalyst.
例えば、前記巻回状ハニカム体（ｌ旧は、次のようにし
て製作される。For example, the wound honeycomb body is manufactured as follows.
（イ）平板状帯材 Ｃｒ２Ｏ％、Ａ！５％の耐熱鋼の厚さ０．０５ｍｍ。(a) Flat strip material Cr2O%, A! 5% heat resistant steel thickness 0.05mm.
幅７５ｍｍの金属帯材を用いた。A metal strip material with a width of 75 mm was used.
（ロ）波板状帯材
前記平板状帯材と同種の耐熱鋼から、−組のフォーミン
グギアを用いて、山と山のピッチ幅が３．５ｍｍ、山の
高さが１．８ｍｍである波形の金属帯材を製作した。(b) Corrugated strip material Made of the same type of heat-resistant steel as the flat strip material, using a - set of forming gears, the pitch width of the ridges is 3.5 mm, and the height of the ridges is 1.8 mm. We made corrugated metal strips.
前記平板状帯材と波板状帯材とを互に重積し、これを−
枯渇巻状に巻回積層して外径７０ｍｍのハニカム体を製
作した。The flat strip material and the corrugated strip material are stacked on top of each other, and then -
A honeycomb body with an outer diameter of 70 mm was manufactured by winding and laminating the material in a depleted spiral shape.
次に、本発明の最大の特徴とする前記巻回状ハニカム体
（ｌ旧の前段に配置される放射状ハニカム体ｆ２Ｈ）
、伸開線状ハニカム体（３Ｈ） 、及びＳ字状ハニカム
体（４Ｈ）について説明する。Next, the above-mentioned wound honeycomb body (radial honeycomb body f2H disposed in the previous stage of the previous stage) which is the greatest feature of the present invention.
, an expanded linear honeycomb body (3H), and an S-shaped honeycomb body (4H) will be explained.
第２図は、本発明で使用される放射状ハニカム体（２旧
の正面図である。放射状ハニカム体（２Ｈ）は、前記巻
回状ハニカム体（ＩＨ）と同種の耐熱性の薄肉鋼板を用
いて製作される。これは、第２図に示されるように中心
部ｆｃ）から、例えば中心角ａをもつように放射状に平
板状帯材１ｌｌ）を配置させ、この間に中心部から外周
部に向けて順次、波の高さが大きくなる波板状帯材（１
２）を嵌挿し、固定するようにして製作すればよい。Fig. 2 is a front view of the radial honeycomb body (2H) used in the present invention.The radial honeycomb body (2H) is made of the same type of heat-resistant thin steel plate as the wound honeycomb body (IH). As shown in Fig. 2, flat strips 1ll) are arranged radially from the center fc) so as to have, for example, a central angle a. Corrugated sheet material (1
2) can be manufactured by inserting and fixing.
第３図は、本発明で使用される伸開線状ハニカム体（３
旧の正面図である。伸開状ハニカム体（３Ｈ）も、前記
巻回状ハニカム体（１旧と同種の耐熱性の薄肉鋼板を用
いて製作される。これは、第３図に示されるように中心
部（Ｃ１から伸開線が延びるように平板状帯材（１１）
と波板状帯材（１２）とからなるエレメントｆＥｌの所
望の個数を伸開させるようにして製作される。Figure 3 shows the expanded linear honeycomb body (3) used in the present invention.
It is an old front view. The expanded honeycomb body (3H) is also manufactured using the same kind of heat-resistant thin steel plate as the wound honeycomb body (1 old). Flat strip material (11) so that the stretch line extends
It is manufactured by expanding and opening a desired number of elements fEl consisting of a corrugated strip material (12) and a corrugated strip material (12).
第４図は、本発明で使用されるＳ字状ハニカム体（４旧
の正面図である。Ｓ字状ハニカム体（４Ｈ）も、前記巻
回状ハニカム体（１旧と同種の耐熱性の薄肉鋼板を用い
て製作される。例えば、平板状帯材（１１）と波板状帯
材（１２）を交互に階層状に積層したものを、該積層体
の上下両面上に設定した二つの固定点（３，４）を中心
にして、平板状帯材と波板状帯材とからなるエレメント
ｆＥｌの夫々が、該二つの固定点（３，４）を中心に逆
向き方向になるように折曲加工して製作される。Fig. 4 is a front view of the S-shaped honeycomb body (4H) used in the present invention. For example, flat strips (11) and corrugated strips (12) are stacked alternately in a layered manner. With the fixed points (3, 4) as the center, each of the elements fEl consisting of the flat strip material and the corrugated strip material is oriented in opposite directions about the two fixed points (3, 4). It is manufactured by bending it.
本発明において、前記巻回状ハニカム体（ＩＨ）の前段
部に使用される前記放射状ハニカム体（２Ｈ） 、伸開
線状ハニカム体（３Ｈ］ 、及びＳ字状ハニカム体（４
旧は、その構造の形状特性から巻回状ハニカム体（１旧
より、排気ガスの流速分布を均一化する点で優れている
ものである。特に、これら特定構造のハニカム体（２Ｈ
〜４）１）において、少な（とも波板状帯材（１２）の
方にハニカム体の中心部からハニカム体の外周部に連通
ずるように、その壁面に連通孔を設ける場合、排気管系
の中心部において最大の流速を有する排気ガスがハニカ
ム体の外周部に誘導されるため、排気ガス流の流速分布
が更に改善される。In the present invention, the radial honeycomb body (2H), the expanded linear honeycomb body (3H), and the S-shaped honeycomb body (4
The old type is superior in terms of uniformizing the flow velocity distribution of exhaust gas than the old type due to the shape characteristics of its structure.
~4) In 1), if a communication hole is provided in the wall of the corrugated strip material (12) so as to communicate from the center of the honeycomb body to the outer circumference of the honeycomb body, the exhaust pipe system Since the exhaust gas having the maximum flow velocity in the center of the honeycomb body is guided to the outer periphery of the honeycomb body, the flow velocity distribution of the exhaust gas flow is further improved.
（実施例）
本発明の排気ガス浄化装置は、前段部に前記した特定構
造のハニカム体（２Ｈ〜４Ｈ）を、また、後段部に巻回
状ハニカム体けＨ）を配設して構成される。例えば、第
５図のような配設関係のもとて異種のハニカム体（２）
［、Ｉ）ｒ）を使用することにより排気ガス浄化装置ｆ
Ａ）が構成される。(Example) The exhaust gas purification device of the present invention is constructed by arranging the honeycomb bodies (2H to 4H) having the specific structure described above in the front stage and the wound honeycomb body H) in the rear stage. Ru. For example, a honeycomb body (2) with different types of arrangement as shown in Figure 5.
Exhaust gas purification device f by using [, I) r)
A) is configured.
第５図に示される排気ガス浄化装置ｆＡ）においては、
排気ガスの流れ方向にみて、前段部に放射状ハニカム体
（２Ｈ） 、後段部に巻回状ハニカム体（１■）が使用
されているが、該放射状ハニカム体（２Ｈ）にかえて、
伸開線状ハニカム体（３Ｈ）またはＳ字状ハニカム体（
４Ｈ）を用いてもよいことはいうまでもないことである
。In the exhaust gas purification device fA) shown in FIG.
When viewed in the flow direction of exhaust gas, a radial honeycomb body (2H) is used in the front stage and a wound honeycomb body (1■) is used in the rear stage, but instead of the radial honeycomb body (2H),
Expanded linear honeycomb body (3H) or S-shaped honeycomb body (
It goes without saying that 4H) may also be used.
本発明において、前記した前段部を構成する特定構造の
ハニカム体（２１（〜４１（）は巻回状ハニカム体ｆｌ
Ｈ）より製作コストが高くなること、また排気ガス流の
均一化という効果の点から、前段部のハニカム体の幅（
ｌ）は、後段部の巻回状ハニカム体（１旧の幅（Ｌ）よ
り小さいものが好ましい。たとえばρ＝Ｉ−／１０〜Ｌ
／３の幅のもので十分である。また、第５図に示される
ように、前段部ハニカム体（２Ｈ〜４１１）と後段部の
巻回状ハニカム体（ＩＨ）との間に、排気ガス流をミキ
シングするためのミキシングスペースＣ幅、Ｗ）を設け
ることにより、更にρを小さくするようにしてもよい。In the present invention, the honeycomb body (21 (- 41 () is a wound honeycomb body fl
The width of the honeycomb body in the front stage (
l) is preferably smaller than the width (L) of the wound honeycomb body (1) at the rear stage.For example, ρ=I-/10~L
A width of /3 is sufficient. Further, as shown in FIG. 5, a width of a mixing space C for mixing the exhaust gas flow between the front honeycomb body (2H to 411) and the rear winding honeycomb body (IH), W) may be provided to further reduce ρ.
［発明の効果］
本発明の排気ガス浄化装置は、排気ガスの流れ方向にみ
て、前段部を放射状、伸開線状、またはＳ字状のハニカ
ム体で構成し、後段部を巻回状ハニカム体で構成したも
のである。このように異種のハニカム体で排気ガス浄化
装置を構成することから、次のような優れた作用効果を
奏する；
（］）前段部の特定構造のハニカム体は、後段部の巻回
状ハニカム体より、排気ガス流の不均一な流速分布をよ
り均一化する。このため、排気ガス浄化装置の全体とし
て、従来の単一のハニカム体を使用したものより排気ガ
スと担持された触媒がより均一に接触反応することにな
り、高いレベルの排気ガス浄什能が確保される。[Effects of the Invention] In the exhaust gas purification device of the present invention, the front stage is composed of a radial, expanded linear, or S-shaped honeycomb body, and the rear stage is composed of a wound honeycomb body, as viewed in the flow direction of exhaust gas. It is made up of the body. Since the exhaust gas purification device is configured with different types of honeycomb bodies in this way, it has the following excellent functions and effects; This makes the uneven flow velocity distribution of the exhaust gas flow more uniform. As a result, the overall exhaust gas purification system achieves a more uniform catalytic reaction between the exhaust gas and the supported catalyst than the conventional single honeycomb structure, resulting in a high level of exhaust gas purification performance. Secured.
［ｉｉ）前記ｆｉ）の効果との関係で、従来のハニカム
中心部に局所的に発生していた大きな熱応力歪を装置全
体に分散させることができ、装置全体の耐久性を向上さ
せることができる。[ii) In relation to the effect of fi) above, the large thermal stress strain that was locally generated in the center of the conventional honeycomb can be dispersed throughout the device, and the durability of the entire device can be improved. can.
ｆｉｉｉ）前段部の特定構造のハニカム体は、前記（ｉ
ｌの排気ガス流の流速分布の均一化という機能のほかに
、プレキャタライザー（排気ガスの予備的反応器）とし
ての機能をもたせることができること、即ち排気ガス流
を後段部のメインキャタライザー（巻回ハニカム体）で
の触媒反応に最適な温度条件にコントロールする機能を
もたせることができるため、装置全体の排気ガス浄化能
を向上させることができる。例えば、プレキャタライザ
ー側の触媒担持壁に、後段部のメインキャタライザより
単位面積当り、多くの触媒量を担持させることにより、
前記した効果を得ることができる。fiii) The honeycomb body with the specific structure of the front stage part has the above-mentioned (i)
In addition to the function of uniformizing the flow velocity distribution of the exhaust gas flow, it can also function as a pre-catalyzer (exhaust gas preliminary reactor). Since it is possible to control the optimal temperature conditions for the catalytic reaction in the honeycomb body, the exhaust gas purification ability of the entire device can be improved. For example, by allowing the catalyst supporting wall on the pre-catalyzer side to support a larger amount of catalyst per unit area than the main catalytic converter in the rear stage,
The effects described above can be obtained.
第１図は、本発明の排気ガス浄化装置の後段部に使用さ
れる巻回状ハニカム体の正面図である。
第２図は、本発明の排気ガス浄化装置の前段部に使用さ
れる放射状ハニカム体の概略正面図である。
第３図は、本発明の排気ガス浄化装置の前段部に使用さ
れる伸開状ハニカム体の概略正面図である。
第４図は、本発明の排気ガス浄化装置の前段部に使用さ
れるＳ字状ハニカム体の概略正面図である。
第５図は、本発明の排気ガス浄化装置の軸方向断面図で
ある。
Ａ・・・排気ガス浄化装置
ＩＨ，２Ｈ，３Ｈ，４Ｈ・−・ハニカム体１１・・・平
板状帯材
１２−・・波板状帯材
１３・・・網目状通気孔路FIG. 1 is a front view of a wound honeycomb body used in the latter part of the exhaust gas purification device of the present invention. FIG. 2 is a schematic front view of a radial honeycomb body used in the front stage of the exhaust gas purification device of the present invention. FIG. 3 is a schematic front view of an expanded honeycomb body used in the front stage of the exhaust gas purification device of the present invention. FIG. 4 is a schematic front view of an S-shaped honeycomb body used in the front stage of the exhaust gas purification device of the present invention. FIG. 5 is an axial cross-sectional view of the exhaust gas purification device of the present invention. A...Exhaust gas purification device IH, 2H, 3H, 4H...Honeycomb body 11...Flat strip material 12...Corrugated strip material 13...Mesh ventilation hole path
Claims (7)
波板状帯材で形成されるハニカム体を有する排気ガス浄
化装置において、 前記ハニカム体が、排気ガスの流れ方向にみて、 （ｉ）前段部が放射状、伸開線状、またはＳ字状のもの
で構成され、かつ、 （ｉｉ）後段部が巻回状のもので構成されるものである
、 ことを特徴とする排気ガス浄化装置。1. In an exhaust gas purification device having a honeycomb body formed of a flat strip material and a corrugated strip material for supporting an exhaust gas purification catalyst, the honeycomb body has (i) An exhaust gas purification device characterized in that: (i) the front stage part is composed of a radial, stretched linear, or S-shaped part, and (ii) the rear stage part is composed of a coiled part. .
は所定の距離をおいて配置されるものである請求項第１
項に記載の排気ガス浄化装置。2. Claim 1, wherein the front honeycomb body and the rear honeycomb body are arranged in close contact with each other or at a predetermined distance apart.
Exhaust gas purification device as described in section.
同等またはそれ以下のものである請求項第１項に記載の
排気ガス浄化装置。3. 2. The exhaust gas purification device according to claim 1, wherein the width of the front honeycomb body is equal to or less than the width of the rear honeycomb body.
の幅（Ｌ）に対し、ｌ＝Ｌ／１０〜Ｌ／３の関係にある
ものである請求項第３項に記載の排気ガス浄化装置。4. The exhaust gas purification according to claim 3, wherein the width (l) of the front honeycomb body has a relationship of l=L/10 to L/3 with respect to the width (L) of the rear honeycomb body. Device.
射状に配置された平板状帯材の間に、波形形状が中心部
から外周部に向けて順次大となる波板状帯材を固定した
放射状のものである請求項第１項に記載の排気ガス浄化
装置。5. The honeycomb body at the front stage is a radial structure in which corrugated strips with waveforms that gradually increase in size from the center to the outer periphery are fixed between flat strips arranged radially from the center of the honeycomb body. The exhaust gas purification device according to claim 1, which is an exhaust gas purification device.
からなる浄化エレメントの所望の数をハニカム体の中心
部から伸開線状に外側に伸開させた伸開状のものである
請求項第１項に記載の排気ガス浄化装置。6. The honeycomb body in the front stage is an expanded type in which a desired number of purifying elements made of flat strips and corrugated strips are extended outward in an expanding line from the center of the honeycomb body. An exhaust gas purification device according to claim 1.
を交互に重積した積層体を、該積層体の表面に設定され
た少なくとも二つの固定点を中心に反対向きに折曲加工
して平板状帯材と波板状帯材がＳ字状になるように折曲
加工されたＳ字状のものである請求項第１項に記載の排
気ガス浄化装置。7. The honeycomb body in the front section bends a laminate in which flat strips and corrugated strips are alternately stacked in opposite directions around at least two fixing points set on the surface of the laminate. 2. The exhaust gas purification device according to claim 1, wherein the exhaust gas purification device is formed into an S-shape obtained by processing and bending the flat plate-like band material and the corrugated band material into an S-shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2220981A JPH04103819A (en) | 1990-08-24 | 1990-08-24 | Exhaust gas purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2220981A JPH04103819A (en) | 1990-08-24 | 1990-08-24 | Exhaust gas purification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04103819A true JPH04103819A (en) | 1992-04-06 |
Family
ID=16759601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2220981A Pending JPH04103819A (en) | 1990-08-24 | 1990-08-24 | Exhaust gas purification device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04103819A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08504361A (en) * | 1992-12-09 | 1996-05-14 | エミテツク ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Catalytic converter having two or more honeycomb bodies in a jacket tube and method for manufacturing the same |
| WO1996016735A1 (en) * | 1994-12-02 | 1996-06-06 | Usui Kokusai Sangyo Kaisha, Ltd. | Metal honeycomb body |
| US7111393B2 (en) * | 2001-03-16 | 2006-09-26 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Process for producing a metallic honeycomb body with a receptacle for a sensor |
| JP2009507622A (en) * | 2005-09-09 | 2009-02-26 | エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Method for manufacturing annular honeycomb body and annular honeycomb body |
| JP2010214304A (en) * | 2009-03-17 | 2010-09-30 | Cataler Corp | Metal carrier for exhaust gas cleaning catalyst |
-
1990
- 1990-08-24 JP JP2220981A patent/JPH04103819A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08504361A (en) * | 1992-12-09 | 1996-05-14 | エミテツク ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Catalytic converter having two or more honeycomb bodies in a jacket tube and method for manufacturing the same |
| WO1996016735A1 (en) * | 1994-12-02 | 1996-06-06 | Usui Kokusai Sangyo Kaisha, Ltd. | Metal honeycomb body |
| GB2310385A (en) * | 1994-12-02 | 1997-08-27 | Usui Kokusai Sangyo Kk | Metal honeycomb body |
| GB2310385B (en) * | 1994-12-02 | 1998-12-09 | Usui Kokusai Sangyo Kk | Metal honeycomb core body |
| US5853902A (en) * | 1994-12-02 | 1998-12-29 | Usui Kokusai Sangyo Kaisha, Ltd. | Metal honeycomb core body |
| US7111393B2 (en) * | 2001-03-16 | 2006-09-26 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Process for producing a metallic honeycomb body with a receptacle for a sensor |
| JP2009507622A (en) * | 2005-09-09 | 2009-02-26 | エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Method for manufacturing annular honeycomb body and annular honeycomb body |
| US8075978B2 (en) | 2005-09-09 | 2011-12-13 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Method for producing an annular honeycomb body, and annular honeycomb body |
| JP2010214304A (en) * | 2009-03-17 | 2010-09-30 | Cataler Corp | Metal carrier for exhaust gas cleaning catalyst |
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