JP2002295226A - Particulate cleaner for diesel exhaust gas - Google Patents
Particulate cleaner for diesel exhaust gasInfo
- Publication number
- JP2002295226A JP2002295226A JP2001100026A JP2001100026A JP2002295226A JP 2002295226 A JP2002295226 A JP 2002295226A JP 2001100026 A JP2001100026 A JP 2001100026A JP 2001100026 A JP2001100026 A JP 2001100026A JP 2002295226 A JP2002295226 A JP 2002295226A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- heat
- resistant fiber
- diesel exhaust
- diesel
- 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
- 239000012210 heat-resistant fiber Substances 0.000 claims abstract description 33
- 239000013618 particulate matter Substances 0.000 claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims abstract description 16
- 239000000919 ceramic Substances 0.000 claims abstract description 16
- 230000003647 oxidation Effects 0.000 claims abstract description 10
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 10
- 210000003437 trachea Anatomy 0.000 claims description 24
- 239000000835 fiber Substances 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 11
- 238000000746 purification Methods 0.000 claims description 7
- 229910052878 cordierite Inorganic materials 0.000 claims description 6
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims description 6
- -1 iron-chromium-aluminum Chemical compound 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000006262 metallic foam Substances 0.000 claims description 2
- 229910052863 mullite Inorganic materials 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 5
- 101000650817 Homo sapiens Semaphorin-4D Proteins 0.000 description 3
- 102100027744 Semaphorin-4D Human genes 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910018557 Si O Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910003446 platinum oxide Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910018516 Al—O Inorganic materials 0.000 description 1
- 101100325793 Arabidopsis thaliana BCA2 gene Proteins 0.000 description 1
- 102100022626 Glutamate receptor ionotropic, NMDA 2D Human genes 0.000 description 1
- 101000972840 Homo sapiens Glutamate receptor ionotropic, NMDA 2D Proteins 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Materials (AREA)
- Catalysts (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明は、ディーゼル排気ガ
ス粒子浄化装置に関し、 更に詳細には、ディーゼルエン
ジンの排気ガスに含まれる粒子状物質を排気ガスから除
去する浄化装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for purifying diesel exhaust gas particles, and more particularly to a device for removing particulate matter contained in exhaust gas of a diesel engine from exhaust gas.
【０００２】[0002]
【従来の技術】ディーゼルエンジンから排出される粒子
状物質（ＰＭ) は、健康を害するという疫学上の症例が
あり、 排出量の規制が厳しくなっている。この粒子状物
質を浄化する装置として、 多孔性セラミックスを用いた
ディーゼル排気ガス浄化装置(ＤＰＦ) が各国で長年研
究開発されている。2. Description of the Related Art There are epidemiological cases in which particulate matter (PM) emitted from a diesel engine is harmful to health, and the amount of emission is stricter. As a device for purifying this particulate matter, a diesel exhaust gas purifier (DPF) using porous ceramics has been researched and developed in many countries for many years.
【０００３】このＤＰＦは、排気ガスが多孔性セラミッ
クスをフィルターとして作用させて粒子状物質を捕集さ
せるものであるから、捕集された粒子状物質による目詰
まりを除去するため、 捕集された粒子状物質を燃焼させ
てフィルター機能を再生させる必要がある。[0003] In this DPF, since the exhaust gas causes the porous ceramics to act as a filter to collect particulate matter, the DPF is collected to remove clogging due to the collected particulate matter. It is necessary to regenerate the filter function by burning the particulate matter.
【０００４】[0004]
【発明が解決しようとする課題】ところでＤＰＦは、前
記燃焼に対する耐熱性に問題があり、このままでは実用
化が難しかった。近年、高耐熱性の炭化ケイ素繊維を用
い高耐久性のフィルターが開発されたが、素材が高価で
あることの他に、加工コストが高額となるため、広く採
用されるに至っていない。However, DPF has a problem in heat resistance against the combustion, and it has been difficult to put it to practical use as it is. In recent years, highly durable filters have been developed using silicon carbide fibers having high heat resistance, but they have not been widely adopted because of their expensive materials and high processing costs.
【０００５】また、ＤＰＦを低コストとするために多孔
性セラミックスに酸化触媒を担持させ、粒子状物質の捕
集と、フィルター機能再生させることを連続的に行なわ
せる提案がなされている。しかしながらこの方法は、 燃
料中に硫黄分が多い場合には触媒が被毒し、生成した硫
黄化合物がフィルターの気孔部分を塞ぐという問題があ
る。また低硫黄分の場合でも、燃焼によるフィルター部
分が熔損するという問題が残る。[0005] Further, in order to reduce the cost of the DPF, it has been proposed to carry an oxidation catalyst on porous ceramics and to continuously collect particulate matter and regenerate a filter function. However, this method has a problem that when the fuel contains a large amount of sulfur, the catalyst is poisoned, and the generated sulfur compound blocks the pores of the filter. Further, even in the case of a low sulfur content, there remains a problem that the filter portion is damaged by combustion.
【０００６】本発明は、以上の問題に着目してなされた
ものであり、 多孔性セラミックス製ハニカム構造体およ
び炭化ケイ素のような耐熱性繊維それぞれの特徴を生か
して粒子状物質を除去できるディーゼル排気ガス粒子浄
化装置を提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in consideration of the above-described problems. A diesel exhaust system capable of removing particulate matter by utilizing the characteristics of a porous ceramic honeycomb structure and a heat-resistant fiber such as silicon carbide. It is intended to provide a gas particle purification device.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
の本発明のディーゼル排気ガス粒子浄化装置は、セラミ
ックス多孔体から成るハニカム構造体によって形成され
る筒状気管の開口を、それぞれ隣接する筒状気管と反対
側を封止したいわゆるウオールフロータイプに形成し、
前記筒状気管内に耐熱性繊維を充填し、ディーゼルエン
ジンの排気ガスが、前記一方の開口から前記筒状気管内
に流入し、ハニカム壁を通って隣接する前記筒状気管の
開口から反対方向に流出するように形成し、前記耐熱性
繊維の繊維径を、前記流入側より流出側を細くし、前記
ハニカム壁及び耐熱性繊維に前記排気ガス中の粒子状物
質を燃焼させる酸化触媒を担持させたものである。In order to achieve the above object, a diesel exhaust gas purifying apparatus according to the present invention is characterized in that an opening of a cylindrical trachea formed by a honeycomb structure made of a porous ceramic body is formed by adjoining an opening of an adjacent cylinder. Formed into a so-called wall flow type that seals the opposite side
The tubular trachea is filled with heat-resistant fibers, and the exhaust gas of a diesel engine flows into the tubular trachea from the one opening and passes through the honeycomb wall in an opposite direction from the opening of the adjacent tubular trachea. Formed on the honeycomb wall, the diameter of the heat-resistant fiber is reduced from the inflow side to the outflow side, and the honeycomb wall and the heat-resistant fiber carry an oxidation catalyst for burning particulate matter in the exhaust gas. It was made.
【０００８】前記耐熱性繊維は、好ましくは流入側の太
い繊維径を１１〜１８マイクロメートルとし、流出側の
細い繊維径を６〜１０マイクロメートルとすることがで
きる。前記流入側の繊維径が１８マイクロメートルを超
えると粒子状物質の捕捉能力が低下し、流出側の繊維径
が６マイクロメートル未満となると健康被害が予想され
る。The heat-resistant fiber preferably has a thick fiber diameter on the inflow side of 11 to 18 micrometers and a thin fiber diameter on the outflow side of 6 to 10 micrometers. If the fiber diameter on the inflow side exceeds 18 micrometers, the ability to capture particulate matter is reduced, and if the fiber diameter on the outflow side is less than 6 micrometers, health hazards are expected.
【０００９】前記セラミックスには特に限定は無いが、
例えばコーディエライト、炭化ケイ素などを使用するこ
とができる。The ceramic is not particularly limited,
For example, cordierite, silicon carbide and the like can be used.
【００１０】前記耐熱性繊維には特に限定は無いが、例
えばＳｉ−Ｃ−Ｏを主成分とする炭化ケイ素系、Ｓｉ−
Ｏ−Ｎを主成分とする窒素化ケイ素系、Ａｌ−Ｓｉ−Ｏ
を主成分とするムライト系、Ａｌ−Ｏを主成分とするア
ルミナ系およびＳｉ−Ｏを主成分とするシリカ系などの
セラミックス、鉄−クロム−アルミニウム系金属線など
を使用することができる。The heat-resistant fiber is not particularly limited. For example, a silicon carbide-based material containing Si-CO as a main component, Si-
Al-Si-O, silicon nitride based on ON
Ceramics such as a mullite-based material containing Al as a main component, an alumina-based material containing Al-O as a main component, and a silica-based material containing Si-O as a main component, and an iron-chromium-aluminum-based metal wire.
【００１１】前記ハニカム構造体の排気ガス入口および
排気ガス出口には、開口部から充填した耐熱性繊維が脱
落しないように、多孔体、例えば鉄−クロム−アルミニ
ウム系耐熱金網、ニッケル−クロム−アルミニウム系金
属発砲体、多孔性コーディエライトなどを使用すること
ができる。At the exhaust gas inlet and the exhaust gas outlet of the honeycomb structure, a porous body such as an iron-chromium-aluminum-based heat-resistant wire mesh, nickel-chromium-aluminum is used so that the heat-resistant fiber filled from the opening does not fall off. A systemic metal foam, porous cordierite, or the like can be used.
【００１２】前記酸化触媒には特に限定はないが、 例え
ば白金等の白金族および酸化マグネシウム混合物などの
卑金属酸化物を使用することができる。なお、ハニカム
構造体および耐熱性繊維上に前記触媒を担持させるに
は、 まず触媒保持層上にアルミナ層を形成し、その上に
触媒層を形成することができる。The oxidation catalyst is not particularly limited, but a base metal oxide such as a mixture of a platinum group such as platinum and magnesium oxide can be used. In order to carry the catalyst on the honeycomb structure and the heat-resistant fiber, first, an alumina layer is formed on a catalyst holding layer, and a catalyst layer can be formed thereon.
【００１３】[0013]
【発明の実施の形態】以下添付の図面を参照した一実施
の形態により本発明を具体的に説明する.図１〜３に示
すディーゼル排気ガス粒子浄化装置１は、ディーゼルエ
ンジン２の排気マニホルド３とマフラ（図示せず）との
間の排気管４に介装して使用するものであり、ディーゼ
ル排気ガス粒子浄化装置１は、図２に示すように例えば
コーディエライトを平均気孔径４０マイクロメートルの
多孔体に焼成してハニカム構造（本体５）とし、ハニカ
ム構造を構成する複数の筒状気管６の一方の開口を、隣
接する筒状気管６同士で互い違いになるようにセラミッ
ク材７で封止した、いわゆるウオールフロータイプと
し、筒状気管６のハニカム壁から成るフィルター部８に
酸化触媒（図示せず）を担持させたものである。本実施
の形態に使用した酸化触媒は白金と酸化マグネシウム混
合物を使用した。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to an embodiment with reference to the accompanying drawings. As shown in FIG. 2, the diesel exhaust gas particle purifying apparatus 1 uses, for example, cordierite having an average pore diameter of 40 μm, as shown in FIG. The honeycomb structure (body 5) is fired into a porous body having a diameter of one meter, and one opening of a plurality of tubular trachea 6 constituting the honeycomb structure is made of a ceramic material 7 so that adjacent tubular trachea 6 are alternately arranged. It is a sealed, so-called wall flow type, in which an oxidation catalyst (not shown) is supported on a filter portion 8 composed of a honeycomb wall of a tubular trachea 6. As the oxidation catalyst used in the present embodiment, a mixture of platinum and magnesium oxide was used.
【００１４】排気ガスが本体５に流入するＡ部に開口す
る筒状気管６-1内に繊維径１４マイクロメートルの耐熱
性繊維10-1（図３）を充填し、また排気ガスが本体5 か
ら流出するＢ側に開口する筒状気管６-2内に繊維径９マ
イクロメートルの耐熱性繊維10-2（図３）を充填した。
なを、以下枝番を付した部材を総称するときは枝番を記
載しない。A heat-resistant fiber 10-1 having a fiber diameter of 14 micrometers (FIG. 3) is filled in a tubular trachea 6-1 opening at a portion A where the exhaust gas flows into the main body 5, and the exhaust gas is supplied to the main body 5. A heat-resistant fiber 10-2 having a fiber diameter of 9 micrometers (FIG. 3) was filled in a tubular trachea 6-2 which opens to the side B flowing out of the tube.
In the following, when the members with the branch numbers are collectively referred to, the branch numbers are not described.
【００１５】耐熱性繊維10は、前記充填前に前記セラミ
ックスに使用したものと同様の酸化触媒( 図示せず) を
担持させた。これらの耐熱性繊維10を筒状気管６内に充
填するには、反対側の筒状気管６の開口から吸引するこ
とにより容易に行なうことができる。The heat-resistant fiber 10 carried an oxidation catalyst (not shown) similar to that used for the ceramics before the filling. The filling of the heat-resistant fiber 10 into the tubular trachea 6 can be easily performed by sucking the fiber through the opening of the tubular trachea 6 on the opposite side.
【００１６】また本体５の排気ガス入口側および出口側
を、筒状気管６内に充填した耐熱性繊維10の繊維長さよ
り小さい網目を持つ耐熱性金網11で塞ぎ、断熱材12によ
る断熱構造としたケーシング13（図２）内に取り付け排
気ガス浄化用フィルターとしたものである。Further, the exhaust gas inlet and outlet sides of the main body 5 are closed with a heat-resistant wire mesh 11 having a mesh smaller than the fiber length of the heat-resistant fiber 10 filled in the tubular trachea 6, and a heat insulating structure with a heat insulating material 12. The exhaust gas purifying filter is mounted in the casing 13 (FIG. 2).
【００１７】図１、2 に示す上流側圧力センサ14-1およ
び下流側圧力センサ14-2は以下に示す耐久試験におい
て、前記Ａ部とＢ部との圧力損失を算出するために使用
した。なお、図１に示す符合５は制御装置、16は回転セ
ンサ、17は発電機をそれぞれ表す。The upstream pressure sensor 14-1 and the downstream pressure sensor 14-2 shown in FIGS. 1 and 2 were used for calculating the pressure loss between the A portion and the B portion in the following durability test. In FIG. 1, reference numeral 5 denotes a control device, 16 denotes a rotation sensor, and 17 denotes a generator.
【００１８】以上のように形成した本実施の形態のディ
ーゼル排気ガス粒子浄化装置１の動作を次に説明する。
図３において、前記Ａ部から流入する粒子状物質を含む
排気ガス( 矢印により表示) は、耐熱性繊維10-1を充填
した筒状気管６-1内に流入し、該繊維充填層を通過する
間に粒子状物質（図示せず）が同繊維に捕捉され、次い
で本体５のフィルター部８により更に粒子状物質が捕捉
されると共に、耐熱性繊維10-2を充填した筒状気管６-2
内に流入し、残存する粒子状物質（図示せず）が更に同
繊維10-2に捕捉され、浄化された排気ガスは下流側Ｂ部
からマフラ（図示せず）側に流出する。The operation of the diesel exhaust gas purifying apparatus 1 according to the present embodiment formed as described above will be described below.
In FIG. 3, the exhaust gas containing particulate matter (indicated by an arrow) flowing from the part A flows into the tubular trachea 6-1 filled with the heat-resistant fiber 10-1, and passes through the fiber-filled layer. During this process, the particulate matter (not shown) is captured by the same fiber, and then the particulate matter is further captured by the filter portion 8 of the main body 5 and the tubular trachea 6-filled with the heat-resistant fiber 10-2. Two
The remaining particulate matter (not shown) is further captured by the fiber 10-2, and the purified exhaust gas flows out of the downstream B portion toward the muffler (not shown).
【００１９】排気ガス温度が触媒を活性化温度以上であ
れば、捕集された微粒子状物質は酸化触媒により酸化さ
れ、炭酸ガス、 水などに変換・除去されるので、フィル
ター部８および耐熱性繊維10充填層から成る排気ガス浄
化用フィルターを再生することができる。If the temperature of the exhaust gas is equal to or higher than the activation temperature of the catalyst, the collected particulate matter is oxidized by the oxidation catalyst and converted and removed into carbon dioxide gas, water and the like. It is possible to regenerate the exhaust gas purifying filter composed of the fiber 10 packed bed.
【００２０】以上のディーゼル排気ガス粒子浄化装置１
と、耐熱性繊維10の充填を行なわない外は本実施の形態
と同様に形成し、前記と同様の触媒を担持させたコーデ
ィエライトフィルター（以下比較例という：図示せず）
とを用いてディーゼル１３モードでベンチ試験を行なっ
た。フィルターの耐久性はその結果を表１に示す。The above-described diesel exhaust gas particle purifying apparatus 1
And a cordierite filter formed in the same manner as in the present embodiment except that the heat-resistant fiber 10 is not filled, and carrying the same catalyst as described above (hereinafter referred to as a comparative example: not shown)
And a bench test was conducted in diesel 13 mode. Table 1 shows the results of the durability of the filter.
【００２１】[0021]
【表１】 表１の結果から理解されるように、本実施の形態のディ
ーゼル排気ガス粒子浄化装置１は、比較例に対してＰＭ
除去効率を向上させながら、セラミックフィルターの寿
命を飛躍的に改善できた。[Table 1] As understood from the results in Table 1, the diesel exhaust gas particle purifying apparatus 1 of the present embodiment has a PM
The service life of the ceramic filter was dramatically improved while improving the removal efficiency.
【００２２】[0022]
【発明の効果】以上説明したように本発明のディーゼル
排気ガス粒子浄化装置は、ウオールフロータイプの多孔
性セラミックス製ハニカム構造体の筒状気管内に、排気
ガス流入側には流出側より太い耐熱性繊維を充填し、多
孔性セラミックスおよび耐熱繊維のいずれにも酸化触媒
を担持させるようにしたので、次の効果を奏することが
できる。As described above, the diesel exhaust gas particle purifying apparatus of the present invention has a heat resistance that is larger on the exhaust gas inflow side than on the outflow side in the tubular trachea of the wall-flow type porous ceramic honeycomb structure. Since the porous fiber and the heat-resistant fiber are filled with the conductive fiber to support the oxidation catalyst, the following effects can be obtained.
【００２３】即ち、ハニカム構造体と耐熱性繊維との粒
子状物質の除去作用が相俟って粒子状物質の除去効率を
向上させながら、ハニカム構造体により形成された筒状
気管のハニカム壁に損傷が生じても充填された耐熱性繊
維によって粒子状物質を捕集できるようになり、多孔性
セラミック製ハニカム構造体の寿命を従来より飛躍的に
向上させることができた。That is, while the particulate matter removing action of the honeycomb structure and the heat-resistant fiber is combined to improve the particulate matter removal efficiency, the honeycomb wall is formed on the honeycomb wall of the tubular trachea formed by the honeycomb structure. Even if damage occurs, particulate matter can be collected by the filled heat-resistant fiber, and the life of the honeycomb structure made of porous ceramics can be significantly improved.
【図１】本発明の一実施の形態によるディーゼル排気ガ
ス粒子浄化装置をディーゼルエンジンの排気ガス通路に
取り付けた様子を示す図である。FIG. 1 is a diagram showing a state in which a diesel exhaust gas particle purification device according to an embodiment of the present invention is attached to an exhaust gas passage of a diesel engine.
【図２】図１の要部拡大断面図である。Figure 2 is an enlarged sectional view of FIG.
【図３】図２の要部詳細構造を説明するための拡大図で
ある。FIG. 3 is an enlarged view for explaining a detailed structure of a main part of FIG. 2;
１ ディーゼル排気ガス粒子浄化装置 ２ ディーゼルエンジン ５ 本体 ６ 筒状気管 ６-1 筒状気管（排気ガス流入側） ６-2 筒状気管（排気ガス出口側） ８ フィルター部（ハニカム壁） 10 耐熱繊維 10-1 耐熱性繊維 10-2 耐熱性繊維 11 多孔体層（金網） DESCRIPTION OF SYMBOLS 1 Diesel exhaust gas particle purification apparatus 2 Diesel engine 5 Main body 6 Cylindrical trachea 6-1 Cylindrical trachea (exhaust gas inflow side) 6-2 Cylindrical trachea (exhaust gas outlet side) 8 Filter section (honeycomb wall) 10 Heat resistant fiber 10-1 Heat resistant fiber 10-2 Heat resistant fiber 11 Porous layer (wire mesh)
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０１Ｄ 39/20 Ｂ０１Ｄ 39/20 Ｄ ４Ｌ０３１ Ａ 53/86 ＺＡＢ Ｂ０１Ｊ 23/42 Ａ 53/94 35/04 ３０１Ｈ Ｂ０１Ｊ 23/42 ３０１Ｅ 35/04 ３０１ 35/06 Ｆ Ｂ０１Ｄ 46/00 ３０２ 35/06 46/42 Ｂ Ｄ０６Ｍ 11/44 53/36 ＺＡＢ 11/83 １０３Ｂ // Ｂ０１Ｄ 46/00 ３０２ Ｄ０６Ｍ 11/00 Ａ 46/42 11/12 Ｆターム(参考） 3G090 AA02 AA03 4D019 AA01 BA02 BA05 BB13 BB18 BC07 BD06 CA01 CB01 DA03 4D048 AA14 AB01 BA01X BA03Y BA06Y BA10X BA12X BA30X BA39Y BA41X BA45Y BA46Y BB02 BB08 BB14 BB17 BB18 CC38 4D058 JA32 JB03 JB06 JB25 KA01 KA16 KA23 KA25 MA44 SA08 4G069 AA03 BA01A BA02A BA06A BA06B BA13A BA13B BA18 BB02A BB02B BB11A BB15A BC75A BC75B BD05A CA02 CA03 CA07 CA18 EA03X EA03Y EA09 EA19 EA27 EA28 EB11 EB14X EB14Y ED06 4L031 AA25 AA29 AB01 BA04 BA09──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference) B01D 39/20 B01D 39/20 D 4L031 A 53/86 ZAB B01J 23/42 A 53/94 35/04 301H B01J 23/42 301E 35/04 301 35/06 F B01D 46/00 302 35/06 46/42 B D06M 11/44 53/36 ZAB 11/83 103B // B01D 46/00 302 D06M 11/00 A 46 / 42 11/12 F-term (reference) 3G090 AA02 AA03 4D019 AA01 BA02 BA05 BB13 BB18 BC07 BD06 CA01 CB01 DA03 4D048 AA14 AB01 BA01X BA03Y BA06Y BA10X BA12X BA30X BA39Y BA41X BA45Y BA46Y BB02 J17 BB18 BB08 BB18 BB08 BB08 BB08 BB08 KA23 KA25 MA44 SA08 4G069 AA03 BA01A BA02A BA06A BA06B BA13A BA13B BA18 BB02A BB02B BB11A BB15A BC75A BC75B BD05A CA02 CA03 CA07 CA18 EA03X EA03Y EA09 EA19 E A27 EA28 EB11 EB14X EB14Y ED06 4L031 AA25 AA29 AB01 BA04 BA09
Claims (6)
造体によって形成される筒状気管の開口を、それぞれ隣
接する筒状気管と反対側を互い違いに封止し、前記筒状
気管内に耐熱性繊維を充填し、ディーゼルエンジンの排
気ガスが、前記一方の開口から前記筒状気管内に流入
し、ハニカム壁を通って隣接する前記筒状気管の開口か
ら反対方向に流出するように形成し、前記耐熱性繊維の
繊維径を、前記流入側より流出側を細くし、前記ハニカ
ム壁及び耐熱性繊維に前記排気ガス中の粒子状物質を燃
焼させる酸化触媒を担持させたことを特徴とするディー
ゼル排気ガス粒子浄化装置。An opening of a tubular trachea formed by a honeycomb structure made of a porous ceramic body is alternately sealed on the side opposite to an adjacent tubular trachea, and heat-resistant fibers are placed in the tubular trachea. Filling the exhaust gas of the diesel engine into the tubular trachea from the one opening, and flowing out of the opening of the adjacent tubular trachea through the honeycomb wall in the opposite direction through the honeycomb wall; A diesel exhaust gas characterized in that the fiber diameter of the conductive fiber is made smaller on the outflow side than on the inflow side, and the honeycomb wall and the heat-resistant fiber carry an oxidation catalyst for burning particulate matter in the exhaust gas. Particle purification device.
マイクロメートルであり、前記流出側の耐熱性繊維径が
６〜１０マイクロメートルであることを特徴とする請求
項１記載のディーゼル排気ガス粒子浄化装置。2. The heat-resistant fiber diameter on the inflow side is 11-18.
The diesel exhaust gas purifying apparatus according to claim 1, wherein the diameter of the heat-resistant fiber on the outflow side is 6 to 10 micrometers.
よび炭化ケイ素から選ばれた1 種以上であることを特徴
とする請求項１記載のディーゼル排気ガス粒子浄化装
置。3. The diesel exhaust gas purification apparatus according to claim 1, wherein the ceramic is at least one selected from cordierite and silicon carbide.
ケイ素系、ムライト系、アルミナ系およびシリカ系のセ
ラミックスならびに鉄−クロム−アルミニウム系金属線
から選ばれた1 種以上であることを特徴とする請求項１
または２記載のディーゼル排気ガス粒子浄化装置。4. The heat-resistant fiber is at least one selected from silicon carbide-based, silicon nitride-based, mullite-based, alumina-based and silica-based ceramics and iron-chromium-aluminum-based metal wires. Claim 1
Or a diesel exhaust gas particle purification apparatus according to item 2.
び排気ガス出口に多孔体を配置したことを特徴とする請
求項１、２，３または４記載のディーゼル排気ガス粒子
浄化装置。5. The diesel exhaust gas purifying apparatus according to claim 1, wherein a porous body is arranged at an exhaust gas inlet and an exhaust gas outlet of the honeycomb structure.
系耐熱金網およびニッケル−クロム−アルミニウム系金
属発砲体およびコーディエライトから選ばれた１種以上
により形成したことを特徴とする請求項１記載のディー
ゼル排気ガス粒子浄化装置。6. The method according to claim 1, wherein the porous body is made of at least one selected from an iron-chromium-aluminum heat-resistant wire mesh, a nickel-chromium-aluminum metal foam, and cordierite. Diesel exhaust particle purification equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001100026A JP2002295226A (en) | 2001-03-30 | 2001-03-30 | Particulate cleaner for diesel exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001100026A JP2002295226A (en) | 2001-03-30 | 2001-03-30 | Particulate cleaner for diesel exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002295226A true JP2002295226A (en) | 2002-10-09 |
Family
ID=18953506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001100026A Pending JP2002295226A (en) | 2001-03-30 | 2001-03-30 | Particulate cleaner for diesel exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002295226A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007244951A (en) * | 2006-03-14 | 2007-09-27 | Nissan Motor Co Ltd | Manufacturing method of particulate filter type exhaust gas cleaning catalyst, and particulate filter type exhaust gas cleaning catalyst |
| JP2007244950A (en) * | 2006-03-14 | 2007-09-27 | Nissan Motor Co Ltd | Particulate filter type exhaust gas cleaning catalyst and particulate filter |
| EP2119500A1 (en) * | 2007-03-14 | 2009-11-18 | Nissan Motor Co., Ltd. | Fiber structure and particulate-filter-type exhaust gas clean-up catalyst |
| US7718143B2 (en) | 2003-01-10 | 2010-05-18 | Toyota Jidosha Kabushiki Kaisha | Filter catalyst for purifying exhaust gases |
| US7781014B2 (en) | 2004-02-10 | 2010-08-24 | Cataler Corporation | Process for producing a filter catalyst |
-
2001
- 2001-03-30 JP JP2001100026A patent/JP2002295226A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7718143B2 (en) | 2003-01-10 | 2010-05-18 | Toyota Jidosha Kabushiki Kaisha | Filter catalyst for purifying exhaust gases |
| US7781014B2 (en) | 2004-02-10 | 2010-08-24 | Cataler Corporation | Process for producing a filter catalyst |
| JP2007244951A (en) * | 2006-03-14 | 2007-09-27 | Nissan Motor Co Ltd | Manufacturing method of particulate filter type exhaust gas cleaning catalyst, and particulate filter type exhaust gas cleaning catalyst |
| JP2007244950A (en) * | 2006-03-14 | 2007-09-27 | Nissan Motor Co Ltd | Particulate filter type exhaust gas cleaning catalyst and particulate filter |
| EP2119500A1 (en) * | 2007-03-14 | 2009-11-18 | Nissan Motor Co., Ltd. | Fiber structure and particulate-filter-type exhaust gas clean-up catalyst |
| EP2119500A4 (en) * | 2007-03-14 | 2012-12-26 | Nissan Motor | Fiber structure and particulate-filter-type exhaust gas clean-up catalyst |
| US8529843B2 (en) | 2007-03-14 | 2013-09-10 | Nissan Motor Co., Ltd. | Fibrous structure and particulate filter type exhaust gas purifying catalyst |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1316152C (en) | Filter catalyst for waste gas purification | |
| JP4055710B2 (en) | Diesel exhaust gas purification filter | |
| JP2009519814A (en) | Coated diesel exhaust filter with low pressure drop | |
| JPH0994434A (en) | Waste gas purifying filter | |
| KR100747088B1 (en) | Dpf with improving heat durability | |
| JP2006136784A (en) | Filter catalyst | |
| JP2010269205A (en) | Catalyst for cleaning exhaust gas | |
| JP4006645B2 (en) | Exhaust gas purification device | |
| JP2012036821A (en) | Exhaust emission control system of internal combustion engine | |
| JP2002295226A (en) | Particulate cleaner for diesel exhaust gas | |
| JP2006305503A (en) | Ceramic honeycomb filter | |
| JP2001355431A (en) | Exhaust emission control device for diesel engine | |
| JP2002276339A (en) | Diesel exhaust gas processing device | |
| JP2009228618A (en) | Exhaust emission control device | |
| JP2002309923A (en) | Diesel exhaust emission purifier | |
| JP2003190793A (en) | Filter type catalyst for purifying diesel exhaust gas | |
| JP2006077672A (en) | Exhaust emission control filter and exhaust emission control device | |
| JP4649587B2 (en) | Exhaust gas purification filter and collection method of particulate matter | |
| JP2003056327A (en) | Exhaust fine particle collecting filter of self- regeneration type | |
| JP2009247995A (en) | Exhaust gas cleaning catalyst and production method thereof | |
| JP2008229459A (en) | Exhaust gas cleaning device | |
| JP2007244950A (en) | Particulate filter type exhaust gas cleaning catalyst and particulate filter | |
| JP2001205108A (en) | Particulate filter | |
| JP2003225540A (en) | Device and method for cleaning exhaust gas | |
| JP2003220342A (en) | Filter for cleaning exhaust gas |