JP2002309923A - Diesel exhaust emission purifier - Google Patents
Diesel exhaust emission purifierInfo
- Publication number
- JP2002309923A JP2002309923A JP2001113042A JP2001113042A JP2002309923A JP 2002309923 A JP2002309923 A JP 2002309923A JP 2001113042 A JP2001113042 A JP 2001113042A JP 2001113042 A JP2001113042 A JP 2001113042A JP 2002309923 A JP2002309923 A JP 2002309923A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- heat
- diesel exhaust
- trachea
- filled
- 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
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000007789 gas Substances 0.000 claims abstract description 37
- 239000012210 heat-resistant fiber Substances 0.000 claims abstract description 29
- 239000000919 ceramic Substances 0.000 claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims abstract description 10
- 230000003647 oxidation Effects 0.000 claims abstract description 7
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 7
- 239000002250 absorbent Substances 0.000 claims abstract description 6
- 230000002745 absorbent Effects 0.000 claims abstract description 6
- 210000003437 trachea Anatomy 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000011148 porous material Substances 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
- 229910052878 cordierite Inorganic materials 0.000 claims description 5
- 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 5
- 238000000746 purification Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 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
- 239000010953 base metal Substances 0.000 claims description 3
- -1 platinum group metals Chemical class 0.000 claims description 3
- 229910000502 Li-aluminosilicate Inorganic materials 0.000 claims description 2
- 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
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 229910052863 mullite Inorganic materials 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 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
- 239000013618 particulate matter Substances 0.000 abstract description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 abstract description 7
- 239000011593 sulfur Substances 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 description 10
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 229910018557 Si O Inorganic materials 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 229910018516 Al—O Inorganic materials 0.000 description 1
- 101100325793 Arabidopsis thaliana BCA2 gene Proteins 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 102100033040 Carbonic anhydrase 12 Human genes 0.000 description 1
- 102100033041 Carbonic anhydrase 13 Human genes 0.000 description 1
- 101000867855 Homo sapiens Carbonic anhydrase 12 Proteins 0.000 description 1
- 101000867860 Homo sapiens Carbonic anhydrase 13 Proteins 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 101100219325 Phaseolus vulgaris BA13 gene Proteins 0.000 description 1
- 229910007746 Zr—O Inorganic materials 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910003446 platinum oxide Inorganic materials 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ディーゼル排ガス
浄化装置に関し、 更に詳細にはデイーゼルエンジンの排
気ガスを浄化する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, and more particularly to a device for purifying exhaust gas of a diesel engine.
【０００２】[0002]
【従来の技術】ディーゼルエンジンの排気ガス中には、
健康を害する窒素酸化物（ＮＯｘ）や粒子状物質（Ｐ
Ｍ）が含まれており、これらを除去する必要がある。2. Description of the Related Art Diesel engine exhaust gas contains
Nitrogen oxides (NOx) and particulate matter (P
M), which must be removed.
【０００３】窒素酸化物を除く方法としては、窒素酸化
物をコーディエライト質などの多孔性セラミックス製ハ
ニカム構造体に酸化バリウムなどを担持させ、 この酸化
バリウムに窒素酸化物を一旦吸収させた後、二酸化窒素
（ＮＯ2 ）として離脱させ、排気ガス中の炭化水素（Ｈ
Ｃ）と還元反応させて窒素（Ｎ2 ）、水（Ｈ2 Ｏ）およ
び二酸化炭素（ＣＯ2 ）に変換させて除去するものが知
られている。[0003] As a method for removing nitrogen oxides, barium oxide or the like is supported on a porous ceramic honeycomb structure such as cordierite, and the nitrogen oxides are temporarily absorbed by the barium oxide. , Nitrogen dioxide (NO 2 ) and hydrocarbons (H
It is known that the compound is subjected to a reduction reaction with C) and converted into nitrogen (N 2 ), water (H 2 O) and carbon dioxide (CO 2 ) for removal.
【０００４】また、 粒子状物質（ＰＭ）除去のためには
コーディエライト質や炭化ケイ素などの多孔性セラミッ
クス製ハニカム構造体のハニカム壁をフィルターとして
使用するものが知られている。In order to remove particulate matter (PM), it is known to use a honeycomb wall made of porous ceramics such as cordierite or silicon carbide as a filter.
【０００５】[0005]
【発明が解決しようとする課題】ところで前記ハニカム
構造体は、単位容積当たりフィルター面積が小さいた
め、ディーゼルエンジンの排気ガス浄化に使用しようと
すると装置全体が大きくなるという問題と、軽油中に含
まれる硫黄が潤滑成分と反応して無機物質となり、この
無機物質がハニカム壁の気孔を閉塞するという問題があ
る。このため、ハニカム構造体を頻繁に交換するか、洗
浄する必要があった。However, since the honeycomb structure has a small filter area per unit volume, if the honeycomb structure is used for purifying exhaust gas of a diesel engine, the whole device becomes large, and the honeycomb structure is included in light oil. Sulfur reacts with the lubricating component to form an inorganic substance, which has a problem that the inorganic substance blocks the pores of the honeycomb wall. Therefore, it is necessary to frequently replace or wash the honeycomb structure.
【０００６】またハニカム壁に粒子状物質が異常に堆積
する走行条件では、堆積した粒子状物質の異常燃焼が起
こり、ハニカム壁が破損や熔損するという不都合が生じ
ていた。[0006] Further, under running conditions in which particulate matter accumulates abnormally on the honeycomb wall, abnormal combustion of the accumulated particulate matter occurs, and the honeycomb wall is damaged or melted.
【０００７】本発明は、以上の問題に着目してなされた
ものであり、ディーゼルエンジンの排気ガスの中の窒素
酸化物や粒子状物質を浄化し、しかも粒子状物質の捕集
容量を大きくし、且つ軽油中の硫黄成分の影響を小さく
するディーゼル排ガス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 problems, and has been made to purify nitrogen oxides and particulate matter in exhaust gas of a diesel engine and to increase the trapping capacity of particulate matter. It is another object of the present invention to provide a diesel exhaust gas purifying apparatus that reduces the influence of sulfur components in light oil.
【０００８】[0008]
【課題を解決するための手段】以上の目的を達成するた
めのディーゼル排ガス浄化装置は、多孔質セラミックス
製ハニカム構造体によって形成される両端が開口する筒
状気管の前記開口を、隣接する前記筒状気管と互に反対
側をセラミックス材により封止し、いわゆるウオールフ
ロータイプとし、該筒状気孔内に流入したディーゼルエ
ンジンの排気ガスがハニカム壁からなるフィルター部を
貫通して隣接する前記筒状気管内に流入し、反対側に流
出するように形成し、前記流入側筒状気管内に酸化触媒
を担持させた耐熱性繊維を充填し、前記流出側の前記筒
状気管内に窒素酸化物の吸収剤を担持させた耐熱性繊維
を充填したものである。In order to achieve the above object, a diesel exhaust gas purifying apparatus is characterized in that the opening of a tubular trachea having both ends opened by a porous ceramic honeycomb structure is connected to the adjacent cylinder. The opposite side of the tubular pipe is sealed with a ceramic material to form a so-called wall flow type, and the exhaust gas of the diesel engine that has flowed into the tubular pores penetrates a filter portion formed of a honeycomb wall and is adjacent to the tubular pipe. It is formed so that it flows into the trachea and flows out to the opposite side, and the heat-resistant fiber carrying an oxidation catalyst is filled in the inflow-side tubular trachea, and nitrogen oxide is contained in the tubular trachea on the outflow side. Filled with heat-resistant fibers carrying an absorbent.
【０００９】前記多孔性セラミックスとしては特に限定
はないが、好ましいものとしてはコーディエライト、炭
化珪素、酸化アルミニウム、リチウムアルミノシリケー
トなどを、それぞれ単独または適宜混合して使用するこ
とができる。Although there is no particular limitation on the porous ceramic, cordierite, silicon carbide, aluminum oxide, lithium aluminosilicate and the like can be preferably used alone or in an appropriate mixture.
【００１０】前記耐熱性繊維としては特に限定はない
が、好ましいものとしてはＳｉ−Ｃ−Ｏを主要成分とす
る炭化珪素系、Ａｌ−Ｏを主要成分とするアルミナ系、
Ｓｉ−Ｏを主要成分とするシリカ系、Ａｌ−Ｓｉ−Ｏを
主要成分とするムライト系、Ｓｉ−Ｏ−Ｎを主要成分と
する窒化珪素系およびＺｒ−Ｏを主要成分とするジルコ
ニア系などを、それぞれ単独または適宜混合して使用す
ることができる。The heat-resistant fiber is not particularly limited, but is preferably a silicon carbide-based material mainly composed of Si-CO, an alumina-based material mainly composed of Al-O,
Silica based on Si-O as a main component, mullite based on Al-Si-O, silicon nitride based on Si-ON and zirconia based on Zr-O, etc. , Can be used alone or in combination as appropriate.
【００１１】前記耐熱性繊維の繊維径には特に限定はな
いが、径が６〜１８マイクロメートルのものを使用する
ことができる。繊維長は、 筒状器等に用意に充填できる
長さのものであればよい。耐熱繊維を筒状器等に充填す
るには、 ウオールフロータイプとしたハニカム構造体の
一方の筒状気管から吸引することにより容易に反対側の
筒状気管内に充填することができる。The fiber diameter of the heat-resistant fiber is not particularly limited, but a fiber having a diameter of 6 to 18 micrometers can be used. The fiber length may be any length as long as it can be easily filled in a cylindrical container or the like. In order to fill the heat-resistant fiber into a cylindrical vessel or the like, it is possible to easily fill the cylindrical pipe on the opposite side by sucking the heat-resistant fiber from one cylindrical trachea of the honeycomb structure of the wall flow type.
【００１２】前記酸化触媒としては特に限定はないが、
好ましいものとしては白金族の金属、その酸化物、卑金
属酸化物などを、それぞれ単独または適宜混合して使用
することができる。前記触媒を耐熱性繊維に端持させる
には、繊維上にアルミナ保持層を形成させ、その上に前
記触媒を担時させることができる。前記白金族としては
白金、ロジウム、イリジウムなどであり、また前記卑金
属としては、マグネシウム、ストロンチウム、カルシウ
ム、バナジウム、セシウムなどを使用することができ
る。Although the oxidation catalyst is not particularly limited,
Preferable metals such as platinum group metals, oxides thereof, and base metal oxides can be used alone or in a suitable mixture. In order for the catalyst to be supported by the heat-resistant fiber, an alumina holding layer can be formed on the fiber, and the catalyst can be supported thereon. Examples of the platinum group include platinum, rhodium, and iridium, and examples of the base metal include magnesium, strontium, calcium, vanadium, and cesium.
【００１３】前記ハニカム構造体の少なくとも排気ガス
出口側に、前記筒状気筒内に充填した耐熱性繊維が外部
に脱出しないように、例えば金網、 多孔金属および多孔
性セラミックスなどの多孔体を配置することができる。At least on the exhaust gas outlet side of the honeycomb structure, a porous body such as a wire mesh, a porous metal, or a porous ceramic is disposed so that the heat-resistant fiber filled in the cylindrical cylinder does not escape to the outside. be able to.
【００１４】バルク状に筒状気管内に充填された耐熱性
繊維は、フィルターとして作用し、しかも熱歪を受ける
ことが殆どないので、繊維上または繊維間に粒子状物質
が異常に堆積したために異常燃焼をしても熱衝撃を吸収
し、ハニカム壁の破損や、熔損を防止することができ
る。The heat-resistant fiber filled into the tubular trachea in a bulk form acts as a filter and is hardly subject to thermal strain. Therefore, since particulate matter is abnormally deposited on or between the fibers. Even if abnormal combustion occurs, thermal shock can be absorbed and damage to the honeycomb wall and melting can be prevented.
【００１５】[0015]
【発明の実施の形態】以下添付の図面を参照する一実施
の形態を示し本発明を具体的に説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;
【００１６】図１〜４に示すディーゼル排ガス浄化装置
（以下単に浄化装置）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る。A diesel exhaust gas purifying apparatus (hereinafter simply referred to as a purifying apparatus) 1 shown in FIGS. 1 to 4 comprises an exhaust pipe 4 between an exhaust manifold 3 of a diesel engine 2 and a muffler (not shown).
It is used by interposing it.
【００１７】浄化装置１は、図２、３に示すように、例
えばコーディエライトによって平均細孔径が３５マイク
ロメートルの多孔体に焼成したハニカム構造体（本体）
５を形成し、その中に形成される筒状気管６の開口を、
隣接する筒状気管６同士の開口方向が互いに反対方向と
なるように一方の開口をセラミックス材７で封止（いず
れの図も黒く塗り潰して表示）して、いわゆるウオール
フロータイプとし、筒状気管６のハニカム壁をフィルタ
ー部８として使用するものである。As shown in FIGS. 2 and 3, the purifying apparatus 1 has a honeycomb structure (main body) fired into a porous body having an average pore diameter of 35 micrometers by, for example, cordierite.
5 and the opening of the tubular trachea 6 formed therein,
One of the openings is sealed with a ceramic material 7 so that the opening directions of the adjacent tubular trachea 6 are opposite to each other (shown in black in all figures) to form a so-called wall flow type. The honeycomb wall 6 is used as the filter section 8.
【００１８】したがって、図３のIVーIV線矢視図に示す
ように筒状気管６-1の開口とセラミックス材７とが市松
模様状に配置され、反対側、 即ち筒状気管６-2の開口側
のパターンは図４と白黒を入れ替えたパターンとなる。Therefore, the opening of the tubular trachea 6-1 and the ceramic material 7 are arranged in a checkered pattern as shown in the view taken along the line IV-IV in FIG. The pattern on the opening side is a pattern in which the black and white of FIG.
【００１９】そして、排気ガス（矢印で表示）が本体に
流入するＡ側に開口する筒状気管６-1内に、例えば白金
および酸化バナジウムからなる混合触媒を担持させた耐
熱性繊維10-1（図３）を、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、例えば酸化バ
リウムなどの窒素酸化物吸収剤を担持させた耐熱性繊維
10-2（以下耐熱性繊維を総称するときは枝番を省略して
表す）をそれぞれ充填し、本体５の両端に例えば耐熱金
属製金網11を配置し、充填した耐熱性繊維10が外に飛び
出さないようにした。A heat-resistant fiber 10-1 in which a mixed catalyst made of, for example, platinum and vanadium oxide is carried in a tubular trachea 6-1 opening on the side A where exhaust gas (indicated by an arrow) flows into the main body. (FIG. 3), and a heat-resistant fiber in which a nitrogen oxide absorbent such as barium oxide is carried in a tubular trachea 6-2 opening to the B side where exhaust gas flows out of the main body 5.
10-2 (hereinafter, branch numbers are omitted when collectively referring to heat-resistant fibers), and a heat-resistant metal wire mesh 11, for example, is arranged at both ends of the main body 5, and the filled heat-resistant fibers 10 are placed outside. I tried not to jump out.
【００２０】なお前記耐熱性繊維10は、いずれも例えば
繊維径１４マイクロメートル、繊維長５ｍｍの炭化珪素
繊維を使用した。また耐熱性繊維10-1（または10-2）を
筒状気管６-1（または６-2）に充填するには、繊維を反
対側の筒状気管６-2（または６-1）から吸引すればよ
い。As the heat-resistant fiber 10, a silicon carbide fiber having a fiber diameter of 14 micrometers and a fiber length of 5 mm was used. To fill the heat-resistant fiber 10-1 (or 10-2) into the tubular trachea 6-1 (or 6-2), the fiber is filled from the opposite tubular trachea 6-2 (or 6-1). What is necessary is just to suction.
【００２１】以上のように形成した本体５は、遮熱ケー
ス12に入れ、浄化装置１のケーシング13（図２）に装着
した。なお図２に示す上流側圧力センサー14-1および下
流が差圧力センサ−14-2は、フィルター部８の目詰まり
検出用である。The main body 5 formed as described above was placed in a heat shield case 12 and mounted on a casing 13 (FIG. 2) of the purification device 1. The upstream pressure sensor 14-1 and the downstream differential pressure sensor 14-2 shown in FIG. 2 are for detecting clogging of the filter unit 8.
【００２２】以上のように形成した本実施の形態のディ
ーゼル排ガス浄化装置１の動作を説明する。図３におい
て、前記Ａは、耐熱性繊維10-1を充填した筒状気管６-1
に流入し、繊維充填層を通過する間に粒子状物質（Ｐ
Ｍ）が耐熱性繊維10-1に捕捉され、酸化除去される。ま
た燃料中の硫黄成分も耐熱性繊維10-1に捕捉され酸化し
繊維表面に付着するので、多孔性セラミックスの気孔の
目詰まりを防止することができる。The operation of the diesel exhaust gas purifying apparatus 1 of the present embodiment formed as described above will be described. In FIG. 3, A is a tubular trachea 6-1 filled with a heat-resistant fiber 10-1.
And the particulate matter (P
M) is captured by the heat-resistant fiber 10-1 and is oxidized and removed. Further, the sulfur component in the fuel is also captured by the heat-resistant fiber 10-1 and oxidized and adheres to the fiber surface, so that clogging of pores of the porous ceramic can be prevented.
【００２３】前記フィルター部８を通過した排気ガス
は、筒状気管６-2に流入し、耐熱性繊維10-2の充填層を
通過する際に酸化窒素（ＮＯｘ）が酸化窒素吸収剤に吸
収除去され、浄化された排気ガスは浄化装置１のＢ部か
ら排気管４に排出される。吸収された酸化窒素は、二酸
化窒素（ＮＯ2 ）として離脱し、排気ガス中の炭化水素
（ＨＣ）と還元反応させて窒素（Ｎ2 ）、水（Ｈ2 Ｏ）
および二酸化炭素（ＣＯ 2 ）に変換されて除去される。Exhaust gas passing through the filter section 8
Flows into the tubular trachea 6-2 and forms a packed layer of heat-resistant fiber 10-2.
When passing, nitric oxide (NOx) is absorbed by the nitric oxide absorbent.
Exhaust gas that has been removed and purified is
Is discharged to the exhaust pipe 4. The absorbed nitric oxide is diacid
Nitrogen (NOTwo) And hydrocarbons in the exhaust gas
(HC) and nitrogen (NTwo), Water (HTwoO)
And carbon dioxide (CO Two) And removed.
【００２４】以下に図１に示す装置を用い、ディーゼル
１３モード試験により、浄化装置１を用いた場合の浄化
性能を、浄化装置を使用しない場合と比較した結果を表
１に示す。Table 1 below shows the results of comparison of the purification performance when using the purifying apparatus 1 with the apparatus shown in FIG. 1 in a diesel 13 mode test, compared with the case where the purifying apparatus is not used.
【００２５】[0025]
【表１】 [Table 1]
【００２６】表１に示す結果から明らかなように浄化装
置１の窒素酸化物および粒子状物質の除去能力は、浄化
装置１を用いない場合に比較して浄化効果に顕著な向上
が認められる。また、本実施の形態の浄化装置は、硫黄
成分による目詰まりが抑制され、酸化触媒を担持させた
耐熱性繊維10-1を筒状気管６-1に充填したことの効果が
顕著であった。As is clear from the results shown in Table 1, the purifying device 1 has a remarkable improvement in the purifying effect as compared with the case where the purifying device 1 is not used. Further, in the purification apparatus of the present embodiment, clogging due to the sulfur component was suppressed, and the effect of filling the heat-resistant fiber 10-1 supporting the oxidation catalyst into the tubular trachea 6-1 was remarkable. .
【００２７】[0027]
【発明の効果】以上説明したとおり本発明のディーゼル
排ガス浄化装置は、多孔性セラミックス製ハニカム構造
体を、いわゆるウオールフロータイプのフィルターとし
て使用し、筒状気管の排気ガス流入側には酸化触媒を担
持させた耐熱性繊維により排気ガス中の粒子状物質およ
び硫黄成分を捕集するようにし、捕集された粒子状物質
の異常燃焼によるハニカム壁の破損や熔損の防止および
硫黄成分によるセラミックスの気孔の詰まりを防止する
ことができ、また、流出側筒状気管内に窒素酸化物吸収
剤を担持させた耐熱性繊維を充填したので、外部に排出
させる排気ガス中の窒素酸化物を低減させ、浄化装置の
信頼性を向上させることができる。As described above, the diesel exhaust gas purifying apparatus of the present invention uses a honeycomb structure made of porous ceramics as a so-called wall flow type filter, and has an oxidation catalyst on the exhaust gas inflow side of the tubular trachea. The supported heat-resistant fibers trap particulate matter and sulfur components in the exhaust gas to prevent the honeycomb wall from being damaged or melted due to abnormal combustion of the trapped particulate matter, and the ceramic component due to sulfur components. The clogging of pores can be prevented, and the outflow-side tubular trachea is filled with heat-resistant fibers carrying a nitrogen oxide absorbent, so that nitrogen oxides in exhaust gas discharged to the outside can be reduced. In addition, the reliability of the purification device can be improved.
【図１】本発明の一実施の形態によるディーゼル排ガス
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 view showing a state in which a diesel exhaust gas purifying apparatus 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の部分拡大断面図である。FIG. 3 is a partially enlarged sectional view of FIG. 2;
【図４】図３に示すハニカム構造体のIV−IV線拡大矢視
図である。FIG. 4 is an enlarged view of the honeycomb structure shown in FIG. 3 taken along line IV-IV.
１ ディーゼル排ガス浄化装置（以下単に浄化装置）
１ ディーゼル排ガス浄化装置（以下単に浄化装置） ２ ディーゼルエンジン ５ ハニカム構造体（本体） ６ 筒状気管 ６-1 流入側筒状気管 ６-2 流出側筒状気管 ７ セラミックス材 ８ フィルター部（ハニカム壁） 10-1 耐熱性繊維 10-2 耐熱性繊維1 Diesel exhaust gas purifier (hereinafter simply purifier)
DESCRIPTION OF SYMBOLS 1 Diesel exhaust gas purifier (hereinafter simply referred to as purifier) 2 Diesel engine 5 Honeycomb structure (main body) 6 Cylindrical trachea 6-1 Inlet-side cylindrical trachea 6-2 Outflow-side cylindrical trachea 7 Ceramics material 8 Filter section (honeycomb wall) 10-1 Heat resistant fiber 10-2 Heat resistant fiber
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 39/14 Ｂ０１Ｄ 39/14 Ｐ ４Ｇ０６６ 39/20 39/20 Ｄ ４Ｇ０６９ 53/94 Ｂ０１Ｊ 20/04 Ｃ Ｂ０１Ｊ 20/04 35/04 ３０１Ｈ 35/04 ３０１ Ｆ０１Ｎ 3/08 Ａ Ｆ０１Ｎ 3/08 3/10 Ａ 3/10 Ｂ０１Ｄ 46/00 ３０２ // Ｂ０１Ｄ 46/00 ３０２ 46/30 Ｂ 46/30 53/36 １０３Ｂ Ｆターム(参考） 3G090 AA03 BA02 3G091 AA18 AB13 BA01 BA13 CA02 GB06W GB10W GB17W 4D019 AA01 BA05 BB06 BB13 BC05 BC07 CB04 4D048 AA02 AA06 AA14 AB01 AB02 BA03Y BA06Y BA08Y BA15Y BA30Y BA41Y BA42Y BA45Y BB02 CD05 EA04 4D058 JA32 JA37 JA60 JB06 JB22 MA44 SA08 TA02 4G066 AA16B AA20C AA22C AA23C AA42C AA51C BA16 CA28 DA02 4G069 AA03 BA01A BA03A BA05A BB04A BB06A BB11A BB15 BC75A BD05 CA03 CA07 CA08 CA12 CA13 CA18 DA06 EA03 EA19 Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) B01D 39/14 B01D 39/14 P 4G066 39/20 39/20 D 4G069 53/94 B01J 20/04 C B01J 20/04 35/04 301H 35/04 301 F01N 3/08 A F01N 3/08 3/10 A 3/10 B01D 46/00 302 // B01D 46/00 302 46/30 B 46/30 53/36 103B F term ( Reference) 3G090 AA03 BA02 3G091 AA18 AB13 BA01 BA13 CA02 GB06W GB10W GB17W 4D019 AA01 BA05 BB06 BB13 BC05 BC07 CB04 4D048 AA02 AA06 AA14 AB01 AB02 BA03Y BA06Y BA08Y BA15Y BA30Y BA41B BAJA4 BA02B04A04 BA02B04A04 AA20C AA22C AA23C AA42C AA51C BA16 CA28 DA02 4G069 AA03 BA01A BA03A BA05A BB04A BB06A BB11A BB15 BC75A BD05 CA03 CA07 CA08 CA12 CA13 CA18 DA06 EA03 EA19
Claims (5)
に形成され、両端が開口する筒状気管の前記開口を、隣
接する前記筒状気管と互に反対側をセラミックス材によ
り封止し、該筒状気孔内に流入したディーゼルエンジン
の排気ガスがハニカム壁からなるフィルター部を貫通し
て隣接する前記筒状気管内に流入し、反対側に流出する
ように形成し、前記流入側筒状気管内に酸化触媒を担持
させた耐熱性繊維を充填し、前記流出側の前記筒状気管
内に窒素酸化物の吸収剤を担持させた耐熱性繊維を充填
したことを特徴とするディーゼル排ガス浄化装置。1. An opening of a tubular trachea formed in a porous ceramic honeycomb structure and having both ends opened, the opening opposite to the adjacent tubular trachea is sealed with a ceramic material. The exhaust gas of the diesel engine that has flowed into the cylindrical pores is formed to penetrate through the filter portion formed of the honeycomb wall, flow into the adjacent cylindrical trachea, and flow out to the opposite side, and A diesel exhaust gas purifying apparatus characterized in that heat-resistant fibers carrying an oxidation catalyst are filled therein and heat-resistant fibers carrying a nitrogen oxide absorbent are filled in the tubular trachea on the outflow side.
ライト、炭化珪素、酸化アルミニウムおよびリチウムア
ルミノシリケートから選ばれた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ガス浄化装置。2. The diesel exhaust gas purifying apparatus according to claim 1, wherein the porous ceramic is at least one selected from cordierite, silicon carbide, aluminum oxide, and lithium aluminosilicate.
ナ系、シリカ系、ムライト系、窒素化珪素系およびジル
コニア系から選ばれた１種以上を使用することを特徴と
する請求項１または２記載のディーゼル排ガス浄化装
置。3. The heat resistant fiber according to claim 1, wherein at least one selected from the group consisting of silicon carbide, alumina, silica, mullite, silicon nitride, and zirconia is used. 2. The diesel exhaust gas purifying apparatus according to 2.
物ならびに卑金属酸化物から選ばれた１種以上であるこ
とを特徴とする請求項１、２または３記載のディーゼル
排ガス浄化装置。4. The diesel exhaust gas purifying apparatus according to claim 1, wherein the oxidation catalyst is at least one selected from platinum group metals and oxides and base metal oxides.
ス出口側に、金網、 多孔金属および多孔性セラミックス
から選ばれた１種以上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ガス浄化装
置。5. The honeycomb structure according to claim 1, wherein at least one selected from a wire mesh, a porous metal, and a porous ceramic is disposed at least on an exhaust gas outlet side of the honeycomb structure. Diesel exhaust purification equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001113042A JP2002309923A (en) | 2001-04-11 | 2001-04-11 | Diesel exhaust emission purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001113042A JP2002309923A (en) | 2001-04-11 | 2001-04-11 | Diesel exhaust emission purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002309923A true JP2002309923A (en) | 2002-10-23 |
Family
ID=18964339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001113042A Pending JP2002309923A (en) | 2001-04-11 | 2001-04-11 | Diesel exhaust emission purifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002309923A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007515260A (en) * | 2003-09-26 | 2007-06-14 | ナムローゼ・フェンノートシャップ・ベーカート・ソシエテ・アノニム | Catalytic converter and method for producing the same |
| CN1327163C (en) * | 2004-10-28 | 2007-07-18 | 上海交通大学 | Photo catalysis reaction chamber fir air purification |
| 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 |
| US7914748B2 (en) | 2005-07-21 | 2011-03-29 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification apparatus of internal combustion engine |
-
2001
- 2001-04-11 JP JP2001113042A patent/JP2002309923A/en active Pending
Cited By (9)
| 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 |
| JP2007515260A (en) * | 2003-09-26 | 2007-06-14 | ナムローゼ・フェンノートシャップ・ベーカート・ソシエテ・アノニム | Catalytic converter and method for producing the same |
| CN1327163C (en) * | 2004-10-28 | 2007-07-18 | 上海交通大学 | Photo catalysis reaction chamber fir air purification |
| US7914748B2 (en) | 2005-07-21 | 2011-03-29 | Toyota Jidosha Kabushiki Kaisha | Exhaust purification apparatus of internal combustion engine |
| 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 |
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