JP2850689B2 - Exhaust gas purification device - Google Patents
Exhaust gas purification deviceInfo
- Publication number
- JP2850689B2 JP2850689B2 JP5022151A JP2215193A JP2850689B2 JP 2850689 B2 JP2850689 B2 JP 2850689B2 JP 5022151 A JP5022151 A JP 5022151A JP 2215193 A JP2215193 A JP 2215193A JP 2850689 B2 JP2850689 B2 JP 2850689B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- fuel
- catalytic converter
- exhaust
- catalyst
- 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.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—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 methods of operation; Control
- F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/30—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel reformer
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はディーゼルエンジン等の
原動機から排出される排気ガス中の窒素酸化物（以下Ｎ
Ｏx という）を除去する排気ガス浄化装置、特にＮＯx
還元触媒に還元用炭化水素を添加してＮＯx 浄化効率を
向上させる排気ガス浄化装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to nitrogen oxides (hereinafter referred to as N) in exhaust gas discharged from a prime mover such as a diesel engine.
O x hereinafter) exhaust gas purification device for removing, in particular, NO x
By adding a reducing for hydrocarbons in the reducing catalyst to an exhaust gas purifying apparatus to improve the NO x purification efficiency.
【０００２】[0002]
【従来の技術】通常、供給酸素量が多い状態で運転され
るディーゼルエンジンではＮＯx の排出量が高レベルと
なる。このためディーゼルエンジンの排気系には酸素過
剰下でＮＯx を還元処理できる窒素酸化物還元触媒を内
蔵したＮＯx 触媒コンバータが装着される傾向にある。BACKGROUND ART Normally, emissions of the NO x becomes high level in the diesel engine is operated in a state the supply amount of oxygen is large. Therefore the exhaust system of a diesel engine tends to the NO x catalyst converter with an internal nitrogen oxide reduction catalyst capable of reducing processing NO x in oxygen-excessive under is mounted.
【０００３】ところで、ディーゼルエンジンの排気系に
ＮＯx を還元処理できるＮＯx 触媒が装着された場合、
該ＮＯx 触媒は、図４に示すような活性化温度Ｔｓｏを
上回るとその浄化効率を向上させる事が知られており、
図５に示すような触媒活性域Ａを有している。ここで横
軸にはＨＣ／ＮＯx の体積比であるモル比が取られ、縦
軸には排気ガスの温度が取られており、ここでの触媒活
性域はＨＣ／ＮＯx モル比が１以上ある場合と成ってい
る。ＮＯx 触媒の浄化効率を高める手段としては、排気
路のＮＯx 触媒の上流側に還元用炭化水素ＨＣを添加す
ることが有効であることが知られている。Meanwhile, if the NO x catalyst capable of reducing processing NO x in an exhaust system of a diesel engine is mounted,
It is known that the NO x catalyst improves its purification efficiency when it exceeds an activation temperature Tso as shown in FIG.
It has a catalyst active area A as shown in FIG. Here the horizontal axis molar ratio is the volume ratio of HC / NO x is taken, the vertical axis is taken the temperature of the exhaust gas, catalytic activity zone where HC / NO x molar ratio is 1 The above is the case. As a means to enhance the purification efficiency of the NO x catalyst, is adding a reducing for hydrocarbons HC at the upstream side of the NO x catalyst in the exhaust passage is known to be effective.
【０００４】前記還元用炭化水素（以下ＨＣと称する）
を添加する手段として、軽油を加熱分解して還元用ＨＣ
を得、これを排気ガス浄化用触媒コンバータの上流に注
入する手段がある。[0004] The reducing hydrocarbon (hereinafter referred to as HC)
As a means to add, heat decomposition of light oil to reduce HC
There is a means for injecting this upstream of the catalytic converter for purifying exhaust gas.
【０００５】図３に前記還元用ＨＣ生成する燃料改質装
置を備えたディーゼルエンジン用排気ガス浄化装置の従
前の１例を示す。図において、１はディーゼルエンジ
ン、２は該エンジン１の排気マニホールド、３は排気
管、４は排気ガス浄化用触媒コンバータである。該触媒
コンバータ４は、ゼオライト系等のＮＯx 還元用触媒を
備えた公知のＮＯx 還元触媒コンバータである。FIG. 3 shows a conventional example of an exhaust gas purifying apparatus for a diesel engine provided with the fuel reforming apparatus for producing the reducing HC. In the figure, 1 is a diesel engine, 2 is an exhaust manifold of the engine 1, 3 is an exhaust pipe, and 4 is a catalytic converter for purifying exhaust gas. The catalytic converter 4 is known of the NO x reduction catalytic converter with the NO x reduction catalyst for zeolite and the like.
【０００６】５は軽油を加熱、分解してＮＯx 還元用Ｈ
Ｃを生成する燃料改質装置であり、エンジンの燃料タン
ク６から燃料ポンプ７により送給された燃料の軽油を加
熱分解してＮＯx 還元用ＨＣを生成する。このＨＣはＨ
Ｃ供給管８を経て触媒コンバータ４の上流側の排気管３
内に注入される。前記燃料改質装置の詳細な構成、機能
については後述する。９は前記燃料改質装置５と燃料タ
ンク６とを接続する軽油供給管である。[0006] 5 is heating the light oil, decomposition to NO x reduction for H
This is a fuel reformer that generates C, and heat-decomposes light oil of fuel supplied from a fuel tank 6 of an engine by a fuel pump 7 to generate HC for NO x reduction. This HC is H
Exhaust pipe 3 upstream of catalytic converter 4 via C supply pipe 8
Injected into. The detailed configuration and function of the fuel reformer will be described later. 9 is a light oil supply pipe connecting the fuel reformer 5 and the fuel tank 6.
【０００７】[0007]
【発明が解決しようとする課題】前記従来の還元用ＨＣ
を生成する燃料改質装置においては、該燃料改質装置５
内に軽油加熱用ヒータを収納し、エンジン用燃料タンク
６から送給される燃料油即ち軽油を該ヒータにより加熱
し、軽油改質触媒の作用により軽油を分解せしめて、Ｎ
Ｏx 還元用ＨＣを得ている。The above-mentioned conventional reducing HC
In the fuel reformer that generates the fuel, the fuel reformer 5
A heater for heating light oil is housed therein, and the fuel oil, that is, light oil, supplied from the engine fuel tank 6 is heated by the heater, and the light oil is decomposed by the action of the light oil reforming catalyst.
To obtain the O x reduction for HC.
【０００８】しかしながら、加熱用ヒータ及び軽油改質
触媒により、燃料用の軽油を加熱分解して得られるＮＯ
x還元用ＨＣは含有酸素量が少ないため、ＮＯx 浄化用
触媒コンバータ４におけるＮＯx 浄化効率が低いという
問題点がある。[0008] However, NO obtained by heating and decomposing gas oil for fuel by the heater for heating and the gas oil reforming catalyst is used.
Since x reduction for HC containing a small amount of oxygen, there is a problem of low the NO x purification efficiency in the NO x purification catalyst converter 4.
【０００９】本発明は、前記問題点を解消し、ＮＯx 浄
化用触媒コンバータ内におけるＨＣによる還元機能を向
上することにより、ＮＯx 浄化効率を向上せしめた排気
ガス浄化装置を提供する事を目的とする。[0009] The present invention is to solve the above problems, by enhancing the reduction function by HC in the NO x purification for the catalytic converters, intended to provide an exhaust gas purifying apparatus was allowed improved the NO x purification efficiency And
【００１０】[0010]
【課題を解決するための手段】本発明は、前記課題を解
決するため、次のように構成したことを特徴とする。 （１）エンジン等の原動機により駆動される空気圧縮機
（過給機のコンプレッサ等）又は別置きの空気圧縮機に
より生成される圧縮空気を燃料改質装置内に導入して、
軽油等の燃料改質用触媒に作用させて含酸素のＨＣを得
る。Means for Solving the Problems The present invention is characterized by the following constitution in order to solve the above problems. (1) Compressed air generated by an air compressor (such as a supercharger compressor) driven by a prime mover such as an engine or a separately installed air compressor is introduced into a fuel reformer,
Oxygen-containing HC is obtained by acting on a fuel reforming catalyst such as light oil.
【００１１】（２）エンジンの排気ガス路から分岐抽出
した排気ガスを燃料改質装置内に導入し、排気ガス中の
残存酸素を利用することにより前記（１）と同様に、含
酸素のＨＣを得る。(2) The exhaust gas branched and extracted from the exhaust gas passage of the engine is introduced into the fuel reformer, and the residual oxygen in the exhaust gas is utilized to thereby provide the oxygen-containing HC similarly to the above (1). Get.
【００１２】[0012]
【作用】空気圧縮機により生成した圧縮空気又は排気管
路から分岐抽出した排気ガスを燃料改質装置内に導入し
て、燃料改質用触媒に作用させる。この際において、圧
縮空気中及び排気ガス中に含有する酸素により含酸素Ｈ
Ｃが得られる。この含酸素ＨＣをＮＯx 浄化用触媒コン
バータの排気ガス入口の上流側に注入することにより、
ＮＯx 還元作用を促進させる。The compressed air generated by the air compressor or the exhaust gas branched and extracted from the exhaust pipe is introduced into the fuel reformer to act on the fuel reforming catalyst. At this time, oxygen contained in the compressed air and the exhaust gas is
C is obtained. By injecting the oxygen-containing HC at the upstream side of the exhaust gas inlet of the catalytic converter the NO x purification,
Promotes NO x reduction action.
【００１３】特に抽出排気ガスを使用する場合は、排気
ガスが高温、高圧であるので、これ自体の加熱、加圧作
用により、ＨＣの生成を促進させることができる。Particularly when using the extracted exhaust gas, since the exhaust gas has a high temperature and a high pressure, the generation of HC can be promoted by its own heating and pressurizing action.
【００１４】[0014]
【実施例】以下、図面に基づいて本発明の実施例を例示
的に詳しく説明する。但しこの実施例に記載されている
構成部品の寸法、材質、形状、その相対配置などは特に
特定的な記載がない限りは、この発明の範囲をそれのみ
に限定する趣旨ではなく単なる説明例に過ぎない。図
１、図２を参照して本発明の実施例につき詳細に説明す
ると、図１は本発明の第１実施例を示す系統図、図２は
第２実施例を示す系統図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention, but are merely illustrative examples. Not just. The embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. 1 is a system diagram showing a first embodiment of the present invention, and FIG. 2 is a system diagram showing a second embodiment.
【００１５】図１において、１はディーゼルエンジン、
２は該ディーゼルエンジンの排気マニホールド、３は排
気管、４は排気ガス浄化用触媒コンバータである。In FIG. 1, 1 is a diesel engine,
2 is an exhaust manifold of the diesel engine, 3 is an exhaust pipe, and 4 is a catalytic converter for purifying exhaust gas.
【００１６】該触媒コンバータ４は、そのケーシング内
にモノリシス型の触媒担持体を備え、同触媒保持体には
ゼオライト系のＮＯx 触媒が担持されている。ここでゼ
オライト系のＮＯx 触媒としては、例えば銅系ゼオライ
ト触媒（ＣＵ／ＺＳＭ−５）が採用される。この触媒の
特性は、ＨＣの供給を受けることにより、このＨＣ成分
を還元剤としてより活性化し、ＮＯx を効果的にＮ2 と
Ｏ2 に分解すると共に、ＨＣを効果的にＨ2Ｏ 、ＣＯ2
に分解することができる。なお、ゼオライト系のＮＯx
触媒９は上述の図に示したような触媒活性域Ａを有す
る。The catalytic converter 4 has a monolithic catalyst carrier in its casing, and the catalyst carrier carries a zeolite-based NO x catalyst. Here, as the zeolite-based NO x catalyst, for example, a copper-based zeolite catalyst (CU / ZSM-5) is employed. The characteristic of this catalyst is that, by receiving the supply of HC, the HC component is more activated as a reducing agent, and NO x is effectively decomposed into N 2 and O 2 , and HC is effectively converted into H 2 O, CO 2
Can be decomposed into Note that zeolite NO x
The catalyst 9 has a catalytically active region A as shown in the above-mentioned figure.
【００１７】５は、燃料用の軽油を加熱分解してＮＯx
還元用含酸素ＨＣを生成する燃料改質装置であり、該燃
料改質装置５にはエンジンの燃料タンク６から燃料ポン
プ７により軽油が送給されている。８は燃料改質装置に
より生成された含酸素ＨＣを排気ガス浄化用触媒コンバ
ータ４上流の排気管路３中に導入するためのＨＣ供給管
である。９は前記燃料改質装置５と燃料タンク６とを接
続する軽油供給管である。5 is a method for thermally decomposing light oil for fuel to obtain NO x
This is a fuel reformer that generates oxygen-containing HC for reduction. Light oil is supplied to the fuel reformer 5 from a fuel tank 6 of an engine by a fuel pump 7. Reference numeral 8 denotes an HC supply pipe for introducing oxygen-containing HC generated by the fuel reformer into the exhaust pipe 3 upstream of the exhaust gas purifying catalytic converter 4. 9 is a light oil supply pipe connecting the fuel reformer 5 and the fuel tank 6.
【００１８】１０はエンジン１により駆動される空気圧
縮機で、例えば過給機のコンプレッサ等であり、１２は
該空気圧縮機１０と前記燃料改質装置とを接続する空気
管、１１は該空気管１２の圧縮機１０出口を開閉する開
閉弁である。Reference numeral 10 denotes an air compressor driven by the engine 1, for example, a compressor of a supercharger, 12 denotes an air pipe connecting the air compressor 10 and the fuel reformer, and 11 denotes the air pipe. This is an on-off valve for opening and closing the outlet of the compressor 10 of the pipe 12.
【００１９】前記燃料改質装置５は、筒状で、二重壁の
中間部にヒータを有する改質触媒収容器を備え、その内
部に軽油改質触媒が充填されている。前記軽油改質触媒
としては、通常ゼオライト系の軽油改質触媒が適用され
る。The fuel reforming apparatus 5 has a cylindrical reforming catalyst container having a heater in the middle of a double wall, and is filled with a light oil reforming catalyst. As the light oil reforming catalyst, a zeolite-based light oil reforming catalyst is usually applied.
【００２０】以上のように構成された排気ガス浄化装置
において、ディーゼルエンジン１が運転されると、これ
に連動される空気圧縮機１０が運転され、圧縮空気が空
気管１２を通って燃料改質装置５に送給される。In the exhaust gas purifying apparatus configured as described above, when the diesel engine 1 is operated, the air compressor 10 is operated in conjunction therewith, and the compressed air passes through the air pipe 12 to perform the fuel reforming. It is sent to the device 5.
【００２１】前記燃料改質装置５においては、軽油を軽
油改質触媒によって比較的低温（約２８０°Ｃ程度）で
生成物の分布比率を、より低分子化されたものに変化さ
せる。即ち軽油を炭素数１２以下のＨＣ（炭化水素）を
主成分とするように改質してＨＣ供給管８内に送給す
る。In the fuel reformer 5, the distribution ratio of light oil is changed by a light oil reforming catalyst at a relatively low temperature (about 280 ° C.) to a lower molecular weight distribution ratio. That is, light oil is reformed so that it contains HC (hydrocarbon) having 12 or less carbon atoms as a main component, and is fed into the HC supply pipe 8.
【００２２】その際において、空気圧縮機１０から送給
されてきた圧縮空気中の酸素がＨＣに混入され、燃料改
質装置５からは酸素を相当量含有したＨＣが、排気ガス
浄化用触媒コンバータ４の排気ガス管路３中に注入され
る。従って前記ＮＯx 浄化用の触媒コンバータ４内には
含酸素ＨＣが還元剤として導入されることとなり、従来
のものよりもＮＯx 還元作用が促進される。At this time, the oxygen in the compressed air supplied from the air compressor 10 is mixed into the HC, and the HC containing a considerable amount of oxygen is supplied from the fuel reformer 5 to the catalytic converter for purifying the exhaust gas. 4 into the exhaust gas line 3. Therefore, oxygen-containing HC is introduced as a reducing agent into the catalytic converter 4 for purifying NO x, and the NO x reducing action is promoted more than the conventional one.
【００２３】尚、前記第１実施例においては、エンジン
により駆動される空気圧縮機により圧縮空気を得ている
が、例えばモーター駆動のようなエンジンとは別置きの
独立型空気圧縮機でもよいのは勿論である。In the first embodiment, compressed air is obtained by an air compressor driven by an engine. However, for example, a stand-alone air compressor separate from the engine such as a motor drive may be used. Of course.
【００２４】図２に示す第２実施例において、２１は排
気管路３から分岐して燃料改質装置５に接続される排気
抽出管、２２は該排気抽出管路２１を開閉する開閉弁で
ある。In the second embodiment shown in FIG. 2, reference numeral 21 denotes an exhaust extraction pipe branched from the exhaust pipe 3 and connected to the fuel reformer 5, and reference numeral 22 denotes an on-off valve for opening and closing the exhaust extraction pipe 21. is there.
【００２５】この実施例の場合は、前記第１実施例の圧
縮空気に代えて、排気ガスの一部を抽気して燃料改質装
置５に導き、排気ガス中の残存酸素をＨＣに混入させて
含酸素ＨＣとしＮＯx 還元作用を促進させる。この場合
は、排気ガス自体が高温、高圧であるので、触媒の加熱
作用をなし、ヒータの消費電力を低減できるという効果
を有する。その他の構成、機能は前記第１実施例と同様
であり、同一の部材には同一の符号を付して示す。In this embodiment, instead of the compressed air of the first embodiment, a part of the exhaust gas is extracted and led to the fuel reformer 5, and the remaining oxygen in the exhaust gas is mixed with HC. to promote the NO x reduction effect as the oxygen-containing HC Te. In this case, since the exhaust gas itself has a high temperature and a high pressure, the catalyst has a heating effect and the power consumption of the heater can be reduced. Other configurations and functions are the same as those of the first embodiment, and the same members are denoted by the same reference numerals.
【００２６】[0026]
【発明の効果】本発明は以上のように構成されており、
本発明によれば、燃料改質装置内に圧縮空気又は排気ガ
スの一部を注入することにより、含酸素の炭化水素を得
ることができ、これをＮＯx 浄化触媒コンバータに供給
することにより、従来のものよりもＮＯx 還元作用を促
進することができる。The present invention is configured as described above.
According to the present invention, by injecting a portion of the compressed air or exhaust gas to the fuel reformer in the apparatus, it is possible to obtain the hydrocarbon oxygenates, by supplying it to the NO x purification catalytic converter, it is possible to promote the NO x reduction effect than the prior art.
【００２７】また、排気ガスの一部を利用する場合は、
該排気ガスの加熱作用により燃料改質装置内のヒータの
消費電力を低減することができる。等の種々の著効を有
す。Further, when a part of the exhaust gas is used,
The power consumption of the heater in the fuel reformer can be reduced by the heating action of the exhaust gas. And so on.
【図１】本発明の第１実施例を示す系統図。FIG. 1 is a system diagram showing a first embodiment of the present invention.
【図２】本発明の第２実施例を示す系統図。FIG. 2 is a system diagram showing a second embodiment of the present invention.
【図３】従来例を示す図１応当図。FIG. 3 is a diagram showing a conventional example.
【図４】ＮＯx 還元用触媒コンバータの性能説明用線
図。FIG. 4 is a diagram for explaining the performance of a catalytic converter for NO x reduction.
【図５】ＮＯx 還元用触媒コンバータの性能説明用線
図。FIG. 5 is a diagram for explaining the performance of a catalytic converter for NO x reduction.
１ ディーゼルエンジン ２ 排気マニホールド ３ 排気管 ４ 排気ガス浄化用触媒コンバータ ５ 燃料改質装置 ６ 燃料タンク ８ ＨＣ供給管 １０ 空気圧縮機 １２ 空気管 ２１ 排気抽出管 DESCRIPTION OF SYMBOLS 1 Diesel engine 2 Exhaust manifold 3 Exhaust pipe 4 Exhaust gas purifying catalytic converter 5 Fuel reformer 6 Fuel tank 8 HC supply pipe 10 Air compressor 12 Air pipe 21 Exhaust extraction pipe
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−19317（ＪＰ，Ａ) 特開 平６−137135（ＪＰ，Ａ) 特開 平４−214918（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) F01N 3/08 F02M 27/02────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-19317 (JP, A) JP-A-6-137135 (JP, A) JP-A-4-214918 (JP, A) (58) Field (Int.Cl. 6 , DB name) F01N 3/08 F02M 27/02
Claims (2)
される排気ガス中の窒素酸化物（ＮＯx ）を除去する排
気ガス浄化用触媒コンバータと、燃料改質触媒を介して
燃料を加熱、分解し、炭化水素（ＨＣ）を生成する燃料
改質装置と、該燃料改質装置で生成されたＨＣを前記触
媒コンバータの排気ガス入口の上流側に注入するＨＣ供
給管路とを備えた排気ガス浄化装置において、圧縮空気
を生成する空気圧縮機と、該空気圧縮機と前記燃料改質
装置とを接続し、圧縮空気を燃料改質装置内に供給する
空気管路とを備えた事を特徴とする排気ガス浄化装置。An exhaust gas purifying catalytic converter for removing nitrogen oxides (NO x ) in exhaust gas discharged from a prime mover such as a diesel engine and a fuel reforming catalyst for heating and decomposing fuel, An exhaust gas purifying apparatus comprising: a fuel reforming device that generates hydrocarbons (HC); and an HC supply pipe that injects the HC generated by the fuel reforming device upstream of an exhaust gas inlet of the catalytic converter. Wherein an air compressor for generating compressed air, and an air pipe connecting the air compressor and the fuel reformer and supplying compressed air into the fuel reformer are provided. Exhaust gas purification device.
される排気ガス中の窒素酸化物（ＮＯx ）を除去する排
気ガス浄化用触媒コンバータと、燃料改質触媒を介して
燃料を加熱、分解して炭化水素（ＨＣ）を生成する燃料
改質装置と、該燃料改質装置で生成されたＨＣを前記触
媒コンバータの排気ガス入口の上流側に注入するＨＣ供
給管路とを備えた排気ガス浄化装置において、前記原動
機からの排気管路から分岐されて前記燃料改質装置に接
続され、排気ガスの一部を前記燃料改質装置内に供給す
る排気抽出管を備えたことを特徴とする排気ガス浄化装
置。2. An exhaust gas purifying catalytic converter for removing nitrogen oxides (NO x ) in exhaust gas discharged from a prime mover such as a diesel engine and a fuel reforming catalyst for heating and decomposing fuel. An exhaust gas purifying apparatus comprising: a fuel reforming device that generates hydrocarbons (HC); and an HC supply line that injects the HC generated by the fuel reforming device upstream of an exhaust gas inlet of the catalytic converter. in the branches from the exhaust pipe from the engine is connected to the fuel reformer, the exhaust gas, wherein a part of the exhaust gas with an exhaust extraction pipe for supplying the fuel reformer in the apparatus Purification device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5022151A JP2850689B2 (en) | 1993-01-14 | 1993-01-14 | Exhaust gas purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5022151A JP2850689B2 (en) | 1993-01-14 | 1993-01-14 | Exhaust gas purification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06212952A JPH06212952A (en) | 1994-08-02 |
| JP2850689B2 true JP2850689B2 (en) | 1999-01-27 |
Family
ID=12074857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5022151A Expired - Fee Related JP2850689B2 (en) | 1993-01-14 | 1993-01-14 | Exhaust gas purification device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2850689B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3565035B2 (en) | 1998-07-10 | 2004-09-15 | 三菱ふそうトラック・バス株式会社 | NOx reduction system for combustion exhaust gas |
| US6176078B1 (en) * | 1998-11-13 | 2001-01-23 | Engelhard Corporation | Plasma fuel processing for NOx control of lean burn engines |
| WO2001034950A1 (en) * | 1999-11-10 | 2001-05-17 | Engelhard Corporation | METHOD AND APPARATUS TO PROVIDE REDUCTANT FOR NO¿x? |
| JP5030343B2 (en) * | 2001-08-31 | 2012-09-19 | 三菱重工業株式会社 | Exhaust gas purification apparatus and exhaust gas treatment method |
| JP3945335B2 (en) * | 2002-07-31 | 2007-07-18 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| DE602004003215T2 (en) * | 2004-02-19 | 2007-09-27 | General Motors Corp., Detroit | Extremely low power plasma reactor system for automotive nitrogen oxide emissions monitoring |
| US7879295B2 (en) | 2005-06-30 | 2011-02-01 | General Electric Company | Conversion system for reducing NOx emissions |
| KR100782134B1 (en) * | 2007-01-03 | 2007-12-05 | 한국에너지기술연구원 | Fuel and air feeding device for hydrocarbon reforming/combustion |
| US20100251700A1 (en) * | 2009-04-02 | 2010-10-07 | Basf Catalysts Llc | HC-SCR System for Lean Burn Engines |
-
1993
- 1993-01-14 JP JP5022151A patent/JP2850689B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06212952A (en) | 1994-08-02 |
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