JPS59150918A - Exhaust gas purification device for diesel engine - Google Patents

Exhaust gas purification device for diesel engine

Info

Publication number
JPS59150918A
JPS59150918A JP58022727A JP2272783A JPS59150918A JP S59150918 A JPS59150918 A JP S59150918A JP 58022727 A JP58022727 A JP 58022727A JP 2272783 A JP2272783 A JP 2272783A JP S59150918 A JPS59150918 A JP S59150918A
Authority
JP
Japan
Prior art keywords
filter
exhaust gas
gas
carbon
burnt
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
Application number
JP58022727A
Other languages
Japanese (ja)
Inventor
Kazumi Iwai
岩井　一躬
Shozo Yanagisawa
柳沢　省三
Toshibumi Usui
俊文 臼井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP58022727A priority Critical patent/JPS59150918A/en
Publication of JPS59150918A publication Critical patent/JPS59150918A/en
Pending legal-status Critical Current

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
    • F01N3/24—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
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion

Abstract

PURPOSE:To provide a diesel exhaust purification device having a better regeneration efficiency by continuously removing soot contained in the burnt gas so that clean and high temperature gas is supplied to the high temperature resistant filter. CONSTITUTION:Carbon particles contained in the exhaust gas from an engine E pass through a thermal catalytic filter 1 having a relatively small clogging, and flow into a downstream filter 2 with carbon particles left behind which are large enough to be trapped by the thermal catalyst. The downstream filter 2 traps fine particles which have passed through the upstream thermal catalytic filter. When the downstream filter 2 is detected to be clogged, a burner 3 is ignited to reactivate the filter. The combustible gas generated by the burner contains soft carbon. The soft carbon and larger carbon particles which are trapped by the thermal catalytic filter 1 are first burnt, and then the fine particles are burnt in the downstream filter 2.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明はディーゼルエンジンからの排気ガス中に含まれ
るカーボン等の可燃性微粒子を捕集除去するための装置
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a device for collecting and removing combustible particulates such as carbon contained in exhaust gas from a diesel engine.

〔発明の背景〕[Background of the invention]

ディーゼル機関の排気ガス中に含まれるカーボン粒子を
処理するために、排気系の中にカーボン粒子を捕集する
フィルタを設け、そのフィルタに高温の燃焼ガスヲ遡し
、上記微粒子を除去している。しかしながら、従来の構
成ではパフすの燃焼〜ガスを直接フィルタに通すため、
燃焼カス中に多量に含まれるソフトカーボンがフィルタ
に付着することになり、フィルタの再生効率を悪くして
いる。In order to treat carbon particles contained in the exhaust gas of a diesel engine, a filter for collecting carbon particles is provided in the exhaust system, and high-temperature combustion gas is passed back through the filter to remove the fine particles. However, in the conventional configuration, the combustion gas of the puff passes directly through the filter,
A large amount of soft carbon contained in the combustion residue adheres to the filter, reducing the regeneration efficiency of the filter.

〔発明の目的〕[Purpose of the invention]

従って本発明の目的は燃焼ガス中に含まれるススをフィ
ルタ通過以前で除去し、再生効率の良好なディーゼル排
気浄化システムを提供することにある。Therefore, an object of the present invention is to provide a diesel exhaust purification system that removes soot contained in combustion gas before it passes through a filter and has good regeneration efficiency.

〔発明の概要〕[Summary of the invention]

上記目的を達成するために、燃焼ガス中に含まれるスス
を、連続的に取シ除き、クリーンな高温ガスを高温耐熱
フィルタに供給するようにしたものである。このために
、ススを除去するための熱触媒を高温耐熱フィルタ上流
に設け、ディーゼル排気微粒子を二つのフィルターで除
去するように構成したものである。In order to achieve the above object, the soot contained in the combustion gas is continuously removed and clean high temperature gas is supplied to the high temperature heat resistant filter. For this purpose, a thermal catalyst for removing soot is provided upstream of the high-temperature heat-resistant filter, and diesel exhaust particulates are removed by two filters.

〔発明の実施例〕[Embodiments of the invention]

以下本発明の一実施例を図で説明する０図において、Ｅ
はエンジン、１は熱触媒、２はフ熱触媒はエンジン排ガ
ス通路４内に置く方法と、エンジン排ガス通路内には置
かず、バーナから発生する、ススを除去するだけに使わ
れる構成も可能である。In the following figure 0, which explains one embodiment of the present invention with figures, E
1 is the engine, 1 is the thermal catalyst, and 2 is the thermal catalyst.The thermal catalyst can be placed in the engine exhaust gas passage 4, or it can be used only to remove soot generated from the burner without being placed in the engine exhaust gas passage. be.

次にその作用について説明する。エンジンから排出され
るガス中に含まれるカーボン微粒子は比較的圧損の小さ
い熱触媒フィルタを通過し、途中、この熱触媒に捕集さ
れる程度に大きいカーボン粒子を残し下流のフィルタに
流れる。下流のフィルタでは、上流の熱触媒フィルタで
通過した非常に細い微粒子が捕集される。下流のフィル
タが詰まつたことが検出されると、フィルタ再生のため
にバーナに着火される。バーナから生成される燃焼ガス
中にはソフトカーボンが含まれている。この燃焼ガスを
熱触媒フィルタを通過させることによって、フィルタを
高温に保ち、ここに補集されたバーナから発生するソフ
トカーボンと概、に捕集されているエンジンから排出さ
れた粒径の大きいカーボンを燃焼することが出来る。即
ちこの熱触媒を通過した後の高温燃焼ガスはソフトカー
ボンを含まないクリーンガスとなる。このクリーンガス
によって下流に置かれたフィルタに捕集された微粒子を
燃焼する。Next, its effect will be explained. The carbon particles contained in the gas exhausted from the engine pass through a thermal catalyst filter with a relatively small pressure drop, leaving carbon particles large enough to be captured by the thermal catalyst on the way and flowing to the downstream filter. The downstream filter collects the very fine particles that passed through the upstream thermal catalytic filter. When a clogged downstream filter is detected, a burner is ignited to regenerate the filter. Soft carbon is contained in the combustion gas generated from the burner. By passing this combustion gas through a thermal catalyst filter, the filter is kept at a high temperature.Soft carbon generated from the burner is collected here, and large particle size carbon emitted from the engine is collected here. can be burned. That is, the high-temperature combustion gas after passing through this thermal catalyst becomes clean gas that does not contain soft carbon. This clean gas burns the particulates collected by the filter placed downstream.

〔発明の効果〕〔Effect of the invention〕

以上述べた如く、本発明はバーナから排出されるソフト
カーボンを除去し、クリーンガスをフィルタに供給する
ように構成したものであシ、フィルタの再生を効率良く
行うことが出来る。As described above, the present invention is configured to remove soft carbon discharged from the burner and supply clean gas to the filter, and can efficiently regenerate the filter.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明の一実施例に係る熱触媒フィルタを備えたデ
ィーゼルエンジンの排気ガス浄化システムを示す説明図
である。 Ｅ・・・ディーゼルエンジン、３・・・バーナ、４・・
・エンジン排気通路、１・・・熱触媒、２・・・高温耐
熱フィルター。FIG. 1 is an explanatory diagram showing an exhaust gas purification system for a diesel engine equipped with a thermal catalyst filter according to an embodiment of the present invention. E...Diesel engine, 3...Burner, 4...
・Engine exhaust passage, 1... thermal catalyst, 2... high temperature heat resistant filter.

Claims (1)

【特許請求の範囲】[Claims] ディーゼルエンジンから排出されるカーボン微粒子を高
温耐熱フィルタに捕集し、それを燃焼して排ガスを浄化
するシステムにおいて、微粒子を捕集するフィルタを２
段で構成し、１段目には熱触媒フィルタを用い、２段目
には前記１段目の熱触媒フィルタよシさらに流路抵抗の
大きい高温耐熱フィルタを設け、第１段フィルタではデ
ィーゼル排気微粒子を燃焼除去しながら、燃焼器から発
生するすすを除去し、第２段目フィルタにはクリーンな
高温ガスを供給するように構成したことを特長とするデ
ィーゼルエンジンの排気ガス浄化装置。In a system that collects carbon particulates emitted from diesel engines in a high-temperature heat-resistant filter and burns them to purify exhaust gas, two filters are used to collect particulates.
The first stage uses a thermal catalyst filter, and the second stage is equipped with a high-temperature heat-resistant filter that has a large flow resistance compared to the first stage thermal catalyst filter. An exhaust gas purification device for a diesel engine, characterized in that it is configured to remove soot generated from a combustor while burning off particulates, and supply clean high-temperature gas to a second stage filter.
JP58022727A 1983-02-16 1983-02-16 Exhaust gas purification device for diesel engine Pending JPS59150918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58022727A JPS59150918A (en) 1983-02-16 1983-02-16 Exhaust gas purification device for diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58022727A JPS59150918A (en) 1983-02-16 1983-02-16 Exhaust gas purification device for diesel engine

Publications (1)

Publication Number Publication Date
JPS59150918A true JPS59150918A (en) 1984-08-29

Family

ID=12090787

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58022727A Pending JPS59150918A (en) 1983-02-16 1983-02-16 Exhaust gas purification device for diesel engine

Country Status (1)

Country Link
JP (1) JPS59150918A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0405310A2 (en) * 1989-06-24 1991-01-02 Degussa Aktiengesellschaft Process for regenerating soot filters of diesel engines
US5243819A (en) * 1989-12-12 1993-09-14 J. Eberspacher Exhaust gas cleaning device for diesel engines
EP1353046A1 (en) * 2002-04-09 2003-10-15 Nissan Motor Co., Ltd. Apparatus and method for purifying exhaust gas in an engine
WO2006029808A1 (en) * 2004-09-17 2006-03-23 Arvinmeritor Emissions Technologies Gmbh Exhaust gas system of a motor vehicle with a diesel engine
US7340888B2 (en) * 2005-04-26 2008-03-11 Donaldson Company, Inc. Diesel particulate matter reduction system
US7434387B2 (en) * 2006-07-26 2008-10-14 Eaton Corporation Integrated DPF-reformer

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0405310A2 (en) * 1989-06-24 1991-01-02 Degussa Aktiengesellschaft Process for regenerating soot filters of diesel engines
EP0405310A3 (en) * 1989-06-24 1991-08-21 Degussa Aktiengesellschaft Process for regenerating soot filters of diesel engines
US5243819A (en) * 1989-12-12 1993-09-14 J. Eberspacher Exhaust gas cleaning device for diesel engines
EP1353046A1 (en) * 2002-04-09 2003-10-15 Nissan Motor Co., Ltd. Apparatus and method for purifying exhaust gas in an engine
WO2006029808A1 (en) * 2004-09-17 2006-03-23 Arvinmeritor Emissions Technologies Gmbh Exhaust gas system of a motor vehicle with a diesel engine
US7628008B2 (en) 2004-09-17 2009-12-08 Emcon Technologies Llc Exhaust system of a motor vehicle with a diesel engine
US7340888B2 (en) * 2005-04-26 2008-03-11 Donaldson Company, Inc. Diesel particulate matter reduction system
US7434387B2 (en) * 2006-07-26 2008-10-14 Eaton Corporation Integrated DPF-reformer

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