JP4870411B2 - フィルタ脱硫酸化システム及び方法 - Google Patents
フィルタ脱硫酸化システム及び方法 Download PDFInfo
- Publication number
- JP4870411B2 JP4870411B2 JP2005312895A JP2005312895A JP4870411B2 JP 4870411 B2 JP4870411 B2 JP 4870411B2 JP 2005312895 A JP2005312895 A JP 2005312895A JP 2005312895 A JP2005312895 A JP 2005312895A JP 4870411 B2 JP4870411 B2 JP 4870411B2
- Authority
- JP
- Japan
- Prior art keywords
- desulfation
- temperature
- exhaust
- engine
- flow rate
- 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
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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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
-
- 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
- F01N3/031—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 having means for by-passing filters, e.g. when clogged or during cold engine start
-
- 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
- F01N3/033—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 in combination with other devices
- F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
-
- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
- F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
-
- 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
-
- 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
-
- 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
- F01N2610/08—Adding substances to exhaust gases with prior mixing of the substances with a gas, e.g. air
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
1)NOx吸着装置30は、約500℃〜約800℃の範囲内の温度にさらされなければならないこと、および
2)空気対燃料の正規化した比(ラムダ)が1未満でなければならないこと。
例えば、試験を通じて、約0.9の触媒ラムダ(噴射器26の下流側で測定される)、および約750℃の脱硫酸化温度が、NOx吸着装置30を効果的に脱着させ得ることが確定されている。NOx吸着装置温度を上げる第1の条件に関して、これは、NOx吸着装置30の上流側に配置される酸化触媒28全体に発熱反応を引き起こすことによって達成される。かかる発熱反応は、2つの条件を必要とする:
1)酸化触媒28を約250℃の活性化温度に加熱すること、および
2)酸素の存在下にその中に配置されている金属を還元体にさらすこと。
1未満のラムダを維持する第2の条件(濃厚な排気環境)に関して、これは、NOx吸着装置30の上流側で還元体を、空気対燃料の所望の比に到達するまで単に噴射することによって達成することができる。還元体の噴射が排気流れを希薄から濃厚へ移行させるので、脱硫酸化の間、少なくとも排気流速を還元体流速と連動して変化させることによって、所望のラムダおよび所望の脱硫酸化温度の両方を実質的に一定に保持することができる。したがって、還元体を噴射したこと(それによって1未満の触媒ラムダが達成される)に原因があると考えられる温度上昇は、脱硫酸化の間の脱硫酸化区間を経由する排気流速を低下させることによって相殺することができる。
12 フィルタシステム
14 エンジン排気マニホルド
16 第1の区間
18 制御装置
20 通信回線
22 第2の区間
24 弁機構
25 酸素抽気組立体
26 ノズル
27 発火源
28 酸化触媒
30 NOx吸着装置
32 センサ
34 エンジン・センサ
36 工程−データ収集
38 工程−脱硫酸化が必要かどうかの判断
40 工程−所望の活性化温度まで酸化触媒を加熱
42 工程−所望の脱硫酸化温度までNOx吸着装置を加熱
44 工程−所望の触媒ラムダを達成
46 工程−データ収集
48 工程−エンジン外ラムダ、還元体流速、および/または排気流速の修正
50 工程−脱硫酸化が完了したかどうかの判断
52 工程−NOx吸着装置の冷却
Claims (4)
- 脱硫酸化の間、排気流れをフィルタシステムの脱硫酸化区間を経由して連続的に通過させる工程と、
排気流れの少なくとも1つの特性を検知する工程と、
排気流れの中に還元体の流れを入れる工程と、
脱硫酸化の間、前記検知に応答して、所望の脱硫酸化温度が実質的に一定に維持されるように排気流れの流速を修正する工程と、
を含み、前記流速を修正する工程は、弁機構によって排気流れの流速を制限することにより、前記脱硫酸化区間の上流側に存在する酸化触媒による還元体の酸化を増大させる工程を含み、前記弁機構は前記酸化触媒よりも上流側に設けられる、エンジンのフィルタシステムから硫黄を除去する方法。 - 脱硫酸化の間、所望の触媒ラムダを維持する工程をさらに含む、請求項1に記載の方法。
- NOx吸着装置を所望の温度まで加熱する工程と、
NOx吸着装置の上流側の排気流れの中に還元体を噴射する工程と、
脱硫酸化の間、前記排気流れの流速を修正することによって、所望の温度を実質的に一定に保持する工程と、
を含み、前記所定温度を一定に保持する工程は、弁機構によって排気流れの流速を制限することにより、前記NOx吸着装置の上流側に存在する酸化触媒による還元体の酸化を増大させる工程を含み、前記弁機構は前記酸化触媒よりも上流側に設けられる、エンジン・フィルタシステムのNOx吸着装置から硫黄を除去する方法。 - 第1の区間および
第2の区間を含み、
これらの区間のうちの少なくとも1つが、排気流れの一部をエンジンからそれぞれの区間を経由して導くように構成された弁機構を含み、
前記弁機構が、脱硫酸化の間、検出された温度に応答して、所望の脱硫酸化温度が実質的に一定に維持されるように前記排気流れの一部の流速を修正し、前記弁機構による流速の修正には、排気流れの流速を制限することにより、排気流れの中に噴射された還元体の酸化触媒による酸化を増大させることが含まれ、前記弁機構は前記酸化触媒よりも上流側に設けられる、脱硫酸化機能を有するフィルタシステム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/022,692 US7770386B2 (en) | 2004-12-28 | 2004-12-28 | Filter desulfation system and method |
US11/022,692 | 2004-12-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2006189033A JP2006189033A (ja) | 2006-07-20 |
JP2006189033A5 JP2006189033A5 (ja) | 2009-02-26 |
JP4870411B2 true JP4870411B2 (ja) | 2012-02-08 |
Family
ID=36590675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005312895A Expired - Fee Related JP4870411B2 (ja) | 2004-12-28 | 2005-10-27 | フィルタ脱硫酸化システム及び方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7770386B2 (ja) |
JP (1) | JP4870411B2 (ja) |
DE (1) | DE102005040886A1 (ja) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7410530B2 (en) * | 2005-03-04 | 2008-08-12 | Donaldson Company, Inc. | Apparatus for cleaning exhaust aftertreatment devices and methods |
JP4417878B2 (ja) * | 2005-05-16 | 2010-02-17 | いすゞ自動車株式会社 | 排気ガス浄化方法及び排気ガス浄化システム |
US7155334B1 (en) * | 2005-09-29 | 2006-12-26 | Honeywell International Inc. | Use of sensors in a state observer for a diesel engine |
JP4148254B2 (ja) * | 2005-10-18 | 2008-09-10 | トヨタ自動車株式会社 | 内燃機関の排気浄化システム及び、排気浄化装置の浄化能力の再生方法。 |
DE102006025050B4 (de) * | 2006-05-27 | 2014-04-03 | Fev Gmbh | Verfahren und Vorrichtung zum Betrieb einer Abgasnachbehandlungsanlage |
US8117832B2 (en) | 2006-06-19 | 2012-02-21 | Donaldson Company, Inc. | Exhaust treatment device with electric regeneration system |
US20090025655A1 (en) * | 2006-07-04 | 2009-01-29 | Miura Co., Ltd. | Boiler |
US20080141662A1 (en) * | 2006-12-14 | 2008-06-19 | Markus Schuster | Fluid injecting and mixing systems for exhaust after-treatment devices |
US20080173007A1 (en) * | 2007-01-22 | 2008-07-24 | Imes Julian A | System for reducing emissions generated from diesel engines used in low temperature exhaust applications |
US8256060B2 (en) * | 2007-01-30 | 2012-09-04 | Donaldson Company, Inc. | Apparatus for cleaning exhaust aftertreatment devices and methods |
JP2008253976A (ja) * | 2007-03-15 | 2008-10-23 | Miura Co Ltd | 触媒劣化防止装置および低NOx燃焼装置 |
JP4780054B2 (ja) * | 2007-07-27 | 2011-09-28 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP5067614B2 (ja) * | 2007-08-21 | 2012-11-07 | 株式会社デンソー | 内燃機関の排気浄化装置 |
US8091337B2 (en) * | 2008-02-29 | 2012-01-10 | Corning Incorporated | Exhaust treatment device having a reactive compound and conditioning the device via endothermic reaction |
US8776502B2 (en) | 2008-07-03 | 2014-07-15 | Donaldson Company, Inc. | System and method for regenerating an auxiliary power unit exhaust filter |
US20100037423A1 (en) * | 2008-07-10 | 2010-02-18 | Herman John T | Apparatus for Cleaning Exhaust Aftertreatment Devices and Methods |
US8844270B2 (en) * | 2009-01-16 | 2014-09-30 | Donaldson Company, Inc. | Diesel particulate filter regeneration system including shore station |
US9151202B2 (en) * | 2010-10-13 | 2015-10-06 | Cummins Intellectual Property, Inc. | Multi-leg exhaust aftertreatment system and method |
GB201519926D0 (en) * | 2015-11-11 | 2015-12-23 | Horiba Mira Ltd | Emmissions testing system |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5715677A (en) * | 1996-11-13 | 1998-02-10 | The Regents Of The University Of California | Diesel NOx reduction by plasma-regenerated absorbend beds |
JP3645704B2 (ja) * | 1997-03-04 | 2005-05-11 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
US5983627A (en) * | 1997-09-02 | 1999-11-16 | Ford Global Technologies, Inc. | Closed loop control for desulfating a NOx trap |
DE19842625C2 (de) * | 1998-09-17 | 2003-03-27 | Daimler Chrysler Ag | Verfahren zum Betrieb einer Verbrennungsmotoranlage mit schwefelanreichernder Abgasreinigungskomponente und damit betreibbare Verbrennungsmotoranlage |
US6189316B1 (en) * | 1999-05-19 | 2001-02-20 | Ford Global Technologies, Inc. | Emission device temperature control system |
US6699448B2 (en) * | 2001-01-26 | 2004-03-02 | Engelhard Corporation | SOx tolerant NOx trap catalysts and methods of making and using the same |
JP3899884B2 (ja) * | 2001-10-04 | 2007-03-28 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
DE60225321T2 (de) * | 2001-12-03 | 2009-02-26 | Eaton Corp., Cleveland | System und verfahren zur verbesserten emissionskontrolle von brennkraftmaschinen |
US20030113242A1 (en) * | 2001-12-18 | 2003-06-19 | Hepburn Jeffrey Scott | Emission control device for an engine |
US6651618B1 (en) * | 2002-05-14 | 2003-11-25 | Caterpillar Inc | Air and fuel supply system for combustion engine |
JP2004068700A (ja) * | 2002-08-06 | 2004-03-04 | Toyota Motor Corp | 排気ガス浄化方法 |
CA2453689A1 (en) * | 2003-03-14 | 2004-09-14 | Westport Research Inc. | Management of thermal fluctuations in lean nox adsorber aftertreatment systems |
US6779339B1 (en) * | 2003-05-02 | 2004-08-24 | The United States Of America As Represented By The Environmental Protection Agency | Method for NOx adsorber desulfation in a multi-path exhaust system |
-
2004
- 2004-12-28 US US11/022,692 patent/US7770386B2/en not_active Expired - Fee Related
-
2005
- 2005-08-29 DE DE102005040886A patent/DE102005040886A1/de not_active Withdrawn
- 2005-10-27 JP JP2005312895A patent/JP4870411B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE102005040886A1 (de) | 2006-07-06 |
US20060137329A1 (en) | 2006-06-29 |
JP2006189033A (ja) | 2006-07-20 |
US7770386B2 (en) | 2010-08-10 |
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