JP3402505B2 - Fuel reformer - Google Patents
Fuel reformerInfo
- Publication number
- JP3402505B2 JP3402505B2 JP00864494A JP864494A JP3402505B2 JP 3402505 B2 JP3402505 B2 JP 3402505B2 JP 00864494 A JP00864494 A JP 00864494A JP 864494 A JP864494 A JP 864494A JP 3402505 B2 JP3402505 B2 JP 3402505B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- gas
- reducing agent
- engine
- component
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- 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
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、ディーゼルエンジンエ
ンジンの排気中の窒素酸化物（以下、ＮＯXという）を
燃料改質還元剤を用いて浄化する燃料改質装置に関す
る。
【０００２】
【従来の技術】ディーゼルエンジンにおいて、ＮＯX を
排気系内で触媒を使って浄化するためには、還元剤が必
要である。現在、還元剤としてアンモニア、アミン類を
用いるＳＣＲ法が実用化されているが、燃料とは別に還
元剤を多量に保管する必要がある。
【０００３】
【発明が解決しようとする課題】一方、近年、ディーゼ
ルエンジンのように排気ガスが酸化雰囲気であっても炭
化水素共存下でＮＯX の浄化が可能であることが発見さ
れているが、ガソリンリーンバーンでは、排出未燃焼炭
化水素が多いことからこの炭化水素を利用できるが、デ
ィーゼルエンジンの場合、排出炭化水素が少ないため、
炭化水素類を何らかの手段で触媒上で富化する必要があ
る。そこで、軽油を還元剤とし触媒上に与えることが考
えられるが、軽油のように高沸点の炭化水素類では低温
活性が低く、また、与える還元剤種によりＮＯX 浄化率
も大幅に変化するという問題を有している。
【０００４】本発明は、上記問題を解決するものであっ
て、ディーゼルエンジン排気中のＮＯX 浄化率を向上さ
せるとともに、スモークの発生を低減させることができ
る燃料改質装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】そのために本発明の燃料
改質装置は、ディーゼルエンジン１の排気管３に配設さ
れる触媒床４と、前記燃料を低沸点炭化水素に分解する
燃料改質器９と、前記低沸点炭化水素をガス成分と液状
成分に分離する気液分離用熱交換器８とを備え、前記ガ
ス成分をエンジン吸気管２に導入し、液状成分を還元剤
として触媒床４に導入させることを特徴とする。なお、
上記構成に付加した番号は、理解を容易にするために図
面と対比させるためのもので、これにより本発明の構成
が何ら限定されるものではない。
【０００６】
【作用】本発明においては、軽油等の高沸点炭化水素を
酸化分解し、低沸点炭化水素を得、得られた低沸点炭化
水素をガス成分と液状成分に分離し、ガス成分はエンジ
ン吸気に混合して燃焼させ、液状成分は還元剤として触
媒床に導入させる。
【０００７】
【実施例】以下本発明の実施例を図面を参照しつつ説明
する。図１は本発明の燃料改質装置の１実施例を示す構
成図である。図において、１はディーゼルエンジン、２
は吸気管、３は排気管、４は触媒床、５は燃料タンク、
６は還元剤タンク、７は流量制御弁、８は気液分離用熱
交換器、９は燃料改質器、１０は開閉弁、１１はガス供
給用ポンプ、１２は空気供給用ポンプ、１３は還元剤用
ポンプ、１４は燃料ポンプ、１５はオーバーフロー用ポ
ンプである。
【０００８】燃料改質器９は、断熱材１６およびヒータ
１７を備えるケース１８と、ケース１８内に形成される
改質槽１９と、改質槽１９内に配設される触媒層２０、
攪拌部材２１、気泡発生器２２、温度検出器２３、モー
タ２４とを備えている。
【０００９】上記構成からなる本発明の作用について説
明する。燃料タンク５の軽油燃料は、燃料ポンプ１４に
より気液分離用熱交換器８を通って改質槽１９内に供給
される。また、空気は空気供給用ポンプ１２により気液
分離用熱交換器８を通って気泡発生器２２から改質槽１
９内に気泡となって噴出される。改質槽１９はヒータ１
７により３００〜４００℃に加熱され、燃料と空気は攪
拌部材２１により攪拌混合されながら、触媒層２０を通
過する。この触媒層２０において、軽油等の高沸点炭化
水素が酸化分解され、液体低沸点炭化水素（炭素数２〜
１０程度）が得られる。得られた液体低沸点炭化水素
は、気液分離用熱交換器８において、燃料および空気に
より冷却され、ガス成分と液状成分に分離され、ガス成
分（主にメタン）はガス供給用ポンプ１１により吸気管
２に供給され、エンジン吸気に混合して燃焼させスモー
クの排出を抑制する。
【００１０】一方、液状成分は還元剤用ポンプ１３によ
り還元剤タンク６に送られる。還元剤タンク６からの還
元剤は、流量制御弁７の制御により排気管３の触媒床４
の上流側に噴霧され、触媒床４において、排ガス中のＮ
ＯX が選択的に還元される。この噴霧量は、図示しない
電子制御装置において、エンジン回転数、エンジン負荷
および排気ガス温度の検出信号から、エンジン排気中の
ＮＯX の排出量および濃度を演算し、これによりＮＯX
を最も浄化する還元剤量として決定される。
【００１１】なお、本発明は上記実施例に限定されるも
のではなく種々の変更が可能である。例えば、上記実施
例においては、気液分離用熱交換器８において改質成分
を燃料と空気により冷却しているが、エンジン冷却水を
用いるようにしてもよい。また、空気および燃料を改質
成分により加熱しているが、エンジン排気熱を用いるよ
うにしてもよい。
【００１２】
【発明の効果】以上の説明から明らかなように本発明に
よれば、ディーゼルエンジン排気中のＮＯX 浄化率を向
上させるとともに、スモークの発生を低減させることが
できる。BACKGROUND OF THE INVENTION [0001] Field of the Invention The present invention, nitrogen oxides in the exhaust of a diesel engine the engine (hereinafter, referred to as NO X) fuels the purifying using fuel reforming reducing agent It relates to a reformer. [0002] In diesel engines, in order to purify using a catalyst the NO X in the exhaust system, it is necessary reducing agent. At present, the SCR method using ammonia and amines as a reducing agent has been put to practical use, but it is necessary to store a large amount of the reducing agent separately from the fuel. [0003] On the other hand, it has recently been discovered that NO X can be purified in the presence of hydrocarbons even in an oxidizing atmosphere of an exhaust gas such as a diesel engine. , Gasoline-lean burns can use this hydrocarbon because it emits a lot of unburned hydrocarbons, but diesel engines emit less hydrocarbons,
The hydrocarbons need to be enriched on the catalyst by some means. Therefore, as it is conceivable to provide on the catalyst and diesel oil with a reducing agent, a low low-temperature activity is high boiling hydrocarbons as gas oil, also NO X purification rate by the reducing agent species giving change significantly Have a problem. [0004] The present invention has been made to solve the above problems, aims to provide improves the NO X purification rate in diesel engine exhaust, the fuel reforming apparatus that can reduce the production of smoke And [0005] For this purpose, a fuel reforming apparatus according to the present invention decomposes a catalyst bed 4 disposed in an exhaust pipe 3 of a diesel engine 1 and low-boiling hydrocarbons. A gas-liquid separation heat exchanger for separating the low-boiling hydrocarbon into a gas component and a liquid component; introducing the gas component into the engine intake pipe 2; Is introduced into the catalyst bed 4. In addition,
The numbers added to the above configuration are for comparison with the drawings for easy understanding, and do not limit the configuration of the present invention at all. In the present invention, high boiling hydrocarbons such as gas oil are oxidatively decomposed to obtain low boiling hydrocarbons, and the obtained low boiling hydrocarbons are separated into gas components and liquid components. The fuel is mixed with the intake air of the engine and burned, and the liquid component is introduced into the catalyst bed as a reducing agent. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of the fuel reforming apparatus of the present invention. In the figure, 1 is a diesel engine, 2
Is an intake pipe, 3 is an exhaust pipe, 4 is a catalyst bed, 5 is a fuel tank,
6 is a reducing agent tank, 7 is a flow control valve, 8 is a gas-liquid separation heat exchanger, 9 is a fuel reformer, 10 is an on-off valve, 11 is a gas supply pump, 12 is an air supply pump, and 13 is A reducing agent pump, 14 is a fuel pump, and 15 is an overflow pump. The fuel reformer 9 includes a case 18 having a heat insulating material 16 and a heater 17, a reforming tank 19 formed in the case 18, a catalyst layer 20 disposed in the reforming tank 19,
A stirring member 21, a bubble generator 22, a temperature detector 23, and a motor 24 are provided. The operation of the present invention having the above configuration will be described. The light oil fuel in the fuel tank 5 is supplied into the reforming tank 19 through the gas-liquid separation heat exchanger 8 by the fuel pump 14. In addition, the air passes through the gas-liquid separation heat exchanger 8 by the air supply pump 12 and is transferred from the bubble generator 22 to the reforming tank 1.
It is jetted out as a bubble in 9. The reforming tank 19 includes the heater 1
7, the fuel and air pass through the catalyst layer 20 while being stirred and mixed by the stirring member 21. In the catalyst layer 20, high-boiling hydrocarbons such as light oil are oxidatively decomposed to form liquid low-boiling hydrocarbons (having 2 to 2 carbon atoms).
10). The obtained liquid low-boiling hydrocarbon is cooled by fuel and air in a gas-liquid separation heat exchanger 8 to be separated into a gas component and a liquid component, and the gas component (mainly methane) is separated by a gas supply pump 11. It is supplied to the intake pipe 2 and mixed with the engine intake to burn and suppress the emission of smoke. On the other hand, the liquid component is sent to the reducing agent tank 6 by the reducing agent pump 13. The reducing agent from the reducing agent tank 6 is supplied to the catalyst bed 4 of the exhaust pipe 3 by the control of the flow control valve 7.
Is sprayed on the upstream side of
O X is selectively reduced. The spraying amount is an electronic control unit (not shown), the engine speed, from the detection signal of the engine load and exhaust gas temperature, and calculates the emissions and the concentration of the NO X in the engine exhaust, thereby NO X
Is determined as the amount of the reducing agent that purifies the most. It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above embodiment, the reforming component is cooled by the fuel and air in the gas-liquid separation heat exchanger 8, but engine cooling water may be used. Although the air and the fuel are heated by the reforming components, the heat of the engine exhaust may be used. According to apparent the present invention from the above description, it is possible to improve the NO X purification rate in diesel engine exhaust, it is possible to reduce the generation of smoke.
【図面の簡単な説明】
【図１】本発明の燃料改質装置の１実施例を示す構成図
である。
【符号の説明】
１…ディーゼルエンジン、２…吸気管、３…排気管、４
…触媒床
５…燃料タンク、６…還元剤タンク、７…流量制御弁
８…気液分離用熱交換器、９…燃料改質器BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing one embodiment of a fuel reforming apparatus of the present invention. [Description of Signs] 1 ... Diesel engine, 2 ... Intake pipe, 3 ... Exhaust pipe, 4
... Catalyst bed 5 ... Fuel tank, 6 ... Reducing agent tank, 7 ... Flow control valve 8 ... Heat exchanger for gas-liquid separation, 9 ... Fuel reformer
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F01N 3/08 F01N 3/24 F02M 27/02 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F01N 3/08 F01N 3/24 F02M 27/02
Claims (1)
触媒床と、前記燃料を低沸点炭化水素に分解する燃料改
質器と、前記低沸点炭化水素をガス成分と液状成分に分
離する気液分離用熱交換器とを備え、前記ガス成分をエ
ンジン吸気管に導入し、液状成分を還元剤として前記触
媒床に導入させることを特徴とする燃料改質装置。(57) [Claim 1] A catalyst bed disposed in an exhaust pipe of a diesel engine, a fuel reformer for decomposing the fuel into low-boiling hydrocarbons, A fuel reformer comprising: a gas-liquid separation heat exchanger that separates a gas component and a liquid component, wherein the gas component is introduced into an engine intake pipe, and the liquid component is introduced as a reducing agent into the catalyst bed. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00864494A JP3402505B2 (en) | 1994-01-28 | 1994-01-28 | Fuel reformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00864494A JP3402505B2 (en) | 1994-01-28 | 1994-01-28 | Fuel reformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07217424A JPH07217424A (en) | 1995-08-15 |
| JP3402505B2 true JP3402505B2 (en) | 2003-05-06 |
Family
ID=11698664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00864494A Expired - Fee Related JP3402505B2 (en) | 1994-01-28 | 1994-01-28 | Fuel reformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3402505B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE555297T1 (en) * | 2003-12-01 | 2012-05-15 | Shell Int Research | METHOD FOR OPERATING A SELF-IGNITION COMBUSTION ENGINE IN COMBINATION WITH A CATALYTIC REFORMER |
| EP2472079B1 (en) * | 2005-03-01 | 2014-04-09 | Saudi Arabian Oil Company | Method for partial decarbonization of hydrocarbon fuels on board combustion-based transportation vehicles to reduce co2 emissions |
| CN105715426A (en) * | 2016-04-08 | 2016-06-29 | 孟金来 | High-temperature and high-pressure catalysis and thermal decomposition fuel supply system for internal combustion engine |
| WO2024024837A1 (en) * | 2022-07-26 | 2024-02-01 | 株式会社Inpex | Method and equipment for reducing flare gas, and method and equipment for reducing disposal amount of biogas |
-
1994
- 1994-01-28 JP JP00864494A patent/JP3402505B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07217424A (en) | 1995-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Dey et al. | Automobile pollution control using catalysis | |
| US3800533A (en) | Apparatus and method for reducing harmful products of combustion | |
| JP2850547B2 (en) | Exhaust gas purification device for internal combustion engine | |
| EP1342887B1 (en) | NOx reduction system for diesel engines, using hydrogen selective catalytic reduction | |
| RU2005137871A (en) | METHOD OF REGULATION OF NSR CATALIZER ADSORBENT FOR INTERNAL COMBUSTION ENGINE, NOX REMOVAL SYSTEM IN EXHAUST GASES OF INTERNAL COMBUSTION ENGINE AND PROCESSING MODULE | |
| RU2004120435A (en) | SYSTEM AND METHODS FOR MANAGING THE CONTENT OF HARMFUL COMPONENTS IN EXHAUST GASES OF INTERNAL COMBUSTION ENGINES AND FUEL TREATMENT UNIT | |
| ATE249576T1 (en) | SELECTIVE CATALYTIC REDUCTION SYSTEM AND METHOD | |
| CN101016870A (en) | Methanol-hydrogen compounded fuel engine | |
| RU2592791C2 (en) | METHOD OF PROCESSING NOx OF EXHAUST GASES USING THREE CONSECUTIVE ZONES OF SCR CATALYSTS | |
| JP2002106338A (en) | Hydrogen contained gas producing apparatus and exhaust emission control system | |
| JP3402505B2 (en) | Fuel reformer | |
| US6014858A (en) | Apparatus and method for reducing harmful products of combustion | |
| JP2850689B2 (en) | Exhaust gas purification device | |
| JP2902166B2 (en) | Denitration equipment for internal combustion engine with exhaust supercharger | |
| KR101508731B1 (en) | Injection system of sub-redcuing agent for Exhaust After-treatment System | |
| CN1775931A (en) | Fuel combined combustion method by adding hydrogen peroxide combustion adjuvant | |
| JP2009203961A (en) | Exhaust emission control device | |
| WO2000031386A1 (en) | Method and apparatus to reduce engine exhaust emissions | |
| JP2798219B2 (en) | Denitration equipment for internal combustion engines | |
| JP2680718B2 (en) | Denitration equipment for internal combustion engines | |
| JPH05141229A (en) | Method for purifying exhaust gas of automobile engine | |
| KR960003689B1 (en) | Hydrogen gas generating apparatus | |
| JP2001140630A (en) | Exhaust emission control device for internal combustion engine | |
| JP2793415B2 (en) | NOx reduction device in engine exhaust gas | |
| US7118605B2 (en) | Fuel conditioning process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090228 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100228 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100228 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110228 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110228 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120229 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |