JP3281674B2 - Denitration equipment - Google Patents
Denitration equipmentInfo
- Publication number
- JP3281674B2 JP3281674B2 JP12785793A JP12785793A JP3281674B2 JP 3281674 B2 JP3281674 B2 JP 3281674B2 JP 12785793 A JP12785793 A JP 12785793A JP 12785793 A JP12785793 A JP 12785793A JP 3281674 B2 JP3281674 B2 JP 3281674B2
- Authority
- JP
- Japan
- Prior art keywords
- glow plug
- fuel
- exhaust
- exhaust gas
- denitration apparatus
- 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
Landscapes
- 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、ガ
スタービン等から排出される排気ガス中の窒素酸化物を
除去する脱硝装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a denitration apparatus for removing nitrogen oxides from exhaust gas discharged from a diesel engine, a gas turbine or the like.
【０００２】[0002]
【従来の技術】従来、ディーゼルエンジンから排出され
る酸素過剰の排気ガス中の窒素酸化物を除去するため、
温度300 〜400 ℃で排気ガス中の窒素酸化物とほぼ等モ
ルのアンモニア又はその誘導体を還元剤として加えた
後、これをチタニア系の還元触媒と接触させてＮ2 とＨ
2Oに転換する方法が採られている。2. Description of the Related Art Conventionally, in order to remove nitrogen oxides in an oxygen-excess exhaust gas discharged from a diesel engine,
At a temperature of 300 to 400 ° C., ammonia or a derivative thereof, which is almost equimolar to the nitrogen oxides in the exhaust gas, is added as a reducing agent, and this is brought into contact with a titania-based reduction catalyst to form N 2 and H 2.
The method of converting to 2 O is adopted.
【０００３】還元触媒として、メタロシリケート系触媒
を用いたときは、還元剤としてアンモニアの他に炭化水
素ガスも使用される。When a metallosilicate-based catalyst is used as a reducing catalyst, hydrocarbon gas is used in addition to ammonia as a reducing agent.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の脱硝装置に
おいては、還元剤として使用するアンモニア、炭化水素
ガス等をアンモニア収容タンク、炭化水素ガスボンベ等
の供給源から脱硝装置に供給するための専用の供給設備
が必要となる。In the above-mentioned conventional denitration apparatus, there is a special purpose for supplying ammonia used as a reducing agent, hydrocarbon gas or the like from a supply source such as an ammonia storage tank or a hydrocarbon gas cylinder to the denitration apparatus. Supply equipment is required.
【０００５】また、これら供給源から脱硝装置までの管
路からアンモニア等の還元剤が漏洩し、二次公害が発生
するおそれがあった。[0005] Further, a reducing agent such as ammonia leaks from a pipeline from these supply sources to a denitration apparatus, and there is a possibility that secondary pollution may occur.
【０００６】[0006]
【課題を解決するための手段】本発明は上記課題を解決
するために発明されたものであって、その要旨とすると
ころは、不飽和低級炭化水素を還元剤とするメタロシリ
ケート系等の触媒層により排気ガス中の窒素酸化物を除
去する脱硝装置において、上記触媒層の上流側の排気流
路内にグロープラグの加熱部を露出させるとともに上記
グロープラグの加熱部近傍に燃料を噴射する噴射弁を設
けたことを特徴とする脱硝装置にある。DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its gist is to provide a catalyst such as a metallosilicate catalyst using an unsaturated lower hydrocarbon as a reducing agent. In a denitration apparatus for removing nitrogen oxides in exhaust gas by a layer, an injection part for exposing a heating part of a glow plug in an exhaust flow path on an upstream side of the catalyst layer and injecting fuel near a heating part of the glow plug A denitration apparatus comprising a valve.
【０００７】上記排気ガスを排出するエンジンの回転数
を検出する回転センサーと、この回転センサーの検出信
号を受けて上記グロープラグの加熱部を加熱するととも
にその温度を制御するコントローラを設けることができ
る。It is possible to provide a rotation sensor for detecting the number of revolutions of the engine for discharging the exhaust gas, and a controller for receiving the detection signal of the rotation sensor, heating the heating section of the glow plug and controlling the temperature thereof. .
【０００８】[0008]
【作用】本発明においては、上記構成を具えているた
め、グロープラグの加熱部近傍に燃料噴射弁より燃料を
噴射すると、これは蒸発して熱分解することにより不飽
和低級炭化水素ガスとなり、還元剤として触媒層に導か
れる。According to the present invention, since the fuel injection valve is provided with the above structure, when fuel is injected from the fuel injection valve in the vicinity of the heating portion of the glow plug, the fuel is evaporated and thermally decomposed into unsaturated lower hydrocarbon gas. It is led to the catalyst layer as a reducing agent.
【０００９】回転センサーで検出されたエンジンの回転
数がコントローラに入力されると、コントローラはグロ
ープラグの加熱部を加熱するとともにその温度を制御す
る。When the rotation speed of the engine detected by the rotation sensor is input to the controller, the controller heats the heating portion of the glow plug and controls the temperature.
【００１０】[0010]
【実施例】本発明の１実施例が図１に示されている。図
１において、１はディーゼルエンジン、19はシリンダ、
２は給気マニホルド、８は排気マニホルド、７は各シリ
ンダ19内に燃料を噴射する燃料噴射弁、３は燃料噴射弁
７に高圧噴射管６を介して燃料を圧送する高圧燃料噴射
弁、５は燃料供給ポンプ、４は燃料供給ポンプ５と高圧
燃料噴射弁３とを接続する燃料供給管である。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG. In FIG. 1, 1 is a diesel engine, 19 is a cylinder,
2 is a supply manifold, 8 is an exhaust manifold, 7 is a fuel injection valve for injecting fuel into each cylinder 19, 3 is a high-pressure fuel injection valve for pumping fuel to the fuel injection valve 7 through the high-pressure injection pipe 6, and 5 Reference numeral 4 denotes a fuel supply pump, and reference numeral 4 denotes a fuel supply pipe connecting the fuel supply pump 5 and the high-pressure fuel injection valve 3.
【００１１】９は排気過給機で、排気マニホルド８から
導入された高温・高圧の排気ガスで駆動され、給気マニ
ホルド２に給気を圧送する。Reference numeral 9 denotes an exhaust supercharger, which is driven by high-temperature and high-pressure exhaust gas introduced from the exhaust manifold 8, and supplies air to the air supply manifold 2 under pressure.
【００１２】11は排気過給機９の下流の排気流路10中に
設けられた触媒層で、不飽和低級炭化水素を還元剤とす
るメタロシリケート系触媒が充填されている。12は触媒
層11の上流側の排気流路10に設置された台座で、この台
座12にはグロープラグ14及び燃料噴射弁13が装着されて
いる。Reference numeral 11 denotes a catalyst layer provided in an exhaust passage 10 downstream of the exhaust supercharger 9 and is filled with a metallosilicate catalyst using unsaturated lower hydrocarbons as a reducing agent. Reference numeral 12 denotes a pedestal provided in the exhaust passage 10 on the upstream side of the catalyst layer 11, and a glow plug 14 and a fuel injection valve 13 are mounted on the pedestal 12.
【００１３】グロープラグ14は予燃焼室式ディーゼルエ
ンジン等に用いられる公知のグロープラグで、その加熱
部が排気流路10内に露出せしめられている。The glow plug 14 is a known glow plug used for a pre-combustion chamber type diesel engine or the like, and has a heating portion exposed in the exhaust passage 10.
【００１４】燃料噴射弁13には燃料供給ポンプ５から送
出された燃料が燃料供給管４から分岐して分岐管路4aを
経て供給される。The fuel supplied from the fuel supply pump 5 branches off from the fuel supply pipe 4 and is supplied to the fuel injection valve 13 via a branch pipe 4a.
【００１５】15はコントローラで、グロープラグ14と電
線16により接続されている。17は回転センサーで、ディ
ーゼルエンジン１の回転数を検出してこれをリード線18
を介してコントローラ15に送信する。Reference numeral 15 denotes a controller, which is connected to the glow plug 14 and an electric wire 16. Reference numeral 17 denotes a rotation sensor which detects the number of rotations of the diesel engine 1 and supplies it to a lead wire 18.
To the controller 15 via
【００１６】上記のように構成された脱硝装置におい
て、ディーゼルエンジン１から排出される高温・高圧の
排気ガスは排気過給機９を流過することによって低温・
低圧の排気ガスとなって排気流路10に排出される。In the denitration apparatus configured as described above, the high-temperature and high-pressure exhaust gas discharged from the diesel engine 1 flows through the exhaust supercharger 9 to reduce the temperature and the temperature.
The exhaust gas is discharged into the exhaust passage 10 as low-pressure exhaust gas.
【００１７】回転センサー17がディーゼルエンジン１の
回転数を検出してこれをコントローラ15に入力すると、
コントローラ15はグロープラグ14に通電してその加熱部
を所定の高温に加熱する。このようにしてグロープラグ
14の加熱部分及びその近傍の排気ガスが加熱されると、
この加熱された部分にエンジン用燃料の一部が分岐管路
4aを経て燃料噴射弁13に供給され、これから微粒化され
た状態で噴射される。When the rotation sensor 17 detects the rotation speed of the diesel engine 1 and inputs it to the controller 15,
The controller 15 energizes the glow plug 14 to heat its heating part to a predetermined high temperature. Glow plug in this way
When the 14 heated parts and the exhaust gas in the vicinity are heated,
Some of the fuel for the engine is branched into this heated part.
The fuel is supplied to the fuel injection valve 13 via 4a, and is then injected in a finely divided state.
【００１８】これにより燃料は蒸発して熱分解すること
により不飽和低級炭化水素ガスとなり、この不飽和低級
炭化水素ガスは排気ガスとともに触媒層11へ導かれ、こ
こに充填されているメタロシリケート系触媒に還元剤と
して作用し、窒素酸化物をN2とＨ2Oとに転換せしめる。As a result, the fuel evaporates and undergoes thermal decomposition to become an unsaturated lower hydrocarbon gas. The unsaturated lower hydrocarbon gas is led to the catalyst layer 11 together with the exhaust gas, and is filled with the metallosilicate-based gas. It acts as a reducing agent on the catalyst and converts nitrogen oxides into N 2 and H 2 O.
【００１９】以上の実施例はディーゼルエンジン用排気
ガスの脱硝装置について説明したが、本発明は他の内燃
機関、ガスタービン等不飽和低級炭化水素ガスを還元剤
とするメタロシリケート系等の触媒層を有する脱硝装置
全般に適用できることは勿論である。Although the above embodiment has been described with respect to a denitration apparatus for exhaust gas for a diesel engine, the present invention relates to a catalyst layer such as a metallosilicate catalyst using an unsaturated lower hydrocarbon gas such as an internal combustion engine or gas turbine as a reducing agent. Needless to say, the present invention can be applied to all denitration apparatuses having
【００２０】[0020]
【発明の効果】本発明においては、排気ガス流路内に露
出するグロープラグの加熱部を高温に加熱し、この加熱
部の近傍に燃料噴射弁により燃料を噴射することにより
不飽和低級炭化水素ガスを生成することができる。According to the present invention, an unsaturated lower hydrocarbon is heated by heating a heating portion of a glow plug exposed in an exhaust gas passage to a high temperature and injecting fuel by a fuel injection valve near the heating portion. Gas can be generated.
【００２１】そして、この不飽和低級炭化水素ガスがメ
タロシリケート系等の触媒層に導かれて還元剤として作
用するので、従来のもののように、不飽和低級炭化水素
ガスを格別に生成貯蔵するための大型設備を必要としな
い。Since the unsaturated lower hydrocarbon gas is guided to a metallosilicate-based catalyst layer and acts as a reducing agent, the unsaturated lower hydrocarbon gas is produced and stored as in the conventional case. Does not require large equipment.
【００２２】また、触媒層の上流側の排気流路内で不飽
和低級炭化水素ガスを生成しうるので、従来のもののよ
うに、還元剤の漏洩による二次公害の発生を阻止でき
る。In addition, since unsaturated lower hydrocarbon gas can be generated in the exhaust flow path on the upstream side of the catalyst layer, it is possible to prevent secondary pollution caused by leakage of the reducing agent as in the conventional case.
【図１】本発明の１実施例に係る脱硝装置の構成図であ
る。FIG. 1 is a configuration diagram of a denitration apparatus according to one embodiment of the present invention.
１ ディーゼルエンジン ２ 給気マニホルド ３ 高圧燃料噴射弁 ４ 燃料供給管 4a 分岐管路 ５ 燃料供給ポンプ ６ 高圧噴射管 ７ エンジン用燃料噴射弁 ８ 排気マニホルド ９ 排気過給機 10 排気流路 11 触媒層 13 燃料噴射弁 14 グロープラグ 15 コントローラ 17 回転センサー DESCRIPTION OF SYMBOLS 1 Diesel engine 2 Supply manifold 3 High-pressure fuel injection valve 4 Fuel supply pipe 4a Branch line 5 Fuel supply pump 6 High-pressure injection pipe 7 Engine fuel injection valve 8 Exhaust manifold 9 Exhaust supercharger 10 Exhaust flow path 11 Catalyst layer 13 Fuel injection valve 14 Glow plug 15 Controller 17 Rotation sensor
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−59933（ＪＰ，Ａ) 特開 平４−318214（ＪＰ，Ａ) 実開 平４−87333（ＪＰ，Ｕ) 実開 平４−54926（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F01N 3/08 - 3/36 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-59933 (JP, A) JP-A-4-318214 (JP, A) JP-A-4-87333 (JP, U) JP-A-4-87333 54926 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) F01N 3/08-3/36
Claims (2)
ロシリケート系等の触媒層により排気ガス中の窒素酸化
物を除去する脱硝装置において、上記触媒層の上流側の
排気流路内にグロープラグの加熱部を露出させるととも
に上記グロープラグの加熱部近傍に燃料を噴射する噴射
弁を設けたことを特徴とする脱硝装置。1. A denitration apparatus for removing nitrogen oxides in exhaust gas by a metallosilicate-based catalyst layer using an unsaturated lower hydrocarbon as a reducing agent, wherein glow is introduced into an exhaust passage upstream of the catalyst layer. A denitration apparatus characterized in that an injection valve for injecting fuel is provided near a heating portion of the glow plug while exposing a heating portion of the plug.
数を検出する回転センサーと、この回転センサーの検出
信号を受けて上記グロープラグの加熱部を加熱するとと
もにその温度を制御するコントローラを設けたことを特
徴とする請求項１記載の脱硝装置。A rotation sensor for detecting a rotation speed of an engine for discharging the exhaust gas; and a controller for receiving a detection signal from the rotation sensor, heating a heating portion of the glow plug and controlling the temperature thereof. The denitration apparatus according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12785793A JP3281674B2 (en) | 1993-04-30 | 1993-04-30 | Denitration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12785793A JP3281674B2 (en) | 1993-04-30 | 1993-04-30 | Denitration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06317141A JPH06317141A (en) | 1994-11-15 |
| JP3281674B2 true JP3281674B2 (en) | 2002-05-13 |
Family
ID=14970384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12785793A Expired - Fee Related JP3281674B2 (en) | 1993-04-30 | 1993-04-30 | Denitration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3281674B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19625447B4 (en) * | 1996-06-26 | 2006-06-08 | Robert Bosch Gmbh | Pipe evaporator for additional fuel into the exhaust |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0454926U (en) * | 1990-09-20 | 1992-05-12 | ||
| JP2500050Y2 (en) * | 1990-12-14 | 1996-06-05 | 三菱自動車工業株式会社 | Exhaust gas treatment device |
| JP2921158B2 (en) * | 1991-04-17 | 1999-07-19 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| JP2923382B2 (en) * | 1991-08-30 | 1999-07-26 | 日野自動車工業株式会社 | Exhaust gas purification equipment for diesel engines |
-
1993
- 1993-04-30 JP JP12785793A patent/JP3281674B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06317141A (en) | 1994-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7530336B2 (en) | Intake condensation removal for internal combustion engine | |
| US20110265455A1 (en) | Ammonia burning internal combustion engine | |
| US7131265B2 (en) | Motor vehicle with a cryotank | |
| KR20090128512A (en) | Method and apparatus for supplying air to an emission abatement device by use of a turbocharger | |
| JP3305106B2 (en) | Denitration equipment for internal combustion engines | |
| US20070163246A1 (en) | Method and arrangement for cooling an exhaust system | |
| US8371110B2 (en) | Method for regenerating a particulate filter of an internal-combustion engine | |
| US20120060480A1 (en) | Exhaust gas purifiying apparatus in internal combustion engine | |
| US6497224B2 (en) | Internal combustion engine with combustion heater | |
| US20060096279A1 (en) | Internal combustion engine comprising a gas conveying system and operating method therefor | |
| JPH08135457A (en) | Engine with turbo supercharger | |
| JP3281674B2 (en) | Denitration equipment | |
| JP2007255256A (en) | Exhaust emission control device in internal combustion engine | |
| US10947896B1 (en) | Internal cleaning of an internal combustion engine after-treatment system | |
| CO4870787A1 (en) | ALTERNATIVE MOVING MACHINES WITH GAS FUEL COLA BLACK SMOKE | |
| JPH0681631A (en) | Exhaust emission control device for internal combustion engine | |
| JPH0544445A (en) | Denitrifying device for internal combustion engine with exhaust gas supercharger | |
| KR100486833B1 (en) | DURABILITY TEST SYSTEM FOR FUEL INJECTOR IN LPLi VEHICLES | |
| JP2006214337A (en) | Exhaust gas purifier | |
| JP2004263661A (en) | Exhaust emission cleaning device of internal combustion engine | |
| FR2879241A1 (en) | Exhaust gas pollution control device for fuel injected internal combustion engine, has fuel injection system with injector connected to fuel leakage return circuit upstream of maintenance unit maintaining fuel leakage under pressure | |
| KR940003533B1 (en) | Auxiliary ejecting apparatus | |
| JPH09324706A (en) | Exhaust gas re-circulation device for internal combustion engine | |
| KR200173918Y1 (en) | Fuel atomization device using exhaust heat | |
| US20200332690A1 (en) | Thermal management lightoff assist systems and methods for regenerating oxidation catalyst in exhaust system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020122 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080222 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090222 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100222 Year of fee payment: 8 |
|
| LAPS | Cancellation because of no payment of annual fees |