JP3283795B2 - Regeneration method and apparatus for exhaust gas purification system for diesel engine - Google Patents
Regeneration method and apparatus for exhaust gas purification system for diesel engineInfo
- Publication number
- JP3283795B2 JP3283795B2 JP19533197A JP19533197A JP3283795B2 JP 3283795 B2 JP3283795 B2 JP 3283795B2 JP 19533197 A JP19533197 A JP 19533197A JP 19533197 A JP19533197 A JP 19533197A JP 3283795 B2 JP3283795 B2 JP 3283795B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- boiling
- fuel
- oxidation catalyst
- 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
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Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
【0001】[0001]
【発明の属する技術分野】この発明は、主して船舶用デ
ィーゼル機関において排気ガス中に含まれる未燃焼燃料
や潤滑油などの油分を除去するための浄化処理装置の再
生方法とその再生装置を備えた排気ガス浄化処理装置に
関する。なお、この発明は酸化触媒を用いた排気ガス浄
化処理装置を対象とする。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of regenerating a purification treatment apparatus for removing oil such as unburned fuel and lubricating oil contained in exhaust gas mainly in a marine diesel engine and a regenerating apparatus therefor. The present invention relates to an exhaust gas purification processing device provided. The present invention is directed to an exhaust gas purifying apparatus using an oxidation catalyst.
【0002】[0002]
【従来の技術】この種の排気浄化装置として、例えば、
特開昭60−36709号公報に記載の装置がある。こ
の装置は、ディーゼル機関に一端が接続された排気管の
他端に円筒状ケーシングを接続し、このケーシング内に
設けた白金触媒にディーゼル機関からの排気ガスを通過
させることにより、排気ガス中のCOとHCを酸化させ
ると同時に、その際に生じる熱と排気ガスの熱とで白金
触媒を担持する担体層に付着したカーボンやオイルミス
トを燃焼させるように構成されている。2. Description of the Related Art As this type of exhaust gas purification device, for example,
There is an apparatus described in JP-A-60-36709. In this device, a cylindrical casing is connected to the other end of an exhaust pipe one end of which is connected to a diesel engine, and the platinum catalyst provided in the casing allows the exhaust gas from the diesel engine to pass therethrough. At the same time as CO and HC are oxidized, carbon and oil mist adhering to the carrier layer carrying the platinum catalyst are combusted by the heat generated at that time and the heat of the exhaust gas.
【0003】他の先行技術に、特公昭62−26818
号公報に記載の脱硝触媒の再生法がある。この方法は、
固形の脱硝触媒に付着・堆積した炭化水素物を除去して
再生する方法で、充填層に450℃〜550℃に加熱し
た加熱気体を流すことにより、前記炭化水素物を燃焼さ
せて再生しようとするものである。Another prior art is disclosed in Japanese Patent Publication No. 62-26818.
There is a method for regenerating a denitration catalyst described in Japanese Patent Application Laid-Open Publication No. H11-209,878. This method
In a method of removing and regenerating hydrocarbon substances attached and deposited on a solid denitration catalyst, it is attempted to burn and regenerate the hydrocarbon substances by flowing a heated gas heated to 450 ° C. to 550 ° C. through a packed bed. Is what you do.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、上記し
た公報に記載の排気浄化装置あるいはその再生法には、
次のような点で改良すべき課題がある。すなわち、 前者の装置は、担体層で捕集された油分のうち潤滑
油などの高沸点成分が酸化されにくく、したがって時間
の経過に伴って担体層(酸化触媒)の表面に徐々に付着
・堆積される。この結果、酸化触媒が劣化し、特に炭化
水素物を酸化させて浄化処理する能力が低下するので、
酸化触媒の再生が必要になる。However, the exhaust gas purifying apparatus and the method of regenerating the same described in the above-mentioned publications include:
There are issues to be improved in the following points. That is, in the former device, high-boiling components such as lubricating oil in the oil collected in the carrier layer are not easily oxidized, and thus gradually adhere to and accumulate on the surface of the carrier layer (oxidation catalyst) over time. Is done. As a result, the oxidation catalyst deteriorates, and in particular, the ability to oxidize and purify hydrocarbons decreases.
Regeneration of the oxidation catalyst is required.
【0005】 後者の方法は、触媒に対し高温の加熱
気体を流すので、触媒が燃焼熱などのより損傷するおそ
れがあり、触媒の寿命が短くなるため、短期間で触媒を
交換しなければならず、ランニングコストが高くなる。[0005] In the latter method, a high-temperature heated gas is supplied to the catalyst, so that the catalyst may be more damaged, such as heat of combustion, and the life of the catalyst is shortened. Therefore, the catalyst must be replaced in a short time. And running costs increase.
【0006】この発明は上述の点に鑑みなされたもの
で、酸化触媒を用いた排気浄化装置において酸化触媒が
劣化しにくく、劣化した場合には簡単にかつ即座に再生
され、ディーゼル機関からの排気ガス中に含まれる未燃
焼燃料や潤滑油などの油分を長期にわたり高効率で除去
することができる排気ガス浄化処理装置の酸化触媒の再
生法と同再生装置を備えた排気ガス浄化処理装置とを提
供することを目的としている。The present invention has been made in view of the above points, and in an exhaust gas purification apparatus using an oxidation catalyst, the oxidation catalyst is hardly deteriorated, and when it is deteriorated, it is easily and immediately regenerated, and the exhaust gas from the diesel engine is exhausted. A method for regenerating an oxidation catalyst of an exhaust gas purification system capable of removing oil components such as unburned fuel and lubricating oil contained in gas for a long period of time and an exhaust gas purification system equipped with the regeneration system It is intended to provide.
【0007】[0007]
【課題を解決するための手段】上記した目的を達成する
ために本発明にかかる排気ガス浄化処理装置の再生法
は、a)ディーゼル機関から排出される排気ガス通路の途
中に酸化触媒を介設して排気ガス中に含まれる未燃焼燃
料や潤滑油やカーボンや高沸点油分のオイルミストなど
を除去する排気浄化処理装置の再生方法であって、b)
前記酸化触媒に対し、その酸化触媒の圧損を測定して測
定した圧損値に応じて軽油や灯油などの低沸点燃料を気
化させた状態で導入することにより同低沸点燃料の酸化
によって前記触媒表面に吸着されているカーボンや高沸
点油分のオイルミストなどの酸化を促進し、前記酸化触
媒を再生するものである。In order to achieve the above object, the present invention provides a method for regenerating an exhaust gas purifying apparatus, comprising the steps of: a) providing an oxidation catalyst in the middle of an exhaust gas passage discharged from a diesel engine; A method for regenerating an exhaust purification treatment apparatus for removing unburned fuel, lubricating oil, carbon and oil mist of high boiling point oil contained in exhaust gas by b)
Measure the pressure loss of the oxidation catalyst by measuring the pressure loss of the oxidation catalyst.
Oxidation of low-boiling fuel, such as light oil or kerosene , by introducing it in a vaporized state according to the specified pressure loss value
Carbon and high boiling water adsorbed on the catalyst surface
It promotes the oxidation of oil mist and the like of the point oil to regenerate the oxidation catalyst.
【0008】上記構成を有する本発明の再生法によれ
ば、酸化触媒の表面にカーボンや高沸点油分のオイルミ
ストなどが付着し、酸化触媒を再生する必要性が生じた
ときに、低沸点燃料(例えば、灯油、軽油)を気化状態
で酸化触媒の上流側に導入することにより、酸化触媒に
気化された低沸点燃料が接触し、酸化反応を起こす。こ
の低沸点燃料の酸化により、触媒表面に吸着されている
カーボンや高沸点油分のオイルミストの酸化が促進さ
れ、触媒槽の通気抵抗が低減され、排気ガスと触媒との
接触が良好になり、触媒が活性化される。また、本発明
の再生法によると、酸化触媒の出入口間の圧力損失が計
測されるが、この圧力損失が増えるということは酸化触
媒の表面に付着するカーボンや高沸点油分のオイルミス
トなどが増えるということであり、これによって触媒の
再生の必要時期が検出されることになる。したがって、
触媒の再生の必要な時に低沸点燃料を酸化触媒に対し的
確に導入することができるので、低沸点燃料を有効に触
媒の再生に使用できる。 According to the regeneration method of the present invention having the above-described structure, when carbon or oil mist of a high-boiling oil adheres to the surface of the oxidation catalyst and the need to regenerate the oxidation catalyst arises, By introducing the vaporized state (for example, kerosene or light oil) upstream of the oxidation catalyst, the vaporized low-boiling fuel comes into contact with the oxidation catalyst to cause an oxidation reaction. Oxidation of carbon and high-boiling oil mist adsorbed on the catalyst surface is promoted by the oxidation of the low-boiling fuel, the ventilation resistance of the catalyst tank is reduced, and the contact between the exhaust gas and the catalyst is improved, The catalyst is activated. In addition, the present invention
According to the regeneration method, the pressure loss between the inlet and outlet of the oxidation catalyst is measured.
However, this increase in pressure loss is not
Oil mistake of carbon and high boiling oil adhering to the surface of the medium
Means that the number of catalysts increases,
The time required for regeneration is detected. Therefore,
Use low-boiling fuels for oxidation catalysts when catalyst regeneration is required.
As it can be introduced reliably, low-boiling fuel can be used effectively.
It can be used to regenerate a medium.
【0009】[0009]
【0010】[0010]
【0011】[0011]
【0012】[0012]
【0013】上記の目的を達成するために本発明にかか
る排気ガス浄化処理装置(請求項2)は、A)ディーゼル
機関から排出される排気ガス通路の途中に酸化触媒を介
設して排気ガス中に含まれる未燃焼燃料や潤滑油やカー
ボンや高沸点油分のオイルミストなどを除去する排気浄
化処理装置において、B)前記排気ガス通路の酸化触媒の
上流側に気化低沸点燃料の供給管の一端を接続し、該供
給管の他端側に気化低沸点燃料の吐出ポンプ、低沸点燃
料の気化器を介設するとともに、該気化器の吸気口にキ
ャリヤガス源を接続し、また気化器の燃料気化部に低沸
点燃料タンクを接続し、C)前記キャリヤガスを介して軽
油や灯油などの低沸点燃料を気化させ、前記酸化触媒に
気化低沸点燃料を吐出するように構成している。[0013] To achieve the above object, an exhaust gas purifying apparatus according to the present invention ( claim 2 ) comprises the following steps: A) providing an exhaust gas through an oxidation catalyst in an exhaust gas passage discharged from a diesel engine; Unburned fuel, lubricating oil and cars contained in
B) an exhaust gas purifying apparatus for removing oil mist or the like of high-boiling oil , B) connecting one end of a supply pipe for vaporized low-boiling fuel upstream of the oxidation catalyst in the exhaust gas passage, and connecting the other end of the supply pipe A low-boiling-point fuel discharge pump and a low-boiling-point fuel carburetor are interposed on the side, a carrier gas source is connected to the intake port of the carburetor, and a low-boiling-point fuel tank is connected to the fuel vaporizing section of the carburetor. C) light via the carrier gas
It is configured to vaporize a low-boiling fuel such as oil or kerosene and discharge the vaporized low-boiling fuel to the oxidation catalyst.
【0014】上記の構成を有する本発明にかかる排気ガ
ス浄化処理装置によると、タンク内の低沸点燃料が気化
器の気化部へ供給され、キャリヤガスを媒介として気化
され、吐出ポンプによる吐出力によって気化された低沸
点燃料が酸化触媒の上流側に導入される。この結果、上
記した請求項1に記載の再生法と同様の作用によって酸
化触媒が再生される。According to the exhaust gas purifying apparatus of the present invention having the above configuration, the low boiling point fuel in the tank is supplied to the vaporizing section of the vaporizer and vaporized by the carrier gas, and is discharged by the discharge force of the discharge pump. The vaporized low-boiling fuel is introduced upstream of the oxidation catalyst. As a result, the oxidation catalyst is regenerated by the same operation as the regenerating method according to claim 1 described above.
【0015】請求項3に記載のように、D)前記酸化触媒
の上流側と下流側との間に圧損計を配備し、前記吐出ポ
ンプの駆動をその圧損計による測定値に基づいて制御す
るようにしている。According to a third aspect of the present invention, D) a pressure drop gauge is provided between the upstream side and the downstream side of the oxidation catalyst, and the driving of the discharge pump is controlled based on a value measured by the pressure drop meter. Like that.
【0016】請求項3記載の装置によると、請求項1に
記載の再生法と同様の作用によって低沸点燃料が触媒の
再生に有効に使用される。According to the apparatus of the third aspect , the low-boiling fuel is effectively used for the regeneration of the catalyst by the same operation as the regeneration method of the first aspect .
【0017】[0017]
【発明の実施の形態】以下、この発明にかかる排気ガス
浄化処理装置およびその再生法について、実施の形態を
図面に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an exhaust gas purifying apparatus and a method of regenerating the same according to the present invention will be described with reference to the drawings.
【0018】図1はディーゼル機関から排出される排気
ガスの浄化試験装置を示す系統図、図2は低沸点燃料の
気化および供給装置の実施例を示す系統図、図3は低沸
点燃料による酸化触媒の再生効果を示すもので、縦軸に
出口側炭化水素物/入口側炭化水素物の比率を、横軸に
試験時間をとったグラフである。FIG. 1 is a system diagram showing an apparatus for purifying exhaust gas discharged from a diesel engine, FIG. 2 is a system diagram showing an embodiment of a device for vaporizing and supplying a low-boiling fuel, and FIG. It is a graph showing the regeneration effect of the catalyst, in which the vertical axis indicates the ratio of the hydrocarbons on the outlet side / the hydrocarbons on the inlet side, and the horizontal axis indicates the test time.
【0019】図1に示すように、浄化試験装置1は恒温
槽(オーブン)2を備え、ディーゼル機関Aの排気管B
に分岐管3の一端が接続されている。恒温槽2内には、
カートリッジに酸化触媒としての白金触媒が充填された
触媒槽4が収納され、分岐管3の他端が触媒槽4の入口
(上流端)に接続されている。触媒槽4の出口(下流
端)に吸引管5の一端が接続され、他端が恒温槽2の外
部に設置された吸引ユニット6に接続されている。吸引
ユニット6は、上流側からフィルタ6a・吸引ポンプ6
b・流量計6cの順に接続されて構成され、吸引ユニッ
ト6の下流端は排気口6dに形成されている。As shown in FIG. 1, a purification test apparatus 1 includes a thermostat (oven) 2 and an exhaust pipe B of a diesel engine A.
Is connected to one end of the branch pipe 3. In the thermostat 2,
A catalyst tank 4 filled with a platinum catalyst as an oxidation catalyst is housed in a cartridge, and the other end of the branch pipe 3 is connected to an inlet (upstream end) of the catalyst tank 4. One end of a suction pipe 5 is connected to an outlet (downstream end) of the catalyst tank 4, and the other end is connected to a suction unit 6 installed outside the thermostatic bath 2. The suction unit 6 includes a filter 6a and a suction pump 6 from the upstream side.
b, the flow meter 6c is connected in this order, and the downstream end of the suction unit 6 is formed at the exhaust port 6d.
【0020】分岐管3と触媒槽4の入口との間には、気
化燃料の供給装置7の供給管8の一端が接続されてい
る。供給装置7は、図2に示すように気化器9を備えて
いる。気化器9は灯芯9aが内蔵され、この灯芯9aに
低沸点燃料の供給管10の一端が接続されている。供給
管10の他端には低沸点燃料タンク11が接続され、途
中に供給ポンプ12が介設されている。供給装置7には
ヒーター7bも内蔵され、灯芯9aに供給された低沸点
燃料を加熱して気化し易くする。また、低沸点燃料の気
化を促進するため、気化器9の吸気口9cにキャリヤガ
ス供給管13の一端が接続され、他端にキャリヤガスタ
ンク14が接続されている。また、供給管13の途中
に、定圧バルブ15、流量計16および定量バルブ17
がそれぞれ介設されている。さらに、気化器9の吐出口
9dには上記供給管8が接続され、供給管8の途中に吐
出ポンプ18が介設されている。One end of a supply pipe 8 of a vaporized fuel supply device 7 is connected between the branch pipe 3 and the inlet of the catalyst tank 4. The supply device 7 includes a vaporizer 9 as shown in FIG. The vaporizer 9 has a built-in light core 9a, and one end of a low-boiling-point fuel supply pipe 10 is connected to the light core 9a. A low-boiling fuel tank 11 is connected to the other end of the supply pipe 10, and a supply pump 12 is provided on the way. The supply device 7 also has a built-in heater 7b, which heats the low boiling point fuel supplied to the light core 9a to facilitate vaporization. In order to promote the vaporization of the low boiling point fuel, one end of the carrier gas supply pipe 13 is connected to the intake port 9c of the vaporizer 9, and the carrier gas tank 14 is connected to the other end. In the middle of the supply pipe 13, a constant pressure valve 15, a flow meter 16 and a fixed quantity valve 17 are provided.
Are interposed respectively. Further, the supply pipe 8 is connected to a discharge port 9 d of the vaporizer 9, and a discharge pump 18 is interposed in the supply pipe 8.
【0021】上記した実施例の装置において、低沸点燃
料として灯油、軽油、プロピレンのほか、ディーゼル機
関Aの燃料と同じA重油を使用して試験を行った。キャ
リヤガスには窒素ガスを使用したが、空気でもよい。試
験はディーゼル機関Aの排気管Bから毎分30lの排気
ガスを吸引ユニット6で吸引するとともに、恒温槽2内
の温度を250℃に保って気化状態の低沸点燃料を空間
速度Sv=5000で触媒槽4に流通させた。In the apparatus of the above-described embodiment, a test was conducted by using kerosene, light oil, propylene as the low boiling point fuel, and heavy fuel oil A same as the fuel of the diesel engine A. Although nitrogen gas was used as the carrier gas, air may be used. In the test, 30 l / min of exhaust gas was sucked from the exhaust pipe B of the diesel engine A by the suction unit 6, and the temperature in the constant temperature bath 2 was kept at 250 ° C. to evaporate the low boiling fuel in the vaporized state at the space velocity Sv = 5000. It was circulated through the catalyst tank 4.
【0022】灯油を気化させて供給装置7から触媒槽
4に連続的に一定時間供給したのち、軽油に切り替え
て気化させて触媒槽4に連続的に一定時間供給し、最
後にA重油に切り替えて気化させて触媒槽4に連続的に
供給した場合の、触媒槽4の出口から排出される排気ガ
ス中の全HC(炭化水素物)の量を測定して触媒槽4の
浄化作用を調べた。A重油に切り替えてしばらく(30
分程度経過)すると、炭化水素物の排出量が徐々に増え
続け、触媒槽4が劣化したことが確認された。A重油は
触媒槽4の表面に吸着されるが、酸化されにくいために
徐々に被覆していき、触媒槽4を劣化させる。After the kerosene is vaporized and continuously supplied from the supply device 7 to the catalyst tank 4 for a certain period of time, it is switched to light oil to be vaporized and continuously supplied to the catalyst tank 4 for a predetermined period of time, and finally switched to heavy fuel oil A. When the gas is vaporized and continuously supplied to the catalyst tank 4, the purifying action of the catalyst tank 4 is examined by measuring the total amount of HC (hydrocarbon) in the exhaust gas discharged from the outlet of the catalyst tank 4. Was. Switch to Fuel Oil A for a while (30
After about a minute), it was confirmed that the amount of discharge of the hydrocarbon continued to increase gradually, and the catalyst tank 4 was deteriorated. Fuel oil A is adsorbed on the surface of the catalyst tank 4, but is not easily oxidized, so that it is gradually coated and deteriorates the catalyst tank 4.
【0023】そこで、本試験ではプロピレン(常温でガ
ス状のもの)を供給装置7から触媒槽4に連続的に供給
したところ、触媒と接触して酸化され、吸着しているA
重油が酸化されて触媒が活性化され、図3に示すように
触媒出口側の排気ガス中のHC/触媒入口側の排気ガス
中のHCの比が低下し、触媒が再生された。その後、プ
ロピレンに代えてA重油を気化させて触媒槽4に供給し
たところ、再び劣化が始まった。Therefore, in this test, when propylene (in a gaseous state at room temperature) was continuously supplied from the supply device 7 to the catalyst tank 4, it was oxidized and adsorbed by contact with the catalyst.
The heavy oil was oxidized to activate the catalyst, and as shown in FIG. 3, the ratio of HC in the exhaust gas on the catalyst outlet side / HC in the exhaust gas on the catalyst inlet side decreased, and the catalyst was regenerated. Thereafter, when heavy fuel oil A was vaporized in place of propylene and supplied to the catalyst tank 4, deterioration started again.
【0024】上記したとおり、低沸点燃料を酸化触媒に
供給することによる再生効果が確認されたので、図1に
示すように、ディーゼル機関Aの排気管Bの途中に酸化
触媒(白金触媒やパラジュウム触媒など)21を介設す
る。そして供給装置7の供給管8の一端を、酸化触媒2
1の入口(上流端)付近に接続する。また、酸化触媒2
1の入口側と出口側との間における圧力損失を計測する
圧損計22を配備し、圧損計22による計測値が所定値
を超えた状態で、吐出ポンプ18(図2参照)の運転を
開始する制御回路23を接続する。低沸点燃料として、
例えば灯油を使用する。このようにして、圧損値が所定
値に達するたびに、低沸点燃料を気化させて酸化触媒2
1の入口に導入させ、酸化を促進し、酸化触媒2の劣化
を常時防止するように構成した。本例では、試験装置1
のような恒温槽2を設けていないが、これは排気ガス温
度が比較的高く、500℃近くになることがあるためで
ある。As described above, the regenerating effect by supplying the low-boiling fuel to the oxidation catalyst was confirmed. As shown in FIG. 1, the oxidation catalyst (platinum catalyst or palladium catalyst) was placed in the exhaust pipe B of the diesel engine A. A catalyst 21). Then, one end of the supply pipe 8 of the supply device 7 is connected to the oxidation catalyst 2.
1 near the inlet (upstream end). In addition, oxidation catalyst 2
1 is provided with a pressure loss meter 22 for measuring a pressure loss between the inlet side and the outlet side, and the operation of the discharge pump 18 (see FIG. 2) is started in a state where the value measured by the pressure loss meter 22 exceeds a predetermined value. Control circuit 23 is connected. As a low-boiling fuel,
For example, kerosene is used. In this way, each time the pressure loss value reaches a predetermined value, the low-boiling fuel is vaporized and the oxidation catalyst 2 is removed.
1 was introduced at the inlet to promote oxidation and to prevent deterioration of the oxidation catalyst 2 at all times. In this example, the test device 1
Is not provided because the exhaust gas temperature is relatively high and may be close to 500 ° C.
【0025】上記に本発明の一実施例を示したが、下記
のように実施することができる。つまり、圧損計22に
代えて、HCやSOX の定量計測器を設けて所定値に達
したときに、気化させた低沸点燃料を酸化触媒21に対
し吐出させたり、あるいはタイマーを設けて一定時間ご
とに吐出させたりすることができる。Although one embodiment of the present invention has been described above, the present invention can be implemented as follows. In other words, a quantitative meter for HC or SO X is provided in place of the pressure drop meter 22, and when a predetermined value is reached, the vaporized low-boiling fuel is discharged to the oxidation catalyst 21 or a fixed timer is provided by providing a timer. It can be discharged every time.
【0026】[0026]
【発明の効果】以上、説明したことから明らかなよう
に、本発明にかかるディーゼル機関用排気浄化処理装置
の再生方法とその装置には、次のような優れた効果があ
る。As is apparent from the above description, the regeneration method of the exhaust gas purifying apparatus for a diesel engine and the apparatus according to the present invention have the following excellent effects.
【0027】(1) 本発明の再生法によれば、酸化触媒の
表面にカーボンや高沸点油分のオイルミストなどが付着
して酸化触媒が劣化した場合にも、気化された低沸点燃
料が酸化触媒に接触し、酸化反応を起こすので、表面に
吸着されているカーボンや高沸点油分のオイルミストの
酸化が促進され、触媒を活性化できる。このため、酸化
触媒が劣化しにくく、ディーゼル機関からの排気ガス中
に含まれる未燃焼燃料や潤滑油などの油分を長期にわた
り高効率で除去できる。(1) According to the regenerating method of the present invention, even when carbon or high-boiling oil mist adheres to the surface of the oxidation catalyst to deteriorate the oxidation catalyst, the vaporized low-boiling fuel is oxidized. Since it comes into contact with the catalyst and causes an oxidation reaction, the oxidation of carbon mist and oil mist of high boiling point oil adsorbed on the surface is promoted, and the catalyst can be activated. Therefore, the oxidation catalyst is hardly deteriorated, and oil components such as unburned fuel and lubricating oil contained in the exhaust gas from the diesel engine can be efficiently removed for a long period of time.
【0028】(2) また、酸化触媒の出入口間の圧力損失
に基づいて触媒の再生が必要な時期が検出され、低沸点
燃料を酸化触媒に対し的確に導入できるので、低沸点燃
料が触媒の再生に有効に使用される。(2) Further , the time when the regeneration of the catalyst is necessary is detected based on the pressure loss between the inlet and the outlet of the oxidation catalyst, and the low-boiling fuel can be accurately introduced into the oxidation catalyst. Used effectively for playback.
【0029】[0029]
【0030】(3) 排気ガス浄化処理装置(請求項2)
は、簡単な構造で、キャリヤガスを媒介として気化した
低沸点燃料を酸化触媒の上流側に導入でき、請求項1に
記載の再生法と同様に酸化触媒を効果的に再生できる。( 3 ) Exhaust gas purification treatment device (Claim 2 )
With a simple structure, a low-boiling fuel vaporized via a carrier gas can be introduced upstream of the oxidation catalyst, and the oxidation catalyst can be effectively regenerated in the same manner as the regeneration method according to the first aspect.
【0031】(4) 請求項3記載の装置は、請求項1に記
載の再生法と同様の作用によって低沸点燃料を触媒の再
生に有効に使用できる。( 4 ) The device according to claim 3 can effectively use a low-boiling-point fuel for the regeneration of the catalyst by the same operation as the regeneration method according to claim 1 .
【図1】本発明の実施例にかかるディーゼル機関から排
出される排気ガスの浄化試験装置を示す系統図である。FIG. 1 is a system diagram showing a test apparatus for purifying exhaust gas discharged from a diesel engine according to an embodiment of the present invention.
【図2】低沸点燃料の気化および供給装置の実施例を示
す系統図である。FIG. 2 is a system diagram showing an embodiment of an apparatus for vaporizing and supplying a low boiling point fuel.
【図3】低沸点燃料による酸化触媒の再生効果を示すも
ので、縦軸に出口側炭化水素物/入口側炭化水素物の比
率を、横軸に試験時間をとったグラフである。FIG. 3 is a graph showing a regeneration effect of an oxidation catalyst by a low-boiling fuel, in which a vertical axis indicates a ratio of an outlet-side hydrocarbon substance / an inlet-side hydrocarbon substance, and a horizontal axis indicates a test time.
1 浄化試験装置 2 恒温槽(オーブン) 3 分岐管 4 触媒槽 5 吸引管 6 吸引ユニット 7 気化燃料の供給装置 8・10 供給管 9 気化器 11 低沸点燃料タンク 12 供給ポンプ 13 キャリヤガス供給管 14 キャリヤガスタンク 18 吐出ポンプ 21 酸化触媒 22 圧損計 A ディーゼル機関 B 排気管 DESCRIPTION OF SYMBOLS 1 Purification test apparatus 2 Constant temperature oven (oven) 3 Branch pipe 4 Catalyst tank 5 Suction pipe 6 Suction unit 7 Supply apparatus of vaporized fuel 8.10 Supply pipe 9 Vaporizer 11 Low boiling point fuel tank 12 Supply pump 13 Carrier gas supply pipe 14 Carrier gas tank 18 Discharge pump 21 Oxidation catalyst 22 Pressure drop gauge A Diesel engine B Exhaust pipe
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) B01J 21/00 - 38/74 B01D 53/86,53/94 F01N 3/20 F01N 3/36 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) B01J 21/00-38/74 B01D 53 / 86,53 / 94 F01N 3/20 F01N 3/36
Claims (3)
通路の途中に酸化触媒を介設して排気ガス中に含まれる
未燃焼燃料や潤滑油やカーボンや高沸点油分のオイルミ
ストなどを除去する排気浄化処理装置の再生方法であっ
て、 前記酸化触媒に対し、その酸化触媒の圧損を測定して測
定した圧損値に応じて軽油や灯油などの低沸点燃料を気
化させた状態で導入することにより同低沸点燃料の酸化
によって前記触媒表面に吸着されているカーボンや高沸
点油分のオイルミストなどの酸化を促進し、前記酸化触
媒を再生することを特徴とするディーゼル機関用排気浄
化処理装置の再生方法。1. An exhaust gas passage for exhausting unburned fuel, lubricating oil , carbon and high-boiling oil contained in exhaust gas through an oxidation catalyst in the middle of an exhaust gas passage discharged from a diesel engine.
A method for regenerating an exhaust purification treatment apparatus for removing a gas or the like, the method comprising measuring pressure loss of the oxidation catalyst with respect to the oxidation catalyst.
Oxidation of low-boiling fuel, such as light oil or kerosene , by introducing it in a vaporized state according to the specified pressure loss value
Carbon and high boiling water adsorbed on the catalyst surface
A method for regenerating an exhaust gas purification treatment device for a diesel engine , comprising promoting the oxidation of oil mist or the like of a point oil to regenerate the oxidation catalyst.
通路の途中に酸化触媒を介設して排気ガス中に含まれる
未燃焼燃料や潤滑油やカーボンや高沸点油分のオイルミ
ストなどを除去する排気浄化処理装置において、 前記排気ガス通路の酸化触媒の上流側に気化低沸点燃料
の供給管の一端を接続し、該供給管の他端側に気化低沸
点燃料の吐出ポンプ、低沸点燃料の気化器を介設すると
ともに、該気化器の吸気口にキャリヤガス源を接続し、
また気化器の燃料気化部に低沸点燃料タンクを接続し、 前記キャリヤガスを介して軽油や灯油などの低沸点燃料
を気化させ、前記酸化触媒に気化低沸点燃料を吐出する
ように構成したことを特徴とするディーゼル機関用排気
浄化処理装置。2. An oil catalyst containing unburned fuel, lubricating oil, carbon and high-boiling oil contained in exhaust gas through an oxidation catalyst interposed in an exhaust gas passage discharged from a diesel engine.
In an exhaust gas purifying apparatus for removing a gaseous exhaust gas, an end of a supply pipe for vaporized low-boiling fuel is connected to the exhaust gas passage upstream of the oxidation catalyst, and a discharge pump for vaporized low-boiling fuel is connected to the other end of the supply pipe. , A low-boiling fuel vaporizer is interposed, and a carrier gas source is connected to the intake port of the vaporizer,
Further, a low-boiling fuel tank is connected to a fuel vaporizing section of the carburetor, the low-boiling fuel such as light oil or kerosene is vaporized through the carrier gas, and the vaporized low-boiling fuel is discharged to the oxidation catalyst. An exhaust gas purification treatment device for a diesel engine, characterized in that:
圧損計を配備し、前記吐出ポンプの駆動をその圧損計に
よる測定値に基づいて制御するようにした請求項2記載
のディーゼル機関用排気浄化処理装置。3. The diesel engine according to claim 2 , wherein a pressure loss meter is provided between an upstream side and a downstream side of the oxidation catalyst, and the driving of the discharge pump is controlled based on a value measured by the pressure loss meter. Engine exhaust purification system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19533197A JP3283795B2 (en) | 1997-07-22 | 1997-07-22 | Regeneration method and apparatus for exhaust gas purification system for diesel engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19533197A JP3283795B2 (en) | 1997-07-22 | 1997-07-22 | Regeneration method and apparatus for exhaust gas purification system for diesel engine |
Publications (2)
Publication Number | Publication Date |
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JPH1133414A JPH1133414A (en) | 1999-02-09 |
JP3283795B2 true JP3283795B2 (en) | 2002-05-20 |
Family
ID=16339401
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JP19533197A Expired - Fee Related JP3283795B2 (en) | 1997-07-22 | 1997-07-22 | Regeneration method and apparatus for exhaust gas purification system for diesel engine |
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JP (1) | JP3283795B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003090271A (en) | 2001-07-11 | 2003-03-28 | Toyota Motor Corp | Internal combustion engine |
WO2005054637A1 (en) | 2003-12-01 | 2005-06-16 | Toyota Jidosha Kabushiki Kaisha | Exhaust emission purification apparatus of compression ignition internal combustion engine |
CN110227312B (en) * | 2018-04-04 | 2021-12-03 | 乐清市然景电气有限公司 | Exhaust gas purification method |
-
1997
- 1997-07-22 JP JP19533197A patent/JP3283795B2/en not_active Expired - Fee Related
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