KR102141729B1 - Apparatus of Treating Exhaust GAS for Ship - Google Patents

Apparatus of Treating Exhaust GAS for Ship Download PDF

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KR102141729B1
KR102141729B1 KR1020180071362A KR20180071362A KR102141729B1 KR 102141729 B1 KR102141729 B1 KR 102141729B1 KR 1020180071362 A KR1020180071362 A KR 1020180071362A KR 20180071362 A KR20180071362 A KR 20180071362A KR 102141729 B1 KR102141729 B1 KR 102141729B1
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South Korea
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exhaust gas
reactor
space
exhaust pipe
methane
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KR1020180071362A
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Korean (ko)
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KR20190143636A (en
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성삼경
김도윤
김현수
정이효
함진기
장용훈
이인호
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한국조선해양 주식회사
현대중공업 주식회사
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    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/10—Carbon or carbon 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—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
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications

Abstract

본 발명은 액화천연가스를 추진 연료로 사용하고 있는 선박의 배기가스에 포함된 메탄(CH4), 질소산화물(NOx)을 통합된 하나의 반응기로 제거 처리할 수 있도록 한 것으로, 본 발명에서는 반응기로 삽입된 배기관 내에는 메탄과 질소산화물을 제거하기 위한 환원촉매가 하나 이상 배기가스 흐름을 가로막는 배치방향으로 삽입되어 있는 선박용 고압 배기가스 처리장치가 제공된다.The present invention is to enable the methane (CH4), nitrogen oxides (NOx) contained in the exhaust gas of a ship using liquefied natural gas as a propulsion fuel to be removed and treated with a single integrated reactor. In the inserted exhaust pipe, a high-pressure exhaust gas treatment device for a ship is provided in which a reducing catalyst for removing methane and nitrogen oxides is inserted in a batch direction that blocks one or more exhaust gas flows.

Description

선박용 고압 배기가스 처리장치{Apparatus of Treating Exhaust GAS for Ship} High pressure exhaust gas treatment system for ships {Apparatus of Treating Exhaust GAS for Ship}

본 발명은 선박용 고압 배기가스 처리장치에 관한 것으로, 액화천연가스를 추진 연료로 사용하거나 동시에 사용하는 선박의 배기가스에 포함된 메탄(CH4), 질소산화물(NOx)을 하나의 반응기로 동시 제거 처리할 수 있도록 한 것이다.The present invention relates to an apparatus for treating high-pressure exhaust gas for ships, which simultaneously removes methane (CH4) and nitrogen oxides (NOx) contained in the exhaust gas of a ship using liquefied natural gas as propulsion fuel or simultaneously using a reactor. It was made possible.

선박용 엔진에 일반적으로 장착되고 있는 고압 배기가스 처리장치는 터보차저(Turbo Charger) 엔진의 터보차저 전단에 설치되고, 이 경우 유입되는 배기가스의 압력이 높기 때문에 고압 배기가스 처리장치라 불린다.The high-pressure exhaust gas treatment device generally installed in a marine engine is installed at the front end of a turbocharger of a turbo charger engine, and is called a high-pressure exhaust gas treatment device because the pressure of the incoming exhaust gas is high.

이러한 고압 배기가스 처리장치는 엔진에서 연소 후 배기 되는 질소산화물(NOx)을 제거하기 위한 SCR 반응기를 갖추고 있다. The high-pressure exhaust gas treatment device is equipped with an SCR reactor for removing nitrogen oxides (NOx) exhausted after combustion in the engine.

따라서, 선박용 엔진에서 배출되는 배기가스를 처리하기 위하여 일반적으로 장착되고 있는 고압 배기가스 처리장치는 앞서 설명된 바와 같이 질소산화물에 대해서만 환원반응으로 제거 처리가 가능하여 천연가스를 추진 연료로 사용하고 있는 선박의 배기가스에 포함된 메탄의 산화를 시킬 수 없어 온실가스 물질인 메탄을 그대로 대기 중으로 방출하는 문제가 있었다.Therefore, the high-pressure exhaust gas treatment device, which is generally mounted to treat exhaust gas discharged from a marine engine, can remove nitrogen oxides only through a reduction reaction, as described above, and uses natural gas as a propulsion fuel. Since the methane contained in the exhaust gas of a ship cannot be oxidized, there was a problem of releasing methane, a greenhouse gas substance, into the atmosphere.

그에 따라 배기가스에 포함된 메탄을 안정적으로 제거하기 위한 처리 기술과 더불어 메탄과 질소산화물을 동시 제거하는 통합된 고압 배기가스 처리장치의 개발이 시급한 실정이다.Accordingly, there is an urgent need to develop an integrated high-pressure exhaust gas treatment device that simultaneously removes methane and nitrogen oxides as well as a treatment technology for stably removing methane contained in the exhaust gas.

대한민국공개특허공보 공개번호 10-2015-0100221호Republic of Korea Patent Publication No. 10-2015-0100221 일본공개특허공보 특개2006-515401호Japanese Patent Application Publication No. 2006-515401 대한민국등록특허공보 등록번호 10-0890003호Republic of Korea Registered Patent Publication No. 10-0890003

본 발명은 배기가스에 포함된 질소산화물(NOx)과 메탄(CH4)을 함께 동시 제거 처리할 수 있도록 함으로써, 액화천연가스를 추진 연료로 사용하고 있는 선박의 배기가스에 포함된 메탄(CH4), 질소산화물(NOx)을 하나의 반응기로 동시 제거 처리할 수 있도록 한 선박용 저압 배기가스 처리장치를 제공하는데 목적이 있다.The present invention allows the simultaneous removal treatment of nitrogen oxides (NOx) and methane (CH4) contained in the exhaust gas, so that methane (CH4) contained in the exhaust gas of a ship using liquefied natural gas as a propulsion fuel, It is an object of the present invention to provide a low-pressure exhaust gas treatment system for a vessel so that nitrogen oxides (NOx) can be simultaneously removed by a reactor.

상기와 같은 목적을 달성하기 위하여 본 발명은, 엔진의 배기가스가 배기 되는 배기관이 반응기의 일 측면으로부터 인출되는 구조로 반응기 내에 삽입되고, 상기 배기관이 삽입되는 반응기의 전단과, 상기 전단과 대응하는 후단에는 전단 공간과 후단 공간이 각각 형성되어 있고, 상기 반응기의 전단공간은 배출관과 소통 연결되는 선박용 고압 배기가스 처리장치로서, 상기 반응기로 삽입된 배기관 내에는 메탄과 질소산화물을 제거하기 위한 환원촉매가 하나 이상 배기가스 흐름을 가로막는 배치방향으로 삽입되어 있는 선박용 고압 배기가스 처리장치가 제공된다.In order to achieve the above object, the present invention, the exhaust pipe from which the exhaust gas of the engine is exhausted is inserted into the reactor in a structure that is drawn out from one side of the reactor, the front end of the reactor into which the exhaust pipe is inserted, and corresponding to the front end A front end space and a rear end space are respectively formed at the rear end, and the front end space of the reactor is a high-pressure exhaust gas treatment device for a ship in communication with an exhaust pipe, and a reducing catalyst for removing methane and nitrogen oxides in the exhaust pipe inserted into the reactor. A high-pressure exhaust gas treatment device for ships is provided which is inserted in a batch direction that blocks at least one exhaust gas flow.

또한, 본 발명에서는 배기관의 외면 둘레와 반응기의 내면 간에 형성되는 둘레 공간에는 배기관의 둘레를 전부 감싸는 형태로 산화촉매가 배기가스 흐름을 가로막는 배치방향으로 결합 고정되어 있는 선박용 고압 배기가스 처리장치가 제공된다.In addition, in the present invention, in the circumferential space formed between the outer surface of the exhaust pipe and the inner surface of the reactor, a high-pressure exhaust gas treatment system for ships is provided in which the oxidizing catalyst is fixed in a batch direction to block the exhaust gas flow in the form surrounding the exhaust pipe. do.

이상에서 살펴본 바와 같이 본 발명에 따른 선박용 고압 배기가스 처리장치를 사용하게 되면, 통합된 하나의 반응기를 통해 질소산화물 제거는 물론, 천연가스를 추진 연료로 사용하고 있는 선박의 배기가스에 포함된 메탄에 대해서도 제거할 수 있는 효과가 있다.As described above, when the high pressure exhaust gas treatment system for ships according to the present invention is used, nitrogen oxides are removed through one integrated reactor and methane contained in the exhaust gas of a ship using natural gas as a propulsive fuel. There is also an effect that can be removed.

도 1은 본 발명에 따른 선박용 고압 배기가스 처리장치를 보여주는 반단면도이다. 1 is a half sectional view showing a high pressure exhaust gas treatment system for a ship according to the present invention.

이하 첨부된 도면을 참조로 본 발명에 따른 선박용 고압 배기가스 처리장치에 대한 바람직한 실시예를 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of a high-pressure exhaust gas treatment apparatus for a ship according to the present invention.

도 1에 도시된 바와 같이 고압 배기가스 처리장치(10)는 선박용 엔진(12)에서 연소 된 배기가스가 배기 되는 배기관(12)이 통 형태의 구조로 이루어진 반응기(16)의 일 측면으로부터 인출되는 구조로 반응기(16) 내에 삽입 결합 되어 있으며, 이러한 결합 구조로 인하여 배기관(14)의 외면 둘레와 반응기(16)의 내면 간에 거리를 가지게 되고 그로 인해 배기관(14)의 외면 둘레를 따라 둘레 공간(18)이 형성된다.As shown in FIG. 1, the high-pressure exhaust gas treatment apparatus 10 is drawn out from one side of the reactor 16 in which the exhaust pipe 12 in which the exhaust gas burned in the marine engine 12 is exhausted is formed in a tubular structure. It is inserted into the reactor 16 in a structure, and due to this coupling structure, it has a distance between the outer surface of the exhaust pipe 14 and the inner surface of the reactor 16, whereby the circumferential space along the outer surface of the exhaust pipe 14 ( 18) is formed.

상기 배기관(14)이 삽입되는 반응기(16)의 전단과, 상기 전단과 대응하는 후단에는 전단 공간(20)과 후단 공간(22)이 각각 형성되어 있고, 상기 반응기(16)의 배출관(24)은 전단 공간(20)과 소통하는 형태로 연결되어 있다.The front end of the reactor 16 into which the exhaust pipe 14 is inserted, and a front end space 20 and a rear end space 22 are respectively formed at the rear end corresponding to the front end, and the discharge pipe 24 of the reactor 16 is formed. Is connected in a form of communicating with the shear space (20).

따라서, 엔진(12)으로부터 연소된 배기가스는 배기관(14)을 따라 반응기(16)의 후단 공간(22)으로 모이게 된다. 상기 후단 공간(22)에 모인 배기가스는 둘레 공간(18)을 따라 이동하여 전단 공간(20)으로 모이게 되며, 상기 전단 공간(20)에 모인 배기가스는 반응기(16)의 배출관(24)을 따라 배기 되는 흐름을 가지게 된다.Accordingly, the exhaust gas burned from the engine 12 is collected along the exhaust pipe 14 into the rear space 22 of the reactor 16. The exhaust gas collected in the rear end space 22 moves along the circumferential space 18 to be collected in the front end space 20, and the exhaust gas collected in the front end space 20 connects the exhaust pipe 24 of the reactor 16. Therefore, it has an exhausted flow.

이때, 상기 반응기(16)로 삽입된 배기관(14) 내에는 적어도 하나 이상의 환원촉매(26)(코발트(Co) 및 망간(Mn) 인듐(In), 백금(Pt), 팔라듐(Pd)을 함유하는 제올라이트, 알루미나(Al2O3) 등의 촉매)가 배기가스 흐름을 가로막는 배치방향으로 삽입되어 있다.At this time, at least one reduction catalyst 26 (cobalt (Co) and manganese (Mn) indium (In), platinum (Pt), palladium (Pd)) is contained in the exhaust pipe 14 inserted into the reactor 16 A zeolite and alumina (a catalyst such as Al 2 O 3 )) are inserted in the arrangement direction to block the exhaust gas flow.

또한, 상기 둘레 공간(18)에는 배기관(14)의 둘레를 전부 감싸는 형태로 산화촉매(28)(망간(Mn) 백금(Pt) 코발트(Co) 팔라듐(Pd)을 함유하는 혼합산화물촉매)가 배기가스 흐름을 가로막는 배치방향으로 결합 고정되어 있다.In addition, in the circumferential space 18, an oxidation catalyst 28 (a mixed oxide catalyst containing manganese (Mn) platinum (Pt) cobalt (Co) palladium (Pd)) in a form surrounding the entire circumference of the exhaust pipe 14 is provided. It is coupled and fixed in the arrangement direction to block the exhaust gas flow.

따라서, 액화천연가스를 추진 연료로 사용하고 있는 선박의 배기가스는 배기관(14)을 통해 반응기(16)의 내부로 유입되는데, 이때 배기관(14)으로 흐르는 배기가스에는 메탄(CH4), 질소산화물(NOx)이 포함되어 있다.Accordingly, the exhaust gas of a ship using liquefied natural gas as a propulsive fuel flows into the interior of the reactor 16 through the exhaust pipe 14, wherein the exhaust gas flowing into the exhaust pipe 14 is methane (CH4), nitrogen oxide (NOx) is included.

상기 배기관(14)으로 흐르는 배기가스는 먼저 환원촉매(26)를 통과하게 되고 이 과정에서 환원촉매(26)는 메탄 및 일산화질소와 반응을 하게 되어 메탄과 질소산화물을 동시에 제거하는 상태로 반응기(16)의 후단 공간(22)에 모이게 된다.The exhaust gas flowing into the exhaust pipe 14 first passes through the reducing catalyst 26, and in the process, the reducing catalyst 26 reacts with methane and nitrogen monoxide, thereby simultaneously removing methane and nitrogen oxides. 16) is collected in the rear space (22).

이와 같이 반응기(16)의 후단 공간(22)에 모인 배기가스는 둘레 공간(18)을 따라 전단 공간(20)으로 이동하게 되는데, 이때 둘레 공간(18)에 배치된 산화촉매(28)를 통과하게 되고, 배기가스가 산화촉매(28)를 통과하는 과정에서 메탄의 산화 반응으로 인해 메탄만을 더 제거하게 됨으로써 잔류하는 메탄을 확실하게 제거하게 된다.The exhaust gas collected in the rear end space 22 of the reactor 16 moves to the front end space 20 along the circumferential space 18, and passes through the oxidation catalyst 28 disposed in the circumferential space 18. In the process of exhaust gas passing through the oxidation catalyst 28, only methane is further removed due to the oxidation reaction of methane, thereby reliably removing residual methane.

상기 산화촉매(28)를 통과한 배기가스는 반응기(16)의 전단 공간(20)으로 모이게 되고, 이와 같이 처리가 완료된 배기가스는 배출관(24)을 따라 배출된다. The exhaust gas that has passed through the oxidation catalyst 28 is collected in the front end space 20 of the reactor 16, and the exhaust gas thus treated is discharged along the exhaust pipe 24.

따라서, 배기가스가 하나로 통합된 고압 배기가스 처리장치(10)를 통과하게 되면서 메탄과 질소산화물의 동시 제거가 가능하게 된다. Thus, while the exhaust gas passes through the high pressure exhaust gas treatment device 10 integrated into one, simultaneous removal of methane and nitrogen oxides is possible.

본 발명에 따른 메탄과 질소산화물을 동시 저감 하는 선박용 고압 배기가스 처리장치를 사용하게 되면, 하나의 반응기를 통하여 메탄과 질소산화물을 동시 제거할 수 있게 됨으로써, 천연가스를 추진 연료로 사용하고 있는 배기가스에 포함된 메탄을 제거할 수 있게 된다.When a high pressure exhaust gas treatment system for ships simultaneously reducing methane and nitrogen oxides according to the present invention is used, methane and nitrogen oxides can be simultaneously removed through one reactor, thereby exhausting natural gas as a propulsive fuel. It is possible to remove the methane contained in the gas.

이상과 같이, 본 발명은 비록 한정된 실시 예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 아니하며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재된 특허청구범위의 균등범위 내에서 다양한 수정 및 변형 가능함은 물론이다.As described above, although the present invention has been described by a limited embodiment and drawings, the present invention is not limited by this, and the technical idea of the present invention and the following by a person skilled in the art to which the present invention pertains Of course, various modifications and variations can be made within the scope of the equivalent claims.

10 : 고압 배기가스 처리장치
12 : 엔진
14 : 배기관
16 : 반응기
18 : 둘레공간
20 : 전단공간
22 : 후단공간
24 : 배출관
26 : 환원촉매
28 : 산화촉매10: High pressure exhaust gas treatment device
12: engine
14: exhaust pipe
16: reactor
18: circumferential space
20: Shear space
22: trailing space
24: discharge pipe
26: reduction catalyst
28: oxidation catalyst

Claims (2)

엔진의 배기가스가 배기 되는 배기관(14)이 반응기(16)의 일 측면으로부터 인출되는 구조로 반응기(16) 내에 삽입되고,
상기 배기관(14)이 삽입되는 반응기(16)의 전단과, 상기 전단과 대응하는 후단에는, 각각 전단 공간(20)과 후단 공간(22)이 형성되고,
상기 반응기(16)의 전단 공간(20)은, 터보차저의 전단에 연결되는 배출관(24)과 소통 연결되고,
상기 반응기(16)로 삽입된 상기 배기관(14) 내에는, 메탄과 질소산화물을 함께 제거하기 위한 환원촉매(26)가 하나 이상 배기가스 흐름을 가로막는 배치방향으로 삽입되어 있고,
상기 배기관(14)의 외면 둘레와 상기 반응기(16)의 내면 간에 형성되는 둘레 공간(18)에는, 상기 배기관(14)의 둘레를 전부 감싸는 형태로 산화촉매(28)가 배기가스 흐름을 가로막는 배치방향으로 결합 고정되어 있으며,
엔진으로부터 상기 배기관(14)으로 나온 배기가스는, 상기 배기관(14) 내에 배치된 상기 환원촉매(26)를 먼저 통과하면서 메탄과 질소산화물이 동시에 제거된 후, 상기 반응기(16)의 후단 공간(22)에 모이며, 상기 후단 공간(22)에서 상기 둘레 공간(18)에 배치된 산화촉매(28)를 통과하면서 산화 반응을 통해 잔류하는 메탄이 추가로 더 제거되며, 상기 산화촉매(28)를 통과한 배기가스는 반응기(16)의 전단 공간(20)으로 모여 배출관(24)을 따라 터보차저의 전단으로 배출되는 것을 특징으로 하는 선박용 고압 배기가스 처리장치.The exhaust pipe 14 through which the exhaust gas of the engine is exhausted is inserted into the reactor 16 in a structure that is drawn out from one side of the reactor 16,
At the front end of the reactor 16 into which the exhaust pipe 14 is inserted and the rear end corresponding to the front end, a front end space 20 and a rear end space 22 are formed, respectively,
The shear space 20 of the reactor 16 is in communication communication with the discharge pipe 24 connected to the front end of the turbocharger,
In the exhaust pipe 14 inserted into the reactor 16, a reducing catalyst 26 for removing methane and nitrogen oxide together is inserted in a batch direction blocking one or more exhaust gas flows,
In the circumferential space 18 formed between the outer circumference of the exhaust pipe 14 and the inner surface of the reactor 16, an oxidation catalyst 28 is disposed to block the exhaust gas flow in a form surrounding the circumference of the exhaust pipe 14 Fixed in the direction,
Exhaust gas from the engine to the exhaust pipe 14 passes through the reduction catalyst 26 disposed in the exhaust pipe 14 while methane and nitrogen oxides are simultaneously removed, and then the rear space of the reactor 16 ( 22), the methane remaining through the oxidation reaction while passing through the oxidation catalyst 28 disposed in the circumferential space 18 in the rear space 22 is further removed, and the oxidation catalyst 28 The high-pressure exhaust gas treatment system for ships, characterized in that the exhaust gas that passes through is gathered into the shear space 20 of the reactor 16 and discharged to the front end of the turbocharger along the discharge pipe 24. 삭제delete
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