KR20160102802A - SCR System for Diesel Engine With WHRS - Google Patents

SCR System for Diesel Engine With WHRS Download PDF

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Publication number
KR20160102802A
KR20160102802A KR1020150025341A KR20150025341A KR20160102802A KR 20160102802 A KR20160102802 A KR 20160102802A KR 1020150025341 A KR1020150025341 A KR 1020150025341A KR 20150025341 A KR20150025341 A KR 20150025341A KR 20160102802 A KR20160102802 A KR 20160102802A
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South Korea
Prior art keywords
exhaust pipe
exhaust gas
opening
exhaust
waste heat
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KR1020150025341A
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Korean (ko)
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이승민
권영우
한주석
박남기
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현대중공업 주식회사
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Priority to KR1020150025341A priority Critical patent/KR20160102802A/en
Publication of KR20160102802A publication Critical patent/KR20160102802A/en

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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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • 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
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/04—Methods of control or diagnosing
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • 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
    • 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
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Supercharger (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Provided is an SCR system for a diesel engine preventing nitrogen oxide in exhaust gas from being discharged when a waste heat recovery device is operated. The SCR system for a diesel engine can prevent nitrogen oxide included in exhaust gas that passed through a waste heat recovery device to the air by being improved that the exhaust gas supplied from the gas receiver passes through the waste heat recovery device after an SCR reactor rather than directly passing through the waste heat recovery device when the heat source of exhaust gas supplied from the gas receiver is used. The SCR system for a diesel engine preventing nitrogen oxide in exhaust gas comprises: a first exhaust tube connected between outlets of a turbo charger connecting an outlet of the exhaust gas receiver and an outlet tube; a first opening and closing valve installed at the first exhaust tube to be opened and closed so that the exhaust gas of the exhaust gas receiver is transferred to the turbo charger; a second exhaust tube connected from the first exhaust tube in a branch form; an SCR reactor connected with an inlet of the second exhaust tube; a third exhaust tube connected with an outlet of the SCR reactor; a fourth exhaust tube connected with the first exhaust tube in a branch form and integrally connected with an inlet of the waste heat recovery device; and a fifth exhaust tube connected with an outlet of the waste heat recovery device and the discharge tube.

Description

폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템{SCR System for Diesel Engine With WHRS}BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an SCR system for a diesel engine,

본 발명은 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템에 관한 것으로, 더욱 상세하게는 배기가스 리시버로부터 공급되는 배기가스의 열원을 이용시, 배기가스 리시버로부터 공급되는 배기가스가 폐열회수장치를 바로 통과하는 것이 아니라 SCR 반응기를 거친 후 폐열회수장치를 통과하도록 개선되어 폐열회수장치를 통과한 배기가스에 포함된 질소 산화물이 대기 중으로 배출되지 않도록 한 것이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an SCR system for a diesel engine which prevents the exhaust gas nitrogen oxides from being discharged during operation of a waste heat recovery apparatus and more particularly to a SCR system for a diesel engine which is supplied from an exhaust gas receiver The exhaust gas is improved not to pass directly through the waste heat recovery device but to pass through the waste heat recovery device after passing through the SCR reactor so that the nitrogen oxide contained in the exhaust gas passing through the waste heat recovery device is not discharged to the atmosphere.

선택적 촉매 환원 시스템(Selective Catalyst Reduction System)으로 불리는 SCR 시스템은, 특허문헌 1 내지 3 등으로 알려져 있듯이, 선박 추진용 디젤 엔진이나 플랜트 발전용 디젤 엔진으로부터 배출되는 배기 중의 질소산화물(NOx)을 선택적으로 제거하기 위한 시스템이다.The SCR system, which is referred to as a selective catalytic reduction system, selectively releases nitrogen oxides (NOx) in the exhaust gas discharged from a diesel engine for ship propulsion or a diesel engine for plant generation, as known in Patent Documents 1 to 3 System.

이러한 SCR 시스템은, 배기관의 도중에 촉매가 내장된 SCR 반응기를 설치해 두고, SCR 반응기의 상류 측에 분무용 노즐을 설치하며, 분무용 노즐에 요소수를 공급하기 위한 요소수 공급 장치를 구비한다.Such an SCR system is provided with a SCR reactor in which a catalyst is embedded in the middle of an exhaust pipe, a spray nozzle is provided on the upstream side of the SCR reactor, and a urea water supply device for supplying urea water to the spray nozzle.

엔진으로부터 SCR 반응기로 향하는 배기가스에 분무용 노즐로부터 요소수를 분무하면, 분무된 요소수 입자가 배기가스와 섞여 SCR 반응기로 들어가 촉매를 통과하게 되며, 촉매를 통과하는 과정에서 요소수로부터 가수분해된 암모니아와 배기가스가 반응을 일으켜 배기가스 중의 유해물질인 질소산화물이 질소와 수증기로 환원된 후 대기로 배출된다.When the urea water is sprayed from the atomizing nozzle to the exhaust gas flowing from the engine to the SCR reactor, the sprayed urea water particles are mixed with the exhaust gas to enter the SCR reactor and pass through the catalyst. During the passage through the catalyst, Ammonia and exhaust gas react with each other to reduce nitrogen oxides, which are harmful substances in the exhaust gas, to nitrogen and water vapor, and then to the atmosphere.

또한, 위와 같은 SCR 시스템에서 일반적으로 활용하고 있는 폐열회수장치는 가스리시버에 직접 연결하고, 가스리시버의 배기가스가 폐열회수장치를 통과하도록 하여 배기가스의 열원을 활용함으로써, 난방이나 온수, 스팀 생산 등 선내에 필요한 부분으로 활용하고 있다.In addition, the waste heat recovery device generally used in the above SCR system is directly connected to the gas receiver, and the exhaust gas of the gas receiver is passed through the waste heat recovery device to utilize the heat source of the exhaust gas to generate heat, It is used as a necessary part in the ship.

그런데, 국제 해사기구에서(IMO)는 선박엔진의 질소산화물 배출량을 규제하고 있으며 선박 대기오염규제 기준 중 질소산화물(NOx) 규제기준은 티어1(TierⅠ), 티어2(TierⅡ), 티어3(TierⅢ)으로 구분될 수 있다. 숫자가 높을수록 규제 강도가 높다.However, the International Maritime Organization (IMO) regulates the emission of nitrogen oxides in ship engines and the regulations for NOx in the air pollution standards for ships are Tier 1, Tier 2, Tier 3, ). The higher the number, the higher the regulatory intensity.

따라서, 상기 티어1(TierⅠ), 티어2(TierⅡ), 티어3(TierⅢ)로 규제된 지역 즉, 배기가스 통제지역(ECA : Emission Control Area)을 통과시에는 가스리시버의 배기가스가 폐열회수장치를 통해 대기 중으로 방출되지 않도록 가스리시버와 폐열회수장치 간 연결된 라인 상에 설치된 밸브를 폐쇄함으로써, 폐열회수장치의 가동이 중단되는 문제가 있었다.Therefore, when passing through a region regulated as Tier I, Tier II, or Tier III, that is, an emission control area (ECA), the exhaust gas of the gas receiver is supplied to the waste heat recovery device There is a problem in that the operation of the waste heat recovery apparatus is interrupted by closing the valve provided on the line connected between the gas receiver and the waste heat recovery apparatus.

위와 같은 문제로 인해 배기가스의 열원을 활용하지 못하게 됨으로써, 난방이나 온수, 스팀 생산 등 불편함이 발생하는 문제가 있었다.
The heat source of the exhaust gas can not be utilized due to the above problems, and there is a problem that inconvenience such as heating, hot water, and steam production occurs.

대한민국등록특허공보 등록번호 제10-0606438호Korean Registered Patent Publication No. 10-0606438

본 발명은 상기와 같은 문제를 해소하기 위하여 가스리시버로부터 공급되는 배기가스의 열원을 이용 시, 배기 가스리시버로부터 공급되는 배기가스가 폐열회수장치를 바로 통과하는 것이 아니라 SCR 반응기를 거친 후 폐열회수장치를 통과하도록 개선되어 폐열회수장치를 통과한 배기가스에 포함된 질소 산화물이 대기 중으로 배출되지 않도록 한 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템을 제공하는데 그 목적이 있다.
In order to solve the above-mentioned problems, the present invention has an object to provide an exhaust gas recycling apparatus and an exhaust gas recycling apparatus, in which exhaust gas supplied from an exhaust gas receiver passes through a waste heat recovery apparatus, To prevent the exhaust of nitrogen oxides contained in the exhaust gas passing through the waste heat recovering device from being discharged to the atmosphere. The present invention provides an SCR system for a diesel engine, .

상기의 목적을 달성하기 위하여, 본 발명에서는 배기가스 리시버의 출구와 배출관을 연결하고 있는 터보차저의 출구 간 연결되는 제1 배기관; 상기 제1 배기관에 설치되어 배기가스 리시버의 배기가스가 터보차저로 이송되는 것을 개폐하는 제1 개폐밸브; 상기 제1 배기관으로부터 분기 형태로 연결된 제2 배기관 및, 제2 배기관이 입구에 연결되는 SCR 반응기; 상기 SCR 반응기의 출구와 연결되는 제3배기관; 상기 제1 배기관과 분기 형태로 연결되며 폐열회수장치의 입구와 통합적으로 연결되는 제4 배기관; 상기 폐열회수장치의 출구와 배출관이 통하도록 연결되는 제5 배기관; 상기 제1 배기관에 설치되어 배기가스 리시버의 배기가스가 제1 배기관을 따라 터보차저로 이송되는 것을 개폐하는 제1 개폐밸브; 를 포함하여 구성되는 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템을 통해 목적을 달성할 수 있다.In order to achieve the above object, the present invention provides a first exhaust pipe connected between the outlets of a turbocharger connecting the outlet of the exhaust gas receiver and the exhaust pipe; A first opening / closing valve installed in the first exhaust pipe for opening / closing the exhaust gas of the exhaust gas receiver to be transferred to the turbocharger; A second exhaust pipe connected in a branched form from the first exhaust pipe, and an SCR reactor having a second exhaust pipe connected to the inlet thereof; A third exhaust pipe connected to an outlet of the SCR reactor; A fourth exhaust pipe connected in branch form to the first exhaust pipe and integrally connected to the inlet of the waste heat recovering device; A fifth exhaust pipe connected to the outlet of the waste heat recovery device so as to communicate with the exhaust pipe; A first opening / closing valve installed in the first exhaust pipe and opening / closing the exhaust gas of the exhaust gas receiver being transferred to the turbocharger along the first exhaust pipe; The present invention can achieve the object through the SCR system for the diesel engine which prevents the exhaust gas nitrogen oxides from being discharged during the operation of the waste heat recovery apparatus.

또한, 상기 제2 배기관에는 제1 배기관을 통해 터보차저로 이송되는 배기가스가 제2 배기관을 따라 SCR 반응기로 이송되도록 개폐하는 제2 개폐밸브가 설치되어 있고, 상기 제4 배기관에는 SCR 반응기를 통과하는 배기가스가 제1 배기관과 폐열회수장치의 입구로 각각 이송되는 것을 개폐하도록 제3 및 제4 개폐밸브가 각각 설치되어 있는 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템을 통해 목적을 달성할 수 있다.The second exhaust pipe is provided with a second opening / closing valve that opens and closes the exhaust gas to be delivered to the SCR reactor along the second exhaust pipe, and the fourth exhaust pipe is passed through the SCR reactor And the third and fourth open / close valves are respectively provided to open and close the exhaust gas discharged from the first exhaust pipe and the inlet of the waste heat recovering device, respectively, is used for a diesel engine The objective can be achieved through the SCR system.

또한, 상기 제5 배기관에는 폐열회수장치를 통과한 배기가스가 배출관으로 이송되는 것을 개폐하도록 제5 개폐밸브가 설치되어 있는 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템을 통해 목적을 달성할 수 있다.The fifth exhaust pipe is provided with a fifth open / close valve for opening / closing the exhaust gas passing through the waste heat recovering device to the discharge pipe. The waste heat recovering device includes a diesel engine SCR The system can achieve the purpose.

또한, 상기 제1 내지 제5 개폐밸브는 제1 내지 제5 개폐밸브의 개폐 동작 상태를 실시간으로 감지하는 제어부와 전기적으로 신호 연결되고, 상기 제어부는 제1 개폐밸브의 닫힘 동작, 제2 내지 제5 개폐밸브의 열림 동작이 감지될 때, 상기 제어부에 입력된 개도 량으로 제3 개폐밸브와 제4 개폐밸브의 개도 량이 조절되는 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템을 통해 목적을 달성할 수 있다.
In addition, the first to fifth open / close valves are electrically connected to a control unit that senses the opening and closing operation states of the first to fifth open / close valves in real time, and the control unit controls the closing operation of the first open / close valve, Closing valve and the fourth opening / closing valve is regulated by the amount of opening inputted to the control unit when the opening operation of the fifth opening / closing valve is sensed, the waste heat recovering device is provided with a diesel engine The purpose can be achieved through the SCR system.

본 발명에 따른 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템을 사용하게 되면, 티어1(TierⅠ), 티어2(TierⅡ), 티어3(TierⅢ)로 규제된 지역 즉, 배기가스 통제지역(ECA : Emission Control Area)을 통과 시, 배기 가스리시버로부터 공급되는 배기가스가 폐열회수장치를 바로 통과하는 것이 아니라 SCR 반응기를 거친 후 폐열회수장치를 통과하게 됨으로써, 배기가스 통제지역에서 운항 시, 폐열회수장치를 이용한 폐열의 활용이 중단되었던 문제를 해소할 수 있는 효과를 기대할 수 있다.
When an SCR system for diesel engines is used to prevent the emission of nitrogen oxides from the exhaust gas during the operation of the waste heat recovery apparatus according to the present invention, a region regulated as Tier 1, Tier 2, and Tier III That is, when passing through an emission control area (ECA), exhaust gas supplied from an exhaust gas receiver passes through a waste heat recovery device after passing through an SCR reactor instead of passing through a waste heat recovery device, It can be expected that the problem that the use of waste heat using the waste heat recovery device is stopped when operating in the controlled area can be expected to be solved.

도 1a 내지 도 1c는 본 발명에 따른 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템을 나타낸 것으로, 도 1a는 배기가스가 SCR 반응기를 통과하지 않는 흐름을 나타낸 운전이고, 도 1b는 배기가스가 SCR 반응기를 통과하는 흐름을 나타낸 운전이며, 도 1C는 배기가스가 SCR 반응기를 거쳐 폐열회수장치를 통과하는 흐름을 나타낸 운전이다.The present invention relates to a diesel engine SCR system for preventing the exhaust of nitrogen oxides from exhaust gases during operation of a waste heat recovering apparatus according to the present invention, 1B is an operation showing the flow of the exhaust gas through the SCR reactor, and FIG. 1C is an operation showing the flow of the exhaust gas passing through the SCR reactor through the waste heat recovery apparatus.

이하, 첨부도면을 참조하면서 본 발명에 따른 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템을 구체적으로 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an SCR system for a diesel engine will be described in detail with reference to the accompanying drawings to prevent the exhaust gas nitrogen oxides from being discharged during operation of the waste heat recovery apparatus according to the present invention.

도 1a에 도시된 바와 같이 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템(이하, SCR 시스템으로 칭함 10)은 디젤 엔진(12)의 실린더마다 배출되는 배기가스를 한 곳에 모으기 위하여 용적이 확장된 배기가스 리시버(Exhaust Gas Receiver)(14)가 설치된다.As shown in FIG. 1A, an SCR system for diesel engine (hereinafter referred to as SCR system) 10 for preventing the exhaust of nitrogen oxides from exhaust gases during operation of a waste heat recovery apparatus (hereinafter referred to as an SCR system) And an exhaust gas receiver 14 having an expanded volume is installed for collecting in one place.

상기 배기가스 리시버(14)의 출구에는 제1 배기관(16)이 연결되며, 이와 같이 연결되는 제1 배기관(16)은 터보차저(18)와 연결되며, 상기 터보차저(18)에는 배기가스를 외부로 배출시키기 위한 배출관(20)이 연결되어 있다.A first exhaust pipe 16 is connected to an outlet of the exhaust gas receiver 14 and a first exhaust pipe 16 connected to the exhaust gas receiver 14 is connected to a turbocharger 18. The exhaust gas is supplied to the turbocharger 18 And a discharge pipe 20 for discharge to the outside is connected.

또한, 상기 제1 배기관(16)으로부터 분기 형태로 연결되는 제2 배기관(22)은 SCR 반응기(24)의 입구와 연결되고, 상기 SCR 반응기(24)의 출구와 연결되는 제3 배기관(26)은 상기 제1 배기관(16) 및 폐열회수장치(28)의 입구와 통합적으로 연결된 제4 배기관(30)과 연결되어 있으며, 상기 폐열회수장치(28)의 출구와 연결되는 제5 배기관(32)은 상기 배출관(20)과 통하도록 연결되어 있다.A second exhaust pipe 22 branched from the first exhaust pipe 16 is connected to the inlet of the SCR reactor 24 and connected to an outlet of the SCR reactor 24. The third exhaust pipe 26, Is connected to a fourth exhaust pipe (30) integrally connected to the first exhaust pipe (16) and the inlet of the waste heat recovering device (28), and a fifth exhaust pipe (32) connected to the outlet of the waste heat recovering device (28) Is connected to the discharge pipe (20).

한편, 상기 제1 배기관(16)에는 배기가스 리시버(14)의 배기가스가 제1 배기관(16)을 따라 터보차저(18)로 이송되는 것을 개폐하기 위한 제1 개폐밸브(34)가 설치되어 있다.The first exhaust pipe 16 is provided with a first opening and closing valve 34 for opening and closing the exhaust gas from the exhaust gas receiver 14 to the turbocharger 18 along the first exhaust pipe 16 have.

또한, 상기 제2 배기관(22)에는 배기가스 리시버(14)의 배기가스가 제2 배기관(22)을 통해 SCR 반응기(24)로 이송되는 것을 개폐하기 위한 제2 개폐밸브(36)가 설치되어 있다.The second exhaust pipe 22 is provided with a second on-off valve 36 for opening and closing the exhaust gas from the exhaust gas receiver 14 to the SCR reactor 24 through the second exhaust pipe 22 have.

또한, 상기 제4 배기관(30)에는 SCR 반응기(24)를 통과하는 배기가스가 제1 배기관(16)과 폐열회수장치(28)의 입구로 각각 이송되는 것을 개폐하기 위한 제3 개폐밸브(38)와 제4 개폐밸브(40)가 해당 위치에 각각 설치되어 있고, 상기 제5 배기관(32)에도 제5 개폐밸브(42)가 설치되어 있다. The third exhaust pipe 30 is connected to a third open / close valve 38 for opening and closing the exhaust gas passing through the SCR reactor 24 to the inlet of the first exhaust pipe 16 and the waste heat recovering device 28, respectively And a fourth open / close valve 40 are provided at the corresponding positions, respectively, and a fifth open / close valve 42 is also provided at the fifth exhaust pipe 32.

또한, 상기 제1 내지 제5 개폐밸브(34, 36, 38, 40, 42)는 개도를 조절하는 있는 전자식 버터플라이밸브의 사용이 바람직하며, 아울러 개폐 작동은 물론, 개도 조절을 위해 제어부(C)와 전기적으로 신호 연결된다.
It is preferable to use an electronic butterfly valve for controlling the opening degree of the first to fifth open / close valves 34, 36, 38, 40, 42. In addition, ). ≪ / RTI >

하기에서는 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템에 대한 모드 별로 설명하기로 한다.In the following, modes of the SCR system for a diesel engine for preventing the exhaust gas nitrogen oxides from being discharged during the operation of the waste heat recovery apparatus will be described by mode.

[SCR 반응기(24) 및 폐열회수장치(28) 미 운전시][When the SCR reactor (24) and the waste heat recovery apparatus (28) are not operated)

먼저, 도 1a에 도시된 바와 같이 제1 배기관(16)에 설치된 제1 개폐밸브(34)는 열림 작동시키고, 제2 배기관(22), 제4 배기관(30), 제5 배기관(32)에 각각 설치된 제2 개폐밸브(36), 제3 개폐밸브(38), 제4 개폐밸브(40), 제5 개폐밸브(42)는 닫힘 작동시킨다.First, as shown in FIG. 1A, the first on-off valve 34 installed in the first exhaust pipe 16 is opened and the second exhaust pipe 22, the fourth exhaust pipe 30 and the fifth exhaust pipe 32 are opened The second on-off valve 36, the third on-off valve 38, the fourth on-off valve 40, and the fifth on-off valve 42, respectively.

위와 같이 상기 제1 내지 제5 개폐밸브(34, 36, 38, 40, 42)가 각각 개폐된 상태에서 디젤 엔진(12)의 실린더마다 배출되는 배기가스는 배기가스 리시버(14)로 모이게 되고, 이와 같이 모인 배기가스는 제1 개폐밸브(34)의 열림 작동과 제2 및 제3 개폐밸브(36, 38)의 닫힘 작동에 의해 제1 배기관(16)을 따라 터보차저(18)로 모두 이송되며, 상기 터보차저(18)를 통과한 배기가스는 배출관(20)을 통해 대기로 배출되게 된다.
Exhaust gas discharged from each cylinder of the diesel engine 12 is collected in the exhaust gas receiver 14 in a state where the first to fifth opening / closing valves 34, 36, 38, 40 and 42 are opened and closed, The collected exhaust gas is entirely conveyed to the turbocharger 18 along the first exhaust pipe 16 by the opening operation of the first opening / closing valve 34 and the closing operation of the second and third opening / closing valves 36 and 38 And the exhaust gas that has passed through the turbocharger 18 is discharged to the atmosphere through the exhaust pipe 20.

[SCR 반응기(24) 운전 및 폐열회수장치(28) 미 운전시][SCR reactor (24) operation and waste heat recovery device (28)

먼저, 도 1b에 도시된 바와 같이 제1 배기관(16)에 설치된 제1 개폐밸브(34)는 닫힘 작동시키고, 제2 및 제4 배기관(22, 30)에 각각 설치된 제2 개폐밸브(36) 및 제3 개폐밸브(38)는 열림 작동시키며, 제4 배기관(30)의 제4 개폐밸브(40)와 제5 배기관(32)의 제5 개폐밸브(42)는 모두 닫힘 작동시킨다.1B, the first on-off valve 34 provided in the first exhaust pipe 16 is closed and the second on-off valve 36 provided on the second and fourth exhaust pipes 22 and 30 is closed. And the third opening and closing valve 38 are opened and the fourth opening and closing valve 40 of the fourth exhaust pipe 30 and the fifth opening and closing valve 42 of the fifth exhaust pipe 32 are both closed.

위와 같이 제1 내지 제5 개폐밸브(34, 36, 38, 40, 42)가 각각 개폐된 상태에서 디젤 엔진(12)의 실린더마다 배출되는 배기가스는 배기가스 리시버(14)로 모이게 되고, 이와 같이 모인 배기가스는 제1 개폐밸브(34)의 닫힘 작동과 제2 및 제3 개폐밸브(36, 38)의 열림 작동 및 제4 개폐밸브(40)의 닫힘 작동에 의해 제2 배기관(22)을 따라 SCR 반응기(24)를 통과하게 된다.Exhaust gas discharged from each cylinder of the diesel engine 12 is collected in the exhaust gas receiver 14 while the first to fifth opening / closing valves 34, 36, 38, 40 and 42 are opened and closed, Exhaust gas collected together is discharged from the second exhaust pipe 22 by the closing operation of the first opening / closing valve 34, the opening operation of the second and third opening / closing valves 36 and 38, and the closing operation of the fourth opening / Through the SCR reactor (24).

상기 SCR 반응기(24)를 통과한 배기가스는 제3 배기관(26) - 제4 배기관(30) - 제1 배기관(16) - 터보차저(18) 순으로 이동하면서 최종적으로는 터보차저의 출구에 연결된 배출관(20)을 통해 배출되게 된다.The exhaust gas that has passed through the SCR reactor 24 moves in the order of the third exhaust pipe 26 to the fourth exhaust pipe 30 to the first exhaust pipe 16 to the turbocharger 18 and finally to the outlet of the turbocharger And then discharged through the connected discharge pipe 20.

이때, 앞서 설명된 바와 같이 제4 개폐밸브(40)의 닫힘 작동에 의해 제4 배기관(30)에 존재하는 배기가스는 폐열회수장치(28)를 통과하지 못하게 된다.At this time, the exhaust gas existing in the fourth exhaust pipe 30 can not pass through the waste heat recovering device 28 by the closing operation of the fourth opening / closing valve 40, as described above.

[SCR 반응기(24) 운전 및 폐열회수장치(28) 운전시][Operation of SCR reactor (24) and operation of waste heat recovery device (28)]

먼저, 도 1c에 도시된 바와 같이 제1 배기관(16)에 설치된 제1 개폐밸브(34)는 닫힘 작동시키고, 제2 및 제4 배기관(22, 30)에 각각 설치된 제2 개폐밸브(36)는 열림 작동, 제3 개폐밸브(38)는 열림 작동시키며, 제4 배기관(30)의 제4 개폐밸브(40)와 제5 배기관(32)의 제5 개폐밸브(42)는 모두 열림 작동시키게 된다.1C, the first on-off valve 34 provided in the first exhaust pipe 16 is closed and the second on-off valve 36 provided on the second and fourth exhaust pipes 22 and 30 is closed. Closing valve 38 of the fourth exhaust pipe 30 and the fifth opening and closing valve 42 of the fifth exhaust pipe 32 are both opened and the third opening and closing valve 38 is opened and the fourth opening and closing valve 40 of the fourth exhaust pipe 30 and the fifth opening and closing valve 42 of the fifth exhaust pipe 32 are both opened do.

위와 같이 제1 내지 제5 개폐밸브(34, 36, 38, 40, 42)가 각각 개폐된 상태에서 디젤 엔진(12)의 실린더마다 배출되는 배기가스는 배기가스 리시버(14)로 모이게 되고, 이와 같이 모인 배기가스는 제1 개폐밸브(34)의 닫힘과 제2 개폐밸브(36)의 열림에 의해 제2 배기관(22)을 따라 SCR 반응기(24)를 통과하게 된다.Exhaust gas discharged from each cylinder of the diesel engine 12 is collected in the exhaust gas receiver 14 while the first to fifth opening / closing valves 34, 36, 38, 40 and 42 are opened and closed, The exhaust gas collected together passes through the SCR reactor 24 along the second exhaust pipe 22 by closing the first opening / closing valve 34 and opening the second opening / closing valve 36.

위와 같이 상기 SCR 반응기(24)를 통과하는 배기가스는 제3 개폐밸브(38)의 닫힘과 제4 및 제5 개폐밸브(40, 42)의 열림에 의해 폐열회수장치(28)를 통과 한 후, 터보차저(18)의 배출관(20)을 통해 배출되게 된다.As described above, the exhaust gas passing through the SCR reactor 24 passes through the waste heat recovering device 28 by closing the third on-off valve 38 and opening the fourth and fifth on-off valves 40 and 42 , And is discharged through the discharge pipe (20) of the turbocharger (18).

위와 같이 SCR 반응기(24) 및 폐열회수장치(28) 운전이 모두 이루어지는 모드 전환시, 제1 내지 제5 개폐밸브(34, 36, 38, 40, 42)의 열림 동작 상태를 실시간으로 감지하고 있는 제어부(C)가 제1 개폐밸브(34)는 닫힘 작동 상태를 감지하고, 제2 내지 제5 개폐밸브(36, 38, 40)는 열림 상태를 감지하게 되면, 상기 제어부(C)에서는 사전에 입력된 개도 량 조절 프로그램이 자동 실행되어 예를 들면, 상기 제3 개폐밸브(38)와 제4 개폐밸브(40)의 개도가 사전 입력된 개도 량으로 조절된다. When the mode switching is performed in which both the SCR reactor 24 and the waste heat recovering device 28 are operated as described above, the opening operation states of the first to fifth open / close valves 34, 36, 38, 40, When the controller C senses the closed operation state of the first on-off valve 34 and detects the open state of the second to fifth on-off valves 36, 38 and 40, For example, the opening degree of the third on-off valve 38 and the fourth on-off valve 40 is adjusted to the opening amount pre-inputted.

다시 말해, 상기 SCR 반응기(24)를 통과하는 배기가스가 제4 배기관(30)을 통해 터보차저(18)와 폐열회수장치(28)로 분산 이송될 때, 터보차저(18)로 이송되는 배기가스 이송 량과 폐열회수장치(28)로 이송되는 배기가스 이송 량을 동일하게 하거나 또는 이송 량이 서로 다르게 가변할 수 있다.
In other words, when the exhaust gas passing through the SCR reactor 24 is dispersedly transferred to the turbocharger 18 and the waste heat recovering device 28 through the fourth exhaust pipe 30, the exhaust gas to be delivered to the turbocharger 18 The amount of gas transferred and the amount of exhaust gas transferred to the waste heat recovering device 28 may be the same or the amount of transferred gas may be varied.

따라서, 본 발명에 따른 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템을 적용하게 되면, 상기 티어1(TierⅠ), 티어2(TierⅡ), 티어3(TierⅢ)로 규제된 지역 즉, 배기가스 통제지역(ECA : Emission Control Area)을 통과시에도 [SCR 반응기 운전 및 폐열회수장치 운전시]에 따른 운전 모드가 가능하여 폐열회수장치의 가동 중단을 방지할 수 있게 됨으로써, 배기가스의 열원을 활용하는 난방이나 온수, 스팀 생산 등 불편함을 해소할 수 있게 된다.Accordingly, when the SCR system for the diesel engine is used to prevent the emission of the exhaust gas nitrogen oxides during the operation of the waste heat recovery apparatus according to the present invention, the Tier 1, Tier 2, and Tier III The operation mode according to the operation of the SCR reactor and the waste heat recovering device can be performed even when passing through the regulated area, that is, the emission control area (ECA), thereby preventing the waste heat recovery device from being shut down , The inconvenience such as heating, hot water, and steam production utilizing the heat source of the exhaust gas can be solved.

이상에서는 본 발명의 특정의 바람직한 실시예에 대하여 도시하고 또한 설명하였다. 그러나 본 발명은 상술한 실시예에 한정되지 아니하며, 특허청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능할 것이다.
The foregoing is a description of certain preferred embodiments of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein, but may be modified and altered without departing from the spirit and scope of the invention as defined in the appended claims.

10 : SCR 시스템 12 : 디젤 엔진
14 : 배기가스 리시버 16 : 제1 배기관
18 : 터보차저 20 : 배출관
22 : 제2 배기관 24 : SCR 반응기
26 : 제3 배기관 28 : 폐열회수장치
30 : 제4 배기관 32 :제5 배기관
34 : 제1 개폐밸브 36 : 제2 개폐밸브
38 : 제3 개폐밸브 40 : 제4 개폐밸브
42 : 제5 개폐밸브10: SCR system 12: Diesel engine
14: exhaust gas receiver 16: first exhaust pipe
18: turbocharger 20: discharge pipe
22: Second exhaust pipe 24: SCR reactor
26: third exhaust pipe 28: waste heat recovery device
30: fourth exhaust pipe 32: fifth exhaust pipe
34: first open / close valve 36: second open / close valve
38: third open / close valve 40: fourth open / close valve
42: fifth opening / closing valve

Claims (4)

배기가스 리시버의 출구와 배출관을 연결하고 있는 터보차저의 출구 간 연결되는 제1 배기관;
상기 제1 배기관에 설치되어 배기가스 리시버의 배기가스가 터보차저로 이송되는 것을 개폐하는 제1 개폐밸브;
상기 제1 배기관으로부터 분기 형태로 연결된 제2 배기관 및, 제2 배기관이 입구에 연결되는 SCR 반응기;
상기 SCR 반응기의 출구와 연결되는 제3배기관;
상기 제1 배기관과 분기 형태로 연결되며 폐열회수장치의 입구와 통합적으로 연결되는 제4 배기관;
상기 폐열회수장치의 출구와 배출관이 통하도록 연결되는 제5 배기관;
상기 제1 배기관에 설치되어 배기가스 리시버의 배기가스가 제1 배기관을 따라 터보차저로 이송되는 것을 개폐하는 제1 개폐밸브;
를 포함하여 구성되는 것을 특징으로 하는 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템.
A first exhaust pipe connected between the outlets of the turbocharger connecting the outlet of the exhaust gas receiver and the exhaust pipe;
A first opening / closing valve installed in the first exhaust pipe for opening and closing the exhaust gas of the exhaust gas receiver to be transferred to the turbocharger;
A second exhaust pipe connected in a branched form from the first exhaust pipe, and an SCR reactor having a second exhaust pipe connected to the inlet thereof;
A third exhaust pipe connected to an outlet of the SCR reactor;
A fourth exhaust pipe connected in branch form to the first exhaust pipe and integrally connected to the inlet of the waste heat recovering device;
A fifth exhaust pipe connected to the outlet of the waste heat recovery device so as to communicate with the exhaust pipe;
A first opening / closing valve installed in the first exhaust pipe and opening / closing the exhaust gas of the exhaust gas receiver to be transferred to the turbocharger along the first exhaust pipe;
Wherein the exhaust gas recirculation system is disposed in the exhaust gas recirculation system.
제 1항에 있어서,
상기 제2 배기관에는 제1 배기관을 통해 터보차저로 이송되는 배기가스가 제2 배기관을 따라 SCR 반응기로 이송되도록 개폐하는 제2 개폐밸브가 설치되어 있고,
상기 제4 배기관에는 SCR 반응기를 통과하는 배기가스가 제1 배기관과 폐열회수장치의 입구로 각각 이송되는 것을 개폐하도록 제3 및 제4 개폐밸브가 각각 설치되어 있는 것을 특징으로 하는 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템.
The method according to claim 1,
The second exhaust pipe is provided with a second opening / closing valve that opens and closes the exhaust gas, which is transferred to the turbocharger through the first exhaust pipe, to the SCR reactor along the second exhaust pipe.
Wherein the fourth exhaust pipe is provided with third and fourth open / close valves for opening and closing the exhaust gas passing through the SCR reactor to the first exhaust pipe and the inlet of the waste heat recovering device, respectively. SCR system for diesel engines to prevent emissions of NOx from the exhaust gas at the time.
제 2항에 있어서,
상기 제5 배기관에는 폐열회수장치를 통과한 배기가스가 배출관으로 이송되는 것을 개폐하도록 제5 개폐밸브가 설치되어 있는 것을 특징으로 하는 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템.
3. The method of claim 2,
Wherein the fifth exhaust pipe is provided with a fifth opening / closing valve for opening / closing the exhaust gas passing through the waste heat recovering device to be transferred to the exhaust pipe. The waste heat recovering device according to claim 1, SCR system for.
제 3항에 있어서,
상기 제1 내지 제5 개폐밸브는 제1 내지 제5 개폐밸브의 개폐 동작 상태를 실시간으로 감지하는 제어부와 전기적으로 신호 연결되고, 상기 제어부는 제1 개폐밸브의 닫힘 동작, 제2 내지 제5 개폐밸브의 열림 동작이 감지될 때, 상기 제어부에 입력된 개도 량으로 제3 개폐밸브와 제4 개폐밸브의 개도 량이 조절되는 것을 특징으로 하는 폐열회수장치를 운전 시 배기가스 질소 산화물의 배출을 방지하는 디젤 엔진용 SCR 시스템. The method of claim 3,
The first to fifth open / close valves are electrically connected to a control unit for sensing the opening and closing operation states of the first to fifth open / close valves in real time, and the control unit is operable to close the first and second open / Wherein when the opening operation of the valve is sensed, the amount of opening of the third opening / closing valve and the opening / closing valve of the fourth opening / closing valve is adjusted by the amount of opening inputted to the control unit. SCR system for diesel engines.
KR1020150025341A 2015-02-23 2015-02-23 SCR System for Diesel Engine With WHRS KR20160102802A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180036309A (en) * 2016-09-30 2018-04-09 삼성중공업 주식회사 Exhaust gas expulsion apparatus for ships

Citations (1)

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Publication number Priority date Publication date Assignee Title
KR100606438B1 (en) 2005-08-19 2006-08-01 한국전력기술 주식회사 Flue gas treatment system to recover exhaust heat from the downstream of scr

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100606438B1 (en) 2005-08-19 2006-08-01 한국전력기술 주식회사 Flue gas treatment system to recover exhaust heat from the downstream of scr

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180036309A (en) * 2016-09-30 2018-04-09 삼성중공업 주식회사 Exhaust gas expulsion apparatus for ships

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