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KR20160110005A - Selective catalytic reduction system - Google Patents

Selective catalytic reduction system Download PDF

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Publication number
KR20160110005A
KR20160110005A KR1020150090867A KR20150090867A KR20160110005A KR 20160110005 A KR20160110005 A KR 20160110005A KR 1020150090867 A KR1020150090867 A KR 1020150090867A KR 20150090867 A KR20150090867 A KR 20150090867A KR 20160110005 A KR20160110005 A KR 20160110005A
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South Korea
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scr
exhaust gas
hydrolysis
temperature
urea
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KR1020150090867A
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Korean (ko)
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김규종
김정래
양희성
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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
    • F01N3/18—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]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2896—Liquid catalyst carrier
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/14—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel burner
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/25—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an ammonia generator
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/022—Exhaust treating devices having provisions not otherwise provided for for cooling the device using air
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. 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
    • 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
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1811—Temperature
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Supercharger (AREA)

Abstract

The present invention relates to an SCR device. In order to control temperature in a urea hydrolysis chamber into an optimal urea hydrolysis temperature, the present invention is capable of omitting an extra air supply line, required for the temperature control of the urea hydrolysis chamber, by lowering the temperature of SCR exhaust gas through a heat exchanger and using the gas as air for cooling the urea hydrolysis chamber. According to the present invention, the SCR device comprises: an SCR reactor providing a space in which a reducing agent makes a reducing reaction of a nitrogen oxide; an urea hydrolysis device comprising a heating unit and a hydrolysis chamber in order to form the reducing agent by hydrolyzing urea; an SCR exhaust pipe connected with the inside of the hydrolysis chamber to inject the SCR exhaust gas, emitted from the SCR reactor, into the hydrolysis chamber; and a heat exchanger installed in a section of the SCR exhaust pipe to cool the SCR exhaust gas.

Description

SCR 장치{Selective catalytic reduction system}SCR (Selective catalytic reduction system)

본 발명은 SCR 장치에 관한 것으로서, 보다 상세하게는 우레아 가수분해 챔버 내부의 온도를 최적의 우레아 가수분해 온도로 조절함에 있어서, 열교환기를 통해 SCR 배기가스의 온도를 낮추고 이를 우레아 가수분해 챔버의 냉각용 공기로 이용함으로써 배기가스의 폐열을 회수함과 동시에 우레아 가수분해챔버를 컴팩트하게 설계할 수 있는 SCR 장치에 관한 것이다.
The present invention relates to an SCR apparatus, and more particularly, to a method for controlling the temperature of an urea hydrolysis chamber to an optimal urea hydrolysis temperature by lowering a temperature of an SCR exhaust gas through a heat exchanger, The present invention relates to an SCR apparatus capable of recovering waste heat of an exhaust gas and designing a urea hydrolysis chamber in a compact manner.

선박의 배기가스에 포함되어 있는 질소산화물(NOx) 및 황산화물은 국제해사기구(IMO, International Maritime Organization)에 의해 배출규제를 받고 있는 대표적인 대기오염물질이다. Nitrogen oxides (NO x ) and sulfur oxides contained in the ship's exhaust are representative air pollutants subject to emission regulation by the International Maritime Organization (IMO).

질소산화물을 제거하기 위해 선박에는 통상, 선택적촉매환원 장치(selective catalytic reduction system)(이하, SCR 장치라 함)가 구비된다(한국공개특허 제2012-30553호 참조). SCR 장치는 촉매가 내장된 SCR 반응기, SCR 반응기 내에 암모니아(NH3)와 같은 환원제를 공급하는 환원제 공급장치를 포함하여 구성된다. In order to remove nitrogen oxides, a ship is usually equipped with a selective catalytic reduction system (hereinafter referred to as SCR device) (Korean Patent Publication No. 2012-30553). The SCR apparatus includes a SCR reactor having a catalyst and a reducing agent supply unit for supplying a reducing agent such as ammonia (NH 3 ) in the SCR reactor.

SCR 장치에 의한 질소산화물 제거는 다음과 같은 과정으로 진행된다. 엔진의 배기가스가 SCR 반응기에 유입되는 상태에서 SCR 반응기 내에 암모니아(NH3)가 공급되면, 암모니아(NH3)가 배기가스와 섞여 촉매를 통과하게 되며 촉매를 통과하는 과정에서 암모니아(NH3)가 배기가스 내의 질소산화물(NOx)과 반응하여 질소산화물(NOx)이 질소(N2)와 수증기로 환원된다. The removal of nitrogen oxide by the SCR apparatus proceeds as follows. When the ammonia (NH 3) is supplied into the SCR reactor in a state in which the exhaust gas of the engine flowing into the SCR reactor, ammonia (NH 3) that is to be mixed with the exhaust gas passing through the catalyst ammonia in the course of passing through the catalyst (NH 3) is reacted with nitrogen oxide (NO x) in exhaust gas of nitrogen oxides (NO x) are reduced to nitrogen (N 2) and water vapor.

질소산화물(NOx)의 환원제로 사용되는 암모니아(NH3)는 우레아(Urea, CO(NH2)2)의 가수분해에 의해 생성되며, SCR 장치에는 우레아를 가수분해하기 위한 우레아 가수분해장치가 필수적으로 구비된다. 우레아 가수분해장치는 우레아를 가수분해 온도까지 가열하기 위한 히터 또는 버너 등의 가열수단과, 우레아의 가수분해 공간을 제공하는 가수분해 챔버를 구비한다(한국등록특허 제141726호 참조). Ammonia (NH 3 ) used as a reducing agent of nitrogen oxides (NO x ) is produced by the hydrolysis of urea (Urea, CO (NH 2 ) 2 ), and in the SCR apparatus, urea hydrolysis apparatus . The urea hydrolysis apparatus has a heating means such as a heater or a burner for heating the urea to the hydrolysis temperature and a hydrolysis chamber for providing the hydrolysis space of the urea (see Korean Patent No. 141726).

우레아의 가수분해 과정을 살펴보면, 가열수단을 통해 가수분해 챔버 내부의 온도를 우레아 가수분해 온도 이상으로 가열시킨 후, 가수분해 챔버에 연소용 공기외에 과잉으로 냉각용 공기(cooling air)를 주입하여 최적의 가수분해 온도로 제어한 상태에서 가수분해 챔버 내에 우레아를 공급함으로써 우레아의 가수분해가 진행되도록 한다. 이와 같은 우레아 가수분해 과정에 있어서, 가수분해 챔버 내부의 온도를 냉각시키기 위해 가수분해 챔버로의 냉각용 과잉공기 주입이 필수적으로 요구되며, 이는 연료의 완전연소에 필요한 이론공기량 외에 추가적으로 과잉공기가 버너로 주입되어야 하므로 버너의 에너지 효율을 저하시키는 원인이 되며 과잉공기로 만으로 가수분해에 적합한 온도로 연소가스를 쿨링하지 못할 경우에는 추가적으로 냉각용 공기의 주입을 위해 별도의 공기공급라인이 필요하다. 또한 다량의 과잉공기의 사용은 엔진의 배기가스 외에 추가적인 상온의 공기가 사용되므로 SCR 시스템의 에너지 효율 저하의 원인이 된다.As for the hydrolysis process of urea, the temperature inside the hydrolysis chamber is heated to the urea hydrolysis temperature or higher through a heating means, and the cooling air is excessively injected into the hydrolysis chamber in addition to the combustion air, The urea is supplied into the hydrolysis chamber in a state where the hydrolysis temperature of the urea is controlled. In such a urea hydrolysis process, excess air injection for cooling into the hydrolysis chamber is required to cool the temperature inside the hydrolysis chamber. In addition to the theoretical air amount required for complete combustion of the fuel, It is necessary to inject an additional air supply line for the additional cooling air if the combustion gas can not be cooled to a temperature suitable for hydrolysis only by excess air. In addition, the use of a large amount of excess air causes the energy efficiency of the SCR system to be lowered because additional room temperature air is used in addition to the exhaust gas of the engine.

한편, 가수분해장치에 SCR 배기가스 공급장치(170)에 의한 엔진 배기가스의 우레아 가수분해챔버로의 공급은 온도가 200~300 로 상온의 공기보다 온도가 높고 이미 연소된 엔진 배기가스이므로 엔진 배기시스템의 효율에는 영향을 미치지 않지만 상온의 연소용 또는 과잉공기보다 온도가 높으므로 우레아 가수분해에 적합한 550 정도의 온도까지 냉각시키는데 많은 SCR배기가스가 필요하므로 우레아 가수분해챔버가 커져 설비비가 증가하게 되며, 또한 이는 한정된 공간에 설치되어야 하는 선박의 특성상 단점이 된다.
On the other hand, the supply of the engine exhaust gas to the urea hydrolysis chamber of the SCR exhaust gas supply device 170 by the SCR exhaust gas supply device is 200 to 300 at the temperature of the hydrolysis device, and since the temperature of the exhaust gas is already burned, Although the efficiency of the system is not affected, since the temperature is higher than that of the combustion or excess air at room temperature, a large number of SCR exhaust gases are required to cool to a temperature of about 550, which is suitable for urea hydrolysis, and thus the urea hydrolysis chamber becomes large, This is also a disadvantage due to the characteristics of a ship which must be installed in a limited space.

한국공개특허 제2012-30553호Korea Patent Publication No. 2012-30553 한국등록특허 제141726호Korean Patent No. 141726

본 발명은 상기와 같은 문제점을 해결하기 위해 안출한 것으로서, 우레아 가수분해 챔버 내부의 온도를 최적의 우레아 가수분해 온도로 조절함에 있어서, 열교환기를 통해 SCR 배기가스의 온도를 낮추고 이를 우레아 가수분해 챔버의 냉각용 공기로 이용함으로써 우레아 가수분해 챔버의 온도 조절에 요구되는 별도의 공기공급라인을 생략할 수 있는 SCR 장치를 제공하는데 그 목적이 있다.
DISCLOSURE Technical Problem The present invention has been devised to solve the above problems and it is an object of the present invention to reduce the temperature of the SCR exhaust gas through the heat exchanger in the urea hydrolysis chamber by adjusting the temperature of the urea hydrolysis chamber to the optimal urea hydrolysis temperature, It is an object of the present invention to provide an SCR apparatus which can eliminate the separate air supply line required for the temperature control of the urea hydrolysis chamber by using it as cooling air.

상기의 목적을 달성하기 위한 본 발명에 따른 SCR 장치는 환원제에 의한 질소산화물의 환원 반응이 진행되는 공간을 제공하는 SCR 반응기; 가열수단과 가수분해 챔버를 포함하여 구성되어, 우레아를 가수분해하여 환원제를 생성하는 우레아 가수분해장치; 상기 가수분해 챔버의 내측에 연결되어, SCR 반응기로부터 배출되는 SCR 배기가스를 가수분해 챔버 내부에 주입하는 SCR 배기관; 및 상기 SCR 배기관의 일 구간에 구비되어, SCR 배기가스를 냉각시키는 열교환기를 포함하여 이루어지는 것을 특징으로 한다. According to an aspect of the present invention, there is provided an SCR apparatus comprising: a SCR reactor for providing a space in which a reduction reaction of nitrogen oxides by a reducing agent proceeds; A urea hydrolyzing device, comprising a heating means and a hydrolysis chamber, for hydrolyzing urea to produce a reducing agent; An SCR exhaust pipe connected to the inside of the hydrolysis chamber and injecting the SCR exhaust gas discharged from the SCR reactor into the hydrolysis chamber; And a heat exchanger provided in one section of the SCR exhaust pipe for cooling the SCR exhaust gas.

온도센서, SCR 배기가스 공급장치 및 제어장치가 더 구비되며, 상기 온도센서는 가수분해 챔버 내부에 구비되어 가수분해 챔버 내부의 온도를 측정하며, 상기 SCR 배기가스 공급장치는 가수분해 챔버로 공급되는 SCR 배기가스(열교환기에 의해 냉각된)의 양을 조절하며, 상기 제어장치는 상기 온도센서에 의해 센싱된 온도 신호를 바탕으로 SCR 배기가스 공급장치를 통해 가수분해 챔버로 공급되는 SCR 배기가스(열교환기에 의해 냉각된)의 양을 제어한다. A temperature sensor, an SCR exhaust gas supply device, and a control device, wherein the temperature sensor is provided inside the hydrolysis chamber to measure a temperature inside the hydrolysis chamber, and the SCR exhaust gas supply device supplies the hydrolysis chamber The SCR exhaust gas (cooled by the heat exchanger) is controlled by the control device, and the control device controls the SCR exhaust gas supplied to the hydrolysis chamber through the SCR exhaust gas supply device based on the temperature signal sensed by the temperature sensor And cooled by the heater).

상기 제어장치는 미리 설정된 <온도 신호에 따른 SCR 배기가스의 공급량 정보>를 바탕으로 상기 온도센서로부터 입력되는 온도 신호에 대응하여 특정량의 냉각된 SCR 배기가스가 상기 가수분해 챔버 내부에 공급되도록 제어할 수 있다.
The control device controls the SCR exhaust gas to be supplied to the inside of the hydrolysis chamber in accordance with the temperature signal inputted from the temperature sensor based on the predetermined < supply amount information of SCR exhaust gas according to the temperature signal & can do.

본 발명에 따른 SCR 장치는 다음과 같은 효과가 있다. The SCR device according to the present invention has the following effects.

가수분해 챔버 내부의 온도를 우레아 가수분해를 위한 최적 온도로 낮춤에 있어서, SCR 배기가스를 냉각함과 함께 가수분해 챔버 내부의 온도에 따라 가수분해 챔버 내부에 공급되는 SCR 배기가스의 양을 선택적으로 조절함으로써 장치 구성을 최소화함과 함께 가수분해 챔버 내부의 온도를 최적화할 수 있게 된다.
In order to lower the temperature inside the hydrolysis chamber to the optimum temperature for urea hydrolysis, the SCR exhaust gas is cooled and the amount of SCR exhaust gas supplied into the hydrolysis chamber depending on the temperature inside the hydrolysis chamber is selectively Thereby minimizing the device configuration and optimizing the temperature inside the hydrolysis chamber.

도 1은 본 발명의 일 실시예에 따른 SCR 장치의 구성도. 1 is a configuration diagram of an SCR apparatus according to an embodiment of the present invention;

본 발명은 우레아(Urea, CO(NH2)2)를 가수분해하여 암모니아(NH3)를 생성하고 생성된 암모니아를 환원제로 SCR 반응기에 공급함에 있어서, 우레아 가수분해 과정에서 요구되는 냉각용 공기로 열교환기에 의해 냉각된 SCR 배기가스를 이용함으로써 냉각용 공기의 주입을 위한 별도의 장치가 요구되지 않는 기술을 제시한다. The present invention relates to a process for producing ammonia (NH 3 ) by hydrolyzing urea (Urea, CO (NH 2 ) 2 ) and supplying ammonia produced as a reducing agent to an SCR reactor, A technique is proposed in which a separate apparatus for injecting cooling air is not required by using the SCR exhaust gas cooled by the heat exchanger.

이하, 도면을 참조하여 본 발명의 일 실시예에 따른 SCR 장치를 상세히 설명하기로 한다. Hereinafter, an SCR device according to an embodiment of the present invention will be described in detail with reference to the drawings.

도 1을 참조하면, 본 발명의 일 실시예에 따른 SCR 장치는 SCR 반응기(110), 우레아 가수분해장치(130), SCR 배기관(140), 열교환기(150), SCR 배기가스 공급장치(170) 및 제어장치(180)를 포함하여 이루어진다. 1, an SCR apparatus according to an embodiment of the present invention includes a SCR reactor 110, a urea hydrolysis apparatus 130, an SCR exhaust pipe 140, a heat exchanger 150, an SCR exhaust gas supply apparatus 170 And a control device 180. The control device 180 includes a control unit 180,

상기 SCR 반응기(110)는 환원제에 의한 질소산화물의 환원 반응이 진행되는 공간을 제공한다. 상기 SCR 반응기(110)의 일측에 구비된 배기가스 공급관(30)을 통해 상기 SCR 반응기(110)로 엔진 배기가스가 공급되며, 환원제는 환원제 공급관(120)으로부터 배기가스 공급관(30)을 거쳐 SCR 반응기(110)로 공급된다. 즉, 환원제 공급관(120)의 일단에 배기가스 공급관(30)에 연결된 형태이며, 배기가스 공급관(30) 내에서 엔진 배기가스와 환원제가 혼합되어 SCR 반응기(110)로 공급된다. 상기 환원제 공급관(120)을 통해 SCR 반응기(110)로 공급되는 환원제는 우레아의 가수분해에 의해 생성되는 암모니아(NH3)이며, 암모니아(NH3)는 SCR 반응기(110) 내에서 배기가스 내에 포함되어 있는 질소산화물(NOx)과 반응하여 질소산화물(NOx)을 질소(N2)와 수증기로 환원시키는 역할을 한다. 상기 배기가스 공급관(30)을 통해 SCR 반응기(110)로부터 공급되는 엔진 배기가스는 엔진(10)으로부터 직접 배기되는 배기가스 또는 터보차저(turbo charger)(20)를 거쳐 배치되는 배기가스이거나 이들의 혼합 배기가스일 수 있다. The SCR reactor 110 provides a space where the reduction reaction of nitrogen oxides by the reducing agent proceeds. The engine exhaust gas is supplied to the SCR reactor 110 through the exhaust gas supply pipe 30 provided at one side of the SCR reactor 110. The reducing agent is supplied from the reducing agent supply pipe 120 through the exhaust gas supply pipe 30 to the SCR Is supplied to the reactor (110). That is, one end of the reducing agent supply pipe 120 is connected to the exhaust gas supply pipe 30. In the exhaust gas supply pipe 30, the engine exhaust gas and the reducing agent are mixed and supplied to the SCR reactor 110. The reducing agent supplied to the SCR reactor 110 through the reducing agent supply pipe 120 is ammonia (NH 3 ) generated by hydrolysis of urea and ammonia (NH 3 ) is contained in the exhaust gas in the SCR reactor 110 It is reacted with nitrogen oxide (NO x), which serves to reduce nitrogen oxide (NO x) to nitrogen (N 2) and water vapor. The engine exhaust gas supplied from the SCR reactor 110 through the exhaust gas supply pipe 30 is exhaust gas discharged directly from the engine 10 or exhaust gas disposed through the turbocharger 20, Mixed exhaust gas.

상기 우레아 가수분해장치(130)는 우레아(Urea, CO(NH2)2)를 일정 온도 하에서 가수분해하여 암모니아(NH3)를 생성하는 장치로서, 세부적으로 우레아의 가수분해 공간을 제공하는 가수분해 챔버(132)와, 상기 가수분해 챔버(132) 내부의 온도를 우레아 가수분해 온도 이상으로 가열시키는 가열수단을 포함하여 구성된다. 또한, 상기 가수분해 챔버(132) 내부의 일측에는 우레아를 공급하는 우레아 공급노즐(도시하지 않음)이 구비된다. The urea hydrolysis apparatus 130 is an apparatus for generating ammonia (NH 3 ) by hydrolyzing urea (CO (NH 2 ) 2 ) at a predetermined temperature. Specifically, the urea hydrolysis apparatus 130 comprises hydrolysis A chamber 132 and heating means for heating the temperature inside the hydrolysis chamber 132 to a temperature higher than the urea hydrolysis temperature. In addition, a urea supply nozzle (not shown) for supplying urea is provided at one side of the inside of the hydrolysis chamber 132.

상기 가열수단을 통해 가수분해 챔버(132) 내부의 온도를 상승시킴에 있어서, 가수분해 챔버(132) 내부의 온도가 우레아 가수분해를 위한 최적 온도로 가열되도록 가열수단이 동작되는 것이 가장 바람직하지만, 연료량 및 공기량의 제어를 통해 가수분해 챔버(132) 내의 온도가 특정 온도(우레아 가수분해의 최적 온도)로 맞추어지기에는 변수가 많다. 특히, 우레아 가수분해의 최적 온도로 가열되도록 연료량 및 공기량이 제어되더라도 가수분해 챔버(132) 내부의 온도가 우레아 가수분해의 최적 온도보다 낮을 경우 우레아의 가수분해가 이루어지지 않는 문제점이 발생된다. 이에, 가수분해 챔버(132) 내부의 온도가 우레아 가수분해의 최적 온도보다 높도록 가열장치(131)를 동작시키며, 냉각용 공기를 가수분해 챔버(132) 내부에 주입하여 우레아 가수분해의 최적 온도로 낮추는 방법을 택하게 된다. '발명의 배경이 되는 기술'에서 기술한 바와 같이, 종래의 경우 가수분해 챔버(132) 내부의 온도를 우레아 가수분해의 최적 온도로 낮추는 방법으로 가수분해 챔버(132) 일측에 구비된 공기공급라인을 통해 냉각용 공기를 주입하는 방법을 택하고 있다. 참고로, 상기 가열장치(131)는 전기히터 또는 버너 등으로 구성될 수 있다. Most preferably, the heating means is operated such that the temperature inside the hydrolysis chamber 132 is heated to the optimum temperature for urea hydrolysis in raising the temperature inside the hydrolysis chamber 132 through the heating means, There are many variables to control the temperature in the hydrolysis chamber 132 to a specific temperature (optimum temperature of urea hydrolysis) through control of fuel amount and air amount. Particularly, even if the amount of fuel and the amount of air are controlled so as to be heated to the optimum temperature of urea hydrolysis, when the temperature inside the hydrolysis chamber 132 is lower than the optimum temperature of urea hydrolysis, there arises a problem that urea hydrolysis is not performed. The heating apparatus 131 is operated so that the temperature inside the hydrolysis chamber 132 is higher than the optimum temperature for urea hydrolysis and the cooling air is injected into the hydrolysis chamber 132 to obtain the optimum temperature for urea hydrolysis . As described in the Background of the Invention, in the conventional case, the temperature of the interior of the hydrolysis chamber 132 is lowered to the optimum temperature for urea hydrolysis, And the cooling air is injected through the cooling fan. For reference, the heating device 131 may include an electric heater, a burner, or the like.

본 발명은 가수분해 챔버(132) 내부의 온도를 우레아 가수분해의 최적 온도로 낮추는 방법으로 SCR 배기가스를 냉각시키고 냉각된 SCR 배기가스를 가수분해 챔버(132) 내부에 주입시키는 기술을 제시한다. 이를 위해, SCR 배기관(140)의 일단이 가수분해 챔버(132) 내부로 연결되며, SCR 배기관(140)의 일 구간에 열교환기(150)가 구비된다. SCR 반응기(110)로부터 SCR 배기관(140)을 통해 배출되는 SCR 배기가스는 열교환기(150)를 통해 냉각되며, 열교환기(150)에 의해 냉각된 SCR 배기가스는 냉각용 공기의 용도로 가수분해 챔버(132)로 공급된다. 상기 열교환기(150)는 일 실시예로, 순환수 공급라인(도시하지 않음)과 SCR 배기관(140)이 교차되도록 하여, SCR 배기관(140) 내의 SCR 배기가스의 열이 순환수 공급라인에 전달되어 순환수가 가열되는 형태로 구성할 수 있다. The present invention provides a technique for cooling the SCR exhaust gas and for injecting the cooled SCR exhaust gas into the hydrolysis chamber 132 by lowering the temperature inside the hydrolysis chamber 132 to the optimum temperature of urea hydrolysis. To this end, one end of the SCR exhaust pipe 140 is connected to the inside of the hydrolysis chamber 132, and a heat exchanger 150 is provided in one section of the SCR exhaust pipe 140. The SCR exhaust gas discharged from the SCR reactor 110 through the SCR exhaust pipe 140 is cooled through the heat exchanger 150 and the SCR exhaust gas cooled by the heat exchanger 150 is subjected to hydrolysis And is supplied to the chamber 132. The heat exchanger 150 is an embodiment in which the circulation water supply line (not shown) and the SCR exhaust pipe 140 are intersected with each other so that the heat of the SCR exhaust gas in the SCR exhaust pipe 140 is transmitted to the circulation water supply line So that the circulation water is heated.

가수분해 챔버(132) 내부의 온도를 우레아 가수분해의 최적 온도로 정확히 낮추기 위해 온도센서(160), SCR 배기가스 공급장치(170) 및 제어장치(180)가 더 구비된다. 상기 온도센서(160)는 가수분해 챔버(132) 내부에 구비되어 가수분해 챔버(132) 내부의 온도를 측정하는 역할을 하며, 상기 SCR 배기가스 공급장치(170)는 가수분해 챔버(132)로 공급되는 SCR 배기가스(열교환기(150)에 의해 냉각된)의 양을 조절하는 역할을 한다. 또한, 상기 제어장치(180)는 상기 온도센서(160)에 의해 센싱된 온도 신호를 바탕으로 SCR 배기가스 공급장치(170)를 통해 가수분해 챔버(132)로 공급되는 SCR 배기가스(열교환기(150)에 의해 냉각된)의 양을 제어한다. 이 때, 센싱되는 온도 신호에 따른 가수분해 챔버(132)에 공급되는 SCR 배기가스의 양은 미리 설정되어 상기 제어장치(180)에 저장되는 것이 바람직하다. 즉, 상기 제어장치(180)는 미리 설정된 <온도 신호에 따른 SCR 배기가스의 공급량 정보>를 바탕으로 상기 온도센서(160)로부터 입력되는 온도 신호에 대응하여 특정량의 SCR 배기가스가 상기 가수분해 챔버(132)에 공급되도록 제어할 수 있다.
The temperature sensor 160, the SCR exhaust gas supply device 170 and the control device 180 are further provided to accurately lower the temperature inside the hydrolysis chamber 132 to the optimum temperature of urea hydrolysis. The temperature sensor 160 is provided inside the hydrolysis chamber 132 to measure the temperature inside the hydrolysis chamber 132. The SCR exhaust gas supply device 170 is connected to the hydrolysis chamber 132 And serves to regulate the amount of SCR exhaust gas (cooled by the heat exchanger 150) supplied. The controller 180 controls the temperature of the SCR exhaust gas (heat exchanger) supplied to the hydrolysis chamber 132 through the SCR exhaust gas supply device 170 based on the temperature signal sensed by the temperature sensor 160 150). &Lt; / RTI > At this time, the amount of the SCR exhaust gas supplied to the hydrolysis chamber 132 according to the sensed temperature signal is preferably preset and stored in the controller 180. That is, the control device 180 determines, based on the predetermined &lt; supply amount information of the SCR exhaust gas according to the temperature signal &gt;, a specific amount of SCR exhaust gas corresponding to the temperature signal input from the temperature sensor 160, To be supplied to the chamber (132).

10 : 엔진 20 : 터보차저
30 : 배기가스 공급관 110 : SCR 반응기
120 : 환원제 공급관 130 : 우레아 가수분해장치
131 : 가열장치 132 : 가수분해 챔버
140 : SCR 배기관 150 : 열교환기
160 : 온도센서 170 : SCR 배기가스 공급장치
180 : 제어장치10: Engine 20: Turbocharger
30: exhaust gas supply pipe 110: SCR reactor
120: Reducing agent supply pipe 130: Urea hydrolysis device
131: Heating device 132: Hydrolysis chamber
140: SCR exhaust pipe 150: Heat exchanger
160: Temperature sensor 170: SCR exhaust gas supply device
180: Control device

Claims (3)

환원제에 의한 질소산화물의 환원 반응이 진행되는 공간을 제공하는 SCR 반응기;
가열수단과 가수분해 챔버를 포함하여 구성되어, 우레아를 가수분해하여 환원제를 생성하는 우레아 가수분해장치;
상기 가수분해 챔버의 내측에 연결되어, SCR 반응기로부터 배출되는 SCR 배기가스를 가수분해 챔버 내부에 주입하는 SCR 배기관; 및
상기 SCR 배기관의 일 구간에 구비되어, SCR 배기가스를 냉각시키는 열교환기를 포함하여 이루어지는 것을 특징으로 하는 SCR 장치.
An SCR reactor for providing a space in which the reduction reaction of nitrogen oxide by the reducing agent proceeds;
A urea hydrolyzing device, comprising a heating means and a hydrolysis chamber, for hydrolyzing urea to produce a reducing agent;
An SCR exhaust pipe connected to the inside of the hydrolysis chamber and injecting the SCR exhaust gas discharged from the SCR reactor into the hydrolysis chamber; And
And a heat exchanger provided in one section of the SCR exhaust pipe for cooling the SCR exhaust gas.
제 1 항에 있어서, 온도센서, SCR 배기가스 공급장치 및 제어장치가 더 구비되며,
상기 온도센서는 가수분해 챔버 내부에 구비되어 가수분해 챔버 내부의 온도를 측정하며,
상기 SCR 배기가스 공급장치는 가수분해 챔버로 공급되는 SCR 배기가스(열교환기에 의해 냉각된)의 양을 조절하며,
상기 제어장치는 상기 온도센서에 의해 센싱된 온도 신호를 바탕으로 SCR 배기가스 공급장치를 통해 가수분해 챔버로 공급되는 SCR 배기가스(열교환기에 의해 냉각된)의 양을 제어하는 것을 특징으로 하는 SCR 장치.
The exhaust gas purification apparatus according to claim 1, further comprising a temperature sensor, an SCR exhaust gas supply device, and a control device,
The temperature sensor is provided inside the hydrolysis chamber to measure the temperature inside the hydrolysis chamber,
The SCR exhaust gas supply regulates the amount of SCR exhaust gas (cooled by the heat exchanger) supplied to the hydrolysis chamber,
Wherein the control device controls the amount of SCR exhaust gas (cooled by the heat exchanger) supplied to the hydrolysis chamber through the SCR exhaust gas supply device based on the temperature signal sensed by the temperature sensor .
제 2 항에 있어서, 상기 제어장치는 미리 설정된 <온도 신호에 따른 SCR 배기가스의 공급량 정보>를 바탕으로 상기 온도센서로부터 입력되는 온도 신호에 대응하여 특정량의 냉각된 SCR 배기가스가 상기 가수분해 챔버 내부에 공급되도록 제어하는 것을 특징으로 하는 SCR 장치. 3. The exhaust gas purification apparatus according to claim 2, wherein the controller controls, based on a predetermined < supply amount information of SCR exhaust gas according to a temperature signal >, a specific amount of cooled SCR exhaust gas corresponding to a temperature signal input from the temperature sensor So as to be supplied into the chamber.
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Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102182935B1 (en) * 2015-03-13 2020-11-25 현대중공업 주식회사 Low Pressure Selective Catalytic Reduction System
KR101867367B1 (en) * 2016-11-03 2018-06-15 한국기계연구원 The SCR system of a ship for urea spray atomization
KR101884439B1 (en) * 2016-12-05 2018-08-01 주식회사 하이젠 A device for removing harmful gas and particulate matter
KR101864749B1 (en) * 2016-12-27 2018-06-08 주식회사 파나시아 Exhaust Gas Denitrifying System of Ship
KR101957450B1 (en) * 2017-04-27 2019-03-13 한국기계연구원 System and method for the processing of exhaust gas by using multi-step exhaust gas circulation
EP3406868A1 (en) * 2017-05-24 2018-11-28 Yara Marine Technologies AS Conditioning of the exhaust gas plume of a marine vessel
KR102089126B1 (en) 2017-05-24 2020-03-13 주식회사 엘지화학 Selected Catalytic Reduction System
DE102017112731A1 (en) * 2017-06-09 2018-12-13 Man Diesel & Turbo Se Method and control unit for operating an SCR exhaust aftertreatment system of an internal combustion engine
KR102367278B1 (en) * 2017-08-31 2022-02-24 에이치에스디엔진 주식회사 Selective catalytic reduction system
FR3071871B1 (en) 2017-09-29 2020-02-07 Continental Automotive France SELECTIVE CATALYTIC REDUCTION PROCESS WITH AMMONIA DESORPTION FROM A CARTRIDGE IN AN EXHAUST LINE
CN107806359B (en) * 2017-11-24 2024-03-29 江苏科技大学 Power release device of ship denitration system based on SCR
CN108131189B (en) * 2018-01-31 2019-06-04 安徽江淮汽车集团股份有限公司 After-treatment technics test macro
KR102068334B1 (en) * 2018-11-01 2020-01-20 한국기계연구원 System for processing NOx by using pyrolysis of reducing agent
KR20200055524A (en) 2018-11-13 2020-05-21 현대자동차주식회사 Urea mixing device of SCR system
KR102527190B1 (en) * 2018-11-20 2023-05-02 에이치에스디엔진 주식회사 Gas heating system
JP7211834B2 (en) * 2019-02-01 2023-01-24 三菱重工業株式会社 REDUCING AGENT SUPPLY DEVICE AND METHOD OF OPERATION OF REDUCING AGENT SUPPLY DEVICE
CN110080863B (en) * 2019-03-29 2021-04-20 哈尔滨工程大学 Heating system for improving low-temperature performance of low-pressure SCR system of marine diesel engine
FR3102684B1 (en) * 2019-10-31 2021-11-12 Faurecia Systemes Dechappement Exhaust gas purification device, exhaust line and associated vehicle
DE102020113041A1 (en) * 2020-05-14 2021-11-18 Man Energy Solutions Se Exhaust turbine and method of operating the same
KR102464835B1 (en) * 2020-10-13 2022-11-10 한국기계연구원 Apparatus and method for spraying urea by using thermal energy of incinerator
KR20220161776A (en) * 2021-05-31 2022-12-07 한국에너지기술연구원 Scr system and mixer for thereof
CN113931723A (en) * 2021-10-12 2022-01-14 河北工业大学 Device and method for reducing urea crystallization of SCR system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0141726B1 (en) 1995-01-09 1998-07-01 구자홍 Hermetic Rotary Compressor
KR20120030553A (en) 2010-01-15 2012-03-28 미츠비시 쥬고교 가부시키가이샤 Exhaust-gas denitration system, ship equipped therewith, and method for controlling exhaust-gas denitration system

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3751962B2 (en) * 2003-09-05 2006-03-08 日産ディーゼル工業株式会社 Engine exhaust purification system
US7275366B2 (en) 2004-09-14 2007-10-02 Advanced Cleanup Technologies, Inc. High thermal efficiency Selective Catalytic Reduction (SCR) system
JP4646934B2 (en) * 2007-03-01 2011-03-09 株式会社日立ハイテクノロジーズ Engine exhaust treatment apparatus and engine exhaust treatment method using the same
US8171724B2 (en) * 2007-05-02 2012-05-08 Ford Global Technologies, Llc Vehicle-based strategy for removing urea deposits from an SCR catalyst
EP2065578A1 (en) * 2007-11-28 2009-06-03 International Engine Intellectual Property Heating system for chemical used in exhaust purification system
JP2009209840A (en) * 2008-03-05 2009-09-17 Nissan Motor Co Ltd Exhaust emission control device for engine
DE102008033984B4 (en) * 2008-07-21 2016-03-24 Friedrich Boysen Gmbh & Co. Kg exhaust system
JP2010190049A (en) * 2009-02-16 2010-09-02 Toyota Motor Corp Control device for internal combustion engine with superchargers
KR20100132310A (en) 2009-06-09 2010-12-17 현대중공업 주식회사 The scr system of a ship for nitrogen oxide(nox) reduction using fine urea powder
KR101367114B1 (en) 2009-12-08 2014-02-26 대우조선해양 주식회사 De-NOx system for treating exhaust gas
JP2013002355A (en) 2011-06-16 2013-01-07 Ihi Corp Denitration device
KR101300706B1 (en) 2011-07-27 2013-08-26 대우조선해양 주식회사 Exhaust gas cleaning apparatus and method in ship or marine structure
JP2013139733A (en) 2011-12-28 2013-07-18 Mitsubishi Heavy Ind Ltd Method of controlling internal combustion engine with denitration catalyst, internal combustion engine with denitration catalyst, and ship with the same
KR101366937B1 (en) * 2012-06-25 2014-02-25 두산엔진주식회사 Power plant for ship with selective catalytic reuction system and auxiliary power generation system
KR101417296B1 (en) 2012-06-25 2014-07-08 두산엔진주식회사 Power plant for ship with selective catalytic reuction system for internal combustion engine
KR101367024B1 (en) * 2012-06-28 2014-02-24 두산엔진주식회사 Urea hydrolysis apparatus using fuel cell and selective catalytic reuction system with the same
KR101818262B1 (en) 2012-09-27 2018-02-21 현대중공업 주식회사 SCR catalytic cleaning system using the exhaust gas
KR20140046651A (en) 2012-10-09 2014-04-21 현대중공업 주식회사 Urea injection device for scr reactor of large-size marine diesel engine and it's control method
KR101273551B1 (en) 2013-01-02 2013-06-17 삼건세기(주) The purifying system of exhaust gas
KR101277518B1 (en) * 2013-04-09 2013-06-21 포항공과대학교 산학협력단 Scr/sncr combined de-nox system for reducing yellow plume and nox
KR101402375B1 (en) 2013-04-24 2014-06-03 현대중공업 주식회사 Urea supply device in selective catalytic reduction system and working method thereof
KR101445038B1 (en) 2013-06-28 2014-09-26 두산엔진주식회사 System for selective catalytic reuction and catalytic regeneration
KR101461337B1 (en) * 2013-09-09 2014-11-13 두산엔진주식회사 Selective catalytic reduction system
KR101497828B1 (en) 2013-09-30 2015-03-02 두산엔진주식회사 System for selective catalytic reuction and method for selective catalytic reuction
KR101497831B1 (en) * 2013-10-07 2015-03-02 두산엔진주식회사 Power plant with selective catalytic reuction system
KR101496043B1 (en) * 2013-10-31 2015-02-25 현대중공업 주식회사 SCR System for Diesel Engine
KR102182935B1 (en) * 2015-03-13 2020-11-25 현대중공업 주식회사 Low Pressure Selective Catalytic Reduction System

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0141726B1 (en) 1995-01-09 1998-07-01 구자홍 Hermetic Rotary Compressor
KR20120030553A (en) 2010-01-15 2012-03-28 미츠비시 쥬고교 가부시키가이샤 Exhaust-gas denitration system, ship equipped therewith, and method for controlling exhaust-gas denitration system

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