KR102219051B1 - Reducing agent supply device for SCR system - Google Patents

Reducing agent supply device for SCR system Download PDF

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KR102219051B1
KR102219051B1 KR1020160115454A KR20160115454A KR102219051B1 KR 102219051 B1 KR102219051 B1 KR 102219051B1 KR 1020160115454 A KR1020160115454 A KR 1020160115454A KR 20160115454 A KR20160115454 A KR 20160115454A KR 102219051 B1 KR102219051 B1 KR 102219051B1
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based material
hydrocarbon
hydrogen
reducing agent
scr
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KR20180028151A (en
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성삼경
김현수
정몽규
이상억
김도윤
유화영
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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]
    • 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
    • F01N3/18—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
    • 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
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • 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

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

Abstract

본 발명은 탄화수소계 물질과 수소(H2)를 질소산화물(NOx)과 반응시켜 질소산화물(NOx)을 질소(N2)로 환원시킴으로써 환원제 공급에 요구되는 장치적 구성을 간략화할 수 있는 SCR 시스템의 환원제 공급장치에 관한 것으로서, 본 발명에 따른 SCR 시스템의 환원제 공급장치는 SCR 장치에 탄화수소계 물질을 공급하여 탄화수소계 물질에 의한 질소산화물의 환원을 유도하는 탄화수소계 물질 공급장치; 및 탄화수소계 물질로부터 수소를 생생함과 함께 생성된 수소를 SCR 장치에 공급하여 질소산화물의 환원을 유도하는 수소생성장치를 포함하여 이루어지는 것을 특징으로 한다. The present invention can simplify the device configuration required for supply of a reducing agent by reacting a hydrocarbon-based material and hydrogen (H 2 ) with nitrogen oxide (NO x ) to reduce nitrogen oxide (NO x ) to nitrogen (N 2 ). A reducing agent supplying device for an SCR system, comprising: a hydrocarbon-based material supplying device for supplying a hydrocarbon-based material to the SCR device to induce reduction of nitrogen oxides by the hydrocarbon-based material; And a hydrogen generation device for generating hydrogen from a hydrocarbon-based material and supplying the generated hydrogen to the SCR device to induce reduction of nitrogen oxides.

Figure R1020160115454
Figure R1020160115454

Description

SCR 시스템의 환원제 공급장치{Reducing agent supply device for SCR system}Reducing agent supply device for SCR system

본 발명은 SCR 시스템의 환원제 공급장치에 관한 것으로서, 보다 상세하게는 탄화수소계 물질과 수소(H2)를 질소산화물(NOx)과 반응시켜 질소산화물(NOx)을 질소(N2)로 환원시킴으로써 환원제 공급에 요구되는 장치적 구성을 간략화할 수 있는 SCR 시스템의 환원제 공급장치에 관한 것이다. The present invention relates to a reducing agent supply device of an SCR system, and more particularly, by reacting a hydrocarbon-based material and hydrogen (H 2 ) with nitrogen oxide (NO x ) to reduce nitrogen oxide (NO x ) to nitrogen (N 2 ) It relates to a reducing agent supply device of the SCR system that can simplify the device configuration required for supplying the reducing agent.

선박의 배기가스에 포함되어 있는 질소산화물(NOx) 및 황산화물은 국제해사기구(IMO, International Maritime Organization)에 의해 배출규제를 받고 있는 대표적인 대기오염물질이다. 질소산화물을 제거하기 위해 선박에는 통상, 선택적촉매환원 장치(selective catalytic reduction system)(이하, SCR 장치라 함)가 구비된다(한국공개특허 제2012-30553호 참조). Nitrogen oxides (NO x ) and sulfur oxides contained in ship's exhaust gases are representative air pollutants that are subject to emission regulations by the International Maritime Organization (IMO). In order to remove nitrogen oxides, ships are usually equipped with a selective catalytic reduction system (hereinafter referred to as an SCR device) (refer to Korean Patent Publication No. 2012-30553).

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 oxides by the SCR device 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) It is reacted with nitrogen oxide (NO x) in exhaust gas of nitrogen oxides (NO x) are reduced to nitrogen (N 2) and water vapor.

엔진의 터보챠저(T/C) 후단에서 대략 280℃ 이하의 저온으로 운전되는 SCR의 경우, 질소산화물(NOx)의 환원 반응에 이용되는 암모니아(NH3)은 환원제 공급장치에 의해 생성되어 SCR 장치로 공급되며, 환원제 공급장치는 우레아(Urea, CO(NH2)2)를 암모니아(NH3)로 가수분해시키는 우레아 가수분해장치를 필수적으로 구비한다. In the case of SCR operated at a low temperature of about 280°C or less at the rear end of the turbocharger (T/C) of the engine, ammonia (NH 3 ) used in the reduction reaction of nitrogen oxides (NO x ) is generated by the reducing agent supply device and It is supplied to the device, and the reducing agent supply device essentially includes a urea hydrolysis device that hydrolyzes urea (Urea, CO(NH 2 ) 2 ) into ammonia (NH 3 ).

이와 같이 종래의 SCR 장치는 배기가스에 포함되어 있는 질소산화물(NOx)를 암모니아(NH3) 환원제를 이용하여 질소(N2)로 환원시키는 방식이며, 질소산화물(NOx) 환원에 사용되는 암모니아(NH3)는 우레아 가수분해장치에 의해 생성되어 공급받는다. As described above, the conventional SCR device is a method of reducing nitrogen oxides (NO x ) contained in exhaust gas to nitrogen (N 2 ) using ammonia (NH 3 ) reducing agent, and is used for reducing nitrogen oxides (NO x ). Ammonia (NH 3 ) is produced and supplied by a urea hydrolysis device.

우레아를 암모니아로 가수분해하여 SCR 장치에 공급하는 방식임에 따라, 우레아 가수분해장치, 우레아 저장탱크, 우레아 기화장치(vaporizer) 등이 요구되어 장치적 구성이 복잡해지는 문제점이 있다. As urea is hydrolyzed into ammonia and supplied to the SCR device, a urea hydrolysis device, a urea storage tank, a urea vaporizer, etc. are required, resulting in a problem in that the device configuration is complicated.

한국공개특허 제2012-30553호Korean Patent Publication No. 2012-30553

본 발명은 상기와 같은 문제점을 해결하기 위해 안출한 것으로서, 탄화수소계 물질과 수소(H2)를 질소산화물(NOx)과 반응시켜 질소산화물(NOx)을 질소(N2)로 환원시킴으로써 환원제 공급에 요구되는 장치적 구성을 간략화할 수 있는 SCR 시스템의 환원제 공급장치를 제공하는데 그 목적이 있다. The present invention was conceived to solve the above problems, by reacting a hydrocarbon-based material and hydrogen (H 2 ) with nitrogen oxide (NO x ) to reduce the nitrogen oxide (NO x ) to nitrogen (N 2 ) It is an object of the present invention to provide a reducing agent supply device of an SCR system that can simplify the device configuration required for supply.

상기의 목적을 달성하기 위한 본 발명에 따른 SCR 시스템의 환원제 공급장치는 SCR 장치에 탄화수소계 물질을 공급하여 탄화수소계 물질에 의한 질소산화물의 환원을 유도하는 탄화수소계 물질 공급장치; 및 탄화수소계 물질로부터 수소를 생생함과 함께 생성된 수소를 SCR 장치에 공급하여 질소산화물의 환원을 유도하는 수소생성장치를 포함하여 이루어지는 것을 특징으로 한다. The reducing agent supply device of the SCR system according to the present invention for achieving the above object comprises: a hydrocarbon-based material supply device for inducing reduction of nitrogen oxides by the hydrocarbon-based material by supplying a hydrocarbon-based material to the SCR device; And a hydrogen generation device for generating hydrogen from a hydrocarbon-based material and supplying the generated hydrogen to the SCR device to induce reduction of nitrogen oxides.

SCR 장치에 탄화수소계 물질이 단독으로 공급되거나 SCR 장치에 탄화수소계 물질과 수소가 함께 공급될 수 있다. A hydrocarbon-based material may be supplied to the SCR device alone, or a hydrocarbon-based material and hydrogen may be supplied to the SCR device together.

상기 탄화수소계 물질은 기상의 탄화수소계 물질 또는 액상의 탄화수소계 물질이다. 상기 기상의 탄화수소계 물질은 메탄(CH4), 에탄(C2H6), 프로판(C3H8), 부탄(C4H10), 다이메틸에터(C2H6O) 중 어느 하나 또는 이들의 혼합물이거나 액화석유가스(LPG) 또는 액화천연가스(LNG)이고, 상기 액상의 탄화수소계 물질은 메탄올(CH3OH), 에탄올(C2H5OH), 프로판올(C3H7OH), 부탄올(C4H9OH), 바이오디젤, 바이오에탄올 중 어느 하나 또는 이들의 혼합물이다. 또한, 상기 탄화수소계 물질은 선박의 연료원 또는 수송을 위해 적재된 탄화수소계 물질이다. The hydrocarbon-based material is a gaseous hydrocarbon-based material or a liquid hydrocarbon-based material. The gaseous hydrocarbon-based material is any of methane (CH 4 ), ethane (C 2 H 6 ), propane (C 3 H 8 ), butane (C 4 H 10 ), dimethyl ether (C 2 H 6 O) One or a mixture thereof, or liquefied petroleum gas (LPG) or liquefied natural gas (LNG), and the liquid hydrocarbon-based material is methanol (CH 3 OH), ethanol (C 2 H 5 OH), propanol (C 3 H 7 OH), butanol (C 4 H 9 OH), biodiesel, bioethanol, or a mixture thereof. In addition, the hydrocarbon-based material is a fuel source of a ship or a hydrocarbon-based material loaded for transportation.

액상의 탄화수소계 물질을 기화시켜 SCR 장치에 공급하는 기화장치가 더 구비될 수 있다. 또한, 상기 수소생성장치는 탄화수소계 물질과 물(H2O)의 반응을 통해 수소(H2)를 생성시킬 수 있다. A vaporization device for vaporizing a liquid hydrocarbon-based material and supplying it to the SCR device may be further provided. In addition, the hydrogen generator may generate hydrogen (H 2 ) through a reaction of a hydrocarbon-based material and water (H 2 O).

본 발명에 따른 SCR 시스템의 환원제 공급장치는 다음과 같은 효과가 있다. The reducing agent supply device of the SCR system according to the present invention has the following effects.

탄화수소계 물질 또는 탄화수소계 물질과 수소의 혼합물이 질소산화물의 환원제로 공급되는 방식임에 따라, 우레아 공급방식에 요구되는 제반 장치를 생략할 수 있어 환원제 공급장치의 장치 구성을 간략화할 수 있다. As a hydrocarbon-based material or a mixture of a hydrocarbon-based material and hydrogen is supplied as a reducing agent for nitrogen oxides, various devices required for the urea supply method can be omitted, thereby simplifying the device configuration of the reducing agent supplying device.

도 1은 본 발명의 일 실시예에 따른 SCR 시스템의 환원제 공급장치의 구성도. 1 is a block diagram of a reducing agent supply device of an SCR system according to an embodiment of the present invention.

본 발명은 탄화수소계 물질 또는 탄화수소계 물질과 수소(H2)의 혼합물을 환원제로 이용하여 배기가스에 포함되어 있는 질소산화물(NOx)를 환원시키는 기술을 제시한다. The present invention proposes a technique for reducing nitrogen oxides (NO x ) contained in exhaust gas by using a hydrocarbon-based material or a mixture of a hydrocarbon-based material and hydrogen (H 2 ) as a reducing agent.

본 발명에 있어서, 탄화수소계 물질은 탄소(C)와 수소(H)로 이루어진 기상의 탄화수소계 물질 그리고 탄소(C), 수소(H) 및 산소(O)로 이루어진 액상의 탄화수소계 물질을 포함하는 의미이다. 또한, 본 발명의 탄화수소계 물질은 선박의 연료원으로 사용 가능한 물질로 한정할 수 있다. 이와 같은 탄화수소계 물질은 선박의 연료저장장치에 저장되어 있거나 선박 내에 수송물 상태로 구비될 수 있다. In the present invention, the hydrocarbon-based material includes a gaseous hydrocarbon-based material consisting of carbon (C) and hydrogen (H) and a liquid hydrocarbon-based material consisting of carbon (C), hydrogen (H) and oxygen (O). Meaning. In addition, the hydrocarbon-based material of the present invention may be limited to a material that can be used as a fuel source for a ship. Such a hydrocarbon-based material may be stored in a fuel storage device of a ship or may be provided in a transport state in a ship.

기상의 탄화수소계 물질은 메탄(CH4), 에탄(C2H6), 프로판(C3H8), 부탄(C4H10), 다이메틸에터(C2H6O) 중 어느 하나 또는 이들의 혼합물이거나 액화석유가스(LPG) 또는 액화천연가스(LNG)이다. 또한, 상기 액상의 탄화수소계 물질은 메탄올(CH3OH), 에탄올(C2H5OH), 프로판올(C3H7OH), 부탄올(C4H9OH), 바이오디젤, 바이오에탄올 중 어느 하나 또는 이들의 혼합물이다. Gas-phase hydrocarbon-based material is any one of methane (CH 4 ), ethane (C 2 H 6 ), propane (C 3 H 8 ), butane (C 4 H 10 ), and dimethyl ether (C 2 H 6 O) Or a mixture thereof, or liquefied petroleum gas (LPG) or liquefied natural gas (LNG). In addition, the liquid hydrocarbon-based material is methanol (CH 3 OH), ethanol (C 2 H 5 OH), propanol (C 3 H 7 OH), butanol (C 4 H 9 OH), biodiesel, bioethanol One or a mixture thereof.

탄화수소계 물질 또는 탄화수소계 물질과 수소(H2)의 혼합물은 SCR 장치에 투입되어 질소산화물(NOx)과 반응하여 질소산화물(NOx)을 질소(N2)로 환원시키는 역할을 한다. SCR 장치에 투입되는 탄화수소계 물질은 기체 상태로 공급되며, 탄화수소계 물질이 액상인 경우 기화되어 SCR 장치에 공급된다. Mixtures of hydrocarbon-based material or a hydrocarbon-based material and the hydrogen (H 2) is added to the SCR device serves to reduce nitrogen oxide (NO x) reacts with the nitrogen oxides (NO x) to nitrogen (N 2). The hydrocarbon-based material input to the SCR device is supplied in a gaseous state, and when the hydrocarbon-based material is liquid, it is vaporized and supplied to the SCR device.

SCR 장치에 탄화수소계 물질과 함께 공급되는 수소(H2)는 탄화수소계 물질의 화학반응에 의해 생성되며, 수소(H2) 또한 질소산화물(NOx)과 반응하여 질소(N2)로 환원시키는 역할을 한다. Hydrogen (H 2 ) supplied with hydrocarbon-based materials to the SCR device is generated by a chemical reaction of hydrocarbon-based materials, and hydrogen (H 2 ) also reacts with nitrogen oxides (NO x ) to reduce it to nitrogen (N 2 ). Plays a role.

이하, 도면을 참조하여 본 발명의 일 실시예에 따른 SCR 시스템의 환원제 공급장치를 상세히 설명하기로 한다. Hereinafter, an apparatus for supplying a reducing agent of an SCR system 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 시스템의 환원제 공급장치는 탄화수소계 물질 공급장치(110), 수소생성장치(120) 및 기화장치(130)를 포함하여 이루어진다. Referring to FIG. 1, a reducing agent supplying device of an SCR system according to an embodiment of the present invention includes a hydrocarbon-based material supplying device 110, a hydrogen generating device 120, and a vaporizing device 130.

상기 탄화수소계 물질 공급장치(110)는 SCR 장치(140)에 탄화수소계 물질을 공급하는 역할을 하며, SCR 장치(140)에 공급되는 탄화수소계 물질은 질소산화물(NOx)를 질소(N2)로 환원시키는 역할을 한다. The hydrocarbon-based material supply device 110 serves to supply a hydrocarbon-based material to the SCR device 140, and the hydrocarbon-based material supplied to the SCR device 140 converts nitrogen oxide (NO x ) into nitrogen (N 2 ). It serves to reduce to.

상기 탄화수소계 물질은 선박의 연료원으로 사용 가능한 탄화수소계 물질로서 탄소(C)와 수소(H)로 이루어진 기상의 탄화수소계 물질 그리고 탄소(C), 수소(H) 및 산소(O)로 이루어진 액상의 탄화수소계 물질을 포함하는 의미이다. 또한, 상기 기상의 탄화수소계 물질은 메탄(CH4), 에탄(C2H6), 프로판(C3H8), 부탄(C4H10), 다이메틸에터(C2H6O) 중 어느 하나 또는 이들의 혼합물이거나 액화석유가스(LPG) 또는 액화천연가스(LNG)이다. 또한, 상기 액상의 탄화수소계 물질은 메탄올(CH3OH), 에탄올(C2H5OH), 프로판올(C3H7OH), 부탄올(C4H9OH), 바이오디젤, 바이오에탄올 중 어느 하나 또는 이들의 혼합물이다. 이와 함께, 상기 탄화수소계 물질은 선박의 연료저장장치로부터 공급받거나 수송을 위해 적재된 탄화수소계 물질 저장장치로부터 공급받을 수 있다. The hydrocarbon-based material is a hydrocarbon-based material that can be used as a fuel source for ships, and is a gaseous hydrocarbon-based material consisting of carbon (C) and hydrogen (H), and a liquid phase consisting of carbon (C), hydrogen (H) and oxygen (O). It is meant to include a hydrocarbon-based material of. In addition, the gaseous hydrocarbon-based material is methane (CH 4 ), ethane (C 2 H 6 ), propane (C 3 H 8 ), butane (C 4 H 10 ), dimethyl ether (C 2 H 6 O) Any one or a mixture thereof, or liquefied petroleum gas (LPG) or liquefied natural gas (LNG). In addition, the liquid hydrocarbon-based material is methanol (CH 3 OH), ethanol (C 2 H 5 OH), propanol (C 3 H 7 OH), butanol (C 4 H 9 OH), biodiesel, bioethanol One or a mixture thereof. In addition, the hydrocarbon-based material may be supplied from a fuel storage device of a ship or a hydrocarbon-based material storage device loaded for transportation.

한편, 액상의 탄화수소계 물질을 직접 SCR 장치에 주입시 기화열에 의해 배가스의 온도가 떨어지게 되고, 기화되지 않은 액상의 탄화수소가 SCR 촉매 표면 혹은 기공에 흡착되어 촉매독으로 작용할 수 있다. 이는 우레아를 사용하는 기존 방식과 동일한 문제점을 야기하며, 온도가 280℃ 이하보다 더 낮아지면 환원반응 효율에 불리하다. 이에, 액상의 탄화수소계 물질의 경우 기화시켜 SCR 장치(140)로 공급되는 것이 바람직하며, 상기 기화장치(130)는 액상의 탄화수소계 물질을 일정 온도 이상으로 가열하여 기화시킴과 함께 액상의 탄화수소계 물질로부터 기화된 기상의 탄화수소계 물질을 SCR 장치(140)로 공급하는 역할을 한다. Meanwhile, when a liquid hydrocarbon-based material is directly injected into the SCR device, the temperature of the exhaust gas decreases due to the heat of vaporization, and the liquid hydrocarbon that is not vaporized may be adsorbed on the surface or pores of the SCR catalyst to act as a catalyst poison. This causes the same problem as the conventional method using urea, and when the temperature is lower than 280°C, the reduction reaction efficiency is disadvantageous. Thus, in the case of a liquid hydrocarbon-based material, it is preferable to vaporize and supply it to the SCR device 140, and the vaporization device 130 heats the liquid hydrocarbon-based material to a certain temperature or higher to evaporate it and vaporizes the liquid hydrocarbon-based material. It serves to supply a gaseous hydrocarbon-based material vaporized from the material to the SCR device 140.

상기 수소생성장치(120)는 기상의 탄화수소계 물질 또는 액상의 탄화수소계 물질로부터 수소(H2)를 생성하여 SCR 장치(140)로 공급하는 역할을 한다. 상기 수소생성장치(120)로부터 생성되어 SCR 장치(140)로 공급되는 수소(H2)는 탄화수소계 물질과 함께 질소산화물(NOx)를 질소(N2)로 환원시키는 역할을 한다. 탄화수소계 물질과 수소(H2)에 의한 질소산화물(NOx)의 환원 효율은 탄화수소계 물질의 단독 공급에 비해 증대되고, 증대된 성능만큼 SCR 촉매량을 줄일 수 있으며 결과적으로 SCR 장치를 작게 구성할 수 있으나, 탄화수소계 물질의 화학 반응을 유도하여 수소(H2)를 생성함에 따라, SCR 장치(140)에 공급되는 수소(H2)의 혼합비율이 높아질수록 처리비용이 증가되는 면을 고려해야 한다. The hydrogen generation device 120 serves to generate hydrogen (H 2 ) from a gaseous hydrocarbon-based material or a liquid hydrocarbon-based material and supply it to the SCR device 140. Hydrogen (H 2 ) generated from the hydrogen generating device 120 and supplied to the SCR device 140 serves to reduce nitrogen oxides (NO x ) to nitrogen (N 2 ) together with a hydrocarbon-based material. The reduction efficiency of nitrogen oxides (NO x ) by hydrocarbon-based materials and hydrogen (H 2 ) is increased compared to the single supply of hydrocarbon-based materials, and the amount of SCR catalyst can be reduced by the increased performance, and as a result, the SCR device can be made small. However, as hydrogen (H 2 ) is generated by inducing a chemical reaction of a hydrocarbon-based material, the treatment cost increases as the mixing ratio of the hydrogen (H 2 ) supplied to the SCR device 140 increases. .

상기 수소생성장치(120)는 기상의 탄화수소계 물질 또는 액상의 탄화수소계 물질로부터 수소(H2)를 생성하여 SCR 장치(140)로 공급하는 역할을 한다. 상기 수소생성장치(120)로부터 생성되어 SCR 장치(140)로 공급되는 수소(H2)는 탄화수소계 물질과 함께 질소산화물(NOx)를 질소(N2)로 환원시키는 역할을 한다. 수소(H2)에 의한 질소산화물(NOx)의 환원 효율은 탄화수소계 물질에 의한 환원 효율에 버금가지만 탄화수소계 물질의 화학 반응을 유도하여 수소(H2)를 생성함에 따라, SCR 장치(140)에 공급되는 수소(H2)의 혼합비율이 높아질수록 처리비용이 증가되는 면을 고려해야 한다. The hydrogen generation device 120 serves to generate hydrogen (H 2 ) from a gaseous hydrocarbon-based material or a liquid hydrocarbon-based material and supply it to the SCR device 140. Hydrogen (H 2 ) generated from the hydrogen generating device 120 and supplied to the SCR device 140 serves to reduce nitrogen oxides (NO x ) to nitrogen (N 2 ) together with a hydrocarbon-based material. The reduction efficiency of nitrogen oxides (NO x ) by hydrogen (H 2 ) is comparable to that of the hydrocarbon-based material, but as hydrogen (H 2 ) is generated by inducing a chemical reaction of the hydrocarbon-based material, the SCR device 140 The higher the mixing ratio of hydrogen (H 2 ) supplied to ), the higher the treatment cost should be considered.

수소(H2)는 탄화수소계 물질과 물(H2O)의 반응에 의해 생성된다. 일 실시예로, 기상의 탄화수소계 물질인 메탄(CH4)을 이용한 수소생성반응은 아래의 화학반응식 1과 같고, 액상의 탄화수소계 물질인 메탄올(CH3OH)을 이용한 수소생성반응은 아래의 화학반응식 2와 같다. Hydrogen (H 2 ) is produced by the reaction of a hydrocarbon-based material and water (H 2 O). As an example, the hydrogen generation reaction using methane (CH 4 ) as a gaseous hydrocarbon-based material is the same as in Chemical Reaction Formula 1 below, and the hydrogen generation reaction using methanol (CH 3 OH) as a liquid hydrocarbon-based material is as follows. It is shown in Chemical Reaction Formula 2.

<화학반응식 1 - 메탄을 이용한 수소생성반응><Chemical Reaction Formula 1-Hydrogen generation reaction using methane>

CH4 + H2O ↔ 3H2 + COCH 4 + H 2 O ↔ 3H 2 + CO

CH4 + 2H2O ↔ 4H2 + CO2 CH 4 + 2H 2 O ↔ 4H 2 + CO 2

<화학반응식 2 - 메탄올을 이용한 수소생성반응><Chemical Reaction Scheme 2-Hydrogen generation reaction using methanol>

CH3OH + H2O ↔ 3H2 + CO2 CH 3 OH + H 2 O ↔ 3H 2 + CO 2

한편, 탄화수소계 물질과 수소(H2)에 의한 질소산화물(NOx)의 환원 반응은 다음과 같다. 전술한 바와 같이 질소산화물(NOx)의 환원 반응에는 탄화수소계 물질이 단독으로 이용되거나 탄화수소계 물질과 수소(H2)가 함께 이용될 수 있다. 기상의 탄화수소계 물질을 수소(H2)와 함께 사용하여 질소산화물(NOx)을 환원시키는 반응은 아래의 화학반응식 3과 같고, 액상의 탄화수소계 물질을 기화시켜 수소(H2)와 함께 사용하여 질소산화물(NOx)을 환원시키는 반응은 아래의 화학반응식 4와 같다. 화학반응식 3은 기상의 탄화수소계 물질로 메탄을 이용한 예이고, 화학반응식 4는 액상의 탄화수소계 물질로 메탄올을 이용한 예이다. Meanwhile, the reduction reaction of the nitrogen oxide (NO x ) by the hydrocarbon-based material and hydrogen (H 2 ) is as follows. As described above, in the reduction reaction of nitrogen oxide (NO x ), a hydrocarbon-based material may be used alone, or a hydrocarbon-based material and hydrogen (H 2 ) may be used together. The reaction of reducing nitrogen oxides (NO x ) by using a gaseous hydrocarbon-based material with hydrogen (H 2 ) is as shown in Chemical Reaction Formula 3 below, and the liquid hydrocarbon-based material is vaporized and used with hydrogen (H 2 ). The reaction to reduce nitrogen oxide (NO x ) is shown in Chemical Reaction Formula 4 below. Chemical Reaction Scheme 3 is an example of using methane as a gaseous hydrocarbon-based material, and Chemical Reaction Scheme 4 is an example of using methanol as a liquid hydrocarbon-based material.

<화학반응식 3 - 메탄과 수소를 이용한 질소산화물 환원반응><Chemical Reaction Formula 3-Reduction of nitrogen oxides using methane and hydrogen>

CH4 + 2NO + O2 → N2 + CO2 + 2H2OCH 4 + 2NO + O 2 → N 2 + CO 2 + 2H 2 O

CH4 + O2 + NOx + H2 → CO2[CO] + N2 + H2O + NH3 CH 4 + O 2 + NO x + H 2 → CO 2 [CO] + N 2 + H 2 O + NH 3

<화학반응식 4 - 메탄올과 수소를 이용한 질소산화물 환원반응><Chemical Reaction Formula 4-Reduction of nitrogen oxides using methanol and hydrogen>

4CH3OH + 2NO + O2 → N2 + 4CO2 + 8H2O4CH 3 OH + 2NO + O 2 → N 2 + 4CO 2 + 8H 2 O

CH3OH + O2 + NOx + H2 → CO2[CO] + N2 + H2O + NH3 CH 3 OH + O 2 + NO x + H 2 → CO 2 [CO] + N 2 + H 2 O + NH 3

상술한 바와 같이 본 발명의 일 실시예에 따른 환원제 공급장치는 선박의 연료원으로 사용 가능한 기상의 탄화수소계 물질 또는 액상의 탄화수소계 물질(기화된)을 SCR 장치(140)에 단독 투입하여 수소(H2)와 함께 투입하여 질소산화물의 환원을 유도하는 방식임에 따라, 우레아 사용시 필수적으로 요구되는 우레아 가수분해장치, 우레아 저장탱크, 우레아 기화장치(vaporizer) 등의 장치 구성이 요구되지 않는다. As described above, in the reducing agent supplying device according to an embodiment of the present invention, a gaseous hydrocarbon-based material or a liquid hydrocarbon-based material (gasified) that can be used as a fuel source of a ship is individually injected into the SCR device 140 to generate hydrogen ( As it is a method of inducing the reduction of nitrogen oxides by inputting together with H 2 ), the urea hydrolysis device, urea storage tank, and urea vaporizer are not required.

110 : 탄화수소계 물질 공급장치 120 : 수소생성장치
130 : 기화장치 140 : SCR 장치110: hydrocarbon-based material supply device 120: hydrogen generation device
130: vaporizer 140: SCR device

Claims (9)

SCR 장치에 탄화수소계 물질을 공급하여 탄화수소계 물질에 의한 질소산화물의 환원을 유도하는 탄화수소계 물질 공급장치; 및
탄화수소계 물질로부터 수소를 생생함과 함께 생성된 수소를 SCR 장치에 공급하여 질소산화물의 환원을 유도하는 수소생성장치를 포함하여 이루어지는 것을 특징으로 하는 SCR 시스템의 환원제 공급장치.
A hydrocarbon-based material supply device for supplying a hydrocarbon-based material to the SCR device to induce reduction of nitrogen oxides by the hydrocarbon-based material; And
A reducing agent supplying device of an SCR system, comprising: a hydrogen generating device for inducing reduction of nitrogen oxides by supplying hydrogen generated while generating hydrogen from a hydrocarbon-based material to the SCR device.
 제 1 항에 있어서, SCR 장치에 탄화수소계 물질이 단독으로 공급되는 것을 특징으로 하는 SCR 시스템의 환원제 공급장치.
The reducing agent supply device of an SCR system according to claim 1, wherein a hydrocarbon-based material is supplied to the SCR device alone.
 제 1 항에 있어서, SCR 장치에 탄화수소계 물질과 수소가 함께 공급되는 것을 특징으로 하는 SCR 시스템의 환원제 공급장치.
The reducing agent supply device of an SCR system according to claim 1, wherein a hydrocarbon-based material and hydrogen are supplied to the SCR device together.
 제 1 항에 있어서, 상기 탄화수소계 물질은 기상의 탄화수소계 물질 또는 액상의 탄화수소계 물질인 것을 특징으로 하는 SCR 시스템의 환원제 공급장치.
The reducing agent supplying device of an SCR system according to claim 1, wherein the hydrocarbon-based material is a gaseous hydrocarbon-based material or a liquid hydrocarbon-based material.
 제 4 항에 있어서, 상기 기상의 탄화수소계 물질은 메탄(CH4), 에탄(C2H6), 프로판(C3H8), 부탄(C4H10), 다이메틸에터(C2H6O) 중 어느 하나 또는 이들의 혼합물이거나 액화석유가스(LPG) 또는 액화천연가스(LNG)인 것을 특징으로 하는 SCR 시스템의 환원제 공급장치.
The method of claim 4, wherein the gaseous hydrocarbon-based material is methane (CH 4 ), ethane (C 2 H 6 ), propane (C 3 H 8 ), butane (C 4 H 10 ), dimethyl ether (C 2 H 6 O) any one or a mixture thereof, or liquefied petroleum gas (LPG) or liquefied natural gas (LNG).
 제 4 항에 있어서, 상기 액상의 탄화수소계 물질은 메탄올(CH3OH), 에탄올(C2H5OH), 프로판올(C3H7OH), 부탄올(C4H9OH), 바이오디젤, 바이오에탄올 중 어느 하나 또는 이들의 혼합물인 것을 특징으로 하는 SCR 시스템의 환원제 공급장치.
The method of claim 4, wherein the liquid hydrocarbon-based material is methanol (CH 3 OH), ethanol (C 2 H 5 OH), propanol (C 3 H 7 OH), butanol (C 4 H 9 OH), biodiesel, Reducing agent supply device of the SCR system, characterized in that any one of bioethanol or a mixture thereof.
 제 1 항에 있어서, 액상의 탄화수소계 물질을 기화시켜 SCR 장치에 공급하는 기화장치가 더 구비되는 것을 특징으로 하는 SCR 시스템의 환원제 공급장치.
The reducing agent supplying device of an SCR system according to claim 1, further comprising a vaporizer for vaporizing a liquid hydrocarbon-based material and supplying it to the SCR device.
 제 1 항에 있어서, 상기 탄화수소계 물질은 선박의 연료원 또는 수송을 위해 적재된 탄화수소계 물질인 것을 특징으로 하는 SCR 시스템의 환원제 공급장치.
The reducing agent supply device of claim 1, wherein the hydrocarbon-based material is a fuel source of a ship or a hydrocarbon-based material loaded for transportation.
 제 1 항에 있어서, 상기 수소생성장치는 탄화수소계 물질과 물(H2O)의 반응을 통해 수소(H2)를 생성시키는 것을 특징으로 하는 SCR 시스템의 환원제 공급장치. The reducing agent supply device of claim 1, wherein the hydrogen generating device generates hydrogen (H 2 ) through a reaction of a hydrocarbon-based material and water (H 2 O).
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JP2009079539A (en) 2007-09-26 2009-04-16 Mitsubishi Heavy Ind Ltd Exhaust emission control system and exhaust gas cleaning method
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JP2009079539A (en) 2007-09-26 2009-04-16 Mitsubishi Heavy Ind Ltd Exhaust emission control system and exhaust gas cleaning method
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