KR20210105659A - Apparatus for regenerating catalyst of scr system - Google Patents

Apparatus for regenerating catalyst of scr system Download PDF

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KR20210105659A
KR20210105659A KR1020200020405A KR20200020405A KR20210105659A KR 20210105659 A KR20210105659 A KR 20210105659A KR 1020200020405 A KR1020200020405 A KR 1020200020405A KR 20200020405 A KR20200020405 A KR 20200020405A KR 20210105659 A KR20210105659 A KR 20210105659A
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South Korea
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scr
scr catalyst
abs
temperature
pressure
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KR1020200020405A
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Korean (ko)
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윤우희
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윤우희
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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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J38/00—Regeneration or reactivation of catalysts, in general
    • B01J38/02—Heat treatment
    • 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
    • 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
    • F01N2240/16—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 electric heater, i.e. a resistance heater
    • 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
    • F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
    • F01N2410/14—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device in case of excessive pressure, e.g. using a safety valve
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
    • 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

Abstract

The present invention relates to an apparatus and method for regenerating an SCR catalyst of an SCR system, which are able to, when ammonium bisulfate (ABS, NH4HSO4) sticks to the SCR catalyst and the back pressure in the SCR reactor becomes a preset value or higher, increase the temperature around the catalyst to a temperature for removing the ABS or higher, and remove the ABS stuck to the SCR catalyst. To this end, in accordance with the present invention, the apparatus for regenerating the SCR catalyst of the SCR system desirably comprises: an SCR reactor which includes the SCR catalyst for removing hazardous substances in exhaust gas; a pressure measuring means installed in the SCR reactor for measuring the pressure; a temperature measuring means installed in the SCR reactor for measuring the temperature; a heating means raising the temperature around the SCR catalyst; and a control unit which, when the pressure measured by the pressure measuring means is a preset value or higher, controls the heating means and raises the temperature around the SCR catalyst to a gasification temperature of the ABS or higher. Accordingly, the present invention is able to raise the temperature around the catalyst to a temperature for removing the ABS or higher, gasify the ABS, remove the ABS stuck to the SCR catalyst, improve the performance of the SCR catalyst, and extend operational life.

Description

SCR 시스템의 SCR 촉매 재생 장치{APPARATUS FOR REGENERATING CATALYST OF SCR SYSTEM}SCR catalyst regeneration device of SCR system

본 발명은 SCR 시스템의 SCR 촉매 재생 장치에 관한 것으로서, 특히 SCR 촉매에 ABS(Ammonium Bisulfate:NH4HSO4)가 달라붙어 SCR 반응기 내 배압이 기설정된 값 이상이 되면, 촉매 주변 온도를 ABS 제거 가능한 온도 이상으로 올려 SCR 촉매에 달라붙은 ABS를 제거할 수 있도록 하는 SCR 시스템의 SCR 촉매 재생 장치에 관한 것이다.The present invention relates to an SCR catalyst regeneration apparatus of an SCR system, and in particular, when the back pressure in the SCR reactor is higher than a preset value because ABS (Ammonium Bisulfate: NH4HSO4) is attached to the SCR catalyst, the ambient temperature of the catalyst is set to be higher than the ABS removable temperature. It relates to an SCR catalyst regeneration device of an SCR system that can remove ABS adhering to the SCR catalyst.

일반적으로 선박에는 선박을 추진시키기 위해 프로펠러를 구동하는 메인 엔진과 선박에 탑재된 각종 장비나 의장품 등에 전원을 공급하기 위한 다수의 발전용 엔진 등이 설치되어 운영되고 있다.In general, a main engine for driving a propeller to propel a ship and a plurality of engines for power generation for supplying power to various equipment or equipment mounted on the ship are installed and operated.

이러한 선박 엔진에서 연소 후 배출되는 배기 가스에는 다수의 부유성 미립자와 질소 산화물인 NOx, 황산화물인 SOx 등의 유해성 물질이 포함되어 있다.Exhaust gas discharged after combustion from such a marine engine contains a large number of suspended particulates and harmful substances such as NOx, which is nitrogen oxide, and SOx, which is sulfur oxide.

따라서 엔진의 배기 라인에는 매연 여과 장치(DPF:Diesel Particulate Filter), 선택적 촉매 환원 장치(SCR:Selective Catalytic Reduction), 스크러버(Scrubber, SOx 제거) 등을 설치하여 배기 가스 내의 유해 성분을 제거하고 있다.Therefore, a diesel particulate filter (DPF), a selective catalytic reduction (SCR), a scrubber (SOx removal), etc. are installed in the exhaust line of the engine to remove harmful components in the exhaust gas.

이 중에서 SCR 시스템은 배기 가스 내의 질소 산화물(NOx)을 촉매(Catalyst) 층에서 암모니아(NH3), 우레아(Urea) 등의 환원제와의 화학적 반응을 통해 인체에 무해한 물과 질소로 분해한 후 배출시키는 장치이다.Among them, the SCR system decomposes nitrogen oxides (NOx) in the exhaust gas into water and nitrogen harmless to the human body through chemical reaction with reducing agents such as ammonia (NH3) and urea in the catalyst layer and then discharges them. it is a device

여기서 SCR 촉매(Catalyst)는 압출 혹은 금속성 코팅이 형성된 다공질 촉매 필터로 이루어진 것으로서, 배기 라인에 설치된 SCR 반응기 내에 한 개 또는 두 개가 연속 설치되어 배기 가스 내의 유해 성분을 제거하게 된다.Here, the SCR catalyst (Catalyst) is composed of a porous catalyst filter with extrusion or metallic coating, and one or two SCR reactors installed in the exhaust line are continuously installed to remove harmful components in the exhaust gas.

한편 SCR 시스템이 배기 가스 내의 질소 산화물(NOx)을 제거할 때 ABS(Ammonium Bisulfate:NH4HSO4)와 같은 부산물이 생성되는데, ABS는 특정 온도(예를 들어, 340도) 이상에서는 기체 상태가 되지만, 특정 온도 이하에서는 액체 상태가 된다.On the other hand, when the SCR system removes nitrogen oxides (NOx) in the exhaust gas, by-products such as ABS (Ammonium Bisulfate: NH4HSO4) are generated. Below the temperature, it becomes liquid.

이 액체 상태의 ABS가 SCR 촉매에 달라붙게 되면, 다공질 촉매가 막히게 되어 배압이 높아지고, SCR 촉매 표면의 활성점을 덮어버려 SCR 촉매의 성능이 저하되는 문제점이 있다.When the liquid ABS adheres to the SCR catalyst, the porous catalyst is clogged and the back pressure is increased, and there is a problem in that the SCR catalyst performance is deteriorated by covering the active sites on the surface of the SCR catalyst.

공개특허 제10-2014-0041098호,배기가스를 이용한 SCR 촉매 클리닝 시스템, (공개일 : 2014년 04월 04일)Patent Publication No. 10-2014-0041098, SCR catalyst cleaning system using exhaust gas, (published on April 04, 2014)

본 발명은 전술한 문제점을 해결하기 위해 안출된 것으로서, SCR 반응기 내 배압을 측정하여 배압이 기설정된 값 이상이 되면, SCR 촉매에 ABS가 달라붙은 것으로 판단하여, 촉매 주변 온도를 ABS 제거 가능한 온도 이상으로 올려 SCR 촉매에 달라붙은 ABS를 제거할 수 있도록 하는 SCR 시스템의 SCR 촉매 재생 장치를 제공한다.The present invention has been devised to solve the above problems, and when the back pressure in the SCR reactor is measured and the back pressure is above a preset value, it is determined that the ABS is attached to the SCR catalyst, and the temperature around the catalyst is higher than the temperature at which the ABS can be removed. It provides an SCR catalyst regeneration device of the SCR system that can remove the ABS stuck to the SCR catalyst by lifting it up.

전술한 목적을 달성하기 위한 본 발명의 일 실시예에 따른 SCR 시스템의 SCR 촉매 재생 장치는, 배기 가스 내의 유해 성분을 제거하는 SCR 촉매가 설치된 SCR 반응기; 상기 SCR 반응기 내에 설치되어 압력을 측정하는 압력 측정 수단; 상기 SCR 반응기 내에 설치되어 온도를 측정하는 온도 측정 수단; 상기 SCR 촉매의 주변 온도를 상승시키는 히팅 수단; 및 상기 압력 측정 수단을 통해 측정된 상기 압력이 기설정 값 이상이면, 상기 히팅 수단을 제어하여 상기 SCR 촉매의 주변 온도를 ABS(Ammonium Bisulfate:NH4HSO4)의 기화 온도 이상으로 상승시키는 제어부;를 포함하여 이루어지는 것이 바람직하다.SCR catalyst regeneration apparatus of an SCR system according to an embodiment of the present invention for achieving the above object, the SCR reactor for removing harmful components in exhaust gas is installed SCR reactor; a pressure measuring means installed in the SCR reactor to measure the pressure; a temperature measuring means installed in the SCR reactor to measure a temperature; heating means for increasing the ambient temperature of the SCR catalyst; And if the pressure measured through the pressure measuring means is greater than or equal to a preset value, a control unit for controlling the heating means to increase the ambient temperature of the SCR catalyst to above the vaporization temperature of the ABS (Ammonium Bisulfate: NH4HSO4); Including; It is desirable to do

본 발명의 SCR 시스템의 SCR 촉매 재생 장치에 따르면, 촉매 주변 온도를 ABS 제거 가능한 온도 이상으로 올려 ABS를 기화시켜 SCR 촉매에 달라붙은 ABS를 제거함으로써, SCR 촉매의 성능을 향상시키고, 수명을 연장시킬 수 있게 된다.According to the SCR catalyst regeneration apparatus of the SCR system of the present invention, the performance of the SCR catalyst is improved and the lifespan is extended by raising the ambient temperature of the catalyst above the temperature at which ABS can be removed to vaporize the ABS to remove the ABS adhering to the SCR catalyst. be able to

도 1은 본 발명의 일 실시예에 따른 SCR 촉매 재생 장치를 포함하는 SCR 시스템의 구성을 개략적으로 보인 도면이다.1 is a diagram schematically showing the configuration of an SCR system including an SCR catalyst regeneration apparatus according to an embodiment of the present invention.

이하 설명되는 본 발명은 다양한 변환을 가할 수 있고, 여러 가지 실시 예를 가질 수 있는 바, 특정 실시 예들을 도면에 예시하고 상세한 설명에서 상세하게 설명하고자 한다.The present invention described below can apply various transformations and can have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description.

그러나, 이는 본 발명을 특정한 실시 형태에 대해 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변환, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다. 본 발명을 설명함에 있어서 관련된 공지 기술에 대한 구체적인 설명이 본 발명의 요지를 흐릴 수 있다고 판단되는 경우 그 상세한 설명을 생략한다.However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

본 출원에서 사용한 용어는 단지 특정한 실시예를 설명하기 위해 사용된 것으로, 본 발명을 한정하려는 의도가 아니다. 단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다. 본 출원에서, "포함하다" 또는 "가지다" 등의 용어는 명세서상에 기재된 특징, 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것이 존재함을 지정하려는 것이지, 하나 또는 그 이상의 다른 특징들이나 숫자, 단계, 동작, 구성요소, 부품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다.The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

또한 제1, 제2 등의 용어는 다양한 구성요소들을 구분하여 설명하기 위해 사용될 수 있지만, 상기 구성 요소들은 상기 용어들에 의해 한정되어서는 안 된다. 상기 용어들은 하나의 구성요소를 다른 구성요소로부터 구별하는 목적으로만 사용된다.Also, terms such as first, second, etc. may be used to distinguish and describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

또한 본 출원에서 적어도 2개의 상이한 실시예들이 각각 기재되어 있을 경우, 본 발명의 기술적 사상을 벗어나지 않는 범위에서 별다른 기재가 없더라도 각 실시예들은 구성요소의 전부 또는 일부를 상호 병합 및 혼용하여 사용할 수 있다.In addition, when at least two different embodiments are described in the present application, all or part of the components may be used by merging and mixing with each other even if there is no particular description within the scope not departing from the technical spirit of the present invention. .

도 1은 본 발명의 일 실시예에 따른 SCR 촉매 재생 장치를 포함하는 SCR 시스템의 구성을 개략적으로 보인 도면이다.1 is a diagram schematically showing the configuration of an SCR system including an SCR catalyst regeneration apparatus according to an embodiment of the present invention.

도 1을 참조하면, SCR 반응기(10)는 배기 가스 내의 유해 성분을 제거하는 SCR 촉매(15)가 설치된다.Referring to FIG. 1 , the SCR reactor 10 is provided with an SCR catalyst 15 for removing harmful components in the exhaust gas.

환원제 주입기(20)는 제어부(90)의 제어하에, SCR 반응기(10)로 유입되는 배기 가스에 환원제를 분사하여 주입한다.The reducing agent injector 20 injects and injects the reducing agent into the exhaust gas flowing into the SCR reactor 10 under the control of the controller 90 .

혼합기(30)는 배기 가스 라인(40)을 통해 유입되는 배기 가스와 환원제 주입기(20)에 의해 분사 주입되는 환원제를 혼합하여 SCR 반응기(10)로 공급한다.The mixer 30 mixes the exhaust gas introduced through the exhaust gas line 40 and the reducing agent injected by the reducing agent injector 20 and supplies it to the SCR reactor 10 .

배기 가스 라인(40)은 주기 엔진(미도시)의 배기 가스를 SCR 반응기(10)로 유도한다.The exhaust gas line 40 leads the exhaust gas of the main engine (not shown) to the SCR reactor 10 .

밸브(45)는 배기 가스 라인(40) 상에 설치되며, 제어부(90)의 제어하에 개폐된다.The valve 45 is installed on the exhaust gas line 40 and is opened and closed under the control of the controller 90 .

바이패스(By-Pass) 라인(50)은 버너, 히터 등의 작동에 이용되는 보조 기기 엔진(미도시)(이하, '보기 엔진'이라 한다)에서 배출되는 고온의 배기 가스를 SCR 반응기(10)로 유도한다.By-pass line 50 is a high-temperature exhaust gas discharged from an auxiliary engine (not shown) (hereinafter referred to as 'bogie engine') used for operation of a burner, a heater, etc. ) leads to

바이패스 밸브(55)는 바이패스 라인(50) 상에 설치되며, 제어부(90)의 제어하에 개폐된다.The bypass valve 55 is installed on the bypass line 50 and is opened and closed under the control of the controller 90 .

압력 측정 수단(60)은 SCR 반응기(10) 내에 설치되어 압력을 측정하고, 측정된 압력을 제어부(90)로 인가한다.The pressure measuring means 60 is installed in the SCR reactor 10 to measure the pressure, and applies the measured pressure to the controller 90 .

전술한 압력 측정 수단(60)은 SCR 반응기(10) 내에 구비된 SCR 촉매(15)의 전단과 후단에 설치되어 각각의 압력을 측정하고, 측정된 두 압력의 차를 측정하여 제어부(90)로 인가하는 차압계(PDT:Pressure Differential Transmitter)로 구현될 수 있다.The above-described pressure measuring means 60 is installed at the front and rear ends of the SCR catalyst 15 provided in the SCR reactor 10 to measure the respective pressures, measure the difference between the two measured pressures, and to the control unit 90 . It may be implemented as a pressure differential transmitter (PDT) that applies.

온도 측정 수단(70)은 SCR 반응기(10) 내에 설치되어 온도를 측정하고, 측정된 온도를 제어부(90)로 인가한다. 전술한 온도 측정 수단(70)은 SCR 촉매(15)의 전단과 후단 등에 설치될 수 있다.The temperature measuring means 70 is installed in the SCR reactor 10 to measure the temperature, and applies the measured temperature to the controller 90 . The above-described temperature measuring means 70 may be installed at the front and rear ends of the SCR catalyst 15 .

히팅 수단(80)은 제어부(90)의 제어하에 동작하여 SCR 촉매(15)의 주변 온도를 상승시킨다.The heating means 80 operates under the control of the controller 90 to raise the ambient temperature of the SCR catalyst 15 .

전술한 히팅 수단(80)은 SCR 촉매(15)의 테두리(Casing), SCR 촉매(15)의 조립 후 연결부, SCR 반응기(10)의 외면 중에서 어느 한 곳에 설치될 수 있다.The above-described heating means 80 may be installed in any one of the rim of the SCR catalyst 15 , the connection part after assembly of the SCR catalyst 15 , and the outer surface of the SCR reactor 10 .

또한 히팅 수단(80)은 히팅 코일, 히팅 자켓 등으로 구현될 수 있다.In addition, the heating means 80 may be implemented as a heating coil, a heating jacket, and the like.

또한 히팅 수단(80)은 열풍기(미도시)로 구현될 수 있으며, 열풍기(미도시)에 의해 가열된 공기는 바이패스 라인(50)을 통해 SCR 반응기(10)로 유도된다.In addition, the heating means 80 may be implemented as a hot air blower (not shown), and the air heated by the hot air blower (not shown) is guided to the SCR reactor 10 through the bypass line 50 .

제어부(90)는 SCR 시스템의 구동에 따라 배기 가스 내의 질소 산화물(NOx)을 제거하는 중에 압력 측정 수단(60)을 통해 측정된 압력이 인가되면, 측정된 압력이 제1설정값 이상인지를 확인한다.When the pressure measured through the pressure measuring means 60 is applied while the control unit 90 is removing nitrogen oxides (NOx) in the exhaust gas according to the operation of the SCR system, it is checked whether the measured pressure is equal to or greater than the first set value. do.

측정된 압력을 확인한 결과 측정된 압력이 제1설정값 이상이면, ABS가 SCR 촉매(15)에 달라붙어 다공질의 SCR 촉매(15)가 막혀 배압이 높아진 것으로 판단하고, SCR 촉매(15)에 달라붙은 ABS를 제거하기 위해 히팅 수단(80)을 제어하여 SCR 촉매(15)의 주변 온도를 ABS가 기화되어 날아 갈 수 있는 특정 온도(이하, 'ABS의 기화 온도'라 한다)(예를 들어, 340도) 이상으로 상승시킨다.As a result of checking the measured pressure, if the measured pressure is greater than or equal to the first set value, it is determined that the ABS adheres to the SCR catalyst 15 and the porous SCR catalyst 15 is clogged, thereby increasing the back pressure, and differs from the SCR catalyst 15 By controlling the heating means 80 to remove the adhering ABS, the ambient temperature of the SCR catalyst 15 is a specific temperature at which the ABS is vaporized and blown away (hereinafter referred to as the 'evaporation temperature of ABS') (for example, 340 degrees) or higher.

이때 제어부(90)는 측정된 압력이 제1설정 값 이상이면, 환원제 주입기(20)의 동작을 제어하여 환원제 주입을 정지시킨 후, 히팅 수단(80)을 제어하여 SCR 촉매(15)의 주변 온도를 ABS의 기화 온도 이상으로 상승시키는 것이 바람직하다.At this time, when the measured pressure is greater than or equal to the first set value, the control unit 90 controls the operation of the reducing agent injector 20 to stop the reducing agent injection, and then controls the heating means 80 to control the ambient temperature of the SCR catalyst 15 . It is preferable to raise the to above the vaporization temperature of ABS.

또한 제어부(90)는 측정된 압력이 제1설정 값 이상이면, 바이패스 밸브(55)가 개방되도록 제어하여, 보기 엔진(미도시)에서 배출되는 고온의 배기 가스를 이용하여 SCR 촉매(15)의 주변 온도를 ABS의 기화 온도 이상으로 상승시킬 수도 있다.In addition, when the measured pressure is equal to or greater than the first set value, the control unit 90 controls the bypass valve 55 to open, and uses the high-temperature exhaust gas discharged from the bogie engine (not shown) to activate the SCR catalyst 15 . It is also possible to raise the ambient temperature of the ABS above the vaporization temperature of the ABS.

이때 제어부(90)는 측정된 압력이 제1설정 값 이상이면, 환원제 주입기(20)의 동작을 제어하여 환원제 주입을 정지시킨 후, 바이패스 밸브(55)가 개방되도록 제어하여, 보기 엔진(미도시)에서 배출되는 고온의 배기 가스를 이용하여 SCR 촉매(15)의 주변 온도를 ABS의 기화 온도 이상으로 상승시키는 것이 바람직하다.At this time, when the measured pressure is equal to or greater than the first set value, the control unit 90 controls the operation of the reducing agent injector 20 to stop the reducing agent injection, and then controls the bypass valve 55 to open, so that the bogie engine (not shown) City), it is preferable to increase the ambient temperature of the SCR catalyst 15 above the vaporization temperature of ABS by using the high-temperature exhaust gas discharged from the gas.

또한 제어부(90)는 측정된 압력이 제1설정 값 이상이면, 히팅 수단(80)과 바이패스 밸브(55)를 모두 제어하여 SCR 촉매(15)의 주변 온도를 ABS의 기화 온도 이상으로 상승시킬 수도 있다.In addition, when the measured pressure is equal to or greater than the first set value, the control unit 90 controls both the heating means 80 and the bypass valve 55 to increase the ambient temperature of the SCR catalyst 15 above the vaporization temperature of the ABS. may be

이때 제어부(90)는 측정된 압력이 제1설정 값 이상이면, 환원제 주입기(20)의 동작을 제어하여 환원제 주입을 정지시킨 후, 히팅 수단(80)과 바이패스 밸브(55)를 모두 제어하여 SCR 촉매(15)의 주변 온도를 ABS의 기화 온도 이상으로 상승시키는 것이 바람직하다.At this time, if the measured pressure is greater than or equal to the first set value, the control unit 90 controls the operation of the reducing agent injector 20 to stop the reducing agent injection, and then controls both the heating means 80 and the bypass valve 55 to It is preferable to raise the ambient temperature of the SCR catalyst 15 above the vaporization temperature of ABS.

또한 제어부(90)는 측정된 압력이 제1설정 값 이상이면, 열풍기(미도시)와 바이패스 밸브(55)를 제어하여 열풍기(미도시)에 의해 가열된 공기를 SCR 반응기(10)로 유입시켜 SCR 촉매(15)의 주변 온도를 ABS의 기화 온도 이상으로 상승시킬 수도 있다.In addition, if the measured pressure is equal to or greater than the first set value, the controller 90 controls the hot air blower (not shown) and the bypass valve 55 to introduce the air heated by the hot air blower (not shown) into the SCR reactor 10 . By doing so, the ambient temperature of the SCR catalyst 15 may be raised above the vaporization temperature of ABS.

이때 제어부(90)는 측정된 압력이 제1설정 값 이상이면, 환원제 주입기(20)의 동작을 제어하여 환원제 주입을 정지시킨 후, 열풍기(미도시)와 바이패스 밸브(55)를 제어하여 SCR 촉매(15)의 주변 온도를 ABS의 기화 온도 이상으로 상승시키는 것이 바람직하다.At this time, if the measured pressure is greater than or equal to the first set value, the control unit 90 controls the operation of the reducing agent injector 20 to stop the reducing agent injection, and then controls the hot air blower (not shown) and the bypass valve 55 to control the SCR It is desirable to raise the ambient temperature of the catalyst 15 above the vaporization temperature of the ABS.

앞서 설명한 바와 같이 SCR 촉매(15)의 주변 온도를 ABS의 기화 온도 이상으로 상승시킬 때, 제어부(90)는 히팅 수단(80)과 바이패스 밸브(55) 중에서 적어도 어느 하나를 기설정된 시간 동안만 제어하거나, 측정된 압력이 제2설정 값 이하가 될 때까지 제어할 수 있다(제1설정 값>제2설정 값)As described above, when raising the ambient temperature of the SCR catalyst 15 above the vaporization temperature of ABS, the control unit 90 operates at least one of the heating means 80 and the bypass valve 55 only for a predetermined time. or until the measured pressure becomes less than or equal to the second set value (first set value > second set value)

한편 제어부(90)는 압력 측정 수단(60)을 통해 측정된 압력에 상관없이 주기적으로 히팅 수단(80)과 바이패스 밸브(55) 중에서 적어도 어느 하나를 제어하여 SCR 촉매(15)의 주변 온도를 ABS의 기화 온도 이상으로 상승시킬 수 있다.Meanwhile, the control unit 90 periodically controls at least one of the heating unit 80 and the bypass valve 55 regardless of the pressure measured through the pressure measuring unit 60 to control the ambient temperature of the SCR catalyst 15 . It can be raised above the vaporization temperature of ABS.

이때 제어부(90)는 기설정된 시간 동안만 히팅 수단(80)과 바이패스 밸브(55) 중에서 적어도 어느 하나를 제어하여 SCR 촉매(15)의 주변 온도를 ABS의 기화 온도 이상으로 상승시킬 수 있다.At this time, the control unit 90 may control at least one of the heating means 80 and the bypass valve 55 only for a preset time to increase the ambient temperature of the SCR catalyst 15 above the vaporization temperature of the ABS.

이상에서 상세하게 설명한 바에 의하면, 본 발명의 SCR 시스템의 SCR 촉매 재생 장치에 따르면, 촉매 주변 온도를 ABS 제거 가능한 온도 이상으로 올려 ABS를 기화시켜 SCR 촉매에 달라붙은 ABS를 제거함으로써, SCR 촉매의 성능을 향상시키고, 수명을 연장시킬 수 있게 된다.As described in detail above, according to the SCR catalyst regeneration apparatus of the SCR system of the present invention, the performance of the SCR catalyst by raising the ambient temperature of the catalyst above the temperature at which ABS can be removed to vaporize the ABS to remove the ABS adhering to the SCR catalyst. can be improved and lifespan can be extended.

한편, 본 도면에 개시된 실시예는 이해를 돕기 위해 특정 예를 제시한 것에 지나지 않으며, 본 발명의 범위를 한정하고자 하는 것은 아니다. 여기에 개시된 실시예 이외에도 본 발명의 기술적 사상에 바탕을 둔 다른 변형예들이 실시 가능하다는 것은, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게는 자명한 것이다.On the other hand, the embodiments disclosed in the drawings are merely presented as specific examples to aid understanding, and are not intended to limit the scope of the present invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

10 : SCR 반응기 15 : SCR 촉매,
20 : 환원제 주입기 30 : 혼합기,
40 : 배기 가스 라인 45 : 밸브,
50 : 바이패스 라인 55 : 바이패스 밸브,
60 : 압력 측정 수단 70 : 온도 측정 수단,
80 : 히팅 수단 90 : 제어부10: SCR reactor 15: SCR catalyst;
20: reducing agent injector 30: mixer,
40: exhaust gas line 45: valve;
50: bypass line 55: bypass valve,
60: pressure measuring means 70: temperature measuring means;
80: heating means 90: control unit

Claims (5)

배기 가스 내의 유해 성분을 제거하는 SCR 촉매가 설치된 SCR 반응기;
상기 SCR 반응기 내에 설치되어 압력을 측정하는 압력 측정 수단;
상기 SCR 반응기 내에 설치되어 온도를 측정하는 온도 측정 수단;
상기 SCR 촉매의 주변 온도를 상승시키는 히팅 수단; 및
상기 압력 측정 수단을 통해 측정된 상기 압력이 기설정 값 이상이면, 상기 히팅 수단을 제어하여 상기 SCR 촉매의 주변 온도를 ABS의 기화 온도 이상으로 상승시키는 제어부;를 포함하고,
상기 제어부는,
상기 압력이 기설정 값 이상이면, 환원제 주입을 정지시킨 후, 상기 히팅 수단을 제어하여 상기 SCR 촉매의 주변 온도를 ABS의 기화 온도 이상으로 상승시키며,
상기 압력 측정 수단은,
상기 SCR 촉매의 전단과 후단에 설치되어 각각의 압력을 측정하고, 측정된 두 압력의 차를 측정하는 차압계이고,
상기 히팅 수단은,
상기 SCR 촉매의 테두리, 상기 SCR 촉매의 조립 후 연결부, 상기 SCR 반응기의 외면 중에서 어느 한 곳에 설치되는 SCR 시스템의 SCR 촉매 재생 장치.SCR reactor installed with an SCR catalyst for removing harmful components in the exhaust gas;
a pressure measuring means installed in the SCR reactor to measure the pressure;
a temperature measuring means installed in the SCR reactor to measure a temperature;
heating means for increasing the ambient temperature of the SCR catalyst; and
When the pressure measured through the pressure measuring means is equal to or greater than a preset value, a control unit for controlling the heating means to raise the ambient temperature of the SCR catalyst to above the vaporization temperature of ABS; includes,
The control unit is
When the pressure is above the preset value, after stopping the reducing agent injection, the heating means is controlled to increase the ambient temperature of the SCR catalyst above the vaporization temperature of ABS,
The pressure measuring means,
It is a differential pressure gauge installed at the front and rear ends of the SCR catalyst to measure each pressure and measure the difference between the two measured pressures,
The heating means,
The SCR catalyst regeneration device of the SCR system is installed in any one of the edge of the SCR catalyst, the connection part after assembly of the SCR catalyst, and the outer surface of the SCR reactor. 제1항에 있어서,
보기 엔진의 배기 가스를 상기 SCR 반응기로 유도하는 바이패스 라인 상에 설치되는 바이패스 밸브;를 더 포함하며,
상기 제어부는, 상기 압력 측정 수단을 통해 측정된 상기 압력이 기설정 값 이상이면, 상기 히팅 수단과 상기 바이패스 밸브 중에서 적어도 어느 하나를 제어하여 상기 SCR 촉매의 주변 온도를 ABS의 기화 온도 이상으로 상승시키는 SCR 시스템의 SCR 촉매 재생 장치.According to claim 1,
It further includes; a bypass valve installed on a bypass line for guiding the exhaust gas of the bogie engine to the SCR reactor,
When the pressure measured by the pressure measuring means is equal to or greater than a preset value, the control unit controls at least one of the heating means and the bypass valve to increase the ambient temperature of the SCR catalyst above the vaporization temperature of the ABS The SCR catalyst regeneration device of the SCR system. 제2항에 있어서,
상기 제어부는,
상기 압력이 기설정 값 이상이면, 환원제 주입을 정지시킨 후, 상기 히팅 수단과 상기 바이패스 밸브 중에서 적어도 어느 하나를 제어하여 상기 SCR 촉매의 주변 온도를 ABS의 기화 온도 이상으로 상승시키는 SCR 시스템의 SCR 촉매 재생 장치.3. The method of claim 2,
The control unit is
When the pressure is above the preset value, after stopping the reducing agent injection, at least one of the heating means and the bypass valve is controlled to raise the ambient temperature of the SCR catalyst to above the vaporization temperature of ABS. Catalyst regeneration device. 제1항에 있어서,
상기 히팅 수단이 열풍기로 구현되는 경우, 상기 열풍기에 의해 가열된 공기를 상기 SCR 반응기로 유도하는 바이패스 라인 상에 설치되는 바이패스 밸브;를 더 포함하며,
상기 제어부는, 상기 압력 측정 수단을 통해 측정된 상기 압력이 기설정 값 이상이면, 상기 열풍기와 상기 바이패스 밸브를 제어하여 상기 SCR 촉매의 주변 온도를 ABS의 기화 온도 이상으로 상승시키는 SCR 시스템의 SCR 촉매 재생 장치.According to claim 1,
When the heating means is implemented as a hot air blower, a bypass valve installed on a bypass line for guiding the air heated by the hot air blower to the SCR reactor; further comprising,
When the pressure measured through the pressure measuring means is equal to or greater than a preset value, the control unit controls the hot air blower and the bypass valve to raise the ambient temperature of the SCR catalyst to above the vaporization temperature of the ABS. Catalyst regeneration device. 제 1항에 있어서,
상기 제어부는,
상기 압력 측정 수단을 통해 측정된 상기 압력에 상관없이 주기적으로 상기 히팅 수단을 제어하여 상기 SCR 촉매의 주변 온도를 ABS의 기화 온도 이상으로 상승시키는 SCR 시스템의 SCR 촉매 재생 장치.The method of claim 1,
The control unit is
The SCR catalyst regeneration apparatus of the SCR system for periodically controlling the heating means regardless of the pressure measured by the pressure measuring means to raise the ambient temperature of the SCR catalyst to above the vaporization temperature of the ABS.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102625011B1 (en) * 2022-12-07 2024-01-16 김명복 Air purification apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140041098A (en) 2012-09-27 2014-04-04 현대중공업 주식회사 Scr catalytic cleaning system using the exhaust gas

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140041098A (en) 2012-09-27 2014-04-04 현대중공업 주식회사 Scr catalytic cleaning system using the exhaust gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102625011B1 (en) * 2022-12-07 2024-01-16 김명복 Air purification apparatus

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