KR101047402B1 - Ｕｒｅａ-ＳＣＲ System - Google Patents

Ｕｒｅａ-ＳＣＲ System Download PDF

Info

Publication number
KR101047402B1
KR101047402B1 KR1020050100005A KR20050100005A KR101047402B1 KR 101047402 B1 KR101047402 B1 KR 101047402B1 KR 1020050100005 A KR1020050100005 A KR 1020050100005A KR 20050100005 A KR20050100005 A KR 20050100005A KR 101047402 B1 KR101047402 B1 KR 101047402B1
Authority
KR
South Korea
Prior art keywords
urea
scr system
swirl
injector
exhaust gas
Prior art date
Application number
KR1020050100005A
Other languages
Korean (ko)
Other versions
KR20070044093A (en
Inventor
김건태
Original Assignee
현대자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020050100005A priority Critical patent/KR101047402B1/en
Publication of KR20070044093A publication Critical patent/KR20070044093A/en
Application granted granted Critical
Publication of KR101047402B1 publication Critical patent/KR101047402B1/en

Links

Images

Classifications

    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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

본 발명은 Urea-SCR 시스템에 관한 것으로서, 더욱 상세하게는 요소 분무 후 배기가스에 요소가 잘 희석되도록 분무된 곳 후단에 스월생성장치를 설치함으로써, 에어라인을 통해 에어탱크로부터 유입된 공기를 소용돌이(스월;swirl) 치게 하여 배기가스와 요소를 희석시키고, SCR 시스템의 성능을 향상시켜 NOx의 양을 감소시키며, 요소 연비를 증대하여 경제적인 효과를 얻을 수 있도록 한 Urea-SCR 시스템에 관한 것이다.The present invention relates to a Urea-SCR system, and more particularly, by installing a swirl generating device after the urea is sprayed so that the urea is well diluted in the exhaust gas after the urea spray, swirling the air flowing from the air tank through the air line It is a Urea-SCR system that can be used to achieve the economic effect by diluting exhaust gas and urea by swirl, improving the performance of the SCR system, reducing the amount of NOx, and increasing urea fuel economy.

이를 위해, 본 발명은 배기가스 중의 유해물질을 정화하기 위한 촉매기와, 배기파이프에 설치되어 에어공급포트를 통해 유입되는 공기에 의해서 요소를 주입하는 인젝터와, 요소탱크 내의 요소를 인젝터로 공급하는 요소공급펌프로 구성되되, 상기 인젝터에 의해 요소가 분무된 곳 후단에 스월생성장치를 설치하여 배기가스와 요소를 희석시키도록 한 것을 특징으로 하는 Urea-SCR 시스템을 제공한다.To this end, the present invention provides a catalyst for purifying harmful substances in the exhaust gas, an injector installed in the exhaust pipe to inject urea by air flowing through the air supply port, and an element supplying urea in the urea tank to the injector. It is composed of a supply pump, it provides a Urea-SCR system, characterized in that to install a swirl generator after the urea sprayed by the injector to dilute the exhaust gas and urea.

Urea-SCR 시스템, NOx, 스월, 촉매기, 인젝터, 요소공급펌프 Urea-SCR system, NOx, swirl, catalytic converter, injector, urea supply pump

Description

Ｕｒｅａ-ＳＣＲ 시스템{Urea-Selective Catalytic Reduction system}Rea-SCR system {Urea-Selective Catalytic Reduction system}

도 1은 종래의 Urea-SCR 시스템의 구성을 나타내는 장치구성도.1 is a device configuration diagram showing the configuration of a conventional Urea-SCR system.

도 2는 본 발명에 따른 Urea-SCR 시스템의 구성을 나타내는 장치구성도.2 is a device configuration diagram showing the configuration of the Urea-SCR system according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10a : 배기파이프 10b : 중간배기파이프10a: exhaust pipe 10b: intermediate exhaust pipe

11 : 촉매기 12 : 에어공급포트11 catalyst 12 air supply port

13 : 인젝터 14 : 요소공급펌프13: injector 14: urea supply pump

15 : 에어탱크 16 : 스월발생포트15: Air tank 16: Swirl generating port

17 : 에어라인 18 : 요소탱크17: airline 18: urea tank

본 발명은 Urea-SCR 시스템에 관한 것으로서, 더욱 상세하게는 요소 분무 후 배기가스에 요소가 잘 희석되도록 분무된 곳 후단에 스월생성장치를 설치함으로써, 에어라인을 통해 에어탱크로부터 유입된 공기를 소용돌이(스월;swirl) 치게 하여 배기가스와 요소를 희석시키고, SCR 시스템의 성능을 향상시켜 NOx의 양을 감소시키며, 요소 연비를 증대하여 경제적인 효과를 얻을 수 있도록 한 Urea-SCR 시스템에 관한 것이다.The present invention relates to a Urea-SCR system, and more particularly, by installing a swirl generating device after the urea is sprayed so that the urea is well diluted in the exhaust gas after the urea spray, swirling the air flowing from the air tank through the air line It is a Urea-SCR system that can be used to achieve the economic effect by diluting exhaust gas and urea by swirl, improving the performance of the SCR system, reducing the amount of NOx, and increasing urea fuel economy.

자동차는 형태에 따라서 승용차나, 버스 및 트럭 등으로 분류하지만, 같은 차종이라도 사용하는 연료에 따라서 가솔린을 연료로 사용하는 가솔린 차량이나 디젤을 연료로 사용하는 디젤 차량 및 LPG(Liquefied Petroleum Gas)를 연료로 사용하는 LPG 차량으로 부르기도 한다.Although automobiles are classified into passenger cars, buses, and trucks according to their type, the same type of fuel is used for gasoline vehicles using gasoline as a fuel, diesel vehicles using diesel as a fuel, and LPG (Liquefied Petroleum Gas) as fuel. Also known as LPG vehicles.

상기 디젤 차량은 산소 과잉분위기에서 연소되므로 가솔린 엔진에 비해서 유해물질인 NOx의 발생량이 상당히 많고, 린번 분위기에서 연소되므로 NOx를 제거하기가 힘들다. 따라서, NOx제거기술로서 가장 활발히 개발 진행되는 것이 Urea(요소)-SCR(Selective Catalytic Reduction)시스템이다. Since the diesel vehicle is burned in an oxygen-rich atmosphere, the amount of generation of NOx, which is a harmful substance, is considerably higher than that of a gasoline engine, and it is difficult to remove NOx because it is burned in a lean burn atmosphere. Therefore, the most actively developed NOx removal technology is Urea (urea) -SCR (Selective Catalytic Reduction) system.

상기 Urea-SCR 시스템은 요소를 수용액 형태로 배기 가스라인에 공급하여 NOx와 NH2-CO-NH2 (요소;Urea)를 반응시켜 NOx를 N2 + O2 로 변환시키는 방법이다.The Urea-SCR system is a method of converting NOx into N 2 + O 2 by reacting NOx with NH 2 —CO—NH 2 (urea; Urea) by supplying urea to an exhaust gas line in the form of an aqueous solution.

상기 Urea-SCR 시스템은 도 1에 도시한 바와 같이, 엔진의 배기 매니폴드로부터 배기파이프(10a)를 통해 배출되는 배기가스 중의 유해물질을 정화하기 위한 촉매기(11)와, 배기파이프(10a)에 설치되어 에어공급포트(12)를 통해 유입되는 공기에 의해서 요소를 주입하는 인젝터(13)와, 요소탱크(18) 내의 요소를 인젝터(13)로 공급하는 요소공급펌프(14)와, 촉매기(11) 내의 온도를 측정하는 열전대와, 열전대로부터의 입력신호와 엔진측으로부터의 입력신호를 제공받는 DAS와, DAS에서 제공되는 신호에 의거하여 DAS 및 증폭회로를 거쳐 인젝터에 요소주입 제어신호를 출력하는 CPU를 구비하고 있다.As shown in FIG. 1, the Urea-SCR system includes a catalyst 11 and an exhaust pipe 10a for purifying harmful substances in the exhaust gas discharged from the engine exhaust manifold through the exhaust pipe 10a. Injector 13 is installed in the injector 13 to inject the urea by the air flowing through the air supply port 12, the urea supply pump 14 for supplying the urea in the urea tank 18 to the injector 13, and the catalyst The element injection control signal to the injector through the DAS and the amplification circuit based on the thermocouple for measuring the temperature in the machine 11, the DAS receiving the input signal from the thermocouple and the input signal from the engine side, and the signal provided from the DAS. It is provided with a CPU for outputting.

여기서, 상기 촉매기(11)의 열전대측에서 제공되는 온도 데이터와 엔진측에서 제공되는 rpm 데이터는 DAS(Data Acquisition System)로 입력되고, DAS는 입력된 온도 데이터 및 rpm 데이터를 가지고 전체 배기가스량 중에서 NOx량을 산출한 후, 이때의 산출값을 CPU로 전달한다. Here, the temperature data provided from the thermocouple side of the catalyst 11 and the rpm data provided from the engine side are input to a DAS (Data Acquisition System), and the DAS has the input temperature data and rpm data, and among the total exhaust gas amount. After calculating the NOx amount, the calculated value at this time is transferred to the CPU.

상기 CPU는 입력된 산출값에 의거하여 DAS 및 증폭회로를 거쳐 인젝터(13)에 요소주입 제어신호를 출력한다. 즉, 상기 증폭회로를 거치면서 증폭된 신호를 인젝터(13)에 제공하여 이를 듀티제어하게 되며, 인젝터(13)는 요소공급펌프(14)를 통해 요소탱크(18)로부터 유입된 요소를 배기파이프(10a)로 주입하게 된다. The CPU outputs the element injection control signal to the injector 13 via the DAS and amplification circuit based on the input calculated value. That is, the amplified circuit provides the amplified signal to the injector 13 to control the duty. The injector 13 exhausts the urea introduced from the urea tank 18 through the urea supply pump 14. It is injected into (10a).

이렇게 주입된 요소는 NOx와 반응하여 이를 N2 와 O2 로 변환시키게 되며, 촉매기(11)를 거치면서 정화된 배기가스는 중간 배기파이프(10b)를 통해 소음기로 공급된 다음, 엔드 파이프를 통해 대기 중으로 배출된다The injected urea reacts with NOx and converts it into N 2 and O 2. The exhaust gas purified while passing through the catalyst 11 is supplied to the silencer through the intermediate exhaust pipe 10b and then the end pipe is closed. Through the atmosphere

한편, 현재의 Urea-SCR 시스템은 단공 또는 다공의 분무형태를 갖는 인젝터(13)를 사용하고 있다. 이것은 요소의 분무성능을 향상시키기 위하여 기존의 단공형태에서 다공의 분무형태로 발전시킨 형태이다.On the other hand, the current Urea-SCR system uses an injector 13 having a single or porous spray form. This is a form developed from the conventional single-hole form to the porous spray form to improve the spraying performance of the element.

상기 분무성능의 향상은 요소가 암모니아로 분해되고, 배기가스와 혼합되어 최고의 NOx 저감효율을 가져올 수 있다.The improvement of the spraying performance may lead to urea being decomposed into ammonia and mixed with the exhaust gas, resulting in the highest NOx reduction efficiency.

또한, 분무후 배기가스와의 혼합에 필요한 요소의 이동거리가 짧아져 레이아 웃 측면에서 유리하다.In addition, the moving distance of the elements required for mixing with the exhaust gas after spraying is short, which is advantageous in terms of layout.

그러나, 상기 인젝터의 다공홀로 분사하더라도 요소의 분무입자의 크기가 크고, 배기가스와 희석되기 위해 긴 이동거리가 필요하며, 다공으로 분무하더라도 미립화에 한계가 있다.However, even when spraying the porous hole of the injector, the size of the spray particles of the urea is large, a long moving distance is required to be diluted with the exhaust gas, even if sprayed in the porous, there is a limit to atomization.

본 발명은 상기와 같은 점을 감안하여 안출한 것으로서, 요소 분무 후 배기가스에 요소가 잘 희석되도록 분무된 곳 후단에 스월생성장치를 설치함으로써, 에어라인을 통해 에어탱크로부터 유입된 공기를 소용돌이 치게(스월;swirl) 하여 배기가스와 요소를 희석시키고, SCR 시스템의 성능을 향상시켜 NOx의 양을 감소시키며, 요소 연비를 증대하여 경제적인 효과를 얻을 수 있도록 한 Urea-SCR 시스템을 제공하는데 그 목적이 있다.The present invention has been made in view of the above, by installing a swirl generator at the rear end of the sprayed place so that the urea is well diluted in the exhaust gas after urea spraying, to swirl the air introduced from the air tank through the air line Swirl to dilute exhaust gas and urea, improve the performance of the SCR system, reduce the amount of NOx, and increase the urea fuel economy to provide Urea-SCR system. There is this.

상기한 목적을 달성하기 위한 본 발명은 요소를 수용액 형태로 배기 가스라인에 공급하여 NOx를 제거하는 Urea-SCR 시스템에 있어서,In the present invention for achieving the above object in the Urea-SCR system for supplying urea in the form of an aqueous solution to the exhaust gas line to remove NOx,

배기가스 중의 유해물질을 정화하기 위한 촉매기와, 배기파이프에 설치되어 에어공급포트를 통해 유입되는 공기에 의해서 요소를 주입하는 인젝터와, 요소탱크 내의 요소를 인젝터로 공급하는 요소공급펌프로 구성되되, 상기 인젝터에 의해 요소가 분무된 곳 후단에 스월생성장치를 설치하여 배기가스와 요소를 희석시키도록 한 것을 특징으로 한다.It consists of a catalyst for purifying harmful substances in the exhaust gas, an injector installed in the exhaust pipe to inject urea by air flowing through the air supply port, and a urea supply pump to supply urea in the urea tank to the injector. It is characterized in that the swirl generator is installed at the rear end where the urea is sprayed by the injector to dilute the exhaust gas and the urea.

바람직한 구현예로서, 상기 스월생성장치는 에어탱크로부터 에어라인을 거쳐 스월발생포트를 통해 공기를 분사하여 스월(소용돌이)을 발생시키는 것을 특징으로 한다.In a preferred embodiment, the swirl growth value is characterized in that to generate a swirl (swirl) by injecting air from the air tank through the swirl generating port through the air line.

더욱 바람직한 구현예로서, 상기 스월발생포트는 배기파이프에서 단면적이 확장되는 촉매기의 입구에 설치되는 것을 특징으로 한다.In a more preferred embodiment, the swirl generating port is installed at the inlet of the catalyst, the cross-sectional area of the exhaust pipe is expanded.

이하, 본 발명의 바람직한 실시예를 첨부도면을 참조로 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

첨부한 도 2는 본 발명에 따른 Urea-SCR 시스템의 구성을 나타내는 장치구성도이다.2 is a device configuration diagram showing the configuration of the Urea-SCR system according to the present invention.

본 발명은 분무성능을 향상시키기 위해 스월생성장치를 장착한 Urea-SCR 시스템에 관한 것이다.The present invention relates to a Urea-SCR system equipped with a swirl generator to improve spraying performance.

본 발명은 분무성능을 향상시키기 위해 요소의 분무후 분무된 곳 후단에 스월생성장치를 설치한 점에 주안점이 있다.The present invention focuses on the installation of a swirl generator at the rear end of the sprayed place of the urea to improve the spraying performance.

상기 Urea-SCR 시스템은 가솔린 엔진에 비해서 유해물질인 NOx의 발생량이 상당적으로 많은 디젤차량에 사용되고, 요소를 수용액 형태로 배기 가스라인에 공급하여 NOx와 NH2-CO-NH2 (요소;Urea)를 반응시켜 NOx를 N2 와 O2 로 변환시킴으로써 NOx를 제거한다.The Urea-SCR systems, the amount of generation of the NOx harmful substances corresponds typically used in many diesel vehicles compared to the gasoline engine, to supply the components in the form of an aqueous solution in the exhaust gas line, NOx and NH 2 -CO-NH 2 (element; Urea ) to remove the NOx by the NOx by conversion into N 2 and O 2 reaction.

보다 상세하게는, 상기 Urea-SCR 시스템은 엔진의 배기 매니폴드로부터 배기파이프(10a)를 통해 배출되는 배기가스 중의 유해물질을 정화하기 위한 촉매기(11) 와, 배기파이프(10a)에 설치되어 에어공급포트(12)를 통해 유입되는 공기에 의해서 요소를 주입하는 인젝터(13)와, 요소탱크(18) 내의 요소를 인젝터(13)로 공급하는 요소공급펌프(14)와, 촉매기(11) 내의 온도를 측정하는 열전대와, 열전대로부터의 입력신호와 엔진측으로부터의 입력신호를 제공받는 DAS와, DAS에서 제공되는 신호에 의거하여 DAS 및 증폭회로를 거쳐 인젝터에 요소주입 제어신호를 출력하는 CPU로 구성되어 있다.More specifically, the Urea-SCR system is installed in the catalyst 11 and the exhaust pipe 10a for purifying harmful substances in the exhaust gas discharged from the engine exhaust manifold through the exhaust pipe 10a. An injector 13 for injecting urea by air introduced through the air supply port 12, a urea supply pump 14 for supplying urea in the urea tank 18 to the injector 13, and a catalyst 11. Thermocouples for measuring the temperature in the system, a DAS provided with an input signal from the thermocouple and an input signal from the engine side, and an element injection control signal to the injector through the DAS and amplification circuit based on the signals provided from the DAS. It is composed of CPU.

여기서, NOx와 요소의 반응을 원활하게 하기 위해서는 수용액 형태의 요소를 인젝터(13)를 통해 분무하여 미립화 시킨 다음, 배기가스의 NOx와 잘 혼합되도록 하는 것이다.Here, in order to facilitate the reaction between NOx and urea, the urea in the form of an aqueous solution is atomized by injecting through the injector 13, and then mixed well with the NOx of the exhaust gas.

따라서, 본 발명은 상기와 같은 분무성능을 향상시키기 위해 요소가 분무된 곳 후단에 스월생성장치를 장착한 것이다.Therefore, the present invention is equipped with a swirl generator at the rear end of the urea sprayed to improve the spraying performance as described above.

본 발명에 따른 스월생성장치는 압축공기가 충진된 에어탱크(15)와, 공기를 분사하여 스월을 발생시키는 스월발생포트(16)와, 에어탱크(15)와 스월발생포트(16)를 연결하는 에어라인(17)으로 구성되어 있다.The fresh raw growth value according to the present invention connects the compressed air filled air tank 15, the swirl generating port 16 to inject the air to generate a swirl, and the air tank 15 and the swirl generating port 16. It consists of an airline line 17.

상기 스월발생포트(16)는 요소를 분무하는 인젝터(13)와 배기가스의 유해물질을 정화하는 촉매기(11) 사이에 장착되고, 중간 배기파이프(10b)에서 단면적이 확장되는 촉매기(11)의 입구에 일정각도로 경사지게 설치되어 공기가 소용돌이 치는데 효과적이다.The swirl generation port 16 is mounted between an injector 13 for spraying urea and a catalyst 11 for purifying harmful substances in exhaust gas, and a catalyst 11 having a cross-sectional area extending in an intermediate exhaust pipe 10b. It is installed at an inclined angle at the entrance of) and is effective for swirling air.

또한, 상기 스월발생포트(16)는 배기가스와 요소를 잘 희석시키기 위한 것으로서, 인젝터(13)와 연동하여 작동되어야 하므로 상기 CPU의 제어신호를 받게 되 고, 내부에는 솔레노이드 밸브와 같은 개폐수단이 내장되어 있다.In addition, the swirl generation port 16 is for diluting the exhaust gas and the urea well, and should be operated in conjunction with the injector 13 to receive the control signal of the CPU, and the opening and closing means such as a solenoid valve is provided therein. It is built in.

이와 같은 구성에 의한 본 발명에 따른 Urea-SCR 시스템의 작동상태를 설명하면 다음과 같다.Referring to the operating state of the Urea-SCR system according to the present invention by such a configuration as follows.

상기 CPU는 DAS에서 열전대의 온도 데이터 및 엔진측의 rpm 데이터를 가지고 전체 배기가스량 중에서 NOx량을 산출한 산출값을 입력받아 인젝터(13) 및 스월발생포트(16)의 작동을 제어하게 된다.The CPU receives the calculated value obtained by calculating the NOx amount out of the total exhaust gas with the temperature data of the thermocouple and the rpm data of the engine in the DAS to control the operation of the injector 13 and the swirl generation port 16.

이때, 상기 촉매기(11)의 열전대측에서 제공되는 온도 데이터와 엔진측에서 제공되는 rpm 데이터는 DAS(Data Acquisition System)로 입력되고, DAS는 입력된 온도 데이터 및 rpm 데이터를 가지고 전체 배기가스량 중에서 NOx량을 산출한 후, 이때의 산출값을 CPU로 전달한다. At this time, the temperature data provided from the thermocouple side of the catalyst 11 and the rpm data provided from the engine side are input to a DAS (Data Acquisition System), and the DAS has the input temperature data and the rpm data in the total exhaust gas amount. After calculating the NOx amount, the calculated value at this time is transferred to the CPU.

상기 CPU는 입력된 산출값에 의거하여 DAS 및 증폭회로를 거쳐 인젝터(13)에 요소주입 제어신호를 출력하고, 스월발생포트(16)에 스월발생 제어신호를 출력한다. 즉, 상기 증폭회로를 거치면서 증폭된 신호를 인젝터(13) 및 스월발생포트(16)에 제공하여 이를 듀티제어하게 되며, 인젝터(13)는 요소공급펌프(14)를 통해 요소탱크(18)로부터 유입된 요소를 배기파이프(10a)로 주입하게 되고, 스월발생포트(16)는 에어라인(17)을 통해 에어탱크(15)로 부터 유입된 공기를 중간 배기파이프(10b)로 소용돌이 치게 한다. The CPU outputs the element injection control signal to the injector 13 and outputs the swirl generation control signal to the swirl generation port 16 on the basis of the input value. That is, the signal amplified while passing through the amplification circuit is provided to the injector 13 and the swirl generating port 16 to control the duty, and the injector 13 is the urea tank 18 through the urea supply pump 14. The element introduced from the gas is injected into the exhaust pipe 10a, and the swirl generating port 16 swirls the air introduced from the air tank 15 through the air line 17 to the intermediate exhaust pipe 10b. .

이렇게 주입된 요소는 스월발생에 의해 NOx와 용이하게 희석되므로, 반응성을 향상시켜 NOx를 N2 와 O2 로 변환시키게 되며, 촉매기(11)를 거치면서 정화된 배 기가스는 중간 배기파이프(10b)를 통해 소음기로 공급된 다음, 엔드 파이프를 통해 대기 중으로 배출된다.Since the injected urea is easily diluted with NOx by swirl generation, it improves reactivity to convert NOx into N 2 and O 2 , and the exhaust gas purified through the catalyst 11 is an intermediate exhaust pipe 10b. Is fed to the muffler and then discharged into the atmosphere through the end pipe.

이상에서 본 바와 같이, 본 발명에 따른 Urea-SCR 시스템에 의하면, 요소 분무 후 배기가스에 요소가 잘 희석되도록 분무된 곳 후단에 스월생성장치를 설치함으로써, 에어라인을 통해 에어탱크로부터 유입된 공기를 소용돌이(스월;swirl) 치게 하여 배기가스와 요소를 희석시키고, SCR 시스템의 성능을 향상시켜 NOx의 양을 감소시키며, 요소 연비를 증대하여 경제적인 효과를 얻을 수 있다.As described above, according to the Urea-SCR system according to the present invention, by installing a swirl generator at the rear end of the sprayed place so that the urea is well diluted in the exhaust gas after the urea spray, the air introduced from the air tank through the air line Swirl to dilute the exhaust gas and urea, improve the performance of the SCR system, reduce the amount of NOx and increase urea fuel economy to achieve economic benefits.

Claims (3)

요소를 수용액 형태로 배기 가스라인에 공급하여 NOx를 제거하는 Urea-SCR 시스템에 있어서,In the Urea-SCR system for removing NOx by supplying urea to the exhaust gas line in the form of an aqueous solution, 배기가스 중의 유해물질을 정화하기 위한 촉매기(11)와, 배기파이프(10a)에 설치되어 에어공급포트(12)를 통해 유입되는 공기에 의해서 요소를 주입하는 인젝터(13)와, 요소탱크(18) 내의 요소를 인젝터로 공급하는 요소공급펌프(14)로 구성되되, 상기 인젝터에 의해 요소가 분무된 곳 후단에 스월생성장치를 설치하여 배기가스와 요소를 희석시키도록 한 것을 특징으로 하는 Urea-SCR 시스템.A catalyst 11 for purifying harmful substances in the exhaust gas, an injector 13 installed in the exhaust pipe 10a to inject urea by air flowing through the air supply port 12, and an urea tank ( 18) Urea, consisting of a urea supply pump 14 for supplying urea to the injector, a swirl generating device is installed in the rear end where the urea is sprayed by the injector to dilute the exhaust gas and urea -SCR system. 청구항 1에 있어서, 상기 스월생성장치는 에어탱크(15)로부터 에어라인(17)을 거쳐 스월발생포트(16)를 통해 공기를 분사하여 스월(소용돌이)을 발생시키는 것을 특징으로 하는 Urea-SCR 시스템.The Urea-SCR system according to claim 1, wherein the swirl growth value is injected from the air tank 15 through the air line 17 through the swirl generation port 16 to generate a swirl. . 청구항 2에 있어서, 상기 스월발생포트는 배기파이프에서 단면적이 확장되는 촉매기의 입구에 설치되는 것을 특징으로 하는 Urea-SCR 시스템.The Urea-SCR system according to claim 2, wherein the swirl generation port is installed at an inlet of a catalyst having a cross-sectional area extending from an exhaust pipe.
KR1020050100005A 2005-10-24 2005-10-24 Ｕｒｅａ-ＳＣＲ System KR101047402B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020050100005A KR101047402B1 (en) 2005-10-24 2005-10-24 Ｕｒｅａ-ＳＣＲ System

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020050100005A KR101047402B1 (en) 2005-10-24 2005-10-24 Ｕｒｅａ-ＳＣＲ System

Publications (2)

Publication Number Publication Date
KR20070044093A KR20070044093A (en) 2007-04-27
KR101047402B1 true KR101047402B1 (en) 2011-07-08

Family

ID=38178141

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020050100005A KR101047402B1 (en) 2005-10-24 2005-10-24 Ｕｒｅａ-ＳＣＲ System

Country Status (1)

Country Link
KR (1) KR101047402B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100907376B1 (en) * 2007-12-04 2009-07-10 현대자동차주식회사 Swirl Spray Nozzle System for Injector

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040030650A (en) * 2001-06-08 2004-04-09 로베르트 보쉬 게엠베하 Device and method for metering a reductant for eliminating nitrogen oxide from exhaust gases

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040030650A (en) * 2001-06-08 2004-04-09 로베르트 보쉬 게엠베하 Device and method for metering a reductant for eliminating nitrogen oxide from exhaust gases

Also Published As

Publication number Publication date
KR20070044093A (en) 2007-04-27

Similar Documents

Publication Publication Date Title
JP3283868B2 (en) Exhaust gas purification device for diesel engine exhaust gas
US9057312B2 (en) System and apparatus for reducing reductant deposit formation in exhaust aftertreatment systems
KR101251518B1 (en) Dosing module for exhaust after-treatment system of vehicle
US8636970B2 (en) Exhaust purification device and exhaust purification method for diesel engine
US8250859B2 (en) Exhaust emission control device
KR100628666B1 (en) Secondary treatment device for the exhaust gases of an internal combustion engine
US6871490B2 (en) Emissions control system for increasing selective catalytic reduction efficiency
US7984609B2 (en) Exhaust gas post treatment system
CN101839162B (en) Diagnostic systems and methods for selective catalytic reduction (scr) systems based on nox sensor feedback
US7200989B2 (en) Apparatus and method for cleaning exhaust gas from an internal combustion engine
EP2530265B1 (en) Exhaust purification device and exhaust purification method for diesel engine
US10287946B2 (en) Exhaust system and control method of amount of urea supply
CN103402610A (en) Exhaust system having ammonia slip catalyst in EGR circuit
JP2009156071A (en) Exhaust emission control device for internal combustion engine
US20060196169A1 (en) Exhaust gas purification system of an internal combustion engine and method for purifying the exhaust gases thereof
CN103608555A (en) Exhaust temperature control
CN204357536U (en) A kind of exhaust treatment system
KR101047402B1 (en) Ｕｒｅａ-ＳＣＲ System
KR100774717B1 (en) Inducement apparatus for urea mixing of selective catalytic reduction system
KR101636208B1 (en) Power plant with selective catalytic reuction system
KR102264968B1 (en) Selective catalytic reduction system
KR102063677B1 (en) Power plant with selective catalytic reduction system
KR100802730B1 (en) Urea spray atomization device of selective catalytic reduction system
KR102075879B1 (en) Power plant with selective catalytic reduction system
KR101610061B1 (en) Exhaust gas purification system of vehicle

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20140630

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20150630

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20160630

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20180628

Year of fee payment: 8