KR100820284B1 - Diesel particulate filter for diesel vehicles having cleaning ball for preventing plugging of diesel oxidation catalyst - Google Patents

Diesel particulate filter for diesel vehicles having cleaning ball for preventing plugging of diesel oxidation catalyst Download PDF

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KR100820284B1
KR100820284B1 KR1020060115893A KR20060115893A KR100820284B1 KR 100820284 B1 KR100820284 B1 KR 100820284B1 KR 1020060115893 A KR1020060115893 A KR 1020060115893A KR 20060115893 A KR20060115893 A KR 20060115893A KR 100820284 B1 KR100820284 B1 KR 100820284B1
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oxidation catalyst
ball
diesel
housing
particulate matter
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KR1020060115893A
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Korean (ko)
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유영환
이진식
정용현
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주식회사 크린어스
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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
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

A diesel particulate filter for a diesel vehicle having a cleaning ball for preventing oxidation catalyst from being blocked is provided to separate particulate matter from being an inlet of a cell by allowing balls to collide with the particulate matter sticking to an entire surface of the oxidation catalyst. A diesel particulate filter for a diesel vehicle having a cleaning ball for preventing oxidation catalyst from being blocked comprises a housing(100). The housing includes the oxidation catalyst(110), a filter(120) and at least one ball(130). The ball is inserted toward the oxidation catalyst such that the ball is in contact with particulate matter blocked by a front cell of the oxidation catalyst to separate the particulate matter from an inlet(102) of the cell. The inlet, through which exhaust gas is flowed into the housing, is formed in the horizontal direction from the front portion of the oxidation catalyst, so that the ball is easily rolled.

Description

산화촉매 막힘방지용 크리닝 볼을 갖는 경유자동차용 매연저감장치{Diesel Particulate Filter for Diesel Vehicles having Cleaning Ball for preventing plugging of Diesel Oxidation Catalyst}Diesel Particulate Filter for Diesel Vehicles having Cleaning Ball for preventing plugging of Diesel Oxidation Catalyst}

도 1은 종래의 매연저감장치를 개략적으로 도시한 도면,1 is a view schematically showing a conventional smoke reduction device;

도 2는 도 1에 도시한 매연저감장치의 산화촉매가 막힌 상태의 사진,2 is a photograph of a state in which an oxidation catalyst of the smoke reduction device illustrated in FIG. 1 is blocked;

도 3은 도 2의 확대 사진,3 is an enlarged photograph of FIG. 2;

도 4는 본 발명의 일실시예인 매연저감장치의 개략적인 도면,4 is a schematic view of a smoke reduction device according to an embodiment of the present invention;

도 5 및 도 6은 본 발명의 다른 실시예인 매연저감장치의 개략적인 도면,5 and 6 is a schematic view of a smoke reduction device that is another embodiment of the present invention,

도 7은 도 4에 도시한 볼의 사진,7 is a photograph of the ball shown in FIG. 4;

도 8은 도 7의 확대 사진,8 is an enlarged photograph of FIG. 7;

도 9는 도 4에 도시한 볼을 매연저감장치에 사용한 결과를 보여주는 사진이다.9 is a photograph showing the results of using the ball shown in Figure 4 in the smoke reduction device.

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

100: 하우징 102, 104, 106: 입구100: housing 102, 104, 106: inlet

108: 출구 110: 산화촉매108: outlet 110: oxidation catalyst

120: 필터 130: 볼120: filter 130: ball

본 발명은 산화촉매 막힘방지용 크리닝 볼을 갖는 경유자동차용 매연저감장치에 관한 것으로, 특히 산화촉매가 배기가스에 포함된 입자상 물질에 의해 막히는 것을 방지함으로써, 산화촉매의 정상적인 기능을 유지하기 위한 것이다.The present invention relates to a soot reduction apparatus for diesel fuel vehicles having a cleaning ball for preventing the oxidation catalyst clogging, and particularly to maintain the normal function of the oxidation catalyst by preventing the oxidation catalyst from being blocked by particulate matter contained in the exhaust gas.

일반적으로 디젤 차량의 배기가스 중에 포함되어 대기로 배출되는 입자상 물질은 설페이트와 고비점 탄화수소와 같은 오염물질을 포함하는 평균 직경 0.3㎛ 정도의 미연소 탄소입자로서, 디젤 엔진 내에서의 연료의 불완전 연소에 기인한다. 이러한 배기가스에서 배출되는 입자상 물질은 시각적 불쾌감과 악취로 체감 대기오염도를 높일 뿐 아니라 천식 및 폐암의 발병원인으로 인체에 유해성이 큰 물질이다.In general, particulate matter contained in exhaust gas of diesel vehicles and released to the atmosphere is unburned carbon particles having an average diameter of about 0.3 μm including pollutants such as sulfate and high boiling hydrocarbons, and incomplete combustion of fuel in diesel engines. Caused by. The particulate matter discharged from the exhaust gas is not only to increase the air pollution degree of bodily sensation due to visual discomfort and odor, but also to cause asthma and lung cancer.

따라서, 디젤 차량에서 배출되는 입자상 물질에 대한 환경규제가 날로 강화되고 있는 추세이나, 아직 만족시킬 만한 경제성 있는 기술이 상용화되지 못하여 매연 저감과 처리에 관한 기술의 개발이 시급한 상황이다.Therefore, environmental regulations on particulate matter emitted from diesel vehicles are being tightened day by day, but economical technologies that are not satisfactory yet have not been commercialized, and development of technologies related to soot reduction and treatment is urgently needed.

현재 입자상 물질에 관한 처리 기술은 다양한 형태로 개발 진행되고 있는 바, 크게 엔진의 연소성능 개선이 나 연료첨가제 사용에 의해 입자상 물질의 배출을 저감시키는 방법과, 배출되는 배기가스를 여과장치 등의 후처리 장치를 사용하여 배출가스 중의 입자상 물질을 제거하여 저감하는 방법으로 나누어 볼 수 있다.Currently, various technologies for processing particulate matter have been developed. The method of reducing particulate matter emissions by improving the combustion performance of the engine or using fuel additives, and exhaust gas discharged from the It can be divided into a method of removing and reducing particulate matter in exhaust gas using a treatment apparatus.

전자에 기술한 연소성능 개선에 의한 입자상 물질 저감 방법은 현재의 엔진기술 수준으로는 환경규제 수준을 충족시킬 정도의 만족스러운 효과를 얻지 못하고 있으며, 연료첨가제의 사용은 경제성 측면과 연료첨가제 성분의 대기 배출에 의한 2차오염 유발 가능성 등의 문제점이 해결해야 할 과제로 남아 있다.The method of reducing particulate matter by the improvement of combustion performance described in the former has not achieved satisfactory effect to meet the environmental regulation level with the current engine technology level, and the use of fuel additives is economical and the atmosphere of the fuel additive component Problems such as the possibility of causing secondary pollution by emission remain a problem to be solved.

한편, 후처리 장치 기술은 배기가스 중의 입자상 물질을 여과하는 기술과, 여과된 입자상 물질을 연소시켜 여과재 고유의 여과성능을 회복시켜주는 재생기술로 구성되는데, 이와 같은 후처리 장치는 입자상 물질의 여과와 재생이 연속적으로 원활히 이루어지지 않으면 엔진의 배기가스 배출 저항의 증가로 의한 과도한 배압 상승으로 엔진의 성능저하를 초래하는 문제점이 있다.On the other hand, the post-treatment device technology is composed of a technology for filtering particulate matter in the exhaust gas and a regeneration technology for recovering the filtering performance inherent in the filter medium by burning the filtered particulate matter. Such a post-treatment device is a filtration of particulate matter. If the regeneration is not smoothly performed continuously, there is a problem that the performance of the engine decreases due to excessive back pressure increase due to an increase in the exhaust emission resistance of the engine.

따라서, 이러한 문제를 발생시키지 않고 입자상 물질의 여과와 재생이 연속적으로 원활히 이루어지는 다양한 방법이 시도되고 있으며, 일반적으로 강제재생방식과 촉매재생방식으로 크게 나눌 수 있다.Therefore, various methods have been tried in which filtration and regeneration of particulate matter are continuously performed smoothly without causing such a problem, and can be generally divided into a forced regeneration method and a catalyst regeneration method.

강제재생방식은 버너나 전기히터를 이용하여 입자상 물질을 강제 연소시켜 여과재를 재생하는 방법이며, 촉매재생방식은 연료에 유기금속 첨가제를 주입하여 여과재를 재생하는 방법으로서 재생성능이 우수하다.The forced regeneration method is a method of regenerating the filter medium by forcibly burning particulate matter using a burner or electric heater, and the catalytic regeneration method is a method of regenerating the filter medium by injecting an organometallic additive into the fuel and has excellent regeneration performance.

이러한 촉매재생방식의 구조체를 개시하고 있는 특허로는 WO 01/12320, 영국 특허 제 9919013.4가 있다. 상기 특허에서는 기존의 CRT시스템 (미국 특허 제 4,902,487호, 일본 특허 제 3,012,249호)의 분리형 시스템을 일체형으로 개조한 기술로서, 배기가스가 유입되는 상류층 채널의 일정구간을 가스 불투과성 산화촉매로 코팅하고 산화촉매의 하부는 가스투과성의 여과필터 영역으로 이루어져 있다.Patents that disclose such catalytic regeneration structures include WO 01/12320 and British Patent No. 9919013.4. In this patent, the separation system of the existing CRT system (U.S. Patent No. 4,902,487 and Japanese Patent No. 3,012,249) is integrally modified, and a certain section of the upstream channel into which exhaust gas is introduced is coated with a gas impermeable oxidation catalyst The lower part of the oxidation catalyst is composed of a gas permeable filtration filter region.

배기가스 중의 일산화질소(NO)가 산화촉매 층에서 이산화질소(NO2)로 산화되 고, 연이어 여과필터 영역에서 배기가스가 통과하면서 디젤 입자상 물질을 포집하는 필터가 개시되어 있다. 이때 상류층의 코팅된 산화촉매에서 생성된 NO2를 포집된 입자상 물질과 반응시켜 400℃ 이하의 온도에서 연소시킴으로써 디젤 배기가스의 입자상 물질을 제거하는 방법을 제안하고 있다.A filter is disclosed in which nitrogen monoxide (NO) in exhaust gas is oxidized to nitrogen dioxide (NO 2 ) in an oxidation catalyst layer and subsequently collects diesel particulate matter as the exhaust gas passes through the filter filter region. In this case, a method of removing particulate matter from diesel exhaust gas by reacting NO 2 generated in the coated oxidation catalyst of the upstream layer with the collected particulate matter and burning at a temperature of 400 ° C. or less is proposed.

그러나, 배기가스의 온도가 낮은 경우 또는 상기와 같은 별도의 강제재생장치가 없는 경우에는 셀벽면에 포집된 매연이 재생되지 않고 지속적으로 쌓이게 되어 필터 막힘 현상이 발생되고 있다.However, when the temperature of the exhaust gas is low or when there is no separate forced regeneration device as described above, soot collected on the cell wall surface is continuously accumulated without regeneration, and thus filter clogging occurs.

도 1은 일반적으로 사용되고 있는 매연저감장치를 개략적으로 도시한 도면이다.1 is a view schematically showing a soot reduction apparatus which is generally used.

경유차용 매연저감장치의 전단부를 형성하는 산화촉매(DOC, Diesel Oxidation Catalyst;10)는 촉매가 담지되는 세라믹 및 메탈 구조체의 제조기술이 발달함에 따라 효율 증대를 위해 그 셀밀도(cell density)를 높여 사용하는 추세에 있다. 셀밀도는 평방인치당 셀의 수로 나타내는데 최근에는 산화촉매(10)용으로 300~400cpsi(Cell per square inch)이상의 것을 많이 사용하고 있다.Diesel Oxidation Catalyst (DOC) 10, which forms the front end of a diesel particulate filter, increases the cell density to increase efficiency as the manufacturing technology of ceramic and metal structures on which catalysts are supported increases. There is a trend to use. The cell density is expressed as the number of cells per square inch. Recently, more than 300 to 400 cpsi (Cell per square inch) is used for the oxidation catalyst 10.

산화촉매(10)의 셀밀도가 높아지면 촉매와 배기가스의 접촉면적이 증대되게 되므로 배기가스의 정화효율은 증대되게 되나, 단위 셀의 유로가 좁아지게 되므로 엔진에서 배출되는 매연 등 입자상물질(Particulate Matter, PM)에 의해 쉽게 막혀 배압을 상승시키고 장기간 사용시 장치 전체가 막혀 연료소모율을 증가시키고 후방에 위치한 필터(20)까지 파손시키는 사례가 많이 발생한다.As the cell density of the oxidation catalyst 10 increases, the contact area between the catalyst and the exhaust gas increases, so the purification efficiency of the exhaust gas increases, but the flow path of the unit cell narrows, so that particulate matter such as smoke emitted from the engine becomes particulate. Matter, PM) is easily clogged to increase the back pressure, and the long-term use of the entire apparatus is clogged to increase the fuel consumption rate and damage to the filter 20 located in the rear occurs.

이 막힘현상은 도 2 및 도 3의 사진과 같이, 산화촉매(10)의 전단면에서부터 시작되어 전단면을 집중적으로 막게 되므로, 이 부분을 청소해주는 기술이 필요하다.This clogging phenomenon starts with the front end surface of the oxidation catalyst 10, as shown in the photo of Fig. 2 and 3, so that the front end surface is intensively blocked, a technique for cleaning this part is necessary.

연료분사방식의 복합재생 매연저감장치의 경우 배기가스의 온도를 상승시키기 위해 인위적으로 경유를 산화촉매(10)의 전단에 분무하게 되는데, 이 때도 분무된 경유 중 반응이 되지 못한 성분이 산화촉매(100)의 전단에 미연탄소성분의 층을 형성하면서 산화촉매(10)의 셀의 입구를 심하게 막게 된다.In the case of the fuel injection type regenerated particulate reduction device, the diesel fuel is artificially sprayed at the front end of the oxidation catalyst 10 in order to raise the temperature of the exhaust gas. The entrance of the cell of the oxidation catalyst 10 is severely blocked while forming a layer of unburned carbon component at the front end of 100).

산화촉매(10)의 막힘을 방지하기 위해 설계자가 셀의 밀도를 낮추어 선정하는 방법 외에는 특별히 개발된 기술이 없다.In order to prevent clogging of the oxidation catalyst 10, there is no technology specially developed except for a method in which the designer lowers the density of the cell.

운행차에 부착되는 매연저감장치의 경우에도 필터(20)부가 막히면 사후에 필터(20)를 탈거하여 압축공기나 히터를 사용하여 축적된 매연을 청소 및 태워 주나, 산화촉매(10)의 막힘에 대해서는 그 심각성이 제대로 인식되지 못하고 그대로 방치하는 경우가 대부분이다.Even in the case of a smoke reduction device attached to a driving vehicle, if the filter 20 is blocked, the filter 20 is removed afterwards to clean and burn the accumulated smoke using compressed air or a heater, or to block the oxidation catalyst 10. In most cases, the seriousness is not properly recognized and is left as it is.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출한 것으로, 본 발명의 목적은 산화촉매가 배기가스에 포함된 입자상 물질에 의해 막히는 것을 방지함으로써, 산화촉매의 정상적인 기능을 유지하기 위한 것이다.The present invention has been made to solve the above problems, an object of the present invention is to maintain the normal function of the oxidation catalyst by preventing the oxidation catalyst is blocked by particulate matter contained in the exhaust gas.

상기와 같은 목적을 달성하기 위한 본 발명은, 하우징의 내부에 산화촉매 및 필터가 설치된 경유자동차용 매연저감장치에 있어서,In the present invention for achieving the above object, in the smoke reduction device for diesel vehicles provided with an oxidation catalyst and a filter inside the housing,

상기 산화촉매의 전방 상기 하우징의 내부에는, 상기 산화촉매의 전면 셀에 막히는 입자상물질과 접촉하여 상기 입자상물질을 상기 셀의 입구로부터 분리시키기 위한 1이상의 볼을 삽입한 것을 특징으로 하는 산화촉매 막힘방지용 크리닝 볼을 갖는 경유자동차용 매연저감장치를 제공한다.In the housing of the front of the oxidation catalyst, one or more balls for preventing the particulate matter from the inlet of the cell in contact with the particulate matter clogged in the front cell of the oxidation catalyst for preventing clogging the oxidation catalyst Provided is a smoke reduction device for diesel vehicles having a cleaning ball.

상기 볼은 다공성의 금속으로 이루어질 수 있다.The ball may be made of a porous metal.

상기 볼은 직경의 크기를 달리하는 여러 개로 구성할 수 있다.The ball may be composed of several pieces having different diameters.

상기 하우징으로 배기가스가 유입되는 입구를 상기 산화촉매의 전방으로부터 측방향으로 형성하거나, 산화촉매의 전방으로부터 편심위치에 형성하여 상기 볼의 구름을 원활하게 할 수 있다.An inlet through which exhaust gas flows into the housing may be formed laterally from the front of the oxidation catalyst, or may be formed at an eccentric position from the front of the oxidation catalyst to smooth the cloud of the ball.

상기 하우징으로 배기가스가 유입되는 입구에 바람개비 형상의 가이드를 설치하여 상기 배기가스의 회전운동을 촉진시킬 수 있다.A vane-shaped guide may be installed at an inlet through which exhaust gas is introduced into the housing to promote rotational movement of the exhaust gas.

이하에서는 본 발명인 매연저감장치의 양호한 실시예를 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the drawings a preferred embodiment of the present invention soot reduction apparatus will be described in detail.

도 4는 본 발명의 일실시예인 매연저감장치의 개략적인 도면, 도 5 및 도 6은 본 발명의 다른 실시예인 매연저감장치의 개략적인 도면이다.4 is a schematic view of a smoke reduction device according to an embodiment of the present invention, and FIGS. 5 and 6 are schematic views of a smoke reduction device according to another embodiment of the present invention.

그리고 도 7은 도 4에 도시한 볼의 사진이고, 도 8은 도 7의 확대 사진이며, 도 9는 도 4에 도시한 볼을 매연저감장치에 사용한 결과를 보여주는 사진이다.7 is a photograph of the ball shown in FIG. 4, FIG. 8 is an enlarged photograph of FIG. 7, and FIG. 9 is a photograph showing the result of using the ball of FIG.

경유자동차용 매연저감장치는, 하우징(100)의 내부에 촉매가 담지된 산화촉매(110)와, 배기가스에 포함된 입자상 물질을 포집하기 위한 필터(120)가 내장된 다.The diesel particulate reduction device for diesel vehicles includes an oxidation catalyst (110) carrying a catalyst in the housing (100), and a filter (120) for collecting particulate matter contained in exhaust gas.

하우징(100)의 전단에는 산화촉매(110)의 전방으로 배기가스가 유입되는 입구(102)가 형성되고, 하우징(100)의 후단에는 필터(120)를 통과한 배기가스를 배출시키기 위한 출구(108)가 형성된다.An inlet 102 through which the exhaust gas flows in front of the oxidation catalyst 110 is formed at the front of the housing 100, and an outlet for discharging the exhaust gas passing through the filter 120 at the rear end of the housing 100. 108 is formed.

산화촉매(110)의 전방 하우징(100)의 내부에는, 산화촉매(110)의 전면 셀에 막히는 입자상물질과 접촉하여 입자상물질을 셀의 입구로부터 분리시키기 위한 다수의 볼(130)을 삽입한다.In the interior of the front housing 100 of the oxidation catalyst 110, a plurality of balls 130 for contacting the particulate matter blocked in the front cell of the oxidation catalyst 110 to separate the particulate matter from the inlet of the cell is inserted.

이러한 볼(130)은 금속제 또는 테프론 등 내열성이 있는 메쉬(Mesh)를 사용하여 구(Sphere)형태로 형성하거나, 링(Ring) 형태의 물질을 다양한 크기(10~50mm)로 만들어 2~10개를 하우징(100)의 전방에 넣어 둔다.The balls 130 are formed in a sphere shape using a heat resistant mesh such as metal or Teflon, or 2 to 10 pieces made of a ring shape material in various sizes (10 to 50 mm). To put in front of the housing (100).

볼(130)은 엔진으로부터 나오는 배기가스의 강한 흐름에 따라 하우징(100)의 내부에서 자유롭게 굴러 다니거나 회전 또는 튕기면서 산화촉매(110)와 접촉하면서 축적된 매연을 제거하고 깨끗한 표면상태를 유지한다.The ball 130 freely rolls, rotates, or bounces inside the housing 100 according to the strong flow of exhaust gas from the engine, and removes the accumulated smoke in contact with the oxidation catalyst 110 and maintains a clean surface state. .

볼(130)의 직경에 따라 하우징(100) 내에서 운동하는 패턴이 다르므로 다양한 사이즈의 볼(130)을 섞어서 넣어 주는 것이 좋으며, 운동을 원활하게 하기 위해 볼(130)의 형상은 완전한 구형이 되게 하고 연결 및 용접부는 최대한 스무스(smooth)하게 제조하여야 한다.Since the movement pattern in the housing 100 is different according to the diameter of the ball 130, it is good to mix and put the balls 130 of various sizes, and in order to facilitate the movement, the shape of the ball 130 is completely spherical. The joints and welds shall be made as smooth as possible.

또한 볼(130)의 굴림운동을 촉진시키고 배기가스의 혼합특성을 향상시키기 위해 하우징의 입구에 바람개비 형상의 가이드를 설치하여 배기가스의 회전운동을 촉진시켜 줌으로써 볼(130)의 운동성을 증대시킬 수 있다.In addition, to promote the rolling motion of the ball 130 and to improve the mixing characteristics of the exhaust gas by installing a pin-shaped guide at the inlet of the housing to promote the rotational movement of the exhaust gas can increase the mobility of the ball 130 have.

그리고 하우징(100)의 입구는 도 4와 같이 산화촉매(110)의 전방의 중심부에 형성한다.And the inlet of the housing 100 is formed in the center of the front of the oxidation catalyst 110 as shown in FIG.

한편 본 발명의 다른 실시예로서, 바람개비 형상 외에도 볼(130)의 회전운동이 잘 일어나게 하기 위하여 배기가스가 유입되는 하우징(100)의 입구(102)의 위치를 변경할 수 있다.Meanwhile, as another embodiment of the present invention, the position of the inlet 102 of the housing 100 into which the exhaust gas is introduced may be changed so that the rotation of the ball 130 occurs in addition to the pinwheel shape.

도 5와 같이 입구(104)를 산화촉매(110)의 전방으로부터 측방향으로 형성하거나, 도 6과 같이 산화촉매(110)의 전방으로부터 편심위치에 형성하여 배기가스의 유입에 의해 볼(130)의 원활하게 구르도록 한다.As shown in FIG. 5, the inlet 104 is formed laterally from the front of the oxidation catalyst 110 or as shown in FIG. 6 in an eccentric position from the front of the oxidation catalyst 110. Let's roll smoothly.

도 4의 경우는 배기가스는 하우징(100) 및 필터(120)의 방향(흐름방향)에 평행하게 유입되고(I-Type), 도 5 및 도 6의 경우는 배기가스가 흐름방향에 직각으로 유입되는 형식(P-Type)이 된다.In the case of FIG. 4, the exhaust gas flows in parallel to the direction (flow direction) of the housing 100 and the filter 120 (I-Type), and in the case of FIGS. 5 and 6, the exhaust gas is perpendicular to the flow direction. It becomes P-Type.

도 5 및 도 6의 경우는 입구(104,106)의 위치를 편심시킴으로써 배기가스의 흐름에 와류를 형성하여 볼(130)의 활발한 회전유동을 얻을 수 있다.In the case of FIGS. 5 and 6, the rotation of the ball 130 can be obtained by forming a vortex in the flow of the exhaust gas by eccentric the positions of the inlets 104 and 106.

도 7은 볼의 사진이고, 도 8은 볼의 확대 사진이다.7 is a photograph of the ball, and FIG. 8 is an enlarged photograph of the ball.

이러한 볼(130)은, 산화촉매(110)의 전방에서 배기가스의 유입에 의해 유동하여 산화촉매(110)의 전면 셀에 접촉하게 된다. 이에 따라 산화촉매(110)의 전면에 달라붙은 입자상 물질에 충돌하여 입자상물질을 셀의 입구로부터 분리시킨다.The ball 130 flows by the inflow of exhaust gas in front of the oxidation catalyst 110 to contact the front cell of the oxidation catalyst 110. Accordingly, the particles collide with the front surface of the oxidation catalyst 110 to separate the particulate material from the inlet of the cell.

도 9는 입자상 물질에 의해 산화촉매(110)의 전면이 막힌 버스용 매연저감장치에 볼(130)을 삽입한 후, 2일이 경과된 시점에서 산화촉매(110)의 상태를 관찰한 사진이다.9 is a photograph of observing the state of the oxidation catalyst 110 at a time point 2 days after the ball 130 is inserted into the bus smoke reduction device for which the entire surface of the oxidation catalyst 110 is blocked by particulate matter. .

본 장치를 제작하여 실제 운행중인 버스의 매연저감장치에 적용한 결과 볼(130)을 넣은지 1일만에 보통 배압이 50% 정도 떨어지며, 표면의 막힘 부위도 70% 이상 청소가 되었다.As a result of manufacturing the device and applying it to the smoke reduction device of the actual bus, the back pressure dropped by about 50% in one day after the ball 130 was inserted, and the blockage of the surface was cleaned by more than 70%.

그리고 5일 후에는 산화촉매(110)의 표면이 깨끗하게 되어 초기 부착 상태와 동일한 조건이 되었다.After 5 days, the surface of the oxidation catalyst 110 was cleaned to be in the same condition as the initial attachment state.

이상에서 설명한 바와 같이 본 발명은, 매연저감장치의 산화촉매의 전방에 볼을 삽입하여 산화촉매의 표면이 배기가스에 포함된 입자상 물질에 의해 막히는 것을 방지함으로써, 산화촉매의 정상적인 기능을 유지할 수 있는 효과가 있다.As described above, the present invention can maintain the normal function of the oxidation catalyst by inserting a ball in front of the oxidation catalyst of the smoke reduction device to prevent the surface of the oxidation catalyst from being blocked by particulate matter contained in the exhaust gas. It works.

이상에서는 본 발명을 특정한 실시예로써 설명하였으나, 본 발명은 상기한 실시예에 한정되지 아니하며, 특허청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형이 가능할 것이다.The present invention has been described above by way of specific embodiments, but the present invention is not limited to the above-described embodiments, and those skilled in the art without departing from the gist of the present invention claimed in the claims. Anyone can make a variety of variations.

Claims (6)

하우징의 내부에 산화촉매 및 필터가 설치된 경유자동차용 매연저감장치에 있어서,In the smoke reduction device for diesel vehicles, in which the oxidation catalyst and the filter are installed inside the housing, 상기 산화촉매의 전방 상기 하우징의 내부에는, 상기 산화촉매의 전면 셀에 막히는 입자상물질과 접촉하여 상기 입자상물질을 상기 셀의 입구로부터 분리시키기 위한 1이상의 볼을 삽입하되,In the interior of the housing in front of the oxidation catalyst, at least one ball for contacting the particulate matter blocked in the front cell of the oxidation catalyst to separate the particulate matter from the inlet of the cell, 상기 하우징으로 배기가스가 유입되는 입구를 상기 산화촉매의 전방으로부터 측방향으로 형성하여 상기 볼의 구름을 원활하게 한 것을 특징으로 하는 산화촉매 막힘방지용 크리닝 볼을 갖는 경유자동차용 매연저감장치.And an inlet through which exhaust gas flows into the housing in a lateral direction from the front of the oxidation catalyst to smooth the cloud of the oxidation catalyst. 하우징의 내부에 산화촉매 및 필터가 설치된 경유자동차용 매연저감장치에 있어서,In the smoke reduction device for diesel vehicles, in which the oxidation catalyst and the filter are installed inside the housing, 상기 산화촉매의 전방 상기 하우징의 내부에는, 상기 산화촉매의 전면 셀에 막히는 입자상물질과 접촉하여 상기 입자상물질을 상기 셀의 입구로부터 분리시키기 위한 1이상의 볼을 삽입하되,In the interior of the housing in front of the oxidation catalyst, at least one ball for contacting the particulate matter blocked in the front cell of the oxidation catalyst to separate the particulate matter from the inlet of the cell, 상기 하우징으로 배기가스가 유입되는 입구를 상기 산화촉매의 전방으로부터 편심위치에 형성하여 상기 볼의 구름을 원활하게 한 것을 특징으로 하는 산화촉매 막힘방지용 크리닝 볼을 갖는 경유자동차용 매연저감장치.An inlet for exhaust gas flows into the housing at an eccentric position from the front of the oxidation catalyst to smooth the cloud of the oxidation catalyst. 청구항 1 또는 청구항 2에 있어서, The method according to claim 1 or 2, 상기 볼은 다공성의 금속으로 이루어진 것을 특징으로 하는 산화촉매 막힘방지용 크리닝 볼을 갖는 경유자동차용 매연저감장치.The ball is a smoke reduction device for diesel vehicles having a cleaning ball for preventing oxidation catalyst clogging, characterized in that made of a porous metal. 청구항 1 또는 청구항 2에 있어서, The method according to claim 1 or 2, 상기 볼은 직경의 크기를 달리하는 여러 개로 이루어진 것을 특징으로 하는 산화촉매 막힘방지용 크리닝 볼을 갖는 경유자동차용 매연저감장치.The ball is a smoke reduction device for diesel vehicles having a cleaning ball for preventing oxidation catalyst clogging, characterized in that consisting of a plurality of different diameters. 청구항 1 또는 청구항 2에 있어서, The method according to claim 1 or 2, 상기 하우징으로 배기가스가 유입되는 입구에 바람개비 형상의 가이드를 설치하여 상기 배기가스의 회전운동을 촉진시키는 것을 특징으로 하는 산화촉매 막힘방지용 크리닝 볼을 갖는 경유자동차용 매연저감장치.And a vane-shaped guide at the inlet through which the exhaust gas flows into the housing to promote rotational movement of the exhaust gas. 삭제delete
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