KR20060130956A - Liquid injection apparauts for an exhaust gas purifier of a desel engine and method thereof - Google Patents

Liquid injection apparauts for an exhaust gas purifier of a desel engine and method thereof Download PDF

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Publication number
KR20060130956A
KR20060130956A KR1020050050706A KR20050050706A KR20060130956A KR 20060130956 A KR20060130956 A KR 20060130956A KR 1020050050706 A KR1020050050706 A KR 1020050050706A KR 20050050706 A KR20050050706 A KR 20050050706A KR 20060130956 A KR20060130956 A KR 20060130956A
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South Korea
Prior art keywords
liquid
nozzle
exhaust gas
urea
valve
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KR1020050050706A
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Korean (ko)
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최중모
유영환
조재득
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현대모비스 주식회사
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Priority to KR1020050050706A priority Critical patent/KR20060130956A/en
Publication of KR20060130956A publication Critical patent/KR20060130956A/en

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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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
    • 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/02—Exhaust filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
    • F01N2260/024—Exhaust treating devices having provisions not otherwise provided for for cooling the device using a liquid
    • 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
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • 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

Abstract

A liquid injection apparatus for an exhaust gas purifier for a diesel engine and a method thereof are provided to stabilize and improve liquid injection performance by preventing variation of sizes of particles of liquid caused due to clogging of a nozzle or worn-out of the nozzle. A liquid injection apparatus comprises a nozzle(1) for injecting hydro carbon or urea in liquid streams; a wall surface(3) vertically arranged at the side opposite to the nozzle; a liquid pump(5) for pumping the hydro carbon or urea to the nozzle; a liquid valve(7) for controlling the flow of the liquid supplied to the nozzle from the liquid pump; and a controller(9) for controlling the liquid valve. Alternatively, the liquid injection apparatus further includes an air valve interposed between the liquid pump and the liquid valve so as to permit compressed air to flow into the hydro carbon or urea; and a compression air source for supplying compressed air to the air valve.

Description

디젤엔진 배기가스 정화장치용 액체 분사장치 및 방법{LIQUID INJECTION APPARAUTS FOR AN EXHAUST GAS PURIFIER OF A DESEL ENGINE AND METHOD THEREOF}LIQUID INJECTION APPARAUTS FOR AN EXHAUST GAS PURIFIER OF A DESEL ENGINE AND METHOD THEREOF}

도 1은 본 발명에 따른 디젤엔진의 배기가스 정화장치용 액체 분사장치를 도시한 도면,1 is a view showing a liquid injector for exhaust gas purification device of a diesel engine according to the present invention,

도 2는 본 발명의 다른 실시예를 도시한 도면,2 is a view showing another embodiment of the present invention;

도 3은 본 발명의 또 다른 실시예를 도시한 도면,3 is a view showing another embodiment of the present invention;

도 4는 본 발명의 작용 및 본 발명에 따른 분사방법을 설명한 도면이다.4 is a view for explaining the operation of the present invention and the injection method according to the present invention.

<도면의 주요 부분에 대한 부호의 간단한 설명><Brief description of symbols for the main parts of the drawings>

1; 노즐 3; 벽면One; Nozzle 3; Wall panel

5; 액체펌프 7; 액체밸브5; Liquid pump 7; Liquid valve

9; 컨트롤러 11; 공기밸브9; Controller 11; Air valve

13; 필터 15; 공압펌프13; Filter 15; Pneumatic pump

17; 산란판 17; Scattering plate

본 발명은 디젤엔진의 배기가스 정화장치용 액체 분사장치 및 방법에 관한 것으로서, 보다 상세하게는 탄화수소(HC: Hydro Carbon)나 요소(Urea)를 분사하는 기술에 관한 것이다.The present invention relates to a liquid injector and method for an exhaust gas purification device of a diesel engine, and more particularly, to a technology for injecting hydrocarbon (HC) or urea (Urea).

디젤엔진에서 배출되는 물질 중에는 질소산화물(NOx)과 매연(PM: Particulate Matter)이 있으며, 이를 제거하기 위해 촉매를 이용한 화학반응이 많이 응용되고 있으며, 주로 질소산화물과 매연을 모두 제거하기 위한 매연저감장치 등에는 탄화수소를 분사하고, 질소산화물을 주로 제거하기 위한 질소산화물저감장치에는 요소를 분사한다.Among the materials discharged from diesel engines, NOx and Particulate Matter (PM) are used, and chemical reactions using catalysts are widely applied to remove them, and mainly smoke reduction to remove both NOx and soot. Hydrocarbons are injected into the apparatus and urea is injected into the nitrogen oxide reduction apparatus for mainly removing nitrogen oxides.

종래에 상기와 같은 탄화수소 또는 요소는 상기 매연저감장치나 질소산화물저감장치 또는 배기관에 고압의 노즐을 이용하여 직접 안개 형태로 분사하는 기술이 사용되고 있다.Conventionally, such a hydrocarbon or urea has been used to directly inject a mist into the smoke reduction device, the nitrogen oxide reduction device or the exhaust pipe using a high pressure nozzle.

상기와 같이 고압노즐을 사용하여 직접 안개상태로 분사하는 기술은 고압노즐의 막힘이나 고압노즐의 노후화에 따른 액체입자 크기의 불량 등의 문제점을 가지고 있다.As described above, a technique of directly spraying a high pressure nozzle using a high pressure nozzle has problems such as clogging of the high pressure nozzle and poor particle size due to aging of the high pressure nozzle.

본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 노즐의 막힘이나 노즐의 노후화에 따른 액체입자 크기의 변화 등의 문제점을 근본적으로 해결하여, 항상 안정된 액체 분사 성능을 확보하여, 디젤엔진의 배기가스 정화성능을 안정적으로 유지시킬 수 있도록 한 디젤엔진 배기가스 정화장치용 액체 분사장치 및 방법을 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, fundamentally solve the problems such as clogging of the nozzle or change of the liquid particle size due to aging of the nozzle, to ensure a stable liquid injection performance, diesel engine It is an object of the present invention to provide a liquid injector and method for a diesel engine exhaust gas purifying apparatus capable of stably maintaining the exhaust gas purifying performance of the fuel cell.

상기한 바와 같은 목적을 달성하기 위한 본 발명 디젤엔진 배기가스 정화장치용 액체 분사장치는 Liquid injection device for a diesel engine exhaust gas purification device of the present invention for achieving the above object is

탄화수소 또는 요소 액체를 일련의 액상줄기상태로 분출시키는 노즐과;A nozzle for ejecting hydrocarbon or urea liquid into a series of liquid phase stems;

상기 노즐의 맞은편에 수직하게 위치한 벽면과;A wall surface perpendicularly opposite the nozzle;

상기 노즐에 상기 탄화수소 또는 요소 액체를 펌핑하는 액체펌프와;A liquid pump for pumping the hydrocarbon or urea liquid into the nozzle;

상기 액체펌프로부터 상기 노즐로 공급되는 상기 액체의 흐름을 단속하는 액체밸브와;A liquid valve for regulating the flow of the liquid supplied from the liquid pump to the nozzle;

상기 액체밸브를 제어하는 컨트롤러;A controller for controlling the liquid valve;

를 포함하여 구성된 것을 특징으로 한다.Characterized in that configured to include.

또한, 본 발명에 따른 디젤엔진 배기가스 정화장치용 액체 분사방법은 In addition, the liquid injection method for a diesel engine exhaust gas purifying apparatus according to the present invention

고압으로 공급된 탄화수소 또는 요소 액체를 일련의 액상줄기상태로 분출시키고;Ejecting the hydrocarbon or urea liquid supplied at high pressure into a series of liquid phase stems;

상기 분출된 일련의 액상줄기상태의 액체를 벽면에 부딪히게 하여 입자화시키는 것을 특징으로 한다.Characterized in that the jetted liquid in the state of the liquid state of the state of the liquid to hit the wall surface.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

도 1을 참조하면, 본 발명 실시예는 탄화수소 또는 요소 액체를 일련의 액 상줄기상태로 분출시키는 노즐(1)과; 상기 노즐(1)의 맞은편에 수직하게 위치한 벽면(3)과; 상기 노즐(1)에 상기 탄화수소 또는 요소 액체를 펌핑하는 액체펌프(5)와; 상기 액체펌프(5)로부터 상기 노즐(1)로 공급되는 상기 액체의 흐름을 단속하는 액체밸브(7)와; 상기 액체밸브(7)를 제어하는 컨트롤러(9)를 포함하여 구성된다.1, an embodiment of the present invention includes a nozzle (1) for ejecting a hydrocarbon or urea liquid in a series of liquid phase stem state; A wall surface (3) located vertically opposite the nozzle (1); A liquid pump (5) for pumping the hydrocarbon or urea liquid to the nozzle (1); A liquid valve (7) for controlling the flow of the liquid supplied from the liquid pump (5) to the nozzle (1); And a controller 9 for controlling the liquid valve 7.

상기 탄화수소는 실제 차량에서는 디젤엔진의 연료로 사용되는 경유가 될 수 있는 바, 디젤엔진의 연료리턴라인으로부터 상기 탄화수소를 상기 노즐(1)에 공급할 수도 있다.The hydrocarbon may be light oil used as a fuel of a diesel engine in an actual vehicle, and the hydrocarbon may be supplied to the nozzle 1 from a fuel return line of the diesel engine.

이 경우 상기 액체펌프(5)는 디젤엔진의 연료펌프에 해당한다고 할 수 있을 것이다.In this case, the liquid pump 5 may be said to correspond to the fuel pump of the diesel engine.

상기 요소를 분사하는 경우에는 별도로 요소를 저장하는 탱크를 차량 등에 구비하여야 함은 물론이다.In the case of spraying the urea, of course, a tank for storing the urea should be provided.

상기 노즐(1)의 맞은편에 위치한 벽면(3)은 구체적으로는, 매연저감장치의 내부 벽면이나, 질소산화물저감장치의 내부 벽면, 또는 배기관의 내부 벽면에 해당한다.The wall surface 3 located opposite the nozzle 1 specifically corresponds to the inner wall surface of the smoke reduction device, the inner wall surface of the nitrogen oxide reduction device, or the inner wall surface of the exhaust pipe.

즉, 상기 벽면(3)은 배기가스가 통과하는 관로에 상당하는 용기의 내부 벽면에 해당한다고 할 수 있을 것이다.That is, the wall surface 3 may correspond to the inner wall surface of the container corresponding to the pipeline through which the exhaust gas passes.

도 2에는 본 발명의 다른 실시예가 개시되어 있는바, 상기 액체펌프(5)와 상기 액체밸브(7) 사이에 상기 탄화수소 또는 요소 액체에 압축공기를 유입시킬 수 있도록 설치된 공기밸브(11)와, 상기 공기밸브(11)에 압축공기를 제공하는 압축공기원이 더 구비되어 있다.2 shows another embodiment of the present invention, an air valve 11 installed between the liquid pump 5 and the liquid valve 7 to introduce compressed air into the hydrocarbon or urea liquid, A compressed air source for providing compressed air to the air valve 11 is further provided.

상기 압축공기원으로는 도시된 바와 같이 필터(13)를 구비한 별도의 공압펌프(15)가 사용될 수도 있으나 디젤차량과 같은 경우 차량에 자체적으로 구비된 공압탱크 등이 사용될 수도 있다.As the compressed air source, as shown, a separate pneumatic pump 15 having a filter 13 may be used, but in the case of a diesel vehicle, a pneumatic tank may be used.

상기한 바와 같이 탄화수소 또는 요소 액체에 압축공기를 첨가하여 분출시키게 되면 보다 미세한 액체입자를 얻을 수 있다.As described above, when compressed air is added to the hydrocarbon or the urea liquid to be ejected, finer liquid particles can be obtained.

도 3에는 본 발명의 또 다른 실시예로서, 상기 노즐(1)의 맞은편에 다수의 요철이 구비된 산란판(17)이 구비된 것이 개시되어 있다.In FIG. 3, as another embodiment of the present invention, a scattering plate 17 having a plurality of irregularities is provided on the opposite side of the nozzle 1.

상기 산란판(17)은 물론 상기 벽면(3)에 별도의 부품으로 고정되거나 벽면(3) 자체에 다수의 요철이 형성되는 형태로도 구현될 수 있다.The scattering plate 17 may, of course, be fixed to the wall surface 3 as a separate component or may be implemented in a form in which a plurality of irregularities are formed on the wall surface 3 itself.

상기 산란판(17)의 다수의 요철은 상기 노즐(1)로부터 분사된 액체줄기를 더욱 용이하게 작은 입자로 입자화시킬 수 있을 것이다.A plurality of irregularities of the scattering plate 17 may more easily granulate the liquid stem injected from the nozzle 1 into small particles.

상기한 바와 같은 본 발명의 작용을 도 4를 참조하여 설명하면 다음과 같다.The operation of the present invention as described above with reference to Figure 4 as follows.

도 4는 노즐(1)에서 분사된 탄화수소 또는 요소 액체가 일련의 액상줄기상태로 분사되어 입자화되는 과정을 시간의 경과 순서에 따라 좌측에서부터 우측으로 설명한 것이다.4 illustrates a process in which the hydrocarbon or urea liquid injected from the nozzle 1 is injected into a series of liquid phase stems and granulated, from left to right in the order of passage of time.

여기서, "일련의 액상줄기상태"라 함은 액체입자들의 군집형태가 아니라 서 로 연결되어 하나의 줄을 이루는 액체 상태를 의미하는 바, 도 4의 (c)를 참조하면 그 의미가 특정될 것이다.Here, "a series of liquid stem state" means a liquid state connected to each other rather than a clustered form of liquid particles to form a row, the meaning will be specified with reference to Figure 4 (c). .

(a)는 액체의 분출이 일어나지 않는 동안의 노즐(1)과 벽면(3)의 배치상태를 도시하고 있으며, (b)는 노즐(1)에서 일련의 액상줄기상태로 탄화수소 또는 요소 액체(X)가 분출되는 것을 표현한다.(a) shows the arrangement of the nozzle (1) and the wall surface (3) while no ejection of liquid occurs, and (b) shows the hydrocarbon or urea liquid (X) in a series of liquid stems in the nozzle (1). ) Represents the eruption.

상기와 같이 분출된 일련의 액상줄기상태의 탄화수소 또는 요소 액체(X)는 (c)와 같은 상태를 거쳐 (d)와 같은 상태로 벽면(3)에 부딪히면서, 그 충돌에너지에 의해 무수한 작은 액체입자로 입자화된다.Hydrocarbon or urea liquid (X) in the liquid phase stem state ejected as described above hits the wall surface 3 in the same state as in (d) through the state as in (c), and countless small liquid particles by the collision energy. To granulate.

물론, 상기 액체입자는 배기가스와 작용하여 배기가스를 정화시키는 화학작용에 사용된다.Of course, the liquid particles are used in a chemical reaction that works with the exhaust gas to purify the exhaust gas.

여기서, 상기 (c)의 상태는 예시에 불과하고, 실질적으로 노즐(1)과 벽면(3) 사이의 거리가 충분히 좁은 경우에는 상기 (c)의 상태를 거치지 않고 바로 (b)의 상태로부터 (d)의 상태에 이를 수도 있다.Here, the state of (c) is merely an example, and in the case where the distance between the nozzle 1 and the wall surface 3 is sufficiently small, the state of (b) is not directly passed from the state of (b) without passing through the state of (c) ( d) may be reached.

참고로, 실험 결과에 의하면, 상기한 바와 같이 노즐(1)에서 직접 액체입자를 분무하지 않고 일련의 액상줄기상태로 액체를 분출하면, 노즐(1)의 막힘 현상이 급격히 감소하고, 입자화된 액체입자의 크기도 종래에 비해 더욱 작게 형성할 수 있다.For reference, according to the experimental results, as described above, when the liquid is ejected in a series of liquid stems without spraying the liquid particles directly from the nozzle 1, the clogging phenomenon of the nozzle 1 is drastically reduced and granulated. The size of the liquid particles can also be made smaller than in the prior art.

이상과 같이 본 발명에 의하면, 노즐의 막힘이나 노즐의 노후화에 따른 액 체입자 크기의 변화 등의 문제점을 근본적으로 해결하고, 노즐로 인해 형성된 액체입자의 크기를 더욱 미세하게 하여, 안정되고 향상된 액체 분사 성능을 확보함으로써, 디젤엔진의 배기가스 정화성능을 안정적으로 유지시킬 수 있도록 한다.As described above, the present invention fundamentally solves problems such as clogging of the nozzle and change of the liquid particle size due to aging of the nozzle, and further refines the size of the liquid particles formed by the nozzle, thereby providing a stable and improved liquid. By ensuring the injection performance, it is possible to maintain a stable exhaust gas purification performance of the diesel engine.

Claims (4)

탄화수소 또는 요소 액체를 일련의 액상줄기상태로 분출시키는 노즐과;A nozzle for ejecting hydrocarbon or urea liquid into a series of liquid phase stems; 상기 노즐의 맞은편에 수직하게 위치한 벽면과;A wall surface perpendicularly opposite the nozzle; 상기 노즐에 상기 탄화수소 또는 요소 액체를 펌핑하는 액체펌프와;A liquid pump for pumping the hydrocarbon or urea liquid into the nozzle; 상기 액체펌프로부터 상기 노즐로 공급되는 상기 액체의 흐름을 단속하는 액체밸브와;A liquid valve for regulating the flow of the liquid supplied from the liquid pump to the nozzle; 상기 액체밸브를 제어하는 컨트롤러;A controller for controlling the liquid valve; 를 포함하여 구성된 것을 특징으로 하는 디젤엔진 배기가스 정화장치용 액체 분사장치.Liquid injection device for a diesel engine exhaust gas purification device, characterized in that configured to include. 제1항에 있어서,The method of claim 1, 상기 액체펌프와 상기 액체밸브 사이에 상기 탄화수소 또는 요소 액체에 압축공기를 유입시킬 수 있도록 설치된 공기밸브와;An air valve installed between the liquid pump and the liquid valve to allow compressed air to flow into the hydrocarbon or urea liquid; 상기 공기밸브에 압축공기를 제공하는 압축공기원;A compressed air source providing compressed air to the air valve; 을 더 포함하여 구성된 것을 특징으로 하는 디젤엔진 배기가스 정화장치용 액체 분사장치.Liquid injection device for a diesel engine exhaust gas purification device, characterized in that further comprises. 제1항 또는 제2항에 있어서,The method according to claim 1 or 2, 상기 노즐의 맞은편에는 다수의 요철이 구비된 산란판이 더 구비된 것Opposite side of the nozzle is further provided with a scattering plate having a plurality of irregularities 을 특징으로 하는 디젤엔진 배기가스 정화장치용 액체 분사장치.Liquid injection device for a diesel engine exhaust gas purification device characterized in that. 고압으로 공급된 탄화수소 또는 요소 액체를 일련의 액상줄기상태로 분출시키고;Ejecting the hydrocarbon or urea liquid supplied at high pressure into a series of liquid phase stems; 상기 분출된 일련의 액상줄기상태의 액체를 벽면에 부딪히게 하여 입자화시키는 것Granulating the ejected series of liquid stems by striking the wall surface 을 특징으로 하는 디젤엔진 배기가스 정화장치용 액체 분사방법.Liquid injection method for a diesel engine exhaust gas purification apparatus, characterized in that.
KR1020050050706A 2005-06-14 2005-06-14 Liquid injection apparauts for an exhaust gas purifier of a desel engine and method thereof KR20060130956A (en)

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