RU2002106740A - Device for reducing the content of nitrogen oxides in the exhaust gases of an internal combustion engine - Google Patents

Device for reducing the content of nitrogen oxides in the exhaust gases of an internal combustion engine

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Publication number
RU2002106740A
RU2002106740A RU2002106740/12A RU2002106740A RU2002106740A RU 2002106740 A RU2002106740 A RU 2002106740A RU 2002106740/12 A RU2002106740/12 A RU 2002106740/12A RU 2002106740 A RU2002106740 A RU 2002106740A RU 2002106740 A RU2002106740 A RU 2002106740A
Authority
RU
Russia
Prior art keywords
diffuser
mixer
channels
flow
exhaust gas
Prior art date
Application number
RU2002106740/12A
Other languages
Russian (ru)
Other versions
RU2219987C2 (en
Inventor
ХОДГЗОН Ян
Original Assignee
Эмитек Гезельшафт Фюр Эмиссионстехнологи Мбх
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
Priority claimed from DE19938854A external-priority patent/DE19938854C5/en
Application filed by Эмитек Гезельшафт Фюр Эмиссионстехнологи Мбх filed Critical Эмитек Гезельшафт Фюр Эмиссионстехнологи Мбх
Publication of RU2002106740A publication Critical patent/RU2002106740A/en
Application granted granted Critical
Publication of RU2219987C2 publication Critical patent/RU2219987C2/en

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Claims (10)

1. Устройство для каталитического восстановления оксидов азота (NOx), содержащихся в отработавших газах (ОГ) двигателя внутреннего сгорания, имеющее выпускной трубопровод (1) для ОГ, соединяемый одним концом, по меньшей мере, с одним выпускным отверстием для ОГ указанного двигателя внутреннего сгорания, подводящую систему (3), позволяющую подавать в выпускной трубопровод (1) восстановитель, прежде всего мочевину,, по меньшей мере, один смеситель (2), который расположен по ходу потока ОГ за точкой подачи восстановителя в выпускной трубопровод (1) и который имеет множество проточных каналов (9, 9а, 9b) для прохождения текучей среды, и, по меньшей мере, один каталитический нейтрализатор (7), установленный, по меньшей мере, за одним смесителем (2), отличающееся тем, что между смесителем (2) и нейтрализатором (7) предусмотрен, по меньшей мере, один диффузор (6), имеющий множество проточных каналов (21) для прохождения потока ОГ с увеличивающимся в направлении потока поперечным сечением, при этом форма поперечного сечения отдельных каналов (21) на входе (22) диффузора (6) практически соответствует форме поперечного сечения отдельных каналов на выходе смесителя (2).1. A device for the catalytic reduction of nitrogen oxides (NO x ) contained in the exhaust gas (OG) of an internal combustion engine having an exhaust pipe (1) for exhaust gas connected at one end to at least one exhaust outlet for exhaust gas of said internal engine combustion, the supply system (3), which allows to supply a reducing agent, in particular urea, to the exhaust pipe (1), at least one mixer (2), which is located along the exhaust gas flow behind the supply point of the reducing agent to the exhaust pipe (1) which has many flow channels (9, 9a, 9b) for the passage of fluid, and at least one catalytic converter (7) installed at least one mixer (2), characterized in that between the mixer ( 2) and a catalyst (7), at least one diffuser (6) is provided having a plurality of flow channels (21) for passing the exhaust gas flow with a cross section increasing in the direction of flow, the cross-sectional shape of individual channels (21) at the input (22) of the diffuser (6) practically corresponds to the shape n cross section of individual channels at the outlet of the mixer (2). 2. Устройство по п.1, отличающееся тем, что живое сечение потока на входе (22) диффузора (6), по меньшей мере, равно живому сечению потока на выходе смесителя (2).2. The device according to claim 1, characterized in that the living cross-section of the flow at the inlet (22) of the diffuser (6) is at least equal to the living cross-section of the flow at the outlet of the mixer (2). 3. Устройство по п.2, отличающееся тем, что плотность расположения каналов на входе (22) диффузора (6) соответствует плотности расположения каналов в смесителе(2).3. The device according to claim 2, characterized in that the density of the channels at the input (22) of the diffuser (6) corresponds to the density of the channels in the mixer (2). 4. Устройство по п.1, отличающееся тем, что, по меньшей мере, часть отдельных каналов (21) на входе (22) диффузора (6) расположена соосно с частью отдельных каналов на выходе смесителя (2).4. The device according to claim 1, characterized in that at least part of the individual channels (21) at the inlet (22) of the diffuser (6) is aligned with part of the individual channels at the outlet of the mixer (2). 5. Устройство по любому из пп.1-4, отличающееся тем, что диффузор (6) образован кожухом (17) и, по меньшей мере, одним пакетом (18), набранным из гладких и гофрированных металлических листов (19, 20).5. A device according to any one of claims 1 to 4, characterized in that the diffuser (6) is formed by a casing (17) and at least one packet (18) composed of smooth and corrugated metal sheets (19, 20). 6. Устройство по любому из пп.1-5, отличающееся тем, что, по меньшей мере, часть каналов (21) диффузора (6) гидродинамически сообщается между собой.6. A device according to any one of claims 1 to 5, characterized in that at least a portion of the channels (21) of the diffuser (6) are hydrodynamically interconnected. 7. Устройство по п.6, отличающееся тем, что каналы (21) ограничены стенками, при этом, по меньшей мере, часть этих стенок каналов снабжена отверстиями (30, 32, 34) и, по меньшей мере, часть отверстий (30, 32) снабжена направляющими поверхностями (29, 35, 36), расположенными наклонно к стенке канала.7. The device according to claim 6, characterized in that the channels (21) are limited by the walls, while at least part of these channel walls is provided with holes (30, 32, 34) and at least a part of the holes (30, 32) is equipped with guide surfaces (29, 35, 36) located obliquely to the channel wall. 8. Устройство по п.6 или 7, отличающееся тем, что гладкие металлические листы (19), по меньшей мере, частично выполнены сетчатыми.8. The device according to claim 6 or 7, characterized in that the smooth metal sheets (19) are at least partially mesh-like. 9. Устройство по п.8, отличающееся тем, что гладкие металлические листы (19) выполнены из растянутых перфорированных металлических листов.9. The device according to claim 8, characterized in that the smooth metal sheets (19) are made of stretched perforated metal sheets. 10. Устройство по любому из пп.1-9, отличающееся тем, что диффузор (6) расположен практически непосредственно за смесителем (2).10. The device according to any one of claims 1 to 9, characterized in that the diffuser (6) is located almost directly behind the mixer (2).
RU2002106740/15A 1999-08-17 2000-08-11 Device for reducing content of nitric oxides in exhaust gases of internal combustion engines RU2219987C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19938854A DE19938854C5 (en) 1999-08-17 1999-08-17 Device for reducing the nitrogen oxide content in an exhaust gas of an internal combustion engine
DE19938854.7 1999-08-17

Publications (2)

Publication Number Publication Date
RU2002106740A true RU2002106740A (en) 2003-09-27
RU2219987C2 RU2219987C2 (en) 2003-12-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
RU2002106740/15A RU2219987C2 (en) 1999-08-17 2000-08-11 Device for reducing content of nitric oxides in exhaust gases of internal combustion engines

Country Status (11)

Country Link
US (1) US6516610B2 (en)
EP (1) EP1204459B1 (en)
JP (1) JP2003507612A (en)
CN (1) CN1170617C (en)
AU (1) AU6701500A (en)
DE (2) DE19938854C5 (en)
ES (1) ES2208402T3 (en)
MY (1) MY127016A (en)
RU (1) RU2219987C2 (en)
TW (1) TW550332B (en)
WO (1) WO2001012301A1 (en)

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