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Diesel engine aftertreatment anti-crystallization heating mixing device

A technology of heating, mixing and post-treatment, which is applied to the electric control of exhaust treatment devices, exhaust devices, exhaust treatment, etc. It can solve the problems of reducing conversion efficiency and affecting catalytic reactions, so as to improve uniformity and promote urea heating. The effect of decomposing hydrolysis and improving the catalytic conversion efficiency of NOX

Inactive Publication Date: 2017-03-01
上海新动力汽车科技股份有限公司
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Problems solved by technology

However, since the nozzle holes on the nozzle are distributed in the circumferential direction, the jetting direction of the airflow is perpendicular to the wall surface. When the exhaust temperature is low, the ammonia in the urea is easy to crystallize on the inner wall of the exhaust pipe, which affects the catalytic reaction and reduces the NO X Conversion efficiency

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  • Diesel engine aftertreatment anti-crystallization heating mixing device

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Embodiment Construction

[0008] The present invention will be further described in detail according to accompanying drawing 1 below.

[0009] As shown in Figure 1, a diesel engine post-treatment heating and mixing device includes a temperature sensor 1, a relay 2, a power supply 4, a resistance wire 7, a switch 3, a resistance heating cylinder 6, a mixer 5 and a urea injection nozzle 8, and a resistance wire 7 Fixedly installed on the inner wall circumference of the resistance heating cylinder 6, the temperature sensor 1 is connected to the relay 2, the switch 3, the power supply 4, the resistance wire 7 and the relay 2 are connected in series, the resistance heating cylinder 6 is connected to the mixer 5 and located at the urea injection nozzle 8 within the spray area. Among them, when the switch 3 is closed, the temperature sensor 1, the relay 2, the power supply 4, and the resistance wire 7 form a closed circuit. When the exhaust gas temperature is higher than the set low temperature, the relay 2 i...

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Abstract

The invention discloses a diesel engine aftertreatment anti-crystallization heating mixing device. The device comprises a temperature sensor (1), a relay (2), a power supply (4), a resistance wire (7), a switch (3), a resistance heating cylinder (6), a mixer (5) and a urea spraying nozzle (8); the resistance wire (7) is fixedly mounted on the inner wall periphery of the resistance heating cylinder (6); the temperature sensor (1) is connected with the relay (2); the switch (3), the power supply (4), the resistance wire (7) and the relay (2) are serially connected; and the resistance heating cylinder (6) is connected with the mixer (5), and is positioned in a spraying area of the urea spraying nozzle (8). The device is low in exhaust back pressure, simple and compact in structure and convenient for installation, and can be widely applied to a diesel engine exhaust pipeline with a SCR system.

Description

technical field [0001] The invention relates to a diesel engine aftertreatment heating device. Background technique [0002] At present, in the exhaust emission system of a diesel engine with an SCR system, a mixer is usually installed after the urea injection nozzle of the catalytic converter in the exhaust pipeline to improve the airflow disturbance and promote the uniformity of the urea flow. However, since the nozzle holes on the nozzle are distributed in the circumferential direction, the jetting direction of the airflow is perpendicular to the wall surface. When the exhaust temperature is low, the ammonia in the urea is easy to crystallize on the inner wall of the exhaust pipe, which affects the catalytic reaction and reduces the NO X Conversion efficiency. Contents of the invention [0003] The invention provides a diesel engine post-treatment anti-crystallization heating and mixing device, which heats the urea injection area, promotes the sufficient mixing of amm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28F01N3/20F01N9/00
CPCY02T10/12Y02T10/40
Inventor 焦运景纪晓静封煜夏秀娟
Owner 上海新动力汽车科技股份有限公司
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