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Selective reduction reaction system

A reaction system and selective technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of high cost and low reduction and conversion efficiency, and achieve the effect of low cost, low failure rate, and prevention of theft

Inactive Publication Date: 2012-10-24
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the selective reduction reaction system of the existing structure has the defects of low reduction conversion efficiency and high cost.

Method used

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  • Selective reduction reaction system

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Embodiment Construction

[0018] Such as figure 1 As shown, the selective reduction reaction system of the present invention includes a urea tank 1, a urea pump 2, a urea nozzle 3, an SCR catalytic converter 4 installed sequentially through pipelines, an engine control unit 5, an engine exhaust pipe 6, a control Unit 7, wherein the engine exhaust pipe 6 is installed on the pipeline between the urea nozzle 3 and the SCR catalytic converter 4, the urea pump 2 is driven by a DC motor 8, and the DC motor 8 is controlled by the control unit 7, and the control unit 7 and the The engine control units 5 communicate through CAN in real time. The urea tank 1 is equipped with a urea temperature sensor 9 and a urea liquid level sensor 10 connected to the control unit 7 . Exhaust gas temperature sensor 11, nitrogen oxide sensor 12.

[0019] Wherein, the urea pump 2 has a filter 13 and a heating blanket, and the filter 13 is a two-stage filter. The urea nozzle 3 is an atomizing nozzle with an orifice shape...

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Abstract

The invention discloses a selective reduction reaction system, and belongs to the technical field of tail gas purifying systems of diesel engines for vehicles. The selective reduction reaction system comprises a urea box, a urea pump, a urea nozzle, an SCR (selective catalytic reduction) catalytic converter, an engine control unit, an engine waste gas exhaust tube and a control unit, wherein the urea box, the urea pump, the urea nozzle and the SCR catalytic converter are sequentially mounted through a pipeline; the engine waste gas exhaust tube is mounted on the pipeline between the urea nozzle and the SCR catalytic converter; the urea pump is driven by a direct-current motor; the direct-current motor is controlled by the control unit; the control unit is communicated with the engine control unit through a CAN (controller area network) in real time; the urea box is provided with a urea temperature sensor and a urea liquid level sensor which are connected with the control unit; and a waste gas temperature sensor and a nitrogen oxide sensor which are connected with the control unit are mounted at an output end of the SCR catalytic converter. The selective reduction reaction system is high in reduction conversion efficiency and low in cost.

Description

technical field [0001] The invention discloses a selective reduction reaction system, which belongs to the technical field of vehicle diesel exhaust purification systems. Background technique [0002] SCR (Selective Catalytic Reduction) selective reduction reaction system is a kind of liquid urea solution injected into the exhaust gas of vehicle diesel engine, and evaporated into ammonia gas and nitrogen oxide NOx discharged from diesel engine in the high-temperature exhaust gas. Under the action of a catalyst, a reduction reaction occurs, thereby greatly reducing the NOx value until it meets the requirements of emission regulations. However, the selective reduction reaction system of the existing structure has the defects of low reduction conversion efficiency and high cost. Contents of the invention [0003] The purpose of the present invention is to provide a selective reduction reaction system with high reduction conversion efficiency and low cost. [0004] In order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N3/28F01N3/035
CPCY02T10/24Y02A50/20Y02T10/12
Inventor 张新华张若煜
Owner SHAOXING UNIVERSITY
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