Composition of urea reducing agent capable of improving atomization effect

A reducing agent and composition technology, applied in air quality improvement, chemical instruments and methods, mechanical equipment, etc., to achieve the effects of improving NOX removal reaction efficiency, improving spray physical and chemical properties, and reducing escape volume

Inactive Publication Date: 2012-04-04
FAW GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The object of the present invention is to provide a composition of urea reducing agent with improved atomization effect, adopt conventional industrial raw materials, solve the problem of the original urea reducing agent surface The problem of high tension can improve the spray atomization effect. The bench test results show that it can improve the NOX removal chemical reaction to a certain extent, and is beneficial to the process of PM removal. It has low cost and no pollution; it has great High reliability and practical value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Choose 25 parts of high-purity urea component A, 15 parts of industrial ethanol component B, 0.002 part of industrial Kasong antiseptic bactericide component C, 0.001 part of industrial fluorescent red dye D component, and 0.001 part of high-purity water component Part E is 59.992 parts; After component A and component E are stirred at 30°C for 10 minutes, add component B, component C, and component D, continue stirring for 10 minutes, and filter under pressure with a filter element with a filtration accuracy of 5 μm, that is It is the mixture of the present invention.

[0028] The above-mentioned components alcohol, water and urea are all colorless liquids, and remain colorless after mixing. In order to facilitate the on-site filling of automobile production and the storage of service stations, it is easy to distinguish from other liquids, and the problem of wrong filling will not occur.

[0029] The effect of embodiment 1 is as shown in table 1.

[0030] F...

Embodiment 2

[0033] Choose 30 parts of high-purity urea component A, 35 parts of industrial ethanol component B, 0.005 part of industrial Kasong antiseptic bactericide component C, 0.003 part of industrial fluorescent blue dye D component, high-purity water Component E is 34.997 parts; after component A and component E are stirred at 40°C for 5 minutes, add component B, component C, and component D, continue stirring for 5 minutes, and use a filter element with a filtration accuracy of 5 μm to filter under pressure. That is the mixture of the present invention.

[0034] The effect of embodiment 2 is shown in table 2.

[0035] Freezing point / ℃ Kinematic viscosity 40℃, mm 2 / s Surface tension at 25°C, mN / m -31 1. 555 35.8

[0036] The test was carried out on a national 3 diesel engine bench with a displacement of 8.6 liters. Under the rated injection volume of the reducing agent, after being processed by the SCR post-processor, NO X Emissions can meet the nat...

Embodiment 3

[0038] Select 25 parts of high-purity urea component A, 15 parts of industrial methanol component B, 0.002 part of industrial Kasong antiseptic bactericide component C, 0.001 part of industrial fluorescent dye D component, and 0.001 part of high-purity water component E is 59.992 parts; after component A and component E are stirred at 30~40°C for 10 minutes, add component B, component C, and component D, continue stirring for 5 minutes, and use a filter element with a filtration accuracy of 5 μm to filter under pressure. That is the mixture of the present invention.

[0039] The effect of embodiment 3 is shown in table 3.

[0040] Freezing point / ℃ Kinematic viscosity 40℃, mm 2 / s Surface tension at 25°C, mN / m -17.5 1.364 46.1

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PUM

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Abstract

The invention relates to a composition of a urea reducing agent capable of improving atomization effect, which is composed of a component A, a component B, a component C, a component D and a component E; and is characterized in that the component A is urea which accounts for 25 parts-30 parts of a mixture, the component B is low molecular alcohols which account for 15 parts-35 parts of the mixture, the component C is an industrial kathan anticorrosion bactericide which accounts for 0.002 parts-0.005 parts of the mixture, the component D is industrial fluorescent dye which accounts for 0.001 parts-0.003 parts of the mixture, and the component E is water which accounts for 34.997 parts-59.992 parts of the mixture. The composition is taken as a vehicle reducing agent which meets the 4 level and more emission standard of the state. Compared with the traditional urea reducing agent, the surface tension of the composition of urea reducing agent is reduced by more than 50%, the spray atomization performance of vehicles can be improved, NOX removal reaction efficiency can be improved, the escape amount of NH3 can be minimized, the process for removing PM can be benefited, the cost is low and the no pollution is generated.

Description

[0001] Technical field: [0002] The invention relates to a composition of a urea reducing agent with improved atomization effect, which is applied to the post-treatment industry of automobile exhaust. [0003] Background technique: [0004] In the next few years, global automobile manufacturers, especially the United States and Europe, will enforce some stricter standards on vehicle nitrogen oxides NOx and particulate PM emissions, such as Euro 5 and Euro 6 emission standards. [0005] Under the pressure of emission regulations, on the one hand, foreign heavy-duty diesel engines for vehicles are constantly upgrading and improving their technology; , DPF (Diesel Particulate Filter) particle trap, DOC (Diesel Oxidation Catalyst) oxidation catalyst, etc. [0006] The essence of SCR technology is to use urea to decompose NH at high temperature 3 , NH as reducing agent 3 and NO in engine exhaust x The reaction is carried out under the combined action of catalyst and temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/94B01D53/56F01N3/24F01N3/20
CPCY02A50/20
Inventor 张克金王丹刘国军李文祥毛亚蓉张苡铭魏晓川崔龙于力娜
Owner FAW GROUP
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