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Cleaning agent for diesel vehicle SCR tail gas post-treatment system

A tail gas post-treatment and cleaning agent technology, applied in the direction of detergent compounding agent, detergent composition, detergent composition solvent, etc., can solve the problems of diesel SCR system and noble metal corrosion, exhaust system damage, environmental pollution, etc.

Inactive Publication Date: 2019-03-08
武汉布朗环境能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a cleaning agent for the SCR exhaust gas post-treatment system of a diesel vehicle, which solves the problem that the existing cleaning agent will corrode the diesel SCR system and precious metals, and cause damage to the entire exhaust emission system and pollute the environment and water issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Production steps:

[0030] a1, first pour 50% 2-methylpentane, 25% dichloromethane, 3% heptane and 7% ethanol into the mixing container successively according to mass percentage and stir and mix for 25 minutes to obtain the organic cleaning solvent, then In the container, add the prepared 7% organic cleaning solvent, 10% surfactant and 0.7% dispersant to 90% deionized water, and stir for 15 minutes;

[0031] a2. After fully mixing 10% surfactant and 0.7% dispersant in S1, then add 1.3% detergent, 0.25% bactericide, and 0.2% defoamer in sequence, stir for 15 minutes, let stand for 4 hours, and separate impurities , and then filtered to obtain cleaning agent A;

[0032] a3. Then, in the container, add 0.7% neutralizer and 0.15% bactericide to 96.5% deionized water, stir for 15 minutes to fully mix, let stand for 4 hours, separate impurities, and then filter to obtain cleaning agent B.

[0033] Steps for usage:

[0034] b1. First, disassemble the SCR catalytic device of...

Embodiment 2

[0038] Production steps:

[0039] a1, first respectively pour 40% 2-methylpentane, 20% dichloromethane, 1% heptane and 5% ethanol into the mixing container according to the mass percentage and stir and mix for 20 minutes to obtain the organic cleaning solvent, and then In the container, add the prepared 5% organic cleaning solvent, 5% surfactant and 0.5% dispersant to 85% deionized water, and stir for 10 minutes;

[0040] a2. After fully mixing 5% surfactant and 0.5% dispersant in S1, add 0.5% detergent, 0.2% bactericide, and 0.1% defoamer in turn, stir for 10 minutes, let stand for 3 hours, and separate impurities , and then filtered to obtain cleaning agent A;

[0041] a3. Then, in the container, add 0.5% neutralizer and 0.1% bactericide to 95% deionized water, stir for 10 minutes to fully mix, let stand for 3 hours, separate impurities, and then filter to obtain cleaning agent B.

[0042] Steps for usage:

[0043] b1. First, disassemble the SCR catalytic device of the dies...

Embodiment 3

[0047] Production steps:

[0048] a1, first respectively pour 60% 2-methylpentane, 30% dichloromethane, 5% heptane and 10% ethanol into the mixing container according to the mass percentage and stir and mix for 30 minutes to obtain the organic cleaning solvent, and then In the container, add the prepared 10% organic cleaning solvent, 15% surfactant and 1% dispersant to 95% deionized water, and stir for 20 minutes;

[0049] a2. After fully mixing 15% surfactant and 1% dispersant in S1, then add 2% detergent, 0.3% bactericide, and 0.3% defoamer in sequence, stir for 20 minutes, let stand for 5 hours, and separate impurities , and then filtered to obtain cleaning agent A;

[0050] a3. Then, in the container, add 1% neutralizer and 0.2% bactericide to 98% deionized water, stir for 20 minutes to fully mix, let stand for 5 hours, separate impurities, and then filter to obtain cleaning agent B.

[0051] Steps for usage:

[0052] b1. First, disassemble the SCR catalytic device of t...

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PUM

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Abstract

The invention discloses a cleaning agent for a diesel vehicle SCR tail gas post-treatment system. The cleaning agent comprises the following raw materials in parts by weight: a cleaning agent A and acleaning agent B, wherein the two cleaning agents are used together according to requirements; the cleaning agent A comprises 5-10% of an organic cleaning solvent, 5-15% of a surfactant and 0.5-1% ofa dispersant according to the mass fraction of 100%. The cleaning agent relates to the technical field of cleaning of automotive exhaust emission devices. The cleaning agent for the diesel vehicle SCRtail gas post-treatment system has a good cleaning effect on the diesel vehicle tail gas treatment SCR system; urea crystals and carbon particles attached to the inside of the SCR tail gas system areseparated from a carrier with the help of the decomposition and stripping effects of the cleaning agent, so that the original effect of the SCR is restored; the cleaning agent has no corrosion on thediesel vehicle SCR system and precious metals, does not cause any damage to the whole tail gas emission system, does not pollute the environment and water sources; and the cleaning effect of the cleaning agent can be greatly enhanced on organic matters, so that the cleaning agent can fully clean residual organic matters after the diesel vehicle tail gas treatment.

Description

technical field [0001] The invention relates to the technical field of cleaning motor vehicle exhaust emission devices, in particular to a cleaning agent for an SCR exhaust aftertreatment system of a diesel vehicle. Background technique [0002] As the problem of air pollution in China has attracted the attention of the whole society, the regulations on after-treatment emissions from motor vehicles have become more and more stringent. Since January 1, 2017, the national five-standard emission regulations have been implemented nationwide. By July 1, 2019, the National Sixth Standard will also be implemented step by step. Selective Catalytic Reduction (SCR) technology is a basic equipment for diesel vehicle after-treatment systems in the later stage. It is a treatment process for NOx in diesel vehicle exhaust emissions. Under the action of the catalyst, the injected urea for vehicles undergoes hydrolysis and pyrolysis reactions at high temperatures to generate NH3, and uses NH...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D1/72C11D1/83C11D3/04C11D3/10C11D3/18C11D3/20C11D3/24C11D3/30C11D3/34C11D3/37C11D3/44C11D3/48C11D3/60
CPCC11D1/146C11D1/342C11D1/66C11D1/662C11D1/72C11D1/83C11D3/044C11D3/10C11D3/181C11D3/182C11D3/201C11D3/2068C11D3/2082C11D3/2086C11D3/2093C11D3/24C11D3/30C11D3/349C11D3/3707C11D3/373C11D3/43C11D3/48
Inventor 陶茂钢高军
Owner 武汉布朗环境能源有限公司
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