High-efficient cleaning and maintenance liquid of diesel engine SCR system

A technology of SCR system and cleaning care solution, which is applied in the direction of organic washing composition, detergent composition, detergent compounding agent, etc. It can solve the problems of nozzles not being able to return, economic loss and troubles of users, and improve the energy efficiency of tail gas treatment , Improve the atomization energy efficiency and reduce the cost of use

Inactive Publication Date: 2015-11-11
刘德龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The urea solution contains a small amount of metal ions, which will gradually lead to catalyst poisoning and failure after being used for a certain period of time, eventually causing the SCR system (SCR is the abbreviation of SelectiveCatalyticReduction, a selective catalytic reduction converter, referring to the urea injection control reaction system) to be unable to effectively treat the car exhaust;
[0004] 2. When urea is heated above 200°C, it will polymerize to produce viscous water-insoluble polycyanamide, which will adhere to the nozzle and cause nozzle blockage;
[0005] 3. During the working process of the SCR system, when the nozzle is opened to spray urea solution, the exhaust gas of the vehicle will recoil into the nozzle, producing carbon deposits and other granular dirt. Lo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0028] A diesel engine SCR system high-efficiency cleaning and care solution comprises the following components: a complexing agent, a surfactant, a cosolvent, ammonia water, and the balance is urea.

[0029] The complexing agent is ethylenediaminetetraacetic acid, ethylene glycol bis (2-aminoethyl) tetraacetic acid, sodium ethylenediamine tetramethylene phosphonate, aminotrimethylene phosphonic acid, hydroxyethylidene diphosphonic acid, ethylidene diphosphonic acid, Sodium diaminetetramethylenephosphonate, ethylenediaminetetramethylenephosphonic acid, diethylenetriaminepentamethylenephosphonic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, 2-hydroxyphosphono One of acetic acid, hexamethylene diamine tetramethylene phosphonic acid, polyamino polyether methylene phosphonic acid, bis-1,6 hexamethylene triamine penta methylene phosphonic acid, amino trimethylene phosphonic acid and hydroxy ethylidene diphosphonic acid and combinations thereof.

[0030] The complexing agent is...

Embodiment 1

[0035] Ethylenediaminetetraacetic acid (EDTA) 1%;

[0036] Ethylene glycol bis(2-aminoethyl)tetraacetic acid (EGTA) 1%;

[0037] Hydrolyzed polymaleic anhydride (HPMA) 0.05%;

[0038] Sodium ethylenediamine tetramethylene phosphonate (EDTMPS) 0.01%;

[0039] Sodium dodecylsulfonate (SDS) 0.1%;

[0040] Butanol 10%;

[0041] Glycerol 10%;

[0042] Ammonia 1%;

[0043] Urea 76.84%.

Embodiment 2

[0045] Ethylenediaminetetraacetic acid (EDTA) 10%;

[0046] Ethylene glycol bis(2-aminoethyl)tetraacetic acid (EGTA) 10%;

[0047] Hydrolyzed polymaleic anhydride (HPMA) 0.2%;

[0048] Sodium ethylenediamine tetramethylene phosphonate (EDTMPS) 0.1%;

[0049] Sodium dodecyl sulfate (SDS) 2%;

[0050] Butanol 30%;

[0051] Glycerol 30%;

[0052] Ammonia 5%;

[0053] Urea 12.7%.

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PUM

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Abstract

The invention provides a high-efficient cleaning and maintenance liquid of a diesel engine SCR system. The high-efficient cleaning and maintenance liquid includes the following components: a complexing agent, a surfactant, a cosolvent, ammonia water and the balanced being urea. The high-efficient cleaning and maintenance liquid can prolong the service life of a catalyst, can improve the effect of the catalyst in the SCR system, can improve the efficiency of tail gas treatment and can reduce the use cost of vehicle-use urea.

Description

technical field [0001] The invention relates to a high-efficiency cleaning care liquid for a diesel engine SCR system. Background technique [0002] The following problems will occur during the long-term use of automobile exhaust treatment fluid: [0003] 1. The urea solution contains a small amount of metal ions, which will gradually lead to catalyst poisoning and failure after being used for a certain period of time, eventually causing the SCR system (SCR is the abbreviation of SelectiveCatalyticReduction, a selective catalytic reduction converter, referring to the urea injection control reaction system) to be unable to effectively treat the car exhaust; [0004] 2. When urea is heated above 200°C, it will polymerize to produce viscous water-insoluble polycyanamide, which will adhere to the nozzle and cause nozzle blockage; [0005] 3. During the working process of the SCR system, when the nozzle is opened to spray urea solution, the exhaust gas of the vehicle will recoi...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/79C11D1/22C11D3/60C11D3/36C11D3/33C11D3/43C11D3/37
Inventor 刘德龙
Owner 刘德龙
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