CN111720190A - Particulate matter trapping liquid for diesel vehicle DPF regeneration device and preparation method thereof - Google Patents
Particulate matter trapping liquid for diesel vehicle DPF regeneration device and preparation method thereof Download PDFInfo
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- CN111720190A CN111720190A CN202010373343.8A CN202010373343A CN111720190A CN 111720190 A CN111720190 A CN 111720190A CN 202010373343 A CN202010373343 A CN 202010373343A CN 111720190 A CN111720190 A CN 111720190A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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Abstract
The invention discloses a particulate matter trapping liquid of a diesel vehicle DPF regeneration device and a preparation method thereof, wherein the particulate matter trapping liquid comprises the following components in percentage by mass: 0.1-5% of pH regulator, 0.1-5% of oil stain solubilizer, 1-5% of penetrating agent, 0.1-1% of bactericidal preservative, 0.001-0.1% of foam inhibitor and the balance of water. The preparation method of the particulate matter trapping liquid of the diesel vehicle DPF regeneration device comprises the following steps: dissolving a pH regulator in water, stirring and adding an oil stain solubilizer, a penetrating agent, a sterilizing preservative and a foam inhibitor according to the proportion of the components, and filtering to obtain the particulate matter trapping liquid. The invention can quickly collect the particles carried in the large-flow gas, has high collection efficiency, simple preparation method and low cost.
Description
Technical Field
The invention relates to a particulate matter trapping liquid and a preparation method thereof, in particular to a particulate matter trapping liquid of a diesel vehicle DPF regeneration device and a preparation method thereof.
Background
With the continuous emergence of new diesel vehicle emission laws and regulations, the requirements on the exhaust emission of the diesel vehicle are higher and higher, so that the loading particle trap (DPF) of the domestic diesel vehicle becomes a necessary trend. DPF can gather more than 90% of the soot generated by diesel engine, effectively reduces the emission of particulate matter, and the gathered particulate matter is gathered in the pore channel of DPF, so after DPF runs for a period of time, the exhaust back pressure is increased due to the blocking of particulate matter, when the exhaust back pressure reaches a certain degree, the normal work of the engine can be influenced. At this time, the DPF needs to be regenerated to restore the engine to normal operation. At present, the regeneration of DPF at home and abroad is mainly divided into active regeneration and passive regeneration.
The active regeneration mainly ignites the carbon deposit on the surface of the DPF through oil injection ignition heating or other heating modes, and the method can slow down the DPF blockage to a certain extent. Due to the fact that non-combustible components exist in the DPF blockage, the efficiency is obviously reduced after the DPF blockage is actively regenerated for many times, and the system is frequently regenerated, and at the moment, the DPF can be regenerated only through other methods.
The passive regeneration is mainly to reduce the ignition point of the carbon deposit by adding fuel additive or coating catalyst on the surface of DPF carrier, and to remove the carbon deposit by oxidizing with other oxidation state waste gas in the tail gas. Due to the presence of non-combustible components in the DPF plug, the DPF system can still be plugged after a period of time; the passive regeneration efficiency mainly depends on the catalytic action of the catalyst, when a large amount of carbon deposit is accumulated on the surface of the catalyst, the active sites are reduced, the regeneration efficiency is reduced, the problem that the catalyst cannot be regenerated immediately after being blocked is solved, the blocking phenomenon can be rapidly worsened, and meanwhile, the catalyst is saved and has a certain service life.
At present, the service life of the DPF is prolonged by determining a way that a DPF regeneration mode is combined by active regeneration and passive regeneration, but because of existence of lubricating oil ash content and sulfur element in diesel oil, the DPF inevitably accumulates ash content which cannot be removed by the active and passive regeneration, such as sulfate, phosphate and oxide of calcium, magnesium and zinc, in the long-term use process, so that the DPF is required to be disassembled for off-line regeneration, and the auxiliary DPF regeneration equipment can effectively solve the problem.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a particulate matter trapping liquid of a diesel vehicle DPF regeneration device, which can quickly trap particulate matters carried in large-flow gas and has high trapping efficiency;
the invention aims to provide a preparation method of a particulate matter trapping liquid of a diesel vehicle DPF regeneration device.
The technical scheme is as follows: the particulate matter trapping liquid for the diesel vehicle DPF regeneration device comprises the following components in percentage by mass: 0.1-5% of pH regulator, 0.1-5% of oil stain solubilizer, 1-5% of penetrating agent, 0.1-1% of bactericidal preservative, 0.001-0.1% of foam inhibitor and the balance of water.
Preferably, the osmotic agent comprises at least one of fatty alcohol polyoxyethylene ether-9, polysorbate-80, fatty acid methyl ester ethoxylate, sodium lauryl sulfate and sodium dodecyl benzene sulfonate.
Preferably, the pH adjuster includes at least one of sodium hydroxide, potassium hydroxide, isopropanolamine, and tetramethylammonium hydroxide.
Preferably, the oil stain solubilizing agent comprises at least one of dimethyl sulfoxide, N-methylacetamide, triethanolamine and diethanolamine.
Preferably, the foam inhibitor is at least one of Dow Corning AEF-3168, FM-3110, butyl phosphate triester, polyoxypropylene glyceryl ether.
Preferably, the antiseptic preservative is cason.
The preparation method of the particulate matter trapping liquid of the diesel vehicle DPF regeneration device comprises the following steps: adding a pH regulator into deionized water, stirring and adding an oil stain solubilizer, a penetrating agent, a sterilizing preservative and a foam inhibitor according to the proportion of the components, stirring to obtain uniform liquid, and filtering to obtain the particle trapping liquid.
The pH regulator provided by the invention regulates the cleaning fluid system to be alkaline, is beneficial to dissolving saponifiable grease on the surface of the particulate matter under an alkaline condition, and is used for removing unsaponifiable grease by cooperating with a penetrant, quickly removing a grease coating on the surface of the particulate matter and accelerating the infiltration speed; meanwhile, the system is adjusted to be under the alkaline condition, so that the ionization effect of the penetrant can be improved, the formation of micelles is facilitated, the critical micelle concentration of the penetrant is reduced, the penetration capacity of the particulate matter is improved, and the trapping effect is enhanced.
Has the advantages that: compared with the prior art, the invention can obtain the following beneficial effects: 1. the device can quickly capture particles carried in the large-flow gas, thereby reducing the dust pollution caused by direct discharge of the gas and having high efficiency. 2. The oil stain solubilizer can effectively promote residual oil stains in the particles and accelerate wetting and capturing of the particles, the penetrating agent can quickly infiltrate the particles and disperse in liquid, sterilization can inhibit reduction of product effect caused by bacterial colony growth in the use process of the product, and the foam inhibitor is used for inhibiting foam generated by capturing a large amount of gas of the particles. 3. The preparation method is simple and low in cost.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Example 1
The raw materials comprise: 1% of sodium hydroxide, 2% of dimethyl sulfoxide, 2.5% of sodium dodecyl benzene sulfonate, 0.05% of carbazone, AEF-31680.005% and the balance of deionized water.
The preparation method comprises the following steps: adding sodium hydroxide into deionized water, stirring, adding dimethyl sulfoxide, sodium dodecyl benzene sulfonate, Kathon and AEF-3168, slowly stirring to obtain uniform liquid, and filtering to obtain particulate matter trapping liquid.
The detection of the total wetting time of the particulate matters trapped by 1g of DPF on the surface of 100mL of the trapping liquid is 10.16 seconds by referring to the national standard GB/T5451-2001 'wettability determination method for pesticide wettable powder', which shows that the particle trapping liquid prepared according to the invention can effectively wet and trap the particles brought out by gas in the regeneration process of the DPF;
and (3) detecting the shading degree change rate:
the light-shielding rate (light-shielding rate before gas passes through the collection liquid-light-shielding rate after gas passes through the collection liquid)/light-shielding rate before gas passes through the collection liquid 100%. The results of the wet time measurement and the results of the light-shielding degree change rate measurement are shown in Table 1.
Example 2
The raw materials comprise: 2% of potassium hydroxide, 0.5% of triethanolamine, 5% of sodium dodecyl benzene sulfonate, 0.05% of carbazone, 0.05% of polyoxypropylene glycerol ether and the balance of deionized water.
The preparation method comprises the following steps: adding potassium hydroxide into deionized water, stirring, adding triethanolamine, sodium dodecyl benzene sulfonate, Kathon and polyoxypropylene glycerol ether, slowly stirring to obtain uniform liquid, and filtering to obtain the particulate matter trapping liquid.
The wetting time and the degree of change in opacity were measured as described in example 1, and the results are shown in Table 2.
Example 3
The raw materials comprise: 2% of sodium hydroxide, 2% of N-methylacetamide, 92.5% of fatty alcohol-polyoxyethylene ether, 0.03% of carbazone, AEF-31680.01% and the balance of deionized water.
The preparation method comprises the following steps: adding sodium hydroxide into deionized water, stirring, adding N-methylacetamide, fatty alcohol-polyoxyethylene ether-9, kasong and AEF-3168, slowly stirring to obtain uniform liquid, and filtering to obtain the particulate matter trapping liquid.
The wetting time and the degree of change in opacity were measured as described in example 1, and the results are shown in Table 3.
Example 4
The raw materials comprise: 3% of isopropanolamine, 1% of diethanolamine, 1.5% of fatty acid methyl ester ethoxylate, 0.02% of cason, 0.05% of phosphotriester and the balance of deionized water.
The preparation method comprises the following steps: adding isopropanolamine into deionized water, stirring, adding diethanolamine, fatty acid methyl ester ethoxylate, Kathon and phosphotriester, slowly stirring to obtain uniform liquid, and filtering to obtain the particulate matter trapping liquid.
The wetting time and the degree of change in opacity were measured as described in example 1, and the results are shown in Table 4.
Example 5
The raw materials comprise: 5% of tetramethylammonium hydroxide, 2% of diethanolamine, 0.01% of carbone, 0.805% of polysorbate-31100.01% and the balance of deionized water.
The preparation method comprises the following steps: adding tetramethylammonium hydroxide into deionized water, stirring, adding diethanolamine, polysorbate-80, kasonne and FM-3110, slowly stirring to obtain uniform liquid, and filtering to obtain the particulate matter trapping liquid.
The wetting time and the degree of change in opacity were measured as described in example 1, and the results are shown in Table 5.
Example 6
The raw materials comprise: 1% of tetramethylammonium hydroxide, 2% of dimethyl sulfoxide, 2.5% of fatty acid methyl ester ethoxylate, 0.03% of carbazone, AEF-31680.005% and the balance of deionized water.
The preparation method comprises the following steps: adding tetramethylammonium hydroxide into deionized water, stirring, adding dimethyl sulfoxide, fatty acid methyl ester ethoxylate, Kathon and AEF-3168, slowly stirring to obtain uniform liquid, and filtering to obtain particulate matter trapping liquid.
The wetting time and the degree of change in opacity were measured as described in example 1, and the results are shown in Table 6.
Example 7
The raw materials comprise: 4% of potassium hydroxide, 2% of triethanolamine, 801% of polysorbate, 0.01% of cason, 31680.02% of AEF, and the balance of deionized water.
The preparation method comprises the following steps: adding potassium hydroxide into deionized water, stirring, adding triethanolamine, polysorbate-80, Kathon, and AEF-3168, slowly stirring to obtain uniform liquid, and filtering to obtain particulate matter trapping liquid.
The wetting time and the degree of change in opacity were measured as described in example 1, and the results are shown in Table 7.
Comparative examples 1 to 1
The basic material formulation was the same as in example 1, except that sodium hydroxide was not added to the material of this example, and the wetting time and the degree of change in opacity were measured by the method shown in example 1, and the results are shown in table 1.
Comparative examples 1 to 2
The basic material formulation was the same as in example 1, except that sodium dodecylsulfate was used instead of sodium dodecylbenzenesulfonate in this example, and the wetting time and the degree of change in opacity were measured by the method shown in example 1, and the results are shown in Table 1.
Comparative examples 1 to 3
The basic material formulation is the same as that of example 1, except that the amount of sodium dodecylbenzenesulfonate added in this example is reduced from 2.5% to 0.3%, and the wetting time and the degree of change in opacity are measured by the method shown in example 1, and the results are shown in table 1.
TABLE 1
As can be seen from the data of comparative examples 1-1 in Table 1, in this example, the pH regulator was not added, but the infiltration time was significantly increased as compared with 1, which indicates that the pH regulator has a large influence on the infiltration effect of the collection liquid, and the change rate of the degree of opacity is smaller than that of example 1, the infiltration effect influences the final collection effect of the particulate matter, and the change rate of the degree of opacity before and after collection of the particulate matter is smaller as indicated by the lower change rate of the degree of opacity, so the change rate of the degree of opacity is low.
As can be seen from the data of comparative examples 1-2 in table 1, in this example, sodium dodecylbenzenesulfonate was changed to sodium dodecylsulfate, and the wetting time was increased compared with 1, which indicates that different wetting agents have a greater effect on the wetting effect of the capture liquid, and in this comparison, the wetting effect of sodium dodecylbenzenesulfonate is better than that of sodium dodecylsulfate, and the shading degree change rate is smaller than that of example 1, and the wetting effect affects the final capture effect of the particles, and the lower shading degree change rate indicates that the change before and after the capture of the particles is smaller, so the shading degree change rate is low.
As can be seen from the data of comparative examples 1 to 3 in table 1, the addition amount of the sodium dodecylbenzenesulfonate in this example is only 0.3%, and the infiltration time is much longer than that in example 1, which indicates that the addition amount ratio of the sodium dodecylbenzenesulfonate has a large influence on the infiltration effect of the particulate matter, and the change rate of the opacity is much smaller than that in example 1, the infiltration effect influences the final trapping effect of the particulate matter, and the change before and after the particulate matter is trapped is small due to the low change rate of the opacity, so the change rate of the opacity is low.
Comparative example 2-1
The basic material formulation is the same as that of example 2, except that sodium dodecylbenzenesulfonate is not added to the material of this example, and the wetting time and the degree of change in opacity are measured by the method shown in example 1, and the results are shown in table 2.
Comparative examples 2 to 2
The basic material formulation was the same as in example 2, except that polysorbate-20 was used instead of sodium dodecylbenzenesulfonate in this example, and the wetting time and the change rate of the degree of opacity were measured as shown in example 1, and the results are shown in table 2.
TABLE 2
As can be seen from the data of comparative example 2-1 in Table 2, the wetting agent is not added in the present example, the wetting effect is significantly reduced, the change rate of the light-shielding degree is low, and the trapping rate of the trapping liquid on the particulate matters is poor.
As can be seen from the data of comparative example 2-2 in Table 2, the wetting effect of sodium dodecylbenzenesulfonate in this comparison is better than polysorbate-20.
Comparative example 3-1
The basic material formulation was the same as in example 3, except that N-methylacetamide was not added to the material of this example, and the wetting time and the degree of change in opacity were measured by the method shown in example 1, and the results are shown in Table 3.
Comparative examples 3 to 2
The basic material formulation is the same as that in example 3, except that sodium lauryl sulfate is used instead of fatty alcohol-polyoxyethylene ether-9 in this example, and the wetting time and the change rate of the degree of opacity are measured by the method shown in example 1, and the results are shown in table 3.
TABLE 3
As can be seen from the data of the comparative example 3-1 in the table 3, the oil stain solubilizer is not added in the embodiment, the wetting effect is reduced, the change rate of the shading degree is low, and the oil stain solubilizer can enable the catching liquid to wrap and disperse the oil stains on the surface of the particles more quickly, so that the wetting of the particles is accelerated, and a certain promoting effect is realized on the particle catching.
As can be seen from the data of comparative example 3-2 in Table 3, the wetting effect of fatty alcohol polyoxyethylene ether-9 in this comparison is better than that of sodium dodecyl sulfate.
Comparative example 4-1
The basic material formulation was the same as in example 4, except that isopropanolamine was not added to the material of this example, and the wetting time and the degree of change in opacity were measured as shown in example 1, with the results shown in Table 4.
Comparative examples 4 to 2
The base stock formulation was the same as in example 4 except that polysorbate-80 was used instead of fatty acid methyl ester ethoxylate, and the wetting time and the rate of change in opacity were measured as shown in example 1, and the results are shown in Table 4.
Comparative examples 4 to 3
The basic material formulation was the same as in example 4, except that the amount of isopropanolamine added to the material of this example was increased by 10%, and the wetting time and the degree of change in opacity were measured as shown in example 1, and the results are shown in Table 4.
TABLE 4
As can be seen from the data of comparative example 4-2 in Table 4, the wetting effect of the fatty acid methyl ester ethoxylate was superior to polysorbate-80 in this comparison.
As can be seen from the data of comparative examples 4 to 3 in Table 4, the pH regulator of this example has an increased amount of isopropanolamine added, and the wetting effect does not change significantly, and the rate of change in degree of opacity decreases, indicating that the effect of the capture solution does not increase indefinitely as the amount of isopropanolamine added increases.
Comparative example 5-1
The base material formulation was the same as in example 5, except that FM-3110 was not added to the material of this example, and the wetting time and the degree of change in opacity were measured by the method shown in example 1, and the results are shown in Table 5.
Comparative examples 5 to 2
The base material formulation was the same as in example 5 except that polysorbate-20 was used instead of polysorbate-80 in this example, and the wetting time and the rate of change in opacity were measured as shown in example 1, and the results are shown in table 5.
TABLE 5
As can be seen from the data of comparative example 5-1 in Table 5, in this example, no defoaming agent was added, the wetting time was substantially unchanged, a large amount of liquid was blown away after foaming during the experiment, gas channels were formed, the contact area with the particulate matter was reduced, and the collection efficiency was lowered.
As can be seen from the data of comparative example 5-2 in Table 5, polysorbate-80 had a better wetting effect than polysorbate-20 in this comparison.
Comparative example 6-1
The basic material formulation was the same as in example 6, except that tetramethylammonium hydroxide was not added to the material of this example, and the wetting time and the degree of change in opacity were measured by the method shown in example 1, and the results are shown in Table 6.
Comparative examples 6 to 2
The basic material formulation was the same as in example 6, except that polyoxyethylene lauryl ether was used instead of fatty acid methyl ester ethoxylate, and the change rate of wetting time and degree of light-screening was measured as shown in example 1, and the results are shown in Table 6.
TABLE 6
As can be seen from the data of comparative example 6-2 in Table 6, the polyoxyethylene lauryl ether has better wetting effect than the fatty acid methyl ester ethoxylate in this comparison.
Comparative example 7-1
The basic material formulation was the same as in example 7 except that AEF-3168 was not added to the material of this example, and the wetting time and the degree of change in opacity were measured by the method shown in example 1, and the results are shown in Table 7.
Comparative examples 7 to 2
The base material formulation was the same as in example 7, except that polyoxyethylene lauryl ether was used in place of polysorbate-80 in this example, and the wetting time and the rate of change in opacity were measured as shown in example 1, and the results are shown in Table 7.
TABLE 7
As can be seen from the data of comparative example 7-2 in Table 7, the wetting effect of polyoxyethylene lauryl ether in this comparison is slightly better than that of polysorbate-80.
Claims (7)
1. The particulate matter trapping liquid for the diesel vehicle DPF regeneration device is characterized by comprising the following components in percentage by mass: 0.1-5% of pH regulator, 0.1-5% of oil stain solubilizer, 1-5% of penetrating agent, 0.1-1% of bactericidal preservative, 0.001-0.1% of foam inhibitor and the balance of water.
2. The diesel vehicle DPF regeneration device particulate matter trap of claim 1, wherein the penetrant comprises at least one of fatty alcohol polyoxyethylene ether-9, polysorbate-80, fatty acid methyl ester ethoxylate, sodium lauryl sulfate, sodium dodecyl benzene sulfonate.
3. The diesel vehicle DPF regeneration device particulate matter trap liquid of claim 1, wherein the pH adjusting agent comprises at least one of sodium hydroxide, potassium hydroxide, isopropanolamine, tetramethylammonium hydroxide.
4. The diesel vehicle DPF regeneration device particulate matter trapping liquid of claim 1, wherein the oil stain solubilizing agent comprises at least one of dimethyl sulfoxide, N-methyl acetamide, triethanolamine, and diethanolamine.
5. The diesel vehicle DPF regeneration device particulate matter trap of claim 1, wherein the foam inhibitor comprises at least one of Dow Corning AEF-3168, FM-3110, butyl phosphate triester, polyoxypropylene glyceryl ether.
6. The diesel vehicle DPF regeneration device particulate matter trap liquid of claim 1, wherein said bactericidal preservative is Carson.
7. A method for preparing a particulate matter trapping liquid for a DPF regeneration device of a diesel vehicle as set forth in claim 1, comprising the steps of: dissolving a pH regulator in water, stirring and adding an oil stain solubilizer, a penetrating agent, a sterilizing preservative and a foam inhibitor according to the proportion of the components, and filtering to obtain the particulate matter trapping liquid.
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Application publication date: 20200929 |