CN114181758A - Transformer oil and preparation method thereof - Google Patents
Transformer oil and preparation method thereof Download PDFInfo
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- CN114181758A CN114181758A CN202010967154.3A CN202010967154A CN114181758A CN 114181758 A CN114181758 A CN 114181758A CN 202010967154 A CN202010967154 A CN 202010967154A CN 114181758 A CN114181758 A CN 114181758A
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- base oil
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- transformer oil
- transformer
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- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000003921 oil Substances 0.000 claims abstract description 79
- 239000002199 base oil Substances 0.000 claims abstract description 66
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 29
- 239000011707 mineral Substances 0.000 claims abstract description 29
- 150000002148 esters Chemical class 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 239000012452 mother liquor Substances 0.000 claims abstract description 27
- 238000003756 stirring Methods 0.000 claims abstract description 26
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 24
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000012258 stirred mixture Substances 0.000 claims abstract description 12
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical group CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 13
- -1 pentaerythritol ester Chemical class 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 abstract description 16
- 238000002156 mixing Methods 0.000 abstract description 4
- 125000000753 cycloalkyl group Chemical group 0.000 description 10
- 238000001914 filtration Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/283—Esters of polyhydroxy compounds
- C10M2207/2835—Esters of polyhydroxy compounds used as base material
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Organic Insulating Materials (AREA)
- Lubricants (AREA)
Abstract
The invention provides transformer oil, which comprises the following components in parts by weight: 90-95 parts of mineral base oil; 5-10 parts of synthetic ester base oil; 0.2 to 0.3 portion of antioxidant. Based on the above, the invention also provides a preparation method of the transformer oil, which comprises the following steps: heating the synthetic ester base oil to a set temperature; adding an antioxidant to obtain a mother liquor mixture; fully stirring the mother liquor mixture; adding mineral base oil and fully stirring; the stirred mixture was filtered under vacuum. The transformer oil prepared by blending 90-95 parts of mineral base oil, 5-10 parts of synthetic ester base oil and 0.2-0.3 part of antioxidant can ensure that the oil product meets various index requirements, and can also meet the breakdown voltage higher than 40kV under the moisture content of more than 30mg/kg, thereby improving the electrical performance of the oil product. Moreover, the price of the transformer oil is much lower than that of the total synthetic ester type transformer oil.
Description
Technical Field
The invention relates to the technical field of preparation of transformer oil, in particular to transformer oil and a preparation method thereof.
Background
The transformer oil is mainly used in oil-filled electrical equipment such as transformers, reactors, mutual inductors, sleeves, oil switches and the like, and plays roles in insulation, cooling and protection. The transformer oil is used as an insulating medium of electrical equipment and has good electrical performance, and the breakdown voltage is an important index for evaluating the electrical performance of the transformer oil. Generally, dry and clean oil products have a relatively high breakdown voltage, but when oil contains free moisture, dissolved moisture or solids, since these impurities have conductivity and node constants larger than those of oil itself, they form an electrically conductive bridge circuit under the action of an electric field (voltage), thereby reducing the breakdown voltage value of oil. The moisture is one of important reasons influencing the insulation aging of transformer equipment, and years of running experience of transformer insulation shows that the voltage breakdown value of transformer oil is easier to reduce by trace moisture compared with other impurities.
After the transformer oil is filled into the transformer, moisture in materials in the transformer, such as paper boards, laminated wood and the like, can be absorbed, so that the breakdown voltage is reduced, and the electrical performance of the transformer oil is further influenced.
Disclosure of Invention
The invention aims to provide transformer oil and a preparation method thereof, which can ensure that an oil product meets various index requirements, can also meet the condition that the breakdown voltage is higher than 40kV under the condition that the water content exceeds 30mg/kg, and improve the electrical performance of the oil product.
In order to achieve the above object, the present invention provides a transformer oil, comprising, by weight:
90-95 parts of mineral base oil;
5-10 parts of synthetic ester base oil;
0.2 to 0.3 portion of antioxidant.
Optionally, the mineral base oil is a non-naphthenic hydrogenated base oil.
Optionally, transportation of said non-cyclic alkyl hydrogenated base oil at 40 ℃The dynamic viscosity is between 9.5mm2/s-10.5mm2Is between/s.
Optionally, the synthetic ester base oil is a halogen-free pentaerythritol ester.
Optionally, the antioxidant is 2, 6-di-tert-butyl-p-methylphenol.
Based on the above, the application also provides a preparation method of the transformer oil, which comprises the following steps:
heating the synthetic ester base oil to a set temperature;
adding an antioxidant to obtain a mother liquor mixture;
fully stirring the mother liquor mixture;
adding mineral base oil and fully stirring;
the stirred mixture was filtered under vacuum.
Optionally, the set temperature is 70 ℃ to 75 ℃.
Optionally, the mother liquor mixture is stirred sufficiently for 1h to 2 h.
Optionally, the mineral base oil is added and stirred for 1.5h-2.5 h.
Optionally, the mineral base oil is non-cycloalkyl hydrogenated base oil, the synthetic ester base oil is halogen-free pentaerythritol ester, and the antioxidant is 2, 6-di-tert-butyl-p-methylphenol.
The invention provides transformer oil, which comprises the following components in parts by weight: 90-95 parts of mineral base oil; 5-10 parts of synthetic ester base oil; 0.2 to 0.3 portion of antioxidant. Based on the above, the invention also provides a preparation method of the transformer oil, which comprises the following steps: heating the synthetic ester base oil to a set temperature; adding an antioxidant to obtain a mother liquor mixture; fully stirring the mother liquor mixture; adding mineral base oil and fully stirring; the stirred mixture was filtered under vacuum. The transformer oil prepared by blending 90-95 parts of mineral base oil, 5-10 parts of synthetic ester base oil and 0.2-0.3 part of antioxidant can ensure that the oil product meets various index requirements, and can also meet the breakdown voltage higher than 40kV under the moisture content of more than 30mg/kg, thereby improving the electrical performance of the oil product. Moreover, the price of the transformer oil is much lower than that of the total synthetic ester type transformer oil.
Drawings
Fig. 1 is a step diagram of a method for preparing transformer oil according to an embodiment of the present invention.
Detailed Description
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
The transformer oil is mainly used in oil-filled electrical equipment such as transformers, reactors, mutual inductors, sleeves, oil switches and the like, and plays roles in insulation, cooling and protection. The conventional mineral transformer oil has high cost performance, but is easy to cause breakdown voltage reduction after water absorption, the water content is required to be not more than 30mg/kg, and the synthetic ester transformer oil can maintain relatively high breakdown voltage even if the water content is high after water absorption, but is expensive.
In order to solve the technical problems, the invention provides transformer oil which comprises the following components in parts by weight:
90-95 parts of mineral base oil;
5-10 parts of synthetic ester base oil;
0.2 to 0.3 portion of antioxidant.
The transformer oil prepared by blending 90-95 parts of mineral base oil, 5-10 parts of synthetic ester base oil and 0.2-0.3 part of antioxidant can ensure that the oil product meets various index requirements, and can also meet the breakdown voltage higher than 40kV under the moisture content of more than 30mg/kg, thereby improving the electrical performance of the oil product. Moreover, the price of the transformer oil is much lower than that of the total synthetic ester type transformer oil.
In this example, the mineral base oil is a non-naphthenic hydrogenated base oil. The non-cycloalkyl hydrogenated base oil may be produced by fractionating a non-cycloalkyl base oil, followed by a hydrogenation process. The closed flash point of the transformer oil can be improved, the kinematic viscosity of the transformer oil can be reduced, and the viscosity-temperature performance can be greatly improved.
In this example, the kinematic viscosity at 40 ℃ of the non-cyclic alkyl hydrogenated base oil is between 9.5mm2/s-10.5mm2Is between/s.
In this embodiment, the synthetic ester base oil is a halogen-free pentaerythritol ester. The halogen-free pentaerythritol ester has excellent lubricating property, high viscosity index, good flame resistance, biodegradation rate of more than 90 percent and good environmental protection property.
In this example, the antioxidant is 2, 6-di-tert-butyl-p-methylphenol. The 2, 6-di-tert-butyl-p-methylphenol is an oil-soluble antioxidant widely used at home and abroad, has stronger oxidation resistance, good heat resistance and stability, no specific odor, no color reaction when meeting metal ions and the like although the toxicity is higher, has low price and is suitable for preparing the transformer oil.
Based on this, referring to fig. 1, the present application further provides a preparation method of transformer oil, including:
step S1: heating the synthetic ester base oil to a set temperature;
step S2: adding an antioxidant to obtain a mother liquor mixture;
step S3: fully stirring the mother liquor mixture;
step S4: adding mineral base oil and fully stirring;
step S5: the stirred mixture was filtered under vacuum.
Wherein the set temperature in the step S1 is 70-75 ℃, the time for fully stirring the mother liquor mixture in the step S3 is 1-2 h, the time for fully stirring the mineral base oil in the step S4 is 1.5-2.5 h, the mineral base oil is non-cycloalkyl hydrogenated base oil, the synthetic ester base oil is halogen-free pentaerythritol ester, and the antioxidant is 2, 6-di-tert-butyl-p-methylphenol.
In order to make the disclosure of the present invention more comprehensible, the present invention is further described in conjunction with the following embodiments. It is to be understood that the invention is not limited to the specific embodiments described below, and that general alternatives known to those skilled in the art are intended to be included within the scope of the invention.
Experimental groups:
example 1
Heating 10 parts of halogen-free pentaerythritol ester to 70 ℃, adding 0.2 part of 2, 6-di-tert-butyl-p-methylphenol to obtain a mother liquor mixture, fully stirring the mother liquor mixture for 2 hours, adding 90 parts of non-cycloalkyl hydrogenated base oil, fully stirring for 2.5 hours, and filtering the stirred mixture in vacuum to obtain the final transformer oil.
Example 2
Heating 10 parts of halogen-free pentaerythritol ester to 75 ℃, adding 0.2 part of 2, 6-di-tert-butyl-p-methylphenol to obtain a mother liquor mixture, fully stirring the mother liquor mixture for 1 hour, adding 90 parts of non-cycloalkyl hydrogenated base oil, fully stirring for 1.5 hours, and filtering the stirred mixture in vacuum to obtain the final transformer oil.
Example 3
Heating 5 parts of halogen-free pentaerythritol ester to 70 ℃, adding 0.2 part of 2, 6-di-tert-butyl-p-methylphenol to obtain a mother liquor mixture, fully stirring the mother liquor mixture for 2 hours, adding 95 parts of non-cycloalkyl hydrogenated base oil, fully stirring for 1.5 hours, and filtering the stirred mixture in vacuum to obtain the final transformer oil.
Example 4
Heating 5 parts of halogen-free pentaerythritol ester to 75 ℃, adding 0.2 part of 2, 6-di-tert-butyl-p-methylphenol to obtain a mother liquor mixture, fully stirring the mother liquor mixture for 1 hour, adding 95 parts of non-cycloalkyl hydrogenated base oil, fully stirring for 2.5 hours, and filtering the stirred mixture in vacuum to obtain the final transformer oil.
Example 5
Heating 5 parts of halogen-free pentaerythritol ester to 70 ℃, adding 0.3 part of 2, 6-di-tert-butyl-p-methylphenol to obtain a mother liquor mixture, fully stirring the mother liquor mixture for 2 hours, adding 95 parts of non-cycloalkyl hydrogenated base oil, fully stirring for 2.5 hours, and filtering the stirred mixture in vacuum to obtain the final transformer oil.
Example 6
Heating 10 parts of halogen-free pentaerythritol ester to 75 ℃, adding 0.3 part of 2, 6-di-tert-butyl-p-methylphenol to obtain a mother liquor mixture, fully stirring the mother liquor mixture for 1 hour, adding 90 parts of non-cycloalkyl hydrogenated base oil, fully stirring for 2.5 hours, and filtering the stirred mixture in vacuum to obtain the final transformer oil.
Key characteristic analysis tests are carried out on the transformer oil prepared in the embodiment 1-6, and the test results are shown in the table 1.
TABLE 1 analysis of Key Properties of examples 1-6
As shown in Table 1, the transformer oil prepared by using 90-95 parts of mineral base oil, 5-10 parts of synthetic ester base oil and 0.2-0.3 part of antioxidant can ensure that the oil product meets various index requirements, and can also meet the breakdown voltage higher than 40kV under the moisture content of more than 30mg/kg, thereby improving the electrical performance of the oil product.
In addition, the corresponding relation between different moisture contents and breakdown voltages of the conventional mineral transformer oil and the transformer oil product of the invention is compared, and the data is shown in table 2.
Table 2 inventive transformer oil compared to conventional mineral transformer oil
As can be seen from Table 2, the sensitivity of the breakdown voltage to water content is reduced compared to conventional transformer oils, i.e., the breakdown voltage is higher than 40kV even at a moisture content of more than 30 mg/kg. Therefore, after the transformer oil provided by the embodiment is filled in the transformer, moisture in other materials in the transformer, such as insulating paper, can be absorbed more easily, so that the insulating paper in the insulating system is drier, and the service life of the insulating system is prolonged.
To sum up, an embodiment of the present invention provides a transformer oil, which includes, by weight: 90-95 parts of mineral base oil; 5-10 parts of synthetic ester base oil; 0.2 to 0.3 portion of antioxidant. Based on the above, the invention also provides a preparation method of the transformer oil, which comprises the following steps: heating the synthetic ester base oil to a set temperature; adding an antioxidant to obtain a mother liquor mixture; fully stirring the mother liquor mixture; adding mineral base oil and fully stirring; the stirred mixture was filtered under vacuum. The transformer oil prepared by blending 90-95 parts of mineral base oil, 5-10 parts of synthetic ester base oil and 0.2-0.3 part of antioxidant can ensure that the oil product meets various index requirements, and can also meet the breakdown voltage higher than 40kV under the moisture content of more than 30mg/kg, thereby improving the electrical performance of the oil product. Moreover, the price of the transformer oil is much lower than that of the total synthetic ester type transformer oil.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A transformer oil, characterized by comprising, in parts by weight:
90-95 parts of mineral base oil;
5-10 parts of synthetic ester base oil;
0.2 to 0.3 portion of antioxidant.
2. The transformer oil of claim 1, wherein the mineral base oil is a non-cyclic alkyl hydrogenated base oil.
3. The transformer oil of claim 2, wherein the non-cyclic alkyl hydrogenated base oil has a kinematic viscosity at 40 ℃ of 9.5mm2/s-10.5mm2Is between/s.
4. The transformer oil of claim 1, wherein the synthetic ester base oil is a halogen-free pentaerythritol ester.
5. The transformer oil of claim 1, wherein the antioxidant is 2, 6-di-tert-butyl-p-methylphenol.
6. A method for preparing transformer oil according to any one of claims 1-5, comprising:
heating the synthetic ester base oil to a set temperature;
adding an antioxidant to obtain a mother liquor mixture;
fully stirring the mother liquor mixture;
adding mineral base oil and fully stirring;
the stirred mixture was filtered under vacuum.
7. The method of claim 6, wherein the set temperature is 70 ℃ to 75 ℃.
8. The method of claim 6, wherein the mother liquor mixture is stirred for a period of time ranging from 1h to 2 h.
9. The method of claim 6, wherein the mineral base oil is added and stirred for a period of time of 1.5h to 2.5 h.
10. The method of claim 6, wherein the mineral base oil is a non-cyclic alkyl hydrogenated base oil, the synthetic ester base oil is a halogen-free pentaerythritol ester, and the antioxidant is 2, 6-di-tert-butyl-p-methylphenol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010967154.3A CN114181758A (en) | 2020-09-15 | 2020-09-15 | Transformer oil and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010967154.3A CN114181758A (en) | 2020-09-15 | 2020-09-15 | Transformer oil and preparation method thereof |
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| Publication Number | Publication Date |
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| CN114181758A true CN114181758A (en) | 2022-03-15 |
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| CN202010967154.3A Pending CN114181758A (en) | 2020-09-15 | 2020-09-15 | Transformer oil and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597888A (en) * | 2003-08-22 | 2005-03-23 | 日产自动车株式会社 | Low-friction sliding member in transmission, and transmission oil therefor |
| CN101784646A (en) * | 2007-07-31 | 2010-07-21 | 雪佛龙美国公司 | Electric insulation oil composition and preparation thereof |
| CN102757842A (en) * | 2011-04-29 | 2012-10-31 | 中国石油化工股份有限公司 | Ashless low-temperature hydraulic oil |
-
2020
- 2020-09-15 CN CN202010967154.3A patent/CN114181758A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597888A (en) * | 2003-08-22 | 2005-03-23 | 日产自动车株式会社 | Low-friction sliding member in transmission, and transmission oil therefor |
| CN101784646A (en) * | 2007-07-31 | 2010-07-21 | 雪佛龙美国公司 | Electric insulation oil composition and preparation thereof |
| CN102757842A (en) * | 2011-04-29 | 2012-10-31 | 中国石油化工股份有限公司 | Ashless low-temperature hydraulic oil |
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