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Insulating oil base oil and preparation method thereof, and insulating oil

A technology of insulating oil and base oil, applied in the petroleum industry, processing hydrocarbon oil, hydrocarbon oil treatment products, etc., can solve the problems of unqualified breakdown voltage of main transformer casing oil, high kinematic viscosity, safety accidents, etc., and achieve excellent Oxidation stability, simple preparation process, and improved versatility

Inactive Publication Date: 2020-06-02
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the bushing is a high-field-strength structure, there are differences in the structure and use requirements between the bushing and the transformer, so when the transformer oil is filled in the transformer bushing, a series of safety accidents will occur in the transformer bushing, especially Problems such as excessive hydrogen content and unqualified breakdown voltage are mentioned in the papers "Analysis and Treatment of Excessive Hydrogen Content in Capacitive Bushing Insulating Oil" and "Treatment of Unqualified Breakdown Voltage in Main Transformer Bushing Oil" record
[0004] In addition, since transformer oil generally has disadvantages such as poor low-temperature properties and high kinematic viscosity, filling the transformer oil in the bushing will easily cause safety accidents during operation in the high-field structure of the transformer bushing.

Method used

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  • Insulating oil base oil and preparation method thereof, and insulating oil
  • Insulating oil base oil and preparation method thereof, and insulating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] This embodiment provides a base oil for insulating oil, which includes 70% of the first component, 25% of the second component, and 5% of the third component of synthetic oil benzyltoluene based on the total mass of 100%. . in:

[0060] The first component is prepared by the following steps:

[0061] (1) Hydrofining

[0062] The 280-350°C distillate of the naphthenic feedstock oil described in Table 1 is subjected to hydrotreating to obtain the first refined distillate.

[0063] The conditions for hydrofining are: hydrogen partial pressure 2.0Mpa, reaction temperature 450°C, volumetric space velocity 0.3h -1 , The volume ratio of hydrogen to oil is 2000:1.

[0064] The catalyzer that adopts is nickel-tungsten / amorphous silica-alumina catalyst, accounts for catalyzer weight percentage, and nickel content is 8wt%, and tungsten content is 27wt%, and silica carrier content is 10wt%, and remainder is alumina carrier; The physical parameters are: the average pore diamete...

Embodiment 2

[0082] This embodiment provides a base oil for insulating oil, which includes 75% of the first component, 22% of the second component, and 3% of the third component of synthetic oil benzyltoluene based on the total mass of 100%. . in:

[0083]The first component is prepared by the following steps:

[0084] (1) Hydrofining

[0085] The 280-350°C distillate of the naphthenic feedstock oil described in Table 1 is subjected to hydrotreating to obtain the first refined distillate.

[0086] The conditions of hydrofining are: hydrogen partial pressure 7.0Mpa, reaction temperature 360℃, volume space velocity 1.0h -1 , The volume ratio of hydrogen to oil is 500:1.

[0087] The catalyzer that adopts is nickel-tungsten / amorphous silica-alumina catalyst, accounts for catalyzer weight percentage, nickel content is 10wt%, tungsten content is 25wt%, silica carrier content is 15wt%, remainder is alumina carrier; The physical parameters are: the average pore diameter is The specific sur...

Embodiment 3

[0105] This embodiment provides a method for preparing insulating oil base oil, comprising the following steps:

[0106] 1. Prepare the first component

[0107] (1) Hydrofining

[0108] The 280-350°C distillate of the naphthenic feedstock oil described in Table 1 is subjected to hydrotreating to obtain the first refined distillate.

[0109] The conditions of hydrofining are: hydrogen partial pressure 5.0MPa, reaction temperature 340℃, volume space velocity 0.8h -1 , The volume ratio of hydrogen to oil is 300:1.

[0110] The catalyzer that adopts is nickel-tungsten / amorphous silica-alumina catalyst, accounts for catalyzer weight percentage, nickel content is 5wt%, tungsten content is 28wt%, silica carrier content is 13wt%, balance is alumina; The physical property of catalyst The parameters are: average pore diameter Specific surface area 120cm 2 / g, pore volume 0.3cm 3 / g, strength 28N / mm.

[0111] (2) furfural refining

[0112] The first refined distillate oil is sub...

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Abstract

The invention provides insulating oil base oil and a preparation method thereof, and insulating oil, and relates to the technical field of insulating oil for power equipment. The preparation method ofthe insulating oil base oil comprises the following steps: uniformly blending 60-90 parts of a first component, 7-30 parts of a second component and 3-10 parts of a third component, wherein the preparation method of the first component comprises: carrying out first hydrofining, furfural refining and white clay refining on first cycloalkyl distillate oil, and taking a distillate at 280-320 DEG C to obtain the first component, the preparation method of the second component comprises: carrying out second hydrofining and fractionation on second cycloalkyl distillate oil to obtain a distillate at280-320 DEG C so as to obtain the second component, and the third component is benzyl toluene oil.

Description

technical field [0001] The invention belongs to the technical field of insulating oil for electric equipment, and in particular relates to an insulating oil base oil, a preparation method thereof, and insulating oil, in particular to an insulating oil base oil and insulating oil used for transformer bushings. Background technique [0002] Transformer bushings are important auxiliary equipment and accessories in transformers. The transformer bushing is used to lead the lead wires of the high-voltage winding and low-voltage winding of the transformer to the outside of the oil tank respectively. It not only plays the role of insulating the lead wires from the ground, but also plays the role of fixing the lead wires. During the operation of the transformer, the transformer bushing not only needs to be able to withstand the working voltage and composite current for a long time, but also needs to have the ability to withstand short-term fault overvoltage and high current. Transfo...

Claims

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Application Information

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IPC IPC(8): C10G67/02H01F27/32
CPCC10G67/02C10G2400/12H01F27/32
Inventor 马蕊燕柯友胜张静何军丁平魏大雄
Owner PETROCHINA CO LTD
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