Anti-aging transformer oil and preparation method thereof

Abstract

The invention discloses a preparation method for anti-aging transformer oil. The preparation method comprises the following steps: subjecting naphthenic oil to a hydrogenation catalytic cracking reaction, then adding hydrogen, adding a hydrodewaxing agent, carrying out a catalytic reaction to obtain hydrogenated oil, refining the hydrogenated oil to obtain refined oil, adding dialkyldithiocarbamate into the refined oil, carrying out uniform mixing, then adding 3-(3,5-di-tert-butyl-4-hydroxyphenyl)isooctyl acrylate, carrying out uniform mixing, and then performing vacuum dehydration to obtain the anti-aging transformer oil. The invention also discloses the anti-aging transformer oil, which is prepared by using the above preparation method. The preparation method of the invention can effectively improve the oxidation stability of the transformer oil, reduce the generation of oily sludge, and delay the increase of a dielectric loss factor.

Description

technical field

[0001] The invention relates to the technical field of transformer oil, in particular to an anti-aging transformer oil and a preparation method thereof. Background technique

[0002] Transformers are important equipment for power grid distribution. At present, most of the transformers used are oil-immersed transformers, especially the transmission transformers running on the main power grid and the distribution transformers running on the terminals. In the current power grid, my country's 800kV, During the construction and expansion period of the UHV power grid with AC 1000kV and above voltage level, transformers play an absolutely important role in all links of power generation, transmission, distribution, power conversion and power consumption in the power industry, and occupy a very important role in the national economy. status.

[0003] my country's demand for long-distance, large-capacity high-voltage and UHV power transmission is increasing day by day. ...

Examples

Embodiment 1

[0031] A method for preparing an anti-aging transformer oil, comprising the following steps: taking naphthenic oil for hydrogenation catalytic cracking reaction, then adding hydrogen gas, adding a hydrogenation depreciating agent for catalytic reaction to obtain hydrogenated oil, refining to obtain refined oil, and feeding Add dialkyl dithiocarbamate to the refined oil and mix well, then add 3-(3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl acrylate and mix well, then vacuum dehydrate to obtain anti-aging transformer Oil.

Embodiment 2

[0033] A preparation method of anti-aging transformer oil, comprising the following steps: adding hydrogen gas to naphthenic I-10°C oil, the pressure of hydrogenation gas is 3MPa, heating up to 300°C, adding the silicon attached to active Ni after sulfidation and passivation Aluminum catalyst, heat preservation for hydrogenation catalytic cracking reaction for 30min, wherein, the volume ratio of hydrogen to cycloalkyl I-10°C oil is 1000:1, cycloalkyl I-10°C and silicon attached to active Ni after sulfuration passivation The weight ratio of the aluminum catalyst is 100:0.25;

[0034] Raise the temperature to 310°C, then add hydrogen, the pressure of hydrogenation is 3MPa, add mordenite attached to active metal Ni, keep it warm for catalysis reaction for 120min, and cool to obtain hydrogenated oil, wherein, hydrogen and naphthenic I-10°C oil The volume ratio is 500:1, and the weight ratio of naphthenic I-10°C oil to active metal Ni-attached mordenite is 100:0.05;

[0035] Take ...

Embodiment 3

[0038] A preparation method of anti-aging transformer oil, comprising the following steps: adding hydrogen to naphthenic I-10°C oil, the pressure of hydrogenation is 8MPa, heating up to 290°C, adding silicon attached to active Ni after sulfidation and passivation Aluminum catalyst, heat preservation for hydrogenation catalytic cracking reaction for 60min, wherein, the volume ratio of hydrogen and naphthenic I-10°C oil is 700:1, naphthenic I-10°C and silicon attached to active Ni after sulfurization passivation The weight ratio of the aluminum catalyst is 100:0.25;

[0039] Raise the temperature to 320°C, then add hydrogen, the pressure of hydrogenation is 10MPa, add mordenite attached to the active metal Ni, keep it warm for 90 minutes, and then cool to obtain hydrogenated oil, in which hydrogen and naphthenic I-10°C oil The volume ratio is 1000:1, and the weight ratio of naphthenic I-10°C oil to active metal Ni-attached mordenite is 100:0.05;

[0040] Take hydrogenated oil, ...

technical field

[0001] The invention relates to the technical field of transformer oil, in particular to an anti-aging transformer oil and a preparation method thereof. Background technique

[0002] Transformers are important equipment for power grid distribution. At present, most of the transformers used are oil-immersed transformers, especially the transmission transformers running on the main power grid and the distribution transformers running on the terminals. In the current power grid, my country's 800kV, During the construction and expansion period of the UHV power grid with AC 1000kV and above voltage level, transformers play an absolutely important role in all links of power generation, transmission, distribution, power conversion and power consumption in the power industry, and occupy a very important role in the national economy. status.

[0003] my country's demand for long-distance, large-capacity high-voltage and UHV power transmission is increasing day by day. ...

Examples

Embodiment 1

[0031] A method for preparing an anti-aging transformer oil, comprising the following steps: taking naphthenic oil for hydrogenation catalytic cracking reaction, then adding hydrogen gas, adding a hydrogenation depreciating agent for catalytic reaction to obtain hydrogenated oil, refining to obtain refined oil, and feeding Add dialkyl dithiocarbamate to the refined oil and mix well, then add 3-(3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl acrylate and mix well, then vacuum dehydrate to obtain anti-aging transformer Oil.

Embodiment 2

[0033] A preparation method of anti-aging transformer oil, comprising the following steps: adding hydrogen gas to naphthenic I-10°C oil, the pressure of hydrogenation gas is 3MPa, heating up to 300°C, adding the silicon attached to active Ni after sulfidation and passivation Aluminum catalyst, heat preservation for hydrogenation catalytic cracking reaction for 30min, wherein, the volume ratio of hydrogen to cycloalkyl I-10°C oil is 1000:1, cycloalkyl I-10°C and silicon attached to active Ni after sulfuration passivation The weight ratio of the aluminum catalyst is 100:0.25;

[0034] Raise the temperature to 310°C, then add hydrogen, the pressure of hydrogenation is 3MPa, add mordenite attached to active metal Ni, keep it warm for catalysis reaction for 120min, and cool to obtain hydrogenated oil, wherein, hydrogen and naphthenic I-10°C oil The volume ratio is 500:1, and the weight ratio of naphthenic I-10°C oil to active metal Ni-attached mordenite is 100:0.05;

[0035] Take ...

Embodiment 3

[0038] A preparation method of anti-aging transformer oil, comprising the following steps: adding hydrogen to naphthenic I-10°C oil, the pressure of hydrogenation is 8MPa, heating up to 290°C, adding silicon attached to active Ni after sulfidation and passivation Aluminum catalyst, heat preservation for hydrogenation catalytic cracking reaction for 60min, wherein, the volume ratio of hydrogen and naphthenic I-10°C oil is 700:1, naphthenic I-10°C and silicon attached to active Ni after sulfurization passivation The weight ratio of the aluminum catalyst is 100:0.25;

[0039] Raise the temperature to 320°C, then add hydrogen, the pressure of hydrogenation is 10MPa, add mordenite attached to the active metal Ni, keep it warm for 90 minutes, and then cool to obtain hydrogenated oil, in which hydrogen and naphthenic I-10°C oil The volume ratio is 1000:1, and the weight ratio of naphthenic I-10°C oil to active metal Ni-attached mordenite is 100:0.05;

[0040] Take hydrogenated oil, ...

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