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Ternary mixed insulation oil and preparation method thereof

A technology of insulating oil and mixed oil, which is applied in the petroleum industry, lubricating composition, etc., can solve the problems of whether the performance parameters cannot meet the parameter requirements, unsatisfactory, unsatisfactory, etc.

Active Publication Date: 2018-06-08
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although these two binary mixed insulating oils have a certain effect of delaying the aging of insulating paper, many of their important performance parameters cannot meet the current GB2536-2011 "Unused Mineral Insulating Oils for Electrical Fluid Transformers and Switches" Relevant parameter requirements
For example, the kinematic viscosity of insulating oil mixed with olive oil and mineral oil is 12.855mm 2 / s, can no longer meet the national standard of not more than 12mm 2 / s requirements; its breakdown voltage is only 58kV, which does not meet the requirement of not less than 70kV stipulated in the national standard; the dielectric loss of the mixed insulating oil mixed with rapeseed oil and mineral oil is 0.597%, which cannot meet the national standard. No more than 0.5% of the requirements stipulated in

Method used

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  • Ternary mixed insulation oil and preparation method thereof
  • Ternary mixed insulation oil and preparation method thereof
  • Ternary mixed insulation oil and preparation method thereof

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preparation example Construction

[0038] The present invention provides a preparation method of the ternary hybrid insulating oil described in the above technical scheme, which includes the following steps:

[0039] a) Mix mineral oil, soybean oil and palm oil and stir to obtain mixed oil;

[0040] b) Mix part of the mixed oil and antioxidant, stir, and place at a constant temperature to obtain a mother liquor containing antioxidant;

[0041] c) Mixing the mother liquor containing the antioxidant and the remaining part of the mixed oil, stirring, and vacuum drying to obtain a ternary mixed insulating oil.

[0042] In the invention, mineral oil, soybean oil and palm oil are mixed and stirred to obtain mixed oil. In the present invention, the stirring rate is preferably 2400-2600rpm, more preferably 2450-2550rpm, most preferably 2500rpm; the stirring time is preferably 10-20min, more preferably 13-18min, most preferably 15min .

[0043] In the present invention, part of the mixed oil and the antioxidant are mixed, stirr...

Embodiment 1

[0050] a) 76kg 25# mineral oil, 19kg soybean oil (power frequency breakdown voltage of soybean oil: 73kV; 90℃ dielectric loss: 1.76%; 40℃ kinematic viscosity: 29.5mm 2 / s) and 5kg kinematic viscosity is 5.1mm 2 / s (40℃) of palm oil, put it in the same container, use a stirrer at room temperature and stir for 15 minutes at a rate of 2500r / min to obtain the mixed oil;

[0051] b) Mix 10kg of the mixed oil with 0.2kg T511 and 0.2kg L06 antioxidants, stir for 5 minutes, and place them at a constant temperature of 60°C for 24 hours to obtain a mother liquor containing antioxidants;

[0052] c) Mix the mother liquor containing antioxidants and the remaining 90kg of the mixed oil, stir for 30 minutes, and use a vacuum drying box to vacuum dry the mixed insulating oil with compound antioxidants for 48 hours to reduce the moisture of the mixed insulating oil to below 20ppm , Get ternary mixed insulating oil.

Embodiment 2

[0054] a) 75kg 25# mineral oil, 16kg soybean oil (power frequency breakdown voltage of soybean oil: 73kV; dielectric loss at 90°C: 1.76%; kinematic viscosity at 40°C: 29.5mm 2 / s) and 9kg kinematic viscosity is 5.1mm 2 / s (40℃) of palm oil, put it in the same container, use a stirrer at room temperature and stir for 15 minutes at a rate of 2500r / min to obtain the mixed oil;

[0055] b) Mix 10kg of the mixed oil with 0.2kg T511 and 0.2kg L06 antioxidants, stir for 5 minutes, and place them at a constant temperature of 60°C for 24 hours to obtain a mother liquor containing antioxidants;

[0056] c) Mix the mother liquor containing antioxidants and the remaining 90kg of the mixed oil, stir for 30 minutes, and use a vacuum drying box to vacuum dry the mixed insulating oil with compound antioxidants for 48 hours to reduce the moisture of the mixed insulating oil to below 20ppm , Get ternary mixed insulating oil.

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Abstract

The invention provides a ternary mixed insulation oil and a preparation method thereof. The ternary mixed insulation oil is prepared from base oil and an antioxidant with the mass ratio being 100:0.05to 0.4; the base oil is prepared from the components in percentage by mass: 10 to 25 percent of soybean oil, 3 to 10 percent of palm oil, and 70 to 87 percent of mineral oil; the antioxidant is selected from a phenolic oxidizing agent and / or an amine oxidizing agent. The ternary mixed insulation oil has lower kinematic viscosity and dielectric loss compared with traditional mixed insulation oil so as to have more superior heat dissipation performance, so that a transformer oil paper insulation system has lower operating temperature under the same operating load. The ternary mixed insulation oil has higher power frequency breakdown voltage. The ageing rate of the oil paper insulation system can be effectively retarded, the insulation life of oil paper insulation electrical equipment is prolonged, and the ternary mixed insulation oil has a more excellent environmental protection performance and oil paper insulation system matchability.

Description

Technical field [0001] The invention relates to the technical field of insulating oil, in particular to a ternary mixed insulating oil and a preparation method thereof. Background technique [0002] Power transformers play a central role in energy conversion in the process of power transmission and distribution in the power grid, and are the most important equipment in the safe operation of the power grid. Insulating oil is an important part of the transformer insulation system. It has the dual tasks of insulation and heat dissipation. It is used in a large amount in the transformer and plays a decisive role in the safe operation of the transformer. [0003] At present, insulating oil is mainly divided into mineral insulating oil, synthetic insulating oil, vegetable insulating oil and mixed insulating oil. Mineral oil has outstanding advantages such as low price, excellent insulation performance, low freezing point and low viscosity. It is the most widely used insulating oil in oi...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N30/02C10N40/16
CPCC10M169/04C10M2203/1006C10M2207/026C10M2207/401C10M2215/065C10N2030/02C10N2030/64C10N2040/16C10N2020/02
Inventor 郝建杨丽君廖瑞金李剑冯大伟王谦吴高林李帅张施令刘熊陈鑫成立赵学童
Owner CHONGQING UNIV
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