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Method for reducing dielectric loss factor of dielectric oil

A technology of dielectric loss factor and loss factor, applied in separation methods, chemical instruments and methods, petroleum industry, etc., can solve the problems of high dielectric loss factor, achieve high vacuum pressure, improve interfacial tension and volume resistivity, and reduce dielectric loss Factor effect

Inactive Publication Date: 2018-12-14
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention discloses a method for reducing the dielectric loss factor of insulating oil, which can effectively solve the technical defect that the current transformer insulating oil has an excessively high dielectric loss factor after long-term use

Method used

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  • Method for reducing dielectric loss factor of dielectric oil
  • Method for reducing dielectric loss factor of dielectric oil
  • Method for reducing dielectric loss factor of dielectric oil

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Embodiment 1

[0045]The embodiment of the present invention provides the first kind of specific implementation mode, take No. 1 power supply bureau insulating oil (old oil) and carry out the first stage molecular distillation, the temperature of the first stage molecular distillation is 50 ℃, the vacuum of the first stage molecular distillation The pressure is 10Pa, the feed rate of the first stage molecular distillation is 15Kg / h, and the first stage molecular distillation insulating oil can be obtained. The first stage molecular distillation can remove the substances with low boiling point in the insulating oil (old oil) and provide First-stage molecular distillation preheating; the first-stage molecular distillation insulating oil is subjected to second-stage molecular distillation, the temperature of the second-stage molecular distillation is 175°C, the vacuum pressure of the second-stage molecular distillation is 2Pa, and the feedstock of the second-stage molecular distillation The spee...

Embodiment 2

[0049] The embodiment of the present invention provides a second specific implementation mode. The insulating oil (old oil) of the No. 2 power supply bureau is used for the first-stage molecular distillation. The temperature of the first-stage molecular distillation is 100°C. The pressure is 25Pa, the feed rate of the first stage molecular distillation is 15Kg / h, and the first stage molecular distillation insulating oil can be obtained. The first stage molecular distillation can remove the substances with low boiling points in the insulating oil (old oil) and provide First-stage molecular distillation preheating; the first-stage molecular distillation insulating oil is subjected to second-stage molecular distillation, the temperature of the second-stage molecular distillation is 180°C, the vacuum pressure of the second-stage molecular distillation is 1Pa, and the feed of the second-stage molecular distillation The speed is 15Kg / h, and the insulating oil with low dielectric loss...

Embodiment 3

[0054] The embodiment of the present invention provides a third specific implementation mode. The insulating oil (old oil) of the No. 3 power supply bureau is used for the first-stage molecular distillation. The temperature of the first-stage molecular distillation is 150° C., and the vacuum Pressure is 50Pa, under the condition of the feeding speed of first-order molecular distillation 15Kg / h, obtain first-order molecular distillation insulating oil, the material with low boiling point in insulating oil (old oil) is removed, and prepare for the second-stage molecular distillation Heat; the temperature of the second-stage molecular distillation is 185°C, the vacuum pressure of the second-stage molecular distillation is 2Pa, and the feed rate of the second-stage molecular distillation is 15Kg / h, so as to obtain insulating oil with low dielectric loss factor. The distilled insulating oil is collected separately through the light component tank and the heavy component tank, and th...

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Abstract

The inventionbelongs to the technical field of electrical equipment, and in particular relates to a method for reducing the dielectric loss factor of dielectric oil. The method provided by the invention comprises the following steps: step 1, performing first-order molecular distillation on the dielectric oil to obtain first-order molecular distillation dielectric oil; and step 2, performing second-order molecular distillation on the first-order molecular distillation dielectric oil to obtain dielectric oil with the low dielectric loss factor, wherein the dielectric loss factor of the dielectric oil is greater than 0.01. The method for reducing the dielectric loss factor of the dielectric oil, disclosed in the invention, can be used for effectively overcoming a technical defect in the priorart that the dielectric loss factor of the dielectric oil in a transformer is over high after the dielectric oil in the transformer is used for a long time.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment, and in particular relates to a method for reducing the dielectric loss factor of insulating oil. Background technique [0002] Insulating oil is a type of lubricating oil. It is usually prepared by adding antioxidants to highly refined lubricating base oils. It is mainly used as a dielectric for electrical equipment. As an important liquid insulating medium, transformer insulating oil can improve the electrical insulation strength of the equipment and improve the heat dissipation performance of the equipment in oil-immersed insulation high-voltage power transmission and transformation equipment such as transformers, circuit breakers, current and voltage transformers, and bushings. In recent years, the demand for transformer oil in my country has grown rapidly. It is estimated that the market demand for main transformer transformer oil will increase from 400,000 tons per year to 1.6 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/14B01D3/12C10M177/00
CPCB01D3/12B01D3/143C10M177/00C10N2040/16
Inventor 钱艺华赵耀洪陈天生夏启斌吴坚
Owner GUANGDONG POWER GRID CO LTD
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