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A treatment method for reducing the pour point of natural ester insulating oil

A treatment method and insulating oil technology, which is applied in the petroleum industry, lubricating compositions, etc., can solve the problems of affecting fire protection performance and lowering the ignition point of vegetable insulating oil, and achieve the effect of ensuring overall performance, good uniformity, and improving the degree of uniform dispersion

Active Publication Date: 2021-12-10
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have shown that if the mineral insulating oil content in vegetable insulating oil exceeds 10%, it will lead to a sharp drop in the ignition point of vegetable insulating oil, seriously affecting its fire performance, and cannot meet the requirements of IEC K-class liquid

Method used

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  • A treatment method for reducing the pour point of natural ester insulating oil
  • A treatment method for reducing the pour point of natural ester insulating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A processing method for reducing the pour point of natural ester insulating oil, comprising the following steps:

[0035] 1) Under the vacuum conditions of 60r / min and -0.096Mpa, the soybean insulating oil was heated to 65°C, and then the soybean insulating oil was subjected to short-term ultrasonic vibration treatment by means of "ultrasonic oscillation for 3 minutes and stop for 2 minutes". The ultrasonic power was 280W, and the ultrasonic Frequency 16kHz, ultrasonic treatment time 15min, continuous stirring 30min;

[0036] 2) Adjust the speed to 30r / min, vacuum cool the soybean insulating oil to 22°C, and keep stirring for 60min;

[0037] 3) Maintain the temperature difference between the cooling medium and the soybean insulating oil at 10°C, and cool the soybean insulating oil to 5°C at atmospheric pressure under the stirring condition of 5r / min for 10h;

[0038] 4) Keep the temperature difference between the cooling medium and the soybean insulating oil at 7°C, an...

Embodiment 2

[0042] A processing method for reducing the pour point of natural ester insulating oil, comprising the following steps:

[0043] 1) Under the vacuum conditions of 70r / min and -0.1Mpa, heat the rapeseed insulating oil to 70°C, and use the method of "ultrasonic oscillation for 3 minutes, stop for 3 minutes" to conduct short-term ultrasonic oscillation treatment on the soybean insulating oil. The ultrasonic power is 260W. Ultrasonic frequency 20kHz, ultrasonic treatment time 18min, continuous stirring 45min;

[0044] 2) Adjust the speed to 25r / min, vacuum-cool the rapeseed insulating oil to 20°C, and keep stirring for 70min;

[0045] 3) Maintain the temperature difference between the cooling medium and the rapeseed insulating oil at 8°C, and cool the rapeseed insulating oil to 4°C at atmospheric pressure under the stirring condition of 8r / min for 8 hours;

[0046] 4) Keep the temperature difference between the cooling medium and the rapeseed insulating oil at 5°C, and cool the r...

Embodiment 3

[0050] A processing method for reducing the pour point of natural ester insulating oil, comprising the following steps:

[0051] 1) Under the vacuum conditions of 65r / min and -0.098Mpa, heat the camellia seed insulating oil to 68°C, and then use the method of "ultrasonic oscillation for 2.5min, stop for 2.5min" to conduct short-term ultrasonic oscillation treatment on soybean insulating oil. 300W, ultrasonic frequency 16kHz, ultrasonic treatment time 20min; continuous stirring for 40min;

[0052] 2) Adjust the speed to 25r / min, vacuum-cool the camellia seed insulating oil to 18°C, and keep stirring for 65min;

[0053] 3) Maintain the temperature difference between the cooling medium and the camellia seed insulating oil at 10°C, and cool the camellia seed insulating oil to 3°C at normal pressure under the stirring condition of 6r / min for 10h;

[0054] 4) Keep the temperature difference between the cooling medium and the camellia seed insulating oil at 5°C, and cool the camelli...

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Abstract

The invention provides a treatment method for reducing the pour point of natural ester insulating oil, and belongs to the technical field of deep refining of natural ester insulating oil. A treatment method for lowering the pour point of natural ester insulating oil includes crystallization fractionation treatment and additive addition treatment. This method greatly reduces the content of high melting point glycerides and waxes in the natural ester insulating oil through crystallization and fractionation treatment, and effectively combines with additives to reduce the pour point of the natural ester insulating oil to below -25°C and maintain good physical and chemical properties. The electrical performance can meet the application requirements of natural ester insulating oil in most areas of our country. The invention has obvious technical advantages, strong applicability, simple technological process, low production cost, fully meets the technical requirements of industrial production, and has good technical transformation and implementation prospects.

Description

technical field [0001] The invention belongs to the technical field of deep refining of natural ester insulating oil, and in particular relates to a treatment method for reducing the pour point of natural ester insulating oil. Background technique [0002] Insulating oil is an important liquid insulating medium, mainly used in liquid-immersed high-voltage insulation equipment, such as liquid-immersed transformers, circuit breakers and transformers, etc., through impregnation and filling to eliminate the insulation air gap in electrical equipment, and play a role in insulation, The role of cooling and extinguishing the arc. Mineral insulating oil has good electrical insulation and cooling properties, and has been well used in electrical equipment. However, due to its low ignition point and poor biodegradability, it is not suitable for use in occasions with high fire safety and environmental protection requirements. [0003] As an environmentally friendly new type of high ign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M177/00C10M169/04C10N30/02C10N40/16
CPCC10M177/00C10M169/04C10M2207/025C10M2203/06C10M2207/283C10M2205/02C10M2207/40C10M2209/08C10M2205/04C10M2209/062C10M2209/086
Inventor 杨涛陈上吉王吉王震宇孙鹏蒲兵舰马建伟王天王伟周少珍张嵩阳赵磊
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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