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Improved processing method of plant insulating oil

A technology of vegetable insulating oil and treatment method, applied in the field of improved treatment of vegetable insulating oil, can solve the problems of low oxidation stability, no longer applicable, large kinematic viscosity and density, etc.

Active Publication Date: 2015-10-21
GUANGZHOU POWER SUPPLY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, plant insulating oil triglyceride molecules contain a large number of carbon-carbon double bonds and triple bonds, and the energy of carbon-carbon double bonds and triple bonds is lower than that of benzene ring double bonds and carbon-carbon single bonds in mineral insulating oil alkane molecules. bond energy, so vegetable insulating oil has high reactivity and oxidation stability is significantly lower than mineral insulating oil
In addition, vegetable insulating oil has relatively high kinematic viscosity and density, which further increases the difficulty of precipitation of water molecules and impurity particles in the oil
Therefore, the traditional methods for treating moisture and impurities in mineral insulating oils will no longer be applicable to new plant insulating oils, and it is urgent to develop a new treatment method for plant insulating oils

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of improved processing method of vegetable insulating oil of the present embodiment, comprises the steps:

[0037] (1) The rapeseed oil plant insulating oil is pumped into the coalescence dehydration tank at 0.5L / s by a vacuum pump. At this moment, the water in the rapeseed oil plant insulating oil is in a saturated dissolved state, and the water content in the oil is ≤5%; Seed oil and vegetable insulating oil are circulated in the coalescing dehydration tank at a temperature of 25°C. At the same time, there is a filter in the coalescing dehydration tank with a pore size of 5 μm, and the cycle treatment time is about 3 hours. The oil can be removed through circulation. Partial moisture and impurities; the moisture in rapeseed oil plant insulating oil can be reduced to below 900mg / kg, which plays a role in preliminary filtering of impurities in the oil;

[0038] (2) Vacuum dehydration treatment of rapeseed oil plant insulating oil: vacuum pump the rapeseed oil pla...

Embodiment 2

[0042] A kind of improved processing method of vegetable insulating oil in the present embodiment, comprises the steps:

[0043](1) The soybean oil vegetable insulating oil is pumped into the coalescence dehydration tank by a vacuum pump at 0.5L / s. At this moment, the moisture in the soybean oil vegetable insulating oil is in a saturated dissolved state, and the moisture content in the oil is ≤5%; the soybean oil vegetable The insulating oil is circulated in the coalescing dehydration tank at a temperature of 25°C. At the same time, there is a filter in the coalescing dehydration tank with a pore size of 5 μm, and the cycle treatment time is about 3 hours. Part of the water and water in the oil can be removed through circulation. Impurities; the moisture in vegetable insulating oil can be reduced to less than 900mg / kg, which plays a role in preliminary filtering of impurities in the oil;

[0044] (2) Carry out vacuum dehydration treatment on soybean oil plant insulating oil: v...

Embodiment 3

[0048] A kind of improved processing method of vegetable insulating oil in the present embodiment, comprises the steps:

[0049] (1) The rapeseed oil plant insulating oil is pumped into the coalescence dehydration tank at 0.5L / s by a vacuum pump. At this moment, the water in the rapeseed oil plant insulating oil is in a saturated dissolved state, and the water content in the oil is ≤5%; Seed oil plant insulating oil is circulated in the coalescing dehydration tank at a temperature of 35°C. At the same time, there is a filter in the coalescing dehydration tank with a pore size of 5 μm, and the cycle treatment time is about 5 hours. The oil can be removed through circulation. Partial moisture and impurities; the moisture in rapeseed oil plant insulating oil can be reduced to below 900mg / kg, which plays a role in preliminary filtering of impurities in the oil;

[0050] (2) Vacuum dehydration treatment of rapeseed oil plant insulating oil: vacuum pump the rapeseed oil plant insula...

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Abstract

The invention discloses an improved processing method of plant insulating oil. The method includes the first step of coalescence dewatering, the second step of vacuum dewatering and the third step of vacuum mixing and refined filtering so that plant insulating oil can be obtained. The water content of the plant insulating oil processed through the improved processing method is smaller than 50 mg / kg, and 100 ml oil contains 2000 or less of impurity particles with diameter larger than 5 microns.

Description

technical field [0001] The invention relates to the technical field of vegetable insulating oil, in particular to an improved processing method of vegetable insulating oil. Background technique [0002] Vegetable insulating oil is a green and environmentally friendly liquid dielectric, which is generally considered to be a good substitute for mineral insulating oil. Tens of thousands of vegetable insulating oil distribution transformers have been in operation in the United States so far. Moreover, researchers from Cooper Corporation of the United States have begun to study the application of 1000kV vegetable insulating oil transformers. In my country, the State Grid Corporation of China and China Southern Power Grid Corporation have proposed the goal of green power grid construction. The first plant insulating oil distribution transformer with independent intellectual property rights in China was put into operation in Henan Power Grid Corporation in 2010. China Southern Pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00C11B3/02
Inventor 陆国俊李剑王勇黄青丹宋浩永杨丽君廖瑞金
Owner GUANGZHOU POWER SUPPLY CO LTD
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