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Treatment method for reducing dielectric loss of vegetable insulating oil

A technology of plant insulating oil and treatment method, which is applied in the field of reducing the dielectric loss of plant insulating oil, can solve the problems of increased conductance loss and oil conductance, and achieve the effects of sufficient contact, high activity and strong adsorption capacity

Inactive 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

Because microorganisms are rich in protein and have colloidal properties, the pollution of microorganisms to oil is actually a kind of pollution of microbial colloids, and microbial colloids are charged, which increases the conductance of oil, so the conductance loss also increases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The processing method of reducing the dielectric loss of vegetable insulating oil of the present embodiment comprises the following steps:

[0024] (1) Heat up rapeseed insulating oil with high dielectric loss (90°C dielectric loss value is 2.3%) to 55°C, add activated clay whose mass is 3% of vegetable oil mass, and stir and mix at 65r / min for 60min;

[0025] (2) After the oil temperature is cooled to 40°C under natural conditions, pump the activated clay mixed oil in step (1) into a vertical blade filter, and circulate and filter while maintaining stirring, and the filter time is 3 hours.

[0026] (3) Pump the filtered clear vegetable insulating oil into a vacuum dehydration tank, raise the temperature at 3°C / min to a final temperature of 65°C, keep the pressure in the tank below 100Pa, and carry out vacuum dehydration treatment on the vegetable insulating oil. 6h, and repeatedly pass through the 1μm filter element to further remove impurities during the cycle.

[00...

Embodiment 2

[0029] The processing method of reducing the dielectric loss of vegetable insulating oil of the present embodiment comprises the following steps:

[0030] (1) Raise the temperature of the soybean plant insulating oil to 45°C, add activated clay which accounts for 2% of the oil weight, keep the temperature constant, stir and mix, stir and mix at a speed of 60r / min for 40min, and make the activated clay and plant insulating oil The oil particles are in full contact;

[0031] (2) Cool down, when the oil temperature drops to 35°C, continue to stir at a speed of 60r / min, and at the same time, pump the plant insulating oil added with activated clay in step (1) into a vertical leaf filter for filtration, and circulate The fine filtration time is about 5 hours, and the colloidal impurities and white clay are filtered out to obtain clean vegetable insulating oil;

[0032] (3) Vacuum pump the clean vegetable oil obtained in step (2) into a vacuum dehydration tank, turn on the vacuum pu...

Embodiment 3

[0036] The processing method of reducing the dielectric loss of vegetable insulating oil of the present embodiment comprises the following steps:

[0037] (1) Heat up the olive oil plant insulating oil to 65°C, add 2% activated clay in the oil weight ratio, keep the temperature constant, stir and mix, and stir and mix at a speed of 70r / min for 80min to insulate the activated clay and the plant The oil particles of the oil are in full contact;

[0038] (2) Cool down. When the oil temperature drops to 43°C, continue to stir at a speed of 70r / min. At the same time, the vegetable insulating oil added with activated clay adsorbed in step (1) is pumped into a vertical blade filter for filtration, and the cycle The fine filtration time is about 6 hours, and the colloidal impurities and activated clay are filtered out to obtain clean vegetable insulating oil;

[0039] (3) Vacuum pump the clean vegetable oil obtained in step (2) into a vacuum dehydration tank, turn on the vacuum pump ...

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Abstract

The invention discloses a treatment method for reducing the dielectric loss of vegetable insulating oil. The treatment method comprises the following steps: 1, raising the temperature of the vegetable insulating oil to 45 DEG C to 65 DEG C, adding activated clay, and conducting stirring and mixing for 40-80 minutes, wherein the additive amount of the activated clay takes up 2-4% of the weight of the vegetable insulating oil; 2, lowering the temperature below 45 DEG C under the stirring condition, and then conducting cycling filtration on a mixture obtained in step 1; 3, placing the vegetable insulating oil obtained in step 2 into a dehydration pot, raising the temperature, and conducting the cycling dehydration for 4-6 hours till the content of water in the vegetable insulating oil is not greater than 30 mg / kg. By means of the treatment method, the dielectric loss of the vegetable insulating oil can be reduced to 0.3%.

Description

technical field [0001] The invention relates to the technical field of vegetable insulating oil, in particular to a treatment method for reducing dielectric loss of vegetable insulating oil. Background technique [0002] Vegetable insulating oil is a non-polluting, high-ignition liquid insulating medium with a biodegradation rate higher than 95%, an ignition point higher than 300°C, and a power frequency breakdown voltage of up to 70kV. Other physical, chemical and electrical properties can meet the needs of electric power plants. Oil requirements, is generally considered to be a good substitute for mineral insulating oil. European and American researchers represented by ABB and Cooper took the lead in developing commercially available vegetable insulating oil products, which have been widely used in distribution transformers. In my country, the State Grid Corporation and China Southern Power Grid Corporation have proposed the goal of green power grid construction, and are ...

Claims

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Application Information

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IPC IPC(8): C11B3/00C11B3/10
Inventor 李剑陆国俊王勇黄青丹宋浩永杨丽君廖瑞金
Owner GUANGZHOU POWER SUPPLY CO LTD
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