Method for preparing transformer oil from edible vegetable oil

A technology of edible vegetable oil and transformer oil, applied in the field of transformer oil, can solve problems such as unreachable, achieve the effects of maintaining electrical performance, easy and controllable and simple operation, and reducing alkali refining time

Inactive Publication Date: 2017-05-10
ANHUI KAIAO NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing vegetable oil preparation of transformer oil requires an acid value of at least 0.03mgKOH / g, but the traditional preparation process cannot achieve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of edible vegetable oil that the present invention proposes prepares the method for transformer oil, comprises:

[0030] S1, the rapeseed oil is warmed up to 30 DEG C, under the stirring of 40r / min rotating speed, drip the lye that concentration is 20wt%, the consumption of described lye is 0.33wt% of rapeseed oil, finish dropwise within 10min, Continue to heat up to 70°C, stir at a speed of 50r / min for 15min, then stir at a speed of 20r / min for 35min, cool and let it stand for 5h, and separate the saponins to obtain the primary product of alkali refining;

[0031]S2. Raise the temperature of the initial alkali refining product obtained in S1 to 70°C, add soft water with a temperature of 60°C under stirring, the amount of soft water is 20wt% of the rapeseed oil, complete adding water within 15min, continue to heat up to 100°C, and Stir at a speed of 50r / min for 20min, let stand for 3h after cooling, and obtain the primary product of water-washed oil after oil-wat...

Embodiment 2

[0036] A kind of edible vegetable oil that the present invention proposes prepares the method for transformer oil, comprises:

[0037] S1, rapeseed oil is heated up to 50 ℃, under the stirring of 20r / min rotating speed, drip the lye that concentration is 30wt%, the consumption of described lye is 0.28wt% of rapeseed oil, finish dropwise within 15min, Continue to heat up to 55°C, stir at a speed of 70r / min for 5min, then stir at a speed of 40r / min for 25min, cool and let stand for 8h, separate the saponins and obtain the primary product of alkali refining;

[0038] S2. Raise the temperature of the initial alkali refining product obtained in S1 to 50°C, add soft water with a temperature of 80°C under stirring, the amount of soft water is 15wt% of the rapeseed oil, complete adding water within 25min, continue to heat up to 80°C, and Stir at a speed of 70r / min for 10min, let stand for 6h after cooling, and obtain the primary product of water-washed oil after oil-water separation; ...

Embodiment 3

[0043] A kind of edible vegetable oil that the present invention proposes prepares the method for transformer oil, comprises:

[0044] S1. Heat up the peanut oil to 30°C, add dropwise a lye with a concentration of 25wt% under stirring at a rotating speed of 35r / min, the amount of the lye is 0.31wt% of the peanut oil, complete the dropwise addition within 12min, and continue to heat up to 65°C, Stir at a speed of 55r / min for 10min, then stir for 35min at a speed of 25r / min, let stand for 6h after cooling, and obtain the primary product of alkali refining after separating the saponins;

[0045] S2. Raise the temperature of the initial alkali refining product obtained in S1 to 65°C, add soft water with a temperature of 65°C under stirring, the amount of soft water is 17wt% of the peanut oil, complete adding water within 20 minutes, continue to heat up to 95°C, and use 55r / min Stir at a rotating speed for 15 minutes, let stand for 4 hours after cooling, and obtain the primary prod...

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Abstract

The invention discloses a method for preparing transformer oil from edible vegetable oil. The method includes: heating the edible vegetable oil, dropwise adding alkali liquid, continuing heating and stirring, cooling, standing, and separating out saponin; adding soft water, continuing heating and stirring, cooling, standing, performing oil-water separation, and heating; adding soft water while stirring, cooling, standing, and performing oil-water separation and vacuum dewatering; adding activated clay, stirring, filtering, heating, and pumping into a deacidifying tower for deacidifying; cooling after oil discharge, and filtering to obtain the transformer oil. The method for preparing the transformer oil from the edible vegetable oil is simple in technical operation and mild in condition, and the transformer oil prepared according to the method is much smaller than 0.03mgKOH / g in acid value and is excellent in low-temperature fluidity, light in color and great in electrical performance.

Description

technical field [0001] The invention relates to the technical field of transformer oil, in particular to a method for preparing transformer oil from edible vegetable oil. Background technique [0002] At present, transformer oil mainly adopts mineral oil and synthetic oil. However, mineral oil has a low flash point and poor biodegradability, and is a non-renewable resource; synthetic oil is expensive, cannot be completely biodegraded, and even contains toxicity, so its use is restricted in certain occasions. Vegetable oil can replace non-renewable mineral oil in terms of insulation performance and environmental protection, and can replace synthetic oil in terms of cost, biodegradability and raw material sources. It is a new type of green transformer oil that has no negative impact on the ecological environment. Edible vegetable oil has a high ignition point, which is higher than 300°C. It is a renewable resource and can be almost completely biodegraded. Its electrical prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M109/02C10M177/00C11B3/00C11B3/06C11B3/10
CPCC10M109/02C10M177/00C10M2207/401C11B3/001C11B3/008C11B3/06C11B3/10
Inventor 朱震高灿奇
Owner ANHUI KAIAO NEW ENERGY CO LTD
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