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Method used for removing corrosive sulfur in natural ester insulating oil

A technology of corrosive sulfur and insulating oil, applied in organic insulators, organic liquid insulators, refining with metal salts, etc., can solve problems such as transformer winding burnt, turn insulation breakdown, complex process, etc., to ensure safe operation and reduce operation The effect of saving maintenance cost and production cost

Inactive Publication Date: 2019-08-23
GUANGDONG JOOYN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the corrosive sulfur in the natural ester insulating oil in the prior art, it will chemically react with the copper wire during the operation of the transformer, and form Cu on the surface of the wire or the surface of the insulating paper. 2 S, the penetration and pollution of the wire insulation paper will gradually weaken the insulation strength of the wire, which will eventually lead to the breakdown of the turn insulation and the burning of the transformer winding. The invention provides a method for removing corrosive sulfur in natural ester insulating oil. The method has the advantages of simple operation and can completely remove corrosive sulfur in natural ester insulating oil without affecting the basic performance parameters of natural ester insulating oil. , has wide applicability in removing corrosive sulfur from natural ester insulating oil

Method used

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  • Method used for removing corrosive sulfur in natural ester insulating oil
  • Method used for removing corrosive sulfur in natural ester insulating oil
  • Method used for removing corrosive sulfur in natural ester insulating oil

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Embodiment 1: The removal method of corrosive sulfur in the natural ester insulating oil of the present invention

[0051] 1) Prepare 1% NaCl solution with deionized water, and preheat to the salt washing reaction temperature of 70-90°C.

[0052] 2) Add the 1% NaCl solution obtained in step 1) into the corrosive sulfur-containing natural ester insulating oil preheated to a salt washing reaction temperature of 70-90° C., and stir for 0.5-1.5 hours.

[0053] 3) The mixed solution obtained in step 2) is allowed to stand for stratification, and the lower aqueous solution is removed to obtain the upper natural ester insulating oil;

[0054] 4) Repeat steps 2) and 3) to obtain a natural ester insulating oil that removes corrosive sulfur salts.

[0055] 5) Add 70-90°C deionized water, wash with water the natural ester insulating oil obtained in step 4) at 70-90°C, stir and react for 0.5-1.5h.

[0056] 6) The mixed solution obtained in step 5) is allowed to stand for stratifi...

Embodiment 2

[0059] Embodiment 2: The removal method of corrosive sulfur in natural ester insulating oil

[0060] Prepare 1% CuCl with deionized water 2 solution, and preheated to the salt wash reaction temperature of 80°C, added to the corrosive sulfur-containing natural ester insulating oil preheated to the salt wash reaction temperature of 80°C, and stirred for 1 hour. The resulting mixed solution is left to stand for stratification, and the lower aqueous solution is removed to obtain the upper layer of natural ester insulating oil; after repeating the above-mentioned addition of salt and stirring to obtain the natural ester insulating oil that removes corrosive sulfur salts, add 80°C deionized water at 80°C to remove corrosive sulfur The natural ester insulating oil was washed with water, stirred and reacted for 1h. The mixed solution was left to stand for stratification, and the lower aqueous solution was removed to obtain the upper layer of natural ester insulating oil; repeated dei...

Embodiment 3

[0061] Example 3: The removal method of corrosive sulfur in natural ester insulating oil

[0062] Prepare a 1% NaCl solution with deionized water, preheat it to a salt wash reaction temperature of 70°C, add it to the corrosive sulfur-containing natural ester insulating oil preheated to a salt wash reaction temperature of 70°C, and stir for 0.5h. The resulting mixed solution is left to stand for stratification, and the lower aqueous solution is removed to obtain the upper layer of natural ester insulating oil; after repeating the above-mentioned addition of salt and stirring to obtain the natural ester insulating oil that removes corrosive sulfur salts, add 70°C deionized water at 90°C to remove corrosive sulfur The natural ester insulating oil was washed with water, and stirred for 1.5 hours. The mixed solution was left to stand for stratification, and the lower aqueous solution was removed to obtain the upper layer of natural ester insulating oil; repeated deionized water was...

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Abstract

The invention discloses a method used for removing corrosive sulfur in natural ester insulating oil. The method comprises following steps: deionized water is adopted to prepare a metal salt solution,the metal salt solution is pre-heated to 80 DEG C, and is added into 80 DEG C natural ester insulating oil containing corrosive sulfur, stirring reaction is carried out for 1h, an obtained mixture isallowed to stand for layering so as to obtain an upper layer natural ester insulating oil; the above step is repeated for a plurality of times so as to obtain a salt-containing natural ester insulating oil, 80 DEG C deionized water is added into the salt-containing natural ester insulating oil, stirring reaction is carried out for 1h, and another time of standing layering is carried out so as to obtain an upper layer water-containing natural ester insulating oil; the water-containing natural ester insulating oil is subjected to heating, pressure reduction, stirring, and drying, and is cooled to room temperature so as to obtain the corrosive sulfur free natural ester insulating oil. The method is capable of realizing rapid and effective removing of corrosive sulfur in natural ester insulating oil rapidly and effectively without changing the electrical performance of natural ester insulating oil, and ensuring natural ester insulating oil transformer safe operation.

Description

technical field [0001] The invention belongs to the field of natural ester insulating oil processing, and in particular relates to a method for removing corrosive sulfur in insulating oil. Background technique [0002] If there is corrosive sulfur in the transformer insulating oil, it will chemically react with the copper wire during the operation of the transformer, and Cu will form on the surface of the wire or the surface of the insulating paper. 2 S, Cu 2 S is a conductive substance, which penetrates and pollutes the insulating paper of the wire, gradually weakens the insulation strength of the wire, and eventually leads to the breakdown of the turn insulation and the burning of the transformer winding. In recent years, corrosive sulfur in electrical insulating oils has appeared one after another at home and abroad, causing the conductors or insulating materials of electrical equipment to form Cu 2 S caused by transformer coil burning accident. The commonly used inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/12H01B3/20H01F27/12
CPCC10G29/12H01B3/20H01F27/12
Inventor 黄飞杨渝杨曼陈斌万一
Owner GUANGDONG JOOYN NEW MATERIAL TECH CO LTD