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Solid alkali adsorbent and method for regenerating performance of natural ester insulating oil after operation

An adsorbent and solid alkali technology, which is applied in the field of solid alkali adsorbent and natural ester insulating oil performance regeneration after operation, can solve the chemical indicators that affect the acid value and water content of natural ester insulating oil, and affect the impact of natural ester insulating oil Breakthrough voltage and volume resistivity, affecting the safety performance of vegetable oil transformers, etc., to achieve good performance recovery, excellent recovery effect, easy to achieve

Active Publication Date: 2020-08-25
STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the use of natural ester insulating oil, due to problems such as partial discharge and high temperature, natural ester insulating oil will undergo some decomposition during use, and the decomposed impurities Most of them are conductive substances. These conductive substances will affect the chemical indicators such as acid value and water content of natural ester insulating oil, and also affect the electrical properties such as breakdown voltage and volume resistivity of natural ester insulating oil, which will greatly affect the natural ester insulating oil. Affect the safety performance of vegetable oil transformers, thereby affecting the stability of the power transmission process, while the price of natural ester insulating oil is still relatively expensive at the current stage, and a large number of replacements will cause high cost waste

Method used

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  • Solid alkali adsorbent and method for regenerating performance of natural ester insulating oil after operation
  • Solid alkali adsorbent and method for regenerating performance of natural ester insulating oil after operation
  • Solid alkali adsorbent and method for regenerating performance of natural ester insulating oil after operation

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Effect test

Embodiment 1

[0049] Preparation of solid alkali adsorbent: mix the powders of calcium oxide, magnesium carbonate, sodium silicate, and talcum powder according to the mass ratio of 5:3:1:1, put them into a ball mill to grind until they are completely mixed, and then put them into a muffle furnace for calcination. The calcination temperature is 500° C., the calcination time is 7 hours, and the ball mill is used after cooling.

[0050] Forming of solid alkali adsorbent: mix the ground powder with 10% polyvinyl alcohol solution, mix it into a hard mud, put it into a mold and press it into a certain shape, and then follow a certain calcination rate of 5°C / min to 900°C, keep warm for 3 hours, and take out the adsorbent after cooling.

Embodiment 2

[0052] Preparation of solid alkali adsorbent: mix the powders of calcium oxide, magnesium carbonate, sodium silicate, and talcum powder according to the mass ratio of 4:3:1:1, put them into a ball mill to grind until they are completely mixed, and then put them into a muffle furnace for calcination. The calcination temperature is 450° C., the calcination time is 6 hours, and the ball mill is used after cooling.

[0053] Forming of solid alkali adsorbent: mix the ground powder with 10% polyvinyl alcohol solution, mix it into a hard mud, put it into a mold and press it into a certain shape, and then follow a certain calcination rate of 4°C / min to 850°C, keep warm for 3 hours, and take out the adsorbent after cooling.

Embodiment 3

[0055] The natural ester insulating oil regeneration device includes a reactor 1, an adsorbent filling layer 2 is arranged inside the reactor 1, a filter layer 6 is arranged inside the reactor 1, and the filter layer 6 is arranged at the bottom of the adsorbent filling layer 2 , the reactor 1 is provided with an oil inlet 4, and the oil inlet 4 is arranged above the adsorbent packing layer 2. A stirring device 7 is arranged inside the reactor 1 , and the stirring device 7 is arranged below the filter net layer 6 . The regeneration device also includes an operating oil storage device 3 , the oil outlet of the operating oil storage device 3 is connected to the oil inlet of the reactor 1 .

[0056] The bottom of the reactor 1 is provided with an oil outlet 5 , and the oil outlet is located below the filter layer 6 .

[0057] The filter mesh layer 6 can be a metal mesh layer. The operating oil storage device 3 can be an oil storage tank or other devices that can store natural es...

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Abstract

The invention relates to a solid alkali adsorbent and a method for regenerating the performance of natural ester insulating oil after operation. The solid alkali adsorbent comprises calcium oxide, magnesium carbonate, sodium silicate and talcum powder. The natural ester insulating oil can adsorb acidic substances and moisture of the natural ester insulating oil, most of conductive substances in the natural ester insulating oil after operation are separated, the insulating property of the natural ester insulating oil is fully improved, and regeneration of the natural ester insulating oil is realized. The preparation method of the adsorbent comprises the following steps: mixing the raw materials, pre-calcining the mixed raw materials, carrying out compression molding after pre-calcining, andcalcining; mixing and adsorbing the natural ester insulating oil and a solid alkali adsorbent, and separating to obtain regenerated natural ester insulating oil. The performance of the regenerated natural ester insulating oil meets the use standard. The adsorption treatment method does not introduce impurities and can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of performance restoration and regeneration of electrical equipment materials, and in particular relates to a solid alkali adsorbent and a method for regenerating the performance of natural ester insulating oil after operation. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the continuous increase of power generation and transmission scale, the electricity consumption is constantly rising, and the construction scale of power transmission sites such as substations is constantly increasing. The scale of production and construction of transformers is also expanding. Natural ester insulating oil has th...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30C10M175/00B01J19/24B01J19/18B01J19/00B01D15/10C10N40/16
CPCB01J20/041B01J20/043B01J20/10C10M175/0008C10M175/0016B01J19/0053B01J19/0066B01J19/18B01J19/24B01D15/10B01J2220/4806B01J2220/42
Inventor 杨晶晶吕学斌许子涛王敬海马金亮张阳冯树辉王磊孙延栋李明明王东晖赵琳
Owner STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY
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