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Regeneration treatment method of waste transformer oil

A transformer oil and treatment method technology, applied in the direction of lubricating composition, etc., can solve the problems of unsmooth regeneration oil, resistance to popularization, lack of experience and operation mode, etc., and achieve the effect of low cost and efficient utilization

Active Publication Date: 2021-08-10
STATE GRID HUBEI ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a certain gap in the transformation and application of scientific research results, such as the lack of industrialization and standardization of complete sets of oil treatment equipment, some indicators of recycled oil are not up to the level of new oil, insufficient social awareness, and concerns based on reliability lead to resistance to promotion. etc.
[0005]How to carry out the collection, transportation, temporary storage and disposal of degraded transformer oil lacks experience and operation mode for reference; Unobstructed, it is necessary to carry out extensive research and explore business models

Method used

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  • Regeneration treatment method of waste transformer oil

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1: After filtering the transformer waste oil with a rotary filter, add concentrated sulfuric acid according to the acid-oil mass ratio of 1:30, stir and heat to 40°C, and stop stirring after 3 hours. Filter to obtain primary purified oil and acid residue, add magnesium oxide to the supernatant clear oil, the mass ratio of solid to oil is 1:30, stir evenly at 30°C, and stop stirring after 3 hours. Filter to obtain secondary purified oil and alkali residue. Adsorbent is added to the secondary purification oil, and after a period of time, it is filtered and vacuum dehydrated to obtain regenerated oil. The resulting alkali slag and acid slag are neutralized and roasted in a ratio of 1:1, and the roasting temperature is 600°C. After this treatment, the process does not produce harmful waste to the environment.

Embodiment 2

[0025] Example 2: After filtering the transformer waste oil with a rotary filter, add concentrated sulfuric acid according to the acid-oil mass ratio of 1:25, stir and heat to 40°C, and stop stirring after 4 hours. Filter to obtain primary purified oil and acid residue, add magnesia to the supernatant clear oil with a solid-oil mass ratio of 1:25, stir evenly at 30°C, and stop stirring after 3 hours. Filter to obtain secondary purified oil and alkali residue. Adsorbent is added to the secondary purification oil, and after a period of time, it is filtered and vacuum dehydrated to obtain regenerated oil. The resulting alkali slag and acid slag are neutralized and roasted in a ratio of 1:1, and the roasting temperature is 650°C.

Embodiment 3

[0026] Example 3: After filtering the transformer waste oil with a rotary filter, add concentrated sulfuric acid according to the acid-oil mass ratio of 1:20, stir and heat to 30°C, and stop stirring after 5 hours. Filter to obtain primary purified oil and acid residue, add magnesium carbonate to the supernatant clear oil, the solid-oil mass ratio is 1:30, stir evenly at room temperature, stop stirring after 3 hours. Filter to obtain secondary purified oil and alkali residue. Adsorbent is added to the secondary purification oil, and after a period of time, it is filtered and vacuum dehydrated to obtain regenerated oil. The resulting alkali slag and acid slag are neutralized and roasted in a ratio of 1:1, and the roasting temperature is 600°C.

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Abstract

The invention provides a regeneration treatment method of waste transformer oil, which comprises the steps of filtering oil discharged from a transformer by using a filter to obtain clarified waste transformer oil; reacting concentrated sulfuric acid and waste transformer oil according to a certain ratio, standing for layering, taking supernatant as primary purified oil, taking acidic waste liquid as a lower layer, and taking the primary purified oil as low-voltage-grade transformer oil; mixing and stirring the primary purified oil and alkaline solid powder, and filtering to obtain secondary purified oil; mixing alkaline solid powder obtained by filtering with an acidic waste liquid, and after complete reaction, roasting to remove organic matters so as to obtain an inorganic salt product; and treating the secondary purified oil with an adsorbent to obtain tertiary purified oil, and carrying out vacuum dehydration on the tertiary purified oil to obtain regenerated oil which is used for high-voltage-grade transformer oil. The method disclosed by the invention is green, environment-friendly, efficient and low in cost, does not generate new pollutants, and really achieves the purposes of turning waste into wealth and recycling and efficiently utilizing resources.

Description

technical field [0001] The invention relates to the technical field of oil regeneration and provides a regeneration treatment method for waste transformer oil. Background technique [0002] With the sustained and rapid development of the national economy and the improvement of people's living standards, the scale of power grid construction is also developing rapidly, and the natural resources required for power production and operation are increasing. There are many challenges. [0003] The scale of power grid construction continues to grow, the number of oil-filled equipment in the power grid is increasing year by year, and the demand for oil is increasing. At present, there are more than 1,000 substations with a voltage level of 110 kV and above in Hubei Province, and the total amount of insulating oil in the equipment is about 100,000 tons. The annual transformer oil used in the operation and maintenance or replacement of equipment is about 1,000 tons. With the continuou...

Claims

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Application Information

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IPC IPC(8): C10M175/00
CPCC10M175/0008C10M175/0016C10M175/0058Y02W30/74
Inventor 蔡萱张驰瞿子涵吕仁亮夏婷沈浩黄茜
Owner STATE GRID HUBEI ELECTRIC POWER RES INST
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