CN104450149A - Method for extracting particulate matter from transformer oil - Google Patents
Method for extracting particulate matter from transformer oil Download PDFInfo
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- CN104450149A CN104450149A CN201410787149.9A CN201410787149A CN104450149A CN 104450149 A CN104450149 A CN 104450149A CN 201410787149 A CN201410787149 A CN 201410787149A CN 104450149 A CN104450149 A CN 104450149A
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Abstract
The invention relates to a method for extracting particulate matter from transformer oil. The method comprises the following steps: mixing petroleum ether with transformer oil in a volume ratio of 1:1, filtering through a suction filter, and then extracting particulate matter. Compared with the prior art, the method can be used for determining the total amount of particulate matter with size being 0.45 micron in the transformer oil instead of distribution of granularity. According to the invention, a 0.45-micron filter membrane is used for intercepting matter with aperture of larger than 0.45 micron, the matter is washed by petroleum ether, and thus a later composition test of the particulate matter is easy and feasible.
Description
Technical field
The present invention relates to transformer oil handling, be specifically related to the method that in transformer oil, particulate matter is extracted.
Background technology
Pure transformer oil insulating property are good, if there is impurity, its insulating property can decline greatly.When there is metal macrobead in transformer oil, although number is little, compared with molecule, even more serious on the impact of transformer oil insulating property.Macrobead in oil under electric field action is one of principal element producing shelf depreciation.
There is the abnormal operating conditions such as hot or electric discharge property when oil-filled electric equipment, and all can make the metallic corrosion of associate components, melting loss in oil, cause metal content and granularity in oil to rise.When the metal content in oil or granule foreign are too much, then the static discharge that can cause oil flow electrification and be produced by it, will threaten the safe operation of transformer.
Current operating transformer oil main test granularity, granularity index as: 500kV and above AC transformer oil particles degree should control: the granule number being greater than 5 microns before putting into operation in (after hot oiling) 100mL oil is less than or equal to 2000, and the granule number being greater than 5 microns during operation in (after overhaul) 100mL oil is less than or equal to 3000; Before 500kV and above DC converter transformer put into operation, (after hot oiling) granularity should control: the granule number being greater than 5 microns in 100mL oil is less than or equal to 1000.And the composition not requirement of concrete particulate matter, and general with 5 microns for boundary.
In the prior art, usually according to granularity, running condition is judged for transformer oil, but the consequence in fact caused for dissimilar particulate matter (metal or nonmetal) is distinguished comparatively large, and for being less than the particulate matter more not put forward the methods of 5 microns.
Utility model patent CN203721430U discloses a kind for the treatment of system that transformer oil dielectric loss value is reduced, comprise vacuum oil-filter and the absolute oil tank, oil pump and the strainer that are connected by piping loop successively, be communicated with separately between described vacuum oil-filter and absolute oil tank, also comprise heater oil and dielectric loss treatment tank, described well heater and oily dielectric loss treatment tank are series between described oil pump and strainer successively.Well heater is adopted to heat the transformer oil entering oily dielectric loss treatment tank, to improve the adsorption treatment ability of oily dielectric loss treatment tank to pollutent in transformer oil, by oily dielectric loss treatment tank, the transformer oil flowed through is processed, thus oil pipeline is adsorbed thoroughly and clears up.Because transformer oil viscosity is large, the program mainly utilizes well heater to heat by oil, but cost adds, and oil is difficult to maintain in certain temperature after the pipeline of long length, and therefore treatment effect is undesirable.
Summary of the invention
Object of the present invention is exactly provide to overcome defect that above-mentioned prior art exists the method that particulate matter in the transformer oil that a kind of method is simple, cost is low, effective is extracted.
Object of the present invention can be achieved through the following technical solutions: a kind of method that in transformer oil, particulate matter is extracted, and it is characterized in that, the method is after being mixed according to volume ratio 1:1 with transformer oil by sherwood oil, after Suction filtration device is filtered, extract particulate matter.
Described sherwood oil chooses boiling point range at the sherwood oil of 60 ~ 90 DEG C, the membrane filtration of this sherwood oil first through 0.22 μm of aperture before mixing with transformer oil.
Described transformer oil mixes with sherwood oil after 30 minutes 60 DEG C of heating again.
Described Suction filtration device is placed 0.45 μm of filter membrane of constant weight in advance.
Described filter membrane is the cellulose acetate film being not dissolved in oil.
Described Suction filtration device filter after sherwood oil and the mixture of transformer oil sherwood oil to be volatilized the transformer oil namely obtained totally totally.
Particulate matter after described Suction filtration device filtration carries out composition detection after petroleum ether.
The present invention is directed to the larger feature of transformer oil viscosity, select sherwood oil to mix with oil, by membrane filtration, the particulate matter be trapped on filter membrane is the result that needs obtain.Sherwood oil chooses 60 ~ 90 DEG C of scopes (for subsequent use after the membrane filtration in 0.22 μm of aperture in advance); Filter membrane is not the cellulose acetate film (0.45 μm, aperture) of oil dissolving; Sherwood oil mixes (volume ratio) in 1:1 ratio with transformer oil; Filter type is suction filtration.Compared with prior art, the present invention has the following advantages:
1, present method can measure the medium and small particulate matter total amount to 0.45 μm of transformer oil, instead of the distribution of granularity;
2, present method chooses the filter membrane of 0.45 μm is retain the material in oil more than this aperture, and through petroleum ether, and the later composition test of particulate matter can be more simple.
Embodiment
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1 ~ 4
A kind of method that in transformer oil, particulate matter is extracted:
The first step: get sherwood oil for subsequent use after the filter membrane suction filtration in 0.22 μm of aperture;
Second step: the heating of 60 DEG C, transformer oil, taking-up after 30 minutes, recording quality, fully mixes in 1:1 ratio with sherwood oil, obtains good mobility to reduce viscosity;
3rd step: Suction filtration device placed 0.45 μm of filter membrane of constant weight in advance and clamp;
4th step: the mixture suction filtration pouring transformer oil and sherwood oil in the upper cup of Suction filtration device into:
5th step: rinse upper cup with sherwood oil after having filtered and sherwood oil volatilized clean;
6th step: constant weight filter membrane recording quality, and the content of the particulate matter that converts, and the particulate matter on filter membrane can do composition detection further.
Table 1 different size filter membrane filtering thing detected result
| Filter membrane specification | Particle content (%) |
| 0.10μm | 0.0060 |
| 0.45μm | 0.0050 |
| 0.8μm | 0.0026 |
| 3.0μm | 0.0008 |
As can be seen from Table 1, after the filter membrane filter of different pore size, detected result is different, and along with the increase in aperture, the particulate matter on filter membrane constantly reduces, and is namely inversely proportional to filter sizes.But in process of the test, find the filter membrane comparatively hard-pumped filter of 0.10 μm, even if cut back product is also filtered after strengthening dilution ratio and is also needed for a long time, and well can not ensure the pollution problem that long-time suction filtration brings due to environmental air quality, and the restriction of test period, think that the filter membrane choosing 0.45 μm of aperture is comparatively suitable.When filter sizes is larger, the particulate matter filtered out is incomplete, still can have an impact to transformer.
Employing aforesaid method extracts the particulate matter in different transformer oil, and the composition of gained particulate matter is as follows:
Table 2 particulate matter quantitative result
The constituent content that table 2 measures for the particulate matter be trapped on filter membrane.
Claims (7)
1. the method that in transformer oil, particulate matter is extracted, it is characterized in that, the method is after being mixed according to volume ratio 1:1 with transformer oil by sherwood oil, after Suction filtration device is filtered, extract particulate matter.
2. the method that in transformer oil according to claim 1, particulate matter is extracted, is characterized in that, described sherwood oil chooses boiling point range at the sherwood oil of 60 ~ 90 DEG C, and this sherwood oil is the membrane filtration of elder generation through 0.22 μm of aperture before mix with transformer oil.
3. the method that in transformer oil according to claim 1, particulate matter is extracted, is characterized in that, described transformer oil mixes with sherwood oil after 30 minutes 60 DEG C of heating again.
4. the method that in transformer oil according to claim 1, particulate matter is extracted, is characterized in that, described Suction filtration device is placed 0.45 μm of filter membrane of constant weight in advance.
5. the method that in transformer oil according to claim 4, particulate matter is extracted, is characterized in that, described filter membrane is the cellulose acetate film being not dissolved in oil.
6. the method that in transformer oil according to claim 1, particulate matter is extracted, is characterized in that, described Suction filtration device filter after sherwood oil and the mixture of transformer oil sherwood oil to be volatilized the transformer oil namely obtained totally totally.
7. the method that in transformer oil according to claim 1, particulate matter is extracted, is characterized in that, the particulate matter after described Suction filtration device filtration carries out composition detection after petroleum ether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410787149.9A CN104450149B (en) | 2014-12-17 | 2014-12-17 | A kind of method that particulate matter is extracted in transformer oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410787149.9A CN104450149B (en) | 2014-12-17 | 2014-12-17 | A kind of method that particulate matter is extracted in transformer oil |
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| CN104450149A true CN104450149A (en) | 2015-03-25 |
| CN104450149B CN104450149B (en) | 2017-09-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268020A (en) * | 2016-09-29 | 2017-01-04 | 广东电网有限责任公司电力科学研究院 | A kind of filter the technique of fiber grain in transformer oil |
| CN112924317A (en) * | 2020-12-30 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | Method for measuring content of free carbon in transformer oil |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HK1113636A2 (en) * | 2007-08-24 | 2008-10-10 | Dunwell Engineering Co Ltd | Vibrating membrance micro-filtration of used oil |
| CN101614656B (en) * | 2008-06-27 | 2012-05-02 | 上海宝钢工业检测公司 | Quantitative analysis method for iron particles and organic iron in lubricating oil in use |
| CN103185686B (en) * | 2011-12-30 | 2016-08-03 | 华东电力试验研究院有限公司 | Particulate matter component assay method in transformer oil |
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2014
- 2014-12-17 CN CN201410787149.9A patent/CN104450149B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268020A (en) * | 2016-09-29 | 2017-01-04 | 广东电网有限责任公司电力科学研究院 | A kind of filter the technique of fiber grain in transformer oil |
| CN112924317A (en) * | 2020-12-30 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | Method for measuring content of free carbon in transformer oil |
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| CN104450149B (en) | 2017-09-29 |
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