CN104450149B - A kind of method that particulate matter is extracted in transformer oil - Google Patents
A kind of method that particulate matter is extracted in transformer oil Download PDFInfo
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- CN104450149B CN104450149B CN201410787149.9A CN201410787149A CN104450149B CN 104450149 B CN104450149 B CN 104450149B CN 201410787149 A CN201410787149 A CN 201410787149A CN 104450149 B CN104450149 B CN 104450149B
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Abstract
The present invention relates to the method that particulate matter in a kind of transformer oil is extracted, this method is according to volume ratio 1 by petroleum ether and transformer oil:After 1 mixing, particulate matter is extracted after being filtered through Suction filtration device.Compared with prior art, the present invention can determine as low as 0.45 μm in transformer oil of particulate matter total amount, rather than granularity distribution；It is material more than this aperture in retention oil that this method, which chooses 0.45 μm of filter membrane, and through petroleum ether, the later composition test of particulate matter can be simpler easy.
Description
Technical field
The present invention relates to the processing of transformer oil, and in particular to the method that particulate matter is extracted in transformer oil.
Background technology
Pure transformer oil insulating properties are good, and if there is impurity, its insulating properties can be greatly reduced.Work as transformer
When there is metal bulky grain in oil, although number is seldom, but compared with molecule, the influence to transformer oil insulating properties is more
To be serious.Bulky grain in oil under electric field action is to produce one of principal element of shelf depreciation.
When the abnormal operating conditions such as hot or electric discharge property occurred in oil-filled electric equipment, it can all make the metal about part rotten
Erosion, melting loss cause tenor and granularity in oil to rise in oil.When the tenor or granule foreign in oil are excessive, then
Oil flow electrification and the static discharge being generated by it can be caused, the safe operation of transformer will be threaten.
Current operating transformer oil main test granularity, granularity index is such as：500kV and above AC transformer
Oil particles degree is preferably controlled:The granule number for being more than 5 microns before putting into operation (after hot-oil circulation) in 100mL oil is less than or equal to 2000
It is individual, the granule number for being more than 5 microns in 100mL oil (is contained after overhaul) during operation less than or equal to 3000；500kV and above direct current
Converter power transformer put into operation before (after hot-oil circulation) granularity preferably control:The granule number for being more than 5 microns in 100mL oil is less than or waited
In 1000.And the composition of specific particulate matter is not required, and typically with 5 microns for boundary.
In the prior art, running situation is judged generally according to granularity for transformer oil, but in practice for not
Consequence difference is larger caused by same type particulate matter (metal is nonmetallic), and is not proposed for the particulate matter less than 5 microns
Method.
Utility model patent CN203721430U discloses a kind of processing system for reducing transformer oil dielectric loss value, including
Vacuum oil-filter with pass sequentially through pipeline circulation the absolute oil tank, oil pump and the filter that are connected, vacuum oil-filter and the absolute oil tank
Between individually connect, in addition to heater oil and dielectric loss process tank, the heater and oily dielectric loss process tank are sequentially connected in series in institute
State between oil pump and filter.The transformer oil for entering oily dielectric loss process tank is heated using heater, to improve oily Jie
Adsorption treatment ability of the process tank to pollutant in transformer oil is damaged, the transformer oil passed through by oily dielectric loss process tank convection current enters
Row processing, so as to carry out thoroughly adsorbing and clearing up to oil pipeline.Because transformer oil viscosity is big, the program is mainly used
Heater by oil to being heated, but cost is added, and oil is difficult to maintain certain temperature after the pipeline of long length
On degree, therefore treatment effect is undesirable.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of method is simple, cost
The method that particulate matter is extracted in the good transformer oil of low, effect.
The purpose of the present invention can be achieved through the following technical solutions：The side that particulate matter is extracted in a kind of transformer oil
Method, it is characterised in that this method is according to volume ratio 1 by petroleum ether and transformer oil:After 1 mixing, after being filtered through Suction filtration device
Extract particulate matter.
Described petroleum ether chooses petroleum ether of the boiling point range at 60~90 DEG C, and the petroleum ether is mixing it with transformer oil
The preceding membrane filtration first through 0.22 μm of aperture.
Described transformer oil is mixed with petroleum ether again after being heated 30 minutes at 60 DEG C.
0.45 μm of filter membrane of advance constant weight is placed in described Suction filtration device.
Described filter membrane is the cellulose acetate film for being not dissolved in oil.
The mixture of petroleum ether and transformer oil after described Suction filtration device filtering is produced after petroleum ether is volatilized totally
Clean transformer oil.
Particulate matter after described Suction filtration device filtering carries out composition detection after petroleum ether.
The present invention is directed to the larger feature of transformer oil viscosity, and selection petroleum ether is mixed with oil, by membrane filtration, is trapped in
Particulate matter on filter membrane is the result that needs are obtained.Petroleum ether chooses 60~90 DEG C of scope (filters in advance through 0.22 μm of aperture
It is standby after membrane filtration)；Filter membrane is cellulose acetate film (0.45 μm of aperture) not for oil dissolving；Petroleum ether presses 1 with transformer oil:1
Ratio mixes (volume ratio)；Filter type is suction filtration.Compared with prior art, the present invention has advantages below：
1st, this method can determine as low as 0.45 μm in transformer oil of particulate matter total amount, rather than granularity distribution；
2nd, it is material more than this aperture in retention oil that this method, which chooses 0.45 μm of filter membrane, and through petroleum ether,
The later composition test of grain thing can be simpler easy.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementations
Example.
Embodiment 1~4
A kind of method that particulate matter is extracted in transformer oil：
The first step：Take petroleum ether standby after the filter membrane suction filtration in 0.22 μm of aperture；
Second step：60 DEG C of heating of transformer oil, taking-up after 30 minutes, record quality, 1 are pressed with petroleum ether:1 ratio is fully mixed
Close, preferable mobility is obtained to reduce viscosity；
3rd step：0.45 μm of filter membrane of advance constant weight is placed in Suction filtration device and is clamped；
4th step：The mixture suction filtration of transformer oil and petroleum ether is poured into the upper cup of Suction filtration device：
5th step：Upper cup is rinsed with petroleum ether after the completion of filtering and petroleum ether volatilized clean；
6th step：Constant weight filter membrane records quality, and the content for the particulate matter that converts, and the particulate matter on filter membrane can further be done
Composition detection.
The different size filter membrane of table 1 filters out analyte detection result
| Filter membrane specification | Particle content (%) |
| 0.10μm | 0.0060 |
| 0.45μm | 0.0050 |
| 0.8μm | 0.0026 |
| 3.0μm | 0.0008 |
As it can be seen from table 1 testing result is different after the filter membrane filter of different pore size, with the increase in aperture, filter membrane
On particulate matter constantly reduce, i.e., be inversely proportional with filter sizes.But find that 0.10 μm of filter membrane is filtered compared with hard-pumped in process of the test,
Being filtered even if cut back product and increasing after dilution ratio also needs for a long time, and because environmental air quality can not be good
Ensure the pollution problem that is brought of long-time suction filtration, and test period limitation, it is believed that choose the filter membrane in 0.45 μm of aperture compared with
To be suitable.When filter sizes are larger, the particulate matter filtered out not exclusively, still can produce influence to transformer.
The particulate matter in different transformer oil is extracted using the above method, the composition of gained particulate matter is as follows：
The particulate matter quantitative result of table 2
Table 2 is the constituent content that the particulate matter being trapped on filter membrane is determined.
Claims (3)
1. a kind of method that particulate matter is extracted in transformer oil, it is characterised in that this method be by petroleum ether and transformer oil by
According to volume ratio 1:After 1 mixing, particulate matter is extracted after being filtered through Suction filtration device；
Described petroleum ether chooses petroleum ether of the boiling point range at 60~90 DEG C, and the petroleum ether is first before being mixed with transformer oil
Membrane filtration through 0.22 μm of aperture；
Described transformer oil is mixed with petroleum ether again after being heated 30 minutes at 60 DEG C；
0.45 μm of filter membrane of advance constant weight is placed in described Suction filtration device；
0.45 μm of described filter membrane is the cellulose acetate film for being not dissolved in oil.
2. the method that particulate matter is extracted in transformer oil according to claim 1, it is characterised in that described Suction filtration device
The mixture of petroleum ether and transformer oil after filtering produces clean transformer oil after petroleum ether is volatilized totally.
3. the method that particulate matter is extracted in transformer oil according to claim 1, it is characterised in that described Suction filtration device
Particulate matter after filtering carries out composition detection after petroleum ether.
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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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| 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 CN104450149A (en) | 2015-03-25 |
| CN104450149B true CN104450149B (en) | 2017-09-29 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101259378A (en) * | 2007-08-24 | 2008-09-10 | 正昌科技有限公司 | Vibrating Membrane Microfiltration of Waste Oil |
| CN101614656A (en) * | 2008-06-27 | 2009-12-30 | 上海宝钢工业检测公司 | Iron particle and organoferric quantitative analysis method in using lubricating oil |
| CN103185686A (en) * | 2011-12-30 | 2013-07-03 | 华东电力试验研究院有限公司 | Method for determining granule component in transformer oil |
-
2014
- 2014-12-17 CN CN201410787149.9A patent/CN104450149B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101259378A (en) * | 2007-08-24 | 2008-09-10 | 正昌科技有限公司 | Vibrating Membrane Microfiltration of Waste Oil |
| CN101614656A (en) * | 2008-06-27 | 2009-12-30 | 上海宝钢工业检测公司 | Iron particle and organoferric quantitative analysis method in using lubricating oil |
| CN103185686A (en) * | 2011-12-30 | 2013-07-03 | 华东电力试验研究院有限公司 | Method for determining granule component in transformer oil |
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