CN1280002C - Oil-gas separation equipment of hollow fiber in use for monitoring transformer online - Google Patents
Oil-gas separation equipment of hollow fiber in use for monitoring transformer online Download PDFInfo
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- CN1280002C CN1280002C CN 200410030892 CN200410030892A CN1280002C CN 1280002 C CN1280002 C CN 1280002C CN 200410030892 CN200410030892 CN 200410030892 CN 200410030892 A CN200410030892 A CN 200410030892A CN 1280002 C CN1280002 C CN 1280002C
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- oil
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- hollow fiber
- transformer
- doughnut
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- 239000012510 hollow fiber Substances 0.000 title claims abstract description 36
- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 238000000926 separation method Methods 0.000 title description 14
- 239000003129 oil well Substances 0.000 claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000003822 epoxy resin Substances 0.000 claims abstract description 7
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- 235000012489 doughnuts Nutrition 0.000 claims description 37
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- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 17
- 230000008676 import Effects 0.000 claims description 9
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- 229940058401 polytetrafluoroethylene Drugs 0.000 description 15
- 241000196324 Embryophyta Species 0.000 description 10
- 238000011067 equilibration Methods 0.000 description 10
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- 229910052739 hydrogen Inorganic materials 0.000 description 6
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- 238000001514 detection method Methods 0.000 description 5
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- 241000219146 Gossypium Species 0.000 description 1
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- Housings And Mounting Of Transformers (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to a hollow fiber oil-gas separating device for monitoring a transformer on line, which comprises a hollow fiber component and an oil pump, wherein the hollow fiber component comprises a housing, a hollow fiber bundle, an epoxy resin seal head and a stainless steel supporting column, the side wall of the housing is provided with an oil inlet and an oil output, and both ends of the housing are provided with an air inlet and an air outlet; the outer part of the hollow fiber bundle is communicated with the oil output and the oil inlet, and the inner part of the hollow fiber bundle is communicated with the air inlet and the air outlet; the inlet of the oil pump is connected with an outlet of a transformer through a pipeline, and the outlet of the oil pump is connected with the oil inlet of the hollow fiber component; the oil outlet on the housing is connected with the inlet of the transformer, and an air discharging valve is arranged on the pipeline; an oil well, an electromagnetic valve, a vacuum pump, an oil removing pipe and a sampling and quantitating pipe are orderly connected in series through the pipeline, the side wall of the oil well is provided with a liquid level switch, the air inlet on the housing is connected with the sampling and quantitating pipe, and the air outlet on the housing is connected with the inlet of the oil well. The present invention can separate air in the transformer in a short time.
Description
Technical field
The invention belongs to the power equipment detection range, refer to a kind of doughnut gas and oil separating plant that is used for transformer online monitoring especially.
Background technology
The large-scale power transformer inspection and repair system that acts out one's plan at present, and unavoidably can there be the problem that maintenance is superfluous or maintenance is not enough in scheduled overhaul.The superfluous huge waste that causes manpower, financial resources, material resources of maintenance causes utilization rate of equipment and installations to reduce, and may cause damage to normal device; The not enough accident potential that may cause equipment of maintenance.Adopt on-line monitoring technique can effectively avoid these problems, and finally realize the repair based on condition of component of transformer.
Exist the power transformer of potential faults or fault, can produce H in its insulating oil
2(hydrogen), CO (carbon monoxide), CO
2(carbon dioxide), CH
4(methane), C
2H
6(ethane), C
2H
2(acetylene), C
2H
4(ethene) several fault signature gases are differentiated transformer inside according to oil dissolved gas and whether are had the latency fault, also claim the oil chromatography analytic approach, just begin to use in power system from the fifties, and its validity is generally proved.But the conventional chromatogram method often can not in time capture fault-signal.So the Gas in Oil of Transformer on-line monitoring is the technology of domestic positive popularization.
The Gas in Oil of Transformer on-line monitoring system generally is made up of Oil-gas Separation unit, gas detection cell, microcomputer data processing unit and communication unit.Wherein the Oil-gas Separation unit is responsible for dissolved gases in the oil is separated, and is the prerequisite that system detects and analyzes.
What present online Oil-gas Separation employing was more is the polymeric membrane of plate frame structure, and the mechanism of Oil-gas Separation is dissolving-diffusion process, and its advantage is simple in structure.And the material multiselect of film is with the polytetrafluoroethylene (PTFE) of title that " plastics king " arranged, because its stable chemical performance, oil resistant, high temperature resistant, good mechanical property, permeability are also good.
Pertinent literature is:
[1] Jia Ruijun, the application of macromolecule membrane in transformer oil dissolved gas on-line monitoring, transformer, 2001,38 (10): 37-40.[2] Jia Ruijun, the development of dissolving hydrogen on-line monitoring instrument in the transformer oil, electric power network technique, 1998,22 (1): 4-7
The scheme that these two pieces of articles are introduced adopts the sheet frame film, and hydrogen is very fast by the seepage velocity of film, and equilibration time has only 15 hours.
For improving the real-time of fault detect, the gas and oil equilibration time makes every effort to short more good more.Reflection according to the power consumer that uses this series products, the seepage velocity of hydrogen is apparently higher than other several gases, just can realize balance at one day with interior, but all the equilibration time of fault signature gas is generally more than a week, so Chang equilibration time has proposed very high requirement to the sealing of air chamber, if the long term seal of air chamber is good inadequately, concentration will change in the air chamber, and finally the measurement result to whole system causes very big influence.And because the equilibration time of diffusion barrier is long, very big to the equilibration time difference of various fault signature gas, C for example
2H
6Equilibration time than H
2And CH
4Big several days, the measurement result of rear end is difficult to obtain in the oil gas concentration instantaneous value accurately according to Henry'S coefficient like this, and its measured value can not be followed the tracks of the variation of reality when gas concentration in the oil changes.
The Gas in Oil of Transformer of Canada morganschaffer company is collected device GP100.It directly is contained in the transformer fuel outlet valve, and there are the many macromolecule capillaries that curve U-shaped inside, and end is connected to a collection chamber, gets gas with syringe, and gas circuit and oil circuit do not circulate.The function of GP100 is a collection at hydrogen, and existing at home many families use, and the equilibration time of hydrogen is about one day.
Except that polymeric membrane, the people is arranged with bubbling, dynamically method such as head space is applied to the on-line monitoring Oil-gas Separation, its subject matter is: 1. complex structure, easy break-down.2. in degasification process, oil directly contacts with gas, and the pollution that transformer oil can be subjected to air jeopardizes insulation; If the oil after will outgasing abandons, both consumed transformer oil, increase the maintenance workload of monitoring system again, and be difficult to still guarantee that transformer oil is isolated fully with air in monitoring system, finally bring hidden danger to system safety operation; 3. repeated bad.This creator actively makes great efforts research, through research and development with great concentration, invents out the present invention of true tool practical effect and industrial utilization finally.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can realize several fault signature gas gas and oil equilibrations, that be fit to The field, the doughnut gas and oil separating plant that is used for transformer online monitoring of contaminated oil not at short notice.
For achieving the above object, the present invention takes following design: a kind of doughnut gas and oil separating plant that is used for transformer online monitoring, and it is characterized in that: it comprises:
One hollow-fiber module comprises: shell; Hollow fiber bundle, the two ends of hollow fiber bundle seal with the epoxy resin end socket, and the centre adds the stainless steel support column, uses the resistance oil silicone rubber seal with O ring between epoxy resin end socket and the shell; Side wall of outer shell is provided with an oil-in and an oil-out, and the shell two ends are provided with an air inlet, a gas outlet; The outside of intrafascicular each doughnut of doughnut communicates with oil-out and oil-in, and the inside of intrafascicular each doughnut of doughnut is connected with air inlet and gas outlet by its openings at two ends;
One oil pump, its import is connected with the transformer outlet by pipeline, and its outlet is connected with the oil-in of hollow-fiber module by pipeline;
Oil-out on the hollow-fiber module shell is connected with the transformer import by pipeline, and pipeline is provided with vent valve;
Oil well, magnetic valve, the vavuum pump that is connected in series successively by pipeline, pipe and sampling quantity tube deoil, oil well is tubbiness, the oil well sidewall is provided with the liquid-level switch of control magnetic valve, and the air inlet on the shell is connected with the sampling quantity tube, and the gas outlet on the shell is connected with the import of oil well.
Hollow fiber bundle is made up of 50-1000 root doughnut, and doughnut is made by unformed polytetrafluoroethylene (PTFE) or Kynoar.
Vavuum pump is the miniature diaphragm pump.
Oil pump is the miniature gears pump.
Liquid-level switch is the photoelectric liquid-levle switch.
Advantage of the present invention is: 1, the present invention is used for the doughnut gas and oil separating plant of transformer online monitoring, because it adopts following means, shortened the equilibration time of Oil-gas Separation significantly: 1) the Oil-gas Separation film has used doughnut, has improved oil and film contact area.2) doughnut adopts unformed polytetrafluoroethylene (PTFE) of high gas permeable material or Kynoar to make, and improves the permeability H of film.3) in working order, gas constantly circulates with the gas of sampling quantity tube in the hollow fiber bundle, has reduced gas initial concentration C in the air chamber
04) in working order, the oil in the hollow-fiber module shell and the oil of transformer body constantly circulate, and have increased gas concentration C ' in the oil.
2, the present invention is used for the doughnut gas and oil separating plant of transformer online monitoring, and at work, transformer oil is in closed state all the time, does not directly contact with air, can guarantee that oil is not polluted in the Oil-gas Separation process.
3, the present invention is used for the doughnut gas and oil separating plant of transformer online monitoring, and relatively simple for structure, the mechanical part of device is few, can realize computer controlled automatic, can be used in on-line monitoring.This method can realize the balance of all fault signature gases through The field in one hour, with respect to the oil and gas separation method of plate and frame film, speed is greatly improved.To important and transformer that the latency defective is arranged, can realize " urgent nurse " like this, promptly can carry out one-time detection, detect the development trend of fault in real time every one hour.
Description of drawings
Fig. 1 represents the whole schematic diagram of the present invention
Fig. 2 represents the hollow-fiber module structure chart among the present invention
The specific embodiment
As shown in Figure 1 and Figure 2, a kind of doughnut gas and oil separating plant that is used for transformer online monitoring of the present invention, it is characterized in that: it comprises:
One hollow-fiber module 4 comprises: shell 15; Hollow fiber bundle 16, the two ends of hollow fiber bundle 16 seal with epoxy resin end socket 13, and the centre adds stainless steel support column 14, seals with resistance oil silicone rubber O shape circle 12 between epoxy resin end socket 13 and the shell 15; Shell 15 sidewalls are provided with an oil-in 20 and an oil-out 17, and shell 15 two ends are provided with an air inlet 18, a gas outlet 11; The outside of each doughnut communicates with oil-out 17 and oil-in 20 in the hollow fiber bundle 16, and the inside of each doughnut is connected with air inlet 18 and gas outlet 11 by its openings at two ends in the hollow fiber bundle 16;
One oil pump 3, its import is connected with transformer 1 outlet by pipeline, and its outlet is connected with the oil-in 20 of hollow-fiber module 4 by pipeline;
Oil-out 17 on hollow-fiber module 4 shells 15 is connected with transformer 1 import by pipeline 21, and pipeline 21 is provided with vent valve 2; When the first operation of device, vent valve 2 is opened, and oil pump 3 runnings make oil circuit be full of oil, and gas bleeds off by vent valve 2.
Oil well 5, magnetic valve 6, the vavuum pump 7 that is connected in series successively by pipeline, pipe 8 and sampling quantity tube 9 deoil, oil well 5 is tubbiness, oil well 5 sidewalls are provided with the liquid-level switch 10 (control circuit employing custom circuit) of control magnetic valve 6, air inlet 18 on the shell 15 is connected with sampling quantity tube 9, and the gas outlet 11 on the shell 15 is connected with the import of oil well 5.Gas in the sampling quantity tube 9 can detect by checkout gear.The pipe 8 interior filling glass cottons that deoil may be infiltrated the oil vapour of gas circuit with elimination.Wherein oil well 5 and magnetic valve 6, when the doughnut accidental damage, oil at first penetrates in the oil well 5, and when liquid-level switch 10 detected oil impregnate in the oil well 5, magnetic valve 6 cut out, and the detection system of back can not be damaged because of oil-feed.
The gas penetration mechanism of film is a dissolving-diffusion process, follows following relational expression:
C＝(9.87KC′-C
0)×[1-exp(-1.013×10
5×HAt/dV)]+C
0 (1)
In the formula, gas concentration in the C-air chamber, gas concentration in C '-oil, V-gas chamber volume, A-oil and film contact area, the thickness of d-film, the equilibrium constant of K-gas, C
0Gas initial concentration in the-air chamber, t-time of penetration, the permeability of H-film.Through the sufficiently long time, in the oil phase in gas and the gas phase gas reach dynamic equilibrium, according to Henry's law, the both sides gas concentration has a fixing proportionality coefficient, detects phase concentrations and just can release gas concentration in the oil.
The working method that the present invention is used for the doughnut gas and oil separating plant of transformer online monitoring is: in off working state, magnetic valve 6 turn-offs, and oil pump 3 and vavuum pump 7 do not turn round.In working order, magnetic valve 6 is open-minded, oil pump 3 and all entrys into service of vavuum pump 7, and the gas that vavuum pump 7 drives in the gas circuit circulates, and the high concentration gas in the doughnut is constantly upgraded by the light concentration gas of outer gas circuit like this, the gas initial concentration C in the formula (1)
0Less relatively, improved the gas seepage velocity.And because the gas in the oil circuit constantly is penetrated in the gas circuit, oil dissolved gas in hollow-fiber module 4 shells 15 can reduce, so the oil that oil pump 3 drives in the oil circuit circulates, oil in the transformer 1 constantly replenishes into, the gas concentration of the oil in hollow-fiber module 4 shells 15 is remained unchanged substantially, be equivalent in the formula (1) that gas concentration C ' remains on maximum in the oil, improved the gas seepage velocity.Turn round after one hour, Oil-gas Separation realizes balance, oil pump 3 and vavuum pump 7 all shut down, sampling quantity tube 9 internal gas pressures remain steady state value like this, follow-up checkout gear detects the gas in the sampling quantity tube at once, magnetic valve 6 turn-offs then, finishes the Oil-gas Separation work period like this one time.
From the above, the doughnut gas and oil separating plant that the present invention is used for transformer online monitoring at work, transformer oil is in closed state all the time, does not directly contact with air, can guarantee that oil is not polluted in the Oil-gas Separation process.
The structure of Kynoar hollow-fibre membrane is a dissymmetrical structure, is made up of the compacted zone of very thin (number μ m) and the porous support layer of thicker (μ m up to a hundred).Porous support layer is mainly kept the self-supporting ability of doughnut, and membrane permeability can depend primarily on compacted zone.The mechanism that the oil gas film separates is dissolving-diffusion process, so gas can pass through compacted zone.Transformer oil is a mixture, and wherein micromolecular molecular weight has only about 100, and compacted zone can prevent that oil molecule from penetrating in the gas circuit.The gross thickness of film need be taken into account permeability and support strength, is taken as about 100 μ m.For preventing that further oil molecule from seeing through film, the doughnut outer surface is handled to have improved the oil repellency energy with poly-vinyl alcohol solution.Concrete grammar is that the poly-vinyl alcohol solution of fiber with concentration 5g/L soaked 10 minutes, uses pure water rinsing after the taking-up.
The permeability of unformed polytetrafluoroethylene (PTFE) (Teflon AF) surpasses poly tetrafluoroethylene greatly, and particularly to the permeability H of several fault signature gases, the hundreds of that is polytetrafluoroethylene (PTFE) is to thousands of times; It is one of best up to now gas permeable material.Adopt the doughnut of unformed polytetrafluoroethylene (PTFE) to be fine and close homogeneous texture, not stratified, can obtain better intensity like this, the defective of having stopped to form in the film forming procedure simultaneously causes the generation of oil leakage phenomenon.
Vavuum pump 7 is the miniature diaphragm pump.
Liquid-level switch 10 is the photoelectric liquid-levle switch.
The present invention is relatively simple for structure, and the mechanical part of device is few, can realize computer controlled automatic, can be used in on-line monitoring.This method can realize the balance of all fault signature gases through The field in one hour, with respect to the oil and gas separation method of plate and frame film, speed is greatly improved.To important and transformer that the latency defective is arranged, can realize " urgent nurse " like this, promptly can carry out one-time detection, detect the development trend of fault in real time every one hour.
The above;, be not that attempt is done any pro forma restriction to the present invention according to this, only so every under the present invention's creation spirit for being used for explaining the present invention's preferred embodiment; any modification or the change done all must belong to the scope that the invention is intended to protection.
Claims (5)
1, a kind of doughnut gas and oil separating plant that is used for transformer online monitoring, it is characterized in that: it comprises:
One hollow-fiber module (4) comprising: shell (15); Hollow fiber bundle (16), the two ends of hollow fiber bundle (16) seal with epoxy resin end socket (13), and the centre adds stainless steel support column (14), seals with resistance oil silicone rubber O shape circle (12) between epoxy resin end socket (13) and the shell (15); Shell (15) sidewall is provided with an oil-in (20) and an oil-out (17), and shell (15) two ends are provided with an air inlet (18), a gas outlet (11); The outside of each doughnut communicates with oil-out (17) and oil-in (20) in the hollow fiber bundle (16), and the inside of each doughnut is connected with air inlet (18) and gas outlet (11) by its openings at two ends in the hollow fiber bundle (16);
One oil pump (3), its import is connected with transformer (1) outlet by pipeline, and its outlet is connected with the oil-in (20) of hollow-fiber module (4) by pipeline;
Oil-out (17) on hollow-fiber module (4) shell (15) is connected with transformer (1) import by pipeline (21), and pipeline (21) is provided with vent valve (2);
Oil well (5), magnetic valve (6), the vavuum pump (7) that is connected in series successively by pipeline, pipe (8) and sampling quantity tube (9) deoil, oil well (5) is tubbiness, oil well (5) sidewall is provided with the liquid-level switch (10) of control magnetic valve (6), air inlet (18) on the shell (15) is connected with sampling quantity tube (9), and the gas outlet (11) on the shell (15) is connected with the import of oil well (5).
2, the doughnut gas and oil separating plant that is used for transformer online monitoring as claimed in claim 1, it is characterized in that: hollow fiber bundle (16) is made up of 50-1000 root doughnut, and doughnut is made by unformed polytetrafluoroethylene (PTFE) or Kynoar.
3, the doughnut gas and oil separating plant that is used for transformer online monitoring as claimed in claim 1 or 2 is characterized in that: vavuum pump (7) is the miniature diaphragm pump.
4, the doughnut gas and oil separating plant that is used for transformer online monitoring as claimed in claim 1 or 2 is characterized in that: oil pump (3) is the miniature gears pump.
5, the doughnut gas and oil separating plant that is used for transformer online monitoring as claimed in claim 1 or 2 is characterized in that: liquid-level switch (10) is the photoelectric liquid-levle switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410030892 CN1280002C (en) | 2004-04-09 | 2004-04-09 | Oil-gas separation equipment of hollow fiber in use for monitoring transformer online |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410030892 CN1280002C (en) | 2004-04-09 | 2004-04-09 | Oil-gas separation equipment of hollow fiber in use for monitoring transformer online |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1562449A CN1562449A (en) | 2005-01-12 |
| CN1280002C true CN1280002C (en) | 2006-10-18 |
Family
ID=34481208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410030892 Expired - Lifetime CN1280002C (en) | 2004-04-09 | 2004-04-09 | Oil-gas separation equipment of hollow fiber in use for monitoring transformer online |
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| Country | Link |
|---|---|
| CN (1) | CN1280002C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546646B (en) * | 2009-03-26 | 2011-07-20 | 上海交通大学 | On-line monitoring oil-gas separation device for transformer |
| CN102139185B (en) * | 2010-12-31 | 2013-10-02 | 北京华电云通电力技术有限公司 | Membrane device for monitoring separation of dissolved gases in transformer oil on line |
| CN102527094B (en) * | 2011-12-30 | 2014-03-19 | 昆山和智电气设备有限公司 | Oil-gas separation device for transformer insulation oil |
| CN104857743B (en) * | 2014-02-21 | 2017-01-18 | 中国石油化工股份有限公司 | Polymer solution sealed deoxygenation device and method |
| CN105097190B (en) * | 2015-09-29 | 2017-04-12 | 深圳市旭明消防设备有限公司 | Charged full-automatic flame failure protection device and protection method for oil immersed transformer |
| CN106680297A (en) * | 2017-03-09 | 2017-05-17 | 重庆大学 | Method for observing dispersion staining images of fibers in transformer oil |
| CN111579499A (en) * | 2020-05-15 | 2020-08-25 | 云南电网有限责任公司电力科学研究院 | Membrane module for separating and detecting dissolved gas in transformer oil |
-
2004
- 2004-04-09 CN CN 200410030892 patent/CN1280002C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1562449A (en) | 2005-01-12 |
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