EP2525178B1 - Procédé de séchage d'un élément actif comprenant des isolations de matière solide d'un appareil électrique pouvant être rempli avec de l'huile d'imprégnation et dispositif destiné à l'exécution de ce procédé - Google Patents

Procédé de séchage d'un élément actif comprenant des isolations de matière solide d'un appareil électrique pouvant être rempli avec de l'huile d'imprégnation et dispositif destiné à l'exécution de ce procédé Download PDF

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Publication number
EP2525178B1
EP2525178B1 EP11004092.0A EP11004092A EP2525178B1 EP 2525178 B1 EP2525178 B1 EP 2525178B1 EP 11004092 A EP11004092 A EP 11004092A EP 2525178 B1 EP2525178 B1 EP 2525178B1
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EP
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Prior art keywords
housing
oil
solvent
heated
spray
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EP11004092.0A
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German (de)
English (en)
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EP2525178A1 (fr
Inventor
Rolf Altemeier
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Micavac AG
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Micavac AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
    • F26B21/145—Condensing the vapour onto the surface of the materials to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling

Definitions

  • the present invention relates to a process for drying an active part containing an insulating material of an electric device which can be filled with impregnating oil according to the introductory part of patent claim 1 and to an apparatus for carrying out this process.
  • the active part of an electric device in the field can be dried and freed of old insulating oil, with which the housing of the device is filled during its operation in the field.
  • the device is in particular a transformer, such as a power transformer, especially a so-called "shell type” transformer with disc windings, which are separated by insulation plates.
  • the active part comprises solid insulation impregnated with insulating oil prior to operation of the electrical equipment (impregnating oil).
  • the active part is installed in the vacuum-resistant housing of the device and kept at negative pressure.
  • the solvent vapor can be generated inside or outside the device housing.
  • water emerging from the solid insulation in the form of a mixed steam containing solvent and water vapor is fed together with unavoidable leakage air to a condensation and separation device in which the condensed water is separated from the solvent and the leakage air is sucked off with a vacuum pump.
  • the existing existing impregnating oil (waste oil) and / or impurities are removed by distillation from the solvent.
  • a drying process of the type mentioned can be found in the company publication MNV 46 / 1e Fa. Micafil Ltd, 8048 Zurich / Switzerland.
  • a described in this prior art, working according to the Vapor phase method drying device for isolierölgetränkte insulations has a outside the transformer housing arranged Solventdampfer Weger with flexible solvent vapor lines between the evaporator and the transformer housing.
  • the generated during the execution of the drying process in Solventdampfer Weger solvent vapor is passed through the flexible solvent vapor lines in a housing of a transformer and condensed to be dried and old insulating oil (waste oil) to be liberated solid insulation of the transformer active.
  • the solid insulation is heated quickly and thus allows an effective discharge of water from the insulation.
  • the solvent removes the used oil from the insulation. Since the solvent vapor also condenses on the inner wall of the housing, this process requires a lot of energy and also requires a large apparatus, assembly and material costs in the field.
  • a drying method of the type mentioned is also in EP 1528342B1 described.
  • a device shown in Figure 6 for carrying out a working according to the vapor phase method drying method for isolierölgetränkte solid insulation of a transformer has outside a housing of the transformer arranged on a Solventerhitzer and a feed pump.
  • Solvent heated in the solvent heater is in circulation in liquid form in a lying within the transformer housing, guided in the manner of a venturi flow channel.
  • part of the solvent evaporates and condenses on the solid insulation to be dried and liberated from old insulating oil (waste oil) and thus promotes the escape of water from the insulation by rapid heating of the solid insulation.
  • the solvent removes the used oil from the insulation.
  • the flow channel is formed in the manner of a Venturi nozzle and arranged as an open channel section in the interior of the housing, the circulation rate of a formed during heating of the solid insulation, solvent and water vapor mixed steam flow is greatly increased and are thus achieved short drying times.
  • the spray oil is emptied at the bottom of the transformer, the transformer continues to be under vacuum for so long held until the moisture in the insulation has fallen to acceptable levels.
  • it takes a relatively long time until the internal insulation parts reach a minimum required temperature, since they come inadequate contact with the heated spray oil.
  • the achievable insulation temperatures are much smaller than in the Vapor Phase drying is achieved despite limited drying time and high energy consumption only limited drying results.
  • the invention has for its object to provide a method of the type mentioned above, which is characterized by a low residual moisture content of the active part and a low energy requirement by a low residual moisture content of the solid part. At the same time it is also an object of the invention to provide a device which is suitable to carry out this method in a simple and economical manner.
  • a process for drying an active part containing a solid insulation of an electrical device that can be filled with impregnating oil.
  • the at least water and contaminated impregnating oil containing and arranged in a housing of the device active part is heated after evacuation of the housing by condensation of solvent vapor, which is formed by a solvent which is evaporated inside and / or outside the housing.
  • solvent vapor which is formed by a solvent which is evaporated inside and / or outside the housing.
  • at least water and solvent are separated from a mixed steam stream formed during heating and, after the heating process has ended, the heated active part is kept at negative pressure for drying.
  • the solid insulation of the active part which cools when it is heated to low pressure after completion of the heating process, is reheated by spraying warm spray oil onto the surfaces of the solid insulation.
  • warm spray oil onto the surfaces of the solid insulation.
  • any remaining solvent and residual moisture remaining in these isolations are evaporated off efficiently. This considerably shortens the drying process and thus not only reduces the throughput time but also the energy requirement of the drying process according to the invention.
  • at the bottom of the housing usually remaining, dissolved out of the solvent from the active part old impregnating oil is diluted by the spray oil used for reheating.
  • the temperature increase of the solid insulation achieved by reheating with the heated spray oil ensures that the solvent and water are now removed much more quickly from the solid insulation than in a prior art drying process in which such after-heating is not provided.
  • the entire drying process can be carried out without expensive thermal insulation of the housing.
  • the solid insulation which cools when held to negative pressure can be reheated at least a second time by spraying heated spray oil become.
  • the two resp. repeated repeating the reheating of the solid insulation is at the bottom of the generally not completely emptied housing collecting mixture of spray oil and old impregnating oil is further diluted so that the waste oil content drops to advantageously small values.
  • the spray oil needed for spraying can be sucked into the housing before being heated by the negative pressure.
  • a particularly good heat transfer from the heated spray oil to the solid insulation to be reheated is achieved when the spray oil is sprayed mainly from above and / or from the side of the solid insulation.
  • the flow channel is advantageously oriented in such a way that a flow containing solvent vapor during injection of the heated solvent is directed into a free space lying between the inner wall of the housing and the solid insulation.
  • impregnating oil After completion of the reheating for definitive filling of the housing provided impregnating oil can be heated and degassed with a device provided for performing this method device outside the housing.
  • the apparatus provided for carrying out the method according to the invention may comprise, in addition to the housing receiving the active part, a vacuum system connected to the interior of the housing, a solvent steam generator arranged inside or outside the housing and a condensation device arranged outside the housing, which is connected to the interior of the housing.
  • a vacuum system connected to the interior of the housing
  • a solvent steam generator arranged inside or outside the housing
  • a condensation device arranged outside the housing, which is connected to the interior of the housing.
  • the oil spray system may further comprise an air-cooled device preceding the condensation device for separating spray oil and / or for condensing solvent vapor.
  • Air heated in the air cooled device may be routed to an outer wall of the housing formed as a bottom.
  • the heat radiation of the housing can be reduced and energy saved accordingly.
  • the solvent steam generator can be arranged within the housing and have a flow channel configured in the manner of a Venturi nozzle and a solvent distribution channel receiving the externally supplied, heated solvent with solvent injection openings which are guided into the flow channel.
  • the solvent injection ports may be oriented so that a solvent-vapor-containing flow formed on exit from the ports is directed into a clearance between the inner wall of the housing and the solid insulation.
  • the drying device can also have a heater which heats the outside of the housing and can be connected to the solvent evaporator, which can be connected to the oil spray system after the solvent supply has been interrupted.
  • the oil spray system may comprise a heater upstream of the device for degassing the impregnating oil. This is the use of an additional
  • the drying device can have a device downstream of the heater for degassing the impregnating oil. As a result, the use of an additional oil treatment plant is not necessary and it saves operating costs and investment.
  • FIGS. 1 and 2 Drying devices shown serve the drying of a solid 1.1 containing active part 1.1 of a designed as a transformer electrical device in the vacuum-tight running housing. 1
  • the solvent is generally a light oil with a 1.5 existing impregnating oil, with which the housing 1 of the transformer is filled during its operation, and which is removed from the transformer housing 1 prior to drying of the active part 1.1.
  • the solvent necessary for the heating of the active part 1.1 is fed from a solvent storage tank 9 via a shut-off valve 20.2 with a feed pump 8, a shut-off valve 20.3, a solvent feed line 4.2.1 to the solvent / oil heater 4.
  • the heated solvent is passed via a shut-off valve 20.10 through a cover flange 1.3 to a disposed within the transformer housing 1 Solventverteilkanal 5 with injection ports 5.1. When heated solvent flows into a flow channel 6, it partially evaporates.
  • the Solventverteil- 5 and the flow channel 6 therefore act more or less as an evaporator.
  • the solvent distribution channel 5 can be advantageously formed from exposed tubes with at least one of the injection openings 5.1 and / or injection nozzles.
  • the narrowest cross-section is in the manner of a Venturi nozzle designed flow channel 6, which can be performed for cost reasons and ease of installation in the transformer housing 1 as Venturi tube.
  • the flow channel 6 is directed so that an emerging from the flow channel 6 and possibly still solvent and waste oil contained solvent vapor flow exiting into the free space between the transformer housing 1 and active part 1.1.
  • an unspecified connection line leads to an oil shut-off valve 20.17.
  • This valve is connected via a guided through a cover flange 1.3 oil connection line 4.3 with oil spray nozzles 2, which are arranged in the transformer housing 1.
  • the oil spray nozzles 2 are directed so that used for oil spraying insulating oil, hereinafter called spray oil, sprayed substantially the entire upper part of the active part 1.1.
  • the transformer housing 1 has at the bottom in its bottom a drain opening 1.4 for condensed solvent, as well as optionally washed by the solvent from the solid insulation waste oil as well as the spray oil.
  • the drain opening 1.4 is connected via a shut-off valve 20.8, a drain tank 7 and a shut-off valve 20.1 with a feed pump 8.
  • the outlet of the feed pump 8 is connected via a shut-off valve 20.3 with the solvent / oil heater.
  • shut-off valve 20.5 with a spray oil tank 3 or alternatively via a shut-off valve 20.6 with a Solventvorratstank 9 or via a check valve 20.7 with an oil tank 19 for receiving the possibly existing waste oil, which during drying of the transformer active 1.1 by the solvent from the solid 1.5 was removed and subsequently separated by distillation from the solvent.
  • the transformer housing 1 is connected via a first mixing steam leading line 10, a Dampfabsperrventil 20, an air-cooled condenser / separator 11 and a mixed steam condenser 16 with a vacuum system 18.
  • the mixed steam condenser 16 has two discharge nozzles, one of which is connected to the vacuum system 18 and the other via a vacuum shut-off valve 21 controlling the emptying of solvent and water with a separating container 17 containing a water drain valve 22.
  • the air-cooled condenser / separator 11 has a connection to the air supply from a fan 11.2 and a further connecting piece, through which the heated air is guided via a hot air line 11.3 to the bottom of the transformer housing 1. Any condensed solvent / oil vapor is fed via drain port 11.5, solvent / oil Abtropftechnisch 11.6 and check valve 20.9 the drain tank 7.
  • an impregnating oil tank 13 a ⁇ lentgasungscribe 14 and an oil feed pump 15 are additionally provided.
  • the transformer can be additionally filled with degassed impregnating oil after drying in the field with minimal expenditure on equipment.
  • the tank 13 is connected to the oil degassing stage 14 via line 13.1, oil shut-off valve 20.11, feed pump 8, shut-off valve 20.3, solvent / oil heater 4 and oil shut-off valve 20.15.
  • the heated and degassed impregnating oil is introduced into the transformer housing 1 with the pump 15 via an oil shut-off valve 20.13 and the shut-off valve 20.8.
  • the permissible oil level in the transformer housing 1 is monitored by means of a level switch 12.1.
  • the heated solvent is at a higher pressure when heated.
  • the pressure in the solvent drops sharply, with some of the heated solvent evaporating while cooling down by the amount of its heat of vaporization.
  • the resulting solvent vapor condenses on the active part 1.1 and heats it with simultaneous evaporation of the water contained in the solid insulation 1.5, resulting in the formation of a solvent and steam containing mixed steam with a small amount of air leakage in the transformer housing 1.
  • This mixed steam is sucked off with the vacuum system 18 via Dampfabsperrventil 20, any oil vapor and oil drops are deposited in the air-cooled condenser / separator 11 and condensed solvent and water vapor in the mixed steam condenser 16.
  • the condensate flows via Vakuumabsperrventil 21 to the separation tank 17.
  • the separate solvent is fed back to the solvent circuit with the feed pump 8.1 via shut-off valve 20.4 and heated in the solvent / oil heater 4.
  • the separated water is discharged via the water drain valve 22.
  • Solvent condensate obtained in the transformer housing 1 and possibly containing waste oil flows via the drain opening 1.4 and the open shut-off valve 20.8 to the drain tank 7 and is supplied to the feed pump 8 via the solvent / oil heater 4 for evaporation back to the Solventverteilkanal 5 respectively the Solventeinspritzö réelleen 5.1.
  • the solvent is injected through the solvent injection openings 5.1 with advantage at the narrowest point in the flow channel 6. This results in a particularly high flow velocity and a correspondingly high negative pressure. This leads to a jet effect, through which the mixed steam present in the transformer housing 1 is sucked into the flow channel 6.
  • the drawn-in mixed steam mixes with the high-speed injected solvent and the solvent vapor formed during injection. This produces the advantageous effect that, on the one hand, rapid and accurate temperature control of the solvent vapor entering the transformer housing 1 is achieved, and, on the other hand, that the mixed steam at increased speed flows around the active part 1.1 present in the transformer housing 1 turbulently by sucking in the mixed steam into the flow channel 6.
  • shut-off valve 20.2 Upon reaching a minimum temperature of the solid insulation 1.5, the periodic Solventzu exchange via shut-off valve 20.2 is interrupted, that is Shut-off valve 20.2 closed and one off Figure 3 apparent phase D is initiated, in which the solvent / oil mixture is circulated as described above, wherein mixed steam is removed continuously. Since the oil content in the flow channel 6 does not evaporate, with continuous removal of mixed steam from the transformer housing 1 and condensation of the extracted mixed steam in the air-cooled condenser / separator 11 and mixed steam condenser 16, the waste oil content in the transformer housing 1 steadily increases until practically only pure waste oil is present , This oil is emptied with the feed pump 8 during phase D via shut-off valve 20.7 in the oil tank 19.
  • phase D in which, as described above, without feeding of solvent, the solvent / oil mixture circulated and then any existing existing impregnating oil is emptied.
  • phase V1 the solid insulation 1.5 cools due to evaporation of moisture and solvent from the Feststoffisolation1.5 and heat radiation of the Active part 1.1 and the transformer housing 1 to the environment from so far that the evaporation of moisture and solvent due to low temperature of Feststoffisolation1.5 is greatly reduced.
  • the transformer housing 1 is maintained in the manner previously described as in the phase V1 to negative pressure. Thereafter, due to pressure difference between the transformer housing 1 and 3 spray oil tank spray oil from the tank 3 via ⁇ labsperrventil 20.16, oil filter 3.2, spray oil 3.1, ⁇ labsperrventil 20.14, and check valve 20.8 fed into the transformer housing 1 until the lower level switch 12 is flooded.
  • the spray oil via shut-off valve 20.8, drain tank 7 and shut-off valve 20.1 of the feed pump 8 is supplied and then promoted via shut-off valve 20.3 and 4.2.1 Solventitatistechnisch in the solvent / ⁇ hler 4.
  • the spray oil is heated to a value slightly above the insulation temperature and passed via shut-off valve 20.17 and oil connection line 4.3 to the arranged within the transformer housing 1 spray oil nozzles and sprayed over the surface of the active part 1.1.
  • the temperature of the solid insulation 1.5 increases again to such values that the residual solvent and moisture evaporates from the solid insulation 1.5.
  • the present in the transformer housing 1 solvent / water vapor mixture is sucked in the same manner as previously described in the phase H1 of the vacuum system 18. Any existing oil vapors and oil drops are deposited in the air-cooled condenser / separator 11 and fed back via solvent / ⁇ labtropftechnisch 11.6 and check valve 20.9 the oil circuit.
  • the drying device in addition to the under Fig.1 described procedure, that is, after completion of the drying process, the housing 1 containing the built-active part 1.1 filled with conditioned insulating oil (impregnating oil).
  • the apparatus in particular the vacuum system 18, the solvent / oil heater 4 and the feed pump 8, can advantageously be used for filling the impregnating oil.
  • the vacuum system 18 remains, as described above, connected via the open Dampfabsperrventil 20 with the transformer housing 1 and keeps the active part 1.1 under vacuum.
  • the degassing stage 14 is held on the vacuum connection line 4.4 and the open Vakuumabsperrventil 21.1 with the vacuum system 18 to negative pressure.
  • Impregnating oil tank 13 is fed via Impregnating oil line 13.1 and ⁇ labsperrventil 20.11 Impregnating the pump 8 and then promoted via shut-off valve 20.3 to the solvent / oil heater 4, heated and pumped via ⁇ labsperrventil 20.15 in the ⁇ lentgasungsshake 14 and degassed there.
  • the degassed impregnating oil is introduced via the oil shut-off valve 20.13, shut-off valve 20.8 and drain opening 1.4 into the vacuum-standing transformer housing 1 with the oil feed pump 15 until the maximum permissible oil level according to the oil level switch 12.2 has been reached.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)

Claims (15)

  1. Procédé destiné à faire sécher une partie active (1.1) contenant des isolants solides (1.5) d'un appareil électrique susceptible d'être rempli d'huile d'imprégnation, lors duquel, après l'évacuation du boîtier (1), on fait chauffer (phases H1, H2) la partie active (1.1) contenant au moins de l'eau et de l'huile d'imprégnation souillée et placée dans un boîtier (1) de l'appareil, à savoir par condensation de vapeurs de solvant, lesquelles sont générées par un solvant, que l'on fait évaporer à l'intérieur et/ou à l'extérieur du boîtier (1), lors duquel, on extrait à partir d'un flux de vapeurs mixtes se créant lors de la mise en température au moins de l'eau et du solvant et lors duquel, après l'achèvement de l'opération de mise en température, on maintient en dépression (phases V1, V2) la partie active (1.1) chauffée pour la faire sécher, caractérisé en ce qu'on fait post-chauffer (phase OS) par vaporisation d'huile à pulvériser chauffée sur la surface des isolants solides (5.1) les isolants solides (1.5) de la partie active (1.1) qui refroidissent lors du maintien en dépression, après l'achèvement de l'opération de mise en température.
  2. Procédé selon la revendication 1, caractérisé
    en ce qu'avant de la chauffer, on introduit (phase OF) l'huile à pulvériser en-dessous des isolants solides (1.5) dans le boîtier (1),
    en ce que lors d'un procédé de recirculation consécutif à l'introduction (phase OF) de l'huile à pulvériser dans le boîtier (1), on réalise les étapes de procédé suivantes :
    on pompe hors du boîtier (1) l'huile à pulvériser introduite dans le boîtier (1),
    on chauffe l'huile à pulvériser pompée à l'extérieur du boîtier (1),
    on conduit l'huile à pulvériser chauffée dans le boîtier (1) et on la vaporise sur la surface des isolants solides (1.1) et
    une fois qu'elle a restitué de la chaleur aux isolants solides (1.5), on collecte l'huile à pulvériser vaporisée dans le boîtier (1) et on la repompe hors du boîtier (1),
    et en ce qu'après l'achèvement du procédé de recirculation et l'élimination de l'huile à pulvériser hors du boîtier (1), on continue de maintenir en dépression (phase V2) les isolants solides (5.1) post-chauffés, pour les faire sécher.
  3. Procédé selon la revendication 2, caractérisé en ce que, par vaporisation d'huile à pulvériser, on fait post-chauffer (phase OS) au moins une deuxième fois les isolants solides (1.5) qui refroidissent lors du maintien en dépression.
  4. Procédé selon l'une quelconque des revendications 2 ou 3, caractérisé en ce que lors de l'introduction (phase OS), l'huile à pulvériser est aspirée dans le boîtier (1) sous l'effet de la dépression.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'on vaporise l'huile à pulvériser chauffée principalement par le haut et/ou par le côté sur les isolants solides (1.5).
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'on chauffe le solvant à l'extérieur du boîtier (1) et on l'injecte dans un canal d'écoulement (6) placé à l'intérieur du boîtier (1).
  7. Procédé selon la revendication 6, caractérisé en ce que le canal d'écoulement (6) est orienté de telle sorte qu'un flux contenant des vapeurs de solvant, se créant lors de l'injection du solvant chauffé soit dirigé dans un espace libre entre la paroi intérieure du boîtier (1) et les isolants solides (1.5).
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'après l'achèvement du post-chauffage (phase OS), on chauffe et on dégaze à l'extérieur du boîtier (1) de l'huile d'imprégnation prévue pour le remplissage définitif du boîtier (1).
  9. Dispositif destiné à réaliser le procédé selon l'une quelconque des revendications 1 à 8, contenant, parallèlement au boîtier (1) recevant la partie active (1.1), également un système de vide (18) relié avec l'intérieur du boîtier (1), un générateur de vapeurs de solvant (5, 6) placé à l'intérieur ou à l'extérieur du boîtier (1) et un dispositif de condensation (16) placé à l'extérieur du boîtier (1) qui est relié avec l'intérieur du boîtier (1), caractérisé en ce que le dispositif contient par ailleurs un système pulvérisateur d'huile avec un agencement d'embout de pulvérisation (2) prévu à l'intérieur du boîtier (1) et une pompe (8) pour le transport dans l'agencement d'embout de pulvérisation (2) de l'huile à pulvériser chauffée à l'extérieur du boîtier (1).
  10. Dispositif selon la revendication 9, caractérisé en ce que le système pulvérisateur d'huile comporte par ailleurs un dispositif (11) refroidi par air, monté en amont du dispositif de condensation (16) pour extraire de l'huile à pulvériser et/ou pour faire condenser des vapeurs de solvant.
  11. Dispositif selon la revendication 10, caractérisé en ce que l'air chauffé dans le dispositif (11) refroidi par air est guidé sur une paroi extérieure du boîtier (1) conçue en tant que fond inférieur.
  12. Dispositif selon l'une quelconque des revendications 9 à 11, caractérisé en ce que le générateur de vapeurs de solvant (5, 6) est placé à l'intérieur du boîtier (1) et comporte un canal d'écoulement (6) conçu à la manière d'un tube Venturi, ainsi qu'un canal distributeur de solvant (5) recevant le solvant chauffé amené par l'extérieur, avec des orifices injecteurs de solvant (5.1), qui sont conduits dans le canal d'écoulement (5).
  13. Dispositif selon la revendication 12, caractérisé en ce que les orifices injecteurs de solvant (5.1) sont orientés de telle sorte qu'un flux contenant des vapeurs de solvant, créé à la sortie des orifices (5.1) est dirigé dans un espace libre, situé entre la paroi intérieure du boîtier (1) et les isolants solides (1.1).
  14. Dispositif selon l'une quelconque des revendications 9 à 13, caractérisé en ce que le dispositif de séchage comporte un réchauffeur (4) chauffant le solvant à l'extérieur du boîtier (1) et susceptible d'être relié avec l'évaporateur de solvant (5, 6), qui après l'interruption de l'alimentation de solvant peut être relié avec le système pulvérisateur d'huile.
  15. Dispositif selon l'une quelconque des revendications 9 à 14, caractérisé en ce que le dispositif de séchage comporte un dispositif (14) destiné à dégazer l'huile d'imprégnation, monté en aval du réchauffeur (4).
EP11004092.0A 2011-05-18 2011-05-18 Procédé de séchage d'un élément actif comprenant des isolations de matière solide d'un appareil électrique pouvant être rempli avec de l'huile d'imprégnation et dispositif destiné à l'exécution de ce procédé Active EP2525178B1 (fr)

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Application Number Priority Date Filing Date Title
EP11004092.0A EP2525178B1 (fr) 2011-05-18 2011-05-18 Procédé de séchage d'un élément actif comprenant des isolations de matière solide d'un appareil électrique pouvant être rempli avec de l'huile d'imprégnation et dispositif destiné à l'exécution de ce procédé

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EP11004092.0A EP2525178B1 (fr) 2011-05-18 2011-05-18 Procédé de séchage d'un élément actif comprenant des isolations de matière solide d'un appareil électrique pouvant être rempli avec de l'huile d'imprégnation et dispositif destiné à l'exécution de ce procédé

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EP2525178B1 true EP2525178B1 (fr) 2017-11-29

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CN102997618A (zh) * 2012-12-17 2013-03-27 四川省晶源电气设备制造有限公司 一种防止干燥后铁芯生锈的干燥工艺

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FR2115104B1 (fr) * 1970-11-26 1974-09-20 Lamendin Louis
DE19637313C5 (de) * 1995-09-16 2007-12-27 Wilhelm Hedrich Vakuumanlagen Gmbh & Co. Kg Vorrichtung zum Aufheizen von Teilen
WO2002020113A1 (fr) * 2000-09-05 2002-03-14 Wilhelm Hedrich Vakuumanlagen Gmbh & Co. Kg Dispositif pour le traitement de transformateurs
ATE310221T1 (de) * 2001-04-24 2005-12-15 Abb Schweiz Ag Verfahren zum trocknen eines aktivteils und vorrichtung zur durchführung dieses verfahrens
EP1528342B1 (fr) * 2003-10-31 2006-08-30 Paul Gmeiner Procédé pour séchage de matériau et dispositif pour mettre en oeuvre le procédé
EP2148157B1 (fr) * 2008-07-25 2013-02-27 Paul Gmeiner Dispositif de chauffage et de séchage d'une marchandise selon le procédé de phase vapeur

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