CN102054577A - System and method for realizing kerosene vapor-phase drying to on-site assembly transformer - Google Patents
System and method for realizing kerosene vapor-phase drying to on-site assembly transformer Download PDFInfo
- Publication number
- CN102054577A CN102054577A CN2010102654064A CN201010265406A CN102054577A CN 102054577 A CN102054577 A CN 102054577A CN 2010102654064 A CN2010102654064 A CN 2010102654064A CN 201010265406 A CN201010265406 A CN 201010265406A CN 102054577 A CN102054577 A CN 102054577A
- Authority
- CN
- China
- Prior art keywords
- transformer
- kerosene
- oil tank
- oil
- gas phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to a system and a method for realizing kerosene vapor-phase drying to an on-site assembly transformer, in particular to a system and a method adopted for vapor-phase drying treatment in assembling and overhauling a transformer on site. The system uses a transformer oil tank for containing the transformer as a working capacity for the vapor-phase drying treatment, and the transformer oil tank is connected with vapor-phase drying equipment arranged outside the transformer oil tank by utilizing a connecting pipeline. For facilitating transportation and suiting the limitation and variance of the transformer mounting site, the invention assembles the vapor-phase drying equipment into a modulated mode. Accordingly, the system and the method of the invention can be adopted to achieve the aims of carrying out the vapor-phase drying treatment to the transformer on the transformer mounting site. Meanwhile, compared with a solid kerosene vapor-phase drying system, the invention has simpler system construction and decreases the manufacture and mounting costs of the vapor-phase drying treatment system of the transformer while thoroughly drying the transformer.
Description
Technical field
The present invention relates to transformer production and make the field, more specifically, the present invention relates to a kind of kerosene oil-gas phase drying method that utilizes in the transformer erecting bed and transformer body is carried out the system and method for gas phase dried.
Background technology
In recent years, along with China's electric power industry development is swift and violent, greatly developing of water power (clean energy resource) particularly, and China needs the industry of electric power development to be distributed in southwest, outlying district, northwest (accounting for more than 80%) mostly, for very inconvenience of large-scale workpiece transportation.Like this, owing to be subjected to multifactorial restrictions such as shipping height, bridge bearing, the heavy high-power transformer of hundreds of ton can not integral body be transported to the erecting bed, thereby adopts the mode that transformer is transported and re-assemblies after reaching the spot with the form of disintegrating.But,, cause the insulating part on the transformer to make moist because the transformer after disintegrating exists transportation and the long situation of assembled in situ process time.Therefore, how transformer is carried out the field drying processing and just become the key technology that must solve.
At present, the following several traditional drying methods of the general employing of field drying transformer, as: hot blast vacuumize, spray vacuumize, current flow heats drying (comprising fuel tank eddy current heating, zero-sequence current heating, short circuit current heating) etc.Yet above-mentioned drying means exists all that heating-up temperature is low, and heating time is long, heats shortcomings such as inhomogeneous, that drying is not thorough.
But, transformer for big capacity, voltage levels, best drying means is to adopt the gas phase seasoning, the method is because of using the kerosene steam as heat medium, and the white drying process almost is to carry out under the situation of an anaerobic, so have the heating-up temperature height, rate of drying is fast, drying time is short, homogeneous heating, dry thoroughly, can clean the advantages such as foreign material on the transformer.
The gas phase drying system is big and complicated system, usually, except vacuum tank and huge cooling system will be set fixedly, also will be provided with sufficient water source and thermal source, reaches a large amount of civil engineering work.Present transformer production producer all makes the gas phase drying system fixedly, and it is built on the fixing basis, is used for handling transformer at transformer manufactory inner drying.Usually, in fixed gas phase drying system, fixed vacuum tank is the body of work volume.During dried, the thing that is dried is placed in the vacuum tank, and vacuum tank is finished heating, technical process such as vacuumized.In this system, other part for example evaporator etc. also is provided with round vacuum tank.In order to guarantee the temperature of vacuum tank, the outer wall of vacuum tank is provided with the steam comb that is used to heat and the insulation material that is used to be incubated and outsourcing armouring, and cover (door) has special hydraulic system to make its sealing, for also being provided with the flatcar of placing transformer body in the horizontal vacuum jar, be outside equipped with the draw-gear that makes transformer turnover jar etc. at vacuum tank.
Referring now to Fig. 1, the course of work of the fixed gas phase drying of prior art is described.Fig. 1 shows the schematic diagram of schematic diagram of the fixed gas phase drying system of prior art, and single arrow is a kerosene steam trend among the figure, and double-head arrow is the steam backhaul, and three arrows are the kerosene backhaul; In the drawings, 1-vacuum plant, 2-cooling water system, 3-vacuum tank door gear, 4-vacuum tank, 5-condenser, 6-waste water receiving system, 7-evaporator, 8-sump tank, 9-oil storage tank, 10-water vapour supply system.
The course of work of fixed gas phase dried adopts following steps:
The first step: after lifting transformer body on the flatcar, flatcar is drawn in the vacuum tank with draw-gear.
Second step: on product, insert temperature sensor, close the vacuum tank door then, and the vacuum tank door is compressed with a jar door hold down gag.
The 3rd step: the dry running of beginning vapour phase.The gas phase dry run is divided into five stages:
Preparatory stage, the pressure that at first utilizes vacuum plant 1 to reduce in the vacuum tank 4, and evaporator 7 begins to heat up to kerosene by the water vapour that water vapour supply system 10 is supplied.
Heating period, the water vapour that evaporator 7 continues to be supplied by water vapour supply system 10 heats up to kerosene, make kerosene liquid become the kerosene steam, the kerosene steam is transported in the vacuum tank 4 by pipeline, thereby heating is placed on the transformer body in the vacuum tank, increase along with heating time, transformer body is heated gradually, moisture start vaporizer in its insulating material, make and form in the vacuum tank by the kerosene steam, a kind of mist that the air that water vapour and vacuum tank leak is formed, this mist is transported to condenser 5 through return conduits, water vapour and kerosene steam are condensed under the effect of cooling water system 2 in condenser 5, and leakage air is discharged into atmosphere by the vacuum pump (not shown), simultaneously different with kerosene mixture because of proportion through condensed water, in condenser, obtain separating, then, the kerosene of separating is evacuated to circulate in the evaporator 7 by the oil pump (not shown) and re-uses, and the moisture of separating then is discharged in the waste water receiving system 6.
Buck stage, when the moisture major part of the insulating material of transformer is got rid of, then begin to stop to the heating of kerosene and the conveying of kerosene steam, utilize vacuum plant 1 that the mist in the vacuum tank 4 is discharged simultaneously, the kerosene that remains in the insulating material is evaporated again.
High vacuum stage of Fig further utilizes 1 pair of vacuum tank 4 of vacuum plant to vacuumize at last, and the kerosene and the water that remain in the insulating material mid-deep strata are further evaporated, and finishes up to drying.
Remove vacuum stages, i.e. aeration step, reach dry termination condition after, remove vacuum in the vacuum tank thereby charge into air, make product go out jar at last.
The system's setting and the course of work from above fixed gas phase drying, described gas phase dried system cost of manufacture is quite high, do not calculate very much economically, and described system is subjected to environmental limit very high, promptly must adopt fixed vacuum tank and have sufficient water source and thermal source, could realize transformer gas phase dried.
Summary of the invention
Therefore, how to assemble the on-the-spot problem that realizes transformer is carried out the gas phase dried in order to solve at transformer, with to solve formation complexity, cost that fixed gas phase dried system has high and be subjected to the problem of environmental limitations, the purpose of this invention is to provide the system and method that a kind of site installation transformer realizes that kerosene oil-gas is dry mutually, it can not be subjected to environmental limit just can carry out the gas phase dried to transformer in the transformer erecting bed, thereby can overcome above-mentioned shortcoming and defect of the prior art.
In order to realize the foregoing invention purpose, the present invention adopts the oil tank of transformer with ccontaining transformer to substitute vacuum tank in the fixed gas phase drying system, and the gas phase equipment for drying made modular, and then after transformer is transported to, each part of system is assembled connection, transformer is carried out the gas phase dried thereby be implemented in the transformer erecting bed.
The invention provides a kind of to the dry mutually system of site installation transformer realization kerosene oil-gas, this system is the oil tank of transformer of the ccontaining transformer swept volume as the gas phase dried, and oil tank of transformer utilizes connecting tube and is arranged on its outside gas phase drying equipment and is connected.
Gas phase drying equipment of the present invention is assembled into modular.Described gas phase drying equipment can be made into a gas phase drying equipment assembly module.
Further, gas phase drying equipment of the present invention is made a plurality of modules.Described a plurality of module comprises that vacuum condensation module, kerosene steam heated module, kerosene return module, refrigerating module, oil storage tank and sump tank.They are freely placed according to the landform of processing site in the mode of module combinations, and are provided with connecting tube between them.Adopt a plurality of module of the present invention, can simplify the formation of gas phase dried system, and be easy to apace the each several part of system be assembled, thereby be implemented in the purpose that transformer gas phase dried is carried out at the transformer scene.
Preferably, vacuum condensation module, kerosene steam heated module, kerosene returns module and refrigerating module all adopts container structure.Because container structure is adopted in the external packing of a plurality of modules of the present invention, so that the installment work of system becomes simply, easy operating.
Further, the vacuum condensation module mainly comprises vacuum unit, condenser and collecting tank etc.;
Kerosene steam heated module mainly comprises evaporator and hotline heater etc.;
Kerosene returns module and mainly comprises coarse filter etc.;
Refrigerating module mainly comprises water tank and handpiece Water Chilling Units, and is provided with connecting tube between the parts in described each module.The present invention has adopted a simple and easy cooling water system, promptly form by large and small handpiece Water Chilling Units and a water tank, supply of equipment cooling water in vacuum condensation module, kerosene steam heated module respectively, solve the problem of transformer erecting bed lack of water, omitted the dry mutually huger cooling water system of fixed air.
Preferably, the evaporator that the present invention adopts is the external single evaporator, is used to realize kerosene evaporation and distillation, and hotline heater utilization electricity heats conduction oil, and then heat-conducting oil heating kerosene, thereby makes liquid kerosene become the kerosene steam.By adopting heat-conducting oil heating kerosene, make system of the present invention not be subjected to the restriction of installation environment, that is, system of the present invention does not need with traditional fixed gas phase dried mode sufficient thermal source to be set equally, just can realize the gas phase dried.
Further, the connecting tube of system of the present invention adopts telescopic pipeline, connects to be used for compensation.Thereby, can be according to the flexible arbitrarily length that connects of the landform of erecting bed.
Preferably, in connecting tube, except that the connecting tube that connects refrigerating module adopted the plastic flexible pipe of band steel wire, remaining connecting tube all adopted telescopic stainless steel flexible hose.
Further, oil tank of transformer is provided with attemperator, and it is used for oil tank of transformer is incubated.Preferably, the attemperator of oil tank of transformer of the present invention is arranged on the heat-insulation layer of transformer outside, and the assisted heating device that is arranged on the oil tank of transformer bottom.
Further, also be provided with the base that upper surface is an inclined surface below the oil tank of transformer bottom, described inclined surface tilts along the length direction of oil tank of transformer, and the oil tank of transformer that is placed on it is inclined to set.Owing to adopted the base that tilts, the oil tank of transformer on it is inclined to set, thereby the oil that helps in the oil tank of transformer flowed out oil tank of transformer swimmingly.
Oil tank of transformer of the present invention also is provided with and is used for the gas circuit mouth and the oil circuit mouth that are connected with outside gas phase drying equipment.
Further, the gas circuit mouth comprises kerosene vapour inlet and vacuum port, and described kerosene vapour inlet is arranged on the place, middle and lower part of oil tank of transformer side, and described vacuum port is arranged on the top of oil tank of transformer.
Further, be provided with guide pipe in the kerosene vapour inlet, and guide pipe is provided with supporting baffle, is used for the kerosene steam that flows in the guide pipe is shunted, thereby avoids kerosene vapour inlet place transformer body minor insulation superheating phenomenon to occur.
Further, and the dry air inlet is installed on the vacuum pipe that vacuum port is connected, wherein, is connected with dry air generator at the dry air inlet.
Oil circuit mouth of the present invention comprises kerosene first outlet and kerosene second outlet.Wherein, kerosene first outlet is arranged on apart from the oil tank of transformer bottom to be had on the sidewall at certain altitude place, as the main oil-out of oil tank of transformer in gas phase dried process, kerosene second outlet is arranged on the bottom of oil tank of transformer, is used for the oil of oil tank of transformer is all drained.The kerosene that is externally connected to of kerosene first outlet and kerosene second outlet returns module.
System of the present invention also is provided with temperature control equipment, and wherein described oil tank of transformer is provided with temperature sensor.Described temperature control equipment links to each other with the electric part of system.
At inventive concept of the present invention, the present invention also provides a kind of the site installation transformer is realized the method that kerosene oil-gas is dry mutually, described method is that the transformer with processing to be dried is placed in the oil tank of transformer, utilize connecting tube that oil tank of transformer is connected with the gas phase drying equipment that is arranged on the oil tank of transformer outside, and adopt kerosene oil-gas phase drying method the withering method of the transformer in the oil tank of transformer.Therefore,, oil tank of transformer can be substituted the vacuum tank of fixed gas phase dried, thereby reduce equipment cost, realize transformer being carried out the purpose of gas phase dried in the transformer erecting bed owing to adopt method of the present invention.
In the present invention, dry mutually processing of described kerosene oil-gas comprises preparation process, heating steps, depressurization step, high vacuum step and removes vacuum step; Wherein, in removing vacuum step, the dry air that utilizes dry air generator to produce is removed vacuum to oil tank of transformer.Thereby, guarantee that transformer thoroughly carries out drying, and avoid transformer secondary to make moist.
In order to guarantee treated transformer finish-drying, the present invention also comprises the method for the final water content of comprehensive judgement transformer, and the determination methods that is adopted comprises following aspect:
1) transformer total drying time;
2) transformer dry finishes mean temperature;
3) the final vacuum degree of transformer dry;
4) transformer dry product final outflow water rate; With
5) transformer dry insulation test block moisture measurement.
Should be understood that, for invention, the general introduction of front still be following detailed description all be example and illustrative, be intended to the explanation that the invention provides, but not protection scope of the present invention limited being advocated.
Description of drawings
Accompanying drawing provides further to be understood the present invention, incorporates and form the application's a part into.Specific embodiments of the invention with specification in order to illustrate formation characteristics of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic diagram of the schematic diagram of the mutually dry treatment system of the fixed kerosene oil-gas of prior art.
Fig. 2 shows the schematic diagram of the schematic diagram of the system that transformer is carried out on-the-spot gas phase dried of the present invention.
Fig. 3 shows the process chart of kerosene oil-gas phase dried transformer of the present invention.
Embodiment
Below in conjunction with accompanying drawing content of the present invention is described in further detail.
How transformer to be carried out dry problem in order to solve on-the-spot realization of transformer assembling, with to solve formation complexity, cost that fixed gas phase dried system has high and be subjected to the problem of environmental limitations, the invention provides the system and method that a kind of site installation transformer realizes that kerosene oil-gas is dry mutually, it can not be subjected to environmental limit just can carry out the gas phase dried to transformer in the transformer erecting bed.
In order to realize purpose of the present invention, the present invention adopts the oil tank of transformer with ccontaining transformer to substitute vacuum tank in the fixed gas phase drying system, and the gas phase equipment for drying made modular, and then after transformer is transported to, each part of system is assembled connection, transformer is carried out the gas phase dried thereby be implemented in the transformer erecting bed.
In order to embody inventive concept of the present invention and characteristics of the present invention better, now the specific embodiment of the present invention is described in detail.
Fig. 2 shows the schematic diagram of the schematic diagram of the system that transformer is carried out on-the-spot gas phase dried of the present invention, single arrow is kerosene steam trend among the figure, double-head arrow is the steam backhaul, and three arrows are the kerosene backhaul, and a plurality of dashed rectangle is expressed as a plurality of modules of gas phase drying equipment.Among Fig. 2,11-oil tank of transformer 12-vacuum port, 13-dry air inlet, 14-kerosene vapour inlet, first outlet of 15-kerosene, 16-kerosene steam heated module, 17-vacuum condensation module, the 18-refrigerating module, 19-kerosene returns module, second outlet of 20-kerosene, 21-assisted heating device, 22-temperature sensor, the 23-base, the 24-evaporator, 25-hotline heater, 26-sump tank, the 27-oil storage tank, the 28-collecting tank, 29-condenser, 30-vacuum unit, the 31-water tank, the 32-handpiece Water Chilling Units, 33-waste water collection device, 34-coarse filter.
Referring to Fig. 2, the invention provides and a kind of transformer is carried out the system of on-the-spot gas phase dried, it comprises: oil tank of transformer 11, it is as the swept volume of dried, and the transformer body of processing to be dried is placed in the oil tank of transformer 11; The gas phase drying equipment, it is arranged on oil tank of transformer 11 outsides; With the connecting tubes that are used to be connected oil tank of transformer 11 gentle drying mutually settings.In system of the present invention, oil tank of transformer 11 is replaced vacuum tank in the conventional fixed formula gas phase dried system as swept volume.Because oil tank of transformer has been substituted the vacuum tank of fixed gas phase drying system, saved the capital construction installment work of vacuum tank being installed and carrying out, thereby the equipment cost and the installation cost of whole dried system are reduced greatly.In the actual production, by with the swept volume of oil tank of transformer, the formation of whole dried system is simplified, has saved about 2,000,000 yuan of equipment investment cost such as fixed vacuum tank as the dried transformer.
In order to guarantee the temperature of oil tank of transformer, oil tank of transformer 11 is provided with seal, and when its outside is surrounded by heat-insulation layer, also in the bottom of oil tank of transformer assisted heating device 21 is housed.Described assisted heating device 21 comprises for example infrared ray heating plate etc.
Preferably, in order to guarantee that further oil tank of transformer can carry out dried up hill and dale to the transformer in it, can carry out the reinforcement and the improvement of following aspect to oil tank of transformer: 1) improve the intensity of oil tank of transformer itself, make it that permanent deformation not take place under hot vacuum; 2) reliability of all seals on the raising oil tank of transformer, for example high anti-kerosene, high temperature tolerance; With 3) the kerosene guider is set in oil tank of transformer, so that the kerosene steam circulation that enters in the oil tank of transformer is unimpeded.The improvement of these aspects and setting, all dry completely in order to realize that oil tank of transformer carries out the transformer in it under the condition of high temperature.
In order to make the kerosene circulation of whole system unimpeded, also be lined with the base 23 of a certain altitude in the bottom of oil tank of transformer.Usually, described base is made by the metal material with high compressive strength.In the present embodiment, described base is a steel base.The upper surface of described steel base is an inclined surface, and described inclined surface is inclined to set the oil tank of transformer that is placed on the steel base along the length direction inclination of transformer.By adopting this to be provided with, can make the oil-out of oil tank of transformer be in low position, and then guarantee that the kerosene circulation of whole system is unimpeded.
In gas phase dried of the present invention system, for the gas phase drying equipment that is placed on oil tank of transformer 11 outsides, adopt the structure of modular, so that transportation and adapt to the variation of transformer erecting bed landform.According to technical scheme of the present invention, the gas phase drying equipment can be made the modular structure of an assembly, constitute and be convenient to system's each several part is assembled to simplify whole gas phase dried system, and then shortened the cycle of transformer gas phase dried.
Preferably, the present invention adopts external gas phase drying equipment is divided into a plurality of modules.Described a plurality of module comprises that vacuum condensation module 17, kerosene steam heated module 16, kerosene return module 19, refrigerating module 18, oil storage tank 27 and sump tank 26, and they are freely placed according to the landform of transformer erecting bed in the mode of module combinations.
In the present embodiment, for the ease of transportation and outside work, vacuum condensation module 17, kerosene steam heated module 16, kerosene can be returned module 19, refrigerating module 18 is made container structure, only need open during use on the container the door get final product, saved installation procedure and set-up time greatly.Simultaneously, because the gas phase drying equipment has adopted above-mentioned combined module type, make the installation of whole system and operation all become simple and easy and safe and reliable, thereby improved operating efficiency greatly.
In the connecting tube in native system, except that the connecting tube that connects described refrigerating module adopted the plastic flexible pipe of band steel wire, remaining connecting tube all adopted telescopic stainless steel flexible hose.That is to say that except the connecting tube of cooling device, all vacuum pipes and kerosene pipeline adopt stainless steel material entirely, purpose is to prevent that iron rust from entering in kerosene and the transformer, thereby guarantees the transformer quality.Simultaneously, adopt stainless steel pipes not only can make system attractive in appearance, light and handy, and make placement flexible more, convenience in position between each module of gas phase drying equipment.
Moreover, because the gas phase equipment for drying of native system and oil tank of transformer distance are very near, so the connecting tube that adopts is short more a lot of than the connecting tube that fixed gas phase equipment for drying is adopted, make when having saved pipeline material, also make the kerosene steam in course of conveying, reduce energy loss, shortened the transformer gas phase dried time to the greatest extent.
In the present embodiment, vacuum condensation module 17 mainly comprises vacuum unit 30, condenser 29 and collecting tank 28 etc.; Kerosene steam heated module 16 mainly comprises evaporator 24 and hotline heater 25 etc.; Kerosene returns module 19 and mainly comprises coarse filter 34 etc.; Refrigerating module 18 mainly comprises water tank 31 and handpiece Water Chilling Units 32, and is provided with connecting tube between the parts in described each module.
In order to make native system adapt to the environment of the erecting bed of transformer, the present invention adopts composite type refrigerating module 18, and described refrigerating module 18 is provided with handpiece Water Chilling Units 32 and water tank 31.Be provided with by this, solved the problem that the transformer erecting bed does not have the water source, also guaranteed the cooling effect of system simultaneously.Owing to adopt said structure, make the gas phase dried system of native system not be subjected to the restriction of installation environment, sufficient water source and thermal source promptly needn't be arranged, just can realize the gas phase dried.
Oil tank of transformer of the present invention also is provided with and is used for the gas circuit mouth and the oil circuit mouth that are connected with outside above-mentioned gas phase drying equipment.The gas circuit mouth comprises kerosene vapour inlet 14 and vacuum port 12, and kerosene vapour inlet 14 is arranged on the place, middle and lower part of oil tank of transformer side, and vacuum port 12 is arranged on the top of oil tank of transformer.
Wherein, be provided with the guide pipe (not shown) in the kerosene vapour inlet 14, can reach the middle bottom of oil tank of transformer by guide pipe kerosene steam, preferably, guide pipe is provided with the supporting baffle (not shown), be used for the kerosene steam that flows in the guide pipe is shunted, superheating phenomenon occur thereby solved kerosene vapour inlet place transformer body minor insulation.
The vacuum pipe that is connected with vacuum port is provided with dry air inlet 13, and wherein, 13 places are connected with the dry air generator (not shown) at dry air intake.
Described dry air generator is used for producing dry air after reaching the transformer dry termination condition, thereby removes the oil tank of transformer vacuum.Being provided with of this dry air generator solved in fixed gas phase dried and made the problem of making moist the dry good transformer insulated second time because of adopting the higher normal air of water content to remove vacuum, thereby realizes the transformer finish-drying.
The oil circuit mouth of oil tank of transformer of the present invention comprises kerosene first outlet 15 and kerosene second outlet 20.Kerosene first outlet 15 is arranged on apart from the oil tank of transformer bottom to have on the sidewall at certain altitude place, is used for the main oil-out of oil tank of transformer.Kerosene second outlet 20 is arranged on the bottom of oil tank of transformer, is used for all dischargings up hill and dale of oil with oil tank of transformer.
Generally speaking, in kerosene first outlet 15 of oil tank of transformer and kerosene second outlet 20, be separately installed with an accident oil discharging valve and a jar end oil discharging valve.Though kerosene second outlet is not very big, all discharging is clean with the oil in the oil tank of transformer can to utilize kerosene second outlet; And kerosene first outlet is provided with greatlyyer, but because this outlet and oil tank of transformer distance from bottom have certain height, so the oil in the oil tank of transformer 11 can not all flow out from this outlet.In native system, the main oil-out of kerosene first outlet as oil tank of transformer.
Export at kerosene first outlet and kerosene second and to be externally connected to kerosene and to return module 19.Described kerosene returns module and comprises coarse filter 34.
In order to monitor temperature in the dry run, native system also is provided with temperature control equipment 22, comprises the temperature sensor 22 that is installed on the oil tank of transformer.
Below, for characteristics and the advantage that embodies system of the present invention better, in conjunction with the present invention the formation of the system of gas phase dried is carried out at the transformer scene, will the installment work process of the on-the-spot gas phase dried of transformer system be described, described installment work process is as follows:
1) all seals on the inspection oil tank of transformer guarantee its high temperature resistant, anti-kerosene;
2) prepare kerosene and standby consumable material, as pump oil, screen pack or the like; And add kerosene and conduction oils to oil storage tank 27 and hotline heater 25 by the equipment regulation requirement.
3) oil tank of transformer is sling, and put preprepared base, make the oil tank of transformer length direction maintain certain gradient at its bottom pad;
4) after transformer body has assembled, insert temperature sensor on one's body, then temperature sensor is partly linked to each other with system electrical at transformer;
5) place the insulation test block respectively in the transformer body top and the bottom, be used for detecting after drying is finished the water content of insulation test block, be used to assess the drying effect of dry run;
6) between the drying equipment, carry out pipeline between drying equipment and the oil tank of transformer and be connected;
7) all electric control gears of open system;
8) oil tank of transformer 11 outsourcing insulation materials are installed, and assisted heating device 21 are installed in oil tank of transformer 11 bottoms;
9) start 30 pairs of oil tank of transformer of vacuum unit and vacuumize, and test oil tank of transformer leak rate.
After finishing above-mentioned work, just can utilize system of the present invention that the transformer that is placed in the oil tank of transformer is carried out kerosene oil-gas phase dried.
At inventive concept of the present invention, the present invention also provides a kind of the site installation transformer is realized the method that kerosene oil-gas is dry mutually, described method is that the transformer with processing to be dried is placed in the oil tank of transformer, utilize connecting tube that oil tank of transformer is connected with the gas phase drying equipment that is arranged on the oil tank of transformer outside, and adopt kerosene oil-gas phase drying method the withering method of the transformer in the oil tank of transformer.Therefore,, oil tank of transformer can be substituted the vacuum tank of fixed gas phase drying system, thereby reduce equipment cost, realize transformer being carried out the purpose of gas phase dried in the transformer erecting bed owing to adopt method of the present invention.
The present invention is roughly the same to the dry run and the fixed gas phase dry run of transformer, described process is divided into five operating procedures, be respectively: preparation process, heating steps, depressurization step, high vacuum step and releasing vacuum step, below, with reference to the accompanying drawings 3, above-mentioned steps is carried out following explanation.
The first step: preparation process R, utilize vacuum unit 30 at room temperature oil tank of transformer 11 to be vacuumized;
Second step: heating steps H, make the pressure in the oil tank of transformer reach certain value, hotline heater 25 begins in evaporator 24, to utilize progressively heating transformer device body of kerosene steam liberated heat to evaporator 24 heating.The kerosene steam runs into cold transformer after one's death on the one hand, is condensed into liquid, and discharges from the oil tank of transformer bottom, turns back to evaporator 24 then, and carries out heat cycles again.On the other hand along with the rising of transformer temperature, the kerosene steam can total condensation but is formed in oil tank of transformer and build up, but still exists with the form of gas.Along with the transformer body temperature in the oil tank of transformer slowly raises, the temperature of the insulating material of transformer is slowly risen, thereby, moisture in the insulating material also begins vaporization, and accumulates in the oil tank of transformer with the water vapour state, adds that again having a spot of air leaks in the oil tank of transformer, therefore, gas in the oil tank of transformer is mist at this moment, and simultaneously, pressure is also raising gradually in the oil tank of transformer.Next, described mist enters in the condensing unit of constant pressure and carries out condensation.After the condensation, the kerosene of liquid is different because of proportion with water, so in collecting tank 28 after sedimentation separation, water is exhausted from system in the waste water collection device 33, and kerosene liquid is utilized again and enters evaporator 24 once more and form second circulation, and permanent gases then is discharged in the atmosphere by vacuum unit 30.Utilize two above-mentioned circulations, transformer body progressively is heated.After being heated to certain hour, 11 pressure and evaporator 24 internal pressures meeting convergence balance in the oil tank of transformer, need carry out once or middle several times step-down, depressurization step IPL promptly, promptly cut off the kerosene steam channel that leads to oil tank of transformer, step-down is to utilize vacuum condensation module 17 and the pressure of realization reduction oil tank of transformer in the middle of described, helps the kerosene steam and enters in the oil tank of transformer.If the device of transformer has transformer oil on one's body, when the content of transformer oil in the mixing material in the evaporator surpass 10% (about), still-process is carried out in the heating of stopper body, different according to kerosene with the transformer oil vaporizing pressure, separate the transformer oil in the kerosene.After the purity of kerosene is improved like this, begin to continue Kerosene heater body process.
The 3rd step: depressurization step P, when the transformer body temperature reached certain value, the most of moisture in the TRANSFORMER INSULATING MATERIAL was got rid of, and then begins to stop kerosene and carries in evaporator.Utilize vacuum unit 30 that the mist in the oil tank of transformer is discharged, the kerosene that remains in the insulating material is evaporated again.
The 4th step: high vacuum step V, further utilize 30 pairs of oil tank of transformer of vacuum unit 11 to carry out height and vacuumize, the kerosene and the water that remain in the insulating material mid-deep strata are further evaporated, finish up to drying.
The 5th step: remove vacuum step, the step of promptly inflating E after reaching the transformer termination condition, is opened dry air generator earlier, removes the oil tank of transformer vacuum with dry air.
Open the population (population that does not have the jointing temp transducer) on the oil tank of transformer at last, take out the insulation test block, detect the water content of insulating part, overall process finishes.
As mentioned above, compare with dry processing of fixed gas phase, the dry processing of the dry handling process of gas phase of the present invention and fixed gas phase is roughly the same, but, because change has taken place in the interior environment of the dry drying system of processing of transformer gas phase of the present invention, simultaneously outside drying equipment is improved and adjusts, thereby very big change takes place in the parameter of respectively controlling that makes the present invention process dry run technology.
For the characteristics of the dry handling process of gas phase of the present invention are described, the main difference point of the dry handling process of gas phase of the present invention and fixed gas phase dry run is described now. Described main difference point is: 1) in the present invention, owing to adopted oil tank of transformer as swept volume, littler much than the volume of fixation type vacuum tank, so require high vacuum time to lack in the processing step, it is high that vacuum is wanted;
2) in the present invention, because that the equipment of kerosene steam and oil tank of transformer arrange distance is very near, so the kerosene conveyance conduit also is not so good as the desired such length of fixation type vacuum tank, so the present invention's energy loss in having reduced kerosene steam course of conveying;
3) in the present invention, after reaching transformer dry end condition, carry out the releasing vacuum step in the technological process of the present invention, namely inflate the step of E, in this step, open earlier the dry air generator with heater, use dry air, allow dry air enter in the oil tank of transformer, to remove the oil tank of transformer vacuum. This operation is with fixed difference: fixed gas phase drying is to adopt normal air to remove vacuum, but owing to water content in the normal air is higher, so made moist the dry good transformer insulated second time. Therefore, the releasing vacuum step in the method that the present invention adopts can avoid the transformer after dry the processing again to make moist, thereby has guaranteed the dry mass of transformer.
Simultaneously, in order to judge that whether carry out the dry transformer of processing has reached the required quality requirement of dry processing, judges: when treating the oil tank of transformer internal pressure near atmospheric pressure, open the population on the oil tank of transformer in the following ways, take off the insulation test block, detect the water content of insulation part. In the present invention, the insulation test block being set is in order to judge better the final water content of transformer.
Except judging the water content of transformer by the water content that detects the insulation test block, judge that comprehensively the final water content of transformer also needs to judge from the following aspect: transformer total drying time; Transformer dry finishes average temperature; The final vacuum of transformer dry; Transformer dry final outflow water rate is measured.
In sum, adopt system and method for the present invention except reaching above-mentioned goal of the invention, also have following advantage:
1) can shorten production cycle of transformer, compare with traditional field drying method, can shorten at least 1/2 drying time, thereby improved economic benefit;
2) compare with traditional field drying method, heat more even, drying is more thorough;
3) compare with traditional field drying method, because the kerosene steam itself is best cleaning agent, it can wash the transformer oil when overhauling, and can also remove the aging material that remains in the TRANSFORMER INSULATING MATERIAL, impurity etc., thereby has improved the clean degree of transformer;
4) compare with traditional field drying method, because the method for native system is easy to operate, the automation degree is higher, so reduced operator's labour intensity.
5) with fixed air mutually drying compare owing to adopt oil tank of transformer as swept volume, do not need to make in addition vacuum tank and structural construction cost usefulness, greatly reduce dry processing cost;
6) with fixed air mutually drying compare, it is small and exquisite that equipment is concentrated, convenient operation and monitoring;
7) with fixed air mutually drying compare, because being the module combined type structure, flexibility is stronger, adaptability is wider. Not only can be used for the dry transformer body of processing in intra-company, when maintenance transformer and assembling transformer, also can use.
Therefore, system and method provided by the present invention has solved in the on-the-spot problem that transformer is carried out the dry processing of gas phase of transformer assembling, in the situation of the quality that the raising transformer dry is processed, simplified the formation of the dry treatment system of gas phase, and the system each several part of making is easy to install and transportation.
Because in the situation that does not depart from the scope of the invention, can carry out various modifications and variations, therefore comprise in the above-mentioned explanation all technical characterictics shown in the accompanying drawing or content be construed as be explanation property and nonrestrictive.
Claims (21)
1. one kind the site installation transformer realized the system that kerosene oil-gas is dry mutually, it is characterized in that, this system is the oil tank of transformer (11) of the ccontaining transformer swept volume as the gas phase dried, and described oil tank of transformer (11) utilizes connecting tube and is arranged on its outside gas phase drying equipment and is connected.
2. system according to claim 1 is characterized in that, described gas phase drying equipment is assembled into modular.
3. system according to claim 2 is characterized in that, described gas phase drying equipment is made a gas phase drying equipment assembly module.
4. system according to claim 2, it is characterized in that, described gas phase drying equipment is made a plurality of modules, described a plurality of module comprises that vacuum condensation module (17), kerosene steam heated module (16), kerosene return module (19), refrigerating module (18), oil storage tank (27) and sump tank (26), connect by connecting tube between described a plurality of modules.
5. system according to claim 4 is characterized in that, described vacuum condensation module (17), kerosene steam heated module (16), kerosene return module (19) and refrigerating module (18) all adopts container structure.
6. system according to claim 4 is characterized in that,
Described vacuum condensation module (17) mainly comprises vacuum unit (30), condenser (29) and collecting tank (28) etc.;
Described kerosene steam heated module (16) mainly comprises evaporator (24) and hotline heater (25) etc.;
Described kerosene returns module (19) and mainly comprises coarse filter (34) etc.;
Described refrigerating module (18) mainly comprises water tank (31) and handpiece Water Chilling Units (32), and is provided with connecting tube between the parts in described each module.
7. ask 6 described systems according to right, it is characterized in that, described evaporator (24) is the external single evaporator, be used to realize kerosene evaporation and distillation, and described hotline heater (25) utilizes electricity that conduction oil is heated, and then described heat-conducting oil heating kerosene, thereby make liquid kerosene become the kerosene steam.
8. according to the arbitrary described system of claim 1,4 and 6, it is characterized in that described connecting tube adopts telescopic pipeline, connect to be used for compensation.
9. system according to claim 8 is characterized in that, in the described connecting tube, except that the connecting tube that connects described refrigerating module adopted the plastic flexible pipe of band steel wire, remaining connecting tube all adopted telescopic stainless steel flexible hose.
10. system according to claim 1 is characterized in that, described oil tank of transformer (11) also is provided with attemperator, and it is used for described oil tank of transformer is incubated.
11. system according to claim 10 is characterized in that, described attemperator comprises the heat-insulation layer that is arranged on the oil tank of transformer outside, and the assisted heating device (21) that is arranged on described oil tank of transformer bottom.
12. system according to claim 11, it is characterized in that, further, also be provided with the base that upper surface is an inclined surface (23) in described oil tank of transformer bottom, described inclined surface tilts along the length direction of oil tank of transformer, and the described oil tank of transformer that is placed on it is inclined to set.
13. system according to claim 1 is characterized in that, described oil tank of transformer also is provided with and is used for the gas circuit mouth and the oil circuit mouth that are connected with outside described gas phase drying equipment.
14. system according to claim 13, it is characterized in that, described gas circuit mouth comprises kerosene vapour inlet (14) and vacuum port (12), and described kerosene vapour inlet is arranged on the place, middle and lower part of oil tank of transformer side, and described vacuum port is arranged on the top of oil tank of transformer.
15. system according to claim 14, it is characterized in that, be provided with guide pipe in the described kerosene vapour inlet (14), and guide pipe is provided with supporting baffle, be used for the kerosene steam that flows in the guide pipe is shunted, thereby avoid kerosene vapour inlet (14) to locate to occur superheating phenomenon.
16. system according to claim 14 is characterized in that, and dry air inlet (13) is installed on the vacuum pipe that described vacuum port is connected, wherein, described dry air inlet (13) is connected with dry air generator.
17. system according to claim 13, it is characterized in that, described oil circuit mouth comprises kerosene first outlet (15) and kerosene second outlet (20), wherein said kerosene first outlet (15) is positioned at apart from the oil tank of transformer bottom and has on the sidewall at certain altitude place, main oil-out as oil tank of transformer in gas phase dried process, described kerosene second outlet (20) is arranged on the bottom of oil tank of transformer, is used for the oil of oil tank of transformer is all drained.
18. system according to claim 1 is characterized in that, further, described system also is provided with temperature control equipment, and wherein described oil tank of transformer is provided with temperature sensor (22), and temperature control equipment links to each other with the electric part of system.
19. one kind to the dry mutually method of site installation transformer realization kerosene oil-gas, it is characterized in that, the transformer of processing to be dried is placed in the oil tank of transformer (11), utilize connecting tube that oil tank of transformer (11) is connected with the gas phase drying equipment that is arranged on the oil tank of transformer outside, and adopt kerosene oil-gas phase drying method that the transformer in the oil tank of transformer is carried out dried.
20. method according to claim 19 is characterized in that, described kerosene oil-gas phase drying method comprises preparation process, heating steps, depressurization step, high vacuum step and removes vacuum step; Wherein, in described releasing vacuum step, the dry air that utilizes dry air generator to produce is removed vacuum to oil tank of transformer.
21. method according to claim 19 is characterized in that, in order to guarantee treated transformer finish-drying, also comprises the method for the final water content of comprehensive judgement transformer, the determination methods that is adopted comprises following aspect:
1) transformer total drying time;
2) transformer dry finishes mean temperature;
3) the final vacuum degree of transformer dry;
4) transformer dry product final outflow water rate;
5) transformer dry insulation test block moisture measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010265406.4A CN102054577B (en) | 2009-10-30 | 2010-08-25 | System and method for realizing kerosene vapor-phase drying to on-site assembly transformer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910205596.8 | 2009-10-30 | ||
| CN200910205596 | 2009-10-30 | ||
| CN201010265406.4A CN102054577B (en) | 2009-10-30 | 2010-08-25 | System and method for realizing kerosene vapor-phase drying to on-site assembly transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102054577A true CN102054577A (en) | 2011-05-11 |
| CN102054577B CN102054577B (en) | 2014-04-30 |
Family
ID=43958796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010265406.4A Active CN102054577B (en) | 2009-10-30 | 2010-08-25 | System and method for realizing kerosene vapor-phase drying to on-site assembly transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102054577B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710809A (en) * | 2015-08-12 | 2017-05-24 | 特变电工沈阳变压器集团有限公司 | Vapor-phase drying system and processing method of on-site +/-800KV converter transformer in power station |
| CN111829299A (en) * | 2020-07-14 | 2020-10-27 | 沈阳诚桥真空设备有限公司 | Solvent spray vapor phase drying method, equipment and system |
| CN113834312A (en) * | 2021-10-11 | 2021-12-24 | 山东泰开互感器有限公司 | Gas phase drying process and device for oil-immersed inverted current transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002280243A (en) * | 2001-03-21 | 2002-09-27 | Fuji Electric Co Ltd | Method and device for drying electrical apparatus |
| CN1440827A (en) * | 2002-02-28 | 2003-09-10 | 威廉·海德里希真空设备两合公司 | Preparing device for transformer |
| CN1705144A (en) * | 2004-06-01 | 2005-12-07 | 肇庆市风华锂电池有限公司 | Method and apparatus for battery vacuum sealing |
| CN101457154A (en) * | 2008-12-29 | 2009-06-17 | 保定天威集团有限公司 | Waste kerosene regeneration method in transformer kerosene vapor phase drying process |
| CN102194564A (en) * | 2010-03-09 | 2011-09-21 | 华北电力科学研究院有限责任公司 | System and method for drying transformer body |
-
2010
- 2010-08-25 CN CN201010265406.4A patent/CN102054577B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002280243A (en) * | 2001-03-21 | 2002-09-27 | Fuji Electric Co Ltd | Method and device for drying electrical apparatus |
| CN1440827A (en) * | 2002-02-28 | 2003-09-10 | 威廉·海德里希真空设备两合公司 | Preparing device for transformer |
| CN1705144A (en) * | 2004-06-01 | 2005-12-07 | 肇庆市风华锂电池有限公司 | Method and apparatus for battery vacuum sealing |
| CN101457154A (en) * | 2008-12-29 | 2009-06-17 | 保定天威集团有限公司 | Waste kerosene regeneration method in transformer kerosene vapor phase drying process |
| CN102194564A (en) * | 2010-03-09 | 2011-09-21 | 华北电力科学研究院有限责任公司 | System and method for drying transformer body |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710809A (en) * | 2015-08-12 | 2017-05-24 | 特变电工沈阳变压器集团有限公司 | Vapor-phase drying system and processing method of on-site +/-800KV converter transformer in power station |
| CN111829299A (en) * | 2020-07-14 | 2020-10-27 | 沈阳诚桥真空设备有限公司 | Solvent spray vapor phase drying method, equipment and system |
| CN111829299B (en) * | 2020-07-14 | 2023-10-27 | 沈阳诚桥真空设备有限公司 | Solvent spray vapor phase drying method, equipment and system |
| CN113834312A (en) * | 2021-10-11 | 2021-12-24 | 山东泰开互感器有限公司 | Gas phase drying process and device for oil-immersed inverted current transformer |
| CN113834312B (en) * | 2021-10-11 | 2022-10-04 | 山东泰开互感器有限公司 | Gas phase drying process and device for oil-immersed inverted current transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102054577B (en) | 2014-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101439529B (en) | Microwave vacuum drying and carbonizing device and method for wood | |
| CN201357467Y (en) | Microwave -vacuum drying carbonizing device for wood | |
| CN102054577B (en) | System and method for realizing kerosene vapor-phase drying to on-site assembly transformer | |
| CN102194564B (en) | System and method for drying transformer body | |
| CN202777833U (en) | Mechanical vapor recompression evaporator | |
| CN201177439Y (en) | Electrothermal vacuum dryer water-receiving plate structure | |
| CN101216239B (en) | Electrothermic vacuum dryer with water-receiving plate structure | |
| CN110081726A (en) | A kind of metal smelt heat recovery apparatus | |
| CN207570206U (en) | A kind of drying kettle of alcohol supercritical methanol technology production aeroge | |
| CN214528936U (en) | Environment-friendly efficient energy-saving brewing equipment | |
| CN204857384U (en) | On --spot 800kV in power station trades rheologic vapour phase drying system | |
| WO2011050577A1 (en) | System and method for realizing kerosene gas phase drying to transformers assembled on-site | |
| CN207745541U (en) | The alcohol recovery unit of aeroge production | |
| CN207848957U (en) | Cryogenic natural gas recycling and processing device | |
| CN219788691U (en) | Cooking device for production | |
| CN206787189U (en) | Liquaemin low-temperature vacuum drying case | |
| CN205843084U (en) | A kind of panel solar of efficient energy-conserving and environment-protective | |
| CN205965058U (en) | Purification of high boiling point chemical reagent , filling integral type equipment | |
| CN101228965A (en) | Vacuum drier and method of using the same to parch fresh pericarpium zanthoxyli and recycling naphtha | |
| CN103882186A (en) | Vacuum-pumping device of RH (Ruhrstahl Hereaeus) refining furnace and use method thereof | |
| CN105129886B (en) | Waste Water Treatment | |
| CN201177438Y (en) | Electric heating vacuum dryer cooling reclamation water elbow device | |
| RU209875U1 (en) | MOBILE APPARATUS FOR STEAM DISTILLATION OF ESSENTIAL OIL RAW MATERIALS | |
| CN109764735B (en) | Vacuum cold and hot double-source generator | |
| CN101231138A (en) | Cooling water-recovering apparatus of electro-heat vacuum drier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |