KR100927799B1 - A simultaneously removal method of residual pcbs and electrical insulation oil immersed transformer - Google Patents
A simultaneously removal method of residual pcbs and electrical insulation oil immersed transformer Download PDFInfo
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- KR100927799B1 KR100927799B1 KR1020090018364A KR20090018364A KR100927799B1 KR 100927799 B1 KR100927799 B1 KR 100927799B1 KR 1020090018364 A KR1020090018364 A KR 1020090018364A KR 20090018364 A KR20090018364 A KR 20090018364A KR 100927799 B1 KR100927799 B1 KR 100927799B1
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- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/321—Insulating of coils, windings, or parts thereof using a fluid for insulating purposes only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/047—Breaking emulsions with separation aids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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Abstract
Description
본 발명은 유입용 전력기기에 잔류한 PCBs와 전기 절연유의 동시 제거방법에 관한 것이다. 더욱 상세하게, 본 발명은 감압가열과 진공펌프를 이용하여 PCBs와 전기 절연유가 잔류한 주상 66kV, 154kV, 345kV 및 765kV 등 유입용 전력기기에 잔류한 PCBs를 전기 절연유와 동시에 제거하는 방법에 관한 것이다. The present invention relates to a method for simultaneously removing PCBs and electrical insulating oil remaining in an inflow power device. More specifically, the present invention relates to a method for removing PCBs remaining in inlet power equipment such as 66kV, 154kV, 345kV and 765kV in which PCBs and electrical insulating oil remain by using a vacuum heating and vacuum pump at the same time. .
"PCBs"는 폴리크로리네이티드 비페닐(Poly Chlorinated Biphenyls)의 약어로서, 유동성, 전기절연성과 열전도성이 양호하며 난연성이기 때문에 1970년대에 유입용 전력기기의 전기 절연유로 대량 사용된 바 있다. 그러나 PCBs는 환경호로몬 물질로 판명되어 현재는 환경부 "지정 폐기물"과 "잔류성 유기오염물질"로 지정되어 있으므로 유입용 전력 기기를 폐기처분할 때는 PCBs를 규제치 이하로 제거하여야 한다.
"유입용 전력기기"는 유입용 송변전 및 배전용 승압과 감압에 사용하는 변압기, 유입차단기, 분로 리액터, 전위변상기, 방전코일, 중성점 접지리액터, 직렬리액터, 콘덴셔 및 캐퍼시터(Capacitor)를 말하는 것으로, 유입용 전력기기 중 대부분을 차지하는 유입용 변압기는 함(케이스), 철심권선과 전기 절연유로 구성되어 있으며, 철심권선은 규소강판, 구리선과 절연지로 구성되어 있다.
일반적으로 유입용 전력기기의 전기절연유에 PCBs가 잔류한 가장 뚜렷한 이유는 과거 전기절연유로 대량 사용하였던 PCBs가 환경호로몬으로 밝혀진 1980년대 모두 수거 폐기 처리된 후 새로운 전기절연유로 교체되었으며, 이때에 유입용 전력기기의 내부를 완전히 세정하여 제거하지 않아 PCBs가 변압기 내부에 잔류하였기 때문이다.
PCBs로 오염된 유입용 전력기기의 무해화 처리에 관한 종래의 기술은 PCBs로 오염된 유입용 전력기기의 내부재를 해체하거나 절단한 후 세정탱크에 세정액과 함께 넣고 세정하여 PCBs를 제거하는 세정처리기술과 유입용 전력기기의 내부재를 해체하거나 절단하여 감압가열탱크에 넣고 감압가열하여 PCBs를 증발분리시켜 제거하는 기술이 있다.
즉, 종래의 기술은 감압가열처리나 세정처리방법 중에서 한 가지 방법만 선택하여 유입용 전력기기에 오염된 PCBs를 제거하는 기술로서, 별도의 감압가열탱크와 세정처리탱크를 제작 설치하여야만 하는데, 세정처리에 관한 종래의 기술로서 구체적으로 발표된 문헌이나 특허는 없는 실정이며, 감압가열처리방법에 관한 논문은 일본 電氣評論 2008. 9월호 "변압기 리싸이클센터(PCB 처리)의 개요"가 있다.
감압가열 처리방법에서는 감압탱크를 제작하고 유입용 전력기기를 해체, 절단한 후 감압탱크에 넣어 처리하기 때문에 해체, 절단비용과 감압탱크의 제작비가 많이 소요되며, PCBs로 오염된 변압기의 무해화처리 시간이 24시간 정도 소요되어 길다. 또한, 감압 탱크에서 기화된 PCBs와 전기 절연유를 흡수제거할 때 새로운 전기절연유를 사용하기 때문에 사용한 전기절연유만큼 폐기물이 더 많이 발생하는 단점이 있었다."PCBs" is an abbreviation of Poly Chlorinated Biphenyls. In the 1970s, "PCBs" were used as electrical insulating oils for inflow power equipment because of their good fluidity, electrical insulation, thermal conductivity, and flame retardancy. However, because PCBs have been identified as environmental hormones and are currently designated as "designated waste" and "residual organic pollutants" by the Ministry of Environment, PCBs should be removed to below the regulation when disposing of incoming power equipment.
"Inflow Power Equipment" refers to transformers, inlet breakers, shunt reactors, potential transformers, discharge coils, neutral ground reactors, series reactors, condensers and capacitors used for boosting and decompressing power transmission and distribution. The inlet transformer, which occupies most of the inlet power equipment, is composed of a box, a core wire, and an electric insulating oil, and the core wire is composed of a silicon steel sheet, a copper wire, and an insulating paper.
In general, the most obvious reason for PCBs remaining in the electric insulating oil of the inflowing power equipment is that the PCBs, which were used in the past as a large amount of electric insulating oil, were collected and disposed of in the 1980s when they were identified as environmental hormones, and then replaced with new electric insulating oil. This is because PCBs remained inside the transformer because the inside of the power equipment was not completely cleaned and removed.
Conventional techniques related to the detoxification of inflow power equipment contaminated with PCBs are dismantled or cut inside of the inflow power equipment contaminated with PCBs, followed by cleaning with a cleaning solution in a cleaning tank to remove PCBs. Technology and technology to dismantle or cut the inner material of the inflow power equipment into a decompression heating tank and heat it under reduced pressure to remove and remove PCBs by evaporation.
In other words, the conventional technology is to remove PCBs contaminated by inflow power equipment by selecting only one method from a vacuum heating treatment or a cleaning treatment method, and a separate pressure heating tank and a cleaning treatment tank must be manufactured and installed. No literature or patent has been specifically published as a related art in the related art, and a paper on a reduced pressure heating treatment method is published in Japanese September 2008 "Overview of Transformer Recycling Center (PCB Treatment)".
In the decompression heating method, the decompression tank is manufactured, and the inflow power equipment is dismantled and cut and then put into the decompression tank, so it is expensive to dismantle, cut and manufacture the decompression tank. It takes about 24 hours and is long. In addition, since the new electrical insulating oil is used to absorb and remove vaporized PCBs and electrical insulating oil in the decompression tank, more waste is generated than the used electrical insulating oil.
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본 발명은 상기한 종래기술의 문제점을 해결하기 위한 것으로서, 유입용 전력기기의 내부재를 해체하거나 절단하지 않고, 또한 별도의 감압가열탱크나 세정처리탱크를 제작 설치하지 않고 무해화 처리를 할 수 있으며, 변압기함을 감압가열처리 장치와 세정처리 장치로 병용하여 유입용 전력기기에 잔류한 PCBs와 전기절연유를 동시에 제거할 수 있는 방법의 제공을 그 목적으로 하고 있다.
따라서 본 발명은 무해화 처리하는 변압기의 크기와 개수에 관계없이 많은 수의 PCBs로 오염된 유입용 전력기기를 효율적이고 경제적으로 처리할 수 있는 방법을 제공하기 위한 것이다.
또한, 본 발명은 변압기 무해화 처리 후 PCBs로 오염된 폐기물의 양을 줄이기 위하여 기화된 PCBs와 전기절연유를 1차로 냉각 응축하여 제거하고, 2차는 미량의 미세한 PCBs 액적(mist)은 증발온도와 비열이 낮은 용매를 사용하여 PCBs 및 전기절연유를 흡수하여, 용매와 PCBs는 진공 증발분리하고, 분리된 용매는 연속하여 흡수제로 사용하고, 증발분리기에 잔류한 PCBs와 전기절연유를 회수함으로써 폐기물의 양이 종래의 기술보다 소량 발생하게 되어 경제성이 우수한 유입용 전력기기에 잔류한 PCBs와 전기절연유를 동시에 제거할 수 있는 방법을 제공하기 위한 것이다.The present invention is to solve the above problems of the prior art, it is possible to perform the detoxification process without dismantling or cutting the inner material of the inflow power equipment, and without making and installing a separate pressure reduction heating tank or cleaning treatment tank. In addition, the purpose of the present invention is to provide a method for simultaneously removing the PCBs and the electric insulating oil remaining in the inflow power equipment by using a transformer box as a pressure reduction heating and cleaning treatment device.
Accordingly, the present invention is to provide a method for efficiently and economically treating an inflow power device contaminated with a large number of PCBs regardless of the size and number of transformers to be harmless.
In addition, the present invention is to remove the vaporized PCBs and electrical insulating oil by the first cooling condensation to reduce the amount of waste contaminated with PCBs after the transformer detoxification process, the second is a trace amount of fine PCBs (mist) evaporation temperature and specific heat The lower solvent is used to absorb PCBs and electrical insulating oil, so that the solvent and PCBs are vacuum evaporated, the separated solvent is continuously used as an absorbent, and the amount of waste is recovered by recovering the PCBs and electrical insulating oil remaining in the evaporator. It is to provide a method that can be removed at the same time the PCBs and the electrical insulating oil remaining in the inflow power equipment that is generated in a smaller amount than the conventional technology.
본 발명에서 변압기함을 감압탱크와 세정탱크로 병용하여 유입용 전력기기에 잔류한 PCBs와 전기절연유의 동시 제거할 수 있는 방법은 유입용 전력기기인 변압기의 내부에 잔류하는 PCBs와 전기절연유를 감압 가열에 의해 기화시켜서 동시에 증발 및 분리하여 제거하는 방법으로서, 위 변압기 자체를 감압탱크로 사용하여 0.05~0.5토르의 압력을 유지하고, 200~300℃의 온도에서 그 내부에 잔류하는 PCBs와 전기절연유를 기화시키는 단계, 위 기화된 PCBs와 전기절연유를 상온으로 냉각 및 응축시키는 단계, n-헥산, 벤젠 또는 광유 중 하나 이상인 용매를 흡수제로 하여 분산시킴으로써 위 단계에서 냉각 및 응축되지 않은 PCBs와 전기절연유를 흡수하는 단계, 위 용매는 증발 분리시켜 흡수제로 재사용하고 흡수된 PCBs와 전기절연유를 회수하는 단계로 이루어지는 것을 특징한다.
구체적으로 기재하면, 변압기를 무해화 처리하기 위한 처음단계는 폐변압기에 포함되어 있는 PCBs에 오염된 전기절연유를 감압가열장치에 설치된 감압펌프 이용하여 저장탱크로 이송하여 대부분의 양을 제거한다. 그리고 변압기의 바닥, 철심과 권선의 틈사이에 소량으로 잔류한 PCBs와 전기절연유는 용매에 의하여 감압가열장치에서 세정처리와 감압가열처리를 하여 증기화한 후 분리 제거 처리함으로써 PCBs의 제거효율을 향상시키므로 별도로 감압탱크와 세정탱크를 제작, 설치할 필요가 없는 경제적인 방법이다.
본 발명에서 세부적인 해결수단은 유입용 전력기기인 변압기 뚜껑 부착된 붓싱을 떼어낸 다음, 감압가열장치를 장착함으로써 그 목적을 달성할 수 있다.In the present invention, a method for simultaneously removing the PCBs and the electric insulating oil remaining in the inlet power equipment by using the transformer box as a decompression tank and a cleaning tank is to decompress the PCBs and the electric insulating oil remaining in the transformer as the inlet power equipment. It is a method of vaporizing by heating and evaporating and separating and removing at the same time.The above transformer itself is used as a decompression tank to maintain a pressure of 0.05 to 0.5 torr, and the PCBs and electrical insulating oil remaining therein at a temperature of 200 to 300 ° C. Vaporizing step, cooling and condensing the above-mentioned PCBs and electrical insulating oil to room temperature, PCBs and electrical insulating oil not cooled and condensed in the above step by dispersing a solvent of at least one of n-hexane, benzene or mineral oil as an absorbent Absorption step, the solvent is separated by evaporation to reuse as an absorbent and recover the absorbed PCBs and electrical insulating oil It is characterized by.
Specifically, the first step to detoxify the transformer is to remove most of the amount of electrical insulating oil contaminated by the PCBs contained in the waste transformer to the storage tank by using a decompression pump installed in the decompression heater. And PCBs and electrical insulating oil which remain in small amount between the bottom of transformer, iron core and winding are vaporized by washing and pressure-reducing heating process in a pressure-reduction heating device by solvent and then removed and removed to improve PCBs removal efficiency. It is economical method that does not need to manufacture and install pressure reduction tank and cleaning tank separately.
The detailed solution in the present invention can achieve the object by removing the bushing attached to the transformer lid of the inflow power equipment, and then equipped with a reduced pressure heating device.
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상술한 바와 같은 본 발명의 유입용 전력기기에 잔류한 PCBs와 전기절연유를 동시에 제거할 수 있는 방법은 다음과 같은 효과를 가진다.
첫째, 본 발명은 별도의 감압탱크를 제작, 설치하지 않고 변압기 용기를 감압탱크로 사용하여 잔류한 PCBs와 전기 절연유를 동시에 제거하기 때문에 간편할 뿐 아니라 장치의 제작비용이 소요되지 않는 장점이 있다.
둘째, 본 발명은 PCBs로 오염된 대형변압기 등의 운반이 곤란한 유입용 전력기기를 현장에서 해체하지 않고도 PCBs를 제거할 수 있는 장점이 있다.
셋째, 본 발명은 기화된 PCBs의 흡수제가 유기용매이기 때문에 제거공정 중에 폐기물량이 증가하지 않게 된다.
넷째, 본 발명은 PCBs에 오염된 유입용 전력기기를 제거 후에 다시 재사용할 수 있다는 장점이 있다.
다섯째, 본 발명은 변압기를 해체하거나, 해체하지 않고도 2대 이상의 변압기를 동시에 처리할 수 있는 효과가 있다.As described above, a method of simultaneously removing PCBs and electrical insulating oil remaining in the inflow power device of the present invention has the following effects.
First, the present invention is not only easy to remove the remaining PCBs and electrical insulating oil at the same time using a transformer vessel as a pressure reduction tank without making and installing a separate pressure reduction tank, it has the advantage that the production cost of the device is not easy.
Second, the present invention has the advantage of removing the PCBs without dismantling the inlet power equipment difficult to transport such as large transformers contaminated with PCBs in the field.
Third, the present invention does not increase the amount of waste during the removal process because the absorbent of vaporized PCBs is an organic solvent.
Fourth, the present invention has the advantage that can be reused again after removing the incoming power equipment contaminated with PCBs.
Fifth, the present invention has the effect of dismantling or dismantling the transformer can simultaneously process two or more transformers.
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본 발명은 유입용 전력기기에 잔류한 PCBs와 전기절연유를 증발 분리시키는데 있어서 가열온도를 낮게 하고, 제거시간을 단축하기 위하여 감압가열에 의하여 PCBs를 증발 분리한 후 냉각 응축시켜 이들을 동시에 제거하는 방법인 것이다.
즉, 본 발명은 종래의 기술과 감압 가열하는 것은 유사하지만, 감압가열방법과 기화된 물체를 흡수하여 제거하는 방법과 순서, 흡수제의 종류가 완전히 다른 공정으로 구성되었으며, 감압가열 처리 후에도 PCBs오염된 폐기물 양이 종래의 폐기물 양보다 증가되지 않아 경제적이고 신속하게 PCBs를 제거할 수 있는 방법인 것이다.
본 발명의 방법에 의하면, PCBs가 오염된 유입용 전력기기에서 대부분 차지하고 있는 유입용 변압기에서 먼저 오염된 전기절연유를 제거한 다음에 제거되지 않은 잔류한 전기절연유를 제거하기 위하여 변압기의 뚜껑에 장착된 붓싱을 분해하여 제거하고, 붓싱을 제거한 구멍 또는 변압기 상부에 알맞게 제작된 뚜껑이나 용기의 구멍에 감압가열 장치를 연결한다. 가열 열선은 변압기함의 외벽과 내벽에 용량에 알맞은 열선을 설치하고, 외벽은 내열보온재로 단열시켜 변압기 내부의 방열을 방지한다.
여기서, 상기의 감압가열장치 또는 감압가열 PCBs 무해화장치의 구성은 첨부한 도 1에서와 같고, 본 발명의 방법에 의하면, PCBs 1차 냉각응축기(3)에서는 변압기(1)에서 기화된 PCBs 및 전기절연유를 상온까지 냉각시켜 기상의 PCBs와 전기절연유를 냉각 응축시켜 분리 제거하게 되며, 1차 냉각응축기(3)에서 제거되지 않은 PCBs는 PCBs 및 전기절연유 흡수탑(6)에서 완전히 제거되게 된다.
상기 PCBs 및 전기절연유 흡수탑(6)의 기능은 탑 상부에 용매분사노즐(5)이 부착되어 노즐에서 용매가 압력분사하게 되고, 미세하게 무화된 용매에 기상의 PCBs와 전기절연유의 흡수를 용이하게 하며, 상기 1차 냉각응축기(3)의 기능을 보완하기 위한 안전장치로 사용된다.
상기 PCBs 및 전기절연유 흡수탑(6)에서 PCBs 및 전기절연유에 오염된 용매는 증발분리기(10)로 이송되면 용매는 증발시켜 2차 냉각응축기(20)에서 응축하여 용매탱크(11)로 이송되어 연속해서 PCBs 및 전기절연유의 흡수에 재사용하며, 잔류한 PCBs와 전기절연유는 PCBs 및 전기절연유 회수저장탱크(21)로 수거되어 최종적으로 화학 처리된다.
붓싱을 제거한 변압기(1)의 뚜껑에는 온도계(16), 압력계(17) 및 가열장치(2)의 가열열선을 장착하며, 가열열선과 압력계는 인터록(inter-lock)되고, 가열열선의 작동은 압력이 5토르 이하에서 작동하도록 조절하여 PCBs의 증발분리 효율을 상승시키고 과열에 의한 변압기의 폭발을 방지할 수 있다.
이하, 실시예에 의하여 본 발명을 보다 구체적으로 설명하고자 한다. 이들 실시예는 오로지 본 발명을 설명하기 위한 것으로, 본 발명의 요지에 따라 본 발명의 범위가 이들 실시예에 국한되지 않는다는 것은 당 업계에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.
실시예
변압기에 잔류한 PCBs와 전기절연유의 제거방법은 변압기 상부의 뚜껑에 부착된 붓싱을 제거하고 감압가열장치를 연결 설치한 후 다음 공정에 따라 제거작업을 실시하였다.
감압가열장치를 연결하기 전에 변압기 내부에 충전된 전기절연유는 펌프 등을 이용하여 최대한 제거를 하였다.
1. 감압가열장치의 감압펌프를 가동하여 압력이 0.05토르 이하로 감압될 때까지 공기를 배출시켰다.
2. 0.05토르 이하로 감압한 후 가열열선에 전기를 공급하여 승온하였다.
3. 압력이 0.5토르 이하로 유지하도록 가열하였다.
4. 온도 200~300℃에서 7시간 동안 감압 가열하였다.
5. 압력이 0.05토르 이하로 지속될 때 가열을 멈추었다.
6. 공기를 50~75토르로 주입하고, 다시 0.05토르 이하로 감압하여 변압기 내부에 잔류한 기상 PCBs를 배출하였다.
7. 상온까지 냉각되면 상압상태로 하여 변압기 내부의 PCBs 제거상태를 시험하였다.
8. 마지막으로 유기용매(n-헥산)로 세정처리를 하여 변압기 내부의 최종세정액에 함유한 PCBs의 농도를 분석하여 세정여부를 판정하였다.
상기의 방법에 의해서 기화된 PCBs와 전기절연유를 제거하는 흡수장치에 사용한 유기용매는 n-헥산, 벤젠 또는 광유를 사용하였으며, 분석은 환경부 PCBs분석법에 의거 수행하였다.
감압가열 처리시 변압기 외부에서 발생하는 미량의 유기탄화수소 등의 유해가스는 후드를 설치하여 후두 배출구에 내부 감압가열시 설치한 냉각응축기와 환경오염 방지시설과 환경오염 감시장치 등을 설치하여 대기 중에는 유기탄화수소 등의 유해가스가 배출되지 않도록 하였다. The present invention is to reduce the heating temperature in the evaporative separation of the PCBs and the electric insulating oil remaining in the inlet power equipment, and to remove the PCBs by evaporation and cooling condensation by vacuum heating in order to reduce the removal time at the same time to remove them will be.
That is, the present invention is similar to the prior art heating under reduced pressure, but the vacuum heating method, the method and sequence of absorbing and removing the vaporized object, and the type of absorbent are completely different, the PCBs are contaminated even after the reduced pressure heating process Since the amount of waste is not increased compared to the amount of waste in the past, it is a way to remove PCBs economically and quickly.
According to the method of the present invention, a bushing mounted on a lid of a transformer to remove contaminated electric insulating oil first from an inflow transformer occupying most of the inflow power equipment contaminated with PCBs, and then to remove the remaining electric insulating oil that has not been removed. Disassemble and remove it, and connect the reduced pressure heating device to the hole that removes the bushing or the hole of the lid or container suitable for the upper part of the transformer. Heating heating wire is installed on the outer wall and inner wall of the transformer box according to the capacity, and the outer wall is insulated with heat-resistant insulation to prevent heat radiation inside the transformer.
Here, the configuration of the decompression heating device or the decompression heating PCBs detoxification device is the same as in FIG. The electrical insulating oil is cooled to room temperature to separate and remove the vapor phase PCBs and the electrical insulating oil by cooling condensation. PCBs not removed from the primary cooling condenser 3 are completely removed from the PCBs and the electrical insulating oil absorption tower 6.
The function of the PCBs and the electrically insulating oil absorption tower 6 is that the solvent spray nozzle 5 is attached to the top of the tower so that the solvent is sprayed at the nozzle, and the absorption of the PCBs and the electrical insulating oil in the gas phase in the finely atomized solvent is easy. It is used as a safety device to supplement the function of the primary cooling condenser (3).
When the solvent contaminated with the PCBs and the electrical insulating oil in the PCBs and the electrical insulating oil absorption tower 6 is transferred to the
The lid of the transformer (1) with the bushings removed is equipped with a heating wire of a thermometer (16), a pressure gauge (17) and a heating device (2). The heating heating wire and the pressure gauge are inter-locked. The pressure can be adjusted to operate below 5 Torr to increase the evaporation efficiency of PCBs and to prevent the explosion of the transformer due to overheating.
Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention, and it will be apparent to those skilled in the art that the scope of the present invention is not limited to these examples according to the gist of the present invention.
Example
To remove PCBs and electrical insulating oil remaining in the transformer, the bushing attached to the lid of the transformer was removed, and the pressure reducing heater was connected and installed.
Before connecting the reduced pressure heater, the electric insulating oil charged inside the transformer was removed as much as possible using a pump.
1. The pressure reduction pump of the pressure reduction heater was operated to discharge air until the pressure was reduced to 0.05 Torr or less.
2. After the pressure was reduced to 0.05 Torr or less, the heating was heated by supplying electricity to the heating wire.
3. Heated to maintain pressure below 0.5 Torr.
4. Heated under reduced pressure for 7 hours at a temperature of 200 ~ 300 ℃.
5. The heating was stopped when the pressure continued below 0.05 Torr.
6. Air was injected at 50 to 75 Torr, and the pressure was reduced to 0.05 Torr or less again to discharge vapor phase PCBs remaining in the transformer.
7. After cooling to room temperature, the condition of PCBs removal in the transformer was tested under normal pressure.
8. Finally, the organic solvent (n-hexane) was cleaned and analyzed by analyzing the concentration of PCBs in the final cleaning solution inside the transformer.
The organic solvent used in the absorption device to remove the vaporized PCBs and electrical insulating oil by the above method was using n-hexane, benzene or mineral oil, the analysis was performed according to the PCBs analysis of the Ministry of Environment.
During the vacuum heating process, a small amount of harmful gases such as organic hydrocarbons generated from the outside of the transformer are installed with a hood. No harmful gases such as hydrocarbons are discharged.
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도 1은 본 발명에 따른 유입용 전력기기에 잔류한 PBCs와 전기 절연유의 동시 제거방법을 수행하기 위한 감압가열장치의 개략도이다. 1 is a schematic diagram of a pressure reduction heating apparatus for performing a method of simultaneously removing the PBCs and electrical insulating oil remaining in the inflow power equipment according to the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
1 ---- 변압기1 ---- transformer
2 ---- 변압기 가열장치2 ---- transformer burner
3 ---- 1차 냉각응축기3 ---- Primary cooling condenser
4 ---- 1차 진공펌프4 ---- primary vacuum pump
5 ---- 용매분사노즐5 ---- solvent spray nozzle
6 ---- PCBs 및 전기 절연유 흡수탑6 ---- PCBs and electrical insulating oil absorption tower
7 ---- 용매 분사펌프7 ---- solvent injection pump
8 ---- 폐용매 이송펌프8 ---- Waste solvent transfer pump
9 ---- PCBs 및 전기 절연유 회수조9 ---- PCBs and electric oil recovery tank
10 ---- 증발분리기10 ---- Evaporator
11 ---- 용매탱크11 ---- Solvent Tank
12 ---- 액적 분리기12 ---- droplet separator
13 ---- 대기오염방지 장치13 ---- Air pollution prevention device
14 ---- 대기오염 감시장치14 ---- Air Pollution Monitoring System
15 ---- 전기 콘트롤 장치15 ---- electric control device
16 ---- 온도계16 ---- thermometer
17 ---- 압력계17 ---- pressure gauge
18 ---- 용매 저장 탱크18 ---- solvent storage tank
19 ---- 용매 보충 펌프19 ---- solvent replacement pump
20 ---- 2차 냉각응축기20 ---- Secondary Cooling Condenser
21 ---- PCBs 및 전기 절연유회수저장탱크21 ---- PCBs and electric insulated recovery tank
22 ---- PCBs 및 전기 절연유 회수펌프22 ---- PCBs and electrical insulating oil recovery pump
23 ---- 용매이송펌프23 ---- solvent transfer pump
24 ---- 2차 진공펌프24 ---- Secondary vacuum pump
25 ---- 폐액 회수펌프 25 ---- Waste liquid recovery pump
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| KR1020090018364A KR100927799B1 (en) | 2009-03-04 | 2009-03-04 | A simultaneously removal method of residual pcbs and electrical insulation oil immersed transformer |
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| KR1020090018364A KR100927799B1 (en) | 2009-03-04 | 2009-03-04 | A simultaneously removal method of residual pcbs and electrical insulation oil immersed transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102417702B1 (en) | 2021-01-06 | 2022-07-07 | (주)유엠로직스 | System and method for optimal processing data calculation of PBCs removal based on explainable AI |
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| KR200389360Y1 (en) | 2005-04-04 | 2005-07-14 | 정상철 | Influx transformer filtration system |
| KR20060036261A (en) * | 2004-10-25 | 2006-04-28 | 한국전력공사 | Method for removing polychlorinated biphenyls by catalyst |
| KR20060037225A (en) * | 2005-09-21 | 2006-05-03 | 최춘식 | Transformer insulation oil supply device |
| KR100740919B1 (en) | 2006-07-31 | 2007-07-20 | 한국해양연구원 | Method for reproducting of insulating oil by removing polychlorinated biphenyl and insulating oil using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060036261A (en) * | 2004-10-25 | 2006-04-28 | 한국전력공사 | Method for removing polychlorinated biphenyls by catalyst |
| KR200389360Y1 (en) | 2005-04-04 | 2005-07-14 | 정상철 | Influx transformer filtration system |
| KR20060037225A (en) * | 2005-09-21 | 2006-05-03 | 최춘식 | Transformer insulation oil supply device |
| KR100740919B1 (en) | 2006-07-31 | 2007-07-20 | 한국해양연구원 | Method for reproducting of insulating oil by removing polychlorinated biphenyl and insulating oil using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102417702B1 (en) | 2021-01-06 | 2022-07-07 | (주)유엠로직스 | System and method for optimal processing data calculation of PBCs removal based on explainable AI |
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