JP2001246014A - Method and device for detoxifying pole transformer for distribution - Google Patents

Method and device for detoxifying pole transformer for distribution

Info

Publication number
JP2001246014A
JP2001246014A JP2000059286A JP2000059286A JP2001246014A JP 2001246014 A JP2001246014 A JP 2001246014A JP 2000059286 A JP2000059286 A JP 2000059286A JP 2000059286 A JP2000059286 A JP 2000059286A JP 2001246014 A JP2001246014 A JP 2001246014A
Authority
JP
Japan
Prior art keywords
cleaning
water
oil
washing
case
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
Application number
JP2000059286A
Other languages
Japanese (ja)
Other versions
JP3777941B2 (en
Inventor
Masaaki Ueda
昌明 植田
Yuji Shiki
祐治 志岐
Eiji Katayama
栄治 片山
Original Assignee
Kansai Tech Corp
株式会社関西テック
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kansai Tech Corp, 株式会社関西テック filed Critical Kansai Tech Corp
Priority to JP2000059286A priority Critical patent/JP3777941B2/en
Publication of JP2001246014A publication Critical patent/JP2001246014A/en
Application granted granted Critical
Publication of JP3777941B2 publication Critical patent/JP3777941B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To enable a pole transformer for distribution using insulating oil containing polychlorobiphehyl to be reused as a treated case or a steel material and save space for storing a huge amount of the pole transformers for distribution by cleaning the pole transformer with safe cleaning fluid easy to use in order to effectively and safely collect the insulating oil from the pole transformer and detoxify the pole transformer enough to satisfy legal standard values. SOLUTION: The insulating oil containing polychlorobiphenyl is sucked out and drip-extracted from the pole transformer for distribution by a residual oil extracting means 1. The extracted insulating oil is collected by an oil collecting means 7, while the internal and external surfaces of the pole transformer are cleaned with low hydraulic pressure jet by a primary cleaning means after extracting the insulating oil, dried and sent to a dismantling and separating means 3 to be dismantled and separated into the case and an internal member. After the case is sent to a secondary cleaning means 4 and the inside thereof is cleaned by a high hydraulic pressure jet and dried, the case is furthermore sent to a solvent cleaning means 11 and cleaned by a hydrocarbon solvent so as to be reus able as the treated case or the steel material.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は、環境汚染物質であ
る多塩素化ビフェニル(以下、PCBと称す。)で汚染
された配電用柱上変圧器の無害化処理に関するものであ
り、更に詳しくは、当該変圧器のケースを洗浄し、「廃
掃法施行規則第一条の二第4項」に定める基準を満足す
る処理済みケース又は鉄鋼原料として再利用可能とする
配電用柱上変圧器の無害化処理技術に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detoxification treatment of a power distribution pole transformer contaminated with polychlorinated biphenyl (hereinafter referred to as PCB) which is an environmental pollutant, and more particularly to the invention. Clean the case of the said transformer, and harmless the treated case or the distribution pole transformer which can be reused as a raw material for steel that satisfies the criteria stipulated in Article 1, paragraph 2, paragraph 4, of the Ordinance for Enforcement of the Waste Cleaning Act. The present invention relates to chemical processing technology.
【0002】[0002]
【従来の技術】PCBは、優れた電気絶縁性を有するこ
とから、過去においては配電用柱上変圧器の電気絶縁材
として利用されていた。ところが、その環境及び人体へ
の有害性が明らかになり、現在では製造が禁止されてい
るとともに、PCBを含有する絶縁油を使用した変圧器
は、安全な処理方法が確立するまで、使用者の義務とし
て、その膨大な量を保管することが義務づけられてい
る。
2. Description of the Related Art PCBs have been used in the past as electrical insulating materials for power pole transformers because of their excellent electrical insulation properties. However, its harmfulness to the environment and the human body has been clarified, and its production has been banned at present. Transformers that use insulating oil containing PCBs will not be available to users until a safe disposal method is established. The obligation is to keep a huge amount of that.
【0003】現在、PCB及びPCBを含む廃油の処理
方法として法律上認められている方法としては、燃焼に
よる焼却方法、脱塩素化分解方法及び超臨界水酸化分解
方法などがある。また、PCBを含有する絶縁油を使用
した配電用柱上変圧器からPCBを除去する方法として
は、例えば特開平10−289824号公報に開示され
ているような、変圧器部材からPCBを含む絶縁油を抜
き取ったのち、部材を破砕、分別し、洗浄装置に入れ、
例えばノルマルヘキサンのような炭化水素系溶剤で洗浄
する方法が提案されている。
At present, as a method legally recognized as a method for treating PCB and waste oil containing PCB, there are an incineration method by combustion, a dechlorination decomposition method and a supercritical hydroxylation decomposition method. As a method of removing PCB from a power distribution pole transformer using insulating oil containing PCB, for example, as disclosed in Japanese Patent Application Laid-Open No. 10-289824, insulation including PCB from a transformer member is disclosed. After draining the oil, crush the components, separate them, put them in the washing device,
For example, a method of washing with a hydrocarbon solvent such as normal hexane has been proposed.
【0004】しかし、従来、変圧器部材の洗浄に使用さ
れている炭化水素系溶剤、例えばノルマルヘキサンは、
揮発性が大きく引火爆発性が非常に高く、また、蒸気吸
入により、めまい、手足の感覚麻痺、歩行困難などの多
発性神経炎の症状が起こることから、取扱いに注意を要
する。
However, hydrocarbon solvents conventionally used for cleaning transformer members, for example, normal hexane,
It must be handled with care because it has a high volatility and a very high flammable explosive property, and vapor inhalation causes polyneuritis symptoms such as dizziness, paralysis of limbs and difficulty walking.
【0005】[0005]
【発明が解決しようとする課題】本発明は、上記のよう
なPCBを含有する絶縁油を使用した配電用柱上変圧器
の無害化処理の現状に鑑み、ノルマルヘキサンのように
引火爆発性が高く、また蒸気吸入による神経炎発生のお
それのある溶剤ではなく、安全で取扱いの容易な洗浄液
により前記変圧器からPCBを含有する絶縁油を効率的
かつ安全に回収し、膨大な配電用柱上変圧器の保管に伴
うスペースを低減することを目的として、内部部材を解
体、分別した後の変圧器ケースを法律に定める基準値を
満足する程度に無害化して処理済みケース又は鉄鋼原料
として再利用可能とする技術を提供せんとするものであ
る。
SUMMARY OF THE INVENTION In view of the present situation of the detoxification of pole transformers for power distribution using insulating oil containing PCB as described above, the present invention has an inflammable explosive property such as normal hexane. Efficient and safe recovery of PCB-containing insulating oil from the transformer with a safe and easy-to-handle cleaning solution, not a solvent that is expensive and may cause neuritis due to vapor inhalation. To reduce the space required for storage of transformers, disassemble and separate internal components, detoxify the transformer case to the extent that it satisfies the standard values stipulated by law, and reuse it as a treated case or steel material It is intended to provide the technology that enables it.
【0006】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明に係る配電用柱上変圧器の無害化処理方法
は、当該変圧器から予め絶縁油を抜き取った後のケース
を炭化水素系溶剤で洗浄するにあたり、該炭化水素系溶
剤の使用量を極力低減するとともに、安全性が高く取扱
いが容易な溶剤での洗浄を可能とすべく、溶剤による洗
浄に先立ち水で洗浄することで、絶縁油とともにPCB
を洗浄除去するものである。即ち、本発明は、多塩素化
ビフェニルを含む絶縁油を使用した配電用柱上変圧器か
ら前記絶縁油を吸引又は滴下抜油した後、水で洗浄し、
更に炭化水素系溶剤で洗浄することを特徴とする配電用
柱上変圧器ケースの無害化処理方法である。本発明の無
害化処理方法によれば、事前に洗浄液として水を使用す
ることから、一気に炭化水素系溶剤と混合した絶縁油中
のPCBを分離する場合と比較して、油水分離により洗
浄水からPCBを含む油分を簡単に回収することがで
き、回収装置の容量・構造も簡略化され、油水分離後の
洗浄水中に含まれるPCB含有率を容易に低減すること
ができるという利点がある。
In order to achieve the above object, a method for detoxifying a power pole transformer for power distribution according to the present invention is characterized in that a case after insulating oil is previously extracted from the transformer is carbonized. When cleaning with a hydrogen-based solvent, minimize the amount of the hydrocarbon-based solvent used, and wash with water prior to cleaning with the solvent to enable cleaning with a safe and easy-to-handle solvent. And PCB with insulating oil
Is to be removed by washing. That is, the present invention suctions or instills the insulating oil from a power distribution pole transformer using insulating oil containing polychlorinated biphenyl, and then is washed with water.
Further, there is provided a method for detoxifying a pole-mounted transformer case for power distribution, characterized by washing with a hydrocarbon solvent. According to the detoxification treatment method of the present invention, since water is used as a cleaning liquid in advance, compared to a case where PCBs in insulating oil mixed with a hydrocarbon-based solvent are separated at a stretch, oil-water separation from cleaning water There is an advantage that oil containing PCB can be easily recovered, the capacity and structure of the recovery device can be simplified, and the content of PCB contained in the wash water after oil-water separation can be easily reduced.
【0007】また、本発明方法においては、炭化水素系
溶剤による洗浄に先立ち、水で変圧器を洗浄するだけで
も、変圧器ケースの表面に付着するPCBの法定基準を
満足することができることから、従来使用されていたノ
ルマルヘキサンよりも洗浄能力は若干劣るが、引火点、
初留点が高く、安全性及び取扱いの有利な溶剤を変圧器
の洗浄液として選定することが可能となる。このような
溶剤としては、例えば、ナフテン系炭化水素、パラフィ
ン系炭化水素などを用いることができ、それらの中で
も、沸点、引火点の低いものが安全性及び取扱い性の点
から好ましい。
Further, in the method of the present invention, it is possible to satisfy the statutory standard of PCB adhering to the surface of the transformer case only by washing the transformer with water prior to washing with the hydrocarbon solvent. Although the washing ability is slightly inferior to that of normal hexane used conventionally, the flash point,
A solvent having a high initial boiling point and advantageous in safety and handling can be selected as a cleaning liquid for the transformer. As such a solvent, for example, naphthenic hydrocarbons, paraffinic hydrocarbons and the like can be used, and among them, those having a low boiling point and a low flash point are preferable from the viewpoint of safety and handleability.
【0008】また、本発明の無害化処理方法において
は、抜油した変圧器を水で一次洗浄したうえで、ケース
と内部部材とに解体、分別して、ケースを水で再度、洗
浄(二次洗浄)し、その後に更に炭化水素系溶剤で洗浄
することが好ましい。このように、変圧器を分解、解体
する前に、該変圧器の内外面を水で洗浄することによ
り、人的作業環境の保全を確保し、絶縁油及びPCBの
拡散防止を図ることができる。
[0008] In the detoxification method of the present invention, the drained transformer is primarily washed with water, disassembled and separated into a case and internal members, and the case is washed again with water (secondary washing). After that, it is preferable to further wash with a hydrocarbon solvent. As described above, by cleaning the inner and outer surfaces of the transformer with water before disassembling and disassembling the transformer, it is possible to secure the preservation of the human working environment and prevent the diffusion of the insulating oil and PCB. .
【0009】上記のような水による洗浄の結果、変圧器
ケースの油分付着率を、例えば1mg/100cm2
下まで低減することが可能となる。従って、通常、配電
用柱上変圧器のPCB含有絶縁油中のPCB濃度は概ね
100ppm以下であることから、拭き取り試験の法定
基準値である0.1μg/100cm2以下の条件を満
足することが可能となる。しかし、「廃掃法施行規則第
一条の二第4項」に定める基準を満足するには、前記の
ような炭化水素系溶剤で洗浄することが望ましい。
As a result of washing with water as described above, the oil content of the transformer case can be reduced to, for example, 1 mg / 100 cm 2 or less. Therefore, since the PCB concentration in the PCB-containing insulating oil of the power distribution pole transformer is generally not more than 100 ppm, it is necessary to satisfy the condition of 0.1 μg / 100 cm 2 or less, which is the legal standard value of the wiping test. It becomes possible. However, in order to satisfy the criteria set forth in the Article 1-2, Paragraph 4 of the Regulations for Enforcement of the Waste Cleaning Law, it is desirable to wash with the above-mentioned hydrocarbon solvent.
【0010】また、上記本発明の無害化処理方法におい
ては、前記水による洗浄を、例えば噴射角30度〜60
度のマルチ配置ウォータージェット法により行うことが
好ましく、更に前記一次洗浄を低水圧ジェット洗浄で行
い、二次洗浄を高水圧ジェット洗浄で行うことが好まし
い。本発明における前記ウォータージェット法による洗
浄とは、洗浄対象物である変圧器のケースや内部部材に
対してノズルの先端から、例えば噴射角30度〜60度
で噴流状に洗浄水を噴射して洗浄することをいう。この
場合、前記一次洗浄を二次元形状のノズルにより行い、
二次洗浄はケース内部を三次元形状のノズルにより、ま
たケース外部は二次元形状のノズルにより行うことが好
ましい。即ち、水による一次洗浄ノズルは二次元形状で
直射、放射状に拡散させる機能を有するものを用いるこ
とが好ましく、また、内部部材を解体、分別した後の二
次洗浄に用いるケース内面洗浄用ノズルは、高圧・高速
にして、三次元形状で360度全方向に拡散する機能を
有するノズルにより行い、ケース外面洗浄用ノズルは前
記一次洗浄ノズルと同様の二次元形状で直射、放射状に
拡散させる機能を有するものを用いることが好ましい。
更に、前記二次洗浄におけるケース内面洗浄用の三次元
ノズルは移動ノズルとすることが好ましい。
In the detoxification method of the present invention, the washing with water is performed, for example, at an injection angle of 30 ° to 60 °.
It is preferable to perform the first cleaning by low-pressure jet cleaning and the second cleaning by high-pressure jet cleaning. The washing by the water jet method in the present invention means that the washing water is jetted from a tip of a nozzle to a case or an internal member of a transformer which is an object to be washed, for example, at a jet angle of 30 to 60 degrees in a jet flow. Washing. In this case, the primary cleaning is performed by a two-dimensional nozzle,
The secondary cleaning is preferably performed by a three-dimensional nozzle inside the case and a two-dimensional nozzle outside the case. That is, the primary cleaning nozzle with water is preferably used in a two-dimensional shape, having a function of directly radiating and radially diffusing, and also disassembling the internal member, the nozzle for cleaning the inner surface of the case used for the secondary cleaning after separation is preferable. A high-pressure, high-speed nozzle with a function of diffusing 360 degrees in all directions in a three-dimensional shape. The nozzle for cleaning the outer surface of the case has a function of direct and radial diffusion in the same two-dimensional shape as the primary cleaning nozzle. It is preferable to use those having.
Further, the three-dimensional nozzle for cleaning the inner surface of the case in the secondary cleaning is preferably a moving nozzle.
【0011】更に、水の温度を上昇させて(温水で)洗
浄を行うと、ある程度のPCB除去率の向上が期待でき
る。本発明でいう前記温水とは、25℃以上の水をい
う。しかし、洗浄水の温度によって洗浄時間には大差は
なく、洗浄時間はむしろ洗浄水の圧力やノズル形状に左
右される。従って、PCBの除去率の更なる向上を図る
場合には、3次洗浄、4次洗浄といった具合に洗浄回数
を増やす方が、洗浄効果の向上が期待できる。
Further, when the temperature of the water is raised (with hot water) for cleaning, a certain improvement in the PCB removal rate can be expected. The warm water in the present invention refers to water at 25 ° C. or higher. However, there is no great difference in the cleaning time depending on the temperature of the cleaning water, and the cleaning time rather depends on the pressure of the cleaning water and the nozzle shape. Therefore, in order to further improve the removal rate of the PCB, it is expected to improve the cleaning effect by increasing the number of times of cleaning such as third cleaning and fourth cleaning.
【0012】尚、前記変圧器から解体、分別した内部部
材は、専用保管容器に収納して保管する。この専用容器
に収納した内部部材は、溶融や真空除去など、短時間で
多量処理できる方法や装置によりPCBを除去して無害
化されることが望ましい。
The internal member disassembled and separated from the transformer is stored in a dedicated storage container. It is desirable that the internal members housed in the dedicated container be detoxified by removing the PCB by a method or apparatus capable of processing a large amount in a short time, such as melting or vacuum removal.
【0013】また、前記柱上変圧器から抜き取った絶縁
油は、例えば特許第2638483号方法により、アル
カリ金属ターシャリーブトキシドを反応剤として用いて
加熱撹拌することで無害化することができる。この無害
化後の絶縁油は、燃料油や絶縁油として再利用すること
ができる。
The insulating oil extracted from the pole transformer can be detoxified by heating and stirring using an alkali metal tert-butoxide as a reactant, for example, according to the method of Japanese Patent No. 2638483. The detoxified insulating oil can be reused as fuel oil or insulating oil.
【0014】更に、前記洗浄後の水は、油水分離器によ
り油分を分離した後、洗浄水として循環利用することが
できる。更に、油水分離器に加えて活性炭による吸着分
離を併用しての浄化処理も効果的である。このような油
水の比重差分離と吸着分離により、循環水(洗浄水)の
油分濃度を、例えば15ppm以下に保つことができ
る。一方、前記分離された油分は、柱上変圧器から抜き
取った絶縁油と同様に前記アルカリ金属ターシャリーブ
トキシドを反応剤として加熱撹拌する無害化方法により
処理することで、燃料油や絶縁油として再利用に供する
ことができる。
Further, the water after the washing can be circulated and used as washing water after the oil component is separated by an oil-water separator. Further, a purification treatment using adsorption separation with activated carbon in addition to the oil-water separator is also effective. By such a specific gravity difference separation and adsorption separation of the oil water, the oil concentration of the circulating water (wash water) can be maintained at, for example, 15 ppm or less. On the other hand, the separated oil is treated by the detoxification method of heating and stirring using the alkali metal tertiary butoxide as a reactant in the same manner as the insulating oil extracted from the pole transformer, thereby re-converting it as fuel oil or insulating oil. Can be used for use.
【0015】また、前記洗浄に用いる炭化水素系溶剤も
循環使用できるが、使用によりPCBを含有する絶縁油
が蓄積された炭化水素系溶剤は、前記回収された絶縁油
と同様に、アルカリ金属ターシャリーブトキシドを反応
剤とする方法などで無害化することができる。即ち、本
発明方法においては、水洗浄後、わずかに付着している
であろう油分を更に前記炭化水素系溶剤により洗浄除去
するのであるが、何百台、何千台と変圧器を洗浄してい
るうちに、溶剤が絶縁油及びそれに含まれるPCBに汚
染されてゆく。この汚染された溶剤を回収し、前記アル
カリ金属ターシャリーブトキシドを反応剤として加熱撹
拌することで無害化処理するのである。
The hydrocarbon solvent used for the washing can be circulated and used. However, the hydrocarbon solvent in which the insulating oil containing PCB is accumulated by use is used in the same manner as the recovered insulating oil. Detoxification can be achieved by a method using leavexoxide as a reactant. That is, in the method of the present invention, after washing with water, the oil which may be slightly adhered is further washed and removed with the above-mentioned hydrocarbon solvent. In the meantime, the solvent becomes contaminated by the insulating oil and the PCB contained therein. The contaminated solvent is recovered and detoxified by heating and stirring using the alkali metal tert-butoxide as a reactant.
【0016】また、本発明に係る配電用柱上変圧器の無
害化処理装置は、多塩素化芳香族化合物を含む絶縁油を
使用した柱上変圧器から吸引又は滴下により前記絶縁油
を抜油する残油抜取り手段と、前記抜油した変圧器を水
で洗浄する一次洗浄手段と、前記一次洗浄した変圧器を
ケースと内部部材とに解体、分別する解体・分別手段
と、前記内部部材を解体、分別した後のケースを水で洗
浄する二次洗浄手段と、前記二次洗浄後のケースを炭化
水素系溶剤で洗浄する溶剤洗浄手段とを備えることを特
徴とするものである。
Further, the detoxification apparatus for a pole transformer for power distribution according to the present invention drains the insulating oil by suction or dropping from a pole transformer using an insulating oil containing a polychlorinated aromatic compound. Residual oil removing means, primary cleaning means for cleaning the drained transformer with water, disassembling the primary washed transformer into a case and an internal member, dismantling / separating means for separating, and disassembling the internal member, It is characterized by comprising secondary washing means for washing the separated case with water, and solvent washing means for washing the case after the secondary washing with a hydrocarbon-based solvent.
【0017】更に、上記装置において、一次洗浄手段、
二次洗浄手段、溶剤洗浄手段、更には変圧器の解体、分
別を行う解体・分別手段は、換気処理手段又は及び排気
処理手段を設けた室内に設置することが好ましい。更に
この場合に、前記換気及び排気系に冷却手段、温度低下
手段、気液分離手段及び活性炭吸着手段を備え、換気及
び排気中に残存するPCBを長期間安定して活性炭吸着
することにより、大気中にPCBを全く放出しないよう
にすることが好ましい。
Further, in the above apparatus, a primary cleaning means,
The secondary washing means, the solvent washing means, and the disassembly / separation means for disassembling and separating the transformer are preferably installed in a room provided with a ventilation treatment means or an exhaust treatment means. Further, in this case, the ventilation and exhaust system is provided with a cooling means, a temperature lowering means, a gas-liquid separation means and an activated carbon adsorbing means. It is preferred that no PCB be released into it.
【0018】[0018]
【発明の実施の形態】本発明による配電用柱上変圧器の
無害化処理方法を、図1に示す無害化処理装置の一実施
形態のブロック図に基づいて詳細に説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for detoxifying a pole transformer for power distribution according to the present invention will be described in detail with reference to the block diagram of one embodiment of a detoxification apparatus shown in FIG.
【0019】上記したように本発明は、配電用柱上変圧
器を処理対象物として、水洗浄と溶剤洗浄との併用方式
により、当該変圧器よりPCBを含有した絶縁油を効率
的かつ安全に回収し、PCBを絶縁油とともに洗浄除去
することにより、変圧器ケースを処理済みケースや鉄鋼
原料として有効利用可能とするものである。また、PC
Bを含む絶縁油を抜き取った配電用柱上変圧器の膨大な
量を保管するスペースは、変圧器の容量、形状が一定で
なく、効率的保管手段を確保するには、人的及び時間的
手間が必要であり、経済的負担も大きく、保管スペース
も増大する。これに対し、本発明では、上記のように変
圧器ケースから内部部材を解体、分別してケースを無害
化することで、前記分別された変圧器の内部部材を、一
定形状の専用容器に安全に保管することができるように
なり、PCBを含む絶縁油を使用した配電用柱上変圧器
の保管スペースの削減を可能とする。
As described above, according to the present invention, the power distribution pole transformer is treated as an object to be treated, and the insulating oil containing PCB is efficiently and safely removed from the transformer by the combined use of the water washing and the solvent washing. By recovering and washing and removing the PCB together with the insulating oil, the transformer case can be effectively used as a treated case or a steel raw material. Also, PC
Space for storing a huge amount of transformers on distribution poles from which insulating oil containing B has been extracted must be human and time-consuming to ensure that the transformers are not of constant capacity and shape, and that efficient storage means can be secured. This requires time, increases the economic burden, and increases the storage space. On the other hand, in the present invention, by disassembling and separating the internal member from the transformer case as described above to render the case harmless, the separated internal member of the transformer can be safely placed in a dedicated container having a predetermined shape. The storage space can be stored, and the storage space for the power distribution pole transformer using insulating oil including PCB can be reduced.
【0020】本発明による変圧器の無害化処理は、図1
に示すように、残油抜取り手段1により配電用柱上変圧
器からPCBを含有する絶縁油を吸引又は滴下抜油し、
抜き取ったPCB含有絶縁油は、油回収手段7により回
収する。次に、前記抜油後の変圧器は、一次洗浄手段2
により、内外面を、例えば温度40℃、圧力0.8MP
a程度の低水圧ジェットで洗浄した後、乾燥したうえ
で、次工程の解体・分別手段3に送られる。ここで変圧
器はケースと内部部材とに解体、分別され、内部部材は
専用保管容器などに収納し、安全に保管する。一方、変
圧器ケースは、二次洗浄手段4に送られて、ケース内部
を、例えば温度40℃、圧力8MPa程度の高水圧ジェ
ットで洗浄し、乾燥した後、更に溶剤洗浄手段11へ送
られて炭化水素系溶剤により洗浄し、処理済みケース又
は鉄鋼原料として再利用可能となる。
The detoxification process of the transformer according to the present invention is shown in FIG.
As shown in the figure, the residual oil extracting means 1 sucks or drip the insulating oil containing PCB from the pole transformer for power distribution,
The extracted PCB-containing insulating oil is collected by the oil collecting means 7. Next, the transformer after the oil removal is connected to the primary cleaning means 2.
The inner and outer surfaces are, for example, at a temperature of 40 ° C. and a pressure of 0.8 MPa
After being washed with a low-pressure jet of about a, dried and sent to the disassembling / sorting means 3 in the next step. Here, the transformer is disassembled and separated into a case and internal members, and the internal members are stored in a dedicated storage container or the like and stored safely. On the other hand, the transformer case is sent to the secondary washing means 4, where the inside of the case is washed with a high-pressure jet at a temperature of, for example, 40 ° C. and a pressure of about 8 MPa, dried, and further sent to the solvent washing means 11. It is washed with a hydrocarbon solvent and can be reused as a treated case or as a steel raw material.
【0021】前記残油抜取り手段1による配電用柱上変
圧器からの残油の抜き取りは、当該変圧器からPCB含
有絶縁油をできる限り吸引又は滴下抜油し、変圧器内の
大半の絶縁油を回収する。また、鉄芯、巻線コイルなど
の変圧器内の部材に含有する絶縁油は、吸引又は滴下抜
油後、概ね10時間以上静置した後、当該変圧器底部の
残油を再度吸引又は滴下抜油することが望ましい。
The residual oil is extracted from the distribution pole transformer by the residual oil extracting means 1 by sucking or dropping the PCB-containing insulating oil as much as possible from the transformer, and removing most of the insulating oil in the transformer. to recover. Insulation oil contained in members in the transformer, such as iron cores and wound coils, is suctioned or dripped and then left for approximately 10 hours or more, and then the residual oil at the bottom of the transformer is suctioned or dripped again. It is desirable to do.
【0022】上記のように抜油された変圧器は、ケース
と内部部材とに解体、分別されるのであるが、この変圧
器の解体、分別は、人的作業に頼らざるを得ない。そこ
で、本発明では、変圧器の解体、分別作業に伴うPCB
含有絶縁油の人体への付着及び環境への拡散防止のた
め、変圧器の解体、分別に先立って、一次洗浄手段2に
より、当該変圧器の内外面を洗浄し、変圧器に残存する
PCB含有絶縁油をできるだけ除去する。この一次洗
浄、例えば、温度40℃、圧力0.8MPa程度で1分
間程度の洗浄により、変圧器の油分付着率を、例えば3
5mg/100cm 2程度にまで低減することができ
る。
The transformer drained as described above is
And the internal components are disassembled and separated.
Dismantling and sorting of vessels have to rely on human work. There
Therefore, in the present invention, the PCB associated with disassembly and separation of the transformer
To prevent insulation oil from adhering to the human body and spreading to the environment.
Before dismantling and sorting the transformer, the primary cleaning means 2
Cleans the inner and outer surfaces of the transformer and remains on the transformer
PCB-containing insulating oil is removed as much as possible. This primary wash
Purification, for example, at a temperature of 40 ° C. and a pressure of about 0.8 MPa for 1 minute
By washing for a short time, the oil adhesion rate of the transformer is reduced to, for example, 3
5mg / 100cm TwoCan be reduced to the extent
You.
【0023】前記のように一次洗浄により内外面を洗浄
した変圧器は、次に解体・分別手段3に送られて、ケー
スと内部部材とに解体、分別され、内部部材は専用保管
容器などに収納する。この専用保管容器に収納した内部
部材は、短時間で多量処理でき、また、大気中にPCB
が放出されることがなく安全に処理が可能な溶融法、真
空除去法などの処理技術により処理されることが望まし
い。
The transformer, whose inner and outer surfaces have been cleaned by the primary cleaning as described above, is then sent to the disassembling / separating means 3, where it is disassembled and separated into a case and an internal member. To store. The internal components housed in this dedicated storage container can be processed in large quantities in a short time,
Is desirably treated by a processing technique such as a melting method and a vacuum removal method that can safely process without releasing methane.
【0024】前記変圧器の解体、分別を行う解体・分別
手段3は、人的保全を確保するため、空気の換気を十分
に確保しうる室内に設置し、室内に発生する滴状油分
は、解体・分別手段3に併設した排気処理手段9の局所
排気フードなどに設けたグリスフィルターなどにより除
去し、活性炭によりPCBを吸着除去した後、排気する
ようにすることが好ましい。
The disassembling / separating means 3 for disassembling and separating the transformer is installed in a room where air ventilation can be sufficiently ensured in order to ensure human security. It is preferable that the gas is removed by a grease filter or the like provided in a local exhaust hood or the like of the exhaust processing means 9 provided in conjunction with the disassembling / separating means 3, and the PCB is adsorbed and removed by activated carbon and then exhausted.
【0025】一方、解体分別後の変圧器のケースは、二
次洗浄手段4に送られ、その表面に付着するPCB含有
絶縁油を除去するため、再度、水により洗浄を行う。こ
の水による二次洗浄は、変圧器ケースの内面を、例えば
温度40℃、圧力8MPa程度の高水圧ジェットで2分
間程度洗浄することにより、油分付着率を1mg/10
0cm2以下程度にまで低減することができる。配電用
柱上変圧器のPCB含有絶縁油のPCB濃度は概ね10
0ppm以下であることから、この二次水洗浄により、
拭き取り試験の法定基準値である0.1μg/100c
2以下の条件を満足することができる。
On the other hand, the transformer case after disassembly and separation is sent to the secondary washing means 4 and washed again with water to remove the PCB-containing insulating oil adhering to its surface. The secondary washing with water is performed by washing the inner surface of the transformer case with, for example, a high water pressure jet at a temperature of 40 ° C. and a pressure of about 8 MPa for about 2 minutes so that the oil adhesion rate is 1 mg / 10 g.
It can be reduced to about 0 cm 2 or less. PCB concentration of insulating oil containing PCB of distribution pole transformer is about 10
Since it is 0 ppm or less, by this secondary water washing,
0.1 μg / 100c which is the legal standard value of the wiping test
m 2 can satisfy the following conditions.
【0026】前記一次洗浄手段2及び二次洗浄手段4
は、温水供給部5に接続されており、一次洗浄手段2及
び二次洗浄手段4で使用される洗浄水は、この温水供給
手段5により供給され、該温水供給部5から供給される
水(温水)により変圧器ケース及び内部部材の洗浄が行
われる。一次水洗浄及び二次洗浄に使用された洗浄後の
水(温水)は、油水分離手段6により油と水とに分離さ
れ、水は例えば活性炭で浄化するなどして油分濃度15
ppm以下にして温水供給手段5へ戻し、一次水洗浄及
び二次水洗浄の洗浄水として再利用する。一方、油は、
油水分離手段6により、例えば比重差及び吸着により水
から分離され、油回収手段7に回収される。
The primary cleaning means 2 and the secondary cleaning means 4
Is connected to the hot water supply unit 5, and the washing water used in the primary washing unit 2 and the secondary washing unit 4 is supplied by the hot water supply unit 5 and supplied from the hot water supply unit 5 ( The transformer case and the internal members are cleaned by the hot water. The washed water (hot water) used for the primary water washing and the secondary washing is separated into oil and water by the oil / water separating means 6, and the water is purified by, for example, activated carbon to obtain an oil concentration of 15%.
It is returned to the hot water supply means 5 with the concentration being less than or equal to ppm, and is reused as washing water for primary water washing and secondary water washing. On the other hand, oil
The oil-water separation means 6 separates the water from the water by, for example, a difference in specific gravity and adsorption, and is recovered by the oil recovery means 7.
【0027】上記のような一次水洗浄及び二次水洗浄を
実施した場合における、変圧器ケースの油分付着率及び
PCB付着率と、洗浄に使用した水、更にそれを油水分
離した後の水の油分濃度とPCB含有率の一例を下記表
1に示す。
In the case where the primary water washing and the secondary water washing were performed as described above, the oil adhesion ratio and the PCB adhesion ratio of the transformer case, the water used for the cleaning, and the water after the oil-water separation. An example of the oil concentration and the PCB content is shown in Table 1 below.
【0028】[0028]
【表1】 [Table 1]
【0029】また、前記一次洗浄手段2及び二次洗浄手
段4は、気密性構造の室内に設置され、洗浄と乾燥機能
とを有するとともに、それぞれ換気処理手段8、10を
備えており、該換気処理手段8、9により各洗浄室内を
温度調整して空気中のPCBを活性炭などにより長期間
安定に吸着浄化させ、空気を再循環する機能を有するこ
とが好ましい。更に、活性炭の寿命や吸着性向上のた
め、空気中に飛散するミストを凝縮させたのち、再熱し
て温度調整する装置を有することがより好ましい。
The primary cleaning means 2 and the secondary cleaning means 4 are installed in a room having an airtight structure, have a cleaning and drying function, and have ventilation processing means 8 and 10, respectively. It is preferable to have a function of adjusting the temperature of each cleaning chamber by the processing means 8 and 9 to stably adsorb and purify PCB in the air by activated carbon or the like for a long period of time, and recirculate the air. Further, in order to improve the life and adsorption of activated carbon, it is more preferable to have a device for condensing mist scattered in the air and then reheating to adjust the temperature.
【0030】また、前記吸引又は滴下抜油により変圧器
から抜き取ったPCB含有絶縁油及び前記一次水洗浄及
び二次水洗浄の洗浄水から油水分離した油分は、油回収
手段7に回収された後、例えば、特許第2638483
号のターシャリーブトキシドを反応剤として加熱撹拌す
ることでPCBを分解する方法などにより無害化する。
前記吸引又は滴下抜油により変圧器から抜き取った絶縁
油及び前記一次水洗浄及び二次水洗浄の洗浄水から油水
分離した油分の水分率は200ppm以下であり、これ
を前記ターシャリーブトキシドにより処理した結果の油
中のPCB濃度は基準値である0.5ppm以下を満足
することから、燃料油や絶縁油として再利用することが
できる。
Further, the PCB-containing insulating oil extracted from the transformer by the suction or dropping oil removal and the oil separated from the washing water of the primary water washing and the secondary water washing are collected by the oil collecting means 7. For example, Japanese Patent No. 2638483
Detoxification is carried out by decomposing PCB by heating and stirring with tertiary butoxide of No. 1 as a reactant.
The water content of the insulating oil extracted from the transformer by the suction or dropping oil and the oil separated from the washing water of the primary water washing and the secondary water washing is 200 ppm or less, and the result of treating this with the tertiary butoxide. Since the concentration of PCB in the oil satisfies the reference value of 0.5 ppm or less, it can be reused as fuel oil or insulating oil.
【0031】次に、前記二次洗浄手段4にて洗浄された
変圧器ケースは、溶剤洗浄手段11に送られて炭化水素
系溶剤にて洗浄される。溶剤洗浄手段11は溶剤供給手
段12に接続されており、該溶剤供給手段12から供給
される炭化水素系溶剤を循環使用して変圧器ケースを洗
浄し、乾燥して処理済みケース又は鉄鋼材料として再利
用可能とする。前記循環使用される溶剤中には、絶縁油
及びPCBが蓄積、濃縮されてゆくので、例えば溶剤中
のPCB濃度が0.4ppm以上になったところで、回
収容器に回収し、後述する無害化処理に供される。尚、
50kVA相当の変圧器ケースを100台処理した場合
の洗浄溶剤1600LのPCB濃度の例を下記表2に示
す。
Next, the transformer case washed by the secondary washing means 4 is sent to a solvent washing means 11 and washed with a hydrocarbon solvent. The solvent washing means 11 is connected to the solvent supply means 12, and circulates and uses the hydrocarbon solvent supplied from the solvent supply means 12 to wash the transformer case and dry it to obtain a treated case or a steel material. Reusable. Insulating oil and PCB accumulate and concentrate in the circulating solvent. For example, when the PCB concentration in the solvent becomes 0.4 ppm or more, the solvent is collected in a collection container and detoxification treatment described later is performed. To be served. still,
Table 2 shows an example of the PCB concentration of 1600 L of the cleaning solvent when 100 transformer cases corresponding to 50 kVA are processed.
【0032】[0032]
【表2】 [Table 2]
【0033】表2から明らかなように、上記の例では、
一次水洗浄及び二次水洗浄を行わずに溶剤洗浄で処理し
た場合、およそ100台を処理した時点で洗浄溶剤を回
収することになるが、一次水洗浄及び二次水洗浄を行っ
た後に溶剤洗浄を行う本発明方法では、溶剤中のPCB
濃度は溶剤洗浄単独の場合のおよそ300分の1程度に
までしか蓄積されないことから、溶剤の回収頻度を大幅
に低減することができる。
As is apparent from Table 2, in the above example,
If solvent cleaning is performed without performing primary water cleaning and secondary water cleaning, the cleaning solvent will be recovered when about 100 units have been processed, but after performing primary water cleaning and secondary water cleaning, the solvent will be recovered. In the method of the present invention for cleaning, PCB in a solvent is used.
Since the concentration is accumulated only to about 1/300 of that in the case of solvent washing alone, the frequency of solvent recovery can be greatly reduced.
【0034】絶縁油及びPCBが蓄積、濃縮された溶剤
は、溶剤処理手段14へ送られて、特許第263848
3号のターシャリーブトキシドを反応剤として加熱撹拌
することでPCBを分解して無害化する方法などによ
り、該溶剤中のPCBを分解して無害化処理する。
The solvent in which the insulating oil and PCB are accumulated and concentrated is sent to the solvent processing means 14 and is disclosed in Japanese Patent No. 263848.
The PCB in the solvent is decomposed and detoxified by, for example, a method of decomposing and detoxifying PCB by heating and stirring with tertiary butoxide of No. 3 as a reactant.
【0035】溶剤洗浄手段11は気密性構造の室内に設
置され、この溶剤洗浄室には排気処理手段13を設け、
室内の空気が引火・爆発範囲下限値以上に上昇しないよ
うに外気による希釈換気のうえ、滴状溶剤分は排気処理
手段13に設けたグリスフィルターなどにより除去し、
更にミスト凝縮装置により溶剤を凝縮回収し、活性炭で
PCBを吸着除去したうえで排気することが好ましい。
The solvent cleaning means 11 is installed in a room having an airtight structure, and the solvent cleaning chamber is provided with an exhaust treatment means 13.
After diluting and ventilating with the outside air so that the indoor air does not rise above the lower limit of the ignition / explosion range, the drop solvent is removed by a grease filter or the like provided in the exhaust treatment means 13,
Further, it is preferable that the solvent is condensed and recovered by a mist condensing device, and PCB is adsorbed and removed by activated carbon, and then exhausted.
【0036】[0036]
【実施例】図2に示すものは、本発明に係る配電用柱上
変圧器の無害化方法を実施するための処理設備の一実施
例のブロック図である。この無害化処理設備は、残油抜
取り手段1を備えた残油抜取り室、一次洗浄手段2を備
えた一次温水洗浄・乾燥室、解体・分別手段3を備えた
解体室、二次洗浄手段4を備えた二次温水洗浄・乾燥室
及び溶剤洗浄手段11を備えた溶剤洗浄・乾燥室が順次
連設されており、処理対象である変圧器Aが搬送設備1
6によって前記残油抜取り室から溶剤洗浄・乾燥室へと
順次搬送される間に、変圧器AからPCB含有絶縁油が
洗浄、除去されて処理済みケースA’として搬出される
ように構成されている。
FIG. 2 is a block diagram showing an embodiment of a processing facility for carrying out a method of detoxifying a pole transformer for power distribution according to the present invention. This detoxification treatment equipment includes a residual oil extracting chamber provided with residual oil extracting means 1, a primary warm water washing / drying chamber equipped with primary cleaning means 2, a dismantling chamber equipped with dismantling / sorting means 3, and a secondary cleaning means 4 A secondary hot water washing / drying chamber provided with a solvent washing / drying chamber provided with a solvent washing means 11 is successively provided.
6, the PCB-containing insulating oil is washed and removed from the transformer A and transported out as a treated case A 'while being sequentially transferred from the residual oil extracting chamber to the solvent washing / drying chamber. I have.
【0037】前記残油抜取り室の残油抜取り手段1は、
残油ろ過器17を介して油回収手段7の油受けタンク1
8に接続されており、変圧器Aから抜き取ったPCB含
有絶縁油をポンプ19により油受けタンク18へ回収す
る。この時、残油ろ過器17により、油受けタンク18
へ送られるPCB含有絶縁油から異物を除去する。前記
油受けタンク18は、絶縁油無害化装置20に接続され
ていて、油受けタンク18からポンプ21により絶縁油
無害化装置20に送られたPCB含有絶縁油は、ターシ
ャリーブトキシドを反応剤として加熱撹拌することによ
りPCBを分解して無害化する方法などによって無害化
され、燃料油や絶縁油として再利用可能とされる。
The residual oil extracting means 1 of the residual oil extracting chamber includes:
Oil receiving tank 1 of oil collecting means 7 through residual oil filter 17
8, and the PCB-containing insulating oil extracted from the transformer A is collected by the pump 19 into the oil receiving tank 18. At this time, the residual oil filter 17 causes the oil receiving tank 18
Foreign matter is removed from the PCB-containing insulating oil sent to the PCB. The oil receiving tank 18 is connected to an insulating oil detoxifying apparatus 20, and the PCB-containing insulating oil sent from the oil receiving tank 18 to the insulating oil detoxifying apparatus 20 by a pump 21 uses tertiary butoxide as a reactant. The PCB is detoxified by a method of decomposing and detoxifying PCB by heating and stirring, and can be reused as fuel oil or insulating oil.
【0038】次に、水洗浄に係る装置構成は、一次洗浄
手段2、二次洗浄手段4、温水供給手段5及び油水分離
手段6からなっており、系外及び大気中にPCBを放出
することなく、洗浄水を循環使用するとともに、油水分
離器23により循環する洗浄水からPCB含有絶縁油を
回収し、前記油回収手段7を経由して、変圧器Aから抜
き取ったPCB含有絶縁油とともに無害化装置20によ
り無害化処理するように構成されている。
Next, the apparatus configuration related to the water washing is composed of a primary washing means 2, a secondary washing means 4, a hot water supply means 5 and an oil / water separation means 6, and discharges PCB outside the system and into the atmosphere. In addition, the washing water is circulated and used, and the PCB-containing insulating oil is recovered from the washing water circulated by the oil-water separator 23, and is harmless together with the PCB-containing insulating oil extracted from the transformer A via the oil recovery means 7. The detoxifying device 20 is configured to perform detoxification processing.
【0039】前記温水供給手段5は、一次洗浄手段2及
び二次洗浄手段4で使用された後の洗浄水を回収する洗
浄水温水タンク(A)24と一次洗浄手段2及び二次洗
浄手段4へ供給する温水を貯留する洗浄水温水タンク
(B)25との2つのタンクを備えており、前記洗浄水
温水タンク(A)25には洗浄水を所定の温度に加熱す
るヒーター26が設けられている。前記洗浄水温水タン
ク(B)25は、二次洗浄手段4及び一次洗浄手段2に
接続されており、ここからポンプ27〜29により二次
洗浄手段4の洗浄装置30及び一次洗浄手段2の洗浄装
置31へ洗浄水が供給される。前記二次洗浄手段の洗浄
装置30及び一次洗浄手段2の洗浄装置31にて使用さ
れた後の洗浄水は、ポンプ32、33により油水分離手
段6へ送られる。この油水分離手段6へ送られた洗浄水
は、スラッジ回収フィルター22によりスラッジを除去
された後、油水受けタンク34に送られ、更にポンプ3
5により油水分離器23に送られて、ここで洗浄水中の
油分が分離され、分離されたPCBを含有する油分は油
回収手段7に送られて、変圧器Aから抜き取ったPCB
含有絶縁油とともに無害化処理に供される。一方、油水
分離器23により油分が除去された洗浄水は、分離水受
けタンク36に回収され、ここからポンプ37により、
活性炭塔38を通過させて循環水中にごくわずかに残存
するPCB含有絶縁油分を吸着除去して油分濃度がさら
に低減された後、洗浄水温水タンク(A)24へ送ら
れ、ヒーター26により所定の温度に調整された後、再
び洗浄温水タンク(B)25へ送られて、洗浄水として
循環使用される。
The hot water supply means 5 includes a cleaning water hot water tank (A) 24 for collecting the cleaning water used in the primary cleaning means 2 and the secondary cleaning means 4, and the primary cleaning means 2 and the secondary cleaning means 4. And a washing water tank (B) 25 for storing hot water to be supplied to the washing water tank 25. The washing water tank (A) 25 is provided with a heater 26 for heating the washing water to a predetermined temperature. ing. The washing hot water tank (B) 25 is connected to the secondary washing means 4 and the primary washing means 2, from which the pumps 27 to 29 are used to wash the washing device 30 and the primary washing means 2 of the secondary washing means 4. Cleaning water is supplied to the device 31. The cleaning water used in the cleaning device 30 of the secondary cleaning unit and the cleaning device 31 of the primary cleaning unit 2 is sent to the oil-water separation unit 6 by pumps 32 and 33. The washing water sent to the oil / water separating means 6 is sent to an oil / water receiving tank 34 after sludge is removed by the sludge collecting filter 22, and is further sent to the pump 3
5 to the oil / water separator 23, where the oil in the wash water is separated, and the separated oil containing PCB is sent to the oil recovery means 7 to remove the PCB extracted from the transformer A.
Detoxification treatment is provided together with the contained insulating oil. On the other hand, the washing water from which the oil component has been removed by the oil-water separator 23 is collected in a separated water receiving tank 36, and from there, a pump 37
After passing through the activated carbon tower 38 and absorbing and removing the very small amount of PCB-containing insulating oil remaining in the circulating water to further reduce the oil concentration, the oil is sent to the washing water hot water tank (A) 24. After being adjusted to the temperature, it is sent again to the washing hot water tank (B) 25 and is circulated and used as washing water.
【0040】前記一次洗浄手段2の洗浄装置31として
は、例えば図3に示すような構造のものを使用すること
ができる。図例の洗浄装置31は、内面洗浄ノズル39
と外面洗浄ノズル40とを備え、反転機41により変圧
器ケースAを反転させながら洗浄可能としている。前記
内面洗浄ノズル39としては、変圧器ケースAの内部に
向けて、例えば噴射角30度の二次元形状の固定式ノズ
ルを4本配置してなり、また前記外面洗浄ノズル40と
しては、変圧器ケースAの外周面に向けて、例えば噴射
角60度の二次元形状の固定式ノズルを12本配置して
なる。この一次洗浄装置31の前記内面洗浄ノズル39
及び外面洗浄ノズル40からの洗浄水の噴射圧力として
は、例えば0.8MPa程度の低圧でよく、また洗浄水
の噴射流量としては、例えば22m3/h程度である。
また、ここでの一次洗浄時間は1分程度である。この一
次洗浄においては、変圧器ケースAの内面、内部部材と
してのコアコイル上部、ブッシングなど、後工程におけ
る解体分別作業に際し、作業員が手で触れる部分の油分
を除去し、またケースA外面の埃、鳥の糞などを除去す
る。また、この一次洗浄により、ケースAの油分付着率
は35mg/100cm2程度まで除去される。尚、洗
浄に使用された水は、洗浄室下面の油水槽42に集めら
れ、洗浄水として循環再使用に供される。
As the cleaning device 31 of the primary cleaning means 2, for example, one having a structure as shown in FIG. 3 can be used. The illustrated cleaning device 31 includes an inner surface cleaning nozzle 39.
And an outer surface cleaning nozzle 40, and can perform cleaning while reversing the transformer case A by the reversing machine 41. As the inner surface cleaning nozzle 39, for example, four fixed two-dimensional nozzles having an injection angle of 30 degrees are arranged toward the inside of the transformer case A. As the outer surface cleaning nozzle 40, a transformer is used. For example, twelve two-dimensional fixed nozzles having an injection angle of 60 degrees are arranged toward the outer peripheral surface of the case A. The inner surface cleaning nozzle 39 of the primary cleaning device 31
The jet pressure of the cleaning water from the outer surface cleaning nozzle 40 may be a low pressure of, for example, about 0.8 MPa, and the jet flow rate of the cleaning water is, for example, about 22 m 3 / h.
The primary cleaning time here is about 1 minute. In this primary cleaning, when disassembling and separating in a later step, such as the inner surface of the transformer case A, the upper portion of the core coil as an internal member, and a bushing, oil is removed from a portion touched by an operator, and dust on the outer surface of the case A is removed. , Remove bird droppings. In addition, by this primary cleaning, the oil adhesion rate of Case A is removed to about 35 mg / 100 cm 2 . The water used for washing is collected in an oil tank 42 on the lower surface of the washing chamber, and is reused as washing water.
【0041】次に、前記二次洗浄手段4の洗浄装置30
は、例えば図4に示すような構造のものを使用すること
ができる。図例の洗浄装置30は、内面洗浄ノズル43
と外面洗浄ノズル44とを備えている。前記内面洗浄ノ
ズル43としては、変圧器ケースAの内部に向けて、例
えば噴射角15度の三次元形状の移動式ノズルを4本配
置してなり、また前記外面洗浄ノズル44としては、変
圧器ケースAの外周面に向けて、例えば噴射角60度の
二次元形状の固定式ノズルを12本配置してなる。この
二次洗浄装置30の前記内面洗浄ノズル43及び外面洗
浄ノズル44からの洗浄水の噴射圧力としては、内面洗
浄ノズル43は、例えば8MPa程度の高圧とすること
が好ましく、一方、外面洗浄ノズル44は、例えば0.
8MPa程度の低圧でよい。また洗浄水の噴射流量とし
ては、例えば13m3/h程度である。また、ここでの
二次洗浄時間は2分程度である。この二次洗浄において
は、後工程における溶剤洗浄での処理時間の短縮、洗浄
溶剤の汚染度の抑制を目的として、ケース付着油分を洗
浄除去する。この二次洗浄により、ケースAの油分付着
率は1mg/100cm2程度以下まで除去可能であ
る。尚、洗浄に使用された水は、洗浄室下面の油水槽4
5に集められ、洗浄水として循環再使用に供される。
Next, the cleaning device 30 of the secondary cleaning means 4
For example, a structure as shown in FIG. 4 can be used. The illustrated cleaning device 30 includes an inner surface cleaning nozzle 43.
And an outer surface cleaning nozzle 44. As the inner surface cleaning nozzle 43, for example, four three-dimensional movable nozzles having an injection angle of 15 degrees are arranged toward the inside of the transformer case A. As the outer surface cleaning nozzle 44, a transformer is used. For example, twelve two-dimensional fixed nozzles having an injection angle of 60 degrees are arranged toward the outer peripheral surface of the case A. As for the jet pressure of the washing water from the inner surface cleaning nozzle 43 and the outer surface cleaning nozzle 44 of the secondary cleaning device 30, the inner surface cleaning nozzle 43 is preferably set to a high pressure of, for example, about 8 MPa. Is, for example, 0.
The pressure may be as low as about 8 MPa. Further, the injection flow rate of the washing water is, for example, about 13 m 3 / h. The secondary cleaning time here is about 2 minutes. In this secondary cleaning, the oil adhering to the case is cleaned and removed for the purpose of shortening the processing time in the solvent cleaning in the subsequent process and suppressing the degree of contamination of the cleaning solvent. By this secondary cleaning, the oil adhesion rate of Case A can be removed to about 1 mg / 100 cm 2 or less. The water used for washing is stored in an oil tank 4 on the lower surface of the washing chamber.
5 and used for circulating reuse as washing water.
【0042】そして、溶剤洗浄手段11では、溶剤タン
ク46からポンプ47を介して供給される炭化水素系溶
剤により、前記一次洗浄及び二次洗浄後の変圧器ケース
Aを洗浄し、処理済みケースA’又は鉄鋼原料として再
利用可能とする。ここで使用される溶剤洗浄装置48と
しては、公知の洗浄装置を使用することができる。ま
た、洗浄後の溶剤は、ポンプ49にて溶剤ろ過器50を
通過させてろ過した後、溶剤タンク46へ回収され、循
環使用される。
In the solvent washing means 11, the transformer case A after the primary washing and the secondary washing is washed with the hydrocarbon solvent supplied from the solvent tank 46 via the pump 47, and the treated case A 'Or reusable as steel raw material. As the solvent cleaning device 48 used here, a known cleaning device can be used. The solvent after the washing is filtered by passing it through a solvent filter 50 by a pump 49, and then collected in a solvent tank 46 and circulated.
【0043】前記溶剤洗浄に使用される炭化水素系溶剤
としては、例えばナフテン系炭化水素溶剤、パラフィン
系炭化水素溶剤などを用いることができる。前記ナフテ
ン系炭化水素溶剤は、従来、変圧器の洗浄に一般的に使
用されているノルマルヘキサンに較べて、洗浄能力は若
干劣るものの、引火点、初留点が高く、設備の安全性及
び取扱いの点で有利である。
As the hydrocarbon-based solvent used for the solvent cleaning, for example, a naphthene-based hydrocarbon solvent, a paraffin-based hydrocarbon solvent and the like can be used. Although the naphthenic hydrocarbon solvent has a slightly lower cleaning ability than the normal hexane conventionally used for cleaning transformers, its flash point and initial boiling point are high, and the safety and handling of the equipment are high. It is advantageous in the point.
【0044】変圧器ケースを上記ナフテン系炭化水素溶
剤により洗浄した場合の洗浄性能の測定結果の一例を下
記表3に示す。この表3の結果から、ナフテン系炭化水
素溶剤だけでも十分な洗浄効果があり、一次洗浄及び二
次洗浄後の洗浄溶剤として十分なPCB除去効果を有す
るものであることが明らかである。
Table 3 below shows an example of the measurement results of the cleaning performance when the transformer case was cleaned with the above naphthenic hydrocarbon solvent. From the results in Table 3, it is clear that the naphthenic hydrocarbon solvent alone has a sufficient cleaning effect, and has a sufficient PCB removing effect as a cleaning solvent after the primary cleaning and the secondary cleaning.
【0045】[0045]
【表3】 [Table 3]
【0046】[0046]
【発明の効果】本発明によれば、PCBを含む絶縁油を
使用した配電用柱上変圧器の無害化処理に際し、現在、
法的に認められている変圧器ケースの溶剤洗浄におい
て、水による洗浄を併用することで、溶剤使用量の低減
を可能とし、且つ、洗浄溶剤として、より安全性及び取
扱い性に優れたものを使用することが可能となる。
According to the present invention, when detoxifying a pole transformer for power distribution using insulating oil containing PCB, at present,
In the legally recognized solvent cleaning of transformer cases, the use of water together with cleaning enables the reduction of the amount of solvent used, and a cleaning solvent that is more safe and easier to handle. It can be used.
【0047】また、従来の炭化水素系溶剤によるPCB
含有絶縁油を使用した変圧器の洗浄においては、溶剤か
らのPCBを含有する絶縁油の分離手段が複雑で装置の
経済的負担も大きいものであったが、本発明方法におけ
る水洗浄の場合には、油水の比重差による分離及び吸着
分離により、PCB含有油を簡単な装置で容易に分離可
能であり、経済的負担も軽減できる。
In addition, a conventional hydrocarbon-based PCB
In the cleaning of the transformer using the insulating oil containing, the means for separating the insulating oil containing PCB from the solvent is complicated and the equipment is economically heavy. Can separate PCB-containing oil easily with a simple device by separation and adsorption separation based on the difference in specific gravity of oil and water, and the economic burden can be reduced.
【図面の簡単な説明】[Brief description of the drawings]
【図1】 本発明に係る配電用柱上変圧器の無害化処理
方法を実施するための処理装置の一実施形態を示すブロ
ック図。
FIG. 1 is a block diagram showing an embodiment of a processing apparatus for performing a method for detoxifying a pole transformer for power distribution according to the present invention.
【図2】 本発明に係る配電用柱上変圧器の無害化処理
方法を実施するための処理設備の一実施例を示すブロッ
ク図。
FIG. 2 is a block diagram showing an embodiment of a processing facility for performing the method for detoxifying a pole transformer for power distribution according to the present invention.
【図3】 前記無害化処理設備における一次洗浄装置の
一実施例を示す断面説明図。
FIG. 3 is an explanatory sectional view showing one embodiment of a primary cleaning device in the detoxification processing equipment.
【図4】 前記無害化処理設備における二次洗浄装置の
一実施例を示す断面説明図。
FIG. 4 is an explanatory cross-sectional view showing one embodiment of a secondary cleaning device in the detoxification processing equipment.
【符号の説明】[Explanation of symbols]
1:残油抜取り手段、2:一次洗浄手段、3:解体・分
別手段、4:二次洗浄手段、5:温水供給手段、6:油
水分離手段、7:油回収手段、8:換気処理手段、9:
排気処理手段、10:換気処理手段、11:溶剤洗浄手
段、12:溶剤供給手段、13:排気処理手段、14:
溶剤処理手段、15:油処理手段、16:搬送設備、1
7:残油ろ過器、18:油受けタンク、19:ポンプ、
20:絶縁油無害化装置、21:ポンプ、22:スラッ
ジ回収フィルター、23:油水分離器、24:洗浄水温
水タンク(A)、25:洗浄水温水タンク(B)、2
6:ヒーター、27〜29:ポンプ、30:二次洗浄装
置、31:一次洗浄装置、32,33:ポンプ、34:
油水受けタンク、35:ポンプ、36:分離水受けタン
ク、37:ポンプ、38:活性炭塔、39:内面洗浄ノ
ズル、40:外面洗浄ノズル、41:反転機、42:油
水槽、43:内面洗浄ノズル、44:外面洗浄ノズル、
45:油水槽、46:溶剤タンク、47:ポンプ、4
8:溶剤洗浄装置、49:ポンプ、50:溶剤ろ過器。
1: means for removing residual oil, 2: primary cleaning means, 3: dismantling / separating means, 4: secondary cleaning means, 5: hot water supply means, 6: oil / water separation means, 7: oil recovery means, 8: ventilation treatment means , 9:
Exhaust processing means, 10: ventilation processing means, 11: solvent cleaning means, 12: solvent supply means, 13: exhaust processing means, 14:
Solvent treatment means, 15: oil treatment means, 16: transport equipment, 1
7: Residual oil filter, 18: Oil receiving tank, 19: Pump,
20: Insulating oil detoxifying device, 21: Pump, 22: Sludge recovery filter, 23: Oil / water separator, 24: Washing water hot water tank (A), 25: Washing water hot water tank (B), 2
6: heater, 27-29: pump, 30: secondary cleaning device, 31: primary cleaning device, 32, 33: pump, 34:
Oil / water receiving tank, 35: pump, 36: separated water receiving tank, 37: pump, 38: activated carbon tower, 39: inner surface cleaning nozzle, 40: outer surface cleaning nozzle, 41: reversing machine, 42: oil water tank, 43: inner surface cleaning Nozzle, 44: outer surface cleaning nozzle,
45: oil tank, 46: solvent tank, 47: pump, 4
8: solvent washing device, 49: pump, 50: solvent filter.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 片山 栄治 大阪府大阪市港区福崎3丁目1番176号 株式会社関西テック総合技術センタ内 Fターム(参考) 2E191 BA13 BC05 BD11 4D004 AA50 AB06 CA02 CA13 CA40 CA42 CC03 CC04 CC06 5E050 CA03 CA10  ────────────────────────────────────────────────── ─── Continued on the front page (72) Eiji Katayama 3-1-1, Fukuzaki, Minato-ku, Osaka-shi, Osaka F-term in Kansai Tec Technology Center Co., Ltd. (Reference) 2E191 BA13 BC05 BD11 4D004 AA50 AB06 CA02 CA13 CA40 CA42 CC03 CC04 CC06 5E050 CA03 CA10

Claims (15)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 多塩素化ビフェニルを含む絶縁油を使用
    した配電用柱上変圧器から前記絶縁油を吸引又は滴下抜
    油した後、水で洗浄し、更に炭化水素系溶剤で洗浄する
    ことを特徴とする配電用柱上変圧器の無害化処理方法。
    Claims 1. A method according to claim 1, wherein the insulating oil is suctioned or dropped from a pole transformer for power distribution using insulating oil containing polychlorinated biphenyl, washed with water, and further washed with a hydrocarbon solvent. Method of detoxifying power distribution pole transformers.
  2. 【請求項2】 前記抜油した変圧器を水で一次洗浄した
    後、ケースと内部部材とに解体・分別し、ケースを水で
    二次洗浄し、更に炭化水素系溶剤で洗浄する請求項1記
    載の無害化処理方法。
    2. The method according to claim 1, wherein the drained transformer is primarily washed with water, then disassembled and separated into a case and an internal member, the case is secondarily washed with water, and further washed with a hydrocarbon solvent. Detoxification method.
  3. 【請求項3】 前記水による洗浄をウォータージェット
    により行う請求項1又は2に記載の無害化処理方法。
    3. The detoxification method according to claim 1, wherein the washing with water is performed by a water jet.
  4. 【請求項4】 前記一次洗浄は低水圧ジェット洗浄で行
    い、前記二次洗浄を高水圧ジェット洗浄で行う請求項3
    記載の無害化処理方法。
    4. The primary cleaning is performed by low-pressure jet cleaning, and the secondary cleaning is performed by high-pressure jet cleaning.
    The detoxification treatment method described in the above.
  5. 【請求項5】 前記一次洗浄を二次元形状のノズルによ
    り行い、前記二次洗浄はケース内面を三次元形状のノズ
    ルにより、またケース外面を二次元形状のノズルにより
    行う請求項2〜4のいずれかに記載の無害化処理方法。
    5. The method according to claim 2, wherein the primary cleaning is performed by a two-dimensional nozzle, and the secondary cleaning is performed by a three-dimensional nozzle on the inner surface of the case and a two-dimensional nozzle on the outer surface of the case. The detoxification treatment method described in the above.
  6. 【請求項6】 前記水による洗浄を温水で行う請求項1
    〜5のいずれかに記載の無害化処理方法。
    6. The method according to claim 1, wherein the washing with water is performed with warm water.
    The detoxification treatment method according to any one of claims 1 to 5.
  7. 【請求項7】 前記柱上変圧器から抜き取った絶縁油
    を、アルカリ金属ターシャリーブトキシドを反応剤とし
    て加熱撹拌することで無害化する請求項1記載の無害化
    処理方法。
    7. The detoxification method according to claim 1, wherein the insulating oil extracted from the pole transformer is detoxified by heating and stirring using an alkali metal tertiary butoxide as a reactant.
  8. 【請求項8】 前記洗浄後の水を、油水分離器により油
    分を分離した後、洗浄水として循環利用する請求項1記
    載の無害化処理方法。
    8. The detoxification method according to claim 1, wherein the water after the washing is separated from oil by an oil-water separator and then circulated as washing water.
  9. 【請求項9】 前記分離された油分を、アルカリ金属タ
    ーシャリーブトキシドを反応剤として加熱撹拌すること
    で無害化する請求項8記載の無害化処理方法。
    9. The detoxifying method according to claim 8, wherein the separated oil is detoxified by heating and stirring using an alkali metal tertiary butoxide as a reactant.
  10. 【請求項10】 前記洗浄後の炭化水素系溶剤を、アル
    カリ金属ターシャリーブトキシドを反応剤として加熱撹
    拌することで無害化する請求項1記載の無害化処理方
    法。
    10. The detoxification treatment method according to claim 1, wherein the hydrocarbon solvent after the washing is detoxified by heating and stirring using an alkali metal tert-butoxide as a reactant.
  11. 【請求項11】 多塩素化ビフェニルを含む絶縁油を使
    用した配電用柱上変圧器から吸引又は滴下により前記絶
    縁油を抜油する残油抜取り手段と、前記抜油した変圧器
    を水で洗浄する一次洗浄手段と、前記一次洗浄した変圧
    器をケースと内部部材とに解体、分別する解体・分別手
    段と、前記内部部材を解体、分別した後のケースを水で
    洗浄する二次洗浄手段と、前記二次洗浄後のケースを炭
    化水素系溶剤で洗浄する溶剤洗浄手段とを備えることを
    特徴とする配電用柱上変圧器の無害化処理装置。
    11. A residual oil extracting means for draining the insulating oil by suction or dropping from a power distribution pole transformer using an insulating oil containing polychlorinated biphenyl, and a primary for washing the drained transformer with water. Cleaning means, disassembly / separation means for disassembling the primary-washed transformer into a case and an internal member, disassembly / separation means for disassembling the internal member, secondary washing means for washing the separated case with water, A detoxification apparatus for a power distribution pole transformer, comprising: a solvent cleaning means for cleaning the case after the secondary cleaning with a hydrocarbon-based solvent.
  12. 【請求項12】 前記一次洗浄手段、二次洗浄手段及び
    溶剤洗浄手段が乾燥手段を備える請求項11記載の無害
    化処理装置。
    12. The detoxifying apparatus according to claim 11, wherein the primary cleaning unit, the secondary cleaning unit, and the solvent cleaning unit include a drying unit.
  13. 【請求項13】 前記一次洗浄手段及び二次洗浄手段が
    洗浄水から油分を分離する油水分離手段を備える請求項
    11記載の無害化処理装置。
    13. The detoxifying apparatus according to claim 11, wherein the primary cleaning unit and the secondary cleaning unit include an oil-water separation unit that separates an oil component from the cleaning water.
  14. 【請求項14】 前記一次洗浄手段、二次洗浄手段、解
    体・分別手段及び溶剤洗浄手段が換気処理手段又は排気
    処理手段を備える室内に設けられている請求項11記載
    の無害化処理装置。
    14. The detoxifying apparatus according to claim 11, wherein the primary cleaning means, the secondary cleaning means, the disassembly / separation means and the solvent cleaning means are provided in a room provided with a ventilation processing means or an exhaust processing means.
  15. 【請求項15】 前記換気処理手段及び排気処理手段が
    冷却手段、気液分離手段及び活性炭吸着手段を備える請
    求項14記載の無害化処理装置。
    15. The detoxification processing apparatus according to claim 14, wherein the ventilation processing means and the exhaust processing means include a cooling means, a gas-liquid separation means, and an activated carbon adsorption means.
JP2000059286A 2000-03-03 2000-03-03 Detoxification method for pole transformer case for power distribution Expired - Lifetime JP3777941B2 (en)

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JP2006289288A (en) * 2005-04-12 2006-10-26 Nichiyo Engineering Kk Method for detoxifying pole-mounted transformer including pcb-mixed insulating oil
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JP2006334572A (en) * 2005-06-06 2006-12-14 Nichiyo Engineering Kk Method for rendering transformer containing insulating oil contaminated with pcb harmless
JP2007007583A (en) * 2005-06-30 2007-01-18 Toshiba Corp Washing method and washing apparatus for contaminated container
JP2007301416A (en) * 2006-01-19 2007-11-22 Nippon Steel Engineering Co Ltd Treatment method for pcb waste and its treatment facility
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