JP7082598B2 - How to clean PCB contaminated equipment - Google Patents

How to clean PCB contaminated equipment Download PDF

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JP7082598B2
JP7082598B2 JP2019167509A JP2019167509A JP7082598B2 JP 7082598 B2 JP7082598 B2 JP 7082598B2 JP 2019167509 A JP2019167509 A JP 2019167509A JP 2019167509 A JP2019167509 A JP 2019167509A JP 7082598 B2 JP7082598 B2 JP 7082598B2
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隆宏 梅本
敏彦 前村
一彦 大井
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Ｊｆｅ環境テクノロジー株式会社
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、洗浄油を循環使用して、ＰＣＢ汚染機器をクリーニングする方法に関し、詳しくは、洗浄油を循環使用することにより、洗浄油の消費量を削減すると共に、ＰＣＢが移行した低濃度ＰＣＢ汚染物を含む廃液量を削減する方法に関する。 The present invention relates to a method for cleaning PCB-contaminated equipment by circulating cleaning oil. Specifically, the present invention reduces the consumption of cleaning oil by circulating the cleaning oil, and the low-concentration PCB to which PCB is transferred. It relates to a method for reducing the amount of waste liquid containing contaminants.

ＰＣＢ（ポリ塩化ビフェニル）は、安定性、不燃性、電気絶縁性に優れていることから、コンデンサやトランス等の電気機器の絶縁油に多用されていたが、後に、その難分解性と毒性とが明らかとなり新たな使用が禁じられている。 PCB (polychlorinated biphenyl) was often used as an insulating oil for electrical equipment such as capacitors and transformers because of its excellent stability, nonflammability, and electrical insulation. Has become clear and new use is prohibited.

ＰＣＢを含有する絶縁油が既に含まれているコンデンサやトランス等のＰＣＢ汚染機器については回収措置がとられ、特別な施設において無害化処理が実施されている。 PCB-contaminated equipment such as capacitors and transformers that already contain PCB-containing insulating oil have been recovered and detoxified in special facilities.

特許第５６３９９３２号Patent No. 536932 特許第５６３９９３１号Patent No. 5639931

特許文献１には、ＰＣＢ含有絶縁油を含む機器を洗浄油で洗浄するための洗浄部と、洗浄によって生じたＰＣＢ含有洗浄油を蒸留して再生洗浄油を作製するための蒸留再生部とを有し、ＰＣＢ含有洗浄油をＰＣＢ含有洗浄油よりもＰＣＢ濃度の低い留出液とＰＣＢ濃度の高い缶出液とに分離するための蒸留塔が蒸留再生部に備えられているＰＣＢ汚染機器無害化設備の解体方法が開示されている。 Patent Document 1 includes a cleaning unit for cleaning equipment containing PCB-containing insulating oil with cleaning oil, and a distillation regeneration unit for distilling the PCB-containing cleaning oil generated by cleaning to produce recycled cleaning oil. The distillation regeneration unit is equipped with a distillation tower for separating the PCB-containing cleaning oil into a distillate having a lower PCB concentration and a canned liquid having a higher PCB concentration than the PCB-containing cleaning oil. The method of dismantling the chemical facility is disclosed.

特許文献２には、特許文献１で用いた蒸留塔を効率良く無害化して解体する方法が開示されている。 Patent Document 2 discloses a method for efficiently detoxifying and disassembling the distillation column used in Patent Document 1.

しかし、この特許文献１及び２の無害化施設では、ＰＣＢにＴＣＢ（トリクロロベンゼン）が混在する場合のＰＣＢ汚染機器の洗浄についての検討がなされていない。 However, in the detoxification facilities of Patent Documents 1 and 2, no study has been made on cleaning of PCB-contaminated equipment when TCB (trichlorobenzene) is mixed in PCB.

そこで、本発明の課題は、ＰＣＢにＴＣＢが混在する場合に、廃液量の削減を図ると共に、洗浄油の使用量の削減ができるＰＣＢ汚染機器をクリーニングする方法を提供することにある。 Therefore, an object of the present invention is to provide a method for cleaning a PCB-contaminated device capable of reducing the amount of waste liquid and reducing the amount of cleaning oil used when TCB is mixed in PCB.

本発明の他の課題は、以下の記載によって明らかとなる。 Other problems of the present invention will be clarified by the following description.

以下、本発明の課題は、以下の各発明によって解決される。 Hereinafter, the subject of the present invention will be solved by each of the following inventions.

（請求項１）
ＰＣＢ汚染機器から抜油されたＰＣＢやＴＣＢを含有する絶縁油を受け入れ、且つ抜油後のＰＣＢ汚染機器を洗浄し、ＰＣＢやＴＣＢを含有する抜油と、ＰＣＢを含有する抜油と、ＴＣＢ、ＰＣＢ、水、洗浄油を含む洗浄廃液とを排出する抜油洗浄装置を備え、
前記洗浄廃液は、洗浄油バッファ槽に送られ、
前記ＰＣＢとＴＣＢを含む抜油は、ＴＣＢ分離塔に送られ、蒸留され、ＴＣＢは留出液中に分離され、ＰＣＢは缶出液中に分離され、
該ＴＣＢ分離塔で留出液に分離されたＴＣＢは、ＴＣＢ分離塔還流槽に送られ、該ＴＣＢ分離塔還流槽に集められたＴＣＢの一部は、所定のＰＣＢ濃度以下になっていたら、前記洗浄油バッファ槽に返送ラインを介して返送され、前記洗浄廃液と混合され、
前記洗浄廃液は、前記洗浄油バッファ槽を介して粗洗浄水分離塔に送られ、水を含む留出液と、ＴＣＢ、ＰＣＢ及び洗浄油を含む缶出液とに、蒸留されて分離され、
該粗洗浄水分離塔の蒸留によって得られたＴＣＢ、ＰＣＢ及び洗浄油を含む缶出液は、粗洗浄油回収塔に送られ、洗浄油を含む留出液と、ＴＣＢ及びＰＣＢとを含む缶出液とに、蒸留して分離され、
前記粗洗浄油回収塔の蒸留によって得られた洗浄油を含む留出液は、粗洗浄油回収槽を介して前記抜油洗浄装置で再利用されることを特徴とするＰＣＢ汚染機器をクリーニングする方法。
（請求項２）
前記粗洗浄油回収塔の蒸留によって得られたＴＣＢ及びＰＣＢを含む缶出液は、ＰＣＢとＴＣＢを含む抜油と混合されることを特徴とする請求項１記載のＰＣＢ汚染機器をクリーニングする方法。
（請求項３）
前記ＴＣＢ分離塔において、ＰＣＢを含む缶出液は、第１蒸留塔に送られ、ＴＣＢを含む留出液と、ＰＣＢを含む缶出液に分離し、該缶出液は、無害化処理設備に送り、無害化処理することを特徴とする請求項１又は２記載のＰＣＢ汚染機器をクリーニングする方法。 (Claim 1)
Accepts insulating oil containing PCB or TCB degreased from PCB contaminated equipment, cleans the deoiled PCB contaminated equipment, degreased PCB or TCB, degreased containing PCB, TCB, PCB, water Equipped with a degreasing cleaning device that discharges cleaning waste liquid containing cleaning oil,
The cleaning waste liquid is sent to the cleaning oil buffer tank and sent to the cleaning oil buffer tank.
The degreased oil containing the PCB and TCB is sent to a TCB separation column and distilled, the TCB is separated in the distillate, and the PCB is separated in the canned liquid.
The TCB separated into the distillate in the TCB separation column is sent to the TCB separation column reflux tank, and if a part of the TCB collected in the TCB separation column reflux tank is below the predetermined PCB concentration, It is returned to the cleaning oil buffer tank via a return line, mixed with the cleaning waste liquid, and is mixed with the cleaning waste liquid.
The cleaning waste liquid is sent to a rough cleaning water separation tower via the cleaning oil buffer tank, and is distilled and separated into a distillate containing water and a canned liquid containing TCB, PCB and cleaning oil.
The canned liquid containing TCB, PCB and cleaning oil obtained by distillation of the rough washing water separation tower is sent to the rough washing oil recovery tower, and the distillate containing cleaning oil and the can containing TCB and PCB are sent. Distilled and separated into the effluent,
A method for cleaning PCB-contaminated equipment, which comprises reusing the distillate containing cleaning oil obtained by distillation of the rough cleaning oil recovery tower in the oil removal cleaning device via a rough cleaning oil recovery tank. ..
(Claim 2 )
The method for cleaning a PCB-contaminated device according to claim 1, wherein the canned out liquid containing the TCB and the PCB obtained by the distillation of the rough cleaning oil recovery tower is mixed with the PCB and the degreased oil containing the TCB.
(Claim 3 )
In the TCB separation column, the canned out liquid containing PCB is sent to the first distillation column and separated into a distillate containing TCB and a canned out liquid containing PCB, and the canned out liquid is detoxified by a detoxification treatment facility. The method for cleaning a PCB-contaminated device according to claim 1 or 2 , characterized in that it is sent to a detoxified treatment.

本発明によれば、ワンパスでなく洗浄油を循環使用することにより、洗浄油の消費量を削減すると共に、ＰＣＢが移行した低濃度ＰＣＢ汚染物を含む廃液量を削減できるＰＣＢ汚染機器をクリーニングする方法を提供することができる。 According to the present invention, by circulating cleaning oil instead of one-pass, the consumption of cleaning oil can be reduced, and the amount of waste liquid containing low-concentration PCB contaminants to which PCB has been transferred can be reduced to clean PCB-contaminated equipment. A method can be provided.

ＰＣＢとＴＣＢを含む絶縁油を含むトランス等のＰＣＢ汚染機器からＰＣＢを分離する設備の一例を示す処理フロー図Processing flow diagram showing an example of equipment for separating PCB from PCB-contaminated equipment such as a transformer containing insulating oil containing PCB and TCB. ＰＣＢとＴＣＢを含む絶縁油を含むトランス等のＰＣＢ汚染機器からＰＣＢを分離する設備の一例を示すブロック図Block diagram showing an example of equipment that separates PCBs from PCB-contaminated equipment such as transformers containing insulating oil containing PCBs and TCBs.

以下、本発明の実施の形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、ＰＣＢとＴＣＢを含む絶縁油を含むトランス等のＰＣＢ汚染機器からＰＣＢを分離する設備の一例を示す処理フロー図であり、図２は、ＰＣＢとＴＣＢを含む絶縁油を含むトランス等のＰＣＢ汚染機器からＰＣＢを分離する設備の一例を示すブロック図である。 FIG. 1 is a processing flow diagram showing an example of equipment for separating PCB from PCB-contaminated equipment such as a transformer containing insulating oil containing PCB and TCB, and FIG. 2 is a transformer containing insulating oil containing PCB and TCB. It is a block diagram which shows an example of the equipment which separates a PCB from a PCB contaminated equipment of.

１は、抜油洗浄装置である。この装置は、抜油装置と粗洗浄装置の二つの機能を備える。 Reference numeral 1 is an oil removal cleaning device. This device has two functions, an oil draining device and a rough cleaning device.

抜油装置は、複数設けられてもよく、例えば老朽化してＰＣＢが漏洩するおそれがあるトランスやコンデンサを受け入れる抜油装置、漏洩するおそれのない大型のトランスやコンデンサを受け入れる抜油装置、小型のトランスやコンデンサを受け入れる抜油装置であってもよい。抜油を行うに際しては、例えばトランスなどのケーシングに開けた孔から内部のＰＣＢやＴＣＢ含有絶縁油を抜取る。 A plurality of oil removing devices may be provided, for example, an oil removing device that accepts a transformer or a capacitor that is aged and may leak PCB, an oil removing device that accepts a large transformer or a capacitor that does not leak, a small transformer or a capacitor. It may be an oil draining device that accepts. When draining oil, for example, the insulating oil containing PCB or TCB inside is drained from a hole made in a casing such as a transformer.

本実施の形態では、抜油装置は、大型抜油室、漏洩品抜油室、小型抜油室を備えることが好ましい。 In the present embodiment, the oil removal device preferably includes a large oil removal chamber, a leaked product oil removal chamber, and a small oil removal chamber.

上記の抜油を行った後、洗浄装置によって洗浄を行う。具体的には、洗浄油でトランスやコンデンサの内部をクリーニング洗浄する。かかる洗浄によって洗浄廃液が発生する。 After removing the oil as described above, cleaning is performed by a cleaning device. Specifically, the inside of the transformer and the capacitor is cleaned with cleaning oil. Cleaning waste liquid is generated by such cleaning.

なお、抜油洗浄装置１によって、内部洗浄されたトランスをケーシングと内部機器などに図示しない粗解体装置によって解体する。
抜油洗浄装置１によって抜油し、洗浄された後、複数に分岐される。 The transformer that has been internally cleaned by the oil removal cleaning device 1 is disassembled by a rough dismantling device (not shown) on the casing and internal equipment.
Oil is drained by the oil draining cleaning device 1, and after cleaning, the product is branched into a plurality of parts.

ＰＣＢとＴＣＢを含む抜油は、ライン２００を介して、ＫＣ１０００相当貯槽２に送られる。またＰＣＢを含む抜油は、ライン３００を介して、ＫＣ５００相当貯槽３に送られる。洗浄廃液は、ライン４００を介して洗浄油バッファ槽４に送られる。ライン２００を介しては、ＰＣＢとＴＣＢを含む抜油だけでなく、後述するライン４０１を介して、粗洗浄油回収槽１３から回収された洗浄油もＫＣ１０００相当貯槽２に送られる。ライン２００に付着するＰＣＢを洗浄するためである。 The degreased oil containing PCB and TCB is sent to the KC1000 equivalent storage tank 2 via the line 200. Further, the degreased oil containing PCB is sent to the storage tank 3 equivalent to KC500 via the line 300. The cleaning waste liquid is sent to the cleaning oil buffer tank 4 via the line 400. Not only the oil draining including PCB and TCB but also the cleaning oil recovered from the rough cleaning oil recovery tank 13 is sent to the KC1000 equivalent storage tank 2 via the line 200, which will be described later. This is to clean the PCB adhering to the line 200.

ここで、日本国内で主に使用された製品ＰＣＢには、カネクロール（登録商標）（ＫＣ）とアロクロールがあり、それぞれ塩素数等によっていくつかの種類がある。例えば、ＫＣ５００は、五塩化ビフェニルを主成分とするものであり、ＫＣ１０００は、ＫＣ５００にＴＣＢが混合したものである。なお、これ以外に、三塩化ビフェニルを主成分とするＫＣ３００、四塩化ビフェニルを主成分とするＫＣ４００等がある。 Here, the product PCBs mainly used in Japan include Kanechlor (registered trademark) (KC) and Arochlor, and there are several types of each depending on the number of chlorine and the like. For example, KC500 contains biphenyl pentachloride as a main component, and KC1000 is a mixture of KC500 and TCB. In addition to this, there are KC300 containing biphenyl trichloride as a main component, KC400 containing biphenyl tetrachloride as a main component, and the like.

洗浄油としては、三塩化ベンゼン（ＴＣＢ）に類似の物質であることが好ましく、炭化水素系高機能洗浄油が例示でき、例えば、ＨＣ－２５０（東ソー社製）、ＮＳクリーン２２０（ＪＸＴＧエネルギー社製）が例示できる。これ以外にも、ＨＣ－２５０相当品、ＮＳクリーン２２０相当品であってもよく、沸点がＴＣＢより低く、ＰＣＢ汚染機器の洗浄に際し、ＰＣＢ汚染機器の内部に付着したＰＣＢを剥離できるものであればよい。 The cleaning oil is preferably a substance similar to benzene trichloride (TCB), and examples thereof include hydrocarbon-based high-performance cleaning oils such as HC-250 (manufactured by Tosoh Corporation) and NS Clean 220 (manufactured by JXTG Energy Co., Ltd.). Manufactured) can be exemplified. In addition to this, HC-250 equivalent products and NS Clean 220 equivalent products may be used, and they have a boiling point lower than that of TCB and can peel off the PCB adhering to the inside of the PCB contaminated equipment when cleaning the PCB contaminated equipment. Just do it.

ＫＣ１０００相当貯槽２に送られたＰＣＢとＴＣＢを含む抜油、及び洗浄油は、トランス油受槽５を介して、ＴＣＢ分離塔６に送られ、ＴＣＢ分離塔６で蒸留される。 The oil draining and cleaning oil containing PCB and TCB sent to the KC1000 equivalent storage tank 2 is sent to the TCB separation tower 6 via the transformer oil receiving tank 5 and distilled in the TCB separation tower 6.

ＴＣＢ分離塔６では、ＴＣＢとＰＣＢを分離する温度に設定され蒸留される。これによって、ＴＣＢより沸点の低い洗浄油は、もちろんのこと、ＴＣＢも蒸発し、留出液として得られる。得られた留出液は、ＴＣＢ分離塔還流槽７に送られる。 In the TCB separation column 6, the temperature is set to separate the TCB and the PCB, and distillation is performed. As a result, not only the cleaning oil having a boiling point lower than that of TCB but also the TCB is evaporated and obtained as a distillate. The obtained distillate is sent to the TCB separation tower reflux tank 7.

一方で、ＴＣＢ分離塔６の蒸留で、ＰＣＢは蒸発しないため、缶出液として得られる。しかし、缶出液には、少量のＴＣＢも蒸発しないで残っている場合もある。 On the other hand, the PCB is not evaporated by the distillation of the TCB separation column 6, so that it can be obtained as a canned liquid. However, even a small amount of TCB may remain in the canned liquid without evaporation.

このため、この缶出液は、第１蒸留塔８に送られる。第１蒸留塔８では、少量のＴＣＢとＰＣＢとを分離するように蒸留される。第１蒸留塔８の留出液は、ＴＣＢのみとなるため、第１蒸留塔還流槽９に送られ、第１蒸留塔８に戻されたり、トランス油受槽５に戻される。 Therefore, this canned liquid is sent to the first distillation column 8. In the first distillation column 8, a small amount of TCB and PCB are distilled so as to be separated. Since the distillate of the first distillation column 8 is only TCB, it is sent to the first distillation column recirculation tank 9 and returned to the first distillation column 8 or the transformer oil receiving tank 5.

第１蒸留塔８の蒸留によって得られた缶出液は、ＴＣＢが蒸発するので、ＰＣＢのみとなる。この缶出液は、ＫＣ５００相当貯槽３に送られる。 Since the TCB evaporates, the canned liquid obtained by the distillation of the first distillation column 8 is only PCB. This canned liquid is sent to the storage tank 3 equivalent to KC500.

ＴＣＢ分離塔還流槽７に集められたＴＣＢの一部は、所定のＰＣＢ濃度以下になっていたら、洗浄油と共にＴＣＢ分析待槽１０に送られ、必要量が洗浄油バッファ槽４に回収される。ＴＣＢ分離塔還流槽７に集められた洗浄油、及びＴＣＢの一部をＴＣＢ分析待槽１０に送ることによる効果については、後述する。 If a part of the TCB collected in the TCB separation tower recirculation tank 7 is below the predetermined PCB concentration, it is sent to the TCB analysis waiting tank 10 together with the cleaning oil, and the required amount is collected in the cleaning oil buffer tank 4. .. The effects of sending the cleaning oil collected in the TCB separation tower reflux tank 7 and a part of the TCB to the TCB analysis waiting tank 10 will be described later.

次に、ＰＣＢを主として含む抜油は、ライン３００を介してＫＣ５００相当貯槽３に送られる。また、第１蒸留塔８の蒸留によって得られた缶出液も、ＫＣ５００相当貯槽３に送られる。ＫＣ５００相当貯槽３に貯留された回収ＰＣＢは、図示しない無害化処理設備に送られ無害化処理される。 Next, the degreased oil mainly containing PCB is sent to the KC500 equivalent storage tank 3 via the line 300. Further, the canned liquid obtained by the distillation of the first distillation column 8 is also sent to the KC500 equivalent storage tank 3. The recovered PCB stored in the KC500 equivalent storage tank 3 is sent to a detoxification treatment facility (not shown) for detoxification treatment.

最後に、ライン４００を介して洗浄油バッファ槽４に送られたＴＣＢ、ＰＣＢ、水、洗浄油を含む洗浄廃液と、ＴＣＢ分析待槽１０から送られたＴＣＢは、洗浄油バッファ槽４から粗洗浄水分離塔１１に送られ、水と、ＴＣＢ、ＰＣＢ及び洗浄油とに、蒸留されて分離される。
粗洗浄水分離塔１１の蒸留によって得られた留出液は、水であるため、その水は系外に排出される。 Finally, the cleaning waste liquid containing TCB, PCB, water, and cleaning oil sent to the cleaning oil buffer tank 4 via the line 400 and the TCB sent from the TCB analysis waiting tank 10 are crude from the cleaning oil buffer tank 4. It is sent to the washing water separation tower 11 and is distilled and separated into water and TCB, PCB and washing oil.
Since the distillate obtained by the distillation of the rough washing water separation tower 11 is water, the water is discharged to the outside of the system.

粗洗浄水分離塔１１の蒸留によって得られた缶出液は、ＴＣＢ、ＰＣＢ及び洗浄油であるため、粗洗浄油回収塔１２に送られ、洗浄油と、ＴＣＢ及びＰＣＢとに蒸留して分離される。 Since the canned out liquid obtained by the distillation of the rough cleaning water separation tower 11 is TCB, PCB and cleaning oil, it is sent to the rough cleaning oil recovery tower 12 and distilled into the cleaning oil and TCB and PCB to separate them. Will be done.

粗洗浄油回収塔１２の蒸留によって得られた留出液は、洗浄油であるため、この留出液は、ライン４０１を介して粗洗浄油回収槽１３に送られ、粗洗浄油回収槽１３に回収された洗浄油は、抜油洗浄装置１でクリーニングに要する洗浄油が再利用される。これにより新規な洗浄油の使用量を削減できる。 Since the distillate obtained by the distillation of the rough cleaning oil recovery tower 12 is cleaning oil, this distillate is sent to the rough cleaning oil recovery tank 13 via the line 401, and the rough cleaning oil recovery tank 13 is used. As for the cleaning oil recovered in the above, the cleaning oil required for cleaning is reused in the degreasing cleaning device 1. As a result, the amount of new cleaning oil used can be reduced.

粗洗浄油回収塔１２の蒸留によって得られた缶出液は、ＴＣＢ及びＰＣＢが含まれているため、ライン４０２を介して、ＫＣ１０００相当貯槽２に送られる。 Since the canned liquid obtained by the distillation of the rough cleaning oil recovery tower 12 contains TCB and PCB, it is sent to the KC1000 equivalent storage tank 2 via the line 402.

ＴＣＢ及びＰＣＢが含まれる缶出液は、前述のＰＣＢとＴＣＢを含む抜油と共に、トランス油受槽５を介して、ＴＣＢ分離塔６に送られ、該ＴＣＢ分離塔６で蒸留される。この蒸留については、前述した。 The canned liquid containing the TCB and the PCB is sent to the TCB separation tower 6 via the transformer oil receiving tank 5 together with the oil draining containing the PCB and the TCB described above, and is distilled in the TCB separation tower 6. This distillation has been described above.

第１蒸留塔８の蒸留によって得られた缶出液は、ＴＣＢが蒸発するので、ＰＣＢのみとなる。この缶出液は、ＫＣ５００相当貯槽３に送られる。ＫＣ５００相当貯槽３に貯留された回収ＰＣＢは、図示しない無害化処理設備に送られ無害化処理される。 Since the TCB evaporates, the canned liquid obtained by the distillation of the first distillation column 8 is only PCB. This canned liquid is sent to the storage tank 3 equivalent to KC500. The recovered PCB stored in the KC500 equivalent storage tank 3 is sent to a detoxification treatment facility (not shown) for detoxification treatment.

本発明においては、返送ライン２０１を設けることが一つの特徴である。すなわち、ＴＣＢ分離塔還流槽７に集められた洗浄油、及びＴＣＢの一部が、ＴＣＢ分析待槽１０に送られ、洗浄油バッファ槽４に返送ライン２０１を介して、返送され、再利用される。 One of the features of the present invention is to provide a return line 201. That is, the cleaning oil collected in the TCB separation tower reflux tank 7 and a part of the TCB are sent to the TCB analysis waiting tank 10, returned to the cleaning oil buffer tank 4 via the return line 201, and reused. Ru.

これにより、洗浄油バッファ槽４に洗浄廃液として回収されたＴＣＢ、ＰＣＢ及び洗浄油に、洗浄油の量が返送ライン２０１を介して増加されているため、粗洗浄油回収塔１２によって蒸留する際の洗浄油量が増加される。 As a result, the amount of cleaning oil is increased in the TCB, PCB and cleaning oil recovered as cleaning waste liquid in the cleaning oil buffer tank 4 via the return line 201, so that when the oil is distilled by the rough cleaning oil recovery tower 12. The amount of cleaning oil is increased.

その結果、粗洗浄油回収塔１２の蒸留により、洗浄廃液に含まれる洗浄油の回収量が増加され、洗浄油の循環再利用量を増やせることができる。このため、新規な洗浄油の使用量の削減が可能となる。 As a result, by distillation of the rough cleaning oil recovery tower 12, the amount of cleaning oil recovered from the cleaning waste liquid can be increased, and the amount of circulating and reused cleaning oil can be increased. Therefore, it is possible to reduce the amount of new cleaning oil used.

１ ：抜油洗浄装置
２ ：ＫＣ１０００相当貯槽
３ ：ＫＣ５００相当貯槽
４ ：洗浄油バッファ槽
５ ：トランス油受槽
６ ：ＴＣＢ分離塔
７ ：ＴＣＢ分離塔還流槽
８ ：第１蒸留塔
９ ：第１蒸留塔還流槽
１０ ：ＴＣＢ分析待槽
１１ ：粗洗浄水分離塔
１２ ：粗洗浄油回収塔
１３ ：粗洗浄油回収槽
２００ ：ライン
２０１ ：返送ライン
３００ ：ライン
４００ ：ライン
４０１ ：ライン
４０２ ：ライン 1: Oil removal cleaning device 2: KC1000 equivalent storage tank 3: KC500 equivalent storage tank 4: Cleaning oil buffer tank 5: Trans oil receiving tank 6: TCB separation tower 7: TCB separation tower recirculation tank 8: 1st distillation tower 9: 1st distillation tower Distillation tank 10: TCB analysis waiting tank 11: Rough cleaning water separation tower 12: Rough cleaning oil recovery tower 13: Rough cleaning oil recovery tank 200: Line 201: Return line 300: Line 400: Line 401: Line 402: Line

Claims (3)

ＰＣＢ汚染機器から抜油されたＰＣＢやＴＣＢを含有する絶縁油を受け入れ、且つ抜油後のＰＣＢ汚染機器を洗浄し、ＰＣＢやＴＣＢを含有する抜油と、ＰＣＢを含有する抜油と、ＴＣＢ、ＰＣＢ、水、洗浄油を含む洗浄廃液とを排出する抜油洗浄装置を備え、
前記洗浄廃液は、洗浄油バッファ槽に送られ、
前記ＰＣＢとＴＣＢを含む抜油は、ＴＣＢ分離塔に送られ、蒸留され、ＴＣＢは留出液中に分離され、ＰＣＢは缶出液中に分離され、
該ＴＣＢ分離塔で留出液に分離されたＴＣＢは、ＴＣＢ分離塔還流槽に送られ、該ＴＣＢ分離塔還流槽に集められたＴＣＢの一部は、所定のＰＣＢ濃度以下になっていたら、前記洗浄油バッファ槽に返送ラインを介して返送され、前記洗浄廃液と混合され、
前記洗浄廃液は、前記洗浄油バッファ槽を介して粗洗浄水分離塔に送られ、水を含む留出液と、ＴＣＢ、ＰＣＢ及び洗浄油を含む缶出液とに、蒸留されて分離され、
該粗洗浄水分離塔の蒸留によって得られたＴＣＢ、ＰＣＢ及び洗浄油を含む缶出液は、粗洗浄油回収塔に送られ、洗浄油を含む留出液と、ＴＣＢ及びＰＣＢとを含む缶出液とに、蒸留して分離され、
前記粗洗浄油回収塔の蒸留によって得られた洗浄油を含む留出液は、粗洗浄油回収槽を介して前記抜油洗浄装置で再利用されることを特徴とするＰＣＢ汚染機器をクリーニングする方法。 Accepts insulating oil containing PCB or TCB degreased from PCB contaminated equipment, cleans the deoiled PCB contaminated equipment, degreased PCB or TCB, degreased containing PCB, TCB, PCB, water Equipped with a degreasing cleaning device that discharges cleaning waste liquid containing cleaning oil,
The cleaning waste liquid is sent to the cleaning oil buffer tank and sent to the cleaning oil buffer tank.
The degreased oil containing the PCB and TCB is sent to a TCB separation column and distilled, the TCB is separated in the distillate, and the PCB is separated in the canned liquid.
The TCB separated into the distillate in the TCB separation column is sent to the TCB separation column reflux tank, and if a part of the TCB collected in the TCB separation column reflux tank is below the predetermined PCB concentration, It is returned to the cleaning oil buffer tank via a return line, mixed with the cleaning waste liquid, and is mixed with the cleaning waste liquid.
The cleaning waste liquid is sent to a rough cleaning water separation tower via the cleaning oil buffer tank, and is distilled and separated into a distillate containing water and a canned liquid containing TCB, PCB and cleaning oil.
The canned liquid containing TCB, PCB and cleaning oil obtained by distillation of the rough washing water separation tower is sent to the rough washing oil recovery tower, and the distillate containing cleaning oil and the can containing TCB and PCB are sent. Distilled and separated into the effluent,
A method for cleaning a PCB-contaminated device , wherein the distillate containing cleaning oil obtained by distillation of the rough cleaning oil recovery tower is reused in the oil removal cleaning device via a rough cleaning oil recovery tank. .. 前記粗洗浄油回収塔の蒸留によって得られたＴＣＢ及びＰＣＢを含む缶出液は、ＰＣＢとＴＣＢを含む抜油と混合されることを特徴とする請求項１記載のＰＣＢ汚染機器をクリーニングする方法。 The method for cleaning a PCB-contaminated device according to claim 1, wherein the canned out liquid containing the TCB and the PCB obtained by the distillation of the rough cleaning oil recovery tower is mixed with the PCB and the degreased oil containing the TCB. 前記ＴＣＢ分離塔において、ＰＣＢを含む缶出液は、第１蒸留塔に送られ、ＴＣＢを含む留出液と、ＰＣＢを含む缶出液に分離し、該缶出液は、無害化処理設備に送り、無害化処理することを特徴とする請求項１又は２記載のＰＣＢ汚染機器をクリーニングする方法。 In the TCB separation column, the canned out liquid containing PCB is sent to the first distillation column and separated into a distillate containing TCB and a canned out liquid containing PCB, and the canned out liquid is detoxified by a detoxification treatment facility. The method for cleaning a PCB-contaminated device according to claim 1 or 2 , characterized in that it is sent to a detoxified treatment.
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JP2005103388A (en) 2003-09-29 2005-04-21 Kobelco Eco-Solutions Co Ltd Method and system for cleaning pcb-contaminated matter
JP2006021165A (en) 2004-07-09 2006-01-26 Kobelco Eco-Solutions Co Ltd Treatment method of car-loaded transformer
JP2008179548A (en) 2007-01-23 2008-08-07 Nippon Steel Engineering Co Ltd Method and apparatus for transferring waste tcb
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