JP2004053508A - System for determining whether object contaminated with hazardous matter is appropriately treated - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for determining whether objects contaminated with hazardous matter are appropriately treated for determining whether the hazardous matter remains in the objects to be treated which have been decontaminated by treating, for example, washing the contaminated objects contaminated with the hazardous matter. <P>SOLUTION: After an object 11 contaminated with the hazardous matter, contaminated with an insulating oil containing the hazardous matter, is treated by a hazardous matter decontamination treating means 12, it is determined whether the object 13 to be treated conforms to residue treatment criteria of the hazardous matter in the system for determining whether the objects contaminated with the hazardous matter are appropriately treated. The system is provided with both a determining tank 15 for dissolving the hazardous matter and the insulating oil remaining in the object 13 to be treated after the completion of the treatment in a determining liquid 14 and an analyzing means 16 for measuring the concentration of the insulating oil in the determining oil 14. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a graduation determination system for harmful substance contaminants, which determines whether or not harmful substances remain in treated products obtained by decontaminating contaminated products contaminated with harmful substances by processing such as washing.
[0002]
[Background Art]
Since PCB (Polychlorinated biphenyl, polychlorinated biphenyl: a general term for chlorinated isomers of biphenyl) has high toxicity, its production and import are prohibited. Although the production of this PCB began in Japan around 1954, the adverse effects on living organisms and the environment became apparent in the wake of the Kanemi Yusho incident, and in 1972 an instruction was issued to stop production and recall (required storage) due to administrative guidance. There was a background.
[0003]
PCB is obtained by substituting 1 to 10 chlorine atoms in a biphenyl skeleton. There are theoretically 209 isomers depending on the number and position of the substituted chlorine, and about 100 or more isomers have been confirmed in commercial PCB products at present. In addition, the physical and chemical properties, in vivo stability, and environmental dynamics of these isomers are diverse, and the current situation is that the chemical analysis of PCBs and the manner of environmental pollution are complicated. Furthermore, PCB is one of the persistent organic pollutants, is hardly decomposed in the environment, is fat-soluble, and has a high bioconcentration rate. Furthermore, it has the property of being semi-volatile and capable of moving through the atmosphere. In addition, it is reported that it remains widely in the environment such as water and living things.
As a result, since PCB is extremely stable in the body, it is accumulated in the body and causes chronic poisoning (skin damage, liver damage, etc.), and carcinogenicity and reproductive / developmental toxicity are recognized.
[0004]
Since PCBs have been widely used as insulating oils for transformers and capacitors, it is necessary to treat PCBs. For this reason, various disassembly methods for detoxifying PCBs have been proposed (see, for example, JP-A-11-253799, JP-A-11-253796, JP-A-2000-126588 and others).
[0005]
Here, the above PCB detoxification apparatus processes only PCB, but the PCB contaminated container or the like from which one PCB is extracted is subjected to a cleaning treatment with a cleaning liquid such as an organic solvent or a surfactant, and the container is rendered harmless. It is trying to make it.
[0006]
However, there is a problem that it is difficult to determine whether the cleaning of the PCB contaminated container has been completed.
[0007]
For example, the wiping test method specifies that the amount of PCB adhered is 0.1 μg / 100 cm ² or less (= 10 μg / m ² or less). However, there is a problem that a large error occurs in such a large area wiping test. is there.
[0008]
Although the official method is defined as a method for measuring the PCB concentration, the measurement requires two or more days including pretreatment, and there is a problem that a quick determination cannot be made.
[0009]
For this reason, when a large number of PCB-contaminated containers are to be continuously processed, a simple and quick cleaning reference method is desired.
[0010]
The present invention has been made in view of the above problems, and has as its object to provide a method for determining the cleaning of a harmful substance-contaminated container that can quickly determine the cleaning of a container or the like contaminated with a harmful substance such as an organic halide such as PCB. And
[0011]
[Means for Solving the Problems]
A first invention for solving the above-mentioned problem is a harmful substance for treating contaminants contaminated by insulating oil containing a harmful substance, and then determining that the treated product meets a harmful substance residual treatment standard. A graduation judgment system for processing contaminants,
A determination tank for dissolving the harmful substances and insulating oil remaining in the processed product after the processing in the determination liquid,
An analysis means for measuring the concentration of insulating oil in the determination liquid is provided.
[0012]
In a second aspect, in the first aspect,
It comprises a judgment means for judging the concentration of harmful substances in the judgment liquid from the analysis result of the analysis means,
The determination means obtains a determination value of a treated product wiping test by obtaining a residual amount of harmful substances per unit area from a measured value of the insulating oil concentration of the determination liquid in the determination tank,
A graduation judging system for harmful substance contaminants is characterized by judging whether or not a passing standard for a processed product wiping test has been reached.
[0013]
In a third aspect, in the first aspect,
It comprises a determination liquid supply means for supplying a determination liquid to the determination tank,
After storing the processed product in the determination tank, a grading determination system for harmful substance contaminants is characterized in that the determination liquid is supplied from the determination liquid supply means to the determination tank and the processed product is immersed in the determination liquid. is there.
[0014]
In a fourth aspect based on the first aspect,
It comprises a determination liquid supply means for supplying a determination liquid to the determination tank,
The graduation determination system for harmful substance contaminants is characterized in that after the determination liquid is supplied from the determination liquid supply means into the determination tank, the processed product is immersed in the determination liquid.
[0015]
In a fifth aspect based on the first aspect,
The harmful substance contaminant treatment graduation determination system is characterized in that the harmful substance contaminant treatment means is one of a cleaning treatment means, a vacuum heating treatment means, and an electrolysis treatment means or a combination thereof.
[0016]
In a sixth aspect based on the first aspect,
A graduation determination system for treating harmful substance contaminants, wherein the measurement of the insulating oil concentration is performed after removing the washing solvent in the insulating oil.
[0017]
According to a seventh aspect, in the first aspect,
The measurement of the insulating oil concentration is in a graduation judgment system for harmful substance contaminants, wherein the means for removing the washing solvent in the insulating oil is a solid phase extracting means or a liquid chromatograph.
[0018]
In an eighth aspect based on the first aspect,
The graduation determination system for treating harmful substance contaminants, wherein the measurement of the insulating oil concentration is performed by an infrared absorption spectrophotometer.
[0019]
The ninth invention is based on the first invention,
The harmful substance is an organic halide, and the determination liquid is n-hexane, isopropyl alcohol or a mixture of isopropyl alcohol and water, trichloroethane, or a paraffinic hydrocarbon. In the processing graduation judgment system.
[0020]
A tenth invention is a ninth invention,
In the graduation determination system for harmful substance contaminants, the organic halide is PCB.
[0021]
According to an eleventh aspect of the present invention, after treating contaminants contaminated by insulating oil containing harmful substances, it is determined that the treated product meets the standards for residual treatment of harmful substances. The method,
Dissolve harmful substances and insulating oil remaining in the treated product after the treatment is completed in the determination solution,
A method for judging graduation of harmful substance contaminants, comprising analyzing the concentration of insulating oil in the judgment liquid.
[0022]
A twelfth invention is the eleventh invention,
From the measured value of the insulating oil concentration of the above determination liquid, determine the residual amount of harmful substances per unit area to obtain the determination value of the treated product wiping test,
A method for judging graduation of harmful substance contaminants is characterized by judging whether or not a pass standard of a processed product wiping test is reached.
[0023]
According to a thirteenth invention, in the eleventh invention,
The method for judging graduation of harmful substance contaminants is characterized in that the treatment of the harmful substance contaminants is any one of cleaning treatment means, vacuum heat treatment means, electrolysis treatment means, or a combination thereof.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the system for judging graduation of harmful substance contaminants according to the present invention will be described below, but the present invention is not limited to these embodiments.
[0025]
[First Embodiment]
FIG. 1 shows a schematic configuration of a graduation determination system for processing harmful substance contaminants.
As shown in FIG. 1, a graduation determination system 10 for processing harmful substance contaminants according to the present embodiment processes harmful substance contaminated products 11 contaminated with insulating oil containing harmful substances by harmful substance decontamination processing means 12. And a graduation judging system for harmful substance contaminants, which judges that the treated product 13 meets the harmful substance residual treatment standard, wherein the toxic substance remaining in the treated product 13 after the treatment is completed. And a determination tank 15 for dissolving the insulating oil in the determination liquid 14, and an analyzing means 16 for measuring the concentration of the insulating oil in the determination liquid 14.
[0026]
Here, the processed product 13 is obtained by processing the harmful substance contaminated product 11 by the processing unit 12. For example, when the harmful substance is PCB, a container or a core / transformer, which is a component material such as a transformer or a capacitor. Examples include objects, iron cores, copper wires, insulators, and fittings.
Here, in the past, in some cases, the transformer and the capacitor were used after removing the PCB and then adding and washing the insulating oil to reduce the PCB concentration. A trace amount (for example, about several ppm to several hundred ppm) of PCB is dissolved.
[0027]
Here, examples of the determination liquid 14 used in the determination tank 15 include n-hexane, isopropyl alcohol, a mixture of isopropyl alcohol and water, trichloroethane, and paraffin hydrocarbon.
[0028]
According to the graduation judgment system for treating harmful substance contaminants, the treated article 13 after treating the harmful substance contaminated article 11 is immersed in the judgment tank 15 to dissolve the harmful substance and insulating oil remaining in the judgment liquid 14. Then, by measuring the concentration of the insulating oil by the analysis means 16, the residual amount can be measured indirectly.
[0029]
Further, a determination means 18 for determining the concentration of the harmful substance in the determination liquid 14 from the analysis result 17 of the analysis means 16 is provided, and the determination means 18 calculates a unit from the measured value of the insulating oil of the determination liquid 14 in the determination tank. The determination value of the processed product wiping test is obtained by obtaining the amount of harmful substances remaining per area, and the judgment (judgment) 19 is made as to whether or not the passing standard of the processed product wiping test is satisfied.
[0030]
As a result, when the processing is properly performed and a certain judgment criterion is reached (graduation), a so-called harmful substance-free product is obtained. On the other hand, if the processing is not properly performed and the predetermined criterion is not reached (failure), the processing is performed again.
[0031]
2 and 3 show steps of analyzing the insulating oil concentration in the analysis means 16.
As shown in FIGS. 2 and 3, the concentration of the insulating oil in the determination liquid 14 from the determination liquid 15 is measured by two concentration analysis steps.
[0032]
The first insulating oil concentration measuring step is to separate the insulating oil and the determination liquid by using solid phase extraction means.
As a solid phase extraction means, Si or a polymer filler having an octadecyl group cross-linked was used as a filler.
As shown in FIG. 2, first, a chlorine-based solvent or a fluorine-based solvent (CF ₄ , CCl ₂ F ₂ , C ₂ Cl ₃ F ₃ , C ₂ Cl ₆ , C ₂ Cl ₂ F _{4) is} supplied to the solid-phase extraction means 100. , _{C 2 Cl} 4 _F 2, etc.) used to adjust (S-11).
Thereafter, air is passed to dry the substrate, and the chlorine-based or fluorine-based solvent is removed (S-12).
Next, warm water (for example, 40 to 60 ° C.) is flowed through the solid-phase extraction means, and is allowed to adapt (S-13).
Next, the determination liquid is diluted with 10 times the amount of hot water (for example, 40 to 60 ° C.) of the determination liquid 14 and then passed through the solid phase extraction means 100, for example, where the determination liquid is an aqueous determination liquid (for example, IPA (isopropyl alcohol)). In the case of (1), the determination liquid is removed, and the insulating oil and PCB are adsorbed on the solid phase extraction layer (S-14).
Thereafter, hot water (for example, 40 to 60 ° C.) 20 times the amount of the determination liquid 14 is passed through to wash (S-15).
Air is passed through the solid-phase extraction means 100 and suction-dried (S-16).
A chlorine-based or fluorine-based solvent is passed through the solid-phase extraction means 100 to elute the insulating oil (S-17).
The concentration of the eluted insulating oil is measured by infrared absorption means (S-18).
[0033]
The concentration of the insulating oil is determined, and then the PCB concentration is determined from the conversion coefficient between the insulating oil and the PCB (1/20000 when the initial PCB concentration is 50 ppm).
[0034]
As shown in FIG. 4, the second insulating oil concentration measuring step uses a chlorine-based or fluorine-based solvent as a mobile phase and performs a liquid chromatography to determine a determination liquid (for example, IPA (isopropyl alcohol) and water, or a hydrocarbon-based solvent). The determination oil is separated from the insulating oil, and the concentration of the insulating oil is determined by an ultraviolet spectrometer (S-20).
When the concentration of the insulating oil cannot be measured by the ultraviolet spectrometer, the concentration of the eluate is measured by the above-mentioned infrared absorbing means (S-21).
[0035]
FIG. 5 is an infrared absorption spectrum diagram of the infrared absorption means.
The wavelength was measured in the range of 2600 to 3200 cm ^-1 (absorption wave number due to CH stretching vibration). The cell used was a CaF ₂ cell of 10 to 100 mm.
[0036]
Here, the determination procedure will be described with reference to FIG.
First, the processed product 13 is moved into the determination tank 15, and thereafter, the determination solution 13 is supplied, and the trace harmful substances attached to the processed product 13 are dissolved in the determination solution 14, and the analyzed After measuring the insulating oil, the residual concentration (X) of the harmful substance is obtained by conversion (S-101).
Based on the calibration curve obtained in advance, the residual amount of harmful substances per unit area is determined from the measured value (X) (S-102), and from this result, the judgment value of the processed product wiping test is determined (S-103). .
From the determined value, it is determined whether or not a passing criterion (graduation) of the processed product wiping test is reached (S-104).
[0037]
Therefore, as shown in FIG. 1, whether or not the processed product 14 is the processed product 20 or the reprocessed product 21 to be processed again is selected 19 based on the passing criteria.
[0038]
At the time of the determination shown in FIG. 1, a determination liquid supply means 22 for supplying a determination liquid to the determination tank 15 is provided, and after the processing product 13 is stored in the determination tank 15, the sealed state is established. The determination liquid 15 may be supplied from the supply unit 22 to the determination tank 15 so that the processed product 13 is immersed in the determination liquid 14.
[0039]
After this determination processing, the determination liquid is drained from the determination tank 15 and dried by the drying unit 23. This drying means may be integrated with the determination tank 15 or may be provided separately.
[0040]
Further, as a method of immersing the processed product 13 in the determination liquid 14, a so-called dip pickling method of immersing the processed product 13 in a determination tank filled with the determination liquid 14 may be used.
[0041]
In addition, when the amount of the harmful substance in the determination liquid 14 has a harmful substance concentration higher than the criterion, the determination process cannot be performed, and the harmful substance concentration in the determination liquid 14 is separately analyzed by the analysis means. The determination is made while confirming that the concentration of the harmful substance in the determination liquid 14 is equal to or less than a predetermined amount.
For example, when taking PCB as an example of a harmful substance, when the graduation criterion is set with the amount of PCB in the determination liquid 14 being 0.3 mg / kg, the amount of PCB in the determination liquid 14 is 0.3 mg / kg or less. In this case, the liquid can be used as it is as the determination liquid again.
[0042]
Further, a concentration adjusting means 24 for adjusting the concentration of the determination liquid 14 is provided. From the analysis result of the analysis means for measuring the concentration in the determination liquid 14, when the harmful substance concentration is equal to or more than a predetermined amount, the concentration of the determination liquid is determined. The density is adjusted.
For example, when PCB is taken as an example of a harmful substance, when the graduation criterion is set at 0.3 mg / kg of PCB in determination liquid 14, the amount of PCB in determination liquid 14 is 0.5 mg / kg or more. In the case of (1), since the determination liquid is disqualified, it is necessary to adjust the determination liquid so that the concentration is not more than a predetermined concentration.
[0043]
The concentration adjusting means 24 includes a determination liquid tank 25 for storing the determination liquid 14, a concentration meter 26 for monitoring the concentration in the determination liquid 14, and a waste liquid tank 27 for storing the determination waste liquid. The adjustment of the determination liquid 14 determined in 15 is performed.
[0044]
Examples of the densitometer 26 include a hydrometer that measures the specific gravity of the determination liquid 14 and a density meter that measures the density of the determination liquid.
[0045]
In addition to performing this simple determination method at all times, for example, in the case of a processed container such as a transformer, a container wiping test by an official method is performed for each predetermined lot, so that all management of the container processing can be performed.
[0046]
The harmful substance is, for example, an organic halide such as PCB, and for cleaning, any of n-hexane, isopropyl alcohol, trichloroethane, and paraffin hydrocarbon can be used as a cleaning liquid.
[0047]
Here, as the determination liquid, n- hexane, isopropyl alcohol (IPA), trichloroethane, paraffin hydrocarbons ( "NS-100" _(aliphatic organic solvent _{C 11)} (trade name): Nikko Petrochemicals Co., Ltd. FIG. 7 shows the results of conversion of the PCB concentration in the solvent and the amount of the PCB by the wiping test when using the above method.
[0048]
As shown in FIG. 7, although there is a difference in solubility depending on the type of the determination liquid, it can be determined that the PCB adhesion amount, which is the standard of the wiping test, is 10 μg / m ² or less.
[0049]
Thus, by confirming that the PCB concentration in the determination tank 15 is, for example, 0.5 mg / kg or less, the graduation criteria are met.
[0050]
[Second embodiment]
FIG. 8 shows a schematic configuration of a graduation determination system for processing harmful substance contaminants.
As shown in FIG. 8, in the graduation determination system for harmful substance contaminants according to the present embodiment, after the harmful substance contaminated product 11 contaminated with harmful substances is processed by the processing unit 12, the processed product 13 becomes harmful. A graduation determination system for harmful substance contaminants that determines that the substance satisfies the residual treatment standards for harmful substances and insulating oil remaining in the processed product 13 after the processing is completed. A determination tank 15 for dissolving, an analysis means 16 for measuring the concentration of the insulating oil in the determination liquid 14, a determination liquid tank 31 interposed in a circulation line for supplying the determination liquid 14 to the determination tank 15, The tank 15 is provided with a loading / unloading means 32 for loading and unloading the processed product 12.
[0051]
The determination tank 15 is a hatch type in which lids 15a and 15b at the shaft end are freely openable and closable, and a determination liquid 14 is supplied therein to immerse the processed product 13.
[0052]
In the above system, the processed product 12 is first moved into the determination tank 15 by the loading / unloading means 32. Next, the judging liquid 14 is supplied from the judging liquid tank 31, and the processed product 12 is immersed. After soaking for a predetermined time, the remaining harmful substances and insulating oil are dissolved in the determination liquid 14.
Thereafter, the determination liquid 14 is collected in the determination liquid tank 31. At the same time, a part of the determination liquid 14 is introduced into the analysis means 16, and the concentration of the harmful substance in the determination liquid is determined as described above.
As a result of the analysis, the PCB concentration is converted and a determination is made.
The result of this determination is reported to the central management room 90 online.
[0053]
Here, the specific gravity or the density of the determination liquid 14 is measured by the concentration meter 26 to confirm that the determination liquid 14 has a predetermined concentration.
[0054]
From the measurement result of the densitometer 26, when the concentration is equal to or lower than the predetermined concentration, a new determination liquid is supplied from the determination liquid supply tank 22.
[0055]
Further, the determination tank 15 is provided with a heater 41 as a heating means, and performs drying of the processed product after completion of the determination. The determination liquid vaporized by drying is recovered by a solvent recovery device 43 having a cooler 42, and the high concentration determination liquid 14 is returned to the determination liquid tank 31.
In the drying, the determination liquid 14 is evaporated by closing the container and reducing the pressure to a value not higher than the vapor pressure. The vapor is sucked and diffused by a suction pump (not shown), so that the drying efficiency is improved even if the members overlap.
[0056]
Further, in order to improve the drying efficiency, a heater 44 for heating the determination liquid 14 is provided in the determination liquid circulation line 45.
[0057]
The exhaust gas 46 from the recovery device 43 is discharged to the outside after removing harmful substances by a filter means 47 such as activated carbon.
[0058]
Further, N ₂ gas is introduced into the determination liquid tank 31 from the N ₂ supply facility 33 to take explosion-proof measures.
[0059]
When the concentration of the harmful substance in the determination liquid 14 in the determination liquid tank 31 is equal to or higher than a predetermined reference, the harmful substance does not function as the determination liquid and is discarded to the waste liquid tank 27. It should be noted that the distillation is performed by the distillation means 34 and the distilled product is supplied to the determination liquid supply tank 35.
[0060]
Further, a pure water tank 35 for diluting the determination liquid 14 to a predetermined concentration or less is provided.
For example, when an alcohol-based solvent is used as the determination liquid, it is diluted with water to make it easier to handle, for example, the Fire Service Law.
[0061]
FIG. 9 shows an outline of a PCB decomposition processing system.
As shown in FIG. 9, the PCB detoxification processing system is a harmful substance processing system for detoxifying a processing target on which PCB, which is a harmful substance, is attached, contained, or stored. One or both of the separating means 1004 for separating the harmful substance 1002 from the container 1003 for storing the substance (for example, PCB) 1002 and the disassembling means 1005 for disassembling the components 1001a, b,. A pretreatment means 1006, a core separation means 1007 for separating a core 1001a, which is a constituent material of an object processed in the pretreatment means 1006, into a coil 1001b and an iron core 1001c, and the separated coil 1001b Coil separating means 1008 for separating wire 1001d and paper / tree 1001e; Cleaning means 1011 for cleaning the iron core 1001c separated by 1008, the metal container (container main body and lid) 1003 separated by dismantling means 1005, and the copper wire 1001d separated by coil separating means 1008 with a cleaning liquid 1010; A slurrying means 1015 for converting the paper / tree 1001e separated by the coil separating means 1008 into a slurry; a washing waste liquid 1012 after the washing; a harmful substance 1002 and a slurry 1014 separated by the pretreatment means; Harmful substance decomposition treatment means 1013 for decomposing harmful substances, and a harmful substance contaminant treatment graduation determination system 10 for quickly determining the residual amount of harmful substance adhered to the container 1002 and the like washed by the washing means 1011. It becomes.
[0062]
Here, as the harmful substance to be detoxified in the present invention, besides PCB, for example, vinyl chloride sheet, hazardous waste paint, waste fuel, toxic chemical, waste resin, untreated explosive, etc. can be mentioned. It is not limited to these as long as they are harmful substances caused by contamination.
[0063]
Examples of the object to be treated in the present invention include, but are not limited to, transformers and capacitors using PCB as an insulating oil, and storage containers storing paints that are harmful substances. Not something.
[0064]
Also, in the ballast for fluorescent lamps, PCB has been used conventionally, so it is necessary to perform detoxification treatment. In this case, since the capacity is small, it is necessary to directly feed into the separation means 1009 without pretreatment. Can be detoxified.
[0065]
When the harmful substance is a liquid or the like, the harmful substance is detoxified by directly charging the harmful substance decomposition processing means 1013, and the container in which the harmful substance is stored can be processed by the detoxification processing of the constituent materials.
The configuration of the harmful substance processing means 1013 is shown in FIG.
As shown in FIG. 10, the hydrothermal oxidative decomposition device 120 includes a cylindrical primary reactor 122 and treatment liquids of oil (or organic solvent), PCB, water (H ₂ O), and sodium hydroxide (NaOH). A pressurizing pump 124 for pressurizing 123a to 123d, a heat exchanger 125 for preheating the water, a secondary reactor 126 having a pipe wound spirally, a cooler 127 and a pressure reducing valve 128. It becomes. Further, a gas-liquid separator 129 and an activated carbon tank 130 are disposed downstream of the pressure reducing valve 127, and the exhaust gas (CO ₂ ) 131 is discharged from the chimney 132 to the outside, and the waste water (H ₂ O, NaCl) 133 is discharged. It is stored in the discharge tank 134 and is separately drained as needed.
[0066]
The processing liquid 123 (oil or organic solvent), PCB, H ₂ O, and NaOH processing liquids 123 a to 123 d are introduced from processing liquid tanks 135 a to 135 d via pipes 136 a to 136 d and an ejector 137, respectively. . An oxidizing agent such as oxygen (O ₂ ) is supplied by a high-pressure oxygen supply facility 138, and a supply pipe 139 is directly connected to the primary reactor 122. The reason why the oil (or the organic solvent) is added is to promote the decomposition reaction of the PCB having a particularly high concentration and to raise the reaction temperature to the optimum temperature when the decomposition apparatus 120 is started. Alternatively, the above-mentioned PCB, H ₂ O, and NaOH may be mixed as a processing liquid and then charged into the primary reactor 122.
[0067]
In the above apparatus, the pressure inside the primary reactor 122 is increased to 26 MPa by pressurization by the pressurizing pump 124. Further, the heat exchanger 125 preheats H ₂ O to about 300 ° C. Further, oxygen is spouted into the primary reactor 122, and the temperature rises to 380 ° C to 400 ° C due to the internal reaction heat. By this stage, the PCB has undergone a dechlorination reaction and an oxidative decomposition reaction, and has been decomposed into NaCl, CO ₂ and H ₂ O. Next, in the cooler 127, the fluid from the secondary reactor 126 is cooled to about 100 ° C., and the pressure is reduced to the atmospheric pressure by the pressure reducing valve 128 in the subsequent stage. Then, CO ₂ and water vapor and the processing liquid are separated by the gas-liquid separator 129, and the CO ₂ and water vapor pass through the activated carbon tank 130 and are discharged into the environment.
[0068]
By treating a PCB-containing oil (for example, an insulating oil such as a transformer or a capacitor) or the like using such a processing device 120, the PCB is dechlorinated and dechlorinated such as biphenyl ((C ₆ H ₅ ) ₂ ). The biphenyl is completely rendered harmless to CO ₂ , H ₂ O and the like by the action of an oxidizing agent and the like.
[0069]
In the above system, the cleaning effect of the cleaning means 1011 can be quickly determined, so that efficient container cleaning processing can be performed, and the waiting time for the determination of the container cleaning processing can be reduced, so that it is not necessary to secure a storage space. It becomes.
[0070]
Further, since the time required for the analysis can be reduced and the operability can be simplified, it is possible to make a determination without any individual difference in the container cleaning determination.
[0071]
In addition, it is possible to determine the processing of the containers for several hundred units / day, and it is possible to reduce the environmental load of the temporarily stored washing waste liquid for waiting for the determination.
[0072]
【The invention's effect】
As described above, according to the present invention, after treating harmful substance contaminants contaminated with harmful substances, it is determined that the treated product meets the harmful substance residual treatment standards. A graduation determination system for processing a substance, a determination tank for dissolving harmful substances and insulating oil remaining in the processed product after the processing is completed, and an analysis for measuring the concentration of the insulating oil in the determination liquid. Therefore, it is possible to quickly determine the processing of a container or the like contaminated with a harmful substance such as an organic halide such as PCB, for example.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a graduation determination system according to a first embodiment.
FIG. 2 is a process diagram of a first measurement of an insulating oil concentration.
FIG. 3 is a process chart of the first measurement of the insulating oil concentration.
FIG. 4 is a process chart of a second measurement of the insulating oil concentration.
FIG. 5 is an infrared absorption spectrum diagram.
FIG. 6 is a flowchart of a determination procedure according to the first embodiment.
FIG. 7 is a diagram showing a relationship between a PCB concentration in a solvent and a wiping test.
FIG. 8 is a configuration diagram of a graduation determination system according to a second embodiment.
FIG. 9 is a schematic diagram of a PCB decomposition processing system according to a second embodiment.
FIG. 10 is a schematic view of a hydrothermal oxidative decomposition treatment apparatus.
[Explanation of symbols]
Reference Signs List 10 Graduation judgment system for treatment of harmful substance contaminants 11 Hazardous substance contaminated product 12 Hazardous substance decontamination treatment means 13 Treated product 14 Judgment liquid 15 Judgment tank 16 Analysis means

Claims (13)

After treating contaminants contaminated by insulating oil containing harmful substances, a graduation determination system for harmful substance contaminants that determines that the treated product meets the harmful substance residual treatment standards,
A judgment tank for dissolving the harmful substances and insulating oil remaining in the processed product after the treatment in the judgment liquid,
An analysis means for measuring the concentration of the insulating oil in the determination liquid. A graduation determination system for harmful substance contaminants, characterized by comprising: In claim 1,
It comprises a judgment means for judging the concentration of harmful substances in the judgment liquid from the analysis result of the analysis means,
The determination means determines a determination value of a treated product wiping test by determining a residual amount of harmful substances per unit area from a measured value of the insulating oil concentration of the determination liquid in the determination tank,
A graduation determination system for harmful substance contaminants, which determines whether or not a passing standard for a processed product wiping test has been reached. In claim 1,
It comprises a determination liquid supply means for supplying a determination liquid to the determination tank,
A graduation determination system for harmful substance contaminants, characterized in that after storing the processed product in the determination tank, the determination liquid is supplied from the determination liquid supply means to the determination tank and the processed product is immersed in the determination liquid. In claim 1,
It comprises a determination liquid supply means for supplying a determination liquid to the determination tank,
A graduation judging system for harmful substance contaminants, characterized in that after the judging liquid is supplied from the judging liquid supply means into the judging tank, the processed product is immersed in the judging liquid. In claim 1,
The harmful substance contaminant processing graduation determination system, wherein the harmful substance contaminant processing means is any one of a cleaning processing means, a vacuum heating processing means, and an electrolysis processing means, or a combination thereof. In claim 1,
A graduation determination system for harmful substance contaminants, wherein the measurement of the insulating oil concentration is performed after removing a washing solvent in the insulating oil. In claim 1,
A system for determining the concentration of insulating oil, wherein the means for removing the washing solvent in the insulating oil is a solid phase extracting means or a liquid chromatograph. In claim 1,
A graduation determination system for harmful substance contaminants, wherein the measurement of the insulating oil concentration is performed by an infrared absorption spectrophotometer. In claim 1,
The harmful substance is an organic halide, and the determination liquid is n-hexane, isopropyl alcohol or a mixture of isopropyl alcohol and water, trichloroethane, or a paraffinic hydrocarbon. Processing graduation judgment system. In claim 9,
A graduation determination system for treating harmful substance contaminants, wherein the organic halide is PCB. After treating contaminants contaminated by insulating oil containing harmful substances, a graduation determination method for harmful substance contaminants that determines that the treated product meets the harmful substance residual treatment standards,
Dissolve harmful substances and insulating oil remaining in the treated product after the treatment is completed in the determination solution,
A method for judging graduation of harmful substance contaminants, comprising analyzing the concentration of insulating oil in the judging liquid. In claim 11,
From the measured value of the insulating oil concentration of the determination liquid, determine the residual amount of harmful substances per unit area to obtain the determination value of the treated product wiping test,
A method for judging graduation of harmful substance contaminants, which comprises judging whether or not a passing standard for a processed product wiping test has been reached. In claim 11,
A method for judging graduation of harmful substance contaminants, wherein the treatment of the harmful substance contaminants is any one of cleaning treatment means, vacuum heating treatment means, and electrolysis treatment means or a combination thereof.

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