JP3643890B2 - PCB recovery method from ballast containing PCB - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for recovering PCB from a ballast containing PCB.
[0002]
[Prior art]
PCB has characteristics such as chemical stability, heat resistance, and high insulation. Utilizing these characteristics, electrical insulation oil, pressure sensitive paper, machine oil, plasticizer for electrical equipment such as transformers and capacitors are used. And has been used for paints and the like. However, the actual situation of environmental pollution became clear as a result of the 1968 Kanemi oil symptom, and PCBs were prohibited from being used for manufacturing, importing and open applications by 1974. Furthermore, in 1992, waste PCBs, waste oil containing PCBs and PCB contaminants were designated as specially managed industrial wastes based on the Waste Disposal Law and required to be stored at business establishments. As a result, a considerable number of transformers are currently stored in offices.
[0003]
Large transformers and the like are attracting attention due to the large amount of PCBs, and many proposals have been made for PCB recovery methods.
[0004]
The present applicant has also proposed (see Patent Document 1).
[0005]
The above proposal is shown in FIGS.
[0006]
In this figure, the building 1 has a dismantling yard 2, an iron core 3, a case 4, a stage 5a of a lid 5, 3a, 4a, 5a and the stage 3a, 4a, 5a, and a roller conveyor 3b, 4b, 5b for traveling. Housing part. The exhaust 10 of the building 1 is collected to prevent the outside air including PCB from escaping to the outside.
[0007]
The conveyors 3b, 4b and 5b are equipped with nozzles that can be used to spray the jets over a wide range without spraying. Low pressure hot water washing booths 3c, 4c and 5c (3 to 5 minutes) Followed by hot water rinse booths 3e, 4e, 5e, and in the illustrated example, drying booths 3f, 4f, 5f and an inspection booth comprising an n-hexane tank 3g, 4g and 5g are added to measure the amount of PCB to be transferred to know the degree of cleaning.
[0008]
In each booth, the exhausts 11, 12, 13, 14, and 15 are collected as in the building 1 described above.
[0009]
The last building 6 is a stock yard 7.
[0010]
In the figure, 8 is an overhead traveling crane, and 9 is a hoist crane.
[0011]
The above-mentioned low pressure (over-strong impact causes PCB scattering) hot water cleaning booth, ultrasonic cleaning booth, hot water rinsing booth, etc. are designed to correspond to the respective processed objects.
[0012]
Consideration should also be given to changing the previous process so that it will be subjected again to the previous process that is deemed necessary.
[0013]
After the hot water rinsing booth 3e having finished the outer surface cleaning, the laminated iron core 3 is moved to an off-line decomposition / separation yard 16 where it is separated into paper, wood, and fiber, and the entire surface is exposed and exposed to iron. The former is sent to the supercritical extraction device 17, and the latter is returned to the ultrasonic cleaning booth 3d to clean the portion that is concealed and cannot receive the cleaning action.
[0014]
The waste water in which oil and water are not separated from the low-pressure hot water washing booths 3c, 4c and 5c and the hot water rinsing booths 3e, 4e and 5e are all sent to the oil / water separation and recovery device 18 shown in FIG.
[0015]
That is, the wastewater pooled in the drainage bit 18a is pumped from the upper oil and water to the separation tank 18c in which the float pump 18b continues the tank through the siphon 18d.
[0016]
The separation tank 18c is preliminarily filled with slightly cooled water, and the oil content in the waste water put into the separation tank 18c is cooled and solidified and clearly floats and separates (PCB concentration is low and specific gravity is light). The oil skimmer 18e adheres using the viscosity of the oil and is scraped off by the skimmer 18e to be recovered in the recovery tank 18f.
[0017]
The oil in the recovery tank 18 f is collected in the oil storage tank 19. The water from the final siphon 18d of the separation tank 18c contains neither emulsion nor solid oil (PCB concentration is 0.0005 ppm or less), and is used for reuse.
[0018]
In the ultrasonic cleaning booths 3d, 4d, and 5d, a plant-based cleaning agent is selected as the cleaning agent, and this precise cleaning achieves complete degreasing cleaning in about 30 minutes.
[0019]
In general, the cleaning liquid is replaced at a liquid oil concentration of about 0.5%.
[0020]
As a specific example of the plant-based cleaning agent, there is a product manufactured by S.N.E Research Institute, Ltd. under the trade name ion cleaning agent SNE-GF88. The ingredients are as follows.
Fatty acid diethanolamide (coconut oil) …… 12%
Fatty acid methyl ethoxylate (plant type) 5%
Bark enzyme extract …………………………… 5%
Corn oil component …………………………………… 5%
Kiraya extract ………………………………… 0.3%
Seaweed ingredient ………………………………………… 5%
Yuccafoam extract …………………… 0.3%
Distilled water …………………………………………… 18%
Natural mineral ion water …………………… 49.4%
PH ……………………………………………… 9.3%
Hazard testing is as follows.
Acute toxicity by Himedaka 48 hours LC50 value is 570 mg / l
Acute oral toxicity in mice Primary skin irritation by rabbits of 20 ml / kg or more When applied to the skin of 3 rabbits for 4 hours, erythema 1 or 2 that is mild to clear and intact in all cases 1 hour after removal of the test article Spots were observed, but all cases disappeared 24 hours after removal.
[0021]
Waste water from the ultrasonic cleaning booths 3d, 4d, and 5d is sent to the oil removing device 20 shown in FIG.
[0022]
The oil removing device 20 includes a hopper 20c for charging a powdery flocculant A mainly composed of an extract extracted from plants such as seaweed that can be eaten in a stirring tank 20b having a stirring device 20a and a cationic food additive. Equipped with a liquid level confirmation tank 20d for feeding the main liquid coagulant B (the amount of A used is 1% and B is about 0.3% of the treated wastewater). A back filter 20f is arranged through a filtration pump 20e. As said A and B, Westec Co., Ltd. was the manufacturer, and Shindo Co., Ltd. was the vendor NBP-A and BC9-B (two sets are generic names).
[0023]
In the figure, 20g is a B liquid tank, 20h is a suction pump, 20i is a drain receiver, and this water is reused.
[0024]
The floc 21 obtained by the back filter 20f is sent to the supercritical extraction device 17 to extract PCB, and becomes a harmless solid consisting of the components of the flocculant A and the coagulant B.
[0025]
As a result of analysis by the above means, the residual oil content per 100 g of the member was 4 mg by n-hexane extraction-gravimetry. This is a measurement of oil content under fairly strict conditions by placing a sample in 200 ml of n-hexane and performing ultrasonic cleaning for 40 minutes. Also, this value is clear of the material sampling test method (reference value 0.01 mg PCB / kg or less), and also in the wiping test method, the residual oil content is 1 mg and clears 0.1 mg PCB / 100 cm ² or less.
[0026]
However, a fluorescent ballast capacitor is too small compared to a transformer (large cigarette case), so there is no suggestion for some reason.
[0027]
However, as long as PCB is enclosed, there is no exception, and the enforcement of Article 65 “Special Measures Law on Promotion of Proper Treatment of Polychlorinated Biphenyl Waste” makes storage of PCB waste more stringent. On the other hand, storage in a ballast has a problem in storage space due to the size, weight, etc. of the ballast, and it has become necessary to take out and store a capacitor containing PCB from the ballast.
[0028]
Unlike the above-described transformer, the capacitor PCB has a high concentration of almost 100% and a specific gravity of 1.3 to 1.6, which is quite heavy. The interior is made of paper, aluminum foil, vinyl film, fiber, and the like.
[0029]
The following shows how a major company deals with this.
“When disassembling the ballast (removing the PCB-containing capacitor), follow the procedure below.
1. When removing the capacitor from the ballast, be careful not to break the capacitor container, damage it, or allow PCB oil to flow out.
2. Please be careful about the ventilation of the work place. If ventilation is inadequate, consider preparing a protective mask.
3. When working, use protective equipment such as rubber gloves and protective glasses so that PCB oil does not come into direct contact with the human body.
4). Please carry out the work on a blue sheet. Even if PCB oil leaks, please do not leak to the outside.
5. In the unlikely event that PCB oil spills, immediately collect the oil and wipe it off with sawdust and waste. Sawdust, waste, gloves, etc. must be stored as PCB contaminants.
6). The work should be done quickly. After the work is completed, capacitors and contaminants should be immediately placed in a sealed container and sealed, and the opening time should be as short as possible.
[0030]
Prepare the following protective equipment to protect the environment, human body, etc. when preparing the protective equipment.
(1) Environmental protection: Blue sheets, waste, sawdust, plastic bags, etc. (2) Human body protection: Rubber gloves, protective glasses, protective mask, soap, boric acid water, etc. (3) Other protective equipment required for the work environment Please prepare. "
With the above preparation, the procedure under the structure of a representative ballast is instructed in FIG.
“Disassembly method The ballast is composed of a coil part (winding part), a capacitor and a main body filled with pitch and a bottom plate part.
First, separate the main body and bottom plate.
Remove the end plate on both sides of the ballast body (L-shaped metal fitting spot-welded to the main body case) and the caulking one side of the bottom plate, 4 places in total, using a punch, etc. Open the gap with a flathead screwdriver, etc., and separate the main body and the bottom plate.
(Depending on the model, some nails are bent from the bottom plate. Raise the nails.)
Turn the body over. The capacitor is an aluminum container. The part of the pitch that looks aluminum.
Next, remove the capacitor from the body.
Remove the filled pitch from the main body by using a method such as chipping, and take out the capacitor.
Disconnect the capacitor leads.
Remove the capacitor from the main unit and store it in a storage container.
Dispose of the remaining main body and bottom plate as industrial waste.
Finish with overtime processing. "
As a further note,
“If the capacitor is damaged and the insulating oil containing PCB leaks out, wipe it off with a cloth. The wiped cloth should be stored as PCB contaminants.
If PCB adheres to your body, take the following first aid measures and consult a doctor.
1) In case of skin contact Take off clothes contaminated with PCB immediately and wash with water and soapy water (do not use strong alkaline soap).
2) If it enters the mouth, immediately exhale and repeat gargle with water.
3) If it gets into your eyes, immediately wash your eyes with a large amount of washing water for at least 15 minutes, and then wash your eyes with 3% boric acid.
4) If you feel bad after inhaling steam, rest in fresh air.
Take the above first-aid measures, promptly consult a doctor and follow the instructions. "
This is the current situation.
[0031]
[Patent Document 1]
JP 2001-219153 A (5th and 6th pages, FIGS. 1 to 3)
[Problems to be solved by the invention]
As is clear from the above, regarding the condenser for a fluorescent lamp ballast, the actual situation is that the PCB is not recovered but the capacitor is stored.
[0032]
This means that no matter how large a transformer is processed, the pollution will not stop forever due to sloppy PCB loss or leakage in a fluorescent light ballast that may be more than the large transformer. Become.
[0033]
Further, the response of a large company already described is completely manual, and is inefficient and dangerous work, which is not preferable.
[0034]
Moreover, although the volume is small in appearance, as described above, the fact that the concentration is almost 100%, in fact, means that the complete processing should be urgently required for this small capacitor.
[0035]
The present invention has been made in view of the above circumstances, and its purpose is to recover the PCB from the ballast in the same manner as the above-mentioned proposal for recovery from the transformer of the present inventor. It is to provide a means with excellent properties.
[0036]
[Means for Solving the Problems]
In order to achieve the above object, the method of recovering PCB from the ballast containing PCB according to the present invention mechanizes the recovery of the capacitor from the ballast and the recovery of the PCB from the capacitor. It was established by making a change due to the difference in PCB concentration, and the slits were formed by cutting only the epidermis using a cutting machine such as a hand saw at the top center of the top of the rectangular box fluorescent lamp stabilizer. Spread the ballast to the slit of the workpiece on the rising table and replace it with a stripper that acts as a claw to spread the slit and expose the internal pitch, remove it with a chisel of the pitch, and then remove the capacitor Take out the capacitor and place a rotating chuck on the side of the front end of the horizontal cylinder frame and attach a cutter that moves forward and backward to the chuck. Then, this work cutting part is replaced with a condenser case cutting-dedicated device provided with the horizontal cylinder machine frame turning mechanism that can turn downward, and the capacitor lid is chucked to leak the PCB downward. In a receiving mechanism in which a two-piece cutting is performed in a state where the receiving container is directed completely 90 degrees downward, dropped by releasing the chuck, and a bucket is arranged in a water-filled receiving container disposed below, Receiving PCB and cutting capacitor case, and using leaked PCB, the high specific gravity is used to recover the most part from the storage part via the ramp attached to the bottom of the water-filled container, and the condenser case accommodated in the bucket As for, low pressure hot water cleaning consisting of hot water cleaning of nozzles in which PCB does not become turbid in water, then cleaning in which PCB is hardly dissolved in the cleaning liquid PCB is removed by ultrasonic cleaning and hot water rinsing finish cleaning, and then transferred to an off-line separation and sorting yard and separated into paper, aluminum foil, vinyl film, fiber and metal materials. Is placed before the ultrasonic cleaning on-line, and subjected to ultrasonic cleaning and hot water rinsing finish cleaning again to remove all layers including the inside of the laminate, and from the low pressure hot water cleaning and hot water rinsing finishing cleaning. For PCB recovery, sedimentation is recovered from the bottom of each washing tank, and for wastewater in which a small amount of PCB from the ultrasonic cleaning is dissolved, an extract extracted from plants such as seaweed that can be eaten in a stirring tank. Flocculate PCB by adding flocculant mainly composed of cation and coagulant mainly composed of cationic food additives, collect and filter, and recycle clean water. The paper, aluminum foil, vinyl film, fiber and the floc are completely extracted and separated from the PCB by a supercritical extraction device. This is performed under exhaust recovery in a closed space.
[0037]
[Action]
The series of processes of ballast incision, condenser removal, and condenser cutting are mechanized, and the recovery of the PCB that has been taken out and the PCB that has adhered to the equipment is compatible with the difference in PCB concentration using the perfect pollution-free treatment established by the transformer. Under such changes, the PCB processing of the condenser of the ballast can be performed with high efficiency and safety.
[0038]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0039]
FIG. 2 shows a general-purpose type in which a floor-mounted hand saw 22 is mounted on a table 23 and lifted and lowered by a handle 25 with a pivot point 24 as a fulcrum to allow a saw blade 26 to act on a workpiece.
[0040]
Using this, the ballast W may be placed on the lift 27 and refilled by half to form a slit at the longitudinal center of the top surface of the top plate.
[0041]
The ballast W having a slit formed at the center of the top plate is developed by a stripper 28 shown in FIGS.
[0042]
That is, the table 30 whose level is adjusted by the table vertical handle 29 is moved up and down by the lower cylinder 31. A claw driving arm 33 is disposed at the lower end of the upper cylinder 32 and opens and closes the parallel opposing claws 34 and 34.
[0043]
If the ballast W is placed on the table 30 and the claws 34 and 34 are set in the slits on the upper surface of the ballast and the claw 34 and 34 are opened while the table 30 is lifted, The internal pitch of the ballast is exposed.
[0044]
The ballast W is taken out, the pitch is cut off, and the condenser 42 is taken out.
[0045]
The capacitor 42 is replaced by a dedicated capacitor cutting device 35 shown in FIGS.
[0046]
In other words, this has a work chuck 37 whose gripping force is adjusted by a spring and hydraulic pressure that rotate on the front side surface of the horizontal cylinder frame 36 that is capable of rolling, and is advanced and retracted from the side toward the chuck 37. The cutter 38 has a cylinder-controlled cutter 38. The cutter 38 advances to the chucked and rotating workpiece and cuts the entire circumference with one rotation.
[0047]
A revolving cylinder 39 is linked to the horizontal cylinder frame 36 so that the crank can be rotated, that is, the cutting portion of the chuck 37 and the cutter 38 can be rotated 90 degrees downward.
[0048]
The cutting in the 90 ° downward posture is preferable because it automatically collects the PCB liquid contained in the container in the water-filled container 40 below.
[0049]
Note that a bucket 41 for accommodating a condenser is accommodated in the water filled container 40.
[0050]
8a and 8b show the configurations before and after the capacitor 42 is cut.
[0051]
As is apparent from FIG. b, the condenser 42 divided from the lid portion does not separate the internal cord 43 because the lid portion connects the trunk portion.
[0052]
In the subsequent steps, one or more of the stages 3a, 4a, and 5a of the iron core 3, the case 4, and the lid 5 of Japanese Patent Application Laid-Open No. 2001-219153 of the applicant described above are provided to the bucket 41 that accommodates the condenser 42. It is established by that.
[0053]
However, the special situation that the PCB of the capacitor is almost 100% and the specific gravity is 1.3 to 1.6 is not required to be treated in the same way as the transformer in which the PCB is diluted. The recovery of the PCB to be separated involves a partial change or a partial omission of the process described in JP-A-2001-219153.
[0054]
That is, the conveyors 3b, 4b, and 5b are equipped with nozzles of a type in which the jet jets are spread over a wide range in order without being atomized, and the low-pressure hot water washing booths 3c, 4c, and 5c (3 to 5 minutes) and then the washing of the plant system The ultrasonic cleaning booths 3d, 4d and 5d using the agent are further followed by hot water rinsing booths 3e, 4e and 5e, and in the illustrated example, the drying booths 3f, 4f and 5f and an inspection booth (n- (Measure the amount of PCB transferred to hexane to know the degree of cleaning) 3g, 4g, 5g are added, but the ultrasonic cleaning booths 3d, 4d, 5d using the above-mentioned plant-based cleaning agents are emulsified However, since the PCB of the capacitor has a high concentration, it is more reasonable to separate it from water, so that the PCB hardly dissolves in the cleaning liquid. Stick manufactured by cleaning agent (trade name: extract) and those of using a cleaning agent such as.
[0055]
Therefore, most of the PCB here is settled and recovered, and only a very small amount of PCB is dissolved in the liquid.
[0056]
After the hot water rinsing booth 3e is completed, it is transferred to an off-line disassembly / separation yard 16 where it is separated into paper, aluminum foil, vinyl film, and iron material that has been disassembled and exposed to the entire surface, the former being a supercritical extraction device 17 The latter returns to the ultrasonic cleaning booth 3d to clean the portion that is concealed and cannot receive the cleaning action.
[0057]
PCB recovery from the low-pressure hot water washing booths 3c, 4c, 5c and the hot water rinsing booths 3e, 4e, 5e is performed by sedimentation in the same manner as the ultrasonic washing booths 3d, 4d, 5d.
[0058]
A small amount of PCB-dissolved waste water from the ultrasonic cleaning booths 3d, 4d, and 5d is sent to the oil removing device 20 shown in FIG. 11 (the oil-water separation and recovery device 18 in FIG. 10 is omitted).
[0059]
The oil removing device 20 includes a hopper 20c for charging a powdery flocculant A mainly composed of an extract extracted from plants such as seaweed that can be eaten in a stirring tank 20b having a stirring device 20a and a cationic food additive. Equipped with a liquid level confirmation tank 20d for feeding the main liquid coagulant B (the amount of A used is 1% and B is about 0.3% of the treated wastewater). A back filter 20f is arranged through a filtration pump 20e. As said A and B, Westec Co., Ltd. was the manufacturer, and Shindo Co., Ltd. was the vendor NBP-A and BC9-B (two sets are generic names).
[0060]
In the figure, 20g is a B liquid tank, 20h is a suction pump, 20i is a drain receiver, and this water is reused.
[0061]
The floc 21 obtained by the back filter 20f is sent to the supercritical extraction device 17 to extract PCB, and becomes a harmless solid consisting of the components of the flocculant A and the coagulant B.
[0062]
As a result of analysis by the above means, the residual oil content per 100 g of the member was 4 mg by n-hexane extraction-gravimetry. This is a measurement of oil content under fairly strict conditions by placing a sample in 200 ml of n-hexane and performing ultrasonic cleaning for 40 minutes. Also, this value is clear of the material sampling test method (reference value 0.01 mg PCB / kg or less), and also in the wiping test method, the residual oil content is 1 mg and clears 0.1 mg PCB / 100 cm ² or less.
[0063]
In the PCB of the capacitor, as described above, since the amount of dissolution is very small, the burden is extremely small compared to the transformer, and the burden on the supercritical extraction device 17 is reduced, resulting in low cost.
[0064]
【The invention's effect】
As described above, according to the present invention, the PCB of the ballast condenser can be recovered with high efficiency and completely without providing the PCB recovery means at present, and the contribution to this field is very high.
[Brief description of the drawings]
FIG. 1 is a development view showing a ballast structure.
FIG. 2 is a front view of a hand saw used in the present invention.
FIG. 3 is a side view of a stripper used in the present invention.
FIG. 4 is a front view of a stripper used in the present invention.
FIG. 5 is a left side view of a dedicated condenser cutting device used in the present invention.
FIG. 6 is a front view of the same.
FIG. 7 is a right side view of the same.
FIGS. 8a and 8b are overall perspective views of a ballast capacitor before and after cutting. FIG.
FIG. 9 is an explanatory diagram of a cleaning process for a transformer used in the present invention.
FIG. 10 is an explanatory view of a separation tank for a transformer used in the present invention.
FIG. 11 is an explanatory view of a stirring tank for a transformer used in the present invention.
[Explanation of symbols]
1; Building 2; Demolition Yard 3; Iron Core 3a; Stage 3b; Roller Conveyor 3c; Low Pressure Hot Water Washing Booth 3d; Ultrasonic Washing Booth 3e; Hot Water Rinse Booth 3f; Drying Booth 3g; Inspection Booth 4; Case 4a; Roller conveyor 4c; Low pressure hot water washing booth 4d; Ultrasonic washing booth 4e; Hot water rinse booth 4f; Drying booth 4g; Inspection booth 5; Lid 5a; Stage 5b; 5e; Hot water rinse booth 5f; Drying booth 5g; Inspection booth 6; Building 7; Stockyard 8; Overhead crane 9; Hoist crane 10, 11, 12, 13, 14, 15; Exhaust 16; Supercritical extraction device 18; oil-water separation and recovery Drainage bit 18b; Float pump 18c; Separation tank 18d; Siphon 18e; Oil skimmer 18f; Recovery tank 19; Oil storage tank 20; 20e; pump 20f; back filter 20g; B liquid tank 20h; suction pump 20i; drain 21; flock 22; hand saw 23; base 24; pivot point 25; 30; Table 31; Lower cylinder 32; Upper cylinder 33; Claw drive arm 34; Claw 35; Condenser cutting dedicated device 36; Horizontal cylinder machine frame 37; Work chuck 38; Cutter 39; Swivel cylinder 40; Container 41; bucket 42; a condenser 43; Code W; ballasts

Claims (1)

Using a cutting machine such as a hand saw, a slit is formed at the top center of the top surface of the rectangular box fluorescent lamp ballast using a cutting machine such as a hand saw, and the ballast is pushed to the work slit on the rising table. The stripper is replaced with a stripper that causes the claw to act, and the slit is spread and the internal pitch is exposed. After removing with a chip of the pitch, the condenser is taken out, and the condenser is rotated to the side of the front end of the horizontal cylinder frame. A condenser case cutting dedicated device comprising a horizontal cylinder frame rotating mechanism in which a chuck is provided and a cutter that moves forward and backward from the side is attached to the chuck, and the workpiece cutting portion can be rotated downward. And then the capacitor lid is chucked and leaks, and the PCB is cut into two receptacles in a state where the PCB is immediately and completely turned 90 degrees downward. The leakage PCB and the cutting condenser case are received by the receiving mechanism that is dropped by releasing the chuck and the bucket is arranged in the water-filled receiving container disposed below, and the leakage PCB is filled with water using its high specific gravity. Most of the storage part is collected from the storage part via the ramp attached to the bottom of the container, and for the condenser case accommodated in the bucket, the low-pressure hot water cleaning consisting of the hot water cleaning of the nozzle in which the PCB does not become turbid in water, The PCB is removed by ultrasonic cleaning using a cleaning agent in which the PCB hardly dissolves in the cleaning liquid, and hot water rinsing finish cleaning, and then moved to an off-line decomposition / sorting yard where paper, aluminum foil, Separated into vinyl film, fiber and metal material, put the metal material on-line before the ultrasonic cleaning, ultrasonic cleaning again, hot water The PCB is removed from the entire layer including the inside of the laminate by being subjected to the rinsing finish cleaning, and the PCB recovery from the low-pressure hot water cleaning and the hot water rinsing finishing cleaning is settling recovery from the lower part of each cleaning tank, For wastewater in which a small amount of PCB from sonic cleaning is dissolved, coagulant mainly composed of a flocculant extracted from plants such as seaweed that can be eaten in a stirring tank and a cationic food additive. The PCB is flocked by charging with the agent and collected by filtration, and the clean water is reused and is not discarded to the outside. The paper, aluminum foil, vinyl film, fiber and It is assumed that the floc is completely extracted and separated from the PCB by a supercritical extraction device, and all the cleaning steps are performed under exhaust recovery in a closed space. Recovery method from the vessel.

Images