JP6259745B2 - Hazardous substance extraction device - Google Patents

Description

  The present invention relates to a harmful substance extraction apparatus that extracts harmful substances from articles containing harmful substances such as capacitors containing harmful substances harmful to humans and animals.

  Organic compounds as harmful substances include acyclic and cyclic hydrocarbon compounds containing no halogen, and acyclic and cyclic organic halogen compounds containing halogen. In this organic halogen compound, specifically, the liquid organic halogen compound includes a solution of PCB oil or the like in which PCB (Polychlorinated Biphenyl) is dissolved in oil, a solution containing dioxin, DDT (Dichloro diphenyl trichloroethane: And solutions containing dichlorodiphenyltrichloroethane, organochlorine insecticides, and agrochemicals).

  Examples of gaseous harmful substances include volatile organic compounds. This volatile organic compound also includes the above-described hydrocarbon compounds and organic halogen compounds. Specific examples of the gaseous organic halogen compound include gas in which PCB is vaporized, gaseous dioxin in which PCB is combusted, and gas in which DDT is gaseous.

  PCB, which is an organic halogen compound, is included in dioxins. Dioxins basically have a structure in which a benzene ring composed of carbon is bonded with oxygen and attached with chlorine. Moreover, PCB has high resistance to acids and alkalis and is chemically stable, is very stable thermally, and has excellent electrical insulation, and exists in a wide range from liquid to solid.

  For this reason, PCBs are transformers and capacitors as articles containing harmful substances, insulating oils such as ballasts, plasticizers such as electric wires, heat media in various processes of various chemical industries, carbonless paper (pressure-sensitive copying paper) Etc., and has been used in large quantities in a wide range of fields regardless of applications. In addition, as a ballast containing PCB, there exists a ballast used for the fluorescent lamp for business and facilities manufactured before August, 1972, for example.

  However, PCB is a harmful substance and is vaporized at a certain temperature to become a harmful gas, and when burned, it becomes a harmful gas such as dioxin and causes environmental pollution. In addition, PCBs have been found to accumulate in the human body due to PCBs, especially through fish and shellfish, due to bioaccumulation through the food chain. For this reason, PCB production was banned in 1972.

  As a result, the direct pollution problem due to PCB manufacturing has been avoided, but PCBs are still widely used due to their high versatility, and now PCBs are treated and disposed harmlessly. There is a need. In the case of processing and disposal of this PCB, in the above-mentioned hazardous substance-containing articles, in many cases, it is necessary to extract the PCB once. As this PCB extraction method, for example, there is a hazardous material processing facility described in Patent Document 1.

  The hazardous substance treatment facility first cleans a PCB oil-filled container such as a capacitor or a transformer containing PCB, and concentrates the PCB in the cleaning waste liquid to a predetermined concentration. The concentrate containing the concentrated PCB is stored in a tank, and the PCB is extracted by introducing a polar extraction solvent into the tank. The extracted PCB is decomposed by an organic substance decomposition processing apparatus.

JP 2006-216070 A

  However, in the technique of Patent Document 1, when PCB is extracted from a PCB oil-filled container, the PCB oil-filled container is once washed. Next, the PCB in the cleaning waste liquid is concentrated to a predetermined concentration. Next, a multi-step procedure is required in which the concentrate containing the concentrated PCB is stored in a tank, and the PCB is extracted by introducing a polar extraction solvent into the tank. For this reason, there exists a problem that PCB cannot be extracted easily and in a short time from a PCB oil-filled container (article containing harmful substances).

  The present invention has been made in view of such a background, and is capable of easily and quickly extracting harmful substances from articles containing harmful substances such as capacitors and transformers containing harmful substances such as PCBs. It is an object to provide an extraction device.

  In order to solve the above-described problem, the harmful substance extraction apparatus according to claim 1 of the present invention is an article containing a conductive material and containing a liquid or solid harmful substance. A mounting means in which at least one through hole is provided on a mounting surface on which one or more open holes are mounted downward, and the article mounted on the mounting means is hermetically sealed A tank disposed in the chamber, a tank disposed via a pipe below the position where the through-hole of the mounting means is provided, and a power source disposed near the article housed in the chamber. And a first coil to which a high-frequency current is supplied.

  According to this configuration, when a high-frequency current is supplied to the first coil, the conductive material on the outer peripheral side of the article and the inside through the hole is induction-heated, whereby the entire article is heated in a short time to a predetermined temperature. Rise. The solidified harmful substance contained in the heated article is melted and melted in a short time and easily flows. Furthermore, liquid harmful substances are also melted in a short time by heating, and the viscosity thereof is lowered to facilitate flow. The liquid harmful substance that has become easy to flow flows down through the through hole of the mounting means, passes through the piping, and flows into the tank. In this way, harmful substances can be easily extracted from articles containing harmful substances in a short time.

  The invention according to claim 2 is characterized in that in claim 1, further comprising a cooling means for cooling the tank.

  According to this configuration, since the liquid harmful substance is stored in the tank and cooled, the vaporization of the liquid harmful substance can be suppressed so as not to leak to the outside.

  According to a third aspect of the present invention, in the first or second aspect, the second coil to which a high frequency current is supplied from a power source and the vicinity of the second coil are arranged, and induction is performed when the high frequency current is supplied to the second coil. A thermal decomposition means using conductive ceramics that generates heat when heated, an introduction means for sucking a gas from the interior of at least one of the chamber and the pipe and introducing the gas into the thermal decomposition means; and And a discharge means for discharging the gas.

  According to this configuration, when the liquid harmful substance flows down from the article to be induction-heated, the harmful gas in which the liquid harmful substance is vaporized in the chamber, the pipe and the tank is introduced into the thermal decomposition means by the introducing means. The introduced harmful gas can be decomposed harmlessly by the heat of the conductive ceramics, and the decomposed gas can be discharged from the discharge means. That is, even if harmful gas is generated during extraction of harmful substances from the article, it can be decomposed into harmless gas.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the introduction unit includes a vacuum unit that sucks gas from the inside of the chamber and the pipe to the side of the thermal decomposition unit, and places the inside in a vacuum state. It is further provided with the feature.

  According to this configuration, since the internal pressure is lowered by making the inside of the chamber in a vacuum state, the toxic substance is melted faster by induction heating. That is, the liquid contained in the article or the harmful substance solidified in the liquid can be quickly melted and flowed easily. For this reason, extraction of harmful substances can be performed in a shorter time.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the opening means for opening at least one or more holes in the article and the article having the holes opened therein are provided in the chamber. Before storing, the conveying means that conveys to the placing means and places the hole in the placing means with the hole facing downward, the article to be opened and the opening means, the placing means, and the chamber And sealing means for hermetically enclosing on the transport path of the transport means, filling the inside of the sealing means with an inert gas, and collecting the filled inert gas after passing through the harmful substance adsorbing means And a gas generation and recovery means.

  According to this configuration, after filling the sealing means with an inert gas, the opening means opens a hole in the article, the article is transferred by the transfer means, and the hole is placed on the mounting means with the hole facing down. The article can be stored in the chamber. That is, since a hole is made in the article in the inert gas filling space, it is possible to prevent a harmful substance inside the article from being oxidized and changed into a harmful gas when the hole is made. In addition, the process of placing an article with a hole on the placing means and storing it in the chamber is also performed in an inert gas filling environment, so that generation of harmful gas can be prevented during that time. In addition, after the above-described drilling and storing processes are completed, the inert gas can be recovered, so that the expensive inert gas is not wasted. In addition, before collecting the inert gas, the inert gas passes through the harmful substance adsorption means. At this time, even if the harmful gas is mixed in the inert gas, it should be adsorbed and removed. Can do.

A sixth aspect of the present invention is the method according to any one of the first to fourth aspects, wherein the conductive material is included, the liquid or solidified harmful substance is contained, and one or more holes are opened. When replacing the article with a hazardous substance-containing paper, the hazardous substance-containing paper is sandwiched between conductors capable of high frequency induction to form an embedded body, and the embedded body is placed with no through holes. It is mounted on the means and accommodated in the chamber, and a high-frequency current is supplied to the first coil to inductively heat the conductor of the built-in body.

  According to this configuration, when a high-frequency current is supplied to the first coil, the respective conductors sandwiching the harmful substance-containing paper are induction-heated. By this induction heating, the paper among the harmful substance-containing paper between the conductors is carbonized, and the harmful substance contained in the paper becomes a gaseous harmful gas. This harmful gas is introduced into the thermal decomposition means by the introduction means and decomposed into harmless gas. On the other hand, the carbon component of the carbonized paper remains on the placing means. Thus, harmful substances can be extracted and decomposed easily and in a short time from the harmful substance-containing paper containing the harmful substances.

  The invention according to a seventh aspect is the invention according to the sixth aspect, wherein the built-in body is configured such that the conductor and the hazardous substance-containing paper are alternately stacked in one or more stages in this order, and the conductor is placed on the top. It is characterized by having a mounted configuration.

  According to this configuration, the paper is carbonized among the harmful substance-containing paper between the upper and lower conductors that are induction-heated, and the harmful substance is vaporized to become harmful gas. An induced current flows through the carbonized component of the paper by high frequency induction, so that the carbonized component is further finely separated. At this time, even if a slightly harmful substance remains in the carbonized component, it is vaporized and becomes a harmful gas. . Further, when the carbonized component is finely separated, the bulk is reduced, but each conductive plate is lowered by its own weight, so that the conductive plate is always in contact with the carbonized component of the paper. For this reason, even if paper that is not carbonized remains, the paper is carbonized by heating the conductive plate, and residual harmful substances are also vaporized to become harmful gases.

  According to the harmful substance extraction apparatus of the present invention, a harmful substance can be easily and quickly extracted from a hazardous substance-containing article such as a capacitor or a transformer containing a harmful substance such as PCB.

It is a figure which shows the structure of the harmful substance extraction apparatus which concerns on embodiment of this invention as a partial cross section. (A) shows the structure of the harmful substance decomposition | disassembly apparatus in the harmful substance extraction apparatus of this embodiment, (b) is sectional drawing of A1-A1 shown to (a). It is a figure which shows the structure at the time of extracting PCB from PCB containing carbonless paper with the harmful substance extraction apparatus of this embodiment as a partial cross section. It is a perspective view which shows the structure of the PCB containing carbonless paper built-in body arrange | positioned in the vacuum chamber of the harmful substance extraction apparatus of this embodiment.

Next, an embodiment of the present invention (hereinafter referred to as “embodiment”) will be described.
<Configuration of Embodiment>
FIG. 1 is a diagram showing a partial cross-sectional view of a configuration of a hazardous substance extraction device according to an embodiment of the present invention.

  A harmful substance extraction apparatus 10 shown in FIG. 1 extracts a harmful substance from a harmful substance-containing article (also simply referred to as an article) containing a harmful substance such as PCB. Articles include transformers, capacitors and ballasts as PCB-containing electrical equipment, PCB-containing carbonless paper, containers with PCB oil attached, and the like. In addition, the electrical material containing PCB uses the electrically conductive material which is metals, such as aluminum, copper, and iron, in the inside and outside. In addition to PCBs, harmful organic substances include liquid organic halogen compounds such as dioxin and DDT, and various other harmful substances.

  A high-voltage transformer as an electrical device in which an insulating oil containing PCB is sealed is filled with a mixed liquid of PCB oil and trichlorobenzene (for example, a weight ratio of 3: 2). For example, a transformer of 50 kVA contains about 85 kg of PCB. The high voltage capacitor is filled with PCB oil. For example, a 100 kVA capacitor contains about 40 kg of PCB. A low-pressure capacitor is also used in the ballast of the fluorescent lamp, and a small amount of PCB is impregnated in a gap between the wrapping paper in the capacitor. These impregnated PCBs are in a liquid form regardless of their viscosity, but there are also PCBs in which the liquid form is solidified due to deterioration over time.

  In the present embodiment, an example of extracting PCB oil as a harmful substance from an article containing harmful substances will be described. In FIG. 1, as an article, a capacitor 11 containing PCB is taken as an example. Further, during the extraction process of PCB oil, harmful gas in which PCB is vaporized is also generated, which is harmlessly decomposed by a harmful gas decomposition apparatus 50 shown in FIG. 2 described later. Therefore, the harmful substance extraction device 10 is configured to further include the harmful gas decomposition device 50.

  A harmful substance extraction device 10 shown in FIG. 1 includes a pallet 20 on which a capacitor 11 is placed, an article transport device 21, a sealed chamber 22 to which a pipe 22a is connected, a drill driving device 23 having a plurality of drills 23a, A vacuum chamber 24 to which a pipe 24 a is connected, a chamber moving device 25, an induction heating coil 26, an AC power source 27, and an article mounting table 28 are provided.

  Further, the harmful substance extraction apparatus 10 includes a harmful liquid extraction pipe 29 to which a pipe 29a is branched, a gate valve driving apparatus 31 for opening and closing the gate valve 31a, a tank 32, and a liquid nitrogen supply apparatus 33 having a pipe 33a. And opening / closing valves 22b, 22c, 22d, 24b, and 29b, which are electromagnetic valves, a suction pump 35, a vacuum pump 36, an activated carbon filter 37, a gas generation and recovery device 38, and a control device 40. ing.

  Each component described above constitutes each means described in the claims as follows. That is, the sealed chamber 22 is a sealing means, the drill driving device 23 having a drill 23a is an opening means, the article mounting table 28 is a mounting means, the vacuum chamber 24 is a chamber, the coil 26 is a first coil, and a liquid nitrogen supply having a pipe 33a. The apparatus 33 constitutes cooling means, the vacuum pump 36 constitutes vacuum means, the activated carbon filter 37 constitutes harmful substance adsorption means, and the gas generation and recovery apparatus 38 constitutes gas generation and recovery means.

The pallet 20 has a plate-like structure on which the capacitor 11 is placed and held.
The article conveying device 21 conveys the capacitor 11 from the outside to the inside or from the inside to the outside via a door (not shown) of the sealed chamber 22 as indicated by the bidirectional arrow Y1. The door of the sealed chamber 22 is opened when the capacitor 11 is passed into or out of the sealed chamber 22, and is closed after the passage. By this closing, the sealed chamber 22 is sealed. The capacitor 11 is placed on the pallet 20 during conveyance into the sealed chamber 22, but may be moved in and out of the sealed chamber 22 while being placed on the pallet 20.

  Further, the article transporting device 21 inverts the capacitor 11 on the pallet 20 located inside the sealed chamber 22 and places it on the article placing table 28 as indicated by a bidirectional arrow Y2 (right direction). It also has functions. The capacitor 11 placed upside down on the article placement table 28 is also referred to as the upside down capacitor 11. The article mounting table 28 has a plate shape having a large number of through holes penetrating vertically up to the peripheral portion.

  The article mounting table 28 may have a structure in which one large through hole is formed as long as the upside down capacitor 11 placed on the upper surface does not fall downward. In this case, the upside down capacitor 11 is placed on the periphery of one through hole. Therefore, the PCB oil extracted from the upside down capacitor 11 flows through the through hole.

  Further, the article transport device 21 moves the upside down capacitor 11 after the PCB oil extraction, which will be described later, on the article mounting table 28 onto the pallet 20 as indicated by a bidirectional arrow Y2 (left direction), and further bidirectionally. As indicated by an arrow Y1 (left direction), it also has a function of transporting outside the sealed chamber 22.

In the article transport device 21, an opening 21a penetrating vertically is formed at a position where the article placement table 28 is disposed. The opening 21a has a mortar-like inclined surface shape in which the upper surface side of the article conveying device 21 has a large diameter and the lower surface side has a small diameter, and the large diameter and the small diameter are connected in an inclined shape. The large diameter is slightly smaller than the width of the article mounting table 28.
An upper end of a harmful liquid extraction tube (also simply referred to as a tube) 29 is joined to the lower surface of the article conveying device 21 so that the upper end opening and the opening 21a communicate with each other.

The lower end of the harmful liquid extraction pipe 29 is joined to the upper surface of the tank 32 so that the lower end opening communicates with an opening (not shown) provided on the upper surface of the tank 21.
That is, the opening 21 a of the article transporting device 21 and the opening (not shown) provided on the upper surface of the tank 21 are in communication with each other through the harmful liquid extraction pipe 29.

  A gate valve 31 a is incorporated in the upper end portion of the harmful liquid extraction pipe 29. The gate valve 31 a is driven by the gate valve driving device 31 so as to close or open the upper end opening of the harmful liquid extraction pipe 29.

  The tank 32 has a box shape for storing PCB oil, and a pipe 33a extending to supply liquid nitrogen is wound around the outer surface of the tank 32 by a predetermined number of times as indicated by an arrow Y33 from the liquid nitrogen supply device 33. It is rotated and arranged. The inside of the tank 32 is cooled by the circulation of liquid nitrogen to the pipe 33a. However, the tank 21 may be cooled by other methods.

  When the tank 32 is cooled, a temperature difference occurs such that the inside of the tank 32 is cold and the inside of the upper pipe 29 is warm. For this reason, as shown by an arrow Y7, harmful gas due to vaporized PCB generated when PCB oil (described later) flows into the tank 32 from above rises from the cold tank 32 into the warm pipe 29. Thereby, it is easy to flow into the pipe 29 a branched from the pipe 29 and sucked by the vacuum pump 36. Further, when the tank 32 is cooled, the vaporization of the PCB oil stored in the tank 32 is suppressed.

  The sealed chamber 22 has a box shape and is arranged on the upper surface of the article conveying device 21. The sealed chamber 22 includes a drill driving device 23 having a plurality of drills 23 a, a vacuum chamber 24 to which piping 24 a is connected, and a chamber moving device 25. The induction heating coil 26, the AC power source 27, and the article mounting table 28 are housed in a sealed state. Further, in the sealed chamber 22, the above-described door (not shown) is attached to the side wall on the carry-in / out side of the capacitor 11 so as to be freely opened and closed.

  The drill driving device 23 rotates a plurality of drills 23 a to open a plurality of holes on the upper surface of the capacitor 11. The diameter and the depth of the hole are set to a diameter and a depth at which the PCB oil easily flows downward when the PCB oil is extracted from the upside down condenser 11 with the hole facing downward as described later. Moreover, it is preferable that the positions of the plurality of holes are opened at positions where PCB oil in the upside down condenser 11 flows efficiently.

  The vacuum chamber 24 is made of heat-resistant glass and is formed into a longitudinal bowl shape in the vertical direction, and a pipe 24a is joined to the chamber side surface so as to communicate with the inside of the chamber. The bowl-shaped opening end of the vacuum chamber 24 is placed on the upper surface of the article transporting device 21 without any gap. As a result, the inside of the vacuum chamber 24 can be evacuated in a state where the upside down capacitor 11 is accommodated.

  The vacuum chamber 24 may be any material other than heat-resistant glass as long as it is a material that does not undergo induction heating or is difficult to perform, has high heat resistance, and has low thermal stretchability (this characteristic is referred to as thermal characteristics). It may be formed of the material. Examples of the material having the thermal characteristics include general ceramics and alumina in addition to glass. The article mounting table 28 may also be formed of a material having thermal characteristics.

  The chamber moving device 25 performs driving for moving the vacuum chamber 24 in the vertical direction indicated by the bidirectional arrow Y3. The chamber moving device 25 moves the vacuum chamber 24 to a predetermined upper limit position when moving the vacuum chamber 24 upward. The upper limit position refers to a position where a space in which the capacitor 11 can be placed on the article placement table 28 is formed on the lower end side of the vacuum chamber 24 at the upper limit position. When the vacuum chamber 24 is moved downward, the vacuum chamber 24 is moved until the lower end of the vacuum chamber 24 comes into contact with the upper surface of the article conveying device 21 in a sealed manner.

The AC power supply 27 supplies a high-frequency current to an induction heating coil (also simply referred to as a coil) 26.
The coil 26 is configured by winding a conductive wire a predetermined number of times around the outer periphery of the vacuum chamber 24 via a gap with a predetermined interval. The coil 26 is wound around the upside down capacitor 11 in the vacuum chamber 24 when the vacuum chamber 24 is placed on the article transporting device 21. Further, both ends of the coil 15 are connected to the positive electrode and the negative electrode of the AC power supply 27.

  However, the arrangement of the coil 15 may be arranged in other manners on the outer peripheral side of the vacuum chamber 24 as long as the coil 15 performs a function of induction heating the upside down condenser 11 on the article mounting table 28 as will be described later. For example, the coil 15 may be a planar coil in which a conducting wire is wound in a flat circular shape or an elliptical shape, a meandering coil in which the conducting wire is meandered in a plane, or the like. A plurality of them may be arranged.

  When a high-frequency current is supplied from the AC power supply 27 to the coil 15, the upside down capacitor 11 placed on the article placement table 28 has an eddy current (inductive current) on its outer peripheral surface and an internal conductive portion through a plurality of holes. ) Is induced, and the outer periphery and the inside are heated by Joule heat due to the induced current. The heating temperature of the upside down capacitor 11 at this time is about 650 ° C.

  However, the heating temperature of the upside down capacitor 11 is lower than the decomposition temperature at which harmful gases described later can be decomposed harmlessly, but may be the decomposition temperature. Further, the heating temperature can be variably controlled by changing the electric power when supplying the high frequency current from the AC power supply 27 to the coil 26. For example, the temperature of the upside down capacitor 11 may be detected by a temperature sensor (not shown) and the power of the AC power supply 27 may be controlled by the control device 40 so that the detected temperature becomes a predetermined temperature.

  When the upside-down condenser 11 reaches about 650 ° C. by induction heating, the viscosity of the internal PCB oil is reduced and it becomes easy to flow. Or when solidified PCB exists in the capacitor | condenser 11, it melts and melt | dissolves and it becomes easy to flow. Such low-viscosity PCB oil flows down the harmful liquid extraction pipe 29 from the hole of the upside down condenser 11 and flows into the tank 32 as indicated by an arrow Y7.

  As described above, when the low-viscosity PCB oil flows down, as described above, harmful gas is generated by vaporizing the PCB oil. The harmful gas in the tank 32 rises from the inside of the cooled tank into the warm pipe 29 and is sucked by the vacuum pump 36 into the branched pipe 29a as indicated by an arrow Y8. The sucked harmful gas is discharged to the harmful gas decomposition apparatus 50 (see FIG. 2) as indicated by an arrow Y9.

  However, since the inside of the upside down condenser 11 continues to be induction-heated while the PCB oil having a low viscosity due to induction heating flows down, it finally becomes dry after all the PCB oil inside has flowed down.

  As indicated by arrows Y6 (right direction) and Y8, the vacuum pump 36 performs suction in the pipes 24a and 29a, so that the interiors of the vacuum chamber 24, the harmful liquid extraction pipe 29, and the tank 32 communicate with each other. A vacuum state is established (referred to as a communication internal space). However, at this time, the gate valve 31a of the harmful liquid extraction pipe 29 is opened, the opening / closing valve 22c is closed, and the opening / closing valves 24b, 29b are opened.

  In this way, the vacuum chamber 24 is evacuated and the internal upside down capacitor 11 is induction-heated as described above. The reason why induction heating is performed in a vacuum state is that the viscosity of the PCB oil in the upside-down condenser 11 decreases more rapidly as the internal pressure in the vacuum chamber 24 is lower.

  On the side wall of the sealed chamber 22, a U-shaped pipe 22 a that causes gas outflow (arrow Y 4) and inflow (arrow Y 5) to the sealed chamber 22 is attached. That is, the outflow end and the inflow end of the U-shaped pipe 22 a are attached to the outside of the side wall of the sealed chamber 22 so as to communicate with the room.

  Between the inflow end and the outflow end of the U-shaped pipe 22a, a suction pump 35, an on-off valve 22b, an activated carbon filter 37, a gas generation and recovery device 38, and an on-off valve 22d are arranged at predetermined intervals in this order. It is installed. The piping 22a between the gas generation and recovery device 38 and the opening / closing valve 22d is branched, and the tip of the piping 22a extending from this branching portion is connected to the piping 24a between the vacuum chamber 24 and the opening / closing valve 24b. However, an open / close valve 22c is disposed between the connecting portion and the branch portion.

  The gas generation and recovery device 38 generates an inert gas such as argon gas and recovers the inert gas. The activated carbon filter 37 adsorbs and removes impurities such as harmful gases contained in the inert gas. The inert gas generated by the gas generation and recovery device 38 is introduced into the sealed chamber 22 as indicated by an arrow Y5 through the pipe 22a and the opening / closing valve 22d. Alternatively, it is introduced into the vacuum chamber 24 through the opening / closing valve 22c and the pipes 22a and 24a. These introduced inert gases are sucked by the suction pump 35 in the direction indicated by the arrow Y4 and recovered by the gas generation and recovery device 38. The suction pump 35 may be a blower.

  The inert gas flowing into the sealed chamber 22 has a concentration (this concentration is referred to as “necessary concentration”) that can prevent PCB from being converted into dioxin by an oxidation reaction. Since PCB exists inside the capacitor 11, when air is present in the sealed chamber 22 when the drill 11a is opened to the capacitor 11, the PCB is converted into dioxin by an oxidation reaction. In order to prevent this, the sealed chamber 22 is filled with an inert gas having a necessary concentration.

  Furthermore, since the sealed chamber 22 is filled with an inert gas having a necessary concentration, ignition in the sealed chamber 22 can be prevented. When performing a process such as drilling the capacitor 11 or supplying a high-frequency current from the AC power supply 27 to the coil 26, if even a small amount of carbon is present in the sealed chamber 22, there is a possibility of ignition. This can be prevented by filling with an inert gas.

  Further, the generation of the inert gas from the gas generation and recovery device 38 is also performed in the vacuum chamber 24. Even if the vacuum pump 36 is stopped immediately after completion of the extraction of the PCB oil from the upside down condenser 11, the inside of the vacuum chamber 24 is in a substantially vacuum state for a predetermined time. For this reason, the vacuum chamber 24 is in close contact with the article conveying device 21, and the vacuum chamber 24 cannot be moved upward. Therefore, an inert gas is introduced into the vacuum chamber 24, and the inside of the vacuum chamber 24 is made substantially the same as the atmospheric pressure. Thereby, the vacuum chamber 24 can be moved upward. After this movement, the inert gas filled in the vacuum chamber 24 is discharged into the sealed chamber 22, and the discharged inert gas is recovered by the gas generation and recovery device 38 via the path indicated by the arrow Y4. It is supposed to be.

  Further, when the vacuum pump 36 is stopped after completion of the PCB oil extraction, if PCB oil remains in the communication internal space including the vacuum chamber 24, oxygen will enter the communication internal space unless an inert gas is added. There is a possibility of coming. In this case, the PCB oil is oxidized to generate dioxins. In order to prevent this, an inert gas is introduced.

  The control device 40 includes an article conveying device 21, a drill driving device 23, a chamber moving device 25, an AC power source 27, a gate valve driving device 31, a liquid nitrogen supply device 33, and open / close valves 22b, 22c, 22d, The 24b and 29b, the suction pump 35, the vacuum pump 36, and the gas generation and recovery device 38 are controlled so as to perform the above-described operations. The order of this control and the like will be described in an operation process of an embodiment described later. The control device 40 also controls the harmful gas decomposition device 50 (see FIG. 2) as described later.

  Control of the control device 40 is realized by, for example, a CPU (Central Processing Unit) developing a program stored in a storage unit (not shown) in a main memory such as a RAM (Random Access Memory) and executing the program.

  Next, the harmful gas decomposition apparatus 50 shown in FIG. 2 will be described. FIG. 2A shows the configuration of the harmful gas decomposition apparatus 50 connected to the harmful substance extraction apparatus 10 of this embodiment, and FIG. 2B is a cross-sectional view taken along line A1-A1 shown in FIG.

  In the harmful gas decomposition apparatus 50, a gas introduction pipe 54a is connected to the pipe 29a (see FIG. 1), and harmful gas flows in (or is introduced) from one end side as indicated by an arrow Y9. The harmful gas is harmlessly decomposed.

  The harmful gas indicated by the arrow Y9 is mainly a PCB vaporized gas generated during the PCB oil extraction process in the harmful substance extraction apparatus 10 (FIG. 1). However, the harmful gas decomposing apparatus 50, in addition to PCB vaporized gas, generates dioxins obtained by burning PCB, gaseous organic halogen compounds such as gaseous DDT, and other harmful gases such as various harmful gases at high temperatures. It is thermally decomposed by heating to a harmless decomposition gas. Decomposing this harmful gas into a harmless gas means that, for example, in the case of PCB, the benzene ring by carbon constituting the PCB is decomposed and separated into oxygen, chlorine and carbon.

  The harmful gas decomposition apparatus 50 includes a cylindrical conductive ceramic 51, an induction heating coil 52, a gas introduction pipe 54a, a gas discharge pipe 54b, open / close valves 55a and 55b, a suction device 56, and a water scrubber 57. The activated carbon filter 58 and an AC power source (power source) 59 are provided.

  The gas introduction pipe 54a and the gas discharge pipe 54b are also referred to as pipes 54a and 54b. The piping 54a and the opening / closing valve 55a shown in FIG. 2 and the piping 29a, the opening / closing valve 29b and the vacuum pump 36 (or blower) shown in FIG. The pipe 54b, the open / close valve 55b, and the suction device 56 shown in FIG. 2 constitute the discharge means described in the claims, and the coil 52 constitutes the second coil described in the claims.

  The gas introduction pipe 54a and the gas discharge pipe 54b form a circular tube having a predetermined length, and allow harmful gas or decomposition gas to pass through the circular tube. The gas introduction pipe 54a and the gas discharge pipe 54b are formed of the material having the above-described thermal characteristics (for example, alumina).

  The gas introduction pipe 54a is connected in communication with the pipe 29a (see FIG. 1), and harmful gas is introduced (or introduced) from one end side as indicated by an arrow Y9. Furthermore, the other end side of the gas introduction tube 54a is connected to the inlet side of the conductive ceramic 51, and an opening / closing valve 55a is disposed between the one end side and the other end side.

  One end side of the gas discharge pipe 54 b is connected to the outlet side of the conductive ceramic 51. Between the one end side of the gas exhaust pipe 54b and the other end side where the cracked gas (described later) indicated by the arrow Y10 is discharged, the opening / closing valve 55b, the suction device 56, Water scrubber 57 and activated carbon filter 58 are arranged at a predetermined interval.

  The connection between the gas introduction pipe 54a and the gas discharge pipe 54b and the conductive ceramic 51 is performed through a flange (not shown) made of the above-described material having thermal characteristics, or is screwed with a screw structure. Or

  The suction device 56 performs an operation of sucking gas from the gas discharge pipe 54b side toward the gas introduction pipe 54a. That is, a gas such as harmful gas or air is sucked from the inlet of the gas introduction pipe 54a as indicated by an arrow Y9, and the sucked gas passes through the conductive ceramic 51 and is discharged from the outlet of the gas discharge pipe 54b (arrow Y10). ) To perform a suction operation. A blower, a standard pump other than a vacuum pump, or the like is applied to the suction device 56. However, a vacuum pump may be applied.

  Each of the open / close valves 55a and 55b is an electromagnetic valve, and the internal passages of the gas introduction pipe 54a and the gas discharge pipe 54b are opened when the valve is closed and opened when the valve is opened. When the suction device 56 performs a suction operation when both the open / close valves 55a and 55b are opened, harmful gas flows in the direction indicated by the arrow Y9 from the inlet of the gas introduction pipe 54a and passes through the conductive ceramics 51. The cracked gas decomposed during the passage flows through the gas discharge pipe 54b, passes through the suction device 56, the water scrubber 57, and the activated carbon filter 58, and is discharged from the discharge port to the atmosphere in the direction indicated by the arrow Y10. On the other hand, when the open / close valves 55a and 55b are closed, the gas introduction pipe 54a and the gas discharge pipe 54b are shielded by the open / close valves 55a and 55b, and harmful gas and decomposition gas are shut off.

  As shown in FIGS. 2A and 2B, the induction heating coil 52 is configured by winding a conductive wire a predetermined number of times in the circumferential direction through a gap G with a predetermined interval on the outer peripheral side of the conductive ceramic 51. Yes. Both ends of the coil 52 are connected to the positive electrode and the negative electrode of the AC power source 59. The AC power supply 59 supplies a high frequency current to the coil 52.

  The conductive ceramic 51 is a thermal decomposition means 53 serving as a heating element having high conductivity and capable of high frequency induction heating, and also has general ceramic characteristics. When a high frequency current is supplied to the coil 52 from the AC power source 59, the conductive ceramic 51 induces an eddy current (inductive current) on the outer peripheral surface thereof, and the Joule heat generated by the induced current causes the outer peripheral surface to move inward. Heated. The entire conductive ceramic 51 becomes high temperature due to heat conduction by this heating. This temperature is about 1800 ° C. as a practical compensation temperature, but can be heated up to the melting point of the conductive ceramic 51, that is, up to about 3000 ° C.

In the present embodiment, the internal space of the conductive ceramic 51 is held at a temperature (referred to as a decomposition temperature) between about 1350 ° C. and 1500 ° C. necessary for decomposition of harmful gases. Incidentally, the temperature required for the decomposition of the benzene ring is about 1350 ° C.
Such conductive ceramics 51 harmlessly decomposes harmful gases that pass through or contact or collide with the interior at the decomposition temperature.

  Further, the decomposition temperature of the conductive ceramic 51 can be set in a range from the lowest temperature to about 3000 ° C. according to the ambient environment temperature by changing the electric power when the high frequency current is supplied from the AC power source 59. .

  The decomposition temperature can be set by adjusting the power of the AC power supply 59. This may be done by a person or automatically as follows. For example, a temperature sensor (not shown) that detects the temperature of the conductive ceramic 51 is provided, and the control device 40 (see FIG. 1) causes the temperature detected by the temperature sensor to be equal to or higher than the decomposition temperature of the internal space of the conductive ceramic 51. In addition, the power of the AC power supply 59 is variably controlled.

  The water scrubber 57 separates and removes harmful components that remain slightly undecomposed in the decomposed gas after the harmful gases are decomposed by the conductive ceramics 51. This water scrubber 57 collects and separates harmful components in the exhaust gas in the droplets or liquid film of the absorbing liquid using a liquid such as water as the absorbing liquid.

  When the residual components such as odor molecules remain without being separated by the water scrubber 57, the activated carbon filter 58 adsorbs and removes the residual component molecules through the fine pores of the activated carbon. The cracked gas after this removal is discharged from the outlet of the gas discharge pipe 54b (arrow Y10) as harmless and odorless.

<Operation of Embodiment>
Next, the operation of the extraction process of PCB oil from the capacitor 11 by the harmful substance extraction apparatus 10 according to the embodiment and the operation of the decomposition process of harmful gas generated during the extraction process will be described. These operations are performed under the control of the control device 40.

  In the hazardous substance decomposition apparatus 10 shown in FIG. 1, all the open / close valves 22 b, 22 c, 22 d, 24 b, and 29 b are closed and the gate valve 31 a closes the harmful liquid extraction pipe 29 in the initial state. Further, it is assumed that the vacuum chamber 24 is disposed at the upper limit position. In addition, in the harmful gas decomposition apparatus 50 shown in FIG. 2, it is assumed that the open / close valves 55a and 55b are opened and the conductive ceramics 51 are induction-heated to reach the decomposition temperature or higher.

  In the hazardous substance extraction device 10 shown in FIG. 1, the article transporting device 21 moves from the outside to the inside through the door (not shown) of the sealed chamber 22 as indicated by the bidirectional arrow Y1 (right direction). It is transported and placed on the pallet 20. After this conveyance, the door is closed and the sealed chamber 22 is sealed.

  Next, the opening and closing valves 22b and 22d are opened, the suction pump 35 is operated, and an inert gas is generated from the gas generation and recovery device 38. The generated inert gas flows into the sealed chamber 22 from the pipe 22a through the opening / closing valve 22d as indicated by an arrow Y5. This inflow is performed until the inert gas in the sealed chamber 22 reaches a required concentration. At this time, the sealed chamber 22 is slightly in a negative pressure state.

  When the sealed chamber 22 reaches the required concentration, gas generation from the gas generation and recovery device 38 is stopped. At this time, the inert gas in the sealed chamber 22 is circulated through the path indicated by the arrows Y4 and Y5 while maintaining the necessary concentration.

  Next, holes having a predetermined diameter and depth are opened at predetermined positions on the upper surface of the capacitor 11 placed on the pallet 20 by the plurality of drills 23 a driven by the drill driving device 23. At this time, harmful gas such as vaporized PCB generated slightly from the hole is mixed with the inert gas. The inert gas mixed with the harmful gas is sucked by the suction pump 35 in the direction indicated by the arrow Y4, and is adsorbed by the activated carbon filter 37 when passing through the activated carbon filter 37.

  When the drilling of the capacitor 11 is completed, the gas generation and recovery device 38 is switched to the recovery mode, and the inert gas is recovered. This recovery is preferably performed after all the harmful gas in the inert gas is adsorbed by the activated carbon filter 37. After the collection, the open / close valves 22b and 22d are closed and the suction pump 35 is stopped.

  The capacitor 11 with the hole opened is turned upside down by the article conveying device 21 and placed on the article placing table 28 as indicated by a bidirectional arrow Y2 (right direction). Thereafter, the vacuum chamber 24 is moved to the upper surface of the article conveying device 21 by the chamber moving device 25. The interior of the moved vacuum chamber 24 is sealed.

  Further, the gate valve 31 a is driven by the gate valve driving device 31 so as to open the upper end opening of the harmful liquid extraction pipe 29. Further, liquid nitrogen is supplied from the liquid nitrogen supply device 33 so as to circulate to the pipe 33a, whereby the tank 21 is cooled. The cooling operation of the tank 21 may be performed in advance. Further, the open / close valves 24b and 29b are opened, the vacuum pump 36 is activated, and the air is drawn out of the communication internal space to create a vacuum state as indicated by the bidirectional arrows Y6 (right direction) and the arrow Y8.

  Next, a high frequency current is supplied from the AC power supply 27 to the coil 26, and the outer peripheral surface of the upside down capacitor 11 in the vacuum chamber 24 and the conductive portion inside through the plurality of holes are induction heated. As a result, when the inside and outside of the capacitor 11 is heated to a predetermined temperature, the PCB oil having a low viscosity from the plurality of holes of the upside down capacitor 11 flows down in the harmful liquid extraction pipe 29 as indicated by an arrow Y7. It flows into the tank 32.

  As shown by the arrow Y8, harmful gas such as PCB vaporized during the flow is sucked into the pipe 29a by the vacuum pump 36. Further, when PCB gas flows down, if harmful gas is generated in the vacuum chamber 24, it is sucked by the vacuum pump 36 through the pipe 24a as shown by a bidirectional arrow Y6 (left direction). The harmful gas sucked in this way is discharged as indicated by an arrow Y9 and is introduced into the gas introduction pipe 54a of the harmful gas decomposition apparatus 50 shown in FIG.

  At this time, since the suction device 56 is activated in advance, the introduced harmful gas is sucked toward the conductive ceramics 51. When the harmful gas enters the internal space of the conductive ceramic 51 by this suction, the harmful gas molecules are decomposed by contacting or colliding with the inner wall of the internal space of the conductive ceramic 51 or passing through the internal space. It is decomposed by radiant heat. The decomposed harmless decomposition gas flows into the water scrubber 57 while being sucked by the suction device 56.

  In the water scrubber 57, when a harmful component remains in the flowed-in cracked gas without being decomposed, the harmful component is separated. The separated cracked gas flows into the activated carbon filter 58, where residual components such as residual odor molecules are adsorbed and removed by the activated carbon. The decomposed gas after the removal is discharged from the gas discharge pipe 54b as indicated by an arrow Y10 as harmless and odorless.

  Through this series of processes, all PCB oil is extracted from the upside down capacitor 11 shown in FIG. 1, and harmful gases generated at this time are decomposed by the conductive ceramics 51 (FIG. 2).

  When this extraction and decomposition are completed, first, the vacuum pump 36 and the suction device 56 (FIG. 2) are stopped. At this time, the on-off valves 55a and 55b (FIG. 2) are closed. Next, the on-off valves 24b, 29b and 22d are closed, the on-off valves 22b and 22c are opened, and the suction pump 35 is started. Further, an inert gas is generated from the gas generation and recovery device 38. This inert gas is introduced into the vacuum chamber 24 through the open / close valve 22c as indicated by a bidirectional arrow Y6 (left direction).

  By this introduction, after the inside of the vacuum chamber 24 becomes substantially the same as the atmospheric pressure, the vacuum chamber 24 is moved upward by driving the chamber moving device 25. Thereafter, the generation of the inert gas in the gas generation and recovery device 38 is stopped and the mode is switched to the gas recovery mode.

  The inert gas filled in the vacuum chamber 24 is discharged into the sealed chamber 22 by the movement of the vacuum chamber 24. The discharged inert gas is sucked from the sealed chamber 22 in the direction indicated by the arrow Y4 by the suction pump 35 and recovered by the gas generation and recovery device 38. At this time, the air passing through the gas generating and recovering device 38 is introduced into the vacuum chamber 24 through the opening / closing valve 22c, as indicated by a bidirectional arrow Y6 (left direction), and further discharged into the sealed chamber 22. As shown by the arrow Y4, the suction pump 35 sucks and circulates. All the inert gas is recovered by this circulation.

  After this collection, the suction pump 35 is stopped. Further, after collection, the upside down capacitor 11 after completion of the extraction of the PCB oil on the article placement table 28 is moved onto the pallet 20 as indicated by the bidirectional arrow Y2 (left direction) by the article conveying device 21. Further, as indicated by a bidirectional arrow Y1 (left direction), the sheet is conveyed to the outside of the sealed chamber 22.

<Effect of embodiment>
As described above, the harmful substance extraction apparatus 10 according to the present embodiment includes the article placement table 28 as a means for placing an article containing a harmful substance, the vacuum chamber 24 as a chamber, the tank 32, and the first. And a coil 26 as a coil.

  The article mounting table 28 is an article (for example, a capacitor) containing a harmful substance (for example, PCB) that is formed to include a conductive material on a mounting surface provided with a plurality of through holes and that has changed from liquid or liquid to solidified. 11) is placed. In this placement, the capacitor 11 is placed with at least one hole opened in the capacitor 11 facing downward. The placed capacitor 11 is the above-described upside down capacitor 11.

The vacuum chamber 24 stores the upside down capacitor 11 placed on the article placement table 28 in a sealed manner.
The tank 32 is arranged below the position where the through hole of the article mounting table 28 is provided via a harmful liquid extraction pipe 29 as a pipe.
The coil 26 is disposed in the vicinity of the upside down capacitor 11 accommodated in the vacuum chamber 24, and a high frequency current is supplied from a power source.

  According to this configuration, when a high frequency current is supplied to the coil 26, the conductive material inside the upside down capacitor 11 and through the hole is induction-heated, whereby the entire upside down capacitor 11 is heated in a short time. Is increased to a predetermined temperature. The solidified PCB contained in the heated upside down capacitor 11 is melted and melted out in a short time and easily flows. Furthermore, liquid PCB (PCB oil) is also melted in a short time by heating, and its viscosity is lowered to facilitate flow. The PCB oil that has become easy to flow flows down through the through hole of the article mounting table 28, passes through the piping, and flows into the tank 32. Thus, PCB can be extracted easily and in a short time from the capacitor 11 containing PCB.

  In addition, a liquid nitrogen supply device 33 having a pipe 33 as a cooling means for cooling the tank 32 is further provided.

  According to this configuration, since the PCB oil is stored in the tank 32 and cooled, the vaporization of the PCB oil can be suppressed so as not to leak to the outside.

  Further, heat is generated using a coil 52 as a second coil to which a high-frequency current is supplied from a power source, and a conductive ceramic 51 that is disposed near the coil 52 and generates heat by induction heating when the high-frequency current is supplied to the coil 52. Decomposition means 53, introduction means (pipes 29a, 54a and open / close valves 29b, 54b, blower) for sucking gas from the inside of the vacuum chamber 24 and the harmful liquid extraction pipe 29 and introducing them into the thermal decomposition means 53, and thermal decomposition means 53 is configured to further include discharge means (pipe 54 b and suction device 56) for discharging gas from 53.

  According to this configuration, when PCB oil flows down from the upside-down condenser 11 that is induction-heated, harmful gas that is vaporized from PCB oil is introduced into the communication internal space of the vacuum chamber 24, the harmful liquid extraction pipe 29, and the tank 32. It is sucked by the means and introduced into the thermal decomposition means 53. The introduced harmful gas can be decomposed harmlessly by the heat of the conductive ceramic 51, and the decomposed gas can be discharged from the discharge means. That is, even if harmful gas is generated during the extraction of PCB from the capacitor 11, it can be decomposed into harmless gas.

  Further, when PCB oil flows down from the upside down condenser 11 into the tank 32, a temperature difference occurs such that the inside of the tank 32 is cold and the inside of the pipe 29 above is warm, so that when the PCB oil flows down The harmful gas vaporized in the air rises from the cold tank 32 into the warm pipe 29. This facilitates introduction from the pipe 29 to the thermal decomposition means 53 by the introduction means.

  Further, the introducing means further includes a vacuum pump 36 as a vacuum means for sucking gas from the inside of the vacuum chamber 24 and the harmful liquid extraction pipe 29 to the pyrolysis means 53 side and bringing the inside into a vacuum state. It was.

  According to this configuration, since the internal pressure is reduced by making the inside of the vacuum chamber 24 in a vacuum state, the melting of the PCB by induction heating is accelerated. That is, the liquid or the solidified PCB contained in the capacitor 11 can be quickly melted and flowed easily. For this reason, PCB extraction can be performed in a shorter time.

  Moreover, it was set as the structure further equipped with the drill drive device 23 which has the drill 23a as an opening means, the goods conveyance apparatus 21, the sealing chamber 22 as a sealing means, and the gas production | generation collection | recovery apparatus 38 as a gas production | generation recovery means.

The drill driving device 23 opens at least one or more holes in the capacitor 11 by the drill 23a.
The article transporting device 21 transports the capacitor 11 having the hole opened to the article placing table 28 before placing it in the vacuum chamber 24 and places the capacitor 11 on the article placing table 28 with the hole facing downward.

The sealed chamber 22 encloses and houses the drill driving device 23 having the capacitor 11 to be opened and the drill 23a, the article mounting table 28, and the vacuum chamber 24 in a sealed manner on the article transporting device 21.
The gas generation and recovery device 38 fills the inside of the sealed chamber 22 with an inert gas, and collects the filled inert gas after passing through an activated carbon filter 37 as a harmful substance adsorption unit.

  According to this configuration, after filling the sealed chamber 22 with an inert gas, a hole is made in the capacitor 11 with the drill 23a, the capacitor 11 is conveyed by the article conveying device 21, and the article mounting table 28 is directed downward. Placed on. The placed capacitor 11 can be stored in the vacuum chamber 24 so that the hole faces downward. That is, since a hole is formed in the capacitor 11 in the inert gas filling space, it is possible to prevent the PCB inside the capacitor 11 from being oxidized and changing into harmful gas when the hole is formed. Furthermore, the process of placing the capacitor 11 with the hole on the article mounting table 28 and storing it in the vacuum chamber 24 is also performed in an inert gas filling environment, so that generation of harmful gas can be prevented during that time.

  In addition, after the above-described drilling and storing processes are completed, the inert gas can be recovered, so that the expensive inert gas is not wasted. Furthermore, since the inert gas passes through the activated carbon filter 37 before the inert gas is recovered, even if harmful gas is mixed in the inert gas, it can be adsorbed and removed. it can.

  The above-described vacuum pump 36 can reduce the communication internal space of the vacuum chamber 24, the harmful liquid extraction pipe 29 and the tank 32 from the normal pressure even when a blower or a standard pump other than the vacuum pump is applied. It is.

  In addition, in the harmful substance extraction apparatus 10, a blower may be used instead of the vacuum pump 36. In this case, oxygen exists in the communication internal space, and therefore, when PCB oil is extracted from the upside down condenser 11, it is changed to dioxin by the oxidation reaction of PCB oil. However, the dioxin is discharged by the blower to the harmful gas decomposition apparatus 50 shown in FIG. Thereby, it is possible to prevent dioxin (toxic gas) from leaking into the air.

  Next, as shown in FIG. 3, a PCB-containing carbonless paper built-in body 41 (also referred to as a built-in body 41) is placed on the article mounting table 28a in the vacuum chamber 24, and the PCB is extracted. explain.

  Unlike the above-described article mounting table 28, the article mounting table 28a has no through hole and has a flat plate shape. That is, when processing the PCB-containing carbonless paper, the article mounting table 28 is replaced with the article mounting table 28a.

  As shown in FIG. 4, the built-in body 41 is formed in a disk shape on the four support columns 43 a to 43 d that are evenly arranged along the virtual circumference, and has four through holes in the peripheral portion thereof. The four conductive plates 42a to 42d having the openings are inserted in a horizontal state, and the PCB-containing carbonless paper 44a to 44c is sandwiched between the conductive plates 42a to 42d.

  Each of the conductive plates 42a to 42d has conductivity capable of high frequency induction, and is formed of conductive ceramics or a metal material such as heat-resistant iron or alumina. Each of the conductive plates 42a to 42d is inserted through the columns 43a to 43d so as to be freely dropped by gravity. In this example, the number of the conductive plates 42a to 42d is four, but it is sufficient that the number of the conductive plates 42a to 42d is at least two with the PCB-containing carbonless paper interposed therebetween. In addition, the conductive plates 42a to 42d may have a polygonal plate shape such as a rectangular shape.

  Each of the PCB-containing carbonless papers 44a to 44c sandwiched between the conductive plates 42a to 42d is one or more. Each support | pillar 43a-43d is cylindrical shape, Comprising: It forms with the metal, ceramics, etc. which have heat resistance. The number of each support | pillar 43a-43d should just be the number of at least 1 or more which can support each electroconductive board 42a-42d so that it can fall by gravity up and down freely.

  Although the PCB-containing carbonless papers 44a to 44c are currently prohibited from being manufactured, a large amount of them has remained in the past because they have been sold in large quantities in the past. The PCB-containing carbonless papers 44a to 44c contain PCBs in microcapsules as a solvent for dissolving the carbonless paper dye. The PCB content is mainly 3-5% of the pressure sensitive paper weight.

  When extracting PCB from PCB-containing carbonless paper 44a to 44c, as shown in FIG. The open / close valve 24b is opened, and the harmful liquid extraction pipe 29 is closed by the gate valve 31a. Then, the vacuum pump 36 and the suction device 56 (FIG. 2) are activated. As a result, the vacuum chamber 24 is evacuated by the suction of the vacuum pump 36.

  Next, when a high frequency current is supplied from the AC power source 27 to the coil 26, the conductive plates 42a to 42d sandwiching the PCB-containing carbonless papers 42a to 42d are induction-heated, and the sandwiched PCB-containing carbonless papers 42a to 42d Of 42d, the paper is carbonized, and the PCB contained in the paper becomes a gaseous harmful gas as indicated by arrow Y11. This harmful gas is sucked by the vacuum pump 36 as indicated by an arrow Y11, and decomposed in the same way as described above by the harmful gas decomposition apparatus 50 at the subsequent stage.

  In addition, since an induced current flows in the carbonized component of paper due to high-frequency induction, the carbonized component is further finely separated. At this time, even if a slight amount of PCB remains in the carbonized component, the carbonized component is vaporized and becomes harmful gas. Become. Further, when the carbonized component is finely separated, the bulk thereof is reduced, but the conductive plates 42a to 42d are lowered by their own weight, so that the conductive plates 42a to 42d are always in contact with the carbonized component of the paper. Become. For this reason, even if paper that is not carbonized remains, it is carbonized by heating the conductive plates 42a to 42d, and the remaining PCB is also a harmful gas. In this way, all PCBs contained in the PCB-containing carbonless papers 44a to 44c are vaporized and extracted.

In addition, the built-in body 41 is good also as a structure which sandwiched PCB containing carbonless paper 44a-44c between each of the some electrically conductive board stacked | piled up and down without using support | pillar 43a-43d. In addition, the sandwiched configuration may be supported by a support mechanism (not shown) not in the vertical direction but in the horizontal direction orthogonal to the vertical direction or in an oblique direction.
The PCB-containing carbonless papers 42a to 42d constitute the harmful substance-containing papers described in the claims. This paper containing harmful substances may be paper containing the above-mentioned harmful substances other than PCB. The conductive plates 42b to 42d constitute the conductors recited in the claims.

  In addition, in the embodiment described above, the specific configuration can be appropriately changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Toxic substance extraction apparatus 11 Capacitor 20 Pallet 21 Goods conveyance apparatus 22 Sealed chamber 22a, 24a, 29a Piping 22b, 22c, 24b, 29b Open / close valve 23 Drill drive device 23a Drill 24 Vacuum chamber 25 Chamber moving device 26 Induction heating coil 27 AC Power supply 28, 28a Article placement table 29 Hazardous liquid extraction pipe 31 Gate valve drive device 31a Gate valve 32 Tank 33 Liquid nitrogen supply device 35 Suction pump 36 Vacuum pump 37 Activated carbon filter 38 Gas generation device 40 Control device 41 PCB-containing carbonless paper set Embedded body 42a to 42d Conductive plate 43a to 43d Post 44a to 44c PCB-containing carbonless paper 50 Hazardous gas decomposition device 51 Conductive ceramics 52 Induction heating coil 53, 30, 40, 50 Thermal decomposition means 54 a Gas introduction pipe 54b Gas discharge pipe 55a, 55b Open / close valve 56 Suction device 57 Water scrubber 58 Activated carbon filter 59 AC power supply

Claims (7)

An article containing a conductive material and containing a liquid or solidified harmful substance has at least one on a placement surface on which at least one hole opened in the article is placed downward. Mounting means provided with the above through holes;
A chamber for sealingly storing the article placed on the placing means;
Below the position where the through hole of the placing means is provided, a tank disposed via a pipe,
A first coil that is disposed in a proximity position of the article housed in the chamber and is supplied with a high frequency current from a power source;
A hazardous substance extraction apparatus comprising: The hazardous substance extraction device according to claim 1, further comprising a cooling unit that cools the tank. A second coil to which a high frequency current is supplied from a power source;
A thermal decomposition means using conductive ceramics disposed near the second coil and generating heat by induction heating when a high-frequency current is supplied to the second coil;
Introducing means for sucking gas from the inside of at least one of the chamber and the pipe and introducing the gas into the thermal decomposition means;
Discharging means for discharging gas from the thermal decomposition means;
The toxic substance extraction device according to claim 1, further comprising: The said introducing | transducing means is further equipped with the vacuum means which attracts | sucks gas from the inside of the said chamber and the said piping to the side of the said thermal decomposition means, and makes the said inside a vacuum state, The Claim 3 characterized by the above-mentioned. Hazardous substance extraction device. Opening means for opening at least one or more holes in the article;
Before storing the article in which the hole is opened in the chamber, the conveying means that conveys the article to the placing means, and places the hole on the placing means with the hole facing downward;
A sealing means that encloses the article to be opened and the opening means, the placing means and the chamber in a sealed manner on a transport path of the transport means;
Gas generating and collecting means for filling the inside of the sealing means with an inert gas and collecting the filled inert gas after passing through the harmful substance adsorption means;
The toxic substance extraction device according to claim 1, further comprising: When the article is made of a hazardous substance-containing paper in place of the article that contains the conductive material and contains a liquid or solid harmful substance and has one or more open holes, the hazardous substance-containing paper Is formed with a conductor capable of high frequency induction to form an embedded body,
Placing the built-in body on a mounting means having no through-hole , accommodating the built-in body in the chamber, supplying a high-frequency current to the first coil, and inductively heating the conductor of the built-in body. The hazardous substance extraction device according to any one of claims 1 to 4, wherein the device is a harmful substance extraction device. The built-in body has a configuration in which the conductor and the harmful substance-containing paper are alternately stacked in one or more stages in this order, and the conductor is placed on the top. 6. The hazardous substance extraction device according to 6.

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