JP2010223569A - Method and device of treating pcb - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment method and a treatment device of simple structure and simple operation capable of treating PCB (polychlorobiphenyl) in safety by gasifying it at a low temperature of about 200°C by the electronized air including active oxygen species such as singlet oxygen to suppress generation of extremely-poisonous dioxin. <P>SOLUTION: In this treatment method of PCB, PCB(α) is supplied to a reactor 1 including a stirring machine 2 and a bed material, vapor (γ) is mixed in the electronized air (β) generated from an air electronizing device 9 composed of combination of a discharge needle and an electromagnetic induction coil to prepare the active air (δ) heated to about 200°C, and the active air is supplied to the reactor to hydrolyze and dechlorinate PCB by oxidation power of the heated active air, and the hydrolyzed matter (gaseous substance) is burned at a high temperature of 800°C or more to suppress generation of dioxin. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a PCB processing method and a processing apparatus therefor.

PCB (polyphenyl chloride) is a kind of chemically synthesized organochlorine compounds. The general formula is represented by C ₁₂ HnCL _(10-n) (0 ≦ n ≦ 9), and there are 209 kinds of isomers calculated depending on the number and position of substituted chlorines, which are called PCB (PCB) for short. PCB is stable against heat, has high electrical insulation, and has excellent chemical resistance, so it can be used as an insulating oil, plasticizer, paint, non-carbon for heating and cooling heating media, transformers and condensers. Widely used in paper solvents. However, PCB toxicity became a social problem after the 1968 Kanemi oil symptom incident, and in principle, manufacturing, importation and use were prohibited by the “Law Concerning Chemical Substances Review and Manufacturing Regulations” established in 1973. It was. In addition, the revision of the Waste Disposal Law in 1991 required that PCB waste be strictly managed as “specially managed industrial waste”. Therefore, PCB waste is strictly stored as harmful specific industrial waste, but PCB waste stored in various places in Japan is enormous, and there is an urgent need to take measures for its disposal.

  PCB is an oily substance. Since it is difficult to decompose by heat, does not dissolve in water, has non-flammability and chemically stable properties, it is a stable chemical property. However, PCBs cannot be incinerated in a normal combustion furnace like petroleum and fats and oils. This is because PCB is a kind of dioxins, and if it is burned, highly toxic dioxins are generated and there is a danger of causing spread damage. From such a background, waste treatment standards and facilities including PCBs have not been publicly defined in Japan for a long time, but as a result of the study of safe treatment methods since the 1990s, Diversification has been recognized, and in the 2000s, processing with a view to proving commercial processing technology began to be performed experimentally.

  These methods include a dechlorination decomposition method, a hydrothermal oxidative decomposition method, a reduction thermal chemical decomposition method, a plasma decomposition method, and a photolysis method. In all cases, the chlorine constituting the PCB molecule is treated with an alkaline agent, hydrolyzed with supercritical water, thermally decomposed at high temperatures, decomposed with plasma, or decomposed with ultraviolet light. (Cited document 1).

  Citation 1: Source-free encyclopedia “Wikipedia” polybiphenyl chloride

  These conventional methods are for dechlorination of chlorine, which is an organic chlorine compound. For the dechlorination, we make full use of operation methods that are difficult to operate, such as high temperature, high pressure, photochemical reaction, and plasma irradiation. The reactors that handle these reactions require a structure and materials that can withstand severe conditions such as high temperature, high pressure, strong acid, strong alkali, and high voltage, and the reaction operation is difficult. Therefore, the present invention does not decompose PCB at high temperature and high pressure, can be processed in a low temperature range around 200 ° C. without using acid or alkali, and as a result, it is easy to operate, such as iron plate or stainless steel plate. It is an object of the present invention to provide a simple device that can be manufactured using inexpensive materials.

  In order to solve the problem, a method and an apparatus capable of hydrolyzing PCB at a low temperature around 200 ° C. were developed. In the method, the PCB is hydrolyzed using air containing an active oxygen species such as singlet oxygen as a chemical reactant that decomposes PCB at a low temperature.

  The inventor has already developed an air electronic device (reference material 1) for generating active oxygen species such as singlet oxygen by electromagnetically exciting oxygen molecules in the air, which is the basic technology of the present invention. I am devising.

  Reference Material 1: Utility Model Registration Certificate Registration No. 3133388

  In this electronic device, an electromagnetic coil is wound around the tip of a discharge tube that generates electrons from a discharge needle through which a high voltage is applied, and oxygen molecules in the air are electromagnetically excited by flowing air into the center of the coil. This is an air electronic device that generates active oxygen species such as singlet oxygen.

  It is known that reactive oxygen species such as singlet oxygen have extremely strong oxidizing power (Reference Document 1).

  Reference 1: Active oxygen (P13-P25) Atsushi Nakano et al. Kyoritsu Shuppan 1988

  Reactive oxygen species are known to be extremely oxidative and cause illnesses such as aging and vascular disorders associated with lipid peroxides. However, the action of oxidative decomposition of various organic substances is also attracting attention. Therefore, the present inventor thought that the radical reaction of active oxygen species acting in high energy could be utilized for PCB dechlorination. That is, PCB is decomposed into hydrocarbon, hydrogen chloride, and the like by radical active oxygen species created by an air electronic device. Based on its originality, the present inventor considered that the air electronic device devised by the present inventor can be used for dechlorination of PCB. Therefore, when the computerized air generated by the present inventors was used to blow the computerized air generated on the PCB to the PCB, it was found that it was decomposed and gasified at around 200 ° C. It was.

  As is well known, PCB which is stable against heat and chemically stable does not decompose at a temperature of about 200 ° C. In order to decompose it with heat, it must be heated to 350 ° C. or higher. In particular, a combustion temperature of 600 ° C. or higher is necessary for combustion, and a high temperature of 800 ° C. or higher is required to make the combustion gas contain no dioxin (Reference Document 2).

  Reference 2: Research on production of dioxins in fluidized bed incinerator, Transactions of the Japan Society of Mechanical Engineers, B (2001), Vol67, No664, Masakatsu Hiraoka, Fukuzen Yoshihara, Kazuhiro Nishiwaki and others

  That is, in order to thermally decompose and dechlorinate thermally stable PCB, it must be based on supercritical treatment, alkali treatment, photochemical reaction, plasma irradiation reaction, etc. under high temperature and high pressure. The equipment needed to be constructed with high temperature, high pressure, highly concentrated alkaline agent, photochemical reaction, special metal that can withstand plasma irradiation. However, if the PCB can be dechlorinated and oxidatively decomposed at a low temperature of about 200 ° C. according to the present invention, the reaction apparatus can be made of a hot rolled mild steel plate (iron plate) or stainless steel plate having a thickness of about 2 mm to 6 mm. Made.

  In the present invention, a cylindrical closed container made of an iron plate or the like is used as a reactor, a fluid medium is placed inside the reactor, a stirrer for stirring the fluid medium is attached, and a perforated plate is placed on the bottom of the reactor. A box-type hearth was installed, and the electronic air supplied from the computerization device devised by the present inventor and the water vapor supplied from the steam generator were mixed and heated inside the hearth, and the heated The reaction apparatus has a structure in which the air-fuel mixture (active air) is supplied from the perforated plate to the reactor.

  In this reaction apparatus, when a liquid PCB to be treated is dropped into the reactor while stirring the fluid medium, the PCB is hydrolyzed by the active air heated to around 200 ° C. supplied from the perforated plate of the reactor. Gasify.

According to the present invention, the hard-to-decompose PCB can be hydrolyzed by the active air (mixture of digitized air and water vapor) heated to around 200 ° C. by placing PCB in the reactor. The method for hydrolyzing the PCB is to break the molecular bond (covalent bond) of the PCB with an active oxygen species such as singlet oxygen. Singlet oxygen is generated by irradiating oxygen molecules with ultraviolet rays or lines of magnetic force, but when free electrons are added to the singlet oxygen, it becomes superoxide (• O ₂ ⁻ ), and when hydrogen ions are added to superoxide, hydrogen peroxide is generated. becomes _(H 2 _{O 2),} it is known that hydroxyl radical (HO ^·) is generated (Ref.1).

  Material 1: Reactive oxygen species, Environmental purification by singlet oxygen, Kure Regional Open College Network Conference, Regional Activation Research Report (2004), Hiroshima University Graduate School of Science, Department of Biological Production, Yuichiro Mase, Tokunoku Yuichi, Fujimura Ayako, Ono Ayumu and others

Superoxide (· _{O 2} ^-) and hydroxyl radical (HO ^·) is the oxidizing power is very strong active oxygen species. The oxidizing power is a radical reaction that occurs due to the high energy level of oxygen electrons, and is a covalent bond between carbon and carbon (C—C, C═C, C≡C), which is a bonded form of PCB, and carbon and hydrogen. The covalent bond (C—H) and the covalent bond of carbon and chlorine (C—cl) are dissociated at a low temperature.

In the method of the present invention, the hardly decomposable PCB is decomposed due to the strong oxidizing power of the digitized air produced by the air digitizer. In particular, superoxide (· O 2 ^_-) is oxidizing power and mixing steam very strong hydroxyl radical (HO ^·) is generated electronic air contains, in the present invention are deliberately produced the mechanism , hydroxyl radicals persistent of PCB becomes (HO ^·) produced in the reactor is assumed to be degraded.

  1 and 2 are schematic views showing an embodiment of the present invention.

  In FIG. 1, a stirrer 2 to which a stirring blade 3 is fixed is attached to a reactor 1 manufactured in a cylindrical shape with a mild steel plate (iron plate) or a stainless steel plate. Then, a hearth 7 covered with a perforated plate 4 is attached to the bottom of the reactor 1. Further, the air (b) supplied from the blower 8 is converted into digitized air (b) through the electronic device 9 and introduced into the hearth unit 7, and the water vapor (ni) supplied from the steam generator 10 is added. ) Is mixed inside the hearth unit 7, a heater 6 is attached inside the hearth unit 7, and the air-fuel mixture is heated to around 200 ° C. to become active air (e). The structure is blown up to 1.

  When the inside of the reactor 1 is filled with the fluidized medium 5 and the fluidized medium is agitated with the agitator 2, PCB (g) stored in the storage tank 13 is quantitatively dropped into the reactor 1 with the pump 14. The PCB is absorbed by the fluid medium 5.

  In the electronic device 9, a discharge needle 16 and a facing electrode 17 are fixed to a discharge tube 18 made of a non-conductive material. An air core bobbin 19 around which an electromagnetic coil 20 is wound is connected to and integrated with the tip of the discharge tube 18. Then, the high voltage power supply device 21 is connected to the discharge needle 16 and the facing electrode 22, and the current power supply device 22 is connected to the electromagnetic coil 20.

  In this embodiment of the electronic device 9, when a high voltage of several tens of thousands of volts is applied to the discharge needle 16 and a current of several amperes is sent to the electromagnetic coil 20, air (b) is fed in, and the discharge needle is multiplied by the air flow The free electrons radiated from 16 are exposed to a magnetic field generated from the electromagnetic coil 20 in the process of passing through the air core bobbin 19, and are subjected to the action of magnetic field lines that go straight through the center of the air core bobbin 19 along the air flow. As a result, the electromagnetic induction causes a state of intense spin, and the oxygen molecules in the air are electromagnetically excited to generate electronic air (B) containing active oxygen species such as singlet oxygen.

  In order to generate active oxygen species by the electronic device 9, it is necessary to blow an air flow violently against the discharge needle 16, but in this electronic device, with the flow of air (A) supplied from the blower 8, It has been achieved.

性酸素の酸化力は、非ラジカル状態の磁化空気よりも酸化力が強いものである（資料２）。The active oxygen species generated from the electronic device 9 is singlet oxygen containing a large amount of free electrons, but is different from the singlet oxygen species generated by attaching a permanent magnet to the conduit. Air excited by a permanent magnet is commonly called magnetized air and is a non-radical oxygen molecule. That is, when viewed from the electronic structure of the molecule, oxygen molecules in the ground state in the air is triplet oxygen molecules, the outermost orbital electrons unpaired electrons of oxygen molecules by the magnetic field lines _{^{(1) (3 Σ g -}} ) of a pair Electronic

The oxidizing power of reactive oxygen is stronger than that of non-radical magnetized air (Document 2).

Document 2: Electronic structure of oxygen atom and oxygen molecule, cited document: oxygen electronic structure (2003)
(Http://members.jcom.home.ne.jp/chiekamada/sansodensikozoh.htm)

In the present invention, water vapor is further added to the digitized air. The purpose is to produce hydrogen peroxide (H ₂ O ₂ ) -like active oxygen by adding hydrogen ions (water vapor) to superoxide (O _2. ⁻ ). As hydrogen peroxide, hydroxyl radicals and most oxidizing power in the active oxygen species when acted on by heavy metal ions such as iron is a strong (HO ^·) is generated. In the present invention, it will be filled with the fluid medium 5 in order to absorb the PCB to the reactor 1, the hydroxyl radical (HO ^·) is devised to be produced by mixing the ferrous oxide to the fluid medium .

  In general, in a reaction apparatus involving a chemical reaction, a stainless steel plate is used in consideration of corrosion resistance, but the material of the reactor 1 may be made of iron. As an advantage of the present invention, hot rolled steel or cold rolled steel (iron plate) can be used. Since hydrolysis of PCB generates hydrogen chloride, corrosion resistant metals such as titanium and tantalum are usually used in consideration of the corrosivity of hydrogen chloride. However, according to the present invention, the corrosivity of hydrogen chloride is reduced. The reason is unknown, but in fact, it has experienced that it can withstand operation for several months with a reaction solution operation at around 200 ° C. Further, the reactor 1 may have a cylindrical shape or a square shape, and may have a horizontal or vertical structure.

  The porous plate 4 holds the fluid medium 5 filled in the reactor 1 and plays a role of diffusing and blowing up the active air (e) supplied from the hearth from the bottom of the reactor 1 to the entire region. Is. The shape may be any shape as long as it is a structure that can support the fumes of active air (e) and the fluid medium 5. Further, the size, shape, number, material, etc. of the holes to be opened in the perforated plate 4 are not defined.

  The fluid medium 5 may be a porous ceramic ball obtained by granulating siliceous clay and sintering. The kind and particle size are not limited.

  The temperature adjustment of the reactor 1 may be provided with a temperature adjustment function for attaching a temperature indicator controller to the reactor and operating the heater 6 according to the temperature indicator.

  In order to prevent a temperature drop inside the reactor, a heat insulating material 12 is applied. The kind and thickness of the heat insulating material are not limited.

  An object of the present invention is to hydrolyze chemically stable PCB at a low temperature around 200 ° C. to dechlorinate and gasify the PCB. According to the present invention, PCB receives the strong oxidizing power of active oxygen species, and the polychlorinated biphenyl structure in which two molecules of the hexacyclic benzene nucleus, which is the skeleton structure of PCB, is bonded, is destroyed, and carbon dioxide, methane, ethane, ethylene Become gaseous substances such as methanol, ethanol, aldehyde, ketone, hydrogen chloride. As a result, the dioxin structure is destroyed and the dioxin content is reduced. Depending on the type and concentration of PCB to be processed, up to about 1000 μg I-TEQ is processed. Therefore, the gasified PCB processed product cannot be directly released into the atmosphere. In order to make it harmless, it is necessary to carry out post-processing with a combustion device or the like.

  Organic chlorine compounds and low-concentration dioxin-containing materials can be rendered harmless by incineration. Dioxin generation mechanism has been studied by many researchers. According to the research results, dioxins are not produced even if vinyl chloride containing a large amount of chlorine is completely burned (Reference 3).

  Reference 3: Research on elucidation of generation behavior and control technology of dioxins associated with incineration of industrial waste (National Institute for Environmental Studies [2001]), Akio Yasuhara, Shunji Hashimoto, Kuninaka Nakamiya

The national special measures law for dioxins stipulates that businesses that install incinerators must be notified and comply with emission standards. According to the law, dioxins in the exhaust gas of an incinerator that treats waste are determined by the capacity of the incinerator. When the capacity is 4 tons / hour or more, 0.1 ng-TEQ / Nm ³ , 2 1 ng-TEQ / Nm ³ in the case of more than ton / hour and less than 4 ton / hour, and 5 ng-TEQ / Nm ^{3 in the} case of less than 2 ton / hour.

  According to the previous document (reference document 2), the generation of dioxins is mainly due to incomplete combustion in the incinerator and is not dependent on the chlorine content in the waste. For example, even if the chlorine (cl) content in the waste is 0.04%, dioxins are generated in the combustion state where carbon monoxide (CO) peaks occur frequently, and the cl content is 2%. The generation of dioxins is also suppressed by suppressing the generation of CO. In particular, it is said that dioxins are not generated in complete combustion combusted with excess air and high-temperature combustion at 800 ° C. or higher. From such a technical background, the proper operating conditions of the incinerator specified by the country are a temperature of 800 ° C. or more, a combustion residence time of 2 seconds or more, sufficient mixing with air (air excess ratio λ: 2 or more), and The guidelines for administrative guidance are to rapidly cool the combustion gas after incineration to 200 ° C. or less and to collect fly ash discharged by incineration with a bag filter or the like.

  In view of such a situation, the method of post-processing the gasified substance generated after decomposing PCB is a method of performing secondary combustion while maintaining a combustion temperature of 800 ° C. or higher. Since this patent is aimed at decomposition and gasification of PCB, the subsequent processing is not limited to a specific method, but as an example, FIG. 3 shows the processing method.

In FIG. 3, a combustor body 25 composed of an electric heater 26, a platinum catalyst 27, and a secondary combustor 28 is provided. The PCB decomposition gas (nu) treated in the reactor 1 is introduced into this and burned while maintaining a combustion temperature of 800 ° C. or higher and a combustion residence time of 2 seconds or longer. Next, the combustion gas (le) is guided to the ejector 29, and is quickly cooled by the cleaning solution (ta) ejected from the cleaning pump 31 for cleaning. The cleaning tower 30 is replenished with chemicals (le) and water (chemical) for chemically cleaning the combustion gas (le). For chemical cleaning (re), caustic soda (NaOH) that neutralizes hydrogen chloride (Hcl) contained in combustion gas (le) is mainly used. Further, the cleaning gas (e) treated in the washing tower 30 is guided to the dust collector 33, and the dust contained in the washing gas (e) is captured by the bag filter 34 provided inside. Then, the processing gas is exhausted from the exhaust tower 35 to the atmosphere as exhaust (wa).
"Effect of the embodiment"

  According to this embodiment, the PCB dropped into the reactor 1 is hydrolyzed by the strong oxidizing power of the active air (e) made by mixing the electronic air (b) and the water vapor (d), and is in the form of a gaseous reaction gas. It becomes (f). In this reaction, when the fluidized medium 5 is warmed by activated air (e) heated to around 200 ° C. and PCB is dropped from the pump 15, the dropped PCB is absorbed by the fluidized medium 15. In contact with warm activated air (e), a Fuenton reaction occurs in the presence of ferrous ions, and the bond between the biphenyl group of PCB and chlorine (cl) is broken, resulting in free hydrocarbons. , Carbon dioxide, hydrogen chloride (Hcl) and the like.

  The first effect of the present invention is that PCB can be decomposed at a low temperature of around 200 ° C. PCBs that were not decomposed at temperatures below 400 ° C can be hydrolyzed to carbon dioxide, hydrocarbons, and hydrogen chloride at temperatures as low as around 200 ° C, which destroys the chemical structure of the highly toxic PCB and reduces toxicity. Can be made. Then, the hydrolyzed gaseous substance is incinerated at a high temperature of 800 ° C. or higher, the incinerated gas is cooled with water, washed, and further collected with a bag filter to collect dioxins contained in the combustion gas. Concentrations can be reduced to the national standard value for waste incinerators, which can be released into the atmosphere.

  Another effect of the present invention is that in the present invention, which can be operated at a low temperature of about 200 ° C., the reactor 1 and the like can be manufactured from an inexpensive material such as an iron plate that is easy to process. As a result, the manufacturing cost is lower than that of expensive devices that are made considering conventional high temperature, high pressure, chemical resistance, etc., and the manufacturing cost has been reduced, which has hindered the spread of this type of device. Can be planned.

The reaction gas (f) generated by the hydrolysis of PCB contains several hundreds of PPM of hydrogen chloride. Since such reactive gases are highly corrosive, they cannot be used with steel sheets made of steel, but have a track record of enduring a half-year demonstration test in which waste vinyl chloride was treated. The reason why it was not corroded is not clear, but because there is a fact that it was actually tolerated, the cause can be guessed because of the strong reducing action brought about by digitized air containing a large amount of electrons or by reaction Since the tar-like substance to be applied covers the surface of the iron plate, it is expected that the anticorrosive effect brought about by the coating action.
"Other embodiments"

  As shown in the embodiment of FIG. 1, the present invention uses the air electronic device of utility model registration certificate No. 3133388 already invented by the present inventor. However, if the device has a function of generating active oxygen species having strong oxidizing power such as digitized air containing free electrons, singlet oxygen, superoxide, hydroxyl radical, etc., it produces the same form and function as the present invention. be able to. An electronic device having such a function may be used in the embodiment in place of the electronic device 9 of the present invention. In that case, it is necessary to attach a heating device such as an electric heater so that the active air (e) blown from the perforated plate 4 attached to the reactor 1 is heated to around 200 ° C.

  In the apparatus according to the present invention, a stirrer 2 is attached to the inside of the reactor 1, but the structure of the stirring blade 3 of the stirrer 2 is not a flat plate structure as shown in FIG. 1, but a flow of screw type, paddle type, rod type, etc. Any form may be used as long as the medium 5 is agitated. Moreover, the structure which the reactor 1 rotates like a rotary drum may be sufficient, and the type which repetitively moves may be sufficient.

  The PCB dropped into the reactor 1 may not be liquid, but may be tangible such as a small capacitor (electric part). In that case, the tangible material may be crushed or the tangible material may be put into the reactor 1 as it is. In order to take out the treated product remaining in the form from the reactor 1 to the outside of the system, an outlet may be provided on the side of the reactor 1.

  In order to promote the reaction, organic substances other than PCB (such as crushed plastics and crushed woods) may be charged into the reactor 1. Further, polyvinyl chloride (PVC), which is a similar chlorinated compound, can be charged and simultaneously processed. Furthermore, it can be applied to the decomposition treatment of other organic chlorine compounds such as polyurethane (PU), polycarbonate (PC), pentachlorophenyl (PCP), polyvinylidene chloride (PVDC), and vinyl chloride monomer (VCM).

  When the PCB was processed under the conditions of the material 1 using the test apparatus having the structure shown in FIG. 1 and FIG. 3, the result as the material 2 was obtained (the material 3 and the material 4).

  Appendix 3: Test equipment operating conditions

  Document 4: Dioxin analysis results

In this test, it was not possible to treat PCBs that were strictly controlled and treated legally, so we collected old electrolytic capacitors that were used as insulating oil and used them. As it was, it was mixed with the crushed PVC material and processed. In order to confirm the effect, a small amount of the material charged into the reactor prior to the test was collected and baked (650 ° C.) in an electric furnace for testing. As a result, black smoke was generated. The smoke was collected and the amount of dioxin contained in the smoke was measured (JIS K 0311-1999). As a result, the measurement limit value (10,000 ng-TEQ / Nm ³ ) was exceeded. When it was processed by the method of the present invention, the exhaust (wa) exhausted from the exhaust tower 35 of the combustor 15 was analyzed, and dioxins were found to be standard facilities (0.1 ng-TEQ / Nm) of the atmospheric standard value. ³ ) It was the following.

  PCBs and PCB-containing waste are obliged to be stored safely by the user until the country decides on the countermeasures. For some time, the disposal of waste containing PCBs and treatment standards have not been publicly defined. However, as a result of a study on safe countermeasures 19 years ago, the diversification of treatment methods was recognized and commercial Today, today, the process has been carried out experimentally with the aim of proving practical processing technology. The present invention has been developed in view of such a public situation, and has been developed with the aim of spreading inexpensive and handy devices. This is a significant improvement over the current situation where PCBs are stored, moved, and processed in large amounts. In particular, this is one method that can embody countermeasures by the generator, which is a major principle of waste disposal. Judging that there is.

  It is a schematic diagram showing one embodiment of the present invention.   It is structural drawing which shows the form of the air electronic apparatus.   It is a schematic diagram which shows the incinerator of the reactive gas used for the post-process of this invention.

DESCRIPTION OF SYMBOLS 1 Reactor 2 Stirrer 3 Stirring blade 4 Perforated plate 5 Fluid medium 6 Heater 7 Furnace 8 Blower 9 Electronic device 10 Steam generator 11 Drive 12 Heat insulating material 13 Reservoir 14 Pump 15 Combustor 16 Discharge needle 17 Counter electrode 18 discharge tube 19 air core bobbin 20 electromagnetic coil 21 high voltage power supply device 22 current power supply device 23 intake tube 24 air supply tube 25 combustor body 26 electric heater 27 platinum catalyst 28 secondary combustor 29 ejector 30 cleaning tower 31 cleaning pump 32 blower blower 33 Dust collector 34 Bag filter 35 Exhaust tower B Air B Electronic air C Water D Steam E Activated air Reactive gust PCB
H Reactant gas Exhaust gas Decomposition gas Combustion gas E Cleaning gas exhaust Exhaust water Feed water Wash water T Cleaning solution Chemical solution Cleaning fluid

Claims (4)

    In a method for dechlorination by decomposing PCBs at a low temperature of around 200 ° C. with computerized air containing activated oxygen species, the reactor is equipped with a fluid medium and a stirrer, and air is irradiated with free electrons for digitization. An electronic device for producing air, a hearth furnace for making active air by mixing water vapor into the electronic air, a heater for raising the temperature of active air to around 200 ° C., storing PCB and supplying it to the reactor A PCB gasifier.     2. The PCB gasification apparatus according to claim 1, wherein water is added to the computerized air supplied from the computerization apparatus while stirring at about 200 ° C. while the reactor is filled with a fluid medium and iron or an iron compound is added to the reactor. A method of treating PCBs, comprising heating activated water to produce activated air, blowing the activated air into the reactor, and hydrolyzing and gasifying the PCB thrown into the reactor.     In the PCB processing according to claim 2, gasified PCB decomposition products are incinerated at a high temperature of 800 ° C. or higher, the incineration gas is quenched with water and washed with water, and the cleaning gas is dedusted with a bag filter. By doing so, the concentration of dioxins in the exhaust gas can be reduced to the atmospheric standard value of a waste incinerator set by the government.     A method for treating a chlorine-containing organic substance, wherein the chlorine-containing organic substance is gasified by the treatments of claim 1, claim 2 and claim 3 and detoxified, for example, by incineration.

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