JP6259739B2 - Hazardous substance decomposition apparatus, combustion gas decomposition system, and vaporized gas decomposition system - Google Patents

Description

  The present invention relates to a harmful substance decomposition apparatus, a combustion gas decomposition system, and a vaporized gas decomposition system for decomposing gaseous harmful substances harmful to humans and animals.

  Examples of gaseous harmful substances include volatile organic compounds. The volatile organic compounds include acyclic and cyclic hydrocarbon compounds containing no halogen, and acyclic and cyclic organic halogen compounds containing halogen. In this organohalogen compound, specific examples of the gaseous organohalogen compound include gas in which PCB (Polychlorinated Biphenyl) is vaporized, gaseous dioxin in which PCB is burned, and DDT (Dichloro diphenyl trichloroethane: dichloromethane). Examples include diphenyltrichloroethane, organochlorine insecticides, agrochemicals) in the form of gas.

  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 have been used in large quantities in a wide range of fields regardless of their use as insulating oils such as transformers and capacitors, plasticizers such as electric wires, and heat media in various processes such as various chemical industries.

  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 widely used due to their versatility, and now PCB processing and disposal can be done harmless to humans. Has been sought.

  That is, when a normal incineration process is performed to treat or dispose of PCBs, the incineration temperature is low in the normal incineration process, and thus gaseous harmful substances such as dioxins are generated. Is released into the air, causing further air pollution. For this reason, the PCB cannot be easily processed and disposed of, and the actual situation is that the local government or the like stores the collected PCB in a storage as a special management substance.

  Also in DDT, it has been found that degradation products of DDT (DDE, DDA) are very difficult to decompose in the environment and bioconcentrate through the food chain, and production and sales are currently prohibited in Japan. However, DDT remains in the soil and the like due to its high versatility, and treatment and disposal are required in the same way as PCB, but it is difficult to treat and dispose of it.

  Therefore, a decomposition processing device described in Patent Document 1 has been proposed. The decomposition processing apparatus decomposes gaseous organic halogen compounds (harmful gases) and the like at high temperatures. This decomposition processing apparatus has an elongated cylindrical shape, and a thermal decomposition means (also referred to as a cylinder) in which a circular tube through which harmful gas flowing in from one opening flows out from the other opening is formed using a metal cylinder. ) Is inserted inside.

  The gas outflow side of the cylinder is closed, and a plurality of slits through which gas escapes are formed on the outer peripheral surface. A high frequency coil is disposed on the outer periphery of the cylinder, and a vacuum pump is disposed on the gas outlet side of the circular tube. Furthermore, the space from the inlet end of the circular tube to the suction side of the vacuum pump through the high-frequency coil and the thermal decomposition means is covered and sealed with a housing, and the interior of the housing is kept in a vacuum state by the suction of the vacuum pump. It has come to be.

  In such a configuration, a high-frequency current is passed through the high-frequency coil to inductively heat the thermal decomposition means, and harmful gas flows into the circular tube while being sucked by a vacuum pump. The inflowing harmful gas contacts or passes the inner surface of the thermal decomposition means (cylinder), and at this time, it is thermally decomposed by contact thermal decomposition and radiant heat to become harmless decomposition gas. Furthermore, the cracked gas is discharged from the cracking apparatus by suction of a vacuum pump. This flow decomposes harmful gases such as gaseous organic halogen compounds.

Japanese Patent Laid-Open No. 2003-33645

  By the way, metals such as molybdenum, SUS, and incoloy for high frequency induction are used for the metal cylinder of the thermal decomposition means. These metals may oxidize and deteriorate when exposed to oxygen. Therefore, as described above, the thermal decomposition means is sealed with a casing, and the inside is held in a vacuum state by a vacuum pump. However, the vacuum-tight airtight structure requires a dense structure in order to block oxygen, and it is necessary to operate a vacuum pump when the apparatus is in operation. For this reason, there is a problem that the structure of the entire apparatus becomes complicated and the manufacturing cost and running cost increase.

  The present invention has been made in view of such a background. The entire apparatus can have a simple structure, and can be reduced in manufacturing cost and running cost. It is an object to provide a vaporized gas decomposition system.

In order to solve the above-described problem, the harmful substance decomposition apparatus according to claim 1 of the present invention generates a coil that is supplied with a high-frequency current from a power source, and is induction-heated when the high- frequency current is supplied to the coil . the block-shaped conductive ceramic having at least 1350 ° C. or higher heat resistance, and thermal decomposition means disposed so as voids in a cylindrical housing is formed along the inner peripheral surface of the housing, before Symbol A plurality of columnar members having at least the heat resistance disposed in a state of being surrounded by block-shaped conductive ceramics, an introducing means for introducing a gaseous organic halogen compound from one end side of the casing , and the casing And a discharge means for discharging the gas from the other end side .

According to this configuration, the conductive ceramic heats up to a temperature at which harmful gases can be decomposed harmlessly by induction heating, the harmful gases are introduced into the thermal decomposition means from the introduction means, and the introduced harmful gases are made conductive. It is decomposed by the heat of the ceramics, and the decomposition gas can be discharged from the discharge means. Since conductive ceramics as thermal decomposition means do not oxidize even when exposed to oxygen, conventional metal thermal decomposition means such as molybdenum, SUS, and incoloy are enclosed in a casing and sealed, and the inside is vacuum pumped Therefore, an airtight structure such as holding in a vacuum is not necessary. In other words, since an airtight structure that maintains a vacuum is not necessary, the harmful substance decomposition apparatus can be realized with a simple structure. In addition, since a low-power blower or a general pump is sufficient instead of a high-power vacuum pump, manufacturing costs and running costs can be kept low.
Further, the harmful gas introduced from the introduction means to the thermal decomposition means passes while contacting or colliding with the plurality of block-shaped conductive ceramics, so that it is easily decomposed at a higher temperature at the time of contact or collision.
Furthermore, since the block-shaped conductive ceramics are surrounded and accommodated by a plurality of columnar members having a heat resistance higher than a predetermined value (above the decomposition temperature), the casing outside each columnar member is made of conductive ceramics. It can be protected from melting by high heat. For this reason, a housing | casing can be manufactured with the low-cost material which is easy to process.

A combustion gas decomposition system according to claim 2 comprises the harmful substance decomposition apparatus according to claim 1 and an incineration means for burning the contents of the harmful substance and generating a combustion gas containing the harmful gas during the combustion. And the combustion gas generated by the incineration means is introduced into the thermal decomposition means through the introduction means.

  According to this structure, there exist the following effects. In the conventional thermal decomposition means, since oxygen oxidizes and deteriorates the heating element, thermal decomposition treatment cannot be performed in a state where harmful gas and oxygen are mixed. For this reason, the system which burns the content of the harmful substance by the incineration means and introduces the combustion gas containing the harmful gas at the time of combustion into the thermal decomposition means in a state where oxygen is mixed cannot be realized. However, in the present invention, since the conductive ceramic that is the heating element of the thermal decomposition means does not oxidize, it is possible to realize a system that introduces combustion gas from the incineration means into the thermal decomposition means in a state where oxygen is mixed.

Vaporized gas decomposition system according to claim 3, the hazardous substances decomposition apparatus according to claim 1, heat treating the content of toxic substances, the heat treatment means vaporized gas containing harmful gas when the heat treatment is generated And the vaporized gas generated by the heat treatment means is introduced into the thermal decomposition means via the introduction means.

  According to this structure, there exist the following effects. In the conventional thermal decomposition means, since oxygen oxidizes and deteriorates the heating element, it is impossible to introduce the vaporized gas from the heat treatment means in a state where oxygen is mixed. For this reason, it is necessary to enclose the heat treatment means and to fill the inside with a vacuum or an inert gas, which is expensive. However, in the present invention, since the conductive ceramic that is the heating element of the thermal decomposition means does not oxidize, it is possible to realize a system for introducing the vaporized gas from the heat treatment means into the thermal decomposition means in a state where oxygen is mixed. . For this reason, the cost of manufacturing and operating the system can be reduced.

  According to the present invention, it is possible to provide a harmful substance decomposition apparatus, a combustion gas decomposition system, and a vaporized gas decomposition system that can make the entire apparatus a simple structure and can reduce manufacturing costs and running costs.

(A) shows the configuration of the hazardous substance decomposition apparatus according to the embodiment of the present invention, (b) is a cross-sectional view of A1-A1 shown in (a), and (c) is a view of the conductive ceramics of the hazardous substance decomposition apparatus. It is sectional drawing which shows the aspect which provided the life ring in the wall surface. It is a block diagram which shows the control structure of the harmful substance decomposition | disassembly apparatus of this embodiment. (A) is a side view showing the external configuration of the thermal decomposition means of Modification 1 of this embodiment, b) is a perspective view showing the mounting structure of a plurality of cylindrical ceramics of the thermal decomposition means, (c) is (a) It is A3-A3 sectional drawing shown to). (A) is a side view which shows the external appearance structure of the thermal decomposition means of the modification 2 of this embodiment, (b) is A2-A2 sectional drawing shown to (a). It is the perspective view made into the partially broken cross section which shows the structure of the thermal decomposition means of the modification 3 of this embodiment. (A) is A5-A5 sectional drawing shown in FIG. 5, (b) is A6-A6 sectional drawing shown to (a). It is a figure which shows the structure of the combustion gas decomposition | disassembly system as the application example 1 using the harmful substance decomposition | disassembly apparatus of this embodiment. It is a figure which shows the structure of the vaporization gas decomposition | disassembly system as the application example 2 using the harmful substance decomposition | disassembly apparatus of this embodiment.

Next, an embodiment of the present invention (hereinafter referred to as “embodiment”) will be described.
<Configuration of Embodiment>
1A shows a configuration of a hazardous substance decomposition apparatus according to an embodiment of the present invention, FIG. 1B is a cross-sectional view of A1-A1 shown in FIG. 1A, and FIG. It is sectional drawing which shows the aspect which provided the life ring in the inner wall face of ceramics.

  The harmful substance decomposition apparatus 10 shown in FIG. 1 (a) includes vaporized gas obtained by vaporizing PCB, dioxin obtained by burning PCB, gaseous organic halogen compounds such as gaseous DDT, and various other harmful gases. The harmful gas is thermally decomposed by heating at a high temperature to form 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 substance decomposition apparatus 10 includes a cylindrical conductive ceramic 11, an induction heating coil 12, a gas introduction pipe 14a, a gas discharge pipe 14b, open / close valves 15a and 15b, a suction device 16, and a water scrubber 17. The activated carbon filter 18 and an AC power source (power source) 19 are provided. The induction heating coil 12 is also simply referred to as a coil 12.

  The gas introduction pipe 14a constitutes the introduction means described in the claims, and the gas discharge pipe 14b and the suction device 16 constitute the discharge means described in the claims.

  The gas introduction pipe 14a and the gas discharge pipe 14b form a circular tube having a predetermined length, and allow harmful gas or decomposition gas to pass through the circular tube. The material of the gas introduction pipe 14a and the gas exhaust pipe 14b is a material that has characteristics such as induction heating that is not or is difficult to be performed, high heat resistance, and low thermal stretchability (this characteristic is referred to as thermal characteristics). If there is no particular limitation. Examples of this material include glass, general ceramics, and alumina. For example, each tube 14a, 14b may be alumina.

  As shown by the arrow Y1, the gas introduction pipe 14a is inflow (or introduction) of harmful gas from one end side, the other end side is connected to the inlet side of the conductive ceramic 11, and opens and closes between the one end side and the other end side. A valve 15a is provided.

  One end side of the gas exhaust pipe 14 b is connected to the outlet side of the conductive ceramic 11. Between the one end side of the gas discharge pipe 14b and the other end side where the cracked gas (described later) indicated by the arrow Y2 is discharged, the opening / closing valve 15b, the suction device 16, A water scrubber 17 and an activated carbon filter 18 are arranged at predetermined intervals.

  The connection between the gas introduction pipe 14a and the gas discharge pipe 14b and the conductive ceramic 11 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 16 performs an operation of sucking gas from the gas discharge pipe 14b side toward the gas introduction pipe 14a. That is, as shown by an arrow Y1 from the inlet of the gas introduction pipe 14a, a gas such as harmful gas or air is sucked, and the sucked gas passes through the conductive ceramic 11 and is discharged from the outlet of the gas discharge pipe 14b (arrow Y2). ) To perform a suction operation. A blower, a standard pump other than a vacuum pump, or the like is applied to the suction device 16. Note that the suction device 16 may be disposed on the inlet side of the conductive ceramic 11.

  Each of the open / close valves 15a and 15b is an electromagnetic valve that performs an open / close operation with an electromagnetic force. The internal passages of the gas introduction pipe 14a and the gas discharge pipe 14b are in a shielded state when the valve is closed and in an open state when the valve is open. When the suction device 16 performs a suction operation when both the open / close valves 15a and 15b are opened, harmful gas flows in the direction indicated by the arrow Y1 from the inlet of the gas introduction pipe 14a and passes through the conductive ceramic 11. The decomposition gas decomposed at the time of passage flows through the gas discharge pipe 14b, passes through the suction device 16, the water scrubber 17 and the activated carbon filter 18 and is discharged from the discharge port to the atmosphere in the direction indicated by the arrow Y2. On the other hand, when the open / close valves 15a and 15b are closed, the gas introduction pipe 14a and the gas discharge pipe 14b are shielded by the open / close valves 15a and 15b, and harmful gas and decomposition gas are shut off.

  As shown in FIGS. 1A and 1B, the induction heating coil 12 is configured by winding a conductive wire a predetermined number of times in a circumferential direction via a gap G having a predetermined interval, as shown in FIGS. Yes. Both ends of the coil 12 are connected to the positive electrode and the negative electrode of the AC power source 19. The AC power supply 19 supplies a high frequency current to the coil 12.

  However, the coil 12 may be arranged in another manner in the vicinity of the conductive ceramic 11 as long as the coil 12 has a function of induction heating the conductive ceramic 11. For example, the coil 12 may be a planar coil in which a conducting wire is wound into a flat circular shape or an elliptical shape, a meandering coil in which the conducting wire is meandered in a plane, or the like. You may arrange | position through a gap.

  The conductive ceramic 11 is a thermal decomposition means 13 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 from the AC power source 19 to the coil 12, an eddy current (inductive current) is induced in the conductive ceramic 11, and Joule heat is generated from the induced current toward the inside from the outer peripheral surface. Heated. The entire conductive ceramic 11 becomes high temperature due to the 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 11, that is, up to about 3000 ° C.

  In the present embodiment, the internal space of the conductive ceramic 11 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.

  The conductive ceramics 11 harmlessly decomposes harmful gas passing through the interior at the decomposition temperature. At this time, contact pyrolysis is performed in which harmful gas molecules are brought into contact with the inner wall of the internal space of the conductive ceramic 11 and decomposed. Two types of thermal decomposition are performed, ie, radiation pyrolysis, which is caused to pass through the internal space and decompose by radiant heat. The conductive ceramic 11 is preferably heated so that the temperature of radiation pyrolysis becomes the decomposition temperature. Harmful gas molecules are more likely to be decomposed by catalytic pyrolysis because they are heated to a higher temperature. Therefore, the inner diameter of the conductive ceramic 11 is such that when harmful gas passes through the internal space, more molecules of harmful gas (a predetermined amount or more of harmful gases) pass while contacting or colliding with the inner wall. Is preferable.

  If the inner diameter of the conductive ceramic 11 is too large, the number of molecules of harmful gas that contacts or collides with the inner wall decreases. This is because molecules such as dioxins of harmful gas passing through the inside of the conductive ceramics 11 are slightly fluctuated due to high frequency induction, and if the inner diameter of the conductive ceramics 11 is large, it returns to the center side and becomes difficult to collide. Because. In this way, when the harmful gas molecules are difficult to collide, if the length of the conductive ceramic 11 is short, gas components that are not decomposed also appear. Therefore, as described above, if the inner diameter of the conductive ceramic 11 is reduced or the length of the conductive ceramic 11 is increased, it can be properly disassembled.

  Further, the decomposition temperature of the conductive ceramic 11 can be set in a range from the lowest temperature to about 3000 ° C. according to the ambient environment temperature by changing the power when supplying the high frequency current from the AC power source 19. .

  The decomposition temperature can be set by a person manually adjusting the power of the AC power supply 19, but can also be automatically performed as follows. For example, as shown in FIG. 2, a temperature sensor 21 that detects the temperature of the conductive ceramic 11, a temperature setting unit 22 that sets the heating temperature of the conductive ceramic 11, and power control that variably controls the power of the AC power supply 19. And the unit 23. The temperature sensor 21 may be any temperature sensor, thermocouple, radiation thermometer, or the like that can measure high temperatures as described above.

  In the temperature setting unit 22, the heating temperature of the outer peripheral surface for setting the internal space of the conductive ceramic 11 to be equal to or higher than the minimum decomposition temperature necessary for decomposition of harmful gas is set by the operator as the set temperature. It is assumed that the correspondence between the set temperature and the decomposition temperature is known in advance. Next, the temperature of the conductive ceramic 11 is detected by the temperature sensor 21. The power control unit 23 variably controls the power of the AC power supply 19 according to the difference between the detected temperature and the set temperature so that the outer peripheral surface of the conductive ceramic 11 becomes the set temperature.

Further, as shown in FIG. 2, the harmful substance decomposition apparatus 10 includes a valve opening / closing control unit 25 and a suction control unit 26.
The valve opening / closing control unit 25 performs control to open the open / close valves 15a and 15b in the closed state when the temperature detected by the temperature sensor 21 reaches the set temperature. The valve opening / closing control unit 25 performs control to close the open / close valves 15a and 15b when the detected temperature is lower than a predetermined threshold temperature.
However, as the threshold temperature, it is preferable to set the temperature of the outer peripheral surface so that the inner space of the conductive ceramic 11 becomes a minimum temperature (about 1350 ° C.) necessary for decomposition of harmful gas.

  The suction control unit 26 performs control to operate the suction device 16 in the stopped state when the temperature detected by the temperature sensor 21 reaches the set temperature. When harmful gas is introduced into the conductive ceramics 11 by this operation, the power control unit 23 controls the outer peripheral surface of the conductive ceramics 11 to always have a set temperature.

  Further, the hazardous substance decomposition apparatus 10 is controlled to stop as follows. When the operator presses a stop button (not shown) of the harmful substance decomposition apparatus 10, first, the AC power source 19 is turned off. Next, when the temperature of the conductive ceramic 11 is lowered to a temperature lower than a predetermined stop temperature lower than the above threshold temperature due to the turning off, the suction control unit 26 stops the suction device 16 and the valve opening / closing control unit 25. The control is executed by closing the on-off valves 15a and 15b and then turning off the main power supply of the harmful substance decomposition apparatus 10.

  In addition, when the temperature of the conductive ceramics 11 becomes a temperature lower than the stop temperature by a predetermined value or higher than the set temperature for a certain reason during the operation of the harmful substance decomposition apparatus 10, Following the stop control procedure, the main power source of the hazardous substance decomposition apparatus 10 is turned off.

  Each control of the power control unit 23, the valve opening / closing control unit 25, and the suction control unit 26 is performed by, for example, a program stored in a storage unit (not shown) by a CPU (Central Processing Unit) such as a RAM (Random Access Memory). This is realized by deploying to the main memory and executing it.

  The water scrubber 17 shown in FIG. 1 (a) separates and removes harmful components that remain slightly undecomposed in the decomposed gas after the harmful gases are decomposed by the conductive ceramics 11. The water scrubber 17 collects and separates harmful components in the exhaust gas in the droplets or liquid film of the absorption liquid using a liquid such as water as the absorption liquid.

  When residual components such as odor molecules remain without being separated by the water scrubber 17, the activated carbon filter 18 adsorbs and removes the residual component molecules through the fine pores of the activated carbon. The cracked gas after the removal is discharged from the outlet of the gas discharge pipe 14b as harmless and odorless.

<Operation of Embodiment>
Next, the thermal decomposition process of harmful gas by the harmful substance decomposition apparatus 10 according to the embodiment will be described.
First, the operator turns on a main power source (not shown) of the harmful substance decomposition apparatus 10 shown in FIG. Next, in the temperature setting unit 22 shown in FIG. 2, the operator sets the heating temperature of the conductive ceramic 11 as the set temperature. That is, the set temperature of the outer peripheral surface, for example, 1400 ° C., for setting the inner space of the conductive ceramic 11 to the minimum required decomposition temperature (1350 ° C.) is set as the set temperature.

  Next, when the AC power supply 19 is turned on, the power control unit 23 causes the high frequency current to flow from the AC power supply 19 to the coil 12 to inductively heat the conductive ceramics 11. At this time, the detected temperature of the temperature sensor 21 In accordance with the difference from the set temperature, the power of the AC power supply 19 is variably controlled so that the outer peripheral surface of the conductive ceramic 11 becomes the set temperature. As a result, the outer peripheral surface of the conductive ceramic 11 is heated to a preset temperature of 1400 ° C.

  When the detected temperature of the temperature sensor 21 reaches the set temperature, the valve opening / closing control unit 25 performs control to open the open / close valves 15a and 15b in the closed state, and the suction control unit 26 performs the suction device 16 in the stopped state. The control which operates is performed. As a result, harmful gas flows in along with the air from the inlet of the gas introduction pipe 14a as shown by the arrow Y1 and travels toward the conductive ceramic 11.

  When the harmful gas enters the internal space of the conductive ceramic 11, the harmful gas molecules are decomposed by contacting or colliding with the inner wall of the internal space of the conductive ceramic 11, or decomposed by radiant heat in the process of passing through the internal space. Is done. This decomposed cracked gas flows into the water scrubber 17 shown in FIG. 1 while being sucked by the suction device 16.

  In the water scrubber 17, when the harmful gas remains in the cracked gas that has not been decomposed, the harmful component is separated. The separated cracked gas flows into the activated carbon filter 18, where residual components such as residual odor molecules are adsorbed and removed by the activated carbon. The decomposed gas after the removal is discharged together with air as harmless and odorless from the gas discharge pipe 14b as indicated by an arrow Y2.

  After all the harmful gases to be treated are decomposed, the AC power supply 19 is turned off when the operator presses a stop button (not shown) of the harmful substance decomposition apparatus 10. When the temperature of the conductive ceramics 11 decreases below the above threshold temperature due to this off, the suction control unit 26 stops the suction device 16 and the valve opening / closing control unit 25 closes the opening / closing valves 15a and 15b. The main power source of the hazardous substance decomposition apparatus 10 is stopped.

<Effect of embodiment>
As described above, the harmful substance decomposition apparatus 10 according to the present embodiment is arranged in the vicinity of the coil 12 to which the high frequency current is supplied from the AC power source 19 and the coil 12, and is induced when the high frequency current is supplied to the coil 12. Thermal decomposition means 13 using conductive ceramics 11 that generates heat when heated, gas introduction pipe 14a that introduces harmful gas into the thermal decomposition means 13, gas exhaust pipe 14b that exhausts gas from the thermal decomposition means 13, and suction device 16. The conductive ceramic 11 is cylindrical.

  This harmful substance decomposing apparatus 10 is harmful to the inside of the conductive ceramic 11 that has generated heat above the temperature at which the harmful gas can be decomposed harmlessly by induction heating in the coil 12 and is sucked through the gas introduction pipe 14a by the suction of the suction apparatus 16. Gas is introduced, and harmful gas is decomposed into harmless gas (decomposed gas) and discharged from the gas discharge pipe 14b.

  In the present embodiment, the harmful substance decomposition apparatus 10 is manufactured using the conductive ceramic 11 that does not oxidize even when exposed to oxygen as the thermal decomposition means 13 that generates heat to a temperature at which harmful gases can be decomposed harmlessly by induction heating. Therefore, a conventional structure in which metallic pyrolysis means such as molybdenum, SUS, and incoloy is enclosed by a casing and is closed in a vacuum state by a vacuum pump is not required.

  That is, the harmful substance decomposition apparatus 10 of the present embodiment does not require an airtight structure that is maintained in a vacuum state, and accordingly, the hazardous substance decomposition apparatus 10 can be realized with a simple structure. Further, in the hazardous substance decomposition apparatus 10 of the present embodiment, since a low-power blower or a general pump is sufficient instead of a high-power vacuum pump, manufacturing costs and running costs can be kept low.

  Further, the inside diameter of the conductive ceramic 11 may be set to a dimension that allows a molecule of a predetermined amount or more of harmful gas passing through the inside to pass while contacting or colliding with the inner wall.

  According to this configuration, when the harmful gas passing through the inside of the conductive ceramic 11 passes without contact or collision with the inner wall, it is decomposed by radiation pyrolysis, which is lower in decomposition efficiency than contact pyrolysis, so that the decomposition efficiency is high. Low. However, in this configuration, since a predetermined amount or more of harmful gas molecules pass while contacting or colliding with the inner wall of the conductive ceramic 11, decomposition efficiency can be increased.

  Moreover, as shown in FIG.1 (c), the life ring 11a which formed the groove | channel in the inner wall surface of the interior space of the electroconductive ceramics 11 spirally along the inner peripheral direction toward the exit side is provided. May be.

  According to this configuration, the harmful gas introduced into the internal space from the entrance of the conductive ceramic 11 is guided to the exit side while being spirally stirred by the presence of the life ring 11a. For this reason, the chance of contact or collision between the harmful gas and the inner peripheral surface of the conductive ceramic 11 increases, and the harmful gas is decomposed more efficiently by contact pyrolysis.

  In the present embodiment, the coil 12 may be disposed in the vicinity of the conductive ceramic 11. However, in the configuration in which the coil 12 is wound around the outer periphery of the conductive ceramic 11 via the gap G, induction heating is performed. Can be performed more efficiently.

<Modification 1 of thermal decomposition means>
The thermal decomposition means of the modification 1 of the harmful substance decomposition apparatus 10 of this embodiment is demonstrated. FIG. 3A is a side view showing the external configuration of the thermal decomposition means 40 of Modification 1, FIG. 3B is a perspective view showing the mounting structure of a plurality of cylindrical conductive ceramics 42 of the thermal decomposition means 40, and FIG. ) Is an A3-A3 cross-sectional view shown in (a).

  The pyrolysis means 40 shown in FIG. 3A includes a cylindrical casing 41 connected between the gas introduction pipe 14a and the gas discharge pipe 14b, and a plurality of cylinders arranged in the casing 41. And a conductive ceramic material 42.

  The casing 41 is formed of a material having the above-described thermal characteristics. This casing 41 uses two flanges 41a and 41b made of alumina and a cylindrical quartz glass tube 41c provided between the flanges 41a and 41b, and is provided between the gas introduction tube 14a and the gas discharge tube 14b. Are connected in a closed space so that there is no gas leakage.

  Each flange 41a, 41b has a substantially triangular pyramid shape with both ends open, and the small diameter opening side is connected to the open ends of the gas introduction pipe 14a and the gas discharge pipe 14b. The quartz glass tube 41c is connected between the large-diameter open ends of the flanges 41a and 41b.

  The cylindrical conductive ceramic 42 is different from the above-described cylindrical conductive ceramic 11 only in the size of the outer diameter, the inner diameter, and the length, and other properties such as characteristics are the same. The inner diameter of the cylindrical conductive ceramic 42 is such that when harmful gases pass through the internal space, more molecules of harmful gases (more than a predetermined amount of harmful gases) pass while contacting or colliding with the inner wall. It is as.

  Further, the cylindrical conductive ceramic 42 is in a state where the axial direction of the plurality of cylindrical conductive ceramics 42 coincides with the connection direction of the gas introduction pipe 14a and the gas discharge pipe 14b inside the quartz glass tube 41c. As shown in FIG. 3 (b), a plurality of wires are arranged at a predetermined interval. Further, the cylindrical conductive ceramic 42 is separated from the quartz glass tube 41c at a distance that does not melt the quartz glass tube 41c due to high heat during heat generation. The reason why the cylindrical conductive ceramics 42 are arranged apart from each other is to efficiently induction-heat all the cylindrical conductive ceramics 42 during high frequency induction. However, the number of cylindrical conductive ceramics 42 put in the quartz glass tube 41c is not limited.

  As shown in FIG. 3C, the plurality of ceramics 42 are fixed by using two circular plates 43a and 43b having an outer peripheral size that can be fitted into the large-diameter side openings of the flanges 41a and 41b. . Each of the circular plates 43a and 43b is made of the same material as the flanges 41a and 41b. A through hole 43h having the same size as the inner diameter of the plurality of cylindrical conductive ceramics 42 is formed on the circular surface. The same number of openings are opened. Each through-hole 43h is opened to each circular plate 43a, 43b so that each ceramic 42 is separated when a plurality of cylindrical conductive ceramics 42 are sandwiched and fixed by the circular plates 43a, 43b. Yes.

  The circular plates 43a and 43b in which the plurality of through holes 43h are opened are fitted into the large diameter openings of the flanges 41a and 41b, and the through holes 43h are interposed between the circular plates 43a and 43b. A plurality of cylindrical conductive ceramics 42 are sandwiched and fixedly arranged in a state in which the through holes of the cylindrical conductive ceramics 42 coincide with each other.

  The coil 12 is arranged by being wound around the outer peripheral side of the quartz glass tube 41c via the gap G. In addition, the above-described planar coil or the like is arranged in the vicinity of the outer peripheral side of the quartz glass tube 41c. Also good.

According to this configuration, when a high frequency current is supplied to the coil 12, the plurality of cylindrical conductive ceramics 42 are induction-heated, and the inside of each cylindrical conductive ceramic 42 contacts or collides with the inner wall, or a hollow portion is formed. The harmful gas that passes through is decomposed into harmless gas. At this time, since the inner diameter of the cylindrical conductive ceramic 42 is small, most of the molecules that fluctuate due to high-frequency induction of harmful gas contact or collide with the inner wall. For this reason, harmful gas is easily decomposed. Further, although the amount of harmful gas passing through one cylindrical conductive ceramic 42 is small, a plurality of harmful gases are disposed, so that a large amount of harmful gas can be decomposed in total.
However, when each cylindrical conductive ceramic 42 is sandwiched and fixed between the circular plates 43a and 43b, the quartz glass tube 41c may be omitted.

Moreover, the structure of the thermal decomposition means 40 of the modification 1 is good also as a structure which removed each circular plate 43a, 43b which pinched | interposed and fixed the several cylindrical electroconductive ceramics 42 from both sides.
In this case, the respective cylindrical conductive ceramics 42 are held by a holding mechanism (not shown) so as to be held in a separated state and in a separated state from the quartz glass tube 41c as shown in FIG.

In this configuration, the harmful gas introduced through the gas introduction pipe 14 a passes through the inside of the plurality of cylindrical conductive ceramics 42 in the casing 41, and between each cylindrical conductive ceramic 42. pass. At this time, since a plurality of cylindrical conductive ceramics 42 are arranged in the casing 41, an area where harmful gas contacts or collides with the cylindrical conductive ceramics 42 increases. For this reason, harmful gas can be decomposed | disassembled efficiently.
Furthermore, each cylindrical conductive ceramic 42 may be replaced with a columnar conductive ceramic.

<Modification 2 of thermal decomposition means>
The thermal decomposition means of the modification 2 in the harmful substance decomposition apparatus 10 of this embodiment is demonstrated. 4A is a side view showing the external configuration of the thermal decomposition means 30 of Modification 2, and FIG. 4B is a cross-sectional view taken along line A2-A2 shown in FIG.

  The thermal decomposition means 30 shown in FIG. 4A includes a cylindrical casing 31 connected between the gas introduction pipe 14a and the gas discharge pipe 14b, and a predetermined heat resistance or more disposed in the casing 31. A plurality of columnar members 32 and a plurality of spherical conductive ceramics 33 are provided. However, the heat resistance above a predetermined level is a heat resistance equal to or higher than the decomposition temperature of the spherical conductive ceramic 33.

  The casing 31 is configured by using two flanges 31a and 31b and a cylindrical quartz glass tube 31c. The configuration of the casing 31 is substantially the same as that of the casing 41 described above and is made of the same material.

  The columnar member 32 is disposed inside the quartz glass tube 31 c, the axial direction of the columnar member 32 coincides with the connection direction between the gas introduction tube 14 a and the gas discharge tube 14 b, and a plurality of columnar members 32. Are arranged separated by a predetermined distance in the circumferential direction inside the quartz glass tube 31c.

  The spherical conductive ceramics 33 have a spherical shape and are filled and stored inside the columnar members 32 arranged inside the quartz glass tube 31c as described above. In addition, although the filling amount of the spherical conductive ceramics 33 is assumed to be full in this example, the amount necessary for decomposition may be filled in consideration of the flow rate of harmful gas, the amount of decomposition treatment, and the like. . Further, the spherical conductive ceramics 33 may have an elliptical spherical shape, a polyhedral shape, or a lump shape (block shape) with unevenness, in addition to the above-described spherical shape. Furthermore, the spherical conductive ceramics 33 may have different sizes as long as they do not come out from between the columnar members 32 toward the quartz glass tube 31c.

  The coil 12 is wound around the outer peripheral side of the quartz glass tube 31c via the gap G. In addition, the above-described planar coil or the like is disposed near the outer peripheral side of the quartz glass tube 31c. Also good.

  According to this configuration, when the high-frequency current is supplied to the coil 12, the spherical conductive ceramic 33 is induction-heated, and the harmful gas is decomposed into a harmless gas by the both.

  In this case, since the plurality of spherical conductive ceramics 33 are filled on the inner peripheral side of the plurality of columnar members 32 arranged around in the harmful gas flow path, almost all of the harmful gas is contained. The molecules come into contact with or collide with the spherical conductive ceramic 33. For this reason, harmful gas can be decomposed | disassembled into harmless gas efficiently in a short time in large quantities. Even if the harmful gas is difficult to decompose, it can be efficiently decomposed into harmless gas in a shorter time.

A plurality of columnar members 32 are disposed along the inner peripheral surface of the quartz glass tube 31c so as to surround the plurality of spherical conductive ceramics 33 inside.
According to this configuration, the quartz glass tube 31c outside the columnar member 32 can be protected from being melted by the high heat of the conductive ceramics. For this reason, since the housing can be formed of a material with slightly inferior heat resistance, the housing can be manufactured from a low-cost material that can be easily processed.

  However, the columnar member 32 can be omitted if a heat-resistant material (general ceramics or the like) that can withstand the temperature of the spherical conductive ceramics 33 is used instead of the quartz glass tube 31c. Further, the columnar member 32 may be a columnar conductive ceramic as long as it is separated from the quartz glass tube 31c by a predetermined distance or more.

<Modification 3 of thermal decomposition means>
The thermal decomposition means of the modification 3 of the harmful substance decomposition apparatus 10 of this embodiment is demonstrated. FIG. 5 is a partially cutaway perspective view showing the configuration of the thermal decomposition means 50 of the third modification. 6A is a cross-sectional view taken along the line A5-A5 shown in FIG. 5, and FIG. 6B is a cross-sectional view taken along the line A6-A6 shown in FIG.

The thermal decomposition means 50 shown in FIG. 5 includes a cylindrical conductive ceramic 51 having the same characteristics as the conductive ceramic 11 and a housing 52.
The cylindrical conductive ceramic 51 has a cylindrical shape, and both ends of the cylinder are closed. The gas introduction tube 14a is inserted through one through-hole to the middle of the cylinder. Further, a plurality of slits 51a (see FIGS. 6A and 6B) are formed on the outer peripheral wall of the cylinder. The closed space of the cylindrical conductive ceramic 51 is the second hollow portion described in the claims.

  Further, as shown in FIG. 6A, a life ring 51b in which grooves are spirally formed from the inlet side to the outlet side along the inner peripheral direction is provided on the inner wall surface of the cylindrical conductive ceramic 51. May be.

  The casing 52 has a substantially cylindrical shape connected between the gas introduction pipe 14a protruding from the cylindrical conductive ceramic 51 and one end side of the gas discharge pipe 14b. This generally cylindrical shape surrounds the cylindrical conductive ceramic 51 in a closed shape. In addition, the closed space of the housing | casing 52 is the 1st hollow part of a claim.

  That is, the casing 52 is closed at the end on the gas introduction pipe 14a side by the flat surface 52a and at the end on the gas discharge pipe 14b side by the conical surface 52b projecting conically. ing. Further, the closed surface 52a has a through-hole through which the gas introduction tube 14a is inserted, and the top of the conical surface 52b has a through-hole through which the gas discharge tube 14b is inserted. Moreover, the housing | casing 52 is formed with the material which has the thermal characteristic mentioned above. In this example, it is assumed that it is made of alumina.

  The coil 12 is wound around the outer periphery of the housing 52 via the gap G, but the above-described planar coil or the like may be disposed in the vicinity of the outer periphery of the housing 52. .

  In this configuration, the harmful gas introduced through the gas introduction pipe 14 a is discharged into the cylindrical conductive ceramic 51 that is induction-heated by the coil 12. This discharged harmful gas is radiatively pyrolyzed in the internal space of the cylindrical conductive ceramic 51. In this case, the harmful gas is discharged from the plurality of slits 51a to the inner wall side of the housing 52, and at this time, it is decomposed as follows.

  That is, an eddy current is generated on the outer peripheral surface of the cylindrical conductive ceramic 51 by high-frequency induction, but at this time, no current can flow through each slit 51a. For this reason, an eddy current concentrates on the wall part (referred to as the slit wall part) of the gap between the slits 51a. As a result, the slit wall portion of each slit 51 a is heated to a higher temperature than the outer peripheral surface of the cylindrical conductive ceramic 51. For this reason, the space of each slit 51 a becomes higher than the wide internal space of the cylindrical conductive ceramic 51. As a result, even if the harmful gas is not decomposed in the internal space of the cylindrical conductive ceramic 51, when it is discharged from each slit 51a, it is decomposed by contact with or colliding with the slit wall portion, and the gap between the slits 51a. It is reliably decomposed by high-temperature radiant heat.

The gas thus decomposed is sucked rearward in the casing 52 and discharged to the gas discharge pipe 14b. The number of slits 51a and the opening size may be changed in accordance with the amount of harmful gas processed and the processing time.
In addition, if the harmful gas is easily combusted, the above-described thermal decomposition means 13, 30, 40, 50 may be confined in a closed casing, and the inside thereof may be filled with an inert gas or the like.

  Further, the casing 52 containing the cylindrical inductive ceramic 51 may be connected to the gas introduction pipe 14a and the gas discharge pipe 14b with the gas introduction side and the discharge side reversed. That is, the gas exhaust pipe 14b is inserted partway through the cylinder through the casing 52 and the through hole in one closed surface of the cylindrical conductive ceramic 51. Further, the gas introduction tube 14a is inserted into the through hole at the top of the conical surface 52b of the housing 52 and fixed.

<Application Example 1 of Embodiment>
A combustion gas decomposition system as application example 1 of the present embodiment will be described. FIG. 7 is a diagram showing a configuration of a combustion gas decomposition system 60 as an application example 1 using the harmful substance decomposition apparatus of the present embodiment.
The combustion gas decomposition system 60 shown in FIG. 7 decomposes the combustion gas indicated by the arrow Y1 harmlessly generated by incineration equipment (incineration means) 61 incinerated material containing PCB and containing harmful gas such as dioxin. And discharged into the atmosphere. However, although any of the above-described thermal decomposition means 13, 30, 40, 50 can be used for the system 60, the thermal decomposition means 30 is used.

  The combustion gas decomposition system 60 includes the above-described thermal decomposition means 30, a storage tank 63 of carbon (also simply referred to as carbon) 62 decomposed by the thermal decomposition means 30, a shower ring tower 65, and an activated carbon packed bed 66. Prepare. Three openings of a combustion gas discharge port of the incineration facility 61, a gas inlet port of the thermal decomposition means 30, and a carbon 62 recovery port of the storage tank 63 are connected by a gas introduction pipe 14a. An open / close valve 15a is disposed in the vicinity of one end of the gas introduction pipe 14a into which the combustion gas indicated by the arrow Y1 flows together with air. Further, the gas outlet of the thermal decomposition means 30 and the gas inlet of the shower ring tower 65 are connected by a gas exhaust pipe 14b with an opening / closing valve 15b and a suction device 16 interposed therebetween. Further, the gas outlet of the shower ring tower 65 and the gas inlet of the activated carbon packed bed 66 are connected by a gas outlet pipe 14b, and one end of the gas outlet pipe 14b is connected to the gas outlet of the activated carbon packed bed 66. Has been.

  The thermal decomposition means 30 is arranged at a position above the outlet of the incineration facility 61, and the gas inlet and outlet of the thermal decomposition means 30 are arranged in a direction perpendicular to the ground (vertical direction). Has been placed.

  The storage tank 63 is installed on the ground below the thermal decomposition means 30. The recovery port of the storage tank 63 is provided on the upper surface of the storage tank 63, and the recovery port and the gas inlet of the thermal decomposition means 30 on the upper side are arranged in a vertically opposed state. With such an arrangement, when dioxin is decomposed in the combustion gas in the pyrolysis means 30, the thermally decomposed carbon 62 is stored from the recovery port through the vertical pipe of the gas introduction pipe 14a as indicated by an arrow Y3. It falls to the inside of the tank 63.

  The shower ring tower (simply referred to as a tower) 65 is disposed on the ground. A gas inlet is provided at a position below the tower 65, and a gas outlet is provided at a position above the surface opposite to the gas inlet arrangement surface. Is provided. In addition, the tower 65 has a function of allowing a liquid such as water to flow in a shower from above, and the gas flowing in from the lower inlet passes through the liquid shower and is discharged from the upper outlet on the opposite side. Is done. With this configuration, the tower 65 is configured to collect the chlorine gas and hydrogen chloride gas molecules remaining in the gas after decomposition of the combustion gas by flowing the liquid with a liquid shower from above.

  The activated carbon packed layer 66 adsorbs and removes residual components such as odor molecules remaining without being collected by the tower 65 through the fine pores of the activated carbon. The cracked gas after the removal is discharged from the outlet of the gas discharge pipe 14b as harmless and odorless. At this time, if it is difficult to discharge, suction may be performed by a blower on the outlet side of the shower ring tower 65 or on the outlet side of the activated carbon packed bed 66.

  In such a configuration, first, a liquid shower is caused to flow inside the shower ring tower 65 in advance preparation. Further, a high frequency current is passed from the AC power source 19 to the coil 12 to inductively heat both of the spherical conductive ceramics 33, and the spherical conductive ceramics 33 are heated to a preset temperature, for example, 1500 ° C.

  When the spherical conductive ceramics 33 reaches 1500 ° C., the open / close valves 15a and 15b in the closed state are opened, and the suction device 16 in the stopped state is activated. As a result, air containing combustion gas flows from the inlet of the gas introduction pipe 14a in the direction indicated by the arrow Y1, and further flows through the thermal decomposition means 30 as indicated by the arrow Y2a toward the shower ring tower 65.

  Next, in the incineration facility 61, combustion gas is generated when the incineration object is combusted. This combustion gas may contain harmful gases such as dioxins. The combustion gas flows together with air into the thermal decomposition means 30 through the gas introduction pipe 14a as indicated by an arrow Y1. The inflowing combustion gas flows backward while contacting or colliding with the spherical conductive ceramics 33 heated to 1500 ° C., and at this time, the harmful gas is decomposed with high heat. At this time, if the harmful gas contains, for example, dioxins, the benzene ring by carbon is decomposed and separated into oxygen, chlorine, hydrogen chloride and carbon.

  As indicated by an arrow Y3, the carbon 62 falls in the vertical pipe of the gas introduction pipe 14a, and further falls and accumulates from the collection port of the storage tank 63 to the inside.

  On the other hand, the cracked gas decomposed by the thermal decomposition means 30 flows out from the thermal decomposition means 30 as indicated by an arrow Y2a together with air, and flows into the shower ring tower 65 through the suction device 16. In this tower 65, the molecules of chlorine gas and hydrogen chloride gas remaining in the cracked gas are collected by flowing in a liquid shower. After the recovery, the decomposition gas flows into the activated carbon packed bed 66, and residual components such as odor molecules remaining without being recovered by the tower 65 are adsorbed and removed by the activated carbon. The cracked gas after the removal is discharged from the outlet of the gas discharge pipe 14b together with air as harmless and odorless.

  According to the combustion gas decomposition system 60 having such a configuration, the following effects can be obtained. Dioxins and other harmful gases that are generated when incinerators containing PCB are burned can be harmlessly decomposed and released to the atmosphere. Further, the carbon 62 that is simultaneously decomposed during the gas decomposition can be separately accumulated in the storage tank 63 and used later for applications such as filter components.

Further, in the conventional thermal decomposition means, since oxygen oxidizes and deteriorates the heating element, thermal decomposition treatment cannot be performed in a state where harmful gas and oxygen are mixed. For this reason, the system which burns the content of harmful substances in the incineration facility 61 and introduces the combustion gas containing the harmful gas at the time of the combustion into the thermal decomposition means in a state where oxygen is mixed, and decomposes the harmful gas harmlessly. Could not be realized.
However, in the combustion gas decomposition system 60, since the spherical conductive ceramics 33, which is a heating element of the thermal decomposition means 30, are not oxidized, the combustion gas from the incineration facility 61 is introduced into the thermal decomposition means 30 in a state where oxygen is mixed. A system can be realized.

  In the incineration facility 61, an incinerator including PCB or the like may be burned. In this case, combustion gas is generated including harmful gas such as dioxin by PCB combustion. This combustion gas flows together with air into the thermal decomposition means 30 through the gas introduction pipe 14a as indicated by an arrow Y1. The inflowing combustion gas flows backward while contacting or colliding with the spherical conductive ceramics 33 heated to 1500 ° C. At this time, the harmful gas is decomposed with high heat.

<Application Example 2 of Embodiment>
A vaporized gas decomposition system as application example 2 of the present embodiment will be described. FIG. 8 is a diagram showing a configuration of a vaporized gas decomposition system 70 as application example 2 using the harmful substance decomposition apparatus of the present embodiment.
The vaporized gas decomposition system 70 shown in FIG. 8 is a vaporized gas indicated by an arrow Y1 generated by containing a harmful gas such as dioxin when the incinerated ash is heat-treated by a rotary kiln (heat treatment means) 71 which is a rotary kiln. Is harmlessly decomposed and released to the atmosphere. However, the incineration ash is ash or burnt residue generated when incineration of garbage containing harmful substances such as PCB or DDT, or general garbage.

  The vaporized gas decomposition system 70 is different from the above-described combustion gas decomposition system 60 (FIG. 7) in that a rotary kiln 71 is provided instead of the incineration facility 61.

  The rotary kiln 71 slowly feeds the rotary kiln 71 slowly forward while heating the incinerated ash charged therein as indicated by the arrow Y11 to about 800 ° C. At this time, the harmful substance of the incinerated ash is vaporized as a harmful gas (for example, dioxin) by heating. At this time, the ash (decomposed ash) remaining after decomposition of the harmful substance is discharged from an outlet (not shown) of the rotary kiln 71 to an external container (not shown) as indicated by an arrow Y12.

  On the other hand, the vaporized gas containing the vaporized harmful gas is introduced into the thermal decomposition means 30 from the rotary kiln 71 through the gas introduction pipe 14a as indicated by an arrow Y1 together with air. The vaporized gas introduced into the thermal decomposition means 30 is decomposed in the same manner as described above for the combustion gas decomposition system 60, and is finally decomposed as harmless and odorless gas from the activated carbon packed bed 66. Released to the atmosphere.

  According to the vaporized gas decomposition system 70 having such a configuration, the following effects can be obtained. The harmful gas contained in the vaporized gas obtained by vaporizing the incinerated ash can be decomposed harmlessly and released to the atmosphere. The decomposed ash decomposed by the rotary kiln 71 can be used separately for plant fertilizers and the like.

  Further, in the conventional thermal decomposition means, since oxygen oxidizes and deteriorates the heating element, thermal decomposition treatment cannot be performed in a state where harmful gas and oxygen are mixed. For this reason, it is necessary to enclose the heat treatment means and to fill the inside with a vacuum or an inert gas, which is expensive.

  However, in the vaporized gas decomposition system 70 of the present embodiment, since the spherical conductive ceramics 33 that are the heating elements of the thermal decomposition means 30 are not oxidized, the vaporization gas from the rotary kiln 71 is mixed with oxygen in the thermal decomposition means 30. It is possible to realize a system to be introduced in For this reason, the cost of manufacturing and operating the system 70 can be reduced.

  Further, in the vaporized gas decomposition system 70, the example in which the incineration ash is introduced into the rotary kiln 71 has been described. Can decompose vaporized harmful gases.

  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 Hazardous substance decomposition apparatus 11 Conductive ceramics 12 Induction heating coil 13, 30, 40, 50 Thermal decomposition means 14a Gas introduction pipe 14b Gas discharge pipe 15a, 15b On-off valve 16 Suction device 17 Water scrubber 18 Activated carbon filter 19 AC power source 21 Temperature Sensor 22 Temperature setting unit 23 Power control unit 25 Valve open / close control unit 26 Suction control unit 31, 41, 52 Housing 31a, 31b, 41a, 41b Flange 31c, 41c Quartz glass tube 32 Columnar member 33 Spherical conductive ceramics 42 Cylindrical shape Conductive ceramics 43a, 43b Circular plate 43h Through hole 51 Cylindrical conductive ceramic 51a Slit 60 Combustion gas decomposition system 61 Incineration equipment 70 Vaporized gas decomposition system 71 Rotary kiln

Claims (3)

A coil to which a high frequency current is supplied from a power source;
Pyrolysis in which block-shaped conductive ceramics that generate heat by induction heating when supplying high-frequency current to the coil and have heat resistance of at least 1350 ° C. or more are arranged so that a void is formed in a cylindrical housing. Means,
Along the inner circumferential surface of the housing, before Symbol block-shaped conductive ceramic is disposed in a state surrounded by a plurality of columnar members having at least the heat-resistant,
Introducing means for introducing a gaseous organic halogen compound from one end of the housing;
Discharging means for discharging gas from the other end of the housing;
A harmful substance decomposition apparatus comprising: The hazardous substance decomposition apparatus according to claim 1 ;
Incineration means for burning the contents of harmful substances and generating combustion gas containing harmful gases at the time of combustion,
With
A combustion gas decomposition system, wherein the combustion gas generated by the incineration means is introduced into the thermal decomposition means via the introduction means. The hazardous substance decomposition apparatus according to claim 1 ;
A heat treatment means for heat-treating the contents of harmful substances, and generating a vaporized gas containing harmful gases during the heat treatment;
With
The vaporized gas decomposition system, wherein the vaporized gas generated by the heat treatment means is introduced into the thermal decomposition means via the introduction means.

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