JP2006167500A - Dioxins detoxifying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dioxins detoxifying apparatus capable of safely and efficiently performing detoxifying of a solid contaminated by the dioxins at a low cost. <P>SOLUTION: The dioxins detoxifying apparatus 1 is provided with a vacuum heating means 10 for separating the dioxins from a contaminated waste W by heating the contaminated waste W containing the dioxins in the vacuum state; and an electron beam treatment means 20 for decomposing and detoxifying the dioxins separated from the contaminated waste W by the vacuum heating means 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an apparatus for removing and detoxifying dioxins contained in a solid.

From January 2000, the “Dioxin Countermeasures Special Measures Law” has been implemented to comprehensively promote measures such as prevention of environmental pollution caused by dioxins. Tolerable daily intake (4 picogram / kg body weight / day) and air pollution (annual average 0.6 picogram-TEQ / m ³ ), water pollution (1 picogram-TEQ / m ³ ), water pollution (150 picogram- Environmental standards related to TEQ / m ³ ) and soil contamination (1000 picogram-TEQ / m ³ ) were established.

  For this reason, waste contaminated with dioxins (hereinafter sometimes referred to simply as “contaminated waste”) is finally disposed of at a controlled disposal site, which is a specific final disposal site that accepts special management. In addition, as an alternative, the dioxins contained can be obtained by decomposing dioxins by high-temperature combustion and purifying contaminated waste, or by performing intermediate treatment such as melting and solidification by adding cement or asphalt. The method of final disposal is adopted after immobilization and stabilization.

  However, since there are few managed disposal sites and facilities capable of intermediate processing, and transportation is limited to authorized collection and transportation companies, there is a problem that the amount of contaminated waste received cannot catch up with the amount discharged. In addition, compared to general industrial waste, stricter management and treatment systems are required, so it is necessary to prevent scattering and tracking management during transshipment / transportation, resulting in increased waste disposal costs. Yes. On the other hand, in the solidification treatment with cement and asphalt, the amount of waste to be disposed increases by the amount of solidification material added, so the disposal cost increases, and the environmental load on the final disposal site, which has recently become tight, has increased. It has the problem of being.

For this reason, in order to reduce the load on the final disposal site as much as possible without requiring special management, various techniques have been disclosed as methods for treating dioxins contained in waste. Necessary measures are taken to prevent or remove environmental pollution caused by dioxins generated during treatment. For example, in the invention described in Patent Document 1, tar or ash containing dioxins is dispersed or dissolved, and high-energy electron beam irradiation is applied to the incinerator dissolved or dispersed liquid, thereby dioxins chlorine. A technique for dissociating and detoxifying by dechlorination is disclosed.
Japanese Patent Laid-Open No. 10-192818 ([0014]-[0023], FIG. 1)

  However, the said processing method isolate | separates the dioxins contained in the tar and ash which generate | occur | produced from the incinerator, and does not directly process solids, such as industrial waste. For this reason, solid waste generated by the dismantling of a facility that seems to contain dioxins could not be detoxified, and its treatment targets were limited. In addition, after transporting a large amount of waste to an incineration facility, dioxins can only be detoxified after it has been incinerated, so transport and incinerate contaminated waste under strict control. In addition, since the detoxification treatment of dioxins is further performed, there is a problem that the cost increases.

  The present invention aims to solve the above-mentioned problems, and is capable of detoxifying dioxins that can be detoxified safely and efficiently at a low cost. It is an object to provide a processing apparatus.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a vacuum heating means for separating the dioxins from the solid by heating a solid containing dioxins in a vacuum state, and the vacuum heating means. It is a dioxins detoxification processing apparatus provided with the electron beam processing means which decomposes | disassembles and detoxifies the said dioxins isolate | separated from the said solid.

  Further, the invention according to claim 2 is the dioxin detoxification treatment apparatus according to claim 1, wherein the vacuum heating means removes the solid in order from the solid inlet to the outlet. A purge chamber that is depressurized to a vacuum, a vacuum heating furnace that heat-treats the solid that has been depressurized to a medium vacuum in the purge chamber in a high vacuum, and a large amount of the solid that is heat-treated in the vacuum heating furnace. Three cooling chambers for cooling while returning to atmospheric pressure, and a vacuum air supplying means for supplying the electron beam processing means with a gas containing the dioxins separated from the solid in the process of each of the three chambers. The electron beam processing means includes an irradiation chamber into which the gas supplied by the vacuum air supply means flows, and the gas in the irradiation chamber connected to the irradiation chamber. It is characterized by comprising an electron beam irradiation device for performing irradiation treatment of the electron beam.

Since such a dioxin detoxification treatment apparatus is decomposed by an electron beam processing means in addition to a vacuum heating means, it becomes possible to set the heating temperature lower than when dioxins are decomposed by a vacuum heating means alone. . For this reason, energy efficiency for decomposition is improved, the vacuum heating means can be downsized, and the space required for the dioxin detoxification treatment apparatus can be reduced. In addition, this downsizing makes it possible to mount a deoxin detoxification treatment device on-board, so that the dioxin detoxification treatment device can be moved, and the contamination can be carried out without transporting contaminated waste under strict management. It is possible to perform the detoxification process at the waste generation point.
Here, the vacuum state means a state in a space filled with a gas having a pressure lower than the normal atmospheric pressure. Moreover, the medium vacuum and the high vacuum indicate the pressure region in which the degree of the vacuum state is distinguished. The medium vacuum has a pressure of 100 Pa or less and greater than 0.1 Pa, and the high vacuum has a pressure of 0.1 Pa or less and greater than 10 μPa. It is considered as a range.

  The invention described in claim 3 is the dioxin detoxification treatment apparatus according to claim 2, wherein the irradiation chamber has a gas swirling mechanism for swirling the gas that has flowed into the irradiation chamber. It is characterized by that.

  With such a dioxin detoxification treatment apparatus, the contaminated gas flowing into the irradiation chamber is swirled in the irradiation chamber, so that mixing and homogenization of the contaminated gas can be achieved and the irradiation efficiency can be improved.

  The invention according to claim 4 is the dioxin detoxification apparatus according to claim 2 or claim 3, wherein preheat drying means for preheating and drying the solid containing the dioxins in advance is provided. It is characterized by having.

  The invention described in claim 5 is the dioxin detoxification treatment apparatus according to claim 4, wherein the preheating drying means generates a gas generated by the preheating drying process of the solid containing the dioxins. An air supply means for supplying air to the electron beam processing means is provided.

  The invention according to claim 6 is the dioxin detoxification processing apparatus according to claim 5, wherein the electron beam processing means contains dioxins sucked from the vacuum heating means and the preheating drying means. A gas mixing chamber for mixing the gas to be mixed, and the gas mixed by the mixing chamber is fed to the irradiation chamber.

  With such a dioxin detoxification treatment apparatus, it is possible to perform a vacuum heat treatment with high thermal efficiency by performing a preheating drying treatment as a pretreatment for vacuum heating. In addition, after all the gas containing dioxins generated in the vacuum heat treatment means and the preheating drying means (hereinafter sometimes referred to as “polluted gas”) is mixed and homogenized by the electron beam treatment means, the detoxification treatment is performed. Since it is the structure to perform, polluting gas does not flow out outside and it can process safely.

  The invention described in claim 7 is the dioxin detoxification treatment apparatus according to any one of claims 2 to 6, wherein the electron beam irradiation apparatus flows into the irradiation chamber. A concentration sensor that detects the concentration of dioxins contained in the gas, and an irradiation amount control mechanism that controls the irradiation dose of the electron beam irradiation apparatus in conjunction with the concentration sensor are provided.

  By such a dioxin detoxification treatment device, the irradiation dose of the electron beam irradiation device is controlled by the dose control mechanism according to the flow rate of the pollutant gas flowing into the irradiation chamber and the concentration of the dioxins, so as to meet the decomposition efficiency A reliable and efficient detoxification process is possible.

  The invention described in claim 8 is the dioxin detoxification apparatus according to any one of claims 2 to 7, wherein the electron beam processing means flows into the irradiation chamber. A temperature sensor for detecting the temperature of the gas and a cooling gas blowing means for blowing a cooling gas according to the temperature of the gas are provided.

  With such a dioxin detoxification treatment device, the temperature sensor detects the temperature of the contaminated gas and controls the cooling gas blower to adjust the temperature of the contaminated gas to be treated below the allowable temperature of the electron beam irradiation device. Is possible.

  Furthermore, even if the electron beam irradiation device is stopped for some reason by the dioxin detoxification treatment device, each air supply means such as the vacuum air supply means, the air supply means, and the cooling gas blowing means is automatically stopped. As described above, if the air supply means control mechanism is provided, it is possible to prevent the contaminated gas from flowing out to the outside without being processed, which is preferable.

The present invention makes it possible to safely and efficiently perform the detoxification treatment of solid waste contaminated with dioxins generated during incinerator demolition work, etc. It can be disposed as unnecessary general industrial waste and reused as crushed stone or aggregate.
For this reason, the amount of waste does not increase compared to the stable treatment with cement, asphalt, etc., so the burden on the final disposal site can be reduced, and no special management is required. The degree of freedom in selecting the means increases, and the cost required for final disposal can be greatly reduced.

  Preferred embodiments of the present invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.

[Constitution]
FIG. 1 is a schematic diagram showing the configuration and processing procedure of the dioxin detoxification processing apparatus according to the present embodiment. In the present embodiment, solid waste (hereinafter sometimes referred to as “contaminated waste”) W that has been contaminated with dioxins, which is generated during the demolition work of the incineration facility, is crushed to a predetermined shape by the crushing device 2. After that, the case of detoxifying with the dioxin detoxifying apparatus 1 will be described.

  As shown in FIG. 1, the dioxin detoxification processing apparatus 1 includes a vacuum heating means 10, an electron beam processing means 20, and a preheating drying means 30 as main parts.

The vacuum heating means 10 is composed of a sealed container in which the inside formed in a box shape is divided into four chambers. The vacuum heating means 10 has an input port 11 into which the contaminated waste W preliminarily dried by the preheating drying unit 30 is input, and dioxins are separated by a vacuum heating process at a position facing the input port 11. The solid waste (hereinafter sometimes referred to as “processing waste”) W ′ is discharged from the dioxin detoxification processing apparatus 1. In addition, the material of the vacuum heating means 10 is not limited.
Here, the preheating drying means 30 is connected to the inlet 11 of the vacuum heating means 10 and the mixing chamber 21 of the electron beam processing means 20, and a kiln 31 for preheating and drying the contaminated waste W, and the kiln 31. And a blower 32 that feeds the contaminated gas generated by the preheating drying process to the mixing chamber 21.

The four chambers inside the vacuum heating means 10 are sequentially heated from the inlet 11 to the purge chamber 12 for depressurizing the contaminated waste W to the medium vacuum, and the contaminated waste W depressurized to the medium vacuum in a vacuum state. A vacuum heating furnace 13 to be processed into the processing waste W ′, a passage chamber 14 for naturally cooling the processing waste W ′ heat-treated in a vacuum state, and a cooling chamber 15 for cooling the natural processing waste W ′. The purge chamber 12, the vacuum heating furnace 13, the passage chamber 14 and the cooling chamber 15 are each gas containing dioxins separated from the contaminated waste W (hereinafter sometimes referred to as "polluted gas"). Is connected to a vacuum air supply means 17 for supplying air to the electron beam processing means 20. In addition, the contaminated waste W is transported between the chambers using a transport device such as a belt conveyor, and the contaminated waste W introduced from the inlet 11 is mechanically moved from the purge chamber 12 to the cooling chamber 15. Is passed through the detoxification process and discharged from the discharge port 16.
Here, the cooling method of the contaminated waste W in the cooling chamber 15 is not limited. For example, the cooling chamber 15 may be cooled by applying a cooling gas by a cooling gas blower. Although the passage chamber 14 is disposed in front of the cooling chamber 15, the cooling chamber 15 may be in front of the cooling chamber 15, and after cooling to a predetermined temperature, the passage chamber 14 may be naturally cooled.

From each chamber of the vacuum heating means 10, pipe members connected to the mixing chamber 21 of the electron beam processing means 20 through the vacuum air supply means 17 are piped.
The vacuum air supply means 17 is comprised from the vacuum pump 17a, the filter 17b, and the condenser 17c arrange | positioned in order from the mixing chamber 21 side. Then, the vacuum heating unit 10 is brought into a low oxygen state by the vacuum pump 17a, and all the contaminated gas generated in the vacuum heating unit 10 is supplied to the electron beam processing unit 20.

  The electron beam processing means 20 is supplied with the contaminated gas fed from the blower 32 of each vacuum air feeding means 17 and the preheating drying means 30 and mixes the contaminated gas therein, thereby homogenizing the mixing chamber 21. And an irradiation chamber 22 for irradiating the contaminated gas homogenized by the mixing chamber 21 with an electron beam, and an electron beam irradiation device 23 connected to the irradiation chamber 22 for generating an electron beam. .

  A pipe extending from the blower 32 and the vacuum pump 17a is connected to the mixing chamber 21, and a temperature sensor 24 and a concentration sensor 26 are disposed therein. Further, the mixing chamber 21 adjusts the flow rate of the cooling gas on the basis of the temperature of the contaminated gas in the mixing chamber 21 detected by the temperature sensor 24, and sets the temperature of the contaminated gas flowing into the irradiation chamber 22 to 0 ° C. A cooling gas blowing means 25 for adjusting the temperature within a range of 200 ° C. is connected. Moreover, the mixing chamber 21 has a screw (not shown) for mixing the contaminated gas that has flowed therein.

The mixing chamber 21 and the irradiation chamber 22 are connected via a pipe or the like, and the contaminated gas whose temperature is adjusted in the mixing chamber 21 flows out to the irradiation chamber 22.
The irradiation chamber 22 is provided with a screw (not shown) for causing the contaminated gas flowing in from the mixing chamber 21 to flow down in a cyclone state, and is sealed so that the contaminated gas does not leak to the outside. And is connected to the electron beam irradiation device 23. In the present embodiment, a check valve 29 is provided in the pipe between the mixing chamber 21 and the irradiation chamber 22 to prevent the backflow of contaminated gas from the irradiation chamber 22 to the mixing chamber 21. .

  The electron beam irradiation device 23 is a device interlock (blower unit control mechanism) 27 that stops the vacuum pump 17a, the cooling gas blowing unit 25, and the blower 32 described later when the electron beam irradiation unit 23 is stopped. Is provided. Further, based on the detection result of the concentration sensor 26, the irradiation dose of the electron beam irradiated from the electron beam irradiation device 23 in the range of 0.01 kGy to 100 kGy according to the concentration of dioxins with respect to the inflow amount of the pollutant gas flowing into the irradiation chamber 22. A dose control mechanism (not shown) that adjusts automatically is provided.

Further, in the irradiation chamber 22 of the electron beam processing means 20, a filter 28 is disposed at a discharge port (not shown) that discharges a polluted gas (hereinafter sometimes referred to as “processing gas”) in which dioxins are decomposed by the irradiation processing. Has been.
Here, the connection part of the mixing chamber 21 and the irradiation chamber 22 is sealed so that the contaminated gas does not leak to the outside.

[Flow of detoxification process]
Next, the flow of the detoxification process by the dioxin detoxification apparatus 1 according to the present embodiment will be described.
First, the contaminated waste W containing dioxins accompanying the dismantling work of the incineration facility crushed by the crushing apparatus 2 into the substantially same shape is put into the preheating drying means 30, and the kiln 31 converts it into the contaminated waste W. Preheating drying treatment is performed in advance at a heating temperature of about 120 ° C. At this time, water vapor (contaminated gas) generated along with the preheating drying process of the contaminated waste W is sent to the mixing chamber 21 of the electron beam processing means 20 through the blower 32.

The contaminated waste W that has been subjected to the preheating drying process by the preheating drying means 30 is input to the vacuum heating means 10 from the input port 11. The contaminated waste W put into the vacuum heating means 10 is depressurized to a medium vacuum (about 5 Pa) in the purge chamber 12 and heated to about 50-380 ° C. in a vacuum state in the vacuum heating furnace 13. To do. The contaminated waste W is cooled in two stages in the passage chamber 14 and the cooling chamber 15 and discharged from the vacuum heating means 10 through the discharge port 16. At this time, the contaminated waste W is transported mechanically by a belt conveyor (not shown).
In addition, the contaminated gas containing dioxins separated from the contaminated waste W generated in each chamber is mixed with the mixing chamber by the vacuum pump 17a while removing minute solids through the filter 17b and the condenser 17c. 21 is sent.

The contaminated gas sent from the vacuum heating means 10 and the preheating drying means 30 to the electron beam processing means 20 is mixed and homogenized in the mixing chamber 21. Then, the homogenized polluted gas has a temperature within a preset range (0 ° C. to 200 ° C.) in which the temperature can be efficiently irradiated in the irradiation chamber 22 based on the detection result of the temperature sensor 24. ) And the cooling gas supplied from the cooling gas blowing means 25 are supplied to the irradiation chamber 22.
The contaminated gas that has flowed into the irradiation chamber 22 is subjected to a decomposition process of dioxins by an electron beam irradiated from the electron beam irradiation device 23 while rotating in a cyclone shape. Then, the processing gas that has been subjected to the decomposition processing of dioxins is sent to the outside of the dioxin detoxification processing apparatus 1 through the filter 28. Here, it is good also as a structure which performs the cyclone-like turning of the contamination gas in the irradiation chamber 22 by the inflow action of the cooling gas sent from the cooling gas blowing means 25.

  The contaminated gas in the irradiation chamber 22 is detoxified by the electron beam irradiated from the electron beam irradiation device 23. Here, the irradiation dose of the electron beam irradiated from the electron beam irradiation device 23 is adjusted by the irradiation amount control mechanism, and according to the concentration of dioxins with respect to the inflow amount of the pollutant gas flowing into the irradiation chamber 22, Irradiation is within a range of 0.01 kGy to 100 kGy.

[Function and effect]
In this embodiment, since the preheating drying process is performed on the contaminated waste W before the vacuum heat treatment, it is possible to improve the thermal efficiency during the vacuum heat treatment. At this time, since the water vapor (contaminated gas) from which the water contained in the contaminated waste W is evaporated is sent to the electron beam processing means 20 by the blower 32, even if the water vapor contains dioxins, it is exposed to the outside. It is configured to be disassembled by the electron beam processing means 20 without leaking. In addition, water vapor contributes to the generation of active species (radicals) with strong oxidizing power in the decomposition of dioxins by electron beam irradiation treatment, so it is effectively used to improve the decomposition efficiency of dioxins by mixing with pollutant gases. can do.

  The contaminated waste W that has been subjected to the preheating drying process is first depressurized to a medium vacuum in the purge chamber 12, so that the depressurization efficiency in the vacuum heating furnace 13 can be improved. In the vacuum heating furnace 13, the contaminated waste W is heat-treated in a high vacuum state, so that dioxins contained in the solid can be easily moved to the gas phase and gasified to be separated.

Then, when the high-temperature processing waste W ′ after the vacuum heat treatment is cooled in the passage chamber 14 and the cooling chamber 15 while returning from the vacuum state to the atmospheric pressure, it is cooled in a low oxygen state by the vacuum pump 17a. By doing so, it becomes possible to suppress the resynthesis of the processing waste W ′ and dioxins.
In the vacuum air supply means 17, the filter 17b and the condenser 17c provided on the suction side of the vacuum pump 17a remove minute solids, so that the vacuum pump 17a can be prevented from being damaged by entraining the solids. Become.

  Here, in order to transport the contaminated waste W in the vacuum heating means 10 mechanically by a belt conveyor or the like in a sealed container, exposure by dioxins, a device heated to a high temperature, or contaminated waste It is possible to avoid harm such as burns caused by W and to safely perform the detoxification processing of dioxins.

  Contaminated gases sent from the vacuum air supply means 17 and the preheat drying means 30 are mixed and homogenized in the mixing chamber 21, and the concentration concentration of the dioxins is detected by the concentration sensor 26 to detect the electron beam irradiation device 23. Therefore, the electron beam irradiation process in the irradiation chamber 22 can be efficiently performed with a minimum amount of energy.

  The contaminated gas in the irradiation chamber 22 is dechlorinated by dioxins by electron beam irradiation treatment, and is decomposed into harmless substances such as water, carbon dioxide gas, and chlorine. Here, in the irradiation chamber 22, the electron beam is irradiated from the electron beam irradiation device 23 while swirling the pollutant gas in a cyclone shape, so that the irradiation is performed as compared with the case where the pollutant gas is irradiated with direct current without swirling. Time is increased and irradiation efficiency is improved.

  Further, since the device interlock 27 is interlocked with the electron beam irradiation device 23, when the electron beam irradiation device 23 is stopped for some reason, the vacuum pump 17a, the cooling gas blowing means 25 and the blower 32 are stopped. Therefore, it is possible to prevent untreated polluted gas from flowing out of the dioxin detoxification treatment apparatus 1. Further, if the device interlock 27 is configured to be linked with a transport device such as a belt conveyor (not shown) of the vacuum heating means 10, the contaminated waste W is conveyed to the outside of the dioxin detoxification treatment device 1 without being treated. It is possible to prevent this.

  Further, the dioxins are separated from the contaminated waste W by the vacuum heating means 10, and then the dioxins are decomposed by the electron beam processing means 20, so that the heating temperature of the vacuum heating means 10 is changed to the vacuum heating means. Compared with the case where 10 alone decomposes dioxins, the temperature can be lowered by about 20 ° C. to 350 ° C., and as a whole, treatment with high energy efficiency is possible.

As mentioned above, although the example of suitable embodiment was demonstrated about this invention, this invention is not limited to the said embodiment, A design change is possible suitably in the range which does not deviate from the meaning of this invention.
For example, in the present embodiment, a passage chamber is provided in front of the cooling chamber, and the contaminated waste W is cooled in two stages to improve the cooling efficiency. However, the present invention is not limited to this. The dioxin detoxification apparatus may be downsized as a configuration in which cooling is performed only in the cooling chamber without providing a passage chamber.

  In addition, the contamination gas is homogenized by the mixing chamber and then the electron beam irradiation processing is performed in the irradiation chamber. However, the present invention is not limited to this, and the irradiation chamber is not provided without the mixing chamber. It is good also as a structure which homogenizes pollutant gas and performs the irradiation process of an electron beam.

  Further, the temperature of the contaminated gas is detected by the temperature sensor and the cooling gas is mixed to adjust the temperature of the contaminated gas flowing into the irradiation chamber. For example, the heating temperature of the vacuum heating means and the electron beam By adjusting the irradiation dose of the processing apparatus in advance, the detoxification process may be performed efficiently without adjusting the temperature of the contaminated gas flowing into the irradiation chamber.

  In addition, the concentration sensor detects the concentration of dioxins in the pollutant gas and adjusts the irradiation dose of the electron beam irradiation device, but the irradiation that can reliably decompose the dioxins contained in the pollutant gas. By adjusting the electron beam irradiation device to the dose, a simple configuration in which the concentration sensor is not provided may be employed.

  Moreover, it is good also as a structure which aims at size reduction of a dioxin detoxification processing apparatus by heat-processing a contaminated waste only with a vacuum heating furnace, without arrange | positioning a preheating drying means.

Accordingly, like the dioxin detoxification treatment apparatus 1 of FIG. 2, the passage chamber 14, the mixing chamber 21, the cooling gas blowing means 25, the preheating drying means 30 from the dioxin detoxification treatment apparatus shown in the above embodiment. Etc. may be omitted, and a basic configuration that is at least necessary for the detoxification treatment of the contaminated waste may be employed.
With this configuration, the dioxin detoxification treatment apparatus 1 can be downsized and mounted on a trailer or the like, so that the dioxin detoxification treatment apparatus 1 can be moved.
In addition, by reducing the size of the dioxin detoxification treatment apparatus 1, it becomes easy to secure a space required for installation, and it is possible to install the apparatus in or near the demolition work site. By installing the dioxin detoxification treatment device 1 in the demolition work site, it is possible to perform detoxification treatment inside without taking out the contaminated waste W, which is a specially managed waste, from the site. It is possible to reduce transportation costs to processing facilities, prevent accidents such as transshipment and scattering during transportation, reduce management and tracking costs associated with transportation, and drastically reduce costs as a whole.

It is the schematic which shows the structure of the dioxin detoxification processing apparatus of this invention. It is the schematic which shows other embodiment of the dioxin detoxification processing apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dioxin detoxification processing apparatus 10 Vacuum heating means 12 Purge chamber 13 Vacuum heating furnace 15 Cooling chamber 17 Vacuum supply means 20 Electron beam processing means 22 Irradiation chamber 23 Electron beam irradiation apparatus 24 Temperature sensor 25 Cooling gas blowing means 26 Concentration sensor 27 Device interlock (blower control mechanism)
29 Check valve 30 Preheating drying means W Contaminated waste (solid)

Claims (8)

  Vacuum heating means for separating the dioxins from the solid by heating the solid containing dioxins in a vacuum state, and electrons for decomposing and detoxifying the dioxins separated from the solid by the vacuum heating means A dioxin detoxification treatment apparatus, comprising: a line treatment means. The vacuum heating means sequentially heats the solid that has been reduced in pressure to a medium vacuum in the purge chamber in a high vacuum in order from the solid inlet to the discharge port. Three chambers: a vacuum heating furnace to be treated; and a cooling chamber that cools the solid that has been heat-treated in the vacuum heating furnace while returning to atmospheric pressure;
A vacuum air supply means for supplying a gas containing the dioxins separated from the solid in each processing step of the three chambers to the electron beam processing means,
The electron beam processing means includes an irradiation chamber into which the gas supplied by the vacuum air supply means flows, and
An electron beam irradiation apparatus connected to the irradiation chamber and performing an electron beam irradiation process on the gas in the irradiation chamber;
The dioxin detoxification treatment apparatus according to claim 1, comprising:   The dioxin detoxification treatment apparatus according to claim 2, wherein the irradiation chamber has a gas swirling mechanism for swirling the gas that has flowed into the irradiation chamber.   The dioxin detoxification treatment apparatus according to claim 2 or 3, further comprising preheating drying means for preliminarily drying the solid containing the dioxins.   The said preheating drying means is equipped with the gas supply means which supplies the gas which generate | occur | produces by the preheat drying process of the said solid containing the said dioxins to the said electron beam processing means, It is characterized by the above-mentioned. Dioxin detoxification treatment equipment.   The electron beam processing means includes a mixing chamber for mixing a gas containing dioxins sucked from the vacuum heating means and the preheating drying means, and the gas mixed by the mixing chamber is supplied to the irradiation chamber. The dioxin detoxification treatment apparatus according to claim 5, wherein   The electron beam irradiation device controls the irradiation current amount of the electron beam irradiation device in conjunction with a concentration sensor that detects the concentration of dioxins contained in the gas flowing into the irradiation chamber, and the concentration sensor. The dioxin detoxification treatment apparatus according to any one of claims 2 to 6, further comprising an irradiation amount control mechanism.   The electron beam processing means includes a temperature sensor that detects the temperature of the gas flowing into the irradiation chamber, and a cooling gas blower that blows a cooling gas according to the temperature of the gas. The dioxin detoxification device according to any one of claims 2 to 7.

Images