JPH11207295A - Method and apparatus for treating halogen-containing matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve the recycling of resources by preventing the absorption of a halogen substance (especially, hydrogen chloride) by formed carbide, reducing the vol. of a matter to be treated containing a halogen substance by carbonation or the like and selecting carbonating and ashing means corresponding to the properties of the matter to be treated. SOLUTION: Waste is heat-treated by a decomposition means 10 to decompose and precipitate a halogen substance and, next, the residue from which the halogen substance is removed is sent to a plurality of vol. reducing means 2 and 2' and subjected to carbonizing treatment to be reduced in vol. and carbide containing no halogen substance is taken out. Treatment recovering a part of waste by carbonizing, ashing or carbonizing the waste by a plurality of the vol. reducing means to subject the same to ashing treatment is selected corresponding to the properties of the matter to be treated to treat the waste to enable the effective reutilization of the waste.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a halogen (chlorine,
The present invention relates to a treatment method and a treatment apparatus for treating an object to be treated such as waste containing a large amount of bromine and iodine by performing thermal treatment such as thermal decomposition, and particularly relates to a halogen substance (particularly, a halogen substance contained in the object to be treated). In a separate heat treatment furnace, a decomposition step of decomposing and separating chlorine) and a plurality of volume reduction steps of continuously or discontinuously reducing the volume of the material to be treated by carbonization or the like are performed in separate heat treatment furnaces. To prevent hydrogen chloride from remaining in the reaction,
The present invention relates to a processing method and an apparatus for enabling reuse as resources.

[0002]

2. Description of the Related Art General waste such as municipal waste, industrial waste, shredder dust, vinyl chloride and other wastes contain a large amount of halogen substances (chlorine, bromine, iodine, fluorine, astatine), especially chlorine components. If heat treatment such as incineration is performed, chlorine-based gas (hydrogen chloride,
Chlorine) is generated in large quantities, and highly toxic dioxins are generated in the generated gas (exhaust gas), residue after incineration (processed ash), and fly ash in the exhaust gas.

[0003] Therefore, the exhaust gas is reacted with slaked lime in a reaction tower, HCl and SOx are absorbed and fixed in the powder as CaCl ₂ and CaSO ₄ , and the HCl and SOx are removed from the exhaust gas. BACKGROUND ART A waste disposal method in which powder is removed together with dust is known.

[0004] However, in this treatment method, a high-concentration acidic gas is generated, and the waste treatment facility must have a corrosion-resistant structure, so that the facility cost is high.

[0005] In order to reduce the equipment cost, pyrolysis is performed using a single rotary processing furnace (rotary kiln), the discharged residue is incinerated by a post-stoker, and the pyrolysis gas is burned in a reburning chamber. After passing the generated hot gas through a boiler, etc.,
A treatment method has been proposed in which a slaked lime slurry is sprayed in the reaction tower and reacted with the exhaust gas in the same manner as described above (for example, JP-A-5-33916).

[0006] As another method, waste is heat-treated by a low-temperature carbonization method in a rotary processing furnace to convert it into a low-temperature carbonized gas and a pyrolysis residue, which is then burned in a high-temperature combustion furnace to form a molten liquid slag. There is known a method of cooling and solidifying it into a glassy state, and treating the generated gas with a boiler, a removal filter and a gas purifier to discharge the gas (for example, Japanese Patent Application Laid-Open No. 8-510789).

[0007]

In the conventional method for thermally decomposing an object to be treated, the object to be treated is supplied from one supply port of a single rotary processing furnace, and the carbide is discharged from the other outlet. In the process of discharging the carbide, the chlorine-based gas is decomposed and precipitated from the workpiece by heating the workpiece at 300 ° C. to 600 ° C. for about 1 hour with stirring. The temperature at which the gas decomposes and precipitates from the object to be processed is about 200 ° C. to 350 ° C., and the rotary processing furnace is filled with the chlorine-based gas that has decomposed and deposited, and at this point, dioxins are generated. there is a possibility.

Moreover, the object to be processed is moving while being stirred in the rotary processing furnace. Further, when the object to be processed is heated at a temperature of about 350 ° C., it becomes a carbide. If a chlorine-based gas and dioxins are generated and present in the inside, the chlorine-based gas and dioxins are adsorbed to the carbide. It is extremely difficult to remove dioxins once absorbed in the carbide.

[0009] Therefore, it is difficult to reuse the generated carbide, and it is necessary to detoxify it by a special means such as burying it in a final disposal site as a residue or melting it at a very high temperature.

Further, the properties (contents) of the non-processed material are not constant, and various cases include a large amount of metal and a case where the metal is not included. It is not preferable from the viewpoint of resource recycling to uniformly heat-treat.

Further, the heating temperature and the heating time differ depending on the object to be treated, and it is necessary to perform extremely complicated control by observing the properties of the object to be treated or effectively recovering the resources.

[0012] An object of the present invention is to provide a heat treatment furnace which performs heat treatment without causing a halogen substance (particularly, hydrogen chloride) to be absorbed by the generated carbide and by subjecting an object to be treated containing no halogen substance to carbonization or the like. It is an object of the present invention to reduce the volume and to make it possible to select the processing means of carbonization and incineration processing in accordance with the properties of an object to be processed, thereby effectively recycling resources.

[0013]

As a result of various experimental studies, the inventor of the present application has found a means for decomposing and depositing a chlorine-based gas, which causes the generation of dioxins, from an object to be treated, and a method for reducing the volume (carbonization) thereafter. It has been found that the above-mentioned problems can be solved if the means for performing (ashing) treatment is performed in another heat treatment furnace.

Further, a plurality of heat treatment furnaces are provided in the volume reducing step, and the material to be treated is carbonized according to the properties of the material to be treated.
It has been found that the resource can be effectively recycled if a part of the metal is recovered after the incineration or carbonization so that the incineration can be selectively performed.

Therefore, a means for solving the problem in the present invention is to heat-treat an object containing a halogen substance to decompose and precipitate the halogen substance, and then reduce the volume of the object to be treated. In the method of treating a material, a decomposition step of decomposing and separating a halogen substance from a substance to be treated and a volume reducing step of reducing the volume of the substance to be treated after decomposing and separating the halogen substance are performed in different heat treatment furnaces. The performed and volume reducing step is characterized in that carbonization and incineration are performed continuously or discontinuously in a plurality of heat treatment furnaces.

The heating temperature in the decomposition step is a temperature at which the halogen substance is decomposed and precipitated from the object to be treated, and is a temperature at which the object does not carbonize, for example, 200 ° C. to 350 ° C.

The volume reducing step is a step of continuously or discontinuously carbonizing or ashing an object to be processed in a plurality of heat treatment furnaces, and heating at a temperature at which the object to be processed is carbonized or incinerated. I do. The workpiece is generally carbonized at 350 ° C to 700 ° C,
Ashes above 800 ° C.

In this volume reduction step, after the material to be treated is carbonized, metals are separated and recovered, and other residues are carried out in another heat treatment furnace for incineration.

A processing apparatus for realizing the above-described processing method includes a decomposition heat treatment furnace for decomposing and depositing a halogen substance contained in the object to be processed, and a carbonization or the like of the object processed in the decomposition heat treatment furnace. A heat treatment furnace with a reduced volume, and a duct for guiding the object processed in the decomposition heat treatment furnace to a heat treatment furnace with a reduced volume, these decomposition heat treatment furnace and the furnace for volume reduction, A cylindrical body having a supply port for supplying the workpiece on one end side and a discharge port for discharging the workpiece on the other end side, and transferring the workpiece while stirring the inside of the cylindrical body from the supply port side to the discharge port side. And a heating means for heating the cylindrical body from the outside, and at least two volume-reducing heat treatment furnaces are provided and each of the supply ports and the discharge port of the decomposition heat treatment furnace are ducted. Communication, and means to reduce the volume depending on the nature of the material to be treated. -Option possible to be.

The arrangement of the two volume reducing heat treatment furnaces is as follows:
The duct is planar and disposed on both sides of the duct at right angles to the duct, and the decomposition furnace is disposed at the other end of the duct in a direction perpendicular or linear to the duct. In this case, a transfer means such as a conveyor or a screw for moving the object to be processed from the decomposition heat treatment furnace to the volume reduction heat treatment furnace is provided inside the duct.

This transfer means can also be provided by erecting a duct (vertically or inclined at a predetermined angle), disposing a heat treatment furnace at the upper part, and placing a heat treatment furnace with a reduced volume at the lower part, and allowing the object to flow down (special). Without any means of transport).

At this time, the heat treatment furnace for reducing the volume is arranged horizontally on both sides of the duct, or substantially parallel to one side of the duct.

The heat treatment in the decomposition heat treatment furnace is performed at a temperature of 200 ° C., which is a temperature at which a halogen substance is decomposed and precipitated from an object to be treated.
Heat treatment at 350 ° C. The two volume-reducing heat treatment furnaces select treatment means depending on the properties of the object to be treated.

The heat treatment in these decomposition and heat treatment furnaces may be performed in the same heat treatment furnace or in different heat treatment furnaces, separately for the step of drying the object to be treated and the step of decomposing the halogen substance.

The volume reduction in the above two volume reduction heating furnaces is performed by carbonizing, ashing, or carbonizing, collecting metals and selecting a processing means such as incineration. To process.
The treatment temperature varies depending on the nature of the object to be treated, but the carbonization treatment is performed at 350 ° C. to 700 ° C. at which the object is carbonized, and the incineration treatment is performed at 800 ° C. or more at which the incineration occurs.

The above-mentioned heating means is formed by a heating coil (resistor or induction heating) surrounding the cylindrical body, and is heated by energization, or a heating cylinder (gas duct) surrounding the cylindrical body is provided. Heating is performed by introducing a hot gas into the cylinder, or both heating means are used in combination.

The cylindrical body does not necessarily need to be rotatable, and means (such as a screw) for transferring the object to be processed may be provided fixedly. A driven gear is provided, and the driven gear is rotationally driven by a motor. Further, driven gears may be provided on the outer periphery of each cylindrical body of each heat treatment furnace, and these driven gears may be rotationally driven by a common motor.

By using the method and apparatus for treating a halogen-containing substance as described above, a proper volume reduction treatment can be performed in accordance with the properties of the object to be treated, and more complete detoxification of the reduced-volume treated substance can be achieved. Thus, the recycling of carbides or metals can be effectively realized.

Exhaust gas generated in the process of thermal decomposition and deposition of the halogen substance is subjected to removal of chlorine-based gas and generated dioxins by well-known means such as a conventional bag filter.

[0030]

Embodiments of the present invention will be described below with reference to the drawings. The present invention, as described above, as a processing apparatus for heat-treating an object to be processed containing a halogen substance,
Different heat treatment furnaces are used for the decomposition and heat treatment furnace that decomposes and separates the halogen substance from the object to be treated, and the volume reduction heat treatment furnace that reduces the volume of the object after decomposition and precipitation of the halogen substance by carbonization and the like. It is characterized in that it is configured as a furnace, and that at least two volume-reducing heat treatment furnaces are provided. FIG. 1 is a conceptual diagram of a waste treatment facility for explaining the basic concept.

In FIG. 1, reference numeral 10 denotes a decomposition heat treatment furnace;
Reference numerals 0 and 20 'denote two volume reducing heat treatment furnaces.
The decomposition heat treatment furnace 10 includes a rotatable cylindrical body 11, means for stirring and moving an object to be processed in the cylindrical body 11, and a gas duct formed around the outer periphery of the cylindrical body 11 to introduce a hot gas to form a cylindrical body. A heating cylinder 12 for heating the body 11, a supply port 13 provided at one end of the cylindrical body 11 to supply the object to be processed into the cylinder 11, and a supply port 13 provided at the other end of the cylindrical body 11. The cylindrical body 11 is rotated by a rotation driving means 15. The rotation driving means 15 includes a driving motor 15a, a driving gear 15b, and a driven gear 15c provided on the cylindrical body 11. 16 is a supply duct surrounding the supply port 13 side, 17 is a discharge duct surrounding the discharge port 14 side, 18 is a heating coil (induction heating or resistor)
The cylindrical body 1 is provided on the outer periphery of the cylindrical body 11 on both sides of the heating cylinder 12.
1 is provided in non-contact and close proximity, and together with the heating cylinder 12, constitutes a heating means.

In the figure, reference numeral 19 denotes a cylinder for mounting a temperature sensor;
Indicates a dynamic seal.

A plurality (two in this example) of reduced volume heating furnaces 20 and 20 'have the same basic configuration as the decomposition heating furnace 10. Therefore, 2 is the same or equivalent part.
The next digit of 0 is the same number (for example, 21 is a cylinder,
22 is a heating cylinder) The explanation is omitted.

Reference numeral 30 denotes a hopper, into which an object to be processed is put, and the object to be processed is transferred to the cylindrical body 11 through an opening / closing valve (opening / closing door) 31.
Is supplied from the supply port 13 into the cylindrical body 11. The material to be treated may be any of solid matter such as general waste and industrial waste, ash, and sludge.

The cylindrical body 11 of the decomposition heat treatment furnace 10 and the cylindrical body 21 of the volume-reduction heat treatment furnaces 20 and 20 'are arranged horizontally in the vertical direction (see FIG. 3). The discharge duct 17 and the supply port 23 of the cylindrical body 21 communicate with each other through an opening / closing valve (opening / closing door) 32, and the discharge side duct 27 of the cylindrical body 21 of the reduced volume heating furnace 20 has an open / close valve ( Communicates with a carbide hopper 34 via an opening / closing door 33,
The carbide or treated ash after the heat treatment is discharged.

Reference numeral 35 denotes a combustion device, for example, when burning LNG, burns LNG from the LNG tank 36 to generate hot gas. This hot gas is supplied into a heating cylinder 22 provided on the outer periphery of the cylindrical body 21 and heats the cylindrical body 21.
After being fed into the heating cylinder 12 of the cylindrical body 11 of the decomposition heat treatment furnace 10 through the connecting pipe 37 and heating the cylindrical body 11,
The exhaust gas is sent to an exhaust gas combustion unit 39 via a discharge pipe 38.

The combustion device 35 may be provided in each of the volume-reducing heat treatment furnaces 20 and 20 ', or a common device may be used.

Reference numeral 40 denotes a bag filter, which is a decomposition heat treatment furnace 1
In the duct 17 and the duct 2
6 and taken out through the pipe 41 by suction or the like,
After being combusted and cooled by the LNG once, it is made to react with the treating agent from the treating agent supply unit 42 to perform the detoxification treatment of the exhaust gas. The exhaust gas processed by the bag filter 40 is discharged to the exhaust gas combustion section 3.
It is sent to 9.

In the exhaust gas combusting section 39, the hot gas from the heating cylinder 12 and the exhaust gas from the bag filter 40 are subjected to a combustion treatment by LNG or the like, and a part of the generated hot gas is passed through a pipe 43.
To the heating cylinder 22 of the volume-reducing heat treatment furnace 20 via
The other is discharged from the chimney 44.

FIG. 2 is a longitudinal sectional view of the cylinders 11 and 21. The cylinders 11 and 21 have a plurality of blades S therein.
The object to be processed and the mixture of the object to be processed and the processing agent supplied inside are moved from the supply port side to the discharge port side while stirring. In order to smooth this movement, the cylindrical bodies 11, 21
May be installed with the supply port side inclined slightly higher than the discharge port side.

FIG. 3 shows the decomposition heating furnace of FIG.
The two volume-reducing heat treatment furnaces are first and second volume-reducing heat treatment furnaces, each of which is represented by volume reducing means 2 and 2 ', and the duct 3 is a schematic diagram schematically showing these. (A) is a side view,
(B) shows a front view.

The duct 3 is erected (upright or inclined) so that the material to be processed can easily flow down, and the disassembling means 1 is provided above the duct 3.
Are placed horizontally on one side of the duct 3, and the first and second volume reducing means 2, 2 'are arranged below the duct in the same direction as the disassembling means 1 and substantially parallel to the same surface of the duct. It is.

Reference numeral 4 denotes an opening / closing door (opening / closing valve) provided in the duct 3 and capable of adjusting the flow rate of the object to be processed.

Next, a series of processes will be described. First, LNG is burned by the combustion device 35 to generate a hot gas, which is supplied to the heating cylinders 22 and 12. If necessary, AC power is supplied to the heating coils 18 and 28 so that the cylindrical body 2
Heat 1,11. Next (or simultaneously) an object to be treated containing a halogen substance (by mixing a treating agent as necessary)
From the hopper 30 into the cylindrical body 11 of the decomposition furnace 10.

In the heat treatment in the decomposition furnace, heat treatment is performed at a temperature (200 ° C. to 350 ° C.) and a time at which a halogen substance, particularly a chlorine-based gas, is decomposed and deposited, depending on the properties of the object to be treated. Decomposed and precipitated from the processed product. The deposited gas is taken into the bag filter 40 from the ducts 17 and 26 via the conduit 41 and is reacted with the treating agent by the bag filter 40 for detoxification. This processing is a conventionally known processing means.

Although not shown, the bag filter 4
As a pre-process for taking the gas into zero, the gas is burned to remove tar components, and the gas is cooled to a temperature lower than the endurable temperature of the bag filter.

On the other hand, the object to be treated after the deposition of the halogen substance is transferred from the discharge port of the decomposition heat treatment furnace 10 to the cylindrical body 21 of the reduced volume heat treatment furnaces 20 and 20 ′ via the duct 17 and the opening / closing valve 32. It is sent to the supply port 23 and the temperature at which the material to be treated is carbonized (carbonization starts at about 350 ° C. for papers).
Heat to 350 ° C to 700 ° C and carbonize or 800 ° C
Heating is performed to reduce the volume by the incineration treatment.

In the carbonization or incineration treatment, the two volume reduction furnaces 20 and 20 'are selectively (non-continuously) used for carbonization or incineration depending on the properties of the material to be treated.

Since the chlorine-based gas components and dioxins do not exist in the volume-reducing furnaces 20 and 20 ′, these chlorine-based gas components and dioxins are added to the carbonized or incinerated workpiece. There is no adsorption.

The reduced object is discharged into the carbide bopper 34 via the duct 27 and the opening / closing valve 33.

The temperature control means of the decomposition and volume reduction heat treatment furnace is performed as follows. In the decomposition heat treatment furnace 10, a valve (open / close valve or three-way valve or the like) is provided in a communication pipe 37 between the volume-reduction heat treatment furnace 20 and / or the heating cylinder 22 of 20 ', and the opening / closing control of this valve allows Alternatively, a plurality of connecting pipes 37 are provided to select the number of pipes to be used by valve opening / closing control, or an alternating current supplied to the heating coil 18 or a means for controlling the frequency in the case of induction heating. In these controls, the gas concentration of HCl or the like in the duct 17 is automatically or manually controlled by the temperature detected by the gas concentration meter 45 or the temperature sensor provided in the temperature sensor mounting tube 19.

The temperature control means of the heat treatment furnaces 20 and 20 'for volume reduction are almost the same as those described above,
Mainly controls the LNG combustion means. These controls are also controlled by reflecting the temperatures detected by the gas concentration meters 46 and 47 for measuring the HCl concentration in the ducts 26 and 27 and the temperature sensor in the temperature sensor mounting cylinder 29.

In the embodiment shown in FIG. 1, blades are provided in a cylindrical body as means for stirring and moving an object to be processed in the decomposition and volume reduction heat treatment furnaces 10, 20, 20 '. It is the case that the cylindrical body itself is rotated to move, but it is not always necessary to rotate the cylindrical body, the cylindrical body is fixed, and a long screw body is provided in the internal axial direction,
The screw body may be driven to rotate from the outside.

In the above description, the heating means for heating the cylindrical body employs both heating by a hot gas and heating by a heating coil. However, any one of the heating means may be used.

Further, the volume reduction in the volume reduction heat treatment furnace is performed by carbonizing an object to be processed in one volume reduction heat treatment furnace, separating and recovering metals and the like, and reducing the other residues in the other volume reduction heat treatment furnace. It may be performed continuously, such as heating to a high temperature in a heat treatment furnace for incineration.

As described above, according to the present invention, at least one decomposition heat treatment furnace is provided to decompose and precipitate a halogen substance contained in an object to be treated, and to reduce the volume of the object to be treated containing no halogen substance by at least two. As a basic principle, volume reduction treatment is performed in a heat treatment furnace.
Alternatively, the present invention is not limited to FIG.

That is, FIG. 3 is a schematic view schematically showing the first embodiment of FIG. 1 as described above, and FIG.
(B) is a front view.

FIG. 4 is a front view of a schematic view of the second embodiment. The duct 3 is erected (upright or inclined), and the disassembling means 1 is set horizontally on one side of the upper part. The first and second volume reducing means 2 and 2 'are arranged horizontally on both sides of the duct with the duct 3 interposed therebetween, and one of them is used selectively (non-continuously).

FIG. 5 is a front view of a schematic view of the third embodiment, in which a discharge port side of the disassembling means 1 and a supply port side of the first volume reducing means 2 communicate with each other through a duct 3. The discharge port side of the first volume reducing means 2 and the supply port side of the second volume reducing means 2 'communicate with each other through a duct 3', and are carbonized by the first volume reducing means 2; This is a case where the remaining volume is collected, the remaining residue is ashed by the second volume reducing means 2 'and discharged, and the volume reducing means is used continuously.

[0060]

As described above, according to the present invention, a decomposition means for decomposing and depositing a halogen substance (particularly a chlorine-based gas or the like) contained in an object to be treated and a subsequent object to be treated are reduced in volume by heating. Since the volume reduction means and the separate heat treatment furnace are used, and at least two volume reduction means are provided,
In the process of the volume reducing means, the residue and the dioxins generated due to the halogen substance do not coexist, so that the dioxins do not adsorb and mix into the residue (carbide, ash). Therefore, the detoxification of the residue can be achieved, and metals and carbides can be taken out of the residue and reused, and environmentally preferable waste treatment can be performed.

In addition, since a plurality of heat treatment furnaces are provided in the volume reduction step, carbonization treatment,
Since it is possible to select a processing means such as an incineration treatment, a metal recovery after carbonization, and an incineration treatment, it is possible to obtain an effect such that resources can be effectively recycled.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a waste treatment facility according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a cylindrical body.

FIG. 3 is a schematic diagram of the first embodiment of the present invention.

FIG. 4 is a schematic diagram of a second embodiment of the present invention.

FIG. 5 is a schematic view of a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Decomposition means 2, 2 '... Volume reduction means 3 ... Duct 4 ... Opening / closing door 10, 20 ... Heat treatment furnace 11, 21 ... Cylindrical body 12, 22 ... Heating cylinder 13, 23 ... Supply port 14, 24 ... Discharge port 15, 25 rotational drive means 16, 26 supply duct 17, 27 discharge duct 18, 28 heating coil 19, 29 temperature sensor mounting cylinder 30 hopper 31, 32, 33 opening / closing valve 34 carbide Hopper 35 ... Combustion device 36 ... LNG tank 37 ... Connection pipe 38 ... Discharge pipe 39 ... Exhaust gas combustion section 40 ... Bag filter 41 ... Pipe line 42 ... Treatment agent supply section 43 ... Pipe line 44 ... Chimney 45, 46, 47 ... Gas Densitometer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B09B 3/00 301P

Claims (12)

[Claims] 1. A method for treating a halogen-containing substance, wherein the halogen substance contained in the substance to be treated is subjected to a heat treatment to decompose and precipitate the halogen substance and then reduce the volume of the substance to be treated. The decomposition step of decomposing and depositing and the volume reducing step of reducing the volume of the object after decomposition and deposition of the halogen substance are performed in different heat treatment furnaces. A method for treating a halogen-containing material, wherein carbonization and incineration are performed continuously or discontinuously in a furnace. 2. The method for treating a halogen-containing substance according to claim 1, wherein the heat treatment temperature in the decomposition step is a temperature at which the halogen substance is decomposed and precipitated from the object. 3. A heat treatment temperature in the decomposition step is 200 ° C. to 350 ° C. at which a halogen substance is decomposed and precipitated from the object to be treated.
The method for treating a halogen-containing substance according to claim 1, wherein: 4. The volume reducing step is characterized in that carbonization or incineration of the material to be processed is performed continuously or discontinuously.
A method for treating a halogen-containing substance as described in the above. 5. The halogen according to claim 1, wherein, in the volume reducing step, after carbonization, metals are separated and recovered, and other residues are performed in another heat treatment furnace for incineration. How to handle the inclusions. 6. The halogen-containing composition according to claim 1, wherein the heat treatment in the volume reduction step is performed at a temperature at which the material to be treated is carbonized or at a temperature at which the material to be treated is incinerated. How to handle things. 7. The method according to claim 1, wherein the heat treatment temperature in the volume reduction step is 350 ° C. to 700 ° C. at which the material to be treated is carbonized or 800 ° C. or more at which the material is incinerated. A method for treating a halogen-containing substance according to any one of the preceding claims. 8. A decomposition heat treatment furnace that decomposes and precipitates a halogen substance contained in an object to be treated, and a volume reduction heat treatment furnace that reduces the volume of the object treated by the decomposition heat treatment furnace by carbonization or the like. A duct for guiding the object to be processed in the decomposition heat treatment furnace to a volume reduction heat treatment furnace, wherein the decomposition heat treatment furnace and the volume reduction heat treatment furnace supply the object to be processed to one end side. A cylindrical body having a port and a discharge port on the other end side for discharging the same, means for transferring the inside of the cylindrical body from the supply port side to the discharge port side while stirring, and transferring the cylindrical body from the outside Halogen-containing material comprising: heating means for heating, wherein at least two volume-reducing heat treatment furnaces are provided, and respective supply ports and discharge ports of the decomposition heat treatment furnace are communicated by a duct. Processing equipment. 9. The duct is erected so that an object to be processed can flow down,
9. The apparatus for treating a halogen-containing material according to claim 8, wherein a decomposition heat treatment furnace is installed horizontally at an upper portion thereof, and a plurality of volume reducing heat treatment furnaces are arranged horizontally at a lower portion. 10. The apparatus for treating a halogen-containing substance according to claim 8, wherein the heat treatment furnace for reducing the volume is disposed on both sides of the duct. 11. The apparatus for treating a halogen-containing substance according to claim 8, wherein the heat treatment furnace for reducing the volume is arranged in parallel with one side surface of the duct. 12. A first and a second volume-reducing heat treatment furnace are provided, and a discharge side of a decomposition heat-treatment furnace and an supply side of the first volume-reduction heat treatment furnace arranged at an upper part of a duct are connected to each other. 10. A duct, and an outlet of the first volumetric heat treatment furnace and a supply side of the second volumetric heat treatment furnace communicate with another duct. An apparatus for treating a halogen-containing substance according to claim 1.