JPH11226546A - Apparatus for treating halogen-containing substance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make generated gas and a residue harmless by producing harmless chlorides by installing at least two units of decomposition reaction means which decompose and deposit halogen substances (especially chlorine type gas and others) contained in a material to be treated and simultaneously reacts them with an alkaline substance in another heat treatment furnace. SOLUTION: In an apparatus for treating halogen-containing substances, waste and an alkaline substance are heat-treated separately in decomposition and reaction means 1 and 1', and halogen-containing substances are decomposed and deposited and simultaneously contacted and reacted with the alkaline substance to produce harmless chlorides to make the generated gas and the residue harmless. Next, a treated material is carbonized (converted into ash) by another volume reducing means 2 to reduce its volume, and a carbonized material not containing the halogen substances is taken out to be reused.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a halogen (chlorine,
(Bromine, iodine, etc.) Waste treatment equipment that contains a large amount of waste, etc., by performing thermal treatment such as thermal decomposition to treat the treatment equipment, especially, a plurality of heat treatment furnaces in the previous decomposition reaction process When decomposing and precipitating halogen substances (especially chlorine) contained in the material to be treated, it is contact-reacted with an alkaline substance and replaced with harmless chlorides to prevent the generation of harmful dioxins. At the same time, the detoxification of the exhaust gas and the object to be treated are made harmless, and in the next step, the volume of the detoxified object is reduced by carbonization or incineration in a separate heat treatment furnace from the previous step. The present invention relates to a processing apparatus for performing a reaction so that a halogen substance does not react and remain in a residue.

[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) generates a large amount of gas, generates generated gas (exhaust gas), residue after incineration (processed ash), and produces highly toxic dioxins in fly ash in the exhaust gas, causing problems such as environmental pollution and deterioration of incineration equipment. generate. Therefore, technology for solving these problems has been developed, and the following technology is currently disclosed.

(1) Treatment method by incineration This method involves incinerating an object to be treated such as waste in an incinerator. At the time of incineration, an alkaline substance (lime powder) is sprayed into the incinerator. Then, it is made to react with chlorine-based gas in the exhaust gas generated by incineration to generate harmless chloride (calcium chloride), thereby making the exhaust gas harmless (for example, JP-A-54-93864).

(2) Treatment method by dry distillation (pyrolysis) As this treatment method, pyrolysis is performed using a single rotary processing furnace (rotary kiln), and the discharged residue is incinerated by a later stoker, and pyrolyzed. A method is proposed in which the gas is burned in a reburn chamber, the generated high-temperature gas is passed through a boiler, etc., and then guided to a reaction tower, where the slaked lime slurry is sprayed and reacted with the exhaust gas in the same manner as described above. (For example, JP-A-5-33916).

Further, the 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 burned in a high-temperature combustion furnace to produce a molten liquid slag. There is also proposed a method of cooling and solidifying into a glass state, and treating the generated gas with a boiler, a removal filter and a gas purifying device and discharging the gas (for example, Japanese Patent Application Laid-Open No. H8-86,838).
510789).

As another method, when an object to be treated is heat-treated in a heat treatment furnace, an appropriate amount of an alkaline additive which easily reacts with the chlorine component is mixed and heat-treated to fix the chlorine component in the treated ash. A method has also been proposed in which harmless exhaust gas is obtained by converting the treated ash to a chlorine component by washing with water or the like (JP-A-9-155326).

[0007]

The above-mentioned method based on incineration treatment is a treatment at a place close to the generation source because the alkali substance is sprayed into the incinerator. After processing.

Therefore, according to this method, although the chlorine-based gas removal effect can be expected to some extent, it is difficult to sufficiently satisfy the emission standard values of various gases according to the revised laws and regulations.

[0009] Moreover, because of incineration, the reaction temperature is high, and it is difficult to maintain a stable reaction. Further, spraying a large amount adversely affects the original combustion (generation of unburned phenomena), making it difficult to satisfy the emission standard values of various gases according to laws and regulations.

[0010] Further, in the method based on the dry distillation treatment, the object to be treated is thermally decomposed without burning, so that the instability factor as in an incinerator is easily removed. However, when the alkali substance is sprayed into the heat treatment furnace as in the incinerator, only the same effect as in the case of the incineration treatment can be expected.

In each of the above-mentioned treatment methods, when the exhaust gas contains a large amount of a halogen substance (particularly, a chlorine-based gas), the facilities such as the heat treatment furnace and the flue are significantly corroded, and the durability of the facility is increased. This may lead to a decrease in exhaust gas, leakage of exhaust gas, etc., which makes maintenance difficult.

In any of the above-described treatment methods, after a chlorine-based gas is once generated from an object to be treated, a chlorine-based gas and dioxins are removed in a subsequent step (by means such as a bag filter or combustion). There is a problem.

In order to solve these problems, the applicant of the present application has proposed to mix an alkaline additive during the heat treatment (Japanese Patent Application Laid-Open No. Hei 9-15532).
6).

In each of the above-mentioned treatment methods by dry distillation, the treatment for thermally decomposing an object to be treated to deposit a decomposition gas is performed in a single treatment furnace. In other words, the process is performed in a series of processes in which an object to be processed is supplied from one supply port of a single processing furnace and carbide is discharged from the other discharge port. In this series of processes,
Heating treatment (for example, 1 hour,
(300 ° C. to 600 ° C.), the processing of drying → pyrolysis → volume reduction (carbonization) of the object is continuously performed.

The temperature at which a halogen substance is thermally decomposed and deposited from an object to be treated is about 200 ° C. to 350 ° C., and the halogen substance decomposed and deposited in a processing furnace, particularly a chlorine-based gas, is easily filled. State.

Therefore, there is a possibility that dioxins are produced at this point.

Further, the object to be treated is agitated, and the generated chlorine-based gas is easily entrained in the object to be treated. If the object to be treated is heated to a temperature of 350 ° C. or more to form a carbide, Will be adsorbed.

[0018] The carbide, chlorine-based gas,
If the generated dioxins are present at the same time, the carbides will adsorb these chlorine-based gases and dioxins, and it is very difficult to remove the once adsorbed dioxins from the carbides.

Therefore, it is difficult to reuse the generated carbide, and it is necessary to bury it as a residue in a final disposal site or to process it by another means such as melting at a very high temperature.

Further, the properties of the object to be processed are not constant, and may vary greatly depending on the time and place.
The heat treatment furnace is controlled by controlling the heating temperature and the heat treatment time depending on the properties of the object to be treated. However, there is a limit in performing the heat treatment in a single heat treatment furnace.

Therefore, the problem to be solved by the present invention is that a halogen substance (particularly, hydrogen chloride) decomposed and precipitated from an object to be treated according to the properties of the object at the time of decomposition treatment of the object and an alkaline substance. By contact reaction to form harmless chlorides, thereby realizing the harmlessness of exhaust gas and residue, and reducing the volume of this harmless residue by carbonization in another treatment furnace, enabling reuse. Is to do.

[0022]

It has been known that a halogen substance (particularly, a chlorine-based gas) and an alkali substance react with each other to form harmless chloride when they come into contact with each other. As a result of the experimental study, the researchers added an alkaline substance to the material to be treated and heat-treated, so that hydrogen chloride came into contact with the alkaline substance immediately after decomposition and deposition to produce harmless chloride, Exhaust gas and residue can be detoxified, eliminating the need for conventional detoxification of exhaust gas containing chlorine-based gas. And if the heat treatment furnace of the decomposition reaction step of the previous step and the heat treatment furnace of the volume reduction heat treatment step of the subsequent step are treated in separate treatment furnaces, the treatment is performed in a single heat treatment furnace as in the conventional case. In comparison with the case, the decomposed halogen substance (particularly, chlorine-based gas) is not trapped and left in the object to be stirred, and further, when heat treatment is performed in a heat treatment furnace, It was also found that the conditions under which the halogen substance was decomposed and precipitated differed depending on the properties of the object to be treated, and it was difficult to perform a suitable treatment using only a single heat treatment furnace. The present invention has been made based on the results of these experimental studies.

Therefore, a specific means of solving the problem according to the present invention is to provide a halogen-containing substance treating apparatus which performs a thermal treatment such as thermal decomposition on an object to be treated containing a halogen substance and then reduces the volume by carbonization or the like. Decomposes and decomposes halogen substances from the material to be treated by thermal treatment, and makes it harmless by producing a harmless chloride by contact reaction with an alkali substance. A reaction treatment furnace, a reduced volume heat treatment furnace for reducing the volume of the object processed in the decomposition reaction furnace, and a duct for guiding the object processed in the decomposition reaction furnace to the volume reduced heat treatment furnace. The decomposition reaction processing furnace and the volumetric heat treatment furnace each have a cylindrical body having a supply port for supplying an object to be treated at one end and a discharge port for discharging the substance at the other end, and an inside of the cylindrical body. From the supply port side to the discharge port side A means for transferring the material while stirring it, and a heating means for heating the cylindrical body from the outside, wherein at least two decomposition reaction treatment furnaces are provided, each of which has an outlet, and the volume reduction heat treatment furnace The supply port is communicated with a duct, and the temperature or the heating time of the decomposition reaction processing furnace can be individually controlled depending on the properties of the processing object.

Further, the two decomposition reaction furnaces are arranged in a state where the duct is turned down, and the duct is sandwiched between the two ends at right and left ends thereof. It is arranged at the other end of the duct in a direction perpendicular to the duct or in a straight line direction. In this case, a transfer means such as a conveyor or a screw for moving an object to be processed from the decomposition reaction processing furnace to the volume reduction heating processing 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 decomposition reaction 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 decomposition reaction treatment furnace is arranged on both sides of the duct so as to be laterally arranged, or is arranged substantially parallel to one side of the duct.

The heat treatment in these decomposition reaction treatment furnaces is performed at a temperature of 200 ° C. to 350 ° C., which is a temperature at which the halogen substance is decomposed and precipitated from the object to be treated. The two decomposition reaction processing furnaces can individually control the temperature or the heating time depending on the properties of the object to be processed.

The heat treatment in these decomposition reaction 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 treatment in the above-mentioned volume reduction heat treatment furnace is performed by carbonization or incineration at a temperature of 350 ° C. to 700 ° C. at which the material to be treated is carbonized, or at an incineration temperature of 8%.
Treat at 00 ° C or higher.

The 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 is not necessarily required to be rotatable, and means (such as a screw) for transferring the object to be processed may be provided in a fixed manner. A driven gear is provided, and the driven gear is rotationally driven by a motor. Further, driven gears are provided on the outer periphery of each cylindrical body of the heat treatment furnace installed above and below, and both driven gears are rotationally driven by a common motor.

By using the apparatus for treating a halogen-containing substance as described above, decomposition and precipitation of a halogen substance and a contact reaction treatment with an alkali substance can be appropriately performed in accordance with the properties of a substance to be treated, thereby reducing the volume. More complete detoxification of objects can be realized.

The exhaust gas in each of the above heat treatment furnaces is:
The waste gas is treated by known exhaust gas combustion means or a known means such as a bag filter, and then released into the atmosphere.

[0034]

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,
Two decomposition reaction furnaces for decomposing and depositing a halogen substance from an object to be treated, and a volume reduction heat treatment furnace for reducing the volume of the object to be treated after decomposing and depositing the halogen substance by carbonization or the like. It is characterized in that it is configured as a different heat treatment furnace and provided with at least two decomposition reaction treatment furnaces. FIG. 1 is a conceptual diagram of a waste treatment facility for explaining the basic concept.

In FIG. 1, reference numerals 10 and 10 'denote decomposition reaction processing furnaces, and reference numeral 20 denotes a volume reduction heating processing furnace. The decomposition reaction processing furnaces 10 and 10 ′ include a rotatable cylindrical body 11 and the cylindrical body 1.
A heating cylinder 12 for forming a gas duct on the outer periphery of the cylindrical body 1 and introducing a hot gas to heat the cylindrical body 11, and a supply port provided at one end of the cylindrical body 11 for supplying an object to be processed into the cylindrical body 11; 13 and an outlet 1 provided at the other end of the cylindrical body 11
4 and the cylindrical body 11 is rotationally driven by the rotational 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), and the outer circumference of the cylindrical body 11 on both sides of the heating cylinder 12. In addition, the heating means is provided in a non-contact and close proximity to the cylindrical body 11 and constitutes a heating means together with the heating cylinder 12.

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

The decomposition reaction processing furnaces 10, 10 '
As shown by (1) and (1 '), two units having the same configuration are provided.

The volume reducing heat treatment furnace 20 has the same basic configuration as the decomposition reaction treatment furnace 10 described above. Therefore, the same or corresponding part is designated by the same digit after 20 (for example, 21 is a cylindrical body, 22 is a heating cylinder), and description thereof is omitted.

Numeral 30 denotes a hopper, which mixes and throws in an object to be treated and a treatment agent comprising an alkaline substance, and feeds the mixture from the supply port 13 of the cylinder 11 through an opening / closing valve (opening / closing door) 31.
Supply within 1. The material to be treated may be any of solid matter such as general waste and industrial waste, ash, and sludge.

The hopper 30 has a crushing function and a function of mixing the processing agent, and may mix the processing agent while crushing the solid material, or may mix the processing object with the processing agent crushed in advance. May be mixed and charged.

The cylindrical body 11 of the decomposition reaction processing furnaces 10 and (10 ') and the cylindrical body 21 of the volume reduction heating processing furnace 20 are disposed horizontally in the vertical direction. 17 and the supply port 23 of the cylindrical body 21 are communicated via an opening / closing valve (opening / closing door) 32.
The discharge side duct 27 of the cylindrical body 21 communicates with the dissolving tank 34 via an opening / closing valve (opening / closing door) 33, and discharges the residue after the heat treatment and the reacted processing agent.

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.
It is fed into the heating cylinder 12 of the cylindrical body 11 of the decomposition reaction processing furnace 10 and (10 ') through the connecting pipe 37, and after heating this cylindrical body 11, it is sent out to the drying means 39 through the discharge pipe 38. Then, after being used as heat of the drying means, it is sent to the combustion means 42 via the pipe 41.

The combustion means 42 is provided on the discharge side duct 17 of the decomposition reaction process 10 and the supply side duct 2 of the volume reducing heat treatment furnace 20.
The gas in 6 and the gas sent from the combustion device 35 and used for each heating unit are burned and sent to the bag filter 40 in the next step.

The combustion means 42 burns the gas to remove the tar component, and cools and sends the gas to a temperature lower than the endurable temperature of the bag filter 40.

In the bag filter 40, after the reaction treatment with the treating agent, the unreacted treating agent is sent to the hopper 30 for reuse.
The exhaust gas is sent to an exhaust gas combustion section 43, where the exhaust gas is subjected to combustion processing by LNG or the like, and is discharged from a chimney 44.

Dehydration means 45 separates the aqueous solution in the dissolving tank 34 into solid and liquid, and the solid is dried by the drying means 39.
The liquid discharged to the carbide hopper 46 is neutralized by a water treatment means 47 with a neutralizing agent or the like, and then returned to the dissolving tank 34 for reuse.

FIG. 2 is a longitudinal sectional view of the cylinders 11 and 21 having 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 two decomposition reaction furnaces 10 and 10 ′ of the processing apparatus of FIG. 1 as decomposition reaction means 1 and 1 ′, a volume reduction heating processing furnace 20 as volume reduction means 2 and a duct 3. (A) is a side view, (B)
Shows a front view.

The duct 3 is erected (upright or inclined) so that the volume of the material to be treated can be easily reduced, and two decomposition reaction means 1 and 1 ′ are provided above the duct 3 so as to be substantially parallel to the same surface of the duct 3. And the volume reducing means is disposed below the duct in the same direction as the decomposition reaction means.

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

Next, a series of processing methods will be described.
First, LNG is burned by the combustion device 35 to generate 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 at the same time) a mixture of an object to be treated containing a halogen substance and a treatment agent made of an alkali substance, or the mixture is supplied from the hopper 30 into the cylindrical body 11 of the decomposition reaction processing furnace 10, 10 'while being mixed. I do. Here, the substrate is heated at a temperature of 200 ° C. to 350 ° C., which is a temperature at which a halogen substance (particularly, a chlorine-based gas) is decomposed and deposited, so that a chlorine-based gas and the like are decomposed and deposited from the object. At the time of this precipitation, the chlorine-based gas, etc. reacts with the alkaline substance of the treating agent being added and is replaced and generated with harmless chlorides. Detoxification can be realized.

The heat treatment in the decomposition reaction furnaces 10 and 10 'is carried out by separating them according to the properties of the object to be treated and supplying them separately to the respective decomposition reaction furnaces 10 and 10' to analyze the halogen substances contained in the object to be treated. The discharge temperature or the processing time are adjusted according to the properties.

The object after the halogen substance is precipitated and made harmless is sent to the supply port 23 of the cylindrical body 21 of the volume-reducing heat treatment furnace 20 through the duct 17 and the opening / closing valve 32, where the object is treated. The temperature at which the treated product is carbonized (paper begins to carbonize at about 350 ° C.) Carbonization is performed by heating to 350 ° C. to 700 ° C. or ashing is performed by heating to 800 ° C. or more to reduce the volume. Since the chlorine-based gas components and dioxins do not exist in the volume-reducing heat treatment furnace 20 in the volume-reducing step, these chlorine-based gases and dioxins are adsorbed on the carbonized or incinerated material to be treated. Never.

The reduced volume of the object to be processed and the reacted processing agent are passed through the duct 27 and the opening / closing valve 33 to the melting tank 34.
Is discharged into In the dissolving tank 34, the reduced volume of the object to be treated, the treated agent after the reaction, and the like are dissolved in water, and this is separated into a solid and a liquid by a dehydrating means 45, and the solid is dried. After drying at 39, the liquid is taken out from the carbide hopper 46. On the other hand, the liquid is recovered by treating the treated agent with the water treatment means 47, injected with a neutralizing agent and the like, treated, and returned to the dissolution tank 43 for reuse. .

The temperature control means of the decomposition reaction processing furnace and the volume reduction heating processing furnace is performed as follows. In the decomposition reaction processing furnaces 10 and (10 ′), a valve (open / close valve or 3) is connected to the communication pipe 37 with the heating cylinder 22 of the volume reduction heating processing furnace 20.
Means for controlling the opening and closing of this valve, or for providing a plurality of connecting pipes 37 to select the number of tubes to be used by controlling the opening and closing of the valve, or for the alternating current supplied to the heating coil 18 or the frequency in the case of induction heating. Is performed by means for controlling 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 volume-reducing heat treatment furnace 20 is substantially the same as that described above.
The main control is NG combustion means. These controls are also performed by a gas concentration meter 4 for measuring the HCl concentration in the ducts 26 and 27.
6, 47 and the temperature detected by the temperature sensor in the temperature sensor mounting cylinder 29 is controlled.

In the embodiment shown in FIG. 1, as means for stirring and moving an object to be treated in a decomposition reaction furnace and a volume reducing heat treatment furnace, blades are provided in the cylinder to form the cylinder itself. It is a case where the cylindrical body is rotated and moved, but it is not always necessary to rotate the cylindrical body, the cylindrical body is fixed, a long screw body is provided in the internal axial direction, and the screw body is rotationally driven from the outside. You may do so.

Further, as the heating means for heating the cylindrical body, a case has been described in which both heating by a hot gas and heating by a heating coil are applied, but either one of the heating means may be used.

As described above, according to the present invention, at least two decomposition reaction furnaces are provided, and an object to be processed having a different property can be heat-treated in each of the decomposition furnaces, so that a halogen substance contained in the object to be processed is provided. Is effectively decomposed and precipitated, and at the same time, the precipitated gas reacts with an alkali substance to make it harmless, and the harmless processed material is reduced in volume in another heat treatment furnace. The number of furnaces and the method of arranging them can be realized by arbitrarily selecting according to the conditions of the installation place and the like. The embodiment will be described with reference to a schematic diagram.

Now, as described above, decomposition reaction furnaces 10 and 10 'for decomposing and depositing a halogen substance and reacting with a processing agent.
Are the decomposition reaction means 1 and 1 ', the volume reduction heat treatment furnace for reducing the volume of the object to be treated after deposition is volume reduction means 2 and the duct 3 are, the processing apparatus of FIG. The form is schematically shown in FIG.

FIG. 4 is a schematic view of the second embodiment, in which (A) shows a side view and (B) shows a front view, in which a duct 3 is erected (upright or inclined), In this case, the decomposition reaction means is disposed horizontally on both sides of the duct with the duct being interposed therebetween, and the volume reducing means is disposed horizontally below the duct.

FIG. 5 shows a third embodiment in which (A) is a plan view and (B) is a front view, in which a duct 3 is arranged on a plane, and one end of the duct 3 sandwiches the duct 3. The decomposition reaction means 1 and 1 'are arranged at the other end of the duct 3, and the volume reducing means 2 is arranged in a plane and at right angles to the duct. In this case, means for transferring the object to be processed is provided in the duct 3.

FIG. 6 shows a fourth embodiment, in which (A) is a plan view and (B) is a front view. This embodiment is a case where the volume reducing means 2 of the third embodiment is arranged at the end of the duct 3 in the axial direction of the duct.

[0064]

As described above, according to the present invention, the decomposition reaction means for decomposing and depositing a halogen substance (particularly, a chlorine-based gas or the like) contained in an object to be treated and simultaneously reacting it with an alkali substance is separately subjected to heat treatment. The following effects are obtained because the reaction is carried out in a furnace and at least two decomposition reaction means are provided.

(1) In the decomposition reaction step of decomposing and depositing a halogen substance (chlorine-based gas or the like) contained in the object to be treated, the object to be treated and the added alkali substance are heated together to obtain a minute analysis. The contact reaction between the emitted chlorine-based gas and the alkali substance is quickly and reliably performed, and harmless chlorides are generated to make the generated gas and residue harmless, and no chlorine-based gas remains in the exhaust gas. Dioxin formation can be prevented.

Further, the flue gas is not corroded and the exhaust gas is heated to a high temperature or the temperature is high, so that it can be used safely as a heat source and fuel.

(2) The volume reduction step of heating and reducing the volume of the object to be treated from which the chlorine-based gas has been removed is performed in a heat treatment furnace different from the heat treatment furnace in the previous decomposition reaction step. In the consolidation step, dioxins generated due to halogen substances do not exist in the residue, so that the dioxins do not adsorb and mix in the residue (carbide, ash), and the residue can be made harmless. Metals and carbides can be extracted from the residue and reused.

(3) By providing a plurality of decomposition reaction means, they can be properly used according to the properties of the object to be treated, and a heat treatment suitable for the object can be performed, and dioxins do not remain in the residue. .

(4) It is possible to easily cope with the processing at the time when the objects to be processed are concentrated (year-end, new year, etc.).

[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.

FIG. 6 is a schematic diagram of a fourth embodiment of the present invention.

[Explanation of symbols]

 1, 1 'decomposition reaction means 2 volume reduction means 3 duct 4 opening / closing door 10, 10' decomposition reaction processing furnace 20 volume reduction heating processing furnace 11, 21 cylindrical body 12, 22 heating cylinder 13 , 23 ... supply port 14, 24 ... discharge port 15, 25 ... rotation driving means 16, 26 ... supply side duct 17, 27 ... discharge side duct 18, 28 ... heating coil 19, 29 ... temperature sensor mounting cylinder 30 ... hopper 31, 32, 33 ... open / close valve 34 ... melting tank 35 ... combustion device 36 ... LNG tank 37 ... communication pipe 38 ... discharge pipe 39 ... drying means 40 ... bag filter 41 ... pipe line 42 ... combustion means 43 ... exhaust gas combustion part 44 ... Chimney 45 ... Dehydration means 46 ... Carbide hopper 47 ... Water treatment means

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B09B 3/00 304H

Claims (9)

[Claims] An apparatus for treating a halogen-containing substance, which comprises subjecting the substance to be treated containing a halogen substance to thermal treatment such as thermal decomposition and then reducing the volume by carbonization or the like. While decomposing and precipitating a substance, a decomposition reaction furnace for detoxifying exhaust gas and detoxifying an object to be treated by producing a harmless chloride by contacting and reacting with an alkali substance, A heat treatment furnace for reducing the volume of the treated object; and a duct for guiding the material treated in the decomposition reaction furnace to the heat treatment furnace for reducing the volume. The consolidation furnace has a cylindrical body having a supply port for supplying an object to be processed at one end and a discharge port for discharging the supply port at the other end.
Means for transferring the object to be processed while stirring the inside of the cylindrical body from the supply port side to the discharge port side; and heating means for externally heating the cylindrical body, wherein the decomposition reaction processing furnace has at least two units. A discharge device for halogen-containing substances, wherein each discharge port is provided to communicate with a supply port of the heat treatment furnace for reducing volume by a duct. 2. The duct is erected so that an object to be treated can flow down.
2. The apparatus for treating a halogen-containing substance according to claim 1, wherein a decomposition reaction treatment furnace is set horizontally at an upper portion thereof, and a volume reduction heat treatment furnace is set horizontally at a lower portion. 3. The apparatus for treating a halogen-containing substance according to claim 1, wherein the decomposition reaction treatment furnace is disposed on both sides of the duct. 4. The apparatus for treating a halogen-containing substance according to claim 1, wherein the decomposition reaction treatment furnace is arranged parallel to one side surface of the duct. 5. The halogen-containing substance according to claim 1, wherein the heat treatment in the decomposition reaction treatment furnace is performed at a temperature at which a halogen substance is decomposed and precipitated from the object to be treated. Processing equipment. 6. The heating temperature in the decomposition reaction treatment furnace is 200 ° C. to 35 ° C. at which a halogen substance is decomposed and precipitated from the object to be treated.
The apparatus for treating a halogen-containing substance according to any one of claims 1 to 5, wherein the temperature is 0 ° C. 7. The method according to claim 1, wherein the heat treatment in the decomposition reaction treatment furnace is performed in the same heat treatment furnace or in different heat treatment furnaces separately for the drying step and the halogen substance decomposition reaction step. An apparatus for treating a halogen-containing substance according to claim 1. 8. The volume reduction treatment in the volume reduction heat treatment furnace is a carbonization or incineration treatment.
Or a treatment device for halogen-containing substances according to 2. 9. The volume reduction treatment temperature in the volume reduction heat treatment furnace is 350 ° C. to 700 ° C. at which the material to be treated is carbonized or 800 ° C. or more at which the object is incinerated.
The apparatus for treating a halogen-containing substance according to any one of claims 2 and 8.