JP3277826B2 - Detoxification of industrial waste containing organic chlorine compounds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detoxifying industrial waste containing organic chlorine compounds such as PCBs, for example, transformers and capacitors, and more particularly to a method for generating no dioxin, dibenzofuran or the like (hereinafter referred to as DXN). With the goal. Here, the organic chlorine compound includes polychlorinated biphenyl (hereinafter referred to as PCB), chlorobenzene,
Other various natural and synthetic organic chlorine compounds.

[0002]

2. Description of the Related Art Conventionally, power distribution transformers mounted on telephone poles and the like in Japan use PCB or P as insulating oil.
Insulating oil containing CB was used, but the use of PCB was banned since 1976. Therefore, whether the transformer used up to that point is removed and stored as it is,
Or at present, some transformers are used as they are.

[0003] Here, PCB is a generic term for biphenyl chloride having two benzene rings bonded to each other.
It is a mixture of 3, 4, 5 or 6 linked compounds. P
CB is physically and chemically stable, and has excellent heat resistance and electrical insulation properties, so it can be used alone or mixed with other organic chlorine compounds as an insulating oil for electrical equipment or as a heat carrier. Have been used.

[0004] However, although the amount of the stored transformer is uncertain, one theory states that it may reach one million tons. These transformers are not kept in final disposal but are merely stored, which is a major social problem. In addition, it has been reported that a part of the transformer contains a small amount of PCB, and it is desired that any of these transformers is finally treated to be harmless.

However, when trying to decompose the above-mentioned transformer insulating oil containing PCB by the conventional oxidative combustion method, P
CB and insulating oil are organic chlorine compounds, and dioxins (hereinafter referred to as DXN) are generated during combustion of the organic chlorine compounds, which poses a serious problem for the health of the people. This DXN is a carcinogenic harmful substance generated when organochlorine compounds are burned at high temperatures of several hundred degrees in the presence of oxygen.

[0006] The occurrence of such DXN in Japan is a major problem from the viewpoint of public health and health. Regarding incinerators and the like, which are the largest sources of DXN, for example, foreign countries are tightening regulations. On the other hand, in Japan, guidelines are provided for controlling DXN to 0.5 ngNm ³ or less per 1 m ^{3 of} exhaust gas only for newly built incinerators.

At present, landfill disposal is the main disposal method for industrial waste containing organic chlorine compounds because harmful gases including DXN are generated. However, securing these disposal sites is becoming stricter year by year, and it is desired to make the waste harmless by incineration. Therefore, a treatment method that does not include DXN in exhaust gas at the time of incineration is expected.

Here, dioxins, that is, DXN,
Abbreviation of polychlorinated dibenzoparadioxins (PCDDs). There are as many as 75 homologues and isomers depending on the number of chlorine substitutions and differences in positions. Also contaminating the environment with this is polychlorinated dibenzofurans (PCDFs), and there are 135 homologues and isomers. This PCDDs
And PCDFs are collectively referred to as dioxins. Generally, the most toxic of dioxins is 2,
3,7,8-Paradioxine tetrachloride (2,3,7,8-
T ₄ CDD).

Here, the chemical structural formula of DXN is shown below.
As is apparent from this structural formula, the compound has a chemical structural formula in which one or two oxygen atoms are bonded to two benzene rings containing chlorine. PCDDs consist of two chlorine-containing benzene rings
Of oxygen combine to form PCDF. Has one oxygen linking two benzene rings containing chlorine. From the above structure, D
It is considered that XN may be generated when the organic chlorine compound is burned under the condition that oxygen remains in the combustion gas.

[0010]

Embedded image

The toxicity of DXNs varies greatly depending on homologues and isomers. Therefore, a toxicity conversion coefficient (TEF) is given to these homologs and the like, and an international toxicity conversion coefficient is generally used. Also in the present specification, the amount of DXN is indicated using this toxicity conversion factor (TEF).

Due to the above background, various techniques for incinerating organochlorine compounds have been developed to minimize the generation of DXN. According to Mitsui Engineering & Shipbuilding Technical Report No. 151 (February 1994), in August 1991, the company introduced a pyrolysis, melting, and valuable resource recovery system for incineration of municipal solid waste from Siemens AG of Germany. However, DXN concentration in exhaust gas is 1ng
It is said that TEQ / Nm ³ or more, which leaves an environmental problem.

K. Durai-Swamy et al. Have disclosed a method of burning biomass waste from a paper mill using a fluidized bed gasifier (Tappi Journal, October 1991, pp. 137-14).
3.), about 100 ppt DXN in the ash in the cyclone
Has been found, and this method also has environmental problems.

[0014]

An object of the present invention is to provide a method for treating industrial waste containing an organic chlorine compound such as PCB which does not generate DXN, for example, a transformer and a capacitor containing PCB and the like. It is an object of the present invention to provide a method for treating a chlorine compound so that gas generated when the compound is treated can be effectively reused.

[0015]

Means for Solving the Problems The present inventors have noticed that DXN is formed by combining two chlorine-containing benzene rings with one or two oxygen atoms, and that DXN is combined with other elements in the combustion gas. Focusing on the fact that DXN would not be generated if the organochlorine compound was thermally decomposed in the absence of unbound free oxygen gas, an experiment was conducted to thermally decompose the organochlorine compound. Invented the following inventions.

The first invention is a method for detoxifying industrial waste containing an organic chlorine compound, comprising the following steps. (A) charging industrial waste from which an organochlorine compound has been extracted into a reducing melting furnace, and (b) supplying electricity while maintaining the atmosphere in the melting furnace at a reducing property.
Gas energy and fuel supplied into the furnace from outside the furnace , or furnace
Heating at 1100 ° C. or higher with fuel supplied from outside to the furnace , (c) dissolving the metal component contained in the industrial waste and discharging from the melting furnace, (d) in the melting furnace The generated gas is retained in a gas decomposition furnace at 1100 ° C. or higher for 1 second or more to decompose the organochlorine compound in the gas and discharged. (E) At least this gas is discharged from the gas discharged from the gas decomposition furnace. The HCl contained therein is adsorbed and absorbed by water and then discharged to the outside.

In the above-mentioned reducing melting furnace, insulating oil containing PCB or the like is easily extracted, and the metal portion to which the insulating oil is adhered is charged and melted. The attached insulating oil is thermally decomposed in a reducing atmosphere, decomposed into CO, H ₂ , HCl, etc., and the generated exhaust gas is further retained in a gas decomposition furnace at 1100 ° C. or more for 1 second or more. The organic chlorine compound is decomposed and then discharged. Here, the reducing atmosphere refers to an atmosphere in which free oxygen that is not bonded to other elements substantially does not exist. HCl which is an environmental problem in exhaust gas
Is absorbed and absorbed in water and then discharged to the outside. Industrial waste containing organic chlorine compounds can be rendered harmless by such a method.

A second aspect of the present invention relates to a method of manufacturing the above-described melting furnace.
Heating of 0 ° C or more is supplied to the inside of the furnace from electrical energy and from outside the furnace.
With the fuel to be supplied or the fuel to be supplied into the furnace from outside the furnace ,
A method for detoxifying industrial waste containing an organic chlorine compound, wherein combustion is performed so that free oxygen of exhaust gas after combustion becomes 1 vol% or less. Since a certain amount of heat is required to melt the metal part of industrial waste, electric energy and fuel supplied from outside the furnace into the furnace are required.
The fuel is supplied from the outside of the furnace into the furnace, and the fuel supplied from the outside of the furnace into the furnace is burned so that the free oxygen in the exhaust gas after combustion becomes 1 vol% or less, and the above-mentioned heat amount is supplied. . Since the inside of the furnace can be maintained in a reducing atmosphere by burning such that the free oxygen of the exhaust gas after combustion is 1 vol% or less, DXN is not generated in the exhaust gas.

According to a third aspect of the present invention, there is provided an industrial system containing an organic chlorine compound, wherein the fuel is at least one selected from coke, coke oven gas, kerosene, pulverized coal, heavy oil, and LNG gas. This is a method for detoxifying waste.
The above-mentioned fuels are usually easily available fuels, and it is easy to treat industrial waste containing organochlorine compounds.

According to a fourth aspect of the present invention, there is provided a method for detoxifying an industrial waste containing an organic chlorine compound, comprising adding an organic chlorine compound extracted from the industrial waste in the reducing melting furnace and / or the gas cracking furnace. Processing method. By using the organic chlorine compound extracted from the above-mentioned industrial waste, there is an advantage that both the extracted organic chlorine compound and the metal part can be treated.

According to a fifth aspect of the present invention, in the reducing melting furnace and / or the gas cracking furnace, water is added to decompose the organic chlorine compound and an intermediate product thereof into a compound having a lower molecular weight. This is a method for detoxifying industrial waste containing organic chlorine compounds. By adding water in the reducing melting furnace and / or the gas cracking furnace, there is an effect that undecomposed organic chlorine compounds and intermediate products thereof can be decomposed into lower molecular compounds.

According to a sixth aspect of the present invention, in the gas discharge side of the gas cracking furnace, water is rapidly cooled from 1100 ° C. or higher to 150 ° C. or lower to absorb and adsorb HCl in the exhaust gas to the water,
This is a method for detoxifying industrial waste containing an organic chlorine compound, which comprises removing dust in the water, neutralizing HCl in the water, and discharging the neutralized HCl. If the exhaust gas from the gas cracking furnace is rapidly cooled from 1100 ° C. to 150 ° C. or less with moisture, HCl in the exhaust gas can be absorbed and adsorbed by the moisture, and DXN in the exhaust gas can be largely suppressed.

A seventh invention is a method for detoxifying industrial waste containing an organic chlorine compound, wherein the water is water added by a venturi scrubber. Venturi scrubbers are also employed in the present invention as they are the most convenient means of quenching gas.

An eighth aspect of the present invention is a method for removing HCl from a gas exhaust port and / or exhaust gas of the gas cracking furnace.
Is a method for detoxifying industrial waste containing an organic chlorine compound, which comprises measuring the amount of an organic chlorine compound. The measurement of HCl at the gas outlet of the gas cracking furnace is for controlling the amount of industrial waste charged so that the HCl concentration in the exhaust gas does not exceed a predetermined concentration. Also, the reason for measuring HCl in gas after removing HCl from exhaust gas is that the higher the concentration of HCl, the higher the DXN concentration generated when this exhaust gas is burned, so the HCl concentration is measured and the value is kept constant. This is for controlling the density to be equal to or less than the concentration of

A ninth aspect of the present invention is a method for harmless industrial waste containing an organochlorine compound, characterized in that fluctuations in the HCl concentration are averaged before or during the removal of HCl from the exhaust gas from the gas cracking furnace. It is a chemical treatment method. Before or during the removal of HCl from the exhaust gas from the gas cracking furnace, for example, if a surge tank is installed, the HC
Even if the 1 concentration changes, there is an effect that the surge tank can average out.

According to a tenth aspect of the present invention, there is provided a cupola wherein the reducing melting furnace blows oxygen gas from the tuyere instead of air, wherein the industrial waste containing organochlorine compounds is harmless. It is a chemical treatment method. Cupola is a furnace for melting completed scrap iron and the like, and the inside of the furnace has a reducing atmosphere, so that it can be effectively used as a melting furnace for transformers and the like. However, normally cupola blows air from the tuyere to burn coke, but in the present invention, oxygen gas is blown in place of nitrogen-rich air to reduce the amount of exhaust gas, reduce the capacity of blowers, etc., and achieve economical operation. And

The eleventh invention is characterized in that the organic chlorine compound contained in the industrial waste is at least one or more of polychlorinated biphenyl, chlorobenzene, polyvinyl chloride, chloroform, methyl chloride and benzyl chloride. This is a method for detoxifying industrial waste containing an organic chlorine compound, which is characterized by containing an organic chlorine compound. The organic chlorine compounds contained in transformers, capacitors, etc. are mainly polychlorinated biphenyls, chlorobenzenes (including trichlorobenzene and monochlorobenzene), etc., but the present invention is intended to decompose polyvinyl chloride, chloroform, methyl chloride, benzyl chloride. Also applicable to

A twelfth invention is directed to charging industrial waste containing an organic chlorine compound into the melting furnace substantially as it is, in place of the industrial waste from which part or all of the organic chlorine compound has been extracted. This is a method for detoxifying industrial waste containing a characteristic organic chlorine compound. When loading industrial waste into the melting furnace, it is desirable to remove the organic chlorine compound in advance, but it is not necessary to remove the organic chlorine compound from small industrial waste. Can be processed.

A thirteenth invention is a method for detoxifying industrial waste containing an organic chlorine compound, wherein the industrial waste is a transformer or a capacitor, and the organic chlorine compound is an insulating oil. . As the industrial waste to be treated, a transformer or a capacitor containing an organic chlorine compound containing PCB or the like is important. The present invention is particularly suitable for detoxifying a transformer or a capacitor.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic principle of the present invention will be described. In a reduction melting furnace and a gas decomposition furnace for melting a metal portion of industrial waste containing an organic chlorine compound, melting or decomposition is performed in an atmosphere in which free oxygen gas does not exist in the furnace. This is because dioxins (DXN) are not generated in an atmosphere in which free oxygen gas does not exist in the furnace as described above.

In the above-mentioned reduction melting furnace and gas decomposition furnace,
In order to provide an atmosphere in which free oxygen gas does not exist in the furnace, the amount of oxygen supplied to the reduction melting furnace and the gas cracking furnace is set to an oxygen ratio defined by the following equation of 1 or less. Oxygen ratio = supplied oxygen amount / (C × 32/12 + H ′ × 16 /
2) Here, the amount of supplied oxygen: the amount of oxygen supplied from outside the furnace (k
g), C: amount of carbon (kg) in the organochlorine compound charged into the furnace, H ′: amount of hydrogen (kg) reacting with HCl from the amount of hydrogen (kg) in the organochlorine compound charged into the furnace ) Less

The exhaust gas from the gas cracking furnace is CO, H ₂ ,
HCl and lower hydrocarbons. If this is not quenched with water, HCl is contained in the gas. Therefore, when this gas is used later as fuel gas, DXN is contained in the exhaust gas.
May occur. Therefore, at least this HCl is removed from the exhaust gas.

If the gas from the gas decomposition furnace is quenched with water, DXN can be prevented from being generated during the cooling of the exhaust gas. However, in this case, for example, if a venturi scrubber is employed as the quenching means, most of the HCl in the gas is absorbed in the wastewater, and this wastewater must be neutralized and discharged to the outside.

An embodiment of the present invention will be described with reference to the process chart shown in FIG. 1 and the apparatus shown in FIGS. In order to treat the industrial waste containing the organic chlorine compound so that DXN is not generated, a process as shown in FIG. 1 is employed. In order to extract insulating oil containing PCB from a transformer, a capacitor, or the like, the transformer or the like is turned over or extracted with a pump or the like, and separated into a liquid portion and a solid portion. The insulating oil still adheres to the transformer or the like, or the insulating oil slightly remains in the gap between the coils and the like.

When charging industrial waste such as a transformer into the melting furnace, it is possible to remove the organic chlorine compound in advance, but it is not always necessary to remove the organic chlorine compound from a small transformer. It is not necessary and can be processed without any problem.

The above-mentioned transformer and the like are directly charged into a reducing melting furnace. The transformer is, for example, 38 wt% of insulating oil, the balance is a metal portion, and the core mainly composed of steel is 51 wt%.
The coil mainly composed of copper accounts for 11 wt%. The capacitor is case 1 consisting mainly of 44% by weight of insulating oil and steel.
5 wt%, copper 14 wt%, and other 27 wt%.

The above metal part is charged into a reduction melting furnace, heated and melted, and discharged out of the furnace. Since the melted metal portion is mainly composed of steel and contains copper, it can be rapidly cooled to a granular metal and used as a raw material of soft ferrite or copper. At this time, slag is also generated, but rapidly cooled and used as a raw material for cement as granular slag. The insulating oil that has adhered during the dissolution of the metal part is decomposed.

Heating at 1100 ° C. or more in the melting furnace is performed by supplying electric energy and / or fuel supplied from outside the furnace to the furnace, and free oxygen in the exhaust gas after combustion is 1 vol%.
The combustion is performed as follows. Specifically, the arc current from the electrode and / or the fuel supplied from the outside of the furnace into the furnace is supplied with oxygen gas so that the free oxygen of the exhaust gas after combustion becomes 1 vol% or less, and the fuel is burned. Supply heat. The inside of the furnace is maintained in a reducing atmosphere by burning such that the free oxygen of the exhaust gas after combustion is 1 vol% or less.

As the above-mentioned fuel, coke, coke oven gas, kerosene, pulverized coal, heavy oil, LNG which is usually easily available
One or more selected from gases are used. The reducing exhaust gas discharged from the reduction melting furnace is retained in a gas decomposition furnace at 1100 ° C. for an average residence time of 1 second, and in particular, the PCB in the insulating oil is completely decomposed. 1100 ° C PCB
Decomposition completely after an average dwell time of 1 second was reported by the US Environmental Agency (DSDuvall, WARubey et al.
977)).

In the above reducing atmosphere, one of PCBs
Decomposition of biphenyl trichloride as an embodiment is carried out, for example, by the following formula. _{C 12 H 7 Cl 3 + 22H} 2 = 12CH 4 +
3HCl Incidentally, the form of degradation irrespective only formula, are generally degraded HCl, C _n H _m, in CO, and the like.

When the exhaust gas from the gas cracking furnace is not rapidly cooled, at least HCl in the gas is removed by, for example, a dehydrochlorinator equipped with NaOH. When the exhaust gas from the gas cracking furnace is quenched by, for example, a venturi scrubber, most of the HCl is absorbed by the cooling water, so that it is necessary to discharge the exhaust gas through at least the neutralization tank.

The above is the outline of the process of the present invention. Specific embodiments of the apparatus are shown in FIGS. In reduction melting furnace 2,
The industrial waste 8 from which the insulating oil is removed, coke 4 and oxygen 6 are charged as fuel, the fuel is burned and heated, and the metal part of the industrial waste 8 is dissolved and discharged. The organochlorine compound attached to the industrial waste 8 is decomposed or discharged undecomposed into the gas cracking furnace 14, where the temperature is 1100 ° C. or more and the average is 1
The organic chlorine compound such as PCB decomposes to a low-molecular compound when it is kept for more than sec.

As the reduction melting furnace 2, for example, a cupola using oxygen instead of air is preferable because the atmosphere in the furnace is reducing. Insulating oil containing PCB extracted from industrial waste in the reduction melting furnace 2 and the gas decomposition furnace 14 can be added by a burner. Also, when water is added at the same time, the decomposition gas can be changed to a lower molecular compound.

Even when the exhaust gas is not quenched, the exhaust gas is cooled in the pipe and generates water. Therefore, it is desirable to pass the exhaust gas through the mist separator 18 in order to remove the water. Next, if necessary, the gas heater 20 is passed through,
It passes through a HCl removal device 22 to remove HCl in the exhaust gas. Even after burning this exhaust gas as fuel, DXN
This is to prevent the occurrence of. Furthermore, the exhaust gas is activated carbon 2
4 to adsorb undesired components. At this time, after passing through a bag filter 26 to remove carbon suspended in the exhaust gas, the gas is discharged as a fuel gas 30 by a blower 28 and stored in a tank.

FIG. 3 shows an example of an apparatus in which exhaust gas from a gas cracking furnace is rapidly cooled by, for example, a venturi scrubber.
Unlike the case of FIG. 2, a venturi scrubber 15 is arranged at the outlet of the gas cracking furnace 14 to rapidly cool the exhaust gas to 150 ° C. or lower and to absorb HCl in the exhaust gas into the cooling water. The cooling water may be dust-removed by, for example, a drain filter 32 and undesired components may be removed by activated carbon 34, then neutralized by a neutralization tank 36, and the dust may be precipitated by a thickener 38 and then discharged to the outside. desirable. Other points are the same as those in FIG.

FIG. 4A shows another example of the apparatus. The difference from FIG. 3 is that it is desirable to provide an HCl analyzer at the outlet of the gas cracking furnace 14 and / or at the subsequent stage of the HCl removing device, to measure the HCl concentration in the exhaust gas, and to control the operating conditions. Also,
As shown in FIG. 4 (B), by providing a two-stage dehydrochlorination apparatus and arranging a surge tank 23 in the middle, even if the HCl concentration changes, the change can be averaged.

[0047]

EXAMPLE In order to demonstrate the decomposition reaction of PCB, a dangerous P
Monochlorobenzene was subjected to a decomposition reaction in place of CB. Since the chemical properties of monochlorobenzene are close to those of PCB, the United States Environmental Agency also allows experiments using monochlorobenzene instead of PCB. The component composition of monochlorobenzene is C: 64.0 wt%, H: 4.4.
wt%, Cl: 31.6 wt%. An experiment for decomposing monochlorobenzene was performed using the experimental apparatus shown in FIG.

In a high-frequency melting furnace 40, 0.65 kg of pig iron, 0.3 kg of copper and 0.05 kg of monochlorobenzene are charged, and the temperature is raised to 500 ° C. for 30 minutes, 800 ° C. for the next 30 minutes, and 1600 ° C. for the last 30 minutes. Heated. This is because monochlorobenzene easily evaporates at 500 to 800 ° C., so that the space is slowly heated. In order to make the inside of the furnace reducible, CO and H2 were introduced at ₂₀ and 100 cc / min, respectively, and water was added at 0.02 g / min for the melting furnace and the heating furnace.

The gas generated in the furnace was passed through a heating furnace heated to 1200 ° C. and stored in a gas holder. As a result of analyzing the exhaust gas from this heating furnace, the results shown in Table 1 were obtained. As shown in Table 1, the amount of generated DXN was 0.01 ng TEQ / Nm ³ or less. This experiment demonstrated that decomposition of monochlorobenzene, and thus PCB, in a reducing atmosphere produced substantially no DXN.

Next, using the apparatus shown in FIG. 6, the exhaust gas (reducing gas) 51 of the gas holder
The degassed HCl gas 53 is passed through a dehydrochlorinator 52 made of an aqueous solution of wt% NaOH,
The gas is burned in a ceramic combustion tube 55 heated to 0 ° C., and the obtained exhaust gas is first discharged into a dioxin collector 5.
7 and is suctioned by a suction pump 58 to produce a gas meter 59.
Discharged through. When the DXN absorbed by the dioxin collector 57 was analyzed in relation to the amount of HCl before combustion, Table 2 was obtained.

[0051]

[Table 1]

[0052]

[Table 2]

As a result, if the HCl concentration of the exhaust gas (reduced combustion gas) 51 before combustion is 6 ppm or less, the DXN concentration in the exhaust gas is 0.5 ng TEQ, which is the current environmental standard.
/ Nm ³ or less. That is, if HCl is sufficiently removed from the gas obtained by reducing and burning the insulating oil containing PCB or the like according to the present invention, even if this gas is used as fuel, D
It became clear that XN did not occur.

As described above, an industrial waste containing an organic chlorine compound including a PCB or the like is dissolved in a reducing atmosphere.
When the organic chlorine compound is decomposed, the resulting exhaust gas is DX
It was found that N was not formed. Therefore, industrial waste containing organochlorine compounds such as PCB used for transformers and capacitors can be thermally decomposed without generating DXN harmful to the human body, which is an extremely useful invention for public health, health and industry. It is.

[Brief description of the drawings]

FIG. 1 is a view showing a process of the present invention.

FIG. 2 is a diagram showing an example of an apparatus for implementing the present invention.

FIG. 3 is a diagram showing another example of an apparatus for implementing the present invention.

FIG. 4 is a diagram showing another example of an apparatus for implementing the present invention.

FIG. 5 is a diagram showing an apparatus in which monochlorobenzene is decomposed in order to prove the principle of the present invention.

FIG. 6 is a diagram showing an experimental device for performing an experiment on whether or not DXN is generated when oxidizing and burning exhaust gas obtained by decomposing an organic chlorine compound according to the present invention.

[Explanation of symbols]

 2 Reducing Melting Furnace 4 Coke 6 Oxygen 8 Industrial Waste 10 Water 12 Combustion Burner 14 Gas Decomposition Furnace 16 Exhaust Gas Treatment System 18 Mist Separator 20 Gas Heater 22 Dehydrochlorinator 23 HCl Analyzer 24 Activated Carbon 26 Bag Filter 28 Blower 30 Fuel Gas 32 Drain filter 34 Activated carbon 36 Neutralization tank 38 Thickener

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B09B 3/00 302-304

Claims (13)

(57) [Claims] 1. A method for detoxifying industrial waste containing an organic chlorine compound, comprising the following steps: (A) charging industrial waste from which some or all of the organochlorine compound has been extracted into a reducing melting furnace, and (b) electric energy and outside the furnace while maintaining the atmosphere in the reducing melting furnace at a reducing property. Fuel to be supplied into the furnace from
Or heating at 1100 ° C. or higher with a fuel supplied from outside the furnace to the furnace , (c) dissolving the metal component contained in the industrial waste and discharging from the melting furnace, (d) the melting furnace The gas generated in the gas is kept in a gas decomposition furnace at 1100 ° C. or more for 1 second or more to decompose the organic chlorine compound in the gas and then discharged. (E) At least from the gas discharged from the gas decomposition furnace After the HCl in this gas is adsorbed and absorbed, it is discharged to the outside. 2. Heating at a temperature of 1100 ° C. or higher in the reducing melting furnace is supplied to the electric energy and the inside of the furnace from outside the furnace.
Fuel, or carried from the furnace outside the fuel supplied into the furnace, containing chlorinated organic compound according to claim 1, wherein the free oxygen of the exhaust gas after combustion and performing by burning to be equal to or less than 1 vol% Detoxification of industrial waste. 3. The fuel according to claim 2, wherein the fuel is coke, coke oven gas,
The method for detoxifying industrial waste containing an organic chlorine compound according to claim 2, wherein the waste is at least one selected from kerosene, pulverized coal, heavy oil, and LNG gas. 4. The method according to claim 1, wherein an organic chlorine compound extracted from industrial waste is added in the reducing melting furnace and / or the gas cracking furnace.
A method for detoxifying industrial waste containing an organic chlorine compound as described in the above item. 5. The method according to claim 1, wherein water is added to the reducing melting furnace and / or the gas cracking furnace in order to decompose the organochlorine compound and an intermediate product thereof into a compound having a lower molecular weight. 5. A method for detoxifying industrial waste containing an organochlorine compound according to any one of items 1 to 4. 6. A gas discharge side of the gas cracking furnace,
It is quenched with water from 1100 ° C or higher to 150 ° C or lower, absorbs and adsorbs HCl in exhaust gas to the water, removes dust in the water, neutralizes HCl in the water, and discharges. A method for detoxifying industrial waste containing an organic chlorine compound according to any one of claims 1 to 5. 7. The method for detoxifying industrial waste containing an organic chlorine compound according to claim 6, wherein the water is water added by a venturi scrubber. 8. The organic chlorine compound according to claim 1, wherein HCl in the exhaust gas is measured after removing HCl from a gas outlet and / or exhaust gas of the gas cracking furnace. Detoxification method of industrial waste containing. 9. HCl from the exhaust gas from the gas cracking furnace
The method for detoxifying industrial waste containing an organic chlorine compound according to any one of claims 1 to 8, wherein the fluctuation of the HCl concentration is averaged before or during the removal of the organic chloride. 10. The organic chlorine according to claim 1, wherein the reducing melting furnace is a cupola characterized by blowing oxygen gas from the tuyere instead of air. A method for detoxifying industrial waste containing compounds. 11. An organic chlorine compound containing at least one or more of polychlorinated biphenyl, chlorobenzene, polyvinyl chloride, chloroform, methyl chloride, and benzyl chloride in the industrial waste. 11. The method according to claim 1, wherein
A method for detoxifying industrial waste containing an organic chlorine compound according to any one of the above. 12. An industrial waste containing an organochlorine compound is charged into the melting furnace substantially as it is in place of the industrial waste from which part or all of the organochlorine compound has been extracted. Item 12. A method for detoxifying industrial waste containing an organic chlorine compound according to any one of items 1 to 11. 13. The industry containing an organic chlorine compound according to claim 1, wherein the industrial waste is a transformer or a capacitor, and the organic chlorine compound is an insulating oil. Detoxification method of waste.