JPH0910751A - Waste treatment apparatus and method - Google Patents

Abstract

PURPOSE: To treat waste without discarding the same to environment, in an apparatus for treating waste composed of a foamed resin containing specific fluorocarbon as a foaming agent, by forming a structure not leaking gas containing halogenated hydrocarbon gas or a halogen compd. formed by the decomposition of halogenated hydrocarbon to the outside of the treatment apparatus. CONSTITUTION: The waste household electric product 02 charged from a waste household electric product charging port 01 is sent to the machinery crushing part 12 in a machinery disposal chamber 11 to be crushed. The crushed waste household electric product 03 is moved to a hot dry distillation chamber through a movable door 13 and the metal parts thereof are separated by evaporating halogenated hydrocarbon from a foamed resin by hot dry distillation treatment and the evaporated halogenated hydrocarbon is discharged to a halogenated hydrocarbon decomposition chamber through a connection part 25. Halogenated hydrocarbon comes into contact with an activated catalyst to cause decomposition reaction and hydrocarbon is separated to form halide which is, in turn, fed to an adsorbing chamber 41 through a connection pipe 42 to be adsorbed by an adsorbent 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for treating general waste and industrial waste, and more particularly to a method for treating waste having a halogenated hydrocarbon-containing foamed resin as at least a part of its constituents. Regarding a processing device.

[0002]

2. Description of the Related Art Conventionally, when a waste electrical home appliance is disposed of, it is treated as general waste when discarded by a general consumer, and as industrial waste when disposed of by a business or the like. As described above, even when treating the same abandoned home electric appliance, the treatment differs depending on the disposal source, but the concrete treatment method is mainly landfill treatment in both cases.
Among the above-mentioned waste home electric appliances, urethane foam resin is used as a heat insulating material in, for example, a waste refrigerator, and as a foaming agent for this urethane foam resin, chlorofluorocarbon such as CFC11 and CFC12 has been mainly used. When landfill treatment of waste home appliances made of urethane foam resin containing such freon as a foaming agent is carried out, CFC11 and CFC
There is a risk of releasing CFCs such as 12.

Since the discovery of the ozone hole, the depletion of the ozone layer by specific CFCs has become a problem because of global environmental awareness. Specified CFCs such as CFC11 and CFC12 diffuse into the stratosphere without being decomposed because they are relatively stable substances when released into the atmosphere. As a result, CFC11, CFC12, etc. in the stratosphere are decomposed by strong ultraviolet rays from the universe, causing the destruction of the ozone layer. When the ozone layer is destroyed, a large amount of harmful ultraviolet rays reach the ground, destroying biological systems and harming the human body.
It has been found to have various adverse effects. For this reason, when disposing of waste home appliances that may release specified CFCs into the atmosphere, it is necessary to decompose and detoxify the specified CFCs in advance instead of simply landfilling them. It has been demanded.

On the other hand, it has been considered to use alternative freons such as HCFC22 and HFC134a in place of specific freons such as CFC11 and CFC12 as a foaming agent. However, these alternative freons also have non-zero ozone depletion potential. It is not necessarily harmless, and it is required to gradually reduce usage.
Therefore, it is also required to dispose of the alternative CFCs and detoxify the wastes containing the urethane foam resin containing the alternative CFCs as a foaming agent.

The urethane foam resin containing the specified CFC or alternative CFC as a foaming agent is classified into a soft foam and a hard foam depending on the raw materials and the degree of cross-linking. The soft foam is an automobile part or a packaging container. Further, the hard foam is widely used as a heat insulating material, a sound absorbing material and the like. As described above, urethane foam resin containing freon as a foaming agent is used not only in waste refrigerators but also in various fields. There is a demand for a treatment method that can be treated after being rendered harmless. In particular, in the refrigerator, in addition to the specific freon for foaming, the particular freon is also used for the refrigerant, so it is important to recover and detoxify these at the same time, but such a point is unsolved. There is.

[0006]

[Problems to be Solved by the Invention] As described above, CFC
Since specific CFCs such as 11 and CFC12 cause environmental problems, there is a strong demand for a method of disposing of specific CFCs in advance and detoxifying the waste that has urethane foam resin containing it as a foaming agent. It is rare. The same applies to the case where the alternative CFC is used as the foaming agent. As described above, there is a strong demand for an effective and efficient method and apparatus for treating wastes containing urethane foam resin containing harmful CFC as a foaming agent.

CFCs (halogenated hydrocarbons) are considered to have infinite intermediate products in the process of decomposition, which makes it difficult to decompose and detoxify CFCs (halogenated hydrocarbons). For example, if the product is stable without being completely decomposed, it may be discharged into the atmosphere without being adsorbed even if an adsorption process such as an adsorbent or catalyst is attempted, and the decomposition / detoxification process is not completely performed. May not be. One of the causes of not being completely decomposed is the presence of excessive oxygen in the reaction process, the formation of intermediate products due to the reaction with moisture existing in the external environment, and the reverse reaction of the reaction.
In addition, it is also possible that an intermediate product is generated in the device due to moisture and oxygen mixed in from the outside even during the device maintenance and the device becomes stable. Due to such a cause, there is a problem that it becomes difficult to dispose of a waste having a foamed resin containing a specific CFC or an alternative CFC as a constituent material.

The present invention has been made in order to cope with such a problem, and is used as a foaming agent or the like when treating wastes having a foamed resin containing a specific CFC or an alternative CFC as a foaming agent or the like as a constituent material. It is an object of the present invention to provide a waste treatment method and a waste treatment apparatus capable of decomposing and detoxifying such fluorocarbons without discharging the fluorocarbons to the outside.

[0009]

According to a first aspect of the present invention, there is provided a waste treatment device, wherein the waste treatment device has a crushing mechanism for crushing a waste having a halogenated hydrocarbon-containing foamed resin as at least a part of its constituent materials, and the crushing mechanism. A dry distillation mechanism for discharging at least the halogenated hydrocarbons from the waste crushed in step 1, a decomposition mechanism for decomposing the discharged halogenated hydrocarbons in a gas containing at least the halogenated hydrocarbons, and the decomposed product And a decomposition product immobilization mechanism for immobilizing the decomposition product with a catalyst or an adsorbent, wherein the crushing mechanism, the carbonization mechanism, the decomposition mechanism, and the decomposition product immobilization mechanism are at least the halogen. Do not let the hydrocarbon gas and the gas containing the halogen compound produced by the decomposition of the halogenated hydrocarbon leak out of the processing apparatus. Characterized in that it is a structure.

Examples of the waste subject to the present invention include wastes having a foamed resin containing a halogenated hydrocarbon as a foaming agent, such as a urethane foamed resin or a foamed styrene resin, as at least a part of the constituent materials. To be done. The waste may be made of the foamed resin itself or a part of the constituent material may be made of the foamed resin. Specific wastes to be treated include, but are not limited to, waste home electric appliances, waste automobile parts, waste heat insulating materials, waste sound absorbing materials, and the like. Further, as the above-mentioned halogenated hydrocarbon, an aliphatic organic halide is particularly mentioned. Specifically, it is not limited to so-called specific freon (chlorofluorocarbon), and may be an alternative freon (hydrofluorocarbon, hydrochlorofluorocarbon, etc.).

The crushing mechanism in the present invention is not particularly limited as long as it is an apparatus capable of processing waste home electric appliances and the like into a size suitable for processing. Specifically, a cutter, a shredder, or the like can be used. These devices are housed in one space, and the crushing mechanism after the waste is charged has a structure that can be sealed. As a result, in the process of crushing, specific CFCs and the like are not released to the outside.

The specific size of the waste to be crushed varies depending on the type of the waste and the amount that can be treated by the carbonization mechanism, but it is preferable that the size is, for example, about 10 to 500 mm square. If the size of the waste is less than 10 mm, the amount of halogenated hydrocarbons that evaporate before the heat treatment increases, while
If it exceeds 500 mm, the instantaneous gas generation amount increases. A more preferable size is about 100 to 200 mm square.

The carbonization mechanism in the present invention is provided with a thermal carbonization chamber, a heating part, a control part for controlling the temperature of the thermal carbonization chamber, etc. as main parts, and heat-processes the crushed waste to produce a waste product. It is a mechanism for discharging halogenated hydrocarbons from. The heat treatment is performed using a normal dry distillation furnace such as a furnace using a gas burner or an electric furnace, and when the main part of the waste contains a large amount of magnetic material such as iron, this is heated in a dielectric heating furnace. May be

The decomposition mechanism in the present invention is mainly equipped with a halogenated hydrocarbon decomposition chamber and a control section for controlling the temperature of this decomposition chamber, and decomposes into a gas containing halogenated hydrocarbon discharged from the carbonization mechanism. And
This is a mechanism for decomposing halogenated hydrocarbons into, for example, halides and hydrocarbons. This halogenated hydrocarbon decomposition chamber is equipped with a catalytic thermal decomposition device, a plasma thermal decomposition device,
A combustion decomposition device or the like can be used.

The catalyst in the thermal decomposition apparatus using the catalyst is CuO, Co ₃ O ₄ , Mn ₂ O ₃ , MgO, CaO, SiO ₂ /
Examples include Al ₂ O ₃ and TiO ₂ / SiO ₂ . In addition to thermal decomposition treatment using a catalyst, plasma decomposition treatment or combustion decomposition treatment can be applied as described above, and which method is to be applied is appropriately determined depending on the treatment amount and halogenated hydrocarbon concentration. do it. Further, steam plasma may be used for the plasma decomposition treatment, whereby the decomposition efficiency of the halogenated hydrocarbon can be further enhanced.

The decomposition product immobilization mechanism in the present invention is a mechanism that has an adsorption chamber filled with an adsorbent as a main part and immobilizes the above-mentioned halide with the adsorbent. An alkaline earth metal such as calcium can be used as the adsorbent. As a method of adsorption, it is preferable to apply a method of trapping as CaCl ₂ or CaF ₂ by applying solid adsorption treatment such as a filter.

The processing apparatus according to claim 1 has a structure in which a halogenated hydrocarbon gas generated in the apparatus and a gas containing a halogen compound generated by decomposition of the halogenated hydrocarbon are not leaked out of the processing apparatus. For example, after the waste is charged into the crushing mechanism, the charging port is closed, and the device has a closed structure except for the decomposition product fixing mechanism. By making the processing equipment including the crushing mechanism a closed structure, the halogenated hydrocarbon gas and the gas containing the halogen compound produced by the decomposition of the halogenated hydrocarbon are discharged through the decomposition mechanism and the decomposition product fixing mechanism. .

The waste processing apparatus of claim 2 is the same as that of claim 1.
In the waste treatment device, the crushing mechanism, the carbonization mechanism, the decomposition mechanism and the decomposition product immobilization mechanism are separated from each other so that the gas generated in each mechanism does not return to the previous mechanism. It is characterized by having means.

As a means for preventing the gas generated in each mechanism from returning to the preceding mechanism, there are a check valve and a movable door provided at the boundary between both mechanisms. For example, there is a movable door provided at the boundary between the waste crushing chamber and the thermal carbonization chamber. By this means, it is possible to prevent the halogenated hydrocarbon gas mainly generated in the hot carbonization chamber from flowing back to the waste crushing chamber. A waste treatment apparatus according to a third aspect is the waste treatment apparatus according to the first aspect, characterized in that the decomposition mechanism and the decomposition product fixing mechanism are provided in the same apparatus.

As a specific example of the present treatment apparatus, there can be mentioned an apparatus for holding a catalyst for decomposing a halogenated hydrocarbon gas and an adsorbent for adsorbing a halide in a mixed state. The waste treatment apparatus according to claim 4 is the waste treatment apparatus according to claim 1, wherein the crushing mechanism, the carbonization mechanism, the decomposition mechanism, and the decomposition product immobilization mechanism cover the entire mechanism. It is arranged in.

The present processing apparatus completely covers the crushing mechanism, the carbonization mechanism, the decomposition mechanism and the decomposition product fixing mechanism, and shuts off the processing device from the outside. Communication with the outside world is limited to the waste input port provided in the crushing mechanism and the exhaust port provided in the decomposition product fixing mechanism. With such a structure, the sealing becomes more complete.

The waste treatment device of claim 5 is the same as that of claim 1.
In the waste treatment device, the crushing mechanism, the carbonization mechanism, the decomposition mechanism and the decomposition product immobilization mechanism are arranged in the same processing space.

The waste treatment device of claim 6 is the same as that of claim 5.
In the waste treatment apparatus, there is provided a means for raising the temperature of the treatment space.

The waste treatment device of claim 7 is the same as that of claim 6.
In the waste treatment apparatus, the means for raising the temperature of the treatment space uses the hydrocarbon discharged from the decomposition mechanism as a heat source.

In the processing apparatus according to the fifth to seventh aspects, the crushing mechanism, the carbonization mechanism, the decomposition mechanism and the decomposition product fixing mechanism are arranged in the same processing space. In this case, it is particularly desirable that the decomposition mechanism and the decomposition product immobilization mechanism be arranged in the same device. The overall processing equipment is compact and the thermal management of the equipment is advantageous.

The waste processing apparatus of claim 8 is the same as that of claim 1.
In the waste treatment device described above, an exhaust mechanism for exhausting at least one of the mechanism spaces is further provided.

The waste treatment apparatus of claim 9 is the same as that of claim 8.
In the waste treatment device, the exhaust mechanism is means for exhausting at least the crushing mechanism space.

The waste treatment apparatus according to a tenth aspect of the present invention is the waste treatment apparatus according to the first aspect, characterized in that it has means for making a negative pressure in each of the mechanism spaces.

An eleventh aspect of the waste treatment apparatus according to the ninth aspect is characterized in that it has means for filling the exhausted mechanical space with nitrogen after the evacuation.

The processing apparatus according to any one of claims 8 to 11 is
For example, an exhaust device such as an exhaust fan is provided. This exhaust fan can easily replace the atmosphere in the apparatus with, for example, nitrogen gas when starting the treatment of waste.
Further, the inside of the apparatus can be made to have a negative pressure by using the exhaust means.

A waste treatment apparatus according to a twelfth aspect of the present invention is the waste treatment apparatus according to the first aspect, characterized in that it has processing amount control means in the dry distillation mechanism.

The waste treatment apparatus according to a thirteenth aspect is the waste treatment apparatus according to the first aspect, characterized in that it has a processing amount control means in the decomposition mechanism.

A waste treatment apparatus according to a fourteenth aspect is the waste treatment apparatus according to the first aspect, wherein the exhaust gas discharged from the carbonization mechanism when the decomposition mechanism is replaced is stopped and a gas containing no water is removed. An exhaust gas branch valve that can be switched to a path for supplying exhaust gas discharged from the dry distillation mechanism to the decomposition mechanism after supplying a gas containing no moisture for a predetermined time even after the decomposition mechanism is replaced with the decomposition mechanism. It is characterized by being installed in front.

The twelfth to fourteenth treatment apparatuses have a waste treatment amount control means. A flow meter etc. can be mentioned as a specific example of the throughput control means.
Further, the maintenance of the processing device is facilitated by providing the exhaust gas branch valve.

According to a fifteenth aspect of the present invention, in the waste treatment method, a first step of crushing a waste having a halogenated hydrocarbon-containing foamed resin as at least a part of a constituent material and the waste crushed in the crushing step. A second step of discharging at least the halogenated hydrocarbon by dry distillation of the substance, and a third step of decomposing the discharged halogenated hydrocarbon in the gas containing at least the halogenated hydrocarbon, A waste treatment method comprising a fourth step of immobilizing the decomposed product with a catalyst or an adsorbent, which comprises at least the halogenated hydrocarbon gas and a halogen compound produced by decomposition of the halogenated hydrocarbon. It is characterized in that the processing gas is processed without leaking to the outside of the processing apparatus.

A waste treatment method according to a sixteenth aspect is the waste treatment method according to the fifteenth aspect, wherein the first to fourth steps are performed.
The process is performed in ascending order up to the process of 1, and the subsequent process is not performed until the previous process is completed.

A waste treatment method according to a seventeenth aspect is characterized in that, in the waste treatment method according to the fifteenth aspect, the third step and the fourth step are simultaneously performed.

A waste treatment method according to an eighteenth aspect is the waste treatment method according to the fifteenth aspect, wherein each step is performed in a deoxygenated atmosphere.

A waste treatment method according to a nineteenth aspect is the waste treatment method according to the fifteenth aspect, wherein the inside of the treatment apparatus is exhausted before the first step.

The first step of crushing the waste is the method of claim 1.
It can be performed using the cutter or shredder used in the invention. Crushing is performed in a closed container.

An example of the dry distillation method will be described using a urethane foam resin as an example. Urethane resin melts at around 323K and halogenated hydrocarbons (CFCs) are discharged.
This heat treatment temperature is, for example, about 323 to 573K (preferably,
By holding the temperature at 373 to 473 K), most of the halogenated hydrocarbon as a blowing agent can be discharged.
When the temperature is maintained at about 453 to 873K (preferably 493 to 723K) after discharging the halogenated hydrocarbon, the urethane resin decomposes and mixes with CO and NO _x to produce isocyanate, phenol, C1 to C8 hydrocarbon gas, etc. It will be discharged. This can be used as an auxiliary fuel for the cracking by leading it to the subsequent halogenated hydrocarbon cracking step. It may also be used as an auxiliary fuel for the heat treatment in the dry distillation process. Urethane resin decomposes almost completely at 773 to 873K. Even if the temperature at which the urethane resin is decomposed exceeds 873K, not only the further effect cannot be obtained, but also harmful gas may be generated.

It is a preferable processing method that the treatments are performed in the ascending order from the first step to the fourth step, and the subsequent treatments are not performed until the previous treatment is completed. By adopting such a method, it is possible to perform waste treatment in a sealed state in which each step does not come into contact with the outside world at all. Further, it is particularly preferable that the dry distillation step is performed in a deoxygenated atmosphere, for example, in a nitrogen atmosphere.

In the third step of decomposing the halogenated hydrocarbon into a halide and a hydrocarbon, a thermal decomposition method using a catalyst, a plasma thermal decomposition method, a combustion decomposition method or the like can be used.

The fourth step of fixing the decomposition product is a step of fixing the halide with an adsorbent, and an alkaline earth metal such as calcium is used as the adsorbent. The method of adsorption is to apply CaCl ₂ or
It is preferable to apply a method of trapping as CaF ₂ .

[0045]

【Example】

Example 1 The waste treatment device according to claim 1 will be described with reference to FIG. FIG. 1 is a schematic diagram of a waste treatment device in which each mechanism is divided into individual devices. Further, FIG. 2 is a flow chart showing the processing steps, and relates to the processing method of claim 15 or claim 16. This waste treatment device has a waste home appliance input port 01, a device crushing chamber 11 that is a crushing mechanism, a thermal carbonization chamber 21 that is a carbonization mechanism, a halogenated hydrocarbon decomposition chamber 31 that is a decomposition mechanism, and a decomposition product fixing mechanism. It is composed of an adsorption chamber 41 and an exhaust unit 51, and a device crushing unit 12 is installed inside the device crushing chamber 11. Also, a movable door A1 for partitioning the equipment crushing chamber 11 and the thermal distillation chamber 21
3, a thermal dry distillation chamber heater unit 22 for raising the temperature of the thermal dry distillation chamber, a temperature sensor unit A23 for constantly detecting the temperature of the thermal dry distillation chamber, and a temperature adjusting unit A24 for adjusting the temperature of the thermal dry distillation chamber. , A connection part 25 for connecting the thermal carbonization chamber 21 and the halogenated hydrocarbon decomposition chamber 31, a catalyst holder 32 for decomposing the halogenated hydrocarbon, a halogenated hydrocarbon decomposition chamber heater part 33, a halogenated hydrocarbon decomposition A temperature sensor unit B34 for detecting the temperature inside the room, a temperature control unit 35 for controlling the temperature inside the halogenated hydrocarbon decomposition chamber, and a connection unit B connected to the adsorption chamber 41.
42, and a pump 43 for pushing the exhaust gas into the adsorption chamber. The adsorption chamber 41 is filled with an adsorbent 61, and an exhaust port 44 for exhausting the adsorption chamber 41 to the outside is installed.

Specific processing steps will be described with reference to FIG. The waste home electric appliance 02 is thrown in from the waste home electric appliance throw-in port 01, and the waste home electric appliance throw-in port 01 is sealed. Then, it is sent to the equipment crushing section 12 installed in the equipment crushing chamber 11 to crush the waste home electric appliances. The crushed waste home appliances 03 move to the thermal carbonization chamber 21 via the movable door A13. After the crushed waste home appliances have finished moving to the thermal distillation chamber 21, the movable door A1
Seal 3 In advance, the thermal distillation chamber 21 has a temperature sensor unit A
While the temperature is detected by 23, it is heated by the heater section 22 and controlled by the temperature control section 24 at 300 to 500 ° C. Waste home appliances 03 crushed in the thermal distillation chamber 21
From the halogenated hydrocarbon-containing foamed resin, the halogenated hydrocarbon is vaporized and separated from the metal part by a hot dry distillation treatment. The vaporized halogenated hydrocarbon is exhausted to the halogenated hydrocarbon decomposition chamber 31 via the connecting portion 25. The exhausted halogenated hydrocarbon is introduced into the catalyst container 32. In order to raise the temperature of the catalyst 60 previously filled in the catalyst container 32 to the temperature that promotes the activity of the catalyst 60 by the halogenated hydrocarbon decomposition chamber heater section 33, the temperature control section 35 controls the temperature while detecting it by the temperature sensor section B34. Has been done. The halogenated hydrocarbon causes a decomposition reaction by coming into contact with the activated catalyst 60, and as a result, the hydrocarbon is separated into a halide. Hydrocarbons are recovered. Further, the halide is adsorbed in the adsorption chamber 4 via the connecting pipe 42.
1 is transported by the pump 43. The adsorption chamber 41 is filled with an adsorbent 61 and adsorbs the transported halide. Exhaust port 4 with the halide removed
It is exhausted to the outside air via 4.

In this series of steps, the first treatment is a step of crushing the casing of the equipment having the halogenated hydrocarbon-containing foamed resin, and the second treatment is a step of crushing the crushed casing with a metal. In order to separate it from other substances containing halogenated hydrocarbons, hot dry distillation is performed, and gas other than metals is gasified.
The treatment is a step of converting the halogenated hydrocarbon into a halide and a hydrocarbon with a catalyst, and the fourth treatment is a step of fixing the halide with a catalyst or an adsorbent to render it harmless.

A method of treating wastes using the apparatus of claims 1 and 2 will be described with reference to the process chart of FIG.
The first processing step (crushing step) to the fourth step (decomposition product fixing step) are partitioned in different rooms, and the second step (dry distillation step) is started until the first processing step is completely completed. It is not done, and the process shall be performed in a sealed state so as not to come into contact with the outside world at all. Similarly, the third treatment step (decomposition step) is not started until the second treatment step is completely completed, and the third treatment step is kept sealed so as not to come into contact with the outside during the treatment step. Furthermore, similarly, the fourth processing step is not started until the third processing step is completely completed, and the fourth processing step is kept in a sealed state so as not to come into contact with the outside world at all during the processing step. The inside of the device will be a temperature and corrosion resistant wall with Teflon coating.

Embodiment 2 Claim 1 in which waste is processed by using the processing apparatus of claim 3.
The method 7 will be described with reference to the process chart of FIG. The first processing step to the fourth processing step are separated in separate rooms, and the second processing step is not started until the first processing step is completely completed. During that step, there should be no contact with the outside world. It should be performed in a sealed state. In addition, it is assumed that the third processing step proceeds simultaneously with the fourth processing step,
Do not start until the treatment process of
During the treatment process, it is kept in a sealed state so as not to come into contact with the outside world at all.

FIG. 4 shows an apparatus for simultaneously advancing the third step and the fourth step. The decomposition chamber for halogenated hydrocarbon and the adsorption chamber for halide are integrated, and the decomposition / adsorption chamber 45 includes a heater unit 46 and a temperature sensor unit 4.
7 and the temperature controller 48, and the catalyst 60 and the adsorbent 61 are mixed inside. The halogenated hydrocarbon exhausted from the hot dry distillation chamber is introduced into the decomposition / adsorption chamber 45 which has been heated to the activation temperature of the catalyst in advance, and the decomposition reaction occurs. At the same time as the reaction, adsorption is performed.

In order to prevent the gas generated in each step from returning to the previous step, a check valve 62 may be installed in the pipe connecting each step. An example of the check valve 62 is shown in FIG.

Embodiment 3 A waste treatment apparatus according to claim 4 will be described with reference to FIG. A container 70 serving as a device for sealing is provided outside the basic configuration of claim 1. This container has a volume enough to completely cover the entire waste treatment device, and the communication ports with the outside world are only the waste home appliance input port 01 and the exhaust port 44. Other parts are completely welded or compression-bonded by packing as shown in FIG. Before the first processing step, the communication port 01 is opened and the waste home electric appliance 02 is put in. After the charging is completed, the communication port 01 is completely sealed. After that, the first step, the second step, the third step, and the fourth step are performed in this order, or the first step and the fourth treatment fix the halide with a catalyst or an adsorbent. And make it harmless.

The effects of using the waste treatment device according to any one of claims 1 to 4 and the treatment method according to any one of claims 15 to 17 will be described. When decomposing CFCs (halogenated hydrocarbons), an infinite number of intermediate products are considered, and if they are stable without being completely decomposed, they will not be adsorbed in the atmosphere even if they are adsorbed by an adsorbent or catalyst. There is a possibility that it will be discharged into the air and the treatment may not be completed completely. One of the causes is that excessive oxygen is present in the reaction process (FIG. 7), the formation of intermediate products due to the reaction with moisture existing in the external environment, and the case where the reaction proceeds in reverse. In addition, it is also possible that an intermediate product is generated in the device due to moisture and oxygen mixed in from the outside even during the device maintenance and the device becomes stable. In order to solve the above-mentioned problems, oxygen is not newly added by carrying out in a hermetically sealed state so as not to come into contact with the external environment until the first processing step to the fourth processing step are completed. (Freon decomposition) is promoted, and intermediate products that are difficult to adsorb, such as aldehydes, are reduced. As a result, the intermediate product is less likely to be included in the exhaust gas, and the exhaust gas can be exhausted to the outside in a clean state. In addition, since the whole process is hermetically sealed, the intermediate product in the middle of the reaction is not discharged to the atmosphere, and the environment is not destroyed. Furthermore, when operating the device, the device can be moved without impairing the health of the person who operates it.

The influence of oxygen in the reaction process will be described with reference to FIG. In FIG. 7, the horizontal axis represents the air ratio (the ratio to the amount of air when hydrocarbons are completely decomposed into water and carbon dioxide by oxygen of the hydrogen halide-containing foamed resin), and the vertical axis represents the gasification rate (after reaction). The ratio of hydrocarbons in the exhaust gas is shown. Although the gasification rate in the reaction varies depending on the reaction temperature, it can be seen that the gasification rate is much better when the air ratio is 0, where oxygen is not present, than when oxygen is even present. For example, when the reaction is carried out at 500 ° C, when the air ratio is 0.5, the gasification rate is about half that of when the air ratio is 0, and the reaction to hydrocarbons is significantly reduced. I understand. As described above, it can be seen that the reaction in the absence of oxygen is superior in the case of using a substance such as a hydrocarbon that does not destroy the environment.

Embodiment 4 The waste treatment apparatus of claims 5 and 6 will be described with reference to FIG. FIG. 8 is a schematic diagram of the waste treatment device when the respective mechanisms are in the same space. Further, FIG. 9 is a flowchart showing the processing steps, and relates to the processing method of claim 17. This waste treatment device is provided with a waste home appliance input port 01, a device crushing unit 111, and a thermal carbonization unit 12.
1, a halogenated hydrocarbon decomposing / halide adsorbing part 131 and an exhaust part 51 are formed in the same space, and a hot dry distillation chamber heater part 12 for raising the temperature of the hot dry distillation part 12
2. A temperature sensor unit A123 for constantly detecting the temperature of the hot carbonization unit 121, a temperature control unit A124 for adjusting the temperature of the thermal carbonization unit, a decomposition unit 131 for halogenated hydrocarbon decomposition and halides, and a catalyst adsorption unit. Agent holder 132, heater part 133 of the halogenated hydrocarbon decomposition part, temperature sensor part B134 for detecting the temperature in the halogenated hydrocarbon decomposition chamber, temperature control part 135 for controlling the temperature in the halogenated hydrocarbon decomposition chamber. A fan 140 and an exhaust port 144 for decomposing the halogenated hydrocarbon and exhausting the halide adsorption unit 131 to the outside are installed.

Specific processing steps will be described with reference to FIG. The waste home electric appliance 03 is thrown in from the waste home appliance throw-in port 01, and the waste home appliance throw-in port 01 is sealed. Then, the device crushing unit 111 crushes the waste home electric appliances. The crushed waste home electric appliances 03 are moved to the thermal carbonization section 121 installed below. In advance, the thermal distillation unit 121 is equipped with a temperature sensor unit A12.
While the temperature is being detected in 3, the temperature is controlled by the heater 122 and the temperature controller 124 controls the temperature to 300 to 500 ° C. The waste home electric appliance 03 is vaporized from the halogenated hydrocarbon-containing foamed resin by the hot dry distillation treatment to be separated into the metal portion 05. The vaporized halogenated hydrocarbons are decomposed by the halogenated hydrocarbons and attracted by the halide adsorbing portion 131 by the fan 140,
It is introduced into the catalyst adsorbent container 132. Put catalyst in advance 13
In order to raise the temperature of the catalyst 60 and the adsorbent 61 filled in 2 to the temperature that promotes the activation of the catalyst 60 by the heater unit 133 of the halogenated hydrocarbon decomposition unit, the temperature sensor unit B134
The temperature is controlled by the temperature control unit 135 while being detected by. The halogenated hydrocarbon causes a decomposition reaction by contacting with the activated catalyst 60,
As a result, hydrocarbons are separated into halides. Further, the halide is adsorbed by the adsorbent 61. The exhaust from which the halide has been removed is exhausted to the outside air through the exhaust port 144.

Embodiment 5 A waste treatment apparatus according to claim 7 will be described with reference to FIG. FIG. 10 is a schematic diagram of a waste treatment device when the respective mechanisms are in the same space. In this waste treatment apparatus, a waste home appliance input port 01, a device crushing section 1ll, a thermal distillation section 121, a halogenated hydrocarbon decomposing section and a halide adsorbing section 131, and an exhaust section are configured in the same space. In this space, a temperature sensor unit A123 for constantly detecting the temperature of the thermal carbonization unit 121, a temperature control unit A124 for controlling the temperature of the thermal carbonization unit, a decomposition unit for halogenated hydrocarbons and an adsorption unit 131 for halides, A catalyst adsorbent holder 132, a fan 14 for decomposing halogenated hydrocarbons and exhausting the halide adsorbing portion 131 to the outside.
0, the exhaust port 144 is installed. Further, it comprises a recovery unit 191 for recovering hydrocarbons discharged from the halogenated hydrocarbon decomposition and halide adsorption unit 131, a transfer unit for transferring to the combustion chamber 192 for use as fuel, and a combustion unit 193. A non-return valve 194 is provided in the transport section, so that it does not return to the reverse.

Specific processing steps will be described with reference to FIG. Waste home appliances input port 01 to waste home appliances 02
To close the waste home appliance input port 01. Then, the device crushing unit 111 crushes the waste home electric appliances. The crushed waste home appliances 03 are installed below. Thermal distillation section 121
Move to. In advance, the thermal distillation unit 121 is equipped with a temperature sensor unit A.
While the temperature is detected by 123, it is heated by a preheater unit (not shown) and is controlled by the temperature control unit 124 at 300 to 500 ° C. The waste home electric appliance 02 vaporizes halogenated hydrocarbons from the halogenated hydrocarbon-containing foamed resin by a hot dry distillation process to separate the halogenated hydrocarbons from the metal part. The vaporized halogenated hydrocarbon is introduced into the catalyst adsorbent container 132 while being drawn by the fan 140 in the halogenated hydrocarbon decomposition and halide adsorption section 131. The halogenated hydrocarbon decomposing / halide adsorbing section 131 is heated to a temperature that promotes catalytic activity by a preheating heater section (not shown). The halogenated hydrocarbon causes a decomposition reaction by coming into contact with the activated catalyst 60, and as a result, the hydrocarbon is separated into a halide. Further, the halide is adsorbed by the adsorbent 61. The exhaust gas containing the hydrocarbon from which the halide has been removed is recovered by the recovery unit 191, and is sent to the combustion unit 192 via the transfer unit. The heat generated in the combustion section 192 is generated by the fan 140 in the thermal carbonization section 12
1 and halogenated hydrocarbons are sent to the decomposition and halide adsorption section 131 and used as a heat source for each of these sections. The heat exchanged heat is exhausted to the outside air through the exhaust port 144.

The effects of using the waste treatment device according to claims 5 to 7 will be described. The waste treatment device according to any one of claims 5 to 7 is defined by claim 1 to claim 4.
Similar to the waste treatment apparatus of No. 1, by performing the treatment from the first treatment process to the fourth treatment process in a sealed state that is shielded from the outside without adding oxygen, the CFC decomposition is promoted and adsorption Intermediate products such as difficult-to-treat aldehydes are reduced. Moreover, since all the steps are performed in the same space, the sealing is more complete and the apparatus is compact. Furthermore, the hydrocarbons discharged when the CFCs are decomposed can be used as a heat source to raise the temperature in the thermal carbonization section, resulting in energy saving.

[Embodiment 6] Regarding the waste treatment equipment according to claims 8 to 11,
This will be described with reference to FIG. FIG. 12 is a schematic diagram of the waste treatment device when the respective mechanisms are in the same space. Further, FIG. 13 is a flowchart showing the processing steps, and relates to the processing method of claim 19. In this waste treatment device, a waste home appliance input port 01, a device crushing section 111, a thermal carbonization section 121, a halogenated hydrocarbon decomposition and halide adsorption section 131, and an exhaust section 51 are configured in the same space. Heater 122 for raising the temperature of the section, temperature sensor section A123 for constantly detecting the temperature of the section 121, temperature controller A124 for adjusting the temperature of the section for hot carbon distillation, halogenation Hydrocarbon decomposition and halide adsorption part 131, catalyst adsorbent holder 1
32, heater part 133 of halogenated hydrocarbon decomposition part,
A temperature sensor unit B134 for detecting the temperature inside the halogenated hydrocarbon decomposition chamber, and a temperature control unit 13 for controlling the temperature inside the halogenated hydrocarbon decomposition chamber.
5, fan 140 for decomposing halogenated hydrocarbons and exhausting from halide adsorption part 131 to outside, exhaust port 1
44 are installed. Further, an exhaust device 90 is installed above the equipment crushing section 111.

Specific processing steps will be described with reference to FIG. Waste home appliances input port 01 to waste home appliances 03
To close the waste home appliance input port 01. Then, the exhaust device 90 is operated to make the inside of the device negative pressure. The device crushing unit 111 crushes waste home electric appliances. The crushed waste home appliances 03 are installed below. It moves to the thermal distillation section 121. In advance, the thermal distillation unit 121 is equipped with a temperature sensor unit A123.
While detecting the temperature with
It is controlled at 300 to 500 ° C. by the temperature control unit 124. The waste home electric appliance 03 vaporizes the halogenated hydrocarbon from the halogenated hydrocarbon-containing foamed resin by the hot dry distillation treatment and separates it from the metal part. The vaporized halogenated hydrocarbon is introduced into the catalyst adsorbent container 132 while being decomposed by the halogenated hydrocarbon and drawn by the fan adsorption unit 131 by the fan 140. The temperature of the catalyst 60 and the adsorbent 61, which are previously filled in the catalyst container 132, is raised by the heater portion 133 of the halogenated hydrocarbon decomposing portion to a temperature that promotes the activation of the catalyst 60. The temperature is controlled by the section 135. Halogenated hydrocarbons are activated catalyst 60
When it comes into contact with, a decomposition reaction occurs, and as a result, hydrocarbons are separated to form halides. Further, the halide is adsorbed by the adsorbent 61. The exhaust from which the halide has been removed is exhausted to the outside air via the exhaust port 144.

[Embodiment 7] With respect to the waste treatment apparatus having the construction shown in Embodiment 6, the treatment method of claim 18 will be explained with reference to the flow chart of FIG. At the start of processing, the exhaust device 90 is set to 0N and exhaust is performed. After the evacuation is completed, the device is filled with nitrogen. The subsequent processing is performed in the same manner as in the sixth embodiment.

The effects of using the waste treatment device according to the eighth to eleventh aspects will be described. Since the waste treatment apparatus according to claims 8 to 11 performs all the steps in the same space as the waste treatment apparatus according to claims 5 to 7, the sealing is more complete and the apparatus is It is made compact. Furthermore, since the inside of the device can be brought to a negative pressure state or a nitrogen atmosphere state by the exhaust device, the Freon decomposition is further promoted, and intermediate products such as aldehydes which are difficult to be adsorbed are further reduced.

[Embodiment 8] A waste treatment apparatus according to claims 12 to 14 will be described with reference to FIG. FIG. 15 is a schematic diagram of a waste treatment device when each mechanism is separated into individual devices. Further, FIG. 16 is a flow chart showing the treatment process when the halogenated hydrocarbon is decomposed while adjusting the flow rate using the flow meter 26, and FIG. 17 is a flow diagram showing the process at the time of maintenance. Is. This waste treatment device is provided with a waste home appliance input port 01, a device crushing chamber 11,
It comprises a thermal carbonization chamber 21, a halogenated hydrocarbon decomposition chamber 31, an adsorption chamber 41, and an exhaust unit 51, and the equipment crushing chamber 11
A device crushing unit 12 is installed inside the. Further, a movable door A13 for partitioning the equipment crushing chamber 11 and the thermal dry distillation chamber 21 and a thermal dry distillation chamber heater unit 2 for raising the temperature of the thermal dry distillation chamber
2. A temperature sensor unit A23 for constantly detecting the temperature of the hot dry distillation chamber, a temperature control unit A24 for adjusting the temperature of the hot dry distillation chamber, a hot dry distillation chamber 21 and a halogenated hydrocarbon decomposition chamber 31.
A connection portion 25 for connecting the above and a flow meter 26 are installed. Further, a catalyst holder 32 for decomposing halogenated hydrocarbons, a halogenated hydrocarbon decomposition chamber heater unit 33, a temperature sensor unit B34 for detecting the temperature in the halogenated hydrocarbon decomposition chamber, a halogenated hydrocarbon decomposition chamber The temperature control section 35 for controlling the temperature is connected to the adsorption chamber 41, the connecting section B42, and the pump 43 for pushing the exhaust gas into the adsorption chamber. The adsorption chamber 41 is filled with an adsorbent 61, and the adsorption chamber 4
An exhaust port 44 for exhausting air from 1 is installed.

Specific processing steps will be described with reference to FIG. Waste home appliances input port 01 to waste home appliances 02
To close the waste home appliance input port 01. Then, it is sent to the equipment crushing section 12 installed in the equipment crushing chamber 11 to crush the waste home electric appliances. The crushed waste home appliances 03 move to the thermal carbonization chamber 21 via the movable door A13. After moving the crushed waste home appliances to the thermal distillation chamber 21, the movable door A
Seal 13 In advance, the thermal distillation chamber 21 is warmed by the heater portion 22 while the temperature is detected by the temperature sensor portion A23, and is controlled to 300 to 500 ° C. by the temperature adjusting portion 24. Waste home appliances that have been crushed in the thermal distillation chamber 21 03
Are vaporized halogenated hydrocarbons from the halogenated hydrocarbon-containing foamed resin by thermal dry distillation to separate them from the metal part. The vaporized halogenated hydrocarbon is exhausted to the halogenated hydrocarbon decomposition chamber 31 while controlling the flow rate by the flow meter 26 via the connection portion 25. The exhausted halogenated hydrocarbon is introduced into the catalyst container 32. In order to raise the temperature of the catalyst 60 previously filled in the catalyst container 32 to the temperature that promotes the activity of the catalyst 60 by the halogenated hydrocarbon decomposition chamber heater section 33, the temperature control section 35 controls the temperature while detecting it by the temperature sensor section B34. Has been done. The halogenated hydrocarbon causes a decomposition reaction by coming into contact with the activated catalyst 60, and as a result, the hydrocarbon is separated into a halide, and the hydrocarbon is recovered.
Further, the halide is conveyed by the pump 43 to the adsorption chamber 41 via the connection pipe 42. The adsorption chamber 41 is filled with an adsorbent 61 and adsorbs the transported halide. The exhaust from which the halide has been removed is the exhaust port 44.
Is exhausted to the outside air via.

FIG. 17 is a flow chart showing the steps of maintenance. Further, at the time of maintenance of a device such as a flow meter, as shown in the flowchart of FIG. 17, a two-way valve 27 and a stop valve 28 are provided, one end of which is connected to nitrogen and the other end is connected to a thermal distillation chamber. After closing the stop valve 28, removing the flow meter, connecting the flow meter again after maintenance, opening the two-way valve to the nitrogen side, opening the stop valve 28, and thoroughly replacing the inside of the flow meter with nitrogen. Again, the 2-way valve shall be returned to the thermal distillation chamber side.

The effect of using the waste treatment device according to the twelfth to fourteenth aspects will be described. When decomposing CFCs (halogenated hydrocarbons), an infinite number of intermediate products are considered, and when decomposing completely and stable,
Even if an adsorption treatment with an adsorbent or a catalyst is attempted, there is a possibility that it will not be adsorbed and will be discharged into the atmosphere, and the treatment may not be completed completely. As one of the reasons, the processing amount may be large relative to the processing capacity. Therefore, it is necessary to control the treatment amount with a flow meter at any time during treatment. Also,
Even during the maintenance of the equipment, the inside of the equipment may be corroded by chlorine and the like due to moisture and oxygen mixed in from the outside. The above problems can be solved by replacing the inside of the flow meter and the inside of the pipe with a gas such as nitrogen during maintenance of the device.

[0068]

EFFECTS OF THE INVENTION The waste treatment device according to any one of claims 1 to 4 has a structure in which a halogenated hydrocarbon gas and a gas containing a halogen compound produced by decomposition of the halogenated hydrocarbon are not leaked out of the treatment device. Therefore, the waste can be treated without degrading the environment. Furthermore, when operating the device, the device can be moved without impairing the health of the person who operates it.

Since all the mechanisms of the waste treatment device according to the fifth to seventh aspects are in the same space, the sealing is more complete and the device is compact. further,
Energy can be saved because the temperature of the dry distillation section can be raised by using the hydrocarbon discharged when the CFCs are decomposed as a heat source.

In the waste treatment device according to any one of claims 8 to 11, since the inside of the device can be brought to a negative pressure state or a nitrogen atmosphere state by an exhaust device, chlorofluorocarbon decomposition is further promoted and aldehydes and the like which are difficult to be adsorbed. The intermediate product of is reduced.

In the waste treatment apparatus according to the twelfth to fourteenth aspects, the flow rate meter controls the treatment amount at any time during the waste treatment, so that the treatment can be performed stably. Further, since the two-way valve is provided, it is possible to suppress corrosion in the device during device maintenance. In the waste treatment method according to any one of claims 15 to 19, the halogenated hydrocarbon gas and the gas containing a halogen compound produced by the decomposition of the halogenated hydrocarbon are decomposed and adsorbed in the absence or small amount of oxygen. Waste containing halogenated hydrocarbon gas can be treated without destroying the same.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a waste treatment device in which each mechanism is separated.

FIG. 2 is a flow chart showing the processing steps in FIG.

FIG. 3 is a flow chart showing processing steps when the apparatus of FIG. 4 is used.

FIG. 4 is a schematic view of an apparatus in which a halogenated hydrocarbon decomposition chamber and a halide adsorption chamber are integrated.

5 is a view showing an example in which a check valve is attached to the device of FIG.

FIG. 6 is a schematic diagram of a waste treatment device provided with a container serving as a device for sealing on the outside.

FIG. 7 is a diagram for explaining the influence of oxygen in the reaction process.

FIG. 8 is a schematic diagram of a waste treatment device when each mechanism is in the same space.

FIG. 9 is a flow chart showing the processing steps in FIG.

FIG. 10 is a schematic diagram of a waste treatment device when using hydrocarbons as fuel.

11 is a flowchart showing the processing steps in FIG.

FIG. 12 is a schematic diagram of a waste treatment device provided with an exhaust device.

FIG. 13 is a flow chart showing the processing steps in FIG.

FIG. 14 is a flow chart showing processing steps in the case of filling the device with nitrogen.

FIG. 15 is a schematic diagram of a waste treatment device provided with a flow rate control device and a two-way valve.

FIG. 16 is a flowchart showing a treatment process when the halogenated hydrocarbon is decomposed while controlling the flow rate.

FIG. 17 is a flow chart showing a process at the time of maintenance.

[Explanation of symbols]

01 ………… Disposal of household electric appliances, 11 ………… Equipment crushing room,
13 ... Movable door, 21 ... Heat-drying chamber, 31 ... Halogenated hydrocarbon decomposition chamber, 41 ... Adsorption chamber, 45 ...
… Decomposition / adsorption chamber, 51 ……… Exhaust part, 60 ………… Catalyst,
61 ... Adsorbent, 70 ... Container, 90 ... Exhaust device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takumi Oikawa, No. 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Kanagawa Prefecture, Ltd., Research Institute for Housing and Space Systems (72) Inventor Tadao Machida, Shinsugita-cho, Isogo-ku, Yokohama, Kanagawa Address Company TOSHIBA Housing & Space Systems Technology Laboratory (72) Inventor Tatsuya Tsuda 3-3-9 Shimbashi, Minato-ku, Tokyo Within Toshiba Abu E., Ltd.

Claims (19)

[Claims] 1. A crushing mechanism for crushing a waste having a halogenated hydrocarbon-containing foamed resin as at least a part of constituent materials, and discharging at least the halogenated hydrocarbons from the waste crushed by the crushing mechanism. A dry distillation mechanism, a decomposition mechanism for decomposing the halogenated hydrocarbon in the discharged gas containing at least a halogenated hydrocarbon, and a decomposition product immobilization mechanism for immobilizing the decomposition product with a catalyst or an adsorbent. In the apparatus for treating waste, the crushing mechanism, the carbonization mechanism, the decomposition mechanism, and the decomposition product immobilization mechanism are at least the halogenated hydrocarbon gas and a halogen compound produced by decomposition of the halogenated hydrocarbon. A waste treatment device having a structure that does not allow gas containing gas to leak out of the treatment device. 2. The waste treatment apparatus according to claim 1, wherein the crushing mechanism, the carbonization mechanism, the decomposition mechanism and the decomposition product fixing mechanism are separated from each other, and gas generated in each mechanism is generated. An apparatus for treating waste, comprising means for not returning to the mechanism before it. 3. The waste treatment device according to claim 1, wherein the decomposition mechanism and the decomposition product fixing mechanism are provided in the same device. 4. The waste treatment apparatus according to claim 1, wherein the crushing mechanism, the carbonization mechanism, the decomposition mechanism, and the decomposition product fixing mechanism are arranged in an apparatus that covers the entire mechanism. A waste treatment device characterized by the above. 5. The waste treatment apparatus according to claim 1, wherein the crushing mechanism, the carbonization mechanism, the decomposition mechanism and the decomposition product fixing mechanism are arranged in the same processing space. Waste treatment equipment. 6. The waste processing apparatus according to claim 5, further comprising means for increasing the temperature of the processing space. 7. The waste treatment apparatus according to claim 6, wherein the means for raising the temperature of the treatment space uses the hydrocarbon discharged from the decomposition mechanism as a heat source. Processing equipment. 8. The waste treatment apparatus according to claim 1, further comprising an exhaust mechanism for exhausting at least one of the respective mechanism spaces. 9. The waste treatment apparatus according to claim 8, wherein the exhaust mechanism is means for exhausting at least the inside of the crushing mechanism space. 10. The waste processing apparatus according to claim 1, further comprising means for making a negative pressure in each of the mechanism spaces. 11. The waste treatment apparatus according to claim 9, further comprising means for filling the evacuated mechanical space with nitrogen after the evacuation. 12. The waste treatment apparatus according to claim 1, further comprising a treatment amount control means in the dry distillation mechanism. 13. The waste processing apparatus according to claim 1, further comprising a processing amount control means in the decomposition mechanism. 14. The waste treatment apparatus according to claim 1, wherein when the decomposition mechanism is replaced, the exhaust gas discharged from the dry distillation mechanism is stopped and a gas containing no water is supplied, and after the decomposition mechanism is replaced. An exhaust gas branch valve capable of switching to a path for supplying the exhaust gas discharged from the dry distillation mechanism to the decomposition mechanism after supplying a gas containing no moisture for a predetermined time is provided in front of the decomposition mechanism. Waste treatment equipment. 15. A first step of crushing a waste having a halogenated hydrocarbon-containing foamed resin as at least a part of a constituent material, and at least the above-mentioned steps by dry distillation of the waste crushed in the crushing step. A second step of discharging a halogenated hydrocarbon, a third step of decomposing the halogenated hydrocarbon in the discharged gas containing at least a halogenated hydrocarbon, and a decomposition product of the decomposition product by a catalyst or an adsorbent. Fourth to be fixed
In the method for treating waste, which comprises the steps of: and at least treating the halogenated hydrocarbon gas and a gas containing a halogen compound produced by the decomposition of the halogenated hydrocarbon without leaking out of the treatment apparatus. Characteristic waste treatment method. 16. The waste treatment method according to claim 15, wherein the processes from the first process to the fourth process are performed in ascending order, and the subsequent process is not performed until the previous process is completed. Waste disposal method. 17. The method for treating waste according to claim 15, wherein the third step and the fourth step are performed at the same time. 18. The method for treating waste according to claim 15, wherein each step is performed in a deoxygenated atmosphere. 19. The method for treating waste according to claim 15, wherein the inside of the treatment apparatus is exhausted before the first step.