JP4577524B2 - Apparatus and method for treating metal-containing waste plastic - Google Patents

Description

The present invention relates to a processing apparatus及beauty method of the metal-containing waste plastics, more particularly, the waste plastics containing the metal is recovered by Yuka plastic component by thermally decomposing the metal-containing and recovering the metal as a concentrated residue relating to the processing apparatus及beauty method of waste plastic.

Conventionally, waste plastics are burned in a stationary furnace using heavy oil as fuel, and waste copper wires are burned in a stationary furnace or kiln, and the coated plastic is burned in the kiln similarly using heavy oil as fuel. It was processed.
However, since the waste plastics are incinerated, the metal residues can be recovered, but the waste plastics cannot be reused. In addition, burning waste plastic may cause generation of hazardous materials such as dioxins, and an exhaust gas treatment facility for removing such hazardous materials is also required.
Therefore, in recent years, in view of the situation such as the depletion of petroleum resources, attention has been focused on recycling waste plastics instead of simply incinerating them.

  Various types of waste plastics oiling equipment have been proposed. For example, Japanese Patent Application Laid-Open No. 2000-176936 (Patent Document 1) discloses a method of converting waste plastic containing metal into oil. In Patent Document 1, waste plastic material obtained by laminating any one or more of organic materials, inorganic materials and metals represented by CD (Compact Disk) on polycarbonate is gasified by melt pyrolysis, and this gas is cooled by a cooler. It is characterized by being condensed and liquefied.

JP 2000-176936 A

However, it is necessary to maintain the operation of the waste plastic oil production facility based on the oil recovery profit, and the facility tends to become large inevitably, and there is a problem in economy in the small-scale facility.
On the other hand, in the case of scrap metal containing a large amount of waste plastics, such as a charger holder for a mobile phone, incineration takes longer if it is processed in a conventional incinerator, and less metal residue can be recovered, resulting in higher processing efficiency. It was not good.
In patent document 1, handling of the metal collect | recovered as a residue is not disclosed.

The present invention aims to provide a processing apparatus及beauty method of the metal-containing waste plastics to allow simultaneous recycling of metals and oil from waste plastics containing metal.

The present invention also aims to provide a processing apparatus及beauty method of the metal-containing waste plastics that can separate the separation is difficult waste metal parts and plastic parts, respectively.

The present invention aims to provide a processing apparatus及beauty method of the metal-containing waste plastics having also economical a small facility.

In order to solve the above problems, the present invention according to claim 1 is directed to a mobile phone and its charger holder, connector / adapter, substrate with resin, CD, organic solvent paste, silicon wafer, packaged IC chip, nickel -Oil-containing cutting waste containing tungsten / molybdenum, and the plastics are oiled and recovered by pyrolyzing the waste plastic containing metal, which is difficult to separate the metal and plastic from the waste plastic containing the metal. the medical treatment apparatus of the metal-containing waste plastics to recover the metal as a concentrated residue, a cylindrical inner tube having a space for accommodating the metal-containing waste plastics inside the body where the inner cylinder is detachably disposed comprising, heating the waste plastics containing the metal charged into the interior of the inner tube by the heating means, of the thermal decomposition of waste plastics With gasified Te, the metal a thermal decomposition tank for collecting good releasability as a metal residue, and the thermal decomposition layer which is capable of continuous processes by replacing the inner cylinder, which is generated by the thermal decomposition vessel The cooling oil is cooled by injecting the cooling oil into the gas from the injection nozzle, and the cooling oil is stored in the circulation tank and reused for cooling the gas, and the gas cooled by the cooling tower. A condenser that collects the oil as oil, a combustion device that incinerates the unburned gas that could not be collected in the condenser and the exhaust gas generated in the heating means, and an inner cylinder that is removed from the main body of the pyrolysis tank is supported to be tiltable. And a take-out device for collecting metal residue from the inner cylinder in a tilted state . The inner cylinder has an upper upper lid that can be opened and closed, a hanging hook for replacement, and an air nozzle for preventing overheating. Provided Is, the heating means is characterized by comprising the oil recovered by the condenser is available formed as a fuel.

In order to solve the above problems, the present invention according to claim 2 is directed to a mobile phone and its charger holder, connector / adapter, resin-coated substrate, CD, organic solvent paste, silicon wafer, packaged IC chip, nickel -Oil-containing cutting waste containing tungsten / molybdenum, and the plastics are oiled and recovered by pyrolyzing the waste plastic containing metal, which is difficult to separate the metal and plastic from the waste plastic containing the metal. A method for treating a metal-containing waste plastic that collects the metal as a concentrated residue, comprising: a cylindrical inner cylinder having a space for containing the metal-containing waste plastic therein; and a main body on which the inner cylinder is detachably disposed. with the waste plastics containing the metal in the interior of the inner tube of the pyrolysis vessel was charged, air to avoid overheating, which is provided in the inner cylinder A step of gasifying by thermally decomposing waste plastics by heating to 200 to 600 ° C. by heating means while utilizing a nozzle, for injecting cooling oil from the injection nozzle to the gas generated by the heat content in the cooling tower The cooling oil is used for cooling the gas again, the step of recovering the cooled gas as oil, the unburned gas that could not be recovered as oil and the exhaust gas generated in the heating means. The step of incineration by the combustion device, the step of using the recovered oil as fuel for the heating means, the inner cylinder removed from the pyrolysis tank is tilted by the removal device, and the metal residue is removed from the inner cylinder with good releasability. a step recovering, and, equipped with a separate inner tube in the body of the thermal decomposition vessel, treating the waste plastics containing the new metal It provides the configured processing method of the metal-containing waste plastics composed by comprising the step of performing a continuous process by the.

In order to solve the above problems, the present invention according to claim 6 is characterized in that, in the method for treating metal-containing waste plastic according to claim 5 , the waste plastic is thermally decomposed at 200 to 600 ° C.

In order to solve the above-mentioned problem, the present invention described in claim 7 further includes the step of using the recovered oil as a fuel for the heating means in the method for treating a metal-containing waste plastic according to claim 4 or 5. It is characterized by comprising.

According to the processing apparatus及beauty method of the metal-containing waste plastics according to the present invention, the waste plastics containing the metal as well as Yuka it is gasified by pyrolysis, be recovered smelting raw material metal as a residue This has the effect of enabling simultaneous recycling of metal and waste plastic. In addition, when processing by incineration, the more plastic content, the longer it takes to incinerate. On the contrary, the efficiency is poor, but the present invention has an effect that oil can be recovered as the plastic content increases.

  In addition, there is an effect that even if it is difficult to separate the metal part and the plastic part, they can be separated.

  Furthermore, since the metal is collected, there is an effect that economics can be secured even in a small-scale facility.

  In addition, since the treated product is not directly burned, the amount of exhaust gas is reduced, and there is an effect that the amount of environmental pollutants emitted to the atmosphere is reduced.

Hereinafter, the processing apparatus及beauty method of the metal-containing waste plastics according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a metal-containing waste plastic processing apparatus according to the present invention. First, the metal-containing waste plastic processing apparatus will be described, and then the metal-containing waste plastic processing method will be described together with its operation.

  The metal-containing waste plastic processing apparatus 1 shown in FIG. 1 generally includes a pyrolysis tank 10, a gas cooling tower 20, a condenser 30, a circulation tank 40, a fuel tank 50, a burner 60, An unburned gas combustion device 70 is provided.

Thermal decomposition tank 10, as shown in FIGS. 3 and 4, a cylindrical inner tube 15 having a space for accommodating the metal-containing waste plastics inside, place the inner cylinder 15 detachably A main body 11 is provided, and a burner 60 as a heating means for heating the inner cylinder 15 is provided on the lower side of the main body 11. The inner surface of the main body 11 is covered with a refractory material 13 so as to withstand the heating by the burner 60.

  The inner cylinder 15 is formed in a cylindrical shape from a metallic material so as to withstand the heating and internal pressure when the waste plastic is thermally decomposed. In this embodiment, SUS is used. Of course, the present invention is not limited to this, and a heat-resistant material can be attached to the inside or a heat-resistant paint can be coated. SUS is a preferable material because the metal residue 7 remaining as a heating residue has good peelability and the metal residue 7 can be easily recovered. An upper lid 15a is provided on the upper side of the inner cylinder 15 to open and close the metal-containing waste plastic to be treated and to take out the metal residue 7 after pyrolysis. The upper lid 15a is provided with a gas exhaust pipe 15b for sending the gas 3 generated by thermally decomposing waste plastic to the gas cooling tower 20. The gas exhaust pipe 15 b is connected to the gas cooling tower 20. Further, a plurality of hooks 15c for suspending the inner cylinder 15 are arranged on the upper lid 15a. For example, a hanging tool such as a crane is hooked on the hook 15c, and the inner cylinder 15 is attached and detached. The inner cylinder 15 is provided with an air nozzle 15d for preventing overheating.

  Examples of the metal-containing waste plastic that is put into the pyrolysis tank 10 include a mobile phone and its charger holder, connectors and adapters, a substrate with resin, a CD, an organic solvent paste, a silicon wafer, a packaged IC chip, Oil-containing cutting scraps (nickel, tungsten, molybdenum, etc.) that are difficult to easily separate metal and plastic are targeted. Examples of plastic materials include polyurethane, methacrylic resin, urea resin, polystyrene, ABS resin, polypropylene, polyethylene, and other plastics and oil-containing resins. In order to secure the amount of oil 5 to be recovered, the resin content is preferably 50% or more. By throwing these waste plastics into the thermal decomposition tank 10 and heating them to about 200-600 ° C., the waste plastics are thermally decomposed and gasified, and sent to the gas cooling tower 20.

  The gas cooling tower 20 connected to the gas exhaust pipe 15b cools the gas 3 in which the waste plastic sent from the thermal decomposition tank 10 is thermally decomposed. The gas cooling tower 20 cools the gas 3 by lowering the temperature by injecting cooling oil (cooling by circulating oil) into the gas 3 that has been sent by the injection nozzle 21. On the other hand, the injected cooling oil is stored in the circulation tank 40 and is used again for cooling the gas 3. The cooled gas 3 is sent to the condenser 30.

  The condenser 30 condenses the gas 3 cooled by the gas cooling tower 20 with cooling water (industrial water) and stores it as oil 5. The oil 5 stored in the condenser 30 is transported to the fuel tank 50 and stored. In the present embodiment, a part of the oil 5 stored in the fuel tank 50 is supplied to the burner 60 and used for gasification of waste plastic in the thermal decomposition tank 10. Thereby, fuel, such as heavy oil for operating the burner 60, can be saved or made unnecessary.

  Furthermore, the processing apparatus 1 is provided with a combustion device 70, and performs exhaust gas treatment in which unburned gas that cannot be recovered and stays in the condenser 30 is sent to the combustion device 70 to be completely incinerated and exhausted. . In addition, some waste plastics to be treated contain chlorine, so that the treatment is performed by completely burning the chlorine. Further, exhaust gas when the burner 60 is burned in the thermal decomposition tank 10 is also sent to the combustion device 70 through the exhaust pipe 17.

  The processing apparatus 1 configured as described above processes the metal-containing waste plastic, but the inner cylinder 15 that has been processed is removed from the main body 11 and the metal residue 7 remaining inside is recovered. The recovery of the metal residue 7 is performed by a metal residue 7 extraction device 90 as shown in FIG. That is, the take-out device 90 is formed by standing upright two struts 93, 93 on a base 91, and the inner cylinder 15 can be tilted to a support member 93a provided in the middle of the struts 93, 93. The metal residue 7 is transferred to the recovery container 97 and recovered by tilting the inner cylinder 15 from which the upper lid 15a has been removed.

  Further, when the inner cylinder 15 is moved to the take-out device 90, it is not efficient that the processing device 1 does not operate. Therefore, as shown in FIG. 5, a plurality of inner cylinders 15 are prepared, and the inner cylinder 15 after the thermal decomposition process is cooled, and a standby cooling zone 100 for waiting until the next use is provided, which is not illustrated. The continuous processing is enabled by carrying out the operation of attaching the plurality of inner cylinders 15 to the main body 11 of the pyrolysis tank 10 in order by the overhead crane. That is, the inner cylinder 15 that has been processed in the thermal decomposition tank 10 is once transported to the standby cooling zone 100 and cooled by air cooling, and then the internal metal residue 7 is recovered by the extraction device 90. During this time, the inner cylinder 15 whose metal residue 7 has already been collected is mounted on the main body 11 of the thermal decomposition tank 10 and the thermal decomposition process proceeds. In the present embodiment, continuous processing is performed by preparing five inner cylinders 15.

  Next, the processing method of the metal containing waste plastic concerning this invention is demonstrated with operation | movement of the processing apparatus 1 of the metal containing waste plastic mentioned above. FIG. 6 is a flowchart of an embodiment of the method for treating metal-containing waste plastic according to the present invention.

First, the metal-containing waste plastic is put into the inner cylinder 15 of the pyrolysis tank 10 (step S1). And the burner 60 is ignited and the inner cylinder 15 is heated, and the metal containing waste plastic put into the inside is thermally decomposed (step S2). Heating is performed at about 200-600 ° C. Decomposes well at 600 ° C. Since the temperature varies depending on the waste plastic to be treated, it is advisable to adjust the temperature appropriately. The gas 3 thermally decomposed by the heating by the burner 60 is sent to the gas cooling tower 20 and injected with cooling oil to be cooled and liquefied. The liquefied gas 3 becomes oil 5 in the condenser 30 and is converted to oil (step S3).

  The oiled oil 5 is stored in the fuel tank 50 (step S4). The stored oil 5 can be recovered as appropriate, but this oil 5 can also be used as fuel for the burner 60. In this embodiment, this oil 5 is sent to the burner 60 and supplied as fuel (step S5). Further, exhaust gas treatment is performed by the combustion device 70 on the exhaust gas generated by the combustion of the burner 60 in the thermal decomposition tank 10 and the gas containing unburned gas and chlorine staying in the condenser 30 (step S6).

The inner cylinder 15 that has been subjected to the thermal decomposition is hooked on the hook 15c by an overhead crane (not shown), removed from the main body 11 of the thermal decomposition tank 10, and carried to the standby cooling zone 100 (step S7). After being allowed to cool for about 2 to 3 hours, the metal residue 7 is removed from the inner cylinder 15 (step S8). The extracted metal residue 7 is used as a metal smelting raw material. During this time, another inner cylinder 15 is installed in the main body 11 of the thermal decomposition tank 10 and the thermal decomposition treatment of the waste plastic is continued, and the inner cylinder 15 is handled. When the removal of the metal residue 7 is completed, the waste plastic containing the metal attached to the main body 11 of the thermal decomposition tank 10 is charged again, and this is sequentially repeated thereafter.

  When 10 kg of the charger holder of the mobile phone was treated, 6 kg of oil that can be used as fuel oil and 2 kg of oily residue could be recovered. There was no plastic content in the oil residue, and it was usable as a metal smelting raw material. Films, vinyl chloride, resins containing phenol resins, and PET resin materials were difficult to oil.

According to the processing apparatus及beauty method of the metal-containing waste plastics according to the present invention described above, it is possible to separate them waste plastics containing efficiently separate hard metal of the metal, a small facility It is possible to secure economic efficiency.

  As described above, the preferred embodiment of the present invention has been described in detail. However, the present invention is not limited to the specific embodiment, and within the scope of the gist of the present invention described in the claims, Needless to say, various modifications and changes are possible.

[BRIEF DESCRIPTION OF THE DRAWINGS] It is a block diagram of one Embodiment of the processing apparatus of the metal containing waste plastic based on this invention. It is a side view which shows the state which takes out a metal residue from an inner cylinder with a taking-out apparatus. It is side surface sectional drawing of a thermal decomposition tank. It is a top view of an inner cylinder. It is a top view which shows a taking-out apparatus and a standby cooling zone. It is a flowchart of one Embodiment of the processing method of the metal containing waste plastic which concerns on this invention.

DESCRIPTION OF SYMBOLS 1 Processing apparatus 3 Gas 5 Oil 7 Metal residue 10 Pyrolysis tank 11 Main body 13 Refractory material 15 Inner cylinder 15a Top lid 15b Gas exhaust pipe 15c Hook 15d Air nozzle 17 Exhaust pipe 20 Gas cooling tower 21 Injection nozzle 30 Condenser 40 Circulation tank 50 Fuel Tank 60 Burner 70 Combustion device 90 Extraction device 100 Standby cooling zone

Claims (2)

Mobile phone and its charger holder, connector / adapter, resin substrate, CD, organic solvent paste, silicon wafer, packaged IC chip, oil-containing cutting waste containing nickel, tungsten, molybdenum, metal and plastic This is a treatment equipment for metal-containing waste plastic that recovers the plastic content by oil decomposition by thermally decomposing waste plastic containing metal that is difficult to separate, and recovering the metal as a concentrated residue from the waste plastic containing metal. There,
A cylindrical inner cylinder having a space for containing metal-containing waste plastic inside, and a main body on which the inner cylinder is detachably disposed, and heats the waste plastic containing metal thrown into the inner cylinder was heated by means of the waste plastics as well as gasified by thermal decomposition, the metal a thermal decomposition tank for collecting good releasability as a metal residue, continuous processing is possible by exchanging the inner cylinder and the thermal decomposition layer,
The gas is cooled by injecting cooling oil to the gas generated in the pyrolysis tank from an injection nozzle, and the cooling oil is stored in a circulation tank and reused for cooling the gas. A cooling tower,
A condenser for recovering the gas cooled in the cooling tower as oil;
A combustion device for incinerating unburned gas that could not be recovered in the condenser and exhaust gas generated in the heating means;
A take-out device for tiltably supporting the inner cylinder removed from the main body of the pyrolysis tank, and collecting the metal residue from the inner cylinder in a tilted state;
With
The inner cylinder has an upper upper lid that can be opened and closed, and is provided with a hanging hook for replacement and an air nozzle for preventing overheating,
The heating means is formed so that the oil recovered by the condenser can be used as fuel,
An apparatus for treating metal-containing waste plastics. Mobile phone and its charger holder, connector / adapter, resin substrate, CD, organic solvent paste, silicon wafer, packaged IC chip, oil-containing cutting waste containing nickel, tungsten, molybdenum, metal and plastic In a method for treating metal-containing waste plastics, the waste plastics containing metals that are difficult to separate are thermally decomposed to recover the plastics into oil, and the metals are recovered from the waste plastics containing metals as concentrated residues. There,
Waste plastic containing the metal inside the inner cylinder of a thermal decomposition tank provided with a cylindrical inner cylinder having a space for containing metal-containing waste plastic inside and a main body on which the inner cylinder is detachably disposed. And thermally decomposing the waste plastic by heating to 200 to 600 ° C. by a heating means while utilizing an air nozzle for preventing overheating provided in the inner cylinder, and gasifying,
Cooling the gas by injecting cooling oil into the gas generated by the heat in the cooling tower from an injection nozzle, and using the cooling oil again for cooling the gas; and
Recovering the cooled gas as oil;
Incineration of unburned gas that could not be recovered as oil and exhaust gas generated in the heating means with a combustion device;
Utilizing the recovered oil as fuel for the heating means;
Taking the inner cylinder removed from the pyrolysis tank in a tilted state by a take-out device , and recovering the metal residue from the inner cylinder with good peelability; and
Attaching another inner cylinder to the main body of the pyrolysis tank, and performing a continuous treatment by treating waste plastic containing new metal;
A method for treating a metal-containing waste plastic comprising:

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