JPH0737457A - Method and device for recovery of conductor of covered wire - Google Patents

Abstract

PURPOSE:To effectively process a covered wire as a waste material so as to recover a conductor as a raw material by carrying out hat treatment in vacuum atmosphere and separation treatment between the conductor and the cover in a heating chamber and a separation chamber arranged up and down. CONSTITUTION:A covered waste wire to be input into an input hopper 1 provided with an input valve 6 is heated in vacuum atmosphere in a heat treatment chamber 3, and the covering material is carbonized into brittle substance facilitating separating from a conductor. The covered waste wire is separated into the conductor and the cover in a separation chamber 5 situated below the treatment chamber 3. In this small structure, the covered wire as waste material is effectively separated into the conductor and the cover, and the conductor is recovered as an original material. Vacuum exhaust gas is combusted by a combustor 19 before being emitted to the open air.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to core wire recycling of covered electric wires as waste materials.

[0002]

2. Description of the Related Art A coated electric wire, which is a waste material generated in electric wiring work, has a high added value. Therefore, a method of burning the coating material to take out the core wire has been used for a long time in order to use it as a recycled raw material. Came. However, combustion exhaust gas and flue gas accompanying combustion become a significant pollution source, and a large-scale device is required for combustion processing without pollution,
It is difficult to put it into practical use because of its economical efficiency. As an alternative method, a method of mechanically stripping the coating material from the core wire has been adopted, but with the miniaturization of electrical equipment in recent years, multicore coated wires using thin core wires are often used. This method has become difficult not only economically but also technically.

[0003]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention By eliminating the above-mentioned problems of the conventional combustion treatment system and mechanical stripping system, the covering material and the core wire can be efficiently separated and recovered by a small-scale facility. And a device therefor.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a technique for heating a coated electric wire in a vacuum atmosphere to efficiently separate a coating material and a core wire. In a vacuum atmosphere, the oxygen required for combustion is lean, so even if the coating material is heated to reach its ignition temperature, the coating material does not burn. A part of the coating material is melted and then evaporated to become a gas, which is sucked by an evacuation device, and most of the coating material is changed to a brittle substance mainly containing carbide. According to the results of basic experiments, a large part of the coating material that was vacuum-heated was peeled off during the treatment, and the one that remained attached to the core wire was extremely brittle, and could easily be separated from the core wire by applying a slight force. To be done.

Since the gas sucked by the vacuum evacuation device is evaporative gas, it is extremely small in quantity, unlike the combustion exhaust gas in the combustion treatment system. Therefore, when the evacuation device burns the evaporative gas after being sucked and before being released into the atmosphere, the amount of combustion exhaust gas generated is small.

[0006] The coated electric wire as a waste material is thrown into a throwing hopper. The closing valve provided in the lower part of the hopper is opened, the charging valve is charged into the supply chamber, and the closing valve is closed. The evacuation device is operated, the supply chamber, the heat treatment chamber, and the storage chamber are each kept under a vacuum atmosphere, and the heating device is activated.

When the degree of vacuum in each chamber reaches a predetermined value, the supply valve provided at the bottom of the supply chamber is opened and the covered electric wire is loaded into the heat treatment chamber. Among the coating materials, the one with the lowest melting temperature begins to melt, becomes liquid, and begins to evaporate. The evaporative gas is sucked by the vacuum exhaust device, and the combustible gas is burned by the combustor and released to the atmosphere.

During the treatment in the heat treatment chamber, the degree of vacuum in the chamber changes due to the evaporative gas generated from the coating material, but at the end of the treatment, it stabilizes at a constant value. This indicates that the treatment of the covering material is completed, and at this time, the discharge valve provided at the bottom of the heat treatment chamber is opened to discharge the buried covered electric wire to the storage chamber. After the discharge, the discharge valve is closed and an inert gas is introduced into the storage chamber to return the storage chamber to atmospheric pressure. After that, the discharge valve provided in the lower part of the storage chamber is opened and charged into the separation chamber. After the charging of the separation chamber is completed, the discharge valve is closed and the vacuum atmosphere is maintained again.

A crushing device is provided at the entrance of the separation chamber to separate the treated coating material from the core wire. Air is blown into the separation chamber, and the powdery and granular coating materials separated by the suction device are sucked and collected by a collection device provided in front of the suction device. After separating and collecting the covering material, the door of the separation chamber is opened and the core wire is taken out.

Since a supply chamber and a storage chamber for holding a vacuum atmosphere are provided above and below the heat treatment chamber, the treatment work can be carried out semi-continuously. Further, the separated and collected coating material is mainly made of carbide, and thus can be reused as fuel.

[0011]

EXAMPLES Examples will be described with reference to the drawings.
FIG. 1 shows a partial cross section and a device configuration of an apparatus for carrying out the method of the present invention for separating a core wire from a covered electric wire as a waste material and recycling it as a raw material. A charging hopper 1, a supply / acquisition chamber 2, a heat treatment chamber 3, a storage chamber 4, and a separation chamber 5 are provided. In order to keep the supply chamber 2, the heat treatment chamber 3, and the storage chamber 4 in a vacuum atmosphere, a charging valve 6 , Supply valve 7, discharge valve 8, discharge valve 9
Is provided.

A heating device 10 and a guide device 11 are provided inside the heat treatment chamber 3, and vacuum exhaust pipes 12, 13 and 14 are connected to the supply chamber 2, the heat treatment chamber 3 and the storage chamber 4, respectively. Vacuum sluice valves 15, 16 and 17 attached to the passage
Is connected to the vacuum exhaust device 18 via the, and a combustor 19 is arranged on the atmosphere side of the vacuum exhaust device 18. Piping 2 for supplying an inert gas to the supply chamber 2 and the storage chamber 4.
0, 21 are connected and supplied by gate valves 22, 23,
Shutdown takes place. When opening the closing valve 6 provided in the lower part of the charging hopper 1, the sluice valve 22 is opened and the supply chamber 2 is returned to atmospheric pressure.

A crushing device 24 is provided inside the separation chamber 5, a container 25 for accommodating the core wire separated from the covering material is arranged, and a door 26 is opened so that the core wire can be taken out together with the container 25. There is. In the separation chamber 5, an air blowing pipe 27 and a sluice valve 28, a suction device 29 for sucking the powdery and granular coating material at the time of air blowing, and a collecting device 30 are arranged.

[0014]

Since the present invention is constructed as described above, it has the following effects.

Since the coating material is heat-treated in a vacuum atmosphere, the coating material is changed to a brittle substance containing mainly carbides, which facilitates separation from the core wire.

The gas processing device can be small-scale.

[Brief description of drawings]

FIG. 1 shows a partial cross section of an apparatus for separating a covered electric wire into a covering material and a core wire in a vacuum atmosphere and an overall device configuration.

[Explanation of symbols]

 1 input hopper 2 supply chamber 3 heat treatment chamber 4 storage chamber 5 separation chamber 6 input valve 7 supply valve 8 discharge valve 9 discharge valve 10 heating device 11 guide device 12, 13, 14 vacuum exhaust pipe 15, 16, 17 vacuum gate valve 18 Vacuum Exhaust Device 19 Combustor 20, 21 Pipes 22, 23 Gate Valve 24 Crusher 25 Container 26 Door 27 Air Blow Pipe 28 Gate Valve 29 Suction Device 30 Collection Device

Claims (2)

[Claims] 1. A method of heating a coated electric wire as a waste material in a vacuum atmosphere to separate a core wire from the coating material and recover the core wire. 2. A supply hopper (1), a supply chamber (2), a heat treatment chamber (3), a storage chamber (4) and a separation chamber (5), and the supply chamber (2) and the heat treatment chamber ( 3), the storage chamber (4) is connected to the vacuum exhaust device (18) by a pipe, and each of the chambers is kept in a vacuum atmosphere so that a charging valve (6), a supply valve (7), and a discharge valve (8). A discharge valve (9) is provided, and a heating device (1) is provided inside the heat treatment chamber (3).
0) is provided, and a core wire recovery apparatus for a coated electric wire is provided in which a separation chamber (5) for separating the coating material that has been embrittled by heat treatment from the core wire is arranged.