WO2011013860A1

WO2011013860A1 - Method for treating waste communication cables

Info

Publication number: WO2011013860A1
Application number: PCT/KR2009/004173
Authority: WO
Inventors: 황성일; 현준목; 조종수; 김영선
Original assignee: (주)엠비즈텍씨앤씨
Priority date: 2009-07-27
Filing date: 2009-07-27
Publication date: 2011-02-03
Also published as: KR100983819B1

Abstract

The present invention relates to a method for treating waste communication cables in order to recycle the waste communication cables as resources. According to the present invention, the method treats the waste communication cables to be recycled using a coating release agent for treatment of the waste communication cables, wherein the coating release agent includes: a penetrant for slackening a coating of a waste communication cable; a swelling agent for swelling the coating slackened by the penetrant; and a release activator for activating release of the coating to easily release the coating swelled by the swelling agent. Thus, a conductor such as copper and a polymer compound such as a polyethylene resin in the waste communication cables can be collected separately in an environmental-friendly manner for recycling.

Description

Waste Communication Line Treatment Method

The present invention relates to a treatment method for recycling waste communication lines.

Communication cable uses copper wire or aluminum wire with low electrical resistance as a medium for transmitting information. Since electrical resistance increases when impurities of different components are mixed, a high purity copper copper wire close to 100% is usually used. High-purity copper copper is an expensive resource that is expensive to manufacture.

Communication lines such as copper wires are usually coated with a coating material such as polyethylene (PE) to avoid damage or short circuit due to external exposure. Each copper wire used for the cable is coated with a PE sheath of 1mm or more and then bundles each communication wire together. Jelly is impregnated to each bundle to protect the telecommunication bundle from water and damage.

As these communication lines are used a lot, the amount of generated waste wires is gradually increasing. Disposal of such a waste communication line is not appropriate in terms of waste of resources and environmental protection, and much effort is required for the disposal of the waste communication line.

Currently, there is a method of collecting only raw materials from incineration of waste communication lines impregnated with sticky jelly, but only copper is collected by incineration, but there are problems of environmental pollution and waste of resources due to incineration, and copper collected due to deterioration of copper purity. There was a problem that the value of.

In addition, since the composite coated wires were pulverized into fine powder and only copper was collected and the coated synthetic resin was disposed of as a method of collecting resources from the composite coated waste wires of polyvinyl chloride (PVC) and polyethylene (PE). There was a problem of wasting costs and resources.

Korean Patent Application No. 10-2005-0028921 (name of the invention: Apparatus and method for collecting copper jelly polyethylene from a closed telecommunication line) and Korean Patent Application No. 10-2004- among several technologies proposed to solve the conventional problems. 0081146 (name of the invention: an apparatus for separating polyethylene resin and metal from waste communication lines) discloses a technique for dissolving and collecting jelly and polyethylene using toxic toluene. However, toluene is highly explosive and is used as a basic raw material of trinitrotoluene (TNT) explosives. Toluene is toxic and is a representative hazardous substance to human body and environment. Polyethylene is not easily dissolved in toluene. It is not collected. In addition, the boiling point of toluene is 110 degrees Celsius, but the treatment of toluene at a heating temperature of 150 ° C. has a problem in that a sudden explosion of vapor pressure causes a high risk of explosion or toxic gas leakage.

Accordingly, an object of the present invention is to provide a method for treating a waste communication line which can collect and recycle a compound used in a conductor and a coating such as copper of a waste communication line in an environmentally friendly manner.

The coating release agent for treating waste communication lines according to the present invention for achieving the above object is a penetrant to relax the coating of the waste communication line; Swelling agent for swelling the coating loosened by the penetrant; And a release activator for activating the release of the coating so that the peeling of the coating swollen by the swelling agent can be made smoothly.

The coating release agent is characterized in that it further comprises glycerin.

The waste communication line treatment method according to the present invention for achieving the above object is a peeling step of peeling the coating of the waste communication line by injecting the waste telecommunication line treatment coating release agent and the waste communication line in the reaction tank; A conductor collection step of collecting the conductor of the closed communication line from which the sheath has been peeled off in the stripping step from the reactor; And a polyethylene collecting step of collecting polyethylene from the coating and the coating release agent peeled off in the peeling step. Characterized in that it comprises a.

Here, the polyvinyl chloride collection step of collecting the polyvinyl chloride (PVC) by adding a flocculant in the reaction tank in which polyethylene is collected in the polyethylene collection step; It is characterized by another comprising a further.

Furthermore, after the polyvinyl chloride is collected in the polyvinyl chloride collection step, a recycling step of separating and collecting a flocculant and a coating release agent from the residue remaining in the reactor; It is characterized by another comprising a further.

A jelly dissolving step of dissolving the jelly-impregnated jelly and impregnated jelly in the waste communication line by introducing a jelly dissolving agent and a jelly-impregnated waste communication line; And a waste communication preliminary step of collecting the waste communication line from which the jelly is dissolved and removed in the jelly dissolving step from the reactor. It further comprises, The closed communication line in the peeling step is characterized in that the jelly is a closed communication line in which the jelly is removed in another step.

A jelly dissolving step of separating the components of the jelly dissolving agent from the jelly dissolving agent in which the jelly is dissolved; It is characterized by another comprising a further.

Furthermore, a petroleum solvent capable of dissolving the jelly of a jellyfish impregnated lung communication line; Water to suppress volatility of the petroleum solvent; And an emulsifier having an affinity for the petroleum solvent and the water to assist mixing of the petroleum solvent and the water; It is another feature to include a.

Jelly dissolving agent for treating the waste communication line according to the present invention for achieving the above object is a petroleum solvent capable of dissolving the jelly of the waste communication line impregnated with jelly (含浸); Water to suppress volatility of the petroleum solvent; And an emulsifier having an affinity for the petroleum solvent and the water to assist mixing of the petroleum solvent and the water; Characterized in that it comprises a.

The method for processing a waste communication line according to the present invention for achieving the above object is a jelly dissolving step of dissolving the jelly impregnated in the waste communication line by injecting the jelly dissolving agent and the jelly-impregnated waste communication line in the reaction tank; And a waste communication preliminary step of collecting the waste communication line from which the jelly is dissolved and removed in the jelly dissolving step from the reactor. Characterized in that it comprises a.

The method for treating waste communication lines according to the present invention has the advantage that it can be separated and collected in an environmentally friendly manner in order to recycle conductors such as copper and polymer compounds such as polyethylene of waste communication lines, and re-use raw materials used to treat waste communication lines. As a result, cost is reduced and safety is improved in treating closed communication lines.

1 is a flowchart schematically illustrating a method for treating a closed communication line according to an exemplary embodiment of the present invention.

2 is a photograph showing a closed communication line impregnated with jelly in the method for processing a closed communication line according to an embodiment of the present invention.

3 is a photograph showing a closed communication line in which jelly is removed in a method for processing a closed communication line according to an exemplary embodiment of the present invention.

4 is a photograph showing a conductor (copper) in a closed communication line after the coating is peeled off in the method for treating a closed communication line according to an embodiment of the present invention.

5 is a photograph schematically showing a polyethylene aggregate separated from a waste communication line in a waste communication line treatment method according to an embodiment of the present invention.

S110: jelly melting step S120: closed communication bowing step

S210: Peeling step S220: Conductor collecting step

S230: Polyethylene collection step S240: Polyvinyl chloride collection step

S250: Recycling Step

Hereinafter, with reference to the accompanying drawings to be described in more detail with respect to the present invention will be described with reference to a preferred embodiment.

Prior to describing an embodiment of the present invention, the jelly-impregnated closed communication line described herein is a communication wire such as a telephone, and is coated with polyethylene on a copper wire for the purpose of insulation, waterproofing, and insulation in the space between the communication line and the communication line. It refers to a communication line in a closed communication cable impregnated with jelly (polymer jelly or gel type compound such as silicon, acrylic, styrene, etc.) for the purpose of waterproofing. And PE, PVC composite wire refers to waste wire mixed with polyethylene and polyvinyl chloride in insulation coating or mixed when dismantling for disposal.

First, the jelly dissolving agent and the coating release agent used in the method for treating a waste communication line according to an embodiment of the present invention will be described.

Jelly dissolving agent that can be used in the method of treating the waste communication line according to an embodiment of the present invention comprises a petroleum-based solvent, more preferably comprises water and an emulsifier.

Petroleum solvents included in the jelly dissolving agent can dissolve the jelly impregnated in the waste communication line, and may include naphtha, kerosene, diesel oil, gasoline, and the like. Kerosene (specific gravity: 0.79 ~ 0.85 / boiling point: 150 ~ 300 ℃) and diesel oil (specific gravity: 0.81 ~ 0.88 / boiling point: 200 ~ 350 ℃) have high boiling point, so it is difficult to purify and reuse by distillation after process. Is difficult to purchase in small quantities (drums) for chemical plants.

Therefore, it is preferable to use a gasoline (specific gravity: 0.63 ~ 0.76 / boiling point 30 ~ 150 ℃) that is relatively low boiling point is easy to reuse after distillation separated from the process and easy to purchase a small amount.

The water that can be included with the petroleum solvent in the jelly dissolving agent is preferably included in the jelly dissolving agent in that it can suppress volatility and lower flammability and human toxicity.

The emulsifiers that can be included in the jelly dissolving agent are amphiphilic with respect to the polar group of water and the non-polar group of petroleum solvents, so that the water and the petroleum solvent can be mixed. Thus, the emulsifier may be mixed with water and a petroleum solvent to form a jelly solubilizer in the form of an emulsion.

As such emulsifiers, nonionic surfactants can be used. Among them, it is preferable to use polysorbate. Polysorbate is a human-friendly nonionic surfactant used in the manufacture of food and cosmetics.

In the case of using polysorbate, polysorbate 20 (see formula 1-1), polysorbate 60, polysorbate 80 (see formula 1-2) can be used arbitrarily selected.

[Formula 1-1: polysorbate 20]

[Formula 1-2: polysorbate 80]

Such jelly solubilizer may be prepared by the following method.

Water and emulsifiers are mixed at a weight ratio of 1: 0.01 to 1: 0.5. And gasoline is added so that a weight ratio of water and gasoline may be a weight ratio of 1: 0.5 to 1: 2. It can be prepared by mixing in such a weight ratio, the jelly solubilizer including water, emulsifiers and gasoline with an homogenizer (emulsion).

Such jelly dissolving agent is emulsified by mixing petroleum solvent and water, and has the advantage of improving fire stability and low volatility of jelly dissolving agent. There is an advantage to this.

Next, the coating release agent that can be used in the method for treating a waste communication line according to an embodiment of the present invention includes a penetrant, a swelling agent, and a release activator, and glycerin (Glycerin) or glycols (glycol: ethylene glycol, propylene glycol). Diethylene glycol, triethylene glycol, dipropylene glycol, hexylene glycol, butylene glycol) It is preferable that it further comprises.

The penetrant penetrates into the coating while gently dissolving the coating and relaxes the tissue of the coating. NMP (N-Methyl-2-pyrrolidone. (C ₅ H ₉ NO) Formula 2) may be used as such a penetrant.

[Formula 2: NMP (N-Methyl-2-pyrrolidone. (C ₅ H ₉ NO)]

(C ₅ H ₉ NO)

Swelling agents increase the volume of the coating loosened by the penetrant. It is preferable to use 2,2,4-trimethyl-1,3-pentanediol isobutylate (2,2,4-trimethyl-1,3-pentanediol isobutylate) as such swelling agent.

The release activator promotes (activates) the release of the coating so that the volume increased coating by the swelling agent can be peeled off smoothly and separated from the closed communication line. Wax may be used as the release activator, but in consideration of collecting and recycling the release activator after the waste communication line treatment process, it is more preferable to use dimethylsiloxy acid oil (see Formula 3).

[Formula 3: Dimethyl siloxy acid oil]

This coating release agent is 2,2,4-trimethyl-1,3-pentanediol isobutylate (swelling agent) and NMP (N-Methyl-2) as a penetrating agent. -pyrrolidone) is mixed at a weight ratio of 1: 0.001 to 1: 0.1 and swelling agent 2,2,4-trimethyl-1,3-pentanediol isobutylate (2,2,4-Trimethyl-1,3-pentandiol isobutylrate ) And a dimethylsiloxy acid oil, which is a release activator, may be prepared by adding and mixing the dimethylsiloxy acid oil so that the weight ratio is 1: 0.001 to 1: 0.05, and the swelling agent 2,2,4-trimethyl-1,3 It is preferable to prepare a coating release agent by mixing glycerin such that the weight ratio of pentanediol isobutylate (2,2,4-Trimethyl-1,3-pentandiol isobutylrate) and glycerin is 1: 0.001 to 1: 0.05.

Such a coating release agent has the advantage of ensuring safety because it can effectively peel off the coating without using a highly toxic raw material such as toluene, xylene, benzene. In addition, since the boiling point is more than 180 degrees Celsius, it is lower than the temperature during the peeling process to be described later, there is a low risk of explosion and there is an advantage that the environmental pollution due to volatilization is suppressed.

1 is a flow chart schematically showing a method for treating a waste communication line impregnated with jelly according to an embodiment of the present invention.

Referring to Figure 1 is a jelly-impregnated waste communication processing method according to an embodiment of the present invention comprises a jelly dissolution step (S110) and waste communication presumption step (S120) and preferably a peeling step (S210) ), And further comprising a conductor collection step (S220) and a polyethylene collection step (S230).

In the jelly dissolving step (S110), by dissolving the jelly impregnated in the waste communication line by inputting a waste communication line impregnated with jelly dissolution and jelly (含浸) in the reaction tank.

In the reactor, a jelly communication agent as described above and a closed communication line impregnated with jelly as shown in the photograph of FIG. 2 are introduced. Here, the reaction tank is preferably able to move repeatedly up and down so that the reaction in the reaction tank can be made smoothly. And it is preferable that the basket is equipped with a basket so that the jelly-free communication line can be easily taken out of the reactor.

The closed communication line impregnated with jelly is placed in a basket provided in the reaction vessel and soaked in the jelly dissolving agent in the reaction vessel. For example, the jelly solubilizer and the jelly-impregnated closed communication line are introduced into the reactor so that the weight ratio of the jelly solubilizer and the jelly-impregnated waste communication line is 1: 1.

After dissolving the jelly dissolving agent and the jelly-impregnated waste communication line, the basket containing the reaction vessel or the waste communication line is operated up and down at room temperature for a predetermined time (for example, 10 to 60 minutes). While the closed communication line in the reactor moves up and down, the jelly is dissolved as a jelly dissolving agent from the closed communication line in which the jelly is impregnated.

Next, the waste communication preliminary step (S120) is a step of collecting the waste communication line that is removed by dissolving the jelly in the jelly dissolving step (S110) as a jelly dissolving agent from the reaction tank.

After the jelly is dissolved in the jelly dissolving agent, the jelly dissolving agent is removed from the reaction tank and collected in a predetermined storage tank.

Then, the jelly is removed from the waste communication line to remove the jelly dissolved in the closed communication line for 2 to 60 minutes under the air pressure conditions of 2 to 20kg / ㎠. And more preferably in order to remove the residual jelly solubilizer by vacuum decompression to 700 to 100 Torr purified for 1 to 30 minutes to collect the waste communication line is removed jelly (Fig. 3).

Thus, the closed communication line in which the jelly is removed is shown in FIG.

Meanwhile, the emulsion type jelly dissolving agent containing the jelly removed from the closed communication line may be recovered to a storage tank, and then fractionated and distilled at a temperature of 90 ° C. to 160 ° C. for a predetermined time in a distiller to separate gasoline and water for reuse. have.

The jelly can be removed from the jelly-impregnated lung communication line through the jelly dissolution step (S110) and the waste communication presumption step (S120) as described above.

Next, through the peeling step (S210), conductor collection step (S220) and polyethylene collection step (S230) to process the waste communication line is removed jelly.

In the peeling step (S210), the coating of the waste communication line is peeled off using the coating release agent as described above in the reaction tank. That is, through the jelly dissolving step (S110) and the waste communication presumption step (S120), the waste communication line without jelly or the waste communication line without jelly is immersed in the coating release agent in the reaction tank and the coating is peeled off.

After the coating release agent as described above is put into the reaction vessel, a closed communication line in which jelly is removed as shown in FIG. 3 is introduced into the reaction vessel. Here, the reaction tank is preferably able to repeatedly move the closed communication line up and down so that the reaction in the reaction tank can be made smoothly. The reactor is preferably equipped with a basket so that the conductors included in the closed communication line can be easily taken out of the reactor.

Put the jelly-free waste communication line into the basket provided and soak in the coating release agent in the reactor. For example, the closed communication line from which the coating release agent and the jelly are removed is introduced into the reaction tank so that the weight ratio of the coated release agent and the jelly removed the communication line is 1: 0.1 to 1: 1.

Here, the closed communication line is shaken up and down while swelling the covering of the closed communication line for a predetermined time (for example, 10 to 60 minutes) at a temperature of 90 to 140 ° C. As the closed communication line moves up and down, the sheathing force of the closed communication line and the swelled sheath (polyethylene) are separated from the conductor such as copper.

Next, the conductor of the closed communication line in which the coating is peeled off in the above-described peeling step (S210) in the conductor collecting step (S220) is collected from the reactor.

When the coating of the closed communication line is sufficiently peeled in the peeling step (S210), the basket is taken out of the reactor. Here, since the coating of the closed communication line is peeled off and included in the coating release agent, a conductor such as copper remains in the basket as shown in FIG. 4.

Next, in the polyethylene collection step (S230), the coating of the waste communication line is peeled off in the stripping step (S210) to collect the polyethylene remaining in the reactor.

The polyethylene aggregate can be collected by filtration in a reactor. In other words, the polyethylene swelled and separated in a particulate state by the coating release agent is chemically resistant, so that it is not dissolved in the coating release agent and is formed as a polyethylene aggregate as shown in FIG. 5 by cohesion between particles and remains in the reaction tank. Therefore, after the peeling step (S210) can be easily obtained by filtering the coating release agent polyethylene aggregate.

As described above, the jelly may be removed from the closed communication line impregnated with jelly, and the conductor and polyethylene such as copper may be collected. In addition, the conductor and the polyethylene may be collected through the peeled communication line without the impregnation jelly (S210), the conductor collection step (S220) and the polyethylene collection step (S230).

On the other hand, when the closed communication line is a composite wire of polyvinyl chloride (PVC) and polyethylene (PE) may be made of a polyvinyl chloride collection step (S240) as follows.

In the polyvinyl chloride collection step (S240), the polyvinyl chloride is collected by adding a flocculant into the reaction tank in which polyethylene is collected in the polyethylene collection step (S230).

After the polyethylene is collected in the polyethylene collection step (S230), polyvinyl chloride is dissolved in the coating release agent in the reaction tank and distributed in the liquid phase as fine particles. In order to collect this, polyvinyl chloride is aggregated by adding a flocculant and then collected.

It is preferable to use ethanol as the flocculant for flocculating the polyvinyl chloride. The addition of ethanol causes the polyvinyl chloride to agglomerate and the agglomerated polyvinyl chloride can be collected using a filter network.

Ethanol added as a flocculant is added so that the weight ratio with the coating release agent is 1: 0.7 to 1: 1.

After collecting the polyvinyl chloride in the polyvinyl chloride collection step (S240), the mixed solution of the coating release agent and the flocculant remains in the reaction tank. In order to recycle this, it may further include a recycling step (S250).

The recycling step (S250) is a step of separating the coating release agent and the flocculant from the remaining balance (mixture) after the polyvinyl chloride is collected in the polyvinyl chloride collection step (S240).

Separation of the coating release agent and flocculation is carried out by fractional distillation using boiling point difference. The flocculant and the coating release agent separated in this way can be recycled again, which is environmentally friendly and economical.

As described above, a specific embodiment of the method for processing a closed communication line according to the present invention will be briefly described.

20 g of polysorbate 20 was mixed with 1000 g of water (tap water) for 5 minutes to prepare a jelly dissolving agent for dissolving the jelly of the closed communication line impregnated with jelly. And 500g of gasoline (Gasoline / specific gravity 0.63 ~ 0.76 / boiling point 30 ~ 150 ℃) was added to prepare a jelly emulsion emulsion under the pressure of 4000psi using a homogenizer (Homogenizer).

NMP (N-Methyl to 2,2,4-trimethyl-1,3-pentanediol isobutylate (2,2,4-Trimethyl-1,3-pentanediol isobutylate / boiling point 180 ℃) 1000g to prepare a coating -2-pyrrolidone / boiling point: 202-204 ° C) 10g and dimethyl siloxane oil (boiling point: 180 ℃ viscosity 50cst) 10g, 1000g glycerin and 20g polysorbate was mixed to prepare a coating release agent.

In order to remove the jelly impregnated in the closed communication line, 1000g of jelly dissolving agent was put in the reaction tank, 500g of the closed communication line impregnated with jelly was put in the basket provided in the first reaction vessel, and the upper cap of the first reaction vessel was sealed and 30 at room temperature. The jelly was dissolved in the jelly dissolving agent by shaking the closed communication line up and down for a minute.

The jelly dissolving agent containing the melt | dissolved jelly from the closed communication line was collected by the storage tank, and it was redissolved (rinsed) for 10 minutes with the emulsion type jelly dissolving agent. Then, the residual jelly dissolved in the closed communication line was removed for 10 minutes at 7kg / cm 2 air pressure and purified for 10 minutes by vacuum decompression of 500 Torr to obtain a well-removed closed communication line.

Next, 1000g of the coating release agent was filled in the second reaction vessel, and 500g of the waste communication line from which the jelly was removed was put in a basket provided in the second reaction vessel, and the upper cap of the second reaction vessel was sealed. The coating (polyethylene) was peeled off with shaking. The basket was then taken out to recover copper as shown in FIG. 4.

Then, the solution in the second reactor was filtered to collect polyethylene.

The recovered copper was placed in a refining bath and refined to remove the coating release agent remaining in the recovered copper for 10 minutes under a vacuum pressure of 500 Torr to obtain 392 g of pure copper.

Polyethylene recovered in the second reactor was also purified by a coating release agent for 60 minutes under a vacuum pressure of 500 Torr under a temperature of 100 ℃ to obtain 83g of pure polyethylene.

Meanwhile, the emulsion type jelly dissolving agent containing the jelly removed from the closed communication line was recovered to a storage tank, and distilled twice in a distiller under a condition of 60 minutes at 100 ° C. and 60 minutes at 150 ° C., and a mixture of gasoline and water was used. Water was separated and recovered as a reusable raw material.

Second Embodiment Treatment of Polyvinyl Chloride-Polyethylene Composite Waste Communication Line

The top cap of the reactor was opened, 1000 g of the coating release agent was added, and 500 g of polyvinyl chloride (PVC) -polyethylene (PE) composite line was put in a basket provided in the reactor. After sealing the upper cap of the reactor, the coating of the composite line was peeled off while shaking the polyvinyl chloride-polyethylene composite line up and down for 40 minutes at a temperature of 128 ° C.

After peeling the coating of the polyvinyl chloride-polyethylene composite line, the upper cap of the reaction tank was opened, and the basket of the reaction tank was taken out of the reaction tank to recover copper first.

Then, the recovered copper was put in a refining bath and purified for 10 minutes under a vacuum pressure of 500 Torr to obtain 343 g.

Next, the remaining liquid in the reactor was filtered by using a 100-neck wire cloth to recover the polyethylene aggregate in the reactor. The recovered polyethylene was once washed with a coating release agent and purified for 60 minutes at a vacuum pressure of 500 Torr under a temperature of 120 ℃. Thus 87 g of polyethylene was obtained.

After recovering the polyethylene aggregate, 1000 g of ethanol (Ethyl alcohol / C2H5OH boiling point: 78 ° C) was added to the remaining liquid in the reaction tank to agglomerate the polyvinyl chloride, and then the polyvinyl chloride aggregate was aggregated using a 100-neck filter network. Recovered. The recovered polyvinyl chloride aggregates were purified for 60 minutes under reduced pressure of 500 Torr at a temperature of 100 ℃. Thus, 68 g of polyvinyl chloride aggregates were obtained.

Then, the polyvinyl chloride aggregate was recovered, and the remaining liquid was put in a still, and the coagulant and the coating release agent were separated by distilling ethanol for 3 hours at a temperature of 80 ° C. The ethanol and the stripping agent separated and collected through fractional distillation were recovered as reusable raw materials.

As described above, according to the method for treating a waste communication line according to the present invention, the conductor and polyethylene of the communication line can be effectively separated and collected from the waste communication line impregnated with jelly.

Jelly dissolving agent is emulsified by mixing petroleum solvent with water, which improves fire stability and lowers volatile property of jelly dissolving agent. There are advantages to it.

In addition, the coating release agent has the advantage of ensuring safety because it can effectively peel off the coating without using a highly toxic raw material such as toluene, xylene, benzene. In addition, since the boiling point is more than 180 degrees Celsius, it is lower than the temperature during the peeling process to be described later, there is a low risk of explosion and there is an advantage that the environmental pollution due to volatilization is suppressed.

Conductors such as polyvinyl chloride, polyethylene, and copper can be separately collected from various waste wires, which are difficult to select because polyethylene and polyvinyl chloride are mixed when the polyvinyl chloride and polyethylene are laminated and laminated. have.

As described above, the detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings, but since the above-described embodiments have only been described with reference to the preferred examples of the present invention, the present invention has been described above. It should not be understood to be limited only to the embodiments, and the scope of the present invention should be understood by the claims and equivalent concepts described below.

The present invention can be used in the industrial field of recycling waste communication lines.

Claims

Penetrant to relax the sheath of the closed communication line;

Swelling agent for swelling the coating loosened by the penetrant; And

And a release activator for activating release of the coating so that smooth peeling of the coating swollen by the swelling agent can be achieved.

Coating release agent for the treatment of waste communication lines.
The method of claim 1,

The coating release agent further comprises a glycerin or glycol (glycol)

Coating release agent for the treatment of waste communication lines.
Peeling step of peeling the coating of the waste communication line by injecting the coating stripping agent for treating the waste communication line according to claim 1 or 2 and the waste communication line in the reaction tank;

A conductor collection step of collecting the conductor of the closed communication line from which the sheath has been peeled off in the stripping step from the reactor; And

A polyethylene collection step of collecting polyethylene from the coating and the coating release agent peeled off in the peeling step; Characterized in that it comprises

How to handle closed telecommunication lines.
The method of claim 3, wherein

A polyvinyl chloride collection step of collecting polyvinyl chloride (PVC) by adding a flocculant to a reaction tank in which polyethylene is collected in the polyethylene collection step; Characterized in that it further comprises

How to handle closed telecommunication lines.
The method of claim 4, wherein

A recycling step of separating and collecting the flocculant and the coating release agent from the residue remaining in the reactor after the polyvinyl chloride is collected in the polyvinyl chloride collection step; Characterized in that it further comprises

How to handle closed telecommunication lines.
The method of claim 3, wherein

A jelly dissolving step of dissolving the jelly-impregnated jelly and the jelly-impregnated jelly in a reactor by introducing a jelly-impregnated and jelly-impregnated waste communication line; And

A waste communication preliminary step of collecting the waste communication line from which the jelly is dissolved and removed in the jelly dissolving step from the reactor; More,

The closed communication line in the peeling step is characterized in that the closed communication line jelly is removed in the jelly melting step

How to handle closed telecommunication lines.
The method of claim 6,

A petroleum solvent capable of dissolving jelly in a closed communication line impregnated with jelly;

Water to suppress volatility of the petroleum solvent; And

An emulsifier having amphipathy to the petroleum solvent and the water to assist mixing of the petroleum solvent and the water; Characterized in that it comprises

How to handle closed telecommunication lines.
A petroleum solvent capable of dissolving jelly in a closed communication line impregnated with jelly;

Water to suppress volatility of the petroleum solvent; And

An emulsifier having amphipathy to the petroleum solvent and the water to assist mixing of the petroleum solvent and the water; Characterized in that it comprises

Jelly dissolving agent for treatment of closed telecommunication lines.
A jelly dissolving step of dissolving the jelly dissolved in the waste communication line by injecting the jelly dissolving agent and the jelly-impregnated waste communication line according to claim 8 into the reactor; And

A waste communication preliminary step of collecting the waste communication line from which the jelly is dissolved and removed in the jelly dissolving step from the reactor; Characterized in that it comprises

How to handle closed telecommunication lines.
The method according to claim 6 or 9,

A jelly dissolving step of separating the components of the jelly dissolving agent from the jelly dissolving agent in which the jelly is dissolved; Characterized in that it further comprises

How to handle closed telecommunication lines.