JPH08337677A - Method for treating waste polyvinyl chloride and apparatus therefor - Google Patents

Abstract

PURPOSE: To decompose, melt, and contract the resin component of a waste polyvinyl chloride to increase the efficiency of waste treatment by filling a treating tank contg. the waste polyvinyl choride sealed therein with a vapor generated by heating methylene chloride and water. CONSTITUTION: A waste polyvinyl chloride W to be treated, which may be in the state of mudded or thinly cut, is placed on a waste stand 26, which is then put into a treating tank T, and the tank is tightly sealed with a lid 22; the inside of the tank is pressurized; a mixture of methylene chloride and water is put into the tank T in such an amt. that a heating and cooling pipe 20 installed on the inside bottom of the tank T is immersed in the mixture; steam at about one hundred and several tens deg.C is supplied from a boiler to the pipe 20 to evaporate both methylene chlride, havng a b.p. of 40 deg.C, and water to cause them to penetrate into the waste polyvinyl chloride; after such treatment for about 24hr, a cooling water is caused to flow through the pipe 20, the tank T is depressurized, and methylene chloride and water are sucked, cooled, and recovered; and the residual solid is taken out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment method and apparatus for discarding waste polyvinyl chloride film or the like used by a large amount of farmers in greenhouse cultivation, mulching cultivation, etc. after use.

[0002]

2. Description of the Related Art Conventionally, waste polyvinyl chloride was directly discharged as general waste on the day of waste collection and incinerated at a waste incinerator. However, since the amount of discarded PVC is large, the property is different from general household waste, it is commercial waste, and the amount of heat generated when incinerated is large, and chlorine gas is generated during incineration, Since it promotes damage to the incinerator and causes smoke pollution, there is a limit to the cost of treating waste PVC as a public project, and public bodies must dispose of it at the expense of the waste generating side. I came to ask for it.

[0003]

SUMMARY OF THE INVENTION The present invention is possible as much as possible when it becomes necessary to incinerate or reclaim harmful waste such as waste polyvinyl chloride at the burden of the generation side. The present invention provides a method and an apparatus for treating waste polyvinyl chloride, which melts and shrinks to treat solid matter at a low cost until pollution-free.

The present invention uses the strong oxidizing power of chlorine ions (Cl ⁻ ) and methylene free radicals (—CH ₂ —) generated from a mixture of methylene chloride vapor and water vapor.
The waste polyvinyl chloride is melted and shrunk before being incinerated and taken out, which is used as a solid or liquid fuel for the incinerator. Also, when a large amount of polyvinyl chloride is no longer needed in greenhouse cultivation or mulch film cultivation, it is dissolved and shrunk to transform it into a small volume of solid matter, and the chlorine content It is intended to eliminate chlorine gas during subsequent incineration. When waste PVC is incinerated, high heat and toxic gas are generated in the refuse incinerator, which adversely affects the life of the incinerator. In addition, it takes a long time to completely incinerate, which causes a decrease in operating time of the incinerator. The present invention solves such a problem of the conventional technique.

In order to solve the above-mentioned problems of the prior art, the present invention provides a methylene chloride solution and water generated at a low temperature,
Alternatively, the vapor of the mixed liquid added with a surfactant is permeated into the waste polyvinyl chloride W to decompose and melt and shrink the synthetic resin component, thereby enabling efficient waste treatment and reducing the cost. It is a thing.

[0006]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. In the first aspect of the present invention, a methylene chloride solution and water are used as a mixed liquid, the mixed liquid is heated to generate methylene chloride vapor and steam, and the mixed vapor is filled in a treatment tank in which waste polyvinyl chloride W is sealed. , A method and apparatus for treating waste polyvinyl chloride that melts and shrinks waste polyvinyl chloride W.

A second aspect of the present invention is a method and a device for treating waste polyvinyl chloride in which the heating temperature of the mixed solution is in the range of 50 to 150 ° C.

According to a third aspect of the present invention, there is provided a method and apparatus for treating waste polyvinyl chloride in which the weight ratio of methylene chloride solution and water is approximately 1: 1.

In a fourth aspect of the present invention, a methylene chloride solution, water and a surfactant liquid are mixed into a mixed liquid, and the mixed liquid is heated to generate methylene chloride vapor, steam and surfactant vapor, A method and an apparatus for treating waste polyvinyl chloride in which vapor is filled into a treatment tank in which the waste polyvinyl chloride W is sealed and permeated to melt and shrink the waste polyvinyl chloride W.

A fifth aspect of the present invention is the method and apparatus for treating waste polyvinyl chloride in which the weight ratio of methylene chloride solution, water and surfactant solution is approximately 5: 4.5: 0.5.

[0011]

[Operation] Next, the operation will be described. Methylenechlora of the present invention
Id steam and steam, or methylene chloride steam and water steam
The vapor and the surfactant vapor are not contained in the waste PVC W.
Chloride ions (Cl^-),
Methylene free radical (-CH ₂−) Is a vacuum in the processing tank T
To make it work longer and stronger than usual.
The long chain hydrocarbon groups that make up the synthetic resin.
Cut off the child, convert it to carbohydrates, alcohol, or water and dissolve
Or it decomposes.

In addition, in the method and apparatus for treating waste polyvinyl chloride of the present invention, the surfactant vapor is mixed with the methylene chloride solution and water to mix the surfactant liquid, whereby the chlorine content after melting is changed. It facilitates the separation and melting of the. Also, by mixing a surfactant,
Since the steam can be generated at a low temperature, the treatment temperature can be lowered, so that the waste polyvinyl chloride W is not roasted.

[0013]

EXAMPLES Next, examples will be described. Methylene chloride has a molecular weight of 84.93 represented by the chemical formula CH ₂ Cl _2.
Is the substance of. The chemical name is methylene chloride, and in addition to methylene chloride as a general name, dichloromethane,
It may be referred to as methylene dichloride. Boiling point is 40.
At 4 ° C, the melting point is-96.8 ° C.

The surfactants are classified into anionic surfactants, cationic surfactants, nonionic surfactants and amphoteric surfactants. Examples of the anionic surfactant include sodium alkylsulfate, sodium amidosulfate, sodium secondary alkylsulfate, sodium alkylsulfonate, sodium amidosulfonate, sodium alkylallylsulfonate, sodium alkylnaphthalenesulfonate and the like. Examples of the cationic surfactant include amine acetate, alkyltrimethylammonium chloride, dialkylmethylammonium chloride, alkylpyridinium halide, alkyldimethylbenzylammonium chloride and the like.

As the amphoteric surfactant, carboxylic acid type,
There are sulfonic acid type, sulfuric acid ester type and the like. Examples of the nonionic surfactant include polyoxyethylene alkylphenol, polyoxyethylene fatty alcohol, polyoxyethylene fatty acid, polyoxyethylene acid amide, polyoxyethylene fatty amine, and polypropylene glycol. In the present invention, when the alkalinity becomes strong,
Since Cl ₂ is likely to be generated, it is necessary to avoid this, and polyoxyethylene alkylphenol and polyoxyethylene fatty alcohol, which are alcohol-based nonionic surfactants that are relatively stable against acids and alkalis. However, it is effective in this respect. However, all surfactants are effective for decomposing and dissolving the synthetic resin component.

FIG. 1 is a basic structural drawing of the method and apparatus for treating waste polyvinyl chloride according to the present invention, and FIG. 2 is a drawing showing the steps and procedures of the method and apparatus for treating discarded polyvinyl chloride by opening and closing a valve mechanism, FIG. 3 is a side view of the processing tank T, the lid 22, and the processed material mounting table 26, and FIG. 4 is a view showing the waste polyvinyl chloride W mounted on the processed material mounting table 26 and sealed in the processing tank T. 4 is a side view of the same state as FIG. 4, FIG. 5 is a side view of the state in which the waste polyvinyl chloride W after processing is taken out from the processing tank T, and FIG. FIG. 8 is a drawing showing a chlorine content state before treatment and a chlorine content state after treatment according to the present invention.

In FIG. 3, FIG. 4, FIG. 5, FIG. 6 and FIG.
The configurations of the processing tank T, the lid 22, and the processed material mounting table 26 will be described. That is, the processing tank T constitutes a pressure vessel,
In the method and apparatus for treating waste polyvinyl chloride according to the present invention, a degassing vacuum state of 50 Torr is set in the degassing operation, and 200 Torr is collected at the time of methylene chloride vapor recovery.
Since the vacuum is r, the pressure vessel is configured to withstand this. Further, a lid 22 is provided on the front surface, and the lid 22 is configured integrally with the processed object placing table 26. The processed material mounting table 26 moves on a moving rail 25 provided inside the processing tank T, and the lid 22 is a portion of a moving rail 24 below the lid supporting portion 23, both of which are integrally formed. It is movable.

The waste polyvinyl chloride W to be treated is cut into pieces with the soil and cut into small pieces by the cutting device on the work piece mounting table 26 that is integrally drawn out and inserted into the lid 22. The one in the state of being changed is placed as it is. By cutting the waste polyvinyl chloride W with a cutting device, chlorine ions (Cl ⁻ ) and methylene free radicals (—CH ₂ —) easily reach the entire waste polyvinyl chloride W. The portion of the processing object mounting table 26 is attached to the processing tank T.
The lid 22 and the processing tank T are hermetically fixed and pressure is applied in a state where the lid 22 and the processing tank T are inserted. A heating / cooling pipe 20 is arranged at the bottom inside the processing tank T, and in the case of heating, steam of several tens of degrees is supplied from the boiler B. In the case of cooling, cooling water in the cooling water tank 18 is supplied. The mixed solution of methylene chloride and water may be directly injected into the inside of the processing tank T, or a mixed vapor state may be provided in the processing tank T in the spare tank portion.
Can be supplied to. In the embodiment of FIG.
The liquid mixture is supplied to the inside of the processing tank T.

Then, in the state of the mixed solution, steam of 100 to several tens of degrees is supplied from the boiler B to the heating / cooling pipe 20 in a state of injecting the mixed solution to such an extent that the heating / cooling pipe 20 is immersed. Not only methylene chloride having a boiling point of 40 ° C., but also water becomes steam. The simultaneous supply of the water vapor and the methylene chloride vapor promotes penetration of the waste polyvinyl chloride W by the water vapor. In the present invention, the mixed solution of methylene chloride, water, and the surfactant reaches only below the treated object mounting table 26 even if the liquid level is the maximum, as shown in FIGS. 5 and 7.
The waste polyvinyl chloride W is never immersed in the liquid. To the end, the vapor of the mixed liquid is absorbed by the waste polyvinyl chloride W for processing. 6 and 7 show the taken-out state after the treatment, the waste polyvinyl chloride W, which had been placed in large amounts on the treated-material mounting table 26, melts and shrinks, and the treated-material is placed. The surface of the table 26 is contracted as a solid. This may be separated and burned as it is as a fuel in a burner or an incinerator, or it may be thermally decomposed and distilled / fractionated to be converted into a liquid petroleum fuel.

Next, referring to FIG. 1, the basic constitution of the method and apparatus for treating waste polyvinyl chloride of the present invention will be described. The equipment mainly comprises a processing tank T and a mixed liquid tank 14, and a mixed liquid in which methylene chloride, water and a surfactant are mixed is put into the mixed liquid tank 14. The boiler B is for vaporizing the mixed liquid as described above, and the compressor C is for applying pressure when returning the mixed liquid inside the processing tank T to the mixed liquid tank 14 after the processing is completed.

The vacuum pump P is for sucking the methylene chloride vapor remaining in the processing tank T and the waste polyvinyl chloride W after the mixed solution is pushed out. And the sucked methylene chloride vapor is
Since it cannot be discharged to the atmosphere, it is cooled and liquefied in the condenser 16 and returned to the mixed liquid tank 14 from the portion of the condenser pipe 21. The chiller 15 cools the cooling water inside the condenser 16.
Further, a filter 19 is provided to filter impurities such as dust in the mixed solution extruded from the processing tank T by the compressor C. The cooling water tank 17 is a pan for cooling water used for liquefying the mixed liquid vapor.

An electromagnetic valve is arranged in each part. The electromagnetic valve is configured to be opened and closed at regular time intervals by an automatic control device, and is a process step such as "processing object degassing", "mixed liquid feeding", "processing", "mixed liquid cooling", "Mixed liquid tank return", "Mixed liquid vapor recovery",
As shown in FIG. 2, the opening / closing operation is automatically performed in the order of “collection of mixed liquid in condenser”. At the same time, compressor C
The boiler B, the vacuum pump P, and the chiller 15 are automatically stopped. Overall, in the examples, the weight ratio of methylene chloride: water: surfactant was about 5: 4.5: 0.5, and the temperature in the processing tank T was about 9: 9.
0 degree is preferable. Further, it is desirable that one processing cycle is set to 24 hours and then a cooling time is set to 24 hours.

Next, FIG. 2 shows a method of treating waste polyvinyl chloride and the state of the electromagnetic valve in each step of the apparatus.
First, the vacuum pump P is driven in the process of "degassing the processed material". Then, the electromagnetic valve 1 of the circuit connecting the vacuum pump P and the capacitor 16 opens, and the capacitor 16
The electromagnetic valve 3 that communicates with the processing tank T is also opened. All other solenoid valves are closed. As a result, the inside of the processing tank T becomes a vacuum of about 50 Torr,
Air is drawn from between the pieces of waste PVC W.

Next, in the "mixed liquid feeding" step, the electromagnetic valve 4 that connects the processing tank T and the mixed liquid tank 14 is opened, and the other electromagnetic valves are closed. As a result, the mixed solution tank 14 and the processing tank T are arranged at substantially the same level, so that the mixed solution is treated so that the mixed solution tank 14 and the processing tank T are at the same level.
Move in.

Next, in the process of "treatment", the electromagnetic valve 7 between the boiler B and the processing tank T and the electromagnetic valve 9 connecting the drain from the processing tank T to the drain are opened and the other electromagnetic valves are closed. It As a result, high-heat steam from the boiler B is supplied to the heating / cooling pipe 20 in the treatment tank T, and the mixed liquid in the treatment tank T becomes methylene chloride vapor, water vapor, and surfactant vapor, and waste poly Penetrates into vinyl chloride W. This "treatment" step is performed for about 8 to 24 hours. This processing time varies depending on the processing temperature and the state of waste polyvinyl chloride. 1% chlorine content
A processing time of 24 hours is desirable to reduce

Next, the process of "mixed liquid cooling" will be described. In this case, the electromagnetic valve 8 that connects the cooling water tank 18 and the processing tank T, the processing tank T, and the cooling water tank 17 are connected.
The electromagnetic valve 10 that communicates with is opened. The other solenoid valve is closed. As a result, the cooling water passes through the heating / cooling pipe 20 and the inside of the processing tank T becomes 40 ° C. or lower, which is the boiling point of methylene chloride, so that both methylene chloride and steam return to the chemical liquid.

Next, the process of "returning the mixed liquid tank" will be described. In this case, the electromagnetic valve 2 is opened to release the air in the processing tank T, the electromagnetic valve 5 under the processing tank T and the electromagnetic valve 6 that connects the compressor C and the processing tank T are opened, and the compressor C is opened. Driven. In addition, the electromagnetic valve 12 between the filter 19 and the mixed liquid tank 14
And an electromagnetic valve 13 for communicating the mixed liquid tank 14 with the atmosphere
Opens. As a result, a certain amount of pressure is applied to the processing tank T, so that the liquefied mixed liquid is pushed back into the mixed liquid tank 14.

Next, the process of "collection of vapor mixture in tank" will be described. In this case, the vacuum pump P is driven. Then, the electromagnetic valve 1 that connects the vacuum pump P and the capacitor 16 and the electromagnetic valve 3 that connects the capacitor 16 and the processing tank T are opened. The other solenoid valve is closed. In this state, the vacuum pump P collects the vapor of methylene chloride that has penetrated into the processing tank T and the waste polyvinyl chloride W. The vacuum degree at this time is 200T
Lower to about orr.

Next, in the process of "collecting the mixed liquid inside the condenser", the electromagnetic valve 2 communicating with the atmosphere and the electromagnetic valve 11 communicating with the condenser pipe 21 and the mixed solution tank 14 are opened. As a result, the mixed liquid such as methylene chloride accumulated inside the condenser pipe 21 of the condenser 16 can be collected in the mixed liquid tank 14.
Each of these steps is completed in 24 hours. After that, the methylene chloride gas, the water vapor and the surfactant gas are cooled and returned to the original liquid, and the molten waste polyvinyl chloride is cooled and left standing for 24 hours in order to be solidified.

Next, referring to FIGS. 5 and 7, a sectional view of the inside of the processing tank T in the processing state will be described. A heating / cooling pipe 20 is arranged below the inside of the processing tank T, and a processed material placing table 26 is movably arranged above the heating / cooling pipe 20. The processed material placing table 26
The waste polyvinyl chloride W is placed on top of it.
The liquid level of the mixed liquid of water Wa, the surfactant liquid S, and the methylene chloride solution Me is higher than that of the heating / cooling pipe 20, but the waste polyvinyl chloride W on the treated object mounting table 26 is immersed in the liquid. It is injected so that the liquid level will not be reached.

Since the specific gravity of the water Wa is 1.00 and the specific gravity of the surfactant liquid S is 1.04, the liquid levels are almost the same, and the surfactant liquid S dissolves in the water Wa and thus becomes integral. As shown in FIGS. 5 and 7, a liquid layer of water Wa + surfactant liquid S is formed. On the other hand, the methylene chloride solution Me has a specific gravity of 1.33 and does not dissolve in water Wa, and therefore forms a layer below the layer of water Wa + surfactant liquid S. Then, when steam heated to 160 ° C. is supplied to the heating / cooling pipe 20 arranged in the layer of water Wa + surfactant liquid S, the temperature around the heating / cooling pipe 20 rises. The heating / cooling pipe 20 is arranged in a layer of water Wa + surfactant liquid S, and the temperature of the portion rises first.

When the temperature of the heating / cooling pipe 20 gradually rises and reaches about 40 ° C., the methylene chloride solution Me
Reaches the boiling point and changes to methylene chloride vapor, water Wa
+ Passes through the layer of the surfactant liquid S as bubbles, reaches the waste polyvinyl chloride W, and penetrates into the waste polyvinyl chloride W. In normal waste PVC W,
It is heated to about 50 ° C or higher (preferably 90 ° C), and treated so that methylene chloride vapor passes through the water Wa and the surfactant liquid S and reaches the waste polyvinyl chloride W. To continue.

In the case of waste polyvinyl chloride W that is difficult to process, the temperature of the mixed solution is raised to about 100 ° C. and the water Wa and the surfactant solution S are also processed as steam.
Then, while the methylene chloride Me passes through the water Wa and the surfactant liquid S, Cl ₂ (chlorine gas) generated from methylene chloride is absorbed in the water Wa to suppress generation of Cl ₂ which adversely affects the treatment. Of. In addition, the methylene chloride vapor penetrates into the waste polyvinyl chloride W with the surfactant liquid S added thereto. This makes it possible to improve the disconnection of the molten resin flowing out.

As described above, by heating the water Wa, the surfactant solution S, and the methylene chloride solution Me as a mixed solution through the heating / cooling pipe 20, the vapor of the methylene chloride Me becomes surface active with the water Wa. After passing through the chemical liquid S, it is evaporated in the processing tank T, so that Cl ₂ is reduced. The vapor of the methylene chloride penetrates into the waste polyvinyl chloride W and oxidizes the waste polyvinyl chloride W. Further, since the surfactant liquid S enters the perforations in a mixed state, when the waste polyvinyl chloride W is dissolved, the degreasing is good, and a large amount of methylene chloride vapor can be generated at a low temperature. It is not necessary to raise the temperature inside the processing tank T to perform processing.

Further, before the permeation of methylene chloride vapor, water vapor and surfactant vapor, the waste polyvinyl chloride W is degassed in the vacuumed treatment tank. Since the vapor of methylene chloride can be permeated in a state where the internal air is removed, it can be permeated further to the inside.

The waste polyvinyl chloride W is oxidized and melted by the chlorine ions (Cl ⁻ ) and methylene free radicals (—CH ₂ —) generated from the methylene chloride vapor and water vapor of the present invention, and is melted, and the treated product mounting table 26 is used. To drop from. The molten waste polyvinyl chloride W has changed to a solid matter when the processed material placing table 26 is taken out, but since it melts and shrinks, several tens of the waste polyvinyl chloride W when it is initially charged. It is one-third the volume.
This solid matter is put into an incinerator or a burner as a solid fuel.

The waste polyvinyl chloride W melted and shrunk according to the present invention can be taken out separately, pyrolyzed, and only the petroleum component can be easily taken out by the refining separator. By burning this as the same fuel as kerosene, It can be provided as a raw material for garbage incinerators, garbage incineration power generation, and garbage incineration heating.

Further, as shown in the results of qualitative analysis of all elements as shown in FIG. 8, when a chlorine-based synthetic resin film such as polyvinyl chloride is treated by the method and apparatus for treating waste polyvinyl chloride of the present invention, chlorine is eliminated. Minutes are reduced to 1/100 of that before processing. The chlorine content which is to configure the components of the waste PVC, chlorine ions (Cl ^-) and methylene free radical (-CH ₂ -) is gasified and decomposed, then converted to the hydrochloride or the like is reacted with water It is considered that this is because it is recovered in the mixed solution. Therefore, even if the treated solid or liquid treated product is burned, chlorine gas is less generated.

[0039]

Since the present invention is constructed as described above, it has the following effects. That is, since it is configured as in claim 1, it is possible to permeate methylene chloride vapor and water vapor into the waste polyvinyl chloride W to dissolve and shrink the synthetic resin component, thereby reducing the volume of the waste polyvinyl chloride W. It can be reduced to solid fuel and then burned in a burner or incinerator. By treating waste polyvinyl chloride with the treatment method and apparatus of the present invention, the chlorine content is reduced to about 10%.
It can be reduced to about 1/0. As a result, even if the solid matter after treatment is incinerated, chlorine gas is not generated and it becomes a source of pollution.

The heating temperature of the mixed solution is 50
Since the range is from ~ 150 ° C (preferably 90 ° C),
At low temperature chlorine ions (Cl ^-) and methylene free radical (-C
H ₂ −) can be generated, the heat cost of the treatment can be reduced, and the waste polyvinyl chloride W can be treated at a high temperature without being roasted.

Since the weight ratio of the methylene chloride solution and water is set to about 1: 1 as in claim 3, chlorine ions (Cl ⁻ ) and methylene free radicals (—CH ₂ —) in the optimum state are generated. Can be done.

By adding a surfactant as described in claim 4, vaporization of methylene chloride explosively progresses, and a strong oxidizing power can be obtained at a low temperature. Further, since the work of melting the decomposed and dissolved synthetic resin can be accelerated by the surfactant,
The processing time in the processing tank T can be smoothly performed.

By setting the weight ratio of methylene chloride, water and surfactant to 5: 4.5: 0.5 as in claim 5, the removal efficiency of the chlorine content can be optimized. .

[Brief description of drawings]

FIG. 1 is a basic configuration drawing of a method and an apparatus for treating waste polyvinyl chloride according to the present invention.

FIG. 2 is a drawing showing a process and a procedure of a waste polyvinyl chloride treatment method and apparatus by opening and closing a valve mechanism.

FIG. 3 is a side view of a processing tank T, a lid 22, and a processed material mounting table 26.

FIG. 4 is a side view showing a state in which the waste polyvinyl chloride W is placed on the treated object placing table 26 and sealed in the treating tank T.

FIG. 5 is a front sectional view of FIG.

FIG. 6 is a side view showing a state in which a waste polyvinyl chloride W after processing is taken out in a processing tank T.

FIG. 7 is a front sectional view of FIG.

FIG. 8 is a drawing showing a chlorine content content before treatment and a chlorine content content after treatment according to the present invention.

[Explanation of symbols]

 Me Methylene chloride solution C Compressor B Boiler T Treatment tank P Vacuum pump W Waste PVC PVC Wa water S Surfactant liquid 14 Mixture tank 15 Chiller 16 Condenser 18 Cooling water tank 21 Condenser pipe 22 Lid 26 Disposable stand

Claims (5)

[Claims] 1. A mixed solution of a methylene chloride solution and water is heated, the mixed solution is heated to generate methylene chloride vapor and water vapor, and the mixed vapor is filled in a treatment tank in which waste polyvinyl chloride W is sealed, A method and an apparatus for treating waste polyvinyl chloride, characterized by melting and shrinking waste polyvinyl chloride W. 2. The method and apparatus for treating waste polyvinyl chloride according to claim 1, wherein the heating temperature of the mixed solution is 50 to 50.
A method and an apparatus for treating waste polyvinyl chloride, characterized in that the temperature is in the range of 150 ° C. 3. The method and apparatus for treating waste polyvinyl chloride according to claim 1, wherein the weight ratio of the methylene chloride solution and water is approximately 1: 1. apparatus. 4. A methylene chloride solution, water and a surfactant liquid are mixed to form a mixed liquid, and the mixed liquid is heated to generate methylene chloride vapor, water vapor and surfactant vapor, and the mixed vapor is discarded. A method and an apparatus for treating waste polyvinyl chloride, characterized in that the waste polyvinyl chloride is melted and shrunk by filling and permeating the treatment tank in which the polyvinyl chloride W is sealed. 5. The method and apparatus for treating waste polyvinyl chloride according to claim 4, wherein the weight ratio of the methylene chloride solution, water and surfactant solution is approximately 5: 4.5: 0.5. Characteristic waste PVC treatment method and equipment.