JPH08100183A - Oil treatment apparatus for synthetic resin material and oil treatment method thereof - Google Patents

Abstract

PURPOSE: To provide the subject system improved in oil conversion processing efficiency at low cost without the need of any corrosionproofing measure by, providing an oil recovery means to recover oil traduced by irradiating a synthetic resin material with ultraviolet light, removing the chlorine-based gas generated, decomposing the resultant material. CONSTITUTION: This oil conversion processing system for a synthetic resin material S is equipped with an ultraviolet light irradiation means such as an ultraviolet laser generator capable of freely setting ultraviolet light wavelength and the wave range and having such functions as to irradiate a synthetic resin material S with ultraviolet light in a degassing chamber 5 to remove the chlorine-based gas from the resin material S, a pyrolyzing means such as a normal pressure-heating oven 13 or higher-pressure heating oven designed for pyrolyzing the degassed resin material S, and an oil recovery means to recover oil from the pyrolyzed resin material S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is applicable to, for example, discarded O
The present invention relates to an oil treatment device for selecting a synthetic resin material from an A product, a home electric appliance, etc., and then oil-treating the waste synthetic resin material, and an oil treatment method thereof.

[0002]

2. Description of the Related Art A typical synthetic resin material is polyethylene,
There are many examples such as polystyrene, polypropylene, ABS resin, vinyl chloride resin. Such synthetic resin materials are widely used from industrial products to household products, and the amount of waste is increasing along with the prevalence rate thereof.
Since the synthetic resin material is difficult to decompose naturally, the disposal method has been regarded as a problem.

However, as the awareness of environmental problems on a global scale has been raised in recent years, and the recycling technique of synthetic resin materials has been emphasized, the means for treating waste synthetic resin materials is in the process of evolving.

Above all, the waste synthetic resin material is pyrolyzed,
A device for collecting recycled oil such as light oil, kerosene, and gasoline has been developed and is drawing attention. As a means for oilification treatment of synthetic resin materials currently in practical use, melting-
There is an apparatus having a process of thermal decomposition-catalytic decomposition-condensation oil conversion. As the catalyst used in the catalyst decomposition step, a metal plate made of zeolite, Al, Ni, Cu material is used. (Publications: Fuel and Combustion Vol. 60, No. 563
However, in this type of treatment means, a waste synthetic resin material containing a chlorine (Cl) component such as a vinyl chloride resin material (hereinafter referred to as PVC) contains about 20% of the total treatment amount. The biggest drawback is that it can be processed only within a certain range.

That is, in general, PVC, which is a chlorine-based synthetic resin, is often mixed in the synthetic resin material, and the chlorine component contained therein is hydrogen chloride (HCl) gas which is a chlorine compound in the thermal decomposition process. Occurs as.

This hydrogen chloride gas not only accelerates the corrosion of the heating and melting furnace and the piping, but also may deteriorate the quality of the regenerated oil. Further, if the gas containing hydrogen chloride is released into the atmosphere as it is, it directly or indirectly affects the living environment such as acid rain and the natural environment, and it is necessary to strictly treat the waste gas.

Therefore, a means by the applicant of the present invention has been newly devised, and a part of them has been put into practice. For example, Japanese Patent Application Laid-Open No. 59-177187 discloses a method for kneading wastes in which hydrogen chloride gas generated by thermal decomposition is neutralized with an alkaline agent and a neutralizing compound is separated and removed, and an apparatus used therefor. It is disclosed.

Further, the present applicant mixed sodium hydroxide (NaOH) in a waste synthetic resin material and reacted harmful chlorine gas generated during thermal decomposition with sodium to produce harmless sodium chloride (salt: NaCl). Developed a means to do.

By this means, no harmful chlorine compounds are generated, and 30% by weight of oil can be obtained. If it is put into practical use, 70-80% excluding thermosetting resin can be used for oiling synthetic resin materials, and the demonstration plant is currently in operation. (For details, see the Mainichi Shimbun article dated March 29, 1993.) In adopting this kind of technology, in order to make chlorine gas and sodium hydroxide react efficiently, sodium hydroxide administration according to the amount of chlorine gas generated Is important, and for that purpose, a technology for quantitatively monitoring the amount of chlorine in the gas generated during the thermal decomposition of the synthetic resin material is required.

The analysis method and apparatus for the mixing amount of polyvinyl chloride resin in the mixed plastic waste in Japanese Patent Laid-Open No. 4-172248 uses a gas chromatographic analysis apparatus in consideration of corrosion resistance as a quantitative detection method of chlorine gas. The disclosed technology is disclosed.

[0011]

By the way, in order to convert harmful chlorine gas generated during thermal decomposition of a chlorine-based synthetic resin material such as PVC into harmless salt by adding sodium hydroxide, it is necessary to satisfy the following chemical formula. .

HCl + NaOH → NaCl + H ₂ O That is, the generation of water is necessarily involved in this reaction together with sodium chloride. Therefore, (1) Hydrochloric acid, which is extremely corrosive, is generated in the pyrolysis heating furnace. Therefore, corrosion of the pyrolysis heating furnace wall is unavoidable. (2) In order to promote the reaction efficiently, it is necessary to optimize the mixing amount of hydrogen chloride and sodium hydroxide and to monitor it.However, hydrogen chloride has extremely high solubility in water, so in the decomposition process It is difficult to accurately detect the amount of generated hydrogen chloride. (3) Sodium hydroxide corresponding to the amount of generated hydrogen chloride is required, which causes new problems of the use cost of sodium hydroxide and the treatment cost of the generated sodium chloride.

In view of the above problems, there is a demand for the adoption of a completely new means for degassing chlorine-based gas such as HCl and Cl ₂ contained in the chlorine-based synthetic resin material.

On the other hand, by constructing the pyrolysis heating furnace by selecting a material having a strong corrosion resistance, the measures against hydrochloric acid generated at least during the reaction are thoroughly taken, and the above (2) (3)
There is also an idea to concentrate on solving the problem.

That is, in order to extinguish the chlorine-based gas, it is necessary to measure the amount of the chlorine-based gas that is being generated and accurately administer an alkaline agent such as sodium hydroxide or potassium hydroxide that matches the amount. Alternatively, it is conceivable to predict the amount of chlorine-based gas generated and accurately administer an alkaline agent suitable for it.

In any case, chlorine gas is generated when the amount of the alkaline agent to be administered is too small. On the contrary, when the amount is excessive, many post-treatment products are generated together with the residue of the alkaline agent left after the thermal decomposition, which is not desirable in terms of post-treatment efficiency.

Means for accurately measuring the amount of chlorine-based gas that is being generated and means for accurately predicting the amount of chlorine-based gas that may be generated in advance are installed in an actual oilification treatment apparatus and It does not make sense if it is not processed on-line and in real time in the chemical treatment process, and none of the conventional techniques mention this point.

As one solution, a waste synthetic resin material is crushed, and a strict selection work is performed on a large number of these crushed products, the PVC content in the entire crushed product is grasped, and chlorine generated in the oil treatment process is clarified. There is a plan to carry out the thermal decomposition treatment after predicting the amount of system gas.

In this case, it is practically difficult to strictly separate all the crushed materials after crushing the various kinds of waste synthetic resin materials into an extremely large number of crushed materials. It will be inefficient in work.

For these reasons, in order to prevent the generation of chlorine-based gas, it is dealt with by adding an alkaline agent which seems to be excessive to the waste synthetic resin material of which the amount of PVC contained is unknown. There is no choice but to use an oil treatment device that produces a large amount of oil.

[0021] On the other hand, before reaching such an oil treatment apparatus and an oil treatment method, a series of pretreatment operations for disassembling, sorting, crushing and reducing the volume of recovered waste OA equipment and waste home electric appliances. But, of course, it is necessary.

Japanese Unexamined Patent Publication (Kokai) No. 3-161057 discloses a technique for continuously operating a crushing device, a sorting device and a volume reducing device as a coarse waste plant.
Further, Japanese Patent Application Laid-Open No. 58-89320 discloses a technique for automatically continuously feeding and dissolving a synthetic resin material, in which the steps from crushing to melting are continuously transferred using a belt conveyor. .

However, even if such a technique is used, it is extremely difficult to select only a synthetic resin material for the purpose of regeneration or oil conversion from a wide variety of synthetic resin materials. That is, it is not possible to crush all the waste made of composite materials such as home electric appliances as they are in the recovered product, even if the material is different from the synthetic resin material and is reusable. You will not be able to use it as you need.

If a crusher or a crusher is simply used,
Dust and static electricity will be generated.
Effective measures must be taken to control the generation of static electricity. Therefore, there is a problem that the system is complicated and the device cost is high.

The present invention has been made in view of the above circumstances. A first object of the present invention is to provide a safe and efficient dechlorination gasification alternative to the administration of an alkaline agent and to provide a special corrosion. It is an object of the present invention to provide an oil treatment apparatus for a synthetic resin material and an oil treatment method for the same, which can improve the oil treatment efficiency without taking any measures.

The second object is to change the synthetic resin material by heating to decompose it into oil, but at this time, the amount of chlorine-based gas generated is detected in real time, and the optimum amount is always obtained. Of the synthetic resin material to reduce the generation of residue after oilification, and to improve the efficiency of oilification treatment. An object of the present invention is to provide a processing device and an oil treatment method thereof.

A third object is to reliably separate foreign substances such as metal materials mixed in the synthetic resin material from the synthetic resin material as a pretreatment for oiling the synthetic resin material and remove the foreign matter. The present invention aims to provide a synthetic resin material oil treatment apparatus which is more accurate and leads to more efficient oil treatment.

[0028]

In order to satisfy the first object, the oil treatment device for a synthetic resin material according to the first aspect of the present invention provides a synthetic resin material by irradiating the synthetic resin material with ultraviolet rays as claimed in claim 1. UV irradiation means for degassing the chlorine-based gas contained in, and thermal decomposition means for heating and thermally decomposing the synthetic resin material degassed of the chlorine-based gas by the ultraviolet irradiation means, and this thermal decomposition And a means for recovering oil from the synthetic resin material thermally decomposed by the means.

A second aspect of the present invention is characterized in that the ultraviolet irradiation means according to the first aspect is an ultraviolet laser oscillator for freely setting an ultraviolet wavelength and its wavelength band. A third aspect of the present invention is characterized in that the ultraviolet ray irradiating means according to the first aspect includes an optical system that expands an irradiation region of ultraviolet rays emitted from an irradiation source and makes irradiation energy uniform.

According to a fourth aspect, the ultraviolet ray irradiation means according to the first aspect performs the ultraviolet ray irradiation in a closed atmosphere,
It is characterized in that it is provided with either one of a means for discarding and recovering the generated chlorine-based gas and a means for detoxifying the chlorine-based gas.

According to a fifth aspect, the ultraviolet ray irradiating means according to the first aspect comprises means for rolling the synthetic resin material into a thin sheet before the ultraviolet ray irradiation in order to make the ultraviolet ray irradiation of the synthetic resin material effective. It is characterized by that.

According to a sixth aspect of the present invention, the ultraviolet irradiation means according to the first aspect is provided with a means for qualitatively and quantitatively measuring the amount of chlorine-based gas generated by the ultraviolet irradiation.

As a seventh aspect, means for qualitatively and quantitatively measuring the amount of the chlorine-based gas according to the sixth aspect is a gas chromatograph, a gas chromatograph mass spectrometer, a gas chromatograph infrared spectroscopic analyzer, an ultraviolet absorber. It is characterized in that it is at least one of a spectrum analyzer and an ion selective electrode device.

In order to satisfy the first object, the method for oiling a synthetic resin material according to the second aspect of the present invention is, as claim 8, a kneading / volume-reducing step of kneading the input synthetic resin material to reduce its volume. When,
A rolling step of rolling this synthetic resin material into a thin sheet,
This sheet-shaped synthetic resin material is irradiated with ultraviolet rays to irradiate the synthetic resin material with a chlorine-based degassing treatment, and this synthetic resin material is heated to dechlorinate the chlorine-based material. And a thermal decomposition process for thermal decomposition,
An oil recovery step of recovering oil from the synthetic resin material thermally decomposed in the thermal decomposition step.

In order to satisfy the second object, an oil treatment apparatus for a synthetic resin material according to a third aspect of the present invention, as claimed in claim 9, is a kneading / volume-reducing means for kneading the input synthetic resin material to reduce its volume. When,
Pyrolysis means for heating and thermally decomposing this volume-kneaded synthetic resin material, and detection means for constantly detecting the time-dependent change in the amount of chlorine-based gas generated from the synthetic resin material due to the action of this thermal decomposition means. And an alkaline agent supply means for supplying an alkaline agent to the synthetic resin material heated by the thermal decomposition means and a detection signal from the detection means, and also information on a change with time of the detected chlorine-based gas amount. And a control means for calculating the optimum alkali agent supply amount for controlling the alkali agent supply means, and an oil recovery means for recovering oil from the molten synthetic resin material in which the chlorine-based gas is neutralized by the thermal decomposition means. Is provided.

According to a tenth aspect of the present invention, the thermal decomposition means according to the ninth aspect heats and melts the volume-blended and kneaded synthetic resin material, and at the same time, chlorine-based gas is supplied by the alkaline agent administration of the alkaline agent supply means. The neutralization treatment furnace for neutralization and the synthetic resin material heated and melted in the neutralization treatment furnace are further heated to be thermally decomposed, and the chlorine-based gas remaining in the synthetic resin material by the alkali agent administration of the alkali agent supply means. And a pyrolysis heating furnace for neutralizing the.

As the eleventh aspect, the thermal decomposition means according to the ninth aspect heats and melts the volume-blended and kneaded synthetic resin material, and at the same time, chlorine-based gas is supplied by the alkali agent administration of the alkali agent supply means. And a pyrolysis heating furnace for neutralizing and thermally decomposing the synthetic resin material.

In order to satisfy the second object, the method for oiling a synthetic resin material according to a fourth aspect of the present invention is, as a twelfth aspect, a kneading / volume-reducing step of kneading the input synthetic resin material to reduce its volume. And, the kneaded and volume-reduced synthetic resin material is heated and melted, and the neutralizing step of neutralizing the chlorine-based gas generated by administering and supplying an alkaline agent, and the heated and melted synthetic resin material are further heated. The thermal decomposition step of neutralizing chlorine-based gas remaining in the synthetic resin material by administering and supplying an alkaline agent, and the molten synthetic resin material neutralized chlorine-based gas in this thermal decomposition step It consists of an oil recovery process that recovers oil, and at least one of the neutralization process and thermal decomposition process constantly detects the change over time in the chlorine-based gas generation amount and controls the supply amount of the alkaline agent. It is characterized by doing.

In order to satisfy the second object, the method for oiling a synthetic resin material according to a fifth aspect of the present invention is, as a thirteenth aspect, a kneading / volume-reducing step of kneading the input synthetic resin material to reduce its volume. And a thermal decomposition step for heating and melting and thermally decomposing the volume-blended and kneaded synthetic resin material and for neutralizing the chlorine-based gas generated by supplying and supplying an alkaline agent, and chlorine in this thermal decomposition step. An oil recovery step of recovering oil from the molten synthetic resin material in which the system gas has been neutralized, and the thermal decomposition step is
The present invention is characterized in that the supply amount of the alkaline agent is controlled by constantly detecting the change with time of the chlorine-based gas generation amount.

In order to satisfy the second object, an oil treatment apparatus for a synthetic resin material according to a sixth aspect of the present invention is, as claim 14, a thermal decomposition means for heating and thermally decomposing the synthetic resin material, and the thermal decomposition means. By introducing gas generated from the synthetic resin material by the heating action of the means, a water tank equipped with bubbling means for bubbling into water, and a pH meter provided in this water tank, which constantly measures the pH value change of water, The present invention is characterized by comprising a control means for calculating the amount of chlorine-based gas generated from the pH change value measured by the pH meter on a regular basis and quantitatively, and controlling the concentration of water based on the result.

In order to satisfy the second object, an oil treatment method for a synthetic resin material according to a seventh aspect of the present invention is, as claim 15, a thermal decomposition step of heating and thermally decomposing a synthetic resin material, and this thermal decomposition. The gas generated from the synthetic resin material is introduced along with the process, and it consists of a bubbling process for bubbling into water and a detection process for constantly measuring the pH value change of this water. It is characterized in that the amount of water generated is calculated regularly and quantitatively, and the concentration of water is controlled based on the result.

In order to satisfy the third object, the oil treatment apparatus for synthetic resin material according to the eighth invention, as claimed in claim 16, heats and melts the synthetic resin material selected from the waste synthetic resin products,
Further, the pressing means for pressing into a sheet shape, the first detecting means for detecting foreign matter by judging from the concavo-convex state due to the sheet thickness of the sheet-like synthetic resin material, and the cooling temperature distribution of the sheet-like synthetic resin material are distinguished. Detecting means for detecting foreign matter, removing means for cutting and removing the foreign matter detected by the first detecting means and the second detecting means from the sheet-like synthetic resin material, and the removing means detects foreign matter. It is characterized in that it is provided with an oiling means for heating the sheet-shaped synthetic resin material to thermally decompose it and condensing the vaporized gas to recover the oil.

According to a seventeenth aspect of the present invention, the pressing means according to the sixteenth aspect is characterized in that the heating temperature for the synthetic resin material is set to be not lower than the plasticizing temperature of the synthetic resin material and not higher than the decomposition temperature.

According to an eighteenth aspect, the first detecting means according to the sixteenth aspect is a means for illuminating the surface of the sheet-shaped synthetic resin material, and an image of a bright and dark state accompanying the unevenness of the surface due to the illumination light, and an image is obtained. It is characterized in that it is provided with means for recognizing the position of the foreign matter by processing and for recognizing its position.

As a nineteenth aspect, the second detecting means according to the sixteenth aspect is a radiation thermometer for measuring a cooling temperature distribution after the sheet-shaped molding which is caused by a difference in thermal conductivity between the synthetic resin material and the foreign matter. It is characterized by

According to a twentieth aspect of the present invention, the synthetic resin material which is heated and melted by the pressing means according to the sixteenth aspect and pressed into a sheet form is a means for partially recognizing the shape of a waste synthetic resin product by image processing. It is characterized in that it is selected in a pretreatment unit having means for cutting each part based on this shape recognition and means for selecting each cut part for oil treatment and non-treatment. .

[0047]

In the first invention satisfying the first object, the synthetic resin material is irradiated with ultraviolet rays, and the chlorine-based gas contained therein is degassed by a photoexcitation reaction. In the third invention satisfying the second object, the time-dependent change of the amount of chlorine-based gas generated from the synthetic resin material due to the action of the thermal decomposition means is constantly detected, and the optimum time-based change information is used to determine the optimum value. The amount of alkaline agent supplied is calculated to control the supply of alkaline agent.

In the eighth invention satisfying the third object, a synthetic resin material selected from a waste synthetic resin product is heated and melted and pressed into a sheet, and the sheet-shaped synthetic resin material has unevenness depending on the sheet thickness. The foreign matter is detected from the state, and the foreign matter is detected by judging from the cooling temperature distribution of the sheet-shaped synthetic resin material, and the detected foreign matter is cut and removed.

[0049]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the first invention and the second invention will be described below with reference to FIG. In the figure, 1 is a hopper.
The hopper 1 has an opening on the upper surface and serves as an inlet 2 for the waste synthetic resin material. The lower end of the hopper 1 serves as an outlet, and the kneading machine 2 in which the screw shaft constantly rotates is continuously provided in the cylindrical body.

The kneading machine 2 is erected vertically, and the lower end of the kneading machine 2 is bent in the horizontal direction, and the rolling machine 3 is connected in series. In this rolling mill 3, a pair of rollers are in pressure contact with each other, and are rotationally driven in opposite directions to each other, so that they are in rolling contact with each other in the axial direction of the rollers.

A delivery mechanism 4 composed of a conveyor belt is provided at the outlet of the rolling mill 3, and a degassing processing chamber 5 is provided at the end of the delivery direction. The degassing chamber 5
Is formed in a hermetically sealed atmosphere in a housing 6, and an ultraviolet light source 7 that is an ultraviolet laser oscillator is installed on the ceiling.
It has. The ultraviolet light source 7 can freely set the ultraviolet wavelength and its wavelength band.

Further, in the irradiation direction of the ultraviolet ray generating light source 7,
A lens 8 which is an optical element is provided, and an ultraviolet light source 7 is provided.
It has a function of enlarging the irradiation area of the ultraviolet rays irradiated by and also transmitting the energy in a uniform manner. Of course, the object to be carried out by the carrying mechanism 4, that is, the sheet-shaped synthetic resin material Sa described later is set to be located in the ultraviolet ray transmitting range of the lens 8.

Further, an exhaust gas treatment device 9 is continuously provided in the degassing treatment chamber 5 through a pipe having an opening / closing valve 9a in the middle thereof. The exhaust gas treatment device 9 has a configuration capable of absorbing and recovering chlorine-based gas such as hydrogen chloride gas.

A chlorine-based gas detector 10 is provided outside the casing 6.
Is provided and connected to the sensor 11 provided in the degassing processing chamber 5. The chlorine-based gas detector 10 has a function of measuring the absolute amount of chlorine-based gas generated in the degassing treatment chamber 5, and is, for example, a gas chromatograph, a gas chromatograph mass spectrometer, a gas chromatograph infrared spectroscopic analyzer. Device or UV absorption spectrum analyzer.

The detector 10 is electrically connected to the control unit 12 which is a computer, and sends a detection value signal thereof. Here, the conveyance drive of the conveyance mechanism 4 is performed based on the signal. It is a configuration for controlling.

On the other hand, the degassing treatment chamber 5 is provided with a lead-out portion for leading out the synthetic resin material which has been treated with the chlorine-based gas, and is connected to the atmospheric heating furnace 13. The atmospheric pressure heating furnace 13 is provided with a heater (not shown) so that the synthetic resin material collected in the furnace is heated and held at about 450 ° C. That is, the synthetic resin material is thermally decomposed in the heating furnace 13 to produce heavy oil.

Further, a primary condenser 14 is connected to the atmospheric pressure heating furnace 13, and the heavy oil discharged from the heating furnace 13 is condensed at about 250 ° C. to separate the light oil from the heavy oil. It is supposed to do.

A pressure heating furnace 15 is communicated with the primary condenser 14, and the heavy oil introduced therein is heated and held at about 450 ° C. to turn the heavy oil into a light oil. A secondary condenser 16 is connected to the pressure heating furnace 15 so that the gas generated from the normal pressure heating furnace 13 and the pressure heating furnace 15 is cooled and liquefied.

The secondary condenser 16 is communicated with an oil storage chamber 17 for collecting the recovered product oil and an exhaust gas treatment device 18 for treating the exhaust gas separated by the secondary condenser.
An oil treatment device for waste synthetic resin material configured in this way, which is disassembled from waste synthetic resin products, sorted and removed of foreign substances such as metal materials, and subjected to pretreatment processes such as washing and drying. The resin material S is put into the hopper 1 as a crushed product of small pieces.

These waste synthetic resin materials S are used in this hopper 1.
After passing through the kneading machine 2, it is rolled by the rolling machine 3 and reduced in volume to a sheet Sa having a thickness that allows ultraviolet rays to sufficiently pass therethrough as described later.

The sheet-shaped synthetic resin material Sa is transferred to the transport mechanism 4
Is transported to the degassing processing chamber 5. The ultraviolet light source 7 is turned on, and the sheet-shaped synthetic resin material Sa held at a predetermined position in the processing chamber is irradiated with ultraviolet light through the lens 8.

The wavelength and wavelength band of the ultraviolet light emitted from the ultraviolet light source 7 can be freely set. The lens 8 expands the irradiation area of the sheet-shaped synthetic resin material Sa of the transmitted ultraviolet rays and makes the energy uniform. Moreover, the synthetic resin material Sa is formed in a sheet shape that is thin enough to allow the ultraviolet rays to pass therethrough, and the ultraviolet ray-excited reaction reliably occurs. That is, if PVC is used as a typical chlorine-based synthetic resin material, this chemical formula is

[0063]

[Equation 1] Therefore, in order to achieve dechlorination, the functional group of C-Cl may be dissociated.

Further, in order to induce the photoexcited dissociation reaction by the irradiation of ultraviolet rays, the C-Cl covalent bond energy is generally set to 328 kJ / mol, and therefore ultraviolet rays corresponding to this energy may be irradiated. Light energy (E)
Is expressed by the following equation using the Planck's constant (h), the speed of light (c), and the wavelength (λ).

[0065]

[Equation 2]

Therefore, a wavelength variable laser ultraviolet light source is preferable as the ultraviolet light source. Further, in order to selectively and efficiently carry out the photoexcited reaction, it is preferable that the lens 8 has a function as a bandpass filter for extracting only a wavelength in a specific range.

In this way, in the degassing processing chamber 5, the photoexcitation dissociation reaction is caused by the irradiation of the ultraviolet rays to perform the dechlorination gas treatment, and the chlorine gas detector 10 detects the amount of chlorine gas generated and the control unit The detected value signal is sent to 12.

When it is confirmed in the control unit 12 that the amount of chlorine-based gas generated is saturated, a drive signal is sent to the transport mechanism 4 to the degassing chamber 5 for the synthetic resin material rolled into the next sheet. Instruct the transportation of.

On the other hand, the control unit 12 gives an instruction to open the on-off valve 9a to guide the chlorine-based gas (Cl2, HCl) generated in the degassing processing chamber 5 to the chlorine-based gas processing device 9 where it is absorbed and recovered. .

Further, the sheet-like synthetic resin material Sa in which the chlorine-based gas generation amount is saturated is introduced into the atmospheric pressure heating furnace 13, and
The primary condenser 14, the pressurizing heating furnace 15, and the secondary condenser 16 are sequentially introduced, and after a predetermined process, they are completely oiled, and the oil storage chamber 17
It is collected and stored in.

According to the above-described oil treatment apparatus for synthetic resin material, the synthetic resin material is irradiated with ultraviolet rays so that the chlorine-based gas contained in the waste synthetic resin material is degassed.
Chlorine gas can be eliminated as much as possible from the process of oil production and refining,
The quality of the produced oil is improved.

Since hydrochloric acid, which is highly corrosive, is not generated, the life of the device can be extended and maintenance-free. Since water is not contained at all in the dechlorination gas treatment process, the absolute amount of chlorine-based gas generated can be accurately detected, and reliability in each control can be improved.

Since sodium hydroxide as an alkali neutralizing agent is unnecessary and sodium chloride is not generated, the use cost of sodium hydroxide and the treatment cost of sodium chloride can be reduced.

In this apparatus, since ultraviolet rays are simply irradiated to achieve dechlorination gasification, running cost can be avoided. In the above embodiment, the chlorine-based gas generated in the degassing treatment chamber 5 is guided to the gas treatment device 9 and is absorbed and recovered there.
The present invention is not limited to this, and a means for detoxifying the generated chlorine-based gas may be used.

2 to 4 show the third invention to the seventh invention.
Is an oil treatment device for waste synthetic resin material corresponding to the invention of. First, referring to FIG. 2, reference numeral 20 in FIG.
It is a transfer machine for transferring the waste synthetic resin material S that has been shredded through the pretreatment process. At the transfer end of this transfer machine 20, kneading /
The hopper mouth 21a of the volume reducer 21 is arranged to face each other. This kneading / volume-reducing machine 21 has a cylindrical body 21 extending in the horizontal direction.
A screw shaft 21c is provided in b.

A neutralization furnace 22 is connected to the outlet of the kneading / volume reducing machine 21. This neutralization treatment furnace 22 is provided with a heater 23 at the bottom thereof, and at the top thereof, an alkaline agent A for storing an alkaline agent A such as sodium hydroxide or potassium hydroxide which is a chlorine gas neutralizing agent. Container 24
It is connected via the on-off valve 25 controlled by the valve controller 25a.

A stirrer 26 for stirring the internal atmosphere is provided above the neutralization furnace 22, and a chlorine-based gas concentration measuring instrument 27 (hereinafter referred to as a gas concentration measuring instrument) is connected via an aspirator 27a. It

The valve controller 25a for controlling the opening / closing operation of the opening / closing valve 25, the drive source of the agitator 26 and the gas concentration measuring device 27 are electrically connected to a first control unit 28 which is a computer.

The gas concentration measuring device 27 is the neutralization processing furnace 2
2 has the function of measuring the absolute amount of salt gas such as hydrogen chloride gas, which is used in, for example, a gas chromatograph, a gas chromatograph mass spectrometer, a gas chromatograph infrared spectroscopic analyzer, an ultraviolet absorption spectrum analyzer. It is selected from either.

The gas concentration measuring device 27 sends the measured value of the chlorine-based gas concentration measured here to the first control section 28, the opening time of the on-off valve 25 is controlled by the detected value, and the agitator 26 is operated. The operation is controlled.

A discharge pipe 29 is provided at the bottom of the neutralization furnace 22.
Are connected to the pyrolysis heating furnace 30. An opening / closing valve 31 is provided in the middle of the discharge pipe 29, and a valve controller 31a for controlling the opening / closing is electrically connected to the first controller 28 so that the opening / closing is controlled. Has become.

A heater 31 is provided at the bottom of the pyrolysis heating furnace 30. The heating capacity of the heating heater 31 is set to be much larger than that of the heating heater 23 of the neutralization processing furnace 22.

An auxiliary alkaline agent container 32, in which the alkaline agent A is stored, is connected to the upper portion of the pyrolysis heating furnace 30 via an opening / closing valve 33. A stirrer 34 that stirs the internal atmosphere is provided in the vicinity of this connecting portion, and a gas concentration measuring instrument 37 is provided via an auxiliary condenser 36. Note that the suction device 37a is provided immediately in front of the gas concentration measuring device 37, as in the case described above.

The valve controller 33a for controlling the opening / closing operation of the opening / closing valve 33, the drive source of the stirrer 34 and the gas concentration measuring instrument 37 are electrically connected to a second controller 38 which is a computer.

The gas concentration measuring device 37 has a function of measuring the absolute amount of chlorine-based gas such as hydrogen chloride gas generated in the pyrolysis heating furnace 30, and is, for example, a gas chromatograph or a gas chromatograph mass spectrometer. , A gas chromatograph infrared spectroscopic analyzer, or an ultraviolet absorption spectroscopic analyzer.

The gas concentration measuring instrument 37 sends the measured value of the chlorine-based gas concentration measured here to the second control section 38, the opening time of the on-off valve 33 is controlled by the detected value, and the agitator 34 is operated. The operation is controlled.

A derivation pipe 39 is provided on the upper portion of the pyrolysis heating furnace 33, and is connected to a condenser (not shown) here. An oil recovery unit is connected to this condenser to collect the liquefied oil in the condenser.

In the waste synthetic resin material oil treatment apparatus constructed as described above, the waste synthetic resin material S, which has been shredded through the pretreatment process, is transferred by the transfer device 20 and fed into the hopper 21a.

The waste synthetic resin material S is introduced into the kneading / volume-reducing machine 21 to be kneaded / volume-reduced, and in a semi-molten state by the temperature setting of 200 ° C., supplied to the neutralization treatment furnace 22. Here, the heater 23 is heating the inside of the furnace, and the waste synthetic resin material is heated to about 350 ° C. and becomes a molten state.

In this state, the PVC contained in the waste synthetic resin material S is desorbed from hydrogen and chlorine from the structural state shown in the chemical formula (1) above to generate a chlorine-based gas such as hydrogen chloride gas. Come to do.

Naturally, the PV contained in the waste synthetic resin material S
If the amount of C is large, the amount of chlorine-based gas generated will also increase. The gas concentration measuring device 27 sends the gas in the neutralization processing furnace 22 through the suction device 27a, and constantly monitors the amount of chlorine-based gas generated.

When the first control unit 28 determines that the measured value of the gas concentration measuring device 27 has exceeded the predetermined concentration, this sends a control signal to the valve controller 25a to open the opening / closing valve 25. Therefore, the optimum amount of the alkaline agent A is injected from the alkaline agent container 24 into the neutralization processing furnace 22, and the molten waste synthetic resin material S is neutralized.

At this time, the stirrer 26 is driven to stir, so that the alkaline agent A to be administered is uniformly dispersed in the processing furnace 22. Therefore, in the neutralization processing furnace 22, a chemical reaction of HCl + NaOH → NaCl + H2 O is appropriately performed, and generation of highly corrosive chlorine-based gas can be suppressed. Such neutralization treatment is performed by the above kneading /
It is carried out after the waste synthetic resin material S continuously supplied from the volume reducer 21 is accumulated in the neutralization processing furnace 22 to a certain amount.

When the first control unit 28 judges from the result of the measurement value of the measuring instrument 27 the state of the decrease in the generation of chlorine-based gas in the neutralization treatment furnace 22, and confirms that it is below the predetermined value, the discharge pipe The valve controller 31 of the on-off valve 31 provided in 29
An open command is issued to a and the molten waste synthetic resin material S for which the neutralization process has been completed is led to the pyrolysis heating furnace 30.

At the same time, the first control section 28 gives an instruction to stop the monitoring of the HCl gas concentration measuring device 27 and sends an instruction to stop the supply of the alkaline agent A to the valve controller 31a to close the on-off valve 31. .

The molten waste synthetic resin material S introduced into the pyrolysis heating furnace 30 is heated to a high temperature of about 350 ° C. or higher, and changes from liquid to gas gas. The vaporized gas is sent from the outlet pipe 39 to a condenser (not shown) and liquefied. That is, low-carbon oil is produced.

As described above, the waste synthetic resin material S is neutralized in the neutralization treatment furnace 22, and in this state, the thermal decomposition heating furnace 3
However, in reality, complete neutralization in the neutralization treatment furnace is extremely difficult, and even when the thermal decomposition in the thermal decomposition furnace is a small amount, residual chlorine is still present. System gas is generated.

Therefore, the gas concentration measuring device 37 sends a part of the gas generated in the pyrolysis heating furnace 30 through the auxiliary condenser 36 and the suction device 37a to constantly monitor the amount of chlorine-based gas generated. To do.

When the second control unit 38 judges that the measured value of the gas concentration measuring instrument 37 exceeds the predetermined concentration, this sends an opening instruction signal to the valve controller 33a of the on-off valve 33. An optimal amount of the alkaline agent is injected from the alkaline agent container 32 into the thermal decomposition heating furnace 30 to neutralize the waste synthetic resin material S and suppress the generation of residual chlorine-based gas.

The supply amount of the alkaline agent A is controlled by the opening / closing time of the on-off valve 33, and at the same time, the stirrer 34 drives the stirring operation to evenly distribute the administered alkaline agent A in the furnace 30. It is the same.

In this way, it is possible to suppress the generation of chlorine-based gas in the thermal decomposition heating furnace 30 and to obtain a high-quality oil without containing a chlorine component in the produced oil.

When the synthetic resin material has been thermally decomposed,
Eventually, carbon burned by the synthetic resin material and chloride formed by neutralization with the alkaline agent are left on the bottom of the heating furnace 30 as a residue Z.
However, by optimizing the dose of the alkaline agent A, the amount of residue can be significantly reduced, and the number of times of residue collection can be reduced.

The auxiliary condenser 36 provided in front of the gas concentration measuring instrument 37 connected to the pyrolysis heating furnace 30 is arranged inside the measuring instrument 37 when the high temperature gas is directly introduced from the heating oven 30 to the measuring instrument 37. There is a risk that the gas will condense and become clogged, so this is provided to avoid this.

FIG. 3 shows an oilification treatment apparatus which does not require the neutralization treatment furnace in the oilification treatment apparatus described above. Reference numeral 40 in the figure is a transfer machine for transferring the waste synthetic resin material S which has been fragmented through the pretreatment process. Reference numeral 41 is a kneading / reducing machine, the hopper port 41a of which is arranged so as to face the transfer end of the transfer machine 40, and a screw shaft 41c is provided in a cylindrical body 41b extending in the horizontal direction.

A first chlorine-based gas concentration detector (hereinafter, referred to as a first gas concentration detector) 42 for measuring the gas concentration of chlorine-based gas 42 is located near the lead-out portion of the cylindrical body 41b. 42a, and a pyrolysis heating furnace 43 is connected to the outlet.

A heater 44 having a large heating capacity is provided at the bottom of the pyrolysis heating furnace 43, while an alkali agent A such as sodium hydroxide or potassium hydroxide is provided at the top.
The alkaline agent container 44 in which is stored is connected via the opening / closing valve 45 controlled by the valve controller 45a.

Further, a second chlorine-based gas concentration measuring device (hereinafter referred to as a second gas concentration detector) is provided above the pyrolysis heating furnace 43 via an agitator 46, an auxiliary condenser 47 and a suction device 48a. A discharge pipe 49 communicating with the condenser 48 and the oil recovery device (not shown) is provided.

The valve controller 45a, the drive source of the stirrer 46, and the first and second gas concentration detectors 48 are electrically connected to a controller 50 composed of a computer. The first and second gas concentration measuring devices 48 send the measured value of the gas concentration to the control unit 50, and the open / close valve 4
5, the opening time is controlled, and the operation control of the stirrer 46 is performed.

In such an oiling treatment apparatus, the waste synthetic resin material S which has been shredded into pieces is transferred by the transfer device 40 and put into the hopper 41a. The waste synthetic resin material S is kneaded and reduced in volume by the kneading / volume reducing machine 41, and becomes a semi-molten state by setting the temperature to 200 ° C.

In the PVC contained in the waste synthetic resin material S, hydrogen and chlorine are desorbed from the structural state shown in the chemical formula (1), and chlorine-based gas such as hydrogen chloride gas is generated.
Naturally, if the amount of PVC contained is large, the concentration of chlorine-based gas increases.

The first gas concentration measuring device 42 feeds a part of the gas in the kneading / volume reducing device 41 through the suction device 42a and constantly monitors the amount of chlorine-based gas generated. When the measured value exceeds the predetermined density, the control unit 50
Is judged, the valve controller 45 should be opened to open the on-off valve 45.
Send a control signal to a.

From the alkali agent container 44 to the pyrolysis heating furnace 43
Kneading and volume reduction machine 41
The molten waste synthetic resin material S introduced into the heating furnace is neutralized. The supply amount of the alkaline agent A is controlled by the opening / closing time of the opening / closing valve 45. The stirrer 46 also drives the stirrer so that the alkaline agent A to be administered is heated in the heating furnace 43.
Disperses evenly inside.

Therefore, in the thermal decomposition heating furnace 43, the chemical reaction of HCl + NaOH → NaCl + H2O is properly carried out, and the generation of highly corrosive chlorine-based gas can be suppressed. Such neutralization treatment is performed by the above kneading /
The waste synthetic resin material continuously supplied from the volume reducer 41 is stored in the pyrolysis heating furnace 43 up to a certain amount before the operation.

Then, the waste synthetic resin material S melted by the heating action in the thermal decomposition heating furnace 43 is gasified into gas and led out from the outlet pipe 49, and is liquefied by the condenser to produce low carbonized oil, and the oil is recovered. Is done.

On the other hand, a part of the gas generated in the thermal decomposition heating furnace 43 is taken in by the second gas concentration measuring device 48 via the auxiliary condenser 47, and the chlorine-based gas concentration is measured here. That is, the gas concentration measuring device 48 rechecks the chlorine-based gas concentration in the pyrolysis heating furnace 43, and if it is confirmed that this gas concentration is high, the control unit 50
Instructs the administration of the alkaline agent A and completely stops the generation of chlorine-based gas.

In this way, it is possible to suppress the generation of chlorine-based gas in the pyrolysis heating furnace 43, and to collect high-quality oil since the produced oil does not contain a chlorine component.

After the thermal decomposition of the synthetic resin material, carbon burned by the synthetic resin material and chlorides formed by neutralization with the alkaline agent are accumulated as a residue at the bottom of the heating furnace. The amount of residue can be significantly reduced by optimizing the amount, and the number of times of collecting the residue can be reduced, as in the previous embodiment.

As described above, the waste synthetic resin material oil treatment apparatus described with reference to FIGS. 2 and 3 are commonly used to measure the amount of chlorine-based gas generated in real time, at regular intervals and with high accuracy. The optimal dose of the alkaline agent should be reduced. The quality of the produced oil can be improved and the amount of the residue can be reduced.

FIG. 4 shows an oil treatment apparatus for waste synthetic resin material corresponding to the sixth and seventh aspects of the invention. In the figure, reference numeral 51 is a pyrolysis heating furnace, and a heating heater 52 having a large capacity is provided at the bottom thereof. At the bottom of the heating furnace 51, there is provided an outlet pipe 53 which communicates with a condenser and an oil recovery device (not shown), and a gas bubbling pipe 54 bent in an inverted U shape.
Is provided at one end.

A suction device 55 is provided in the middle of the gas bubbling pipe 54, and the other end opening is located in a pure water tank 56 for storing water, for example, pure water. The pure water tank 56 is provided with a pure water supply pipe 57 having an opening / closing valve 57a in the middle thereof, a waste gas discharge pipe 59 having a waste gas treatment device 58, and an electrode portion 60a of the pH meter 60. A pure water discharge pipe 61 having an opening / closing valve 61a in the middle is connected to the bottom.

An on-off valve 57a of the pure water supply pipe 57, p
The H meter 60 and the open / close valve 61a of the pure water discharge pipe 61 are electrically connected to the control unit 62 including a computer, and control described later is performed.

[0122] The waste synthetic resin material oil treatment apparatus configured as described above, in which the waste synthetic resin material S charged into the pyrolysis heating furnace 51 is heated to a high temperature and melted, and is gas gas. It is liquefied and led out from the outlet pipe 53, liquefied in the condenser, and the oil is recovered.

A part of the gas generated in the heating furnace 51 is taken into the gas bubbling pipe 54 by the suction device 55 and bubbled in the pure water in the pure water tank 56. That is,
By bubbling the gas in the heating furnace 51 into the pure water, the chlorine-based gas contained therein is dissolved in the pure water.

When the chlorine-based gas is dissolved in pure water, the pure water is acidified and the pH value becomes small. Moreover, the higher the chlorine-based gas concentration, the greater the variation in pH value. Therefore, if the pH value change of pure water is measured by the pH meter 60 equipped with the electrode 60a, the concentration of chlorine-based gas contained in the gas generated in the pyrolysis heating furnace 56 can be known.

The pH meter 60 measures the pH value of pure water in the pure water layer 56 and sends the detected value to the controller 62 in real time. Here, the measured pH value change value is analyzed and the amount of chlorine-based gas generated is measured regularly and quantitatively.

If the control unit 62 determines that the pure water in the pure water tank 56 has exceeded the sensitivity limit of the pH value change, the open / close valve 57a of the pure water supply pipe 57 and the open / close valve 61 of the pure water discharge pipe 61.
Controls the opening and closing of a. Pure water in the pure water tank 56 is automatically replaced.

The gas not melted in the pure water in the pure water tank 56 is detoxified by the exhaust gas processing device 58 and discharged into the atmosphere. Also in this oiling apparatus, the alkaline agent container as described above may be connected to administer the alkaline agent to the thermal decomposition heating furnace 51 under the control of the control unit 62.

Further, it is needless to say that the pure water used in the above-mentioned embodiments may not necessarily be pure water but may contain some impurities. FIG. 5 shows an oil treatment apparatus for waste synthetic resin material according to the eighth invention.

Reference numeral 70 in the figure denotes a transfer machine for disposing and discarding the waste synthetic resin material Sb obtained by disassembling and selecting waste synthetic resin products such as waste home electric appliances and waste OA products. A press chamber 71 is arranged opposite to the transfer end of the transfer device 70, and the transferred waste synthetic resin material Sb can be discharged into the press chamber 71. However, it is not the release at the same place, but the press chamber 71
It has a forward / backward function so that it can be uniformly discharged over the entire bottom surface.

At the bottom of the press chamber 71, there is a temperature controller 72.
A press chamber heater 72 whose temperature is controlled by a is provided. This upper surface is open, and the press machine 73 is arranged to face it.

The press machine 73 has a heater 7 inside.
A press table 73b for accommodating 3a is provided so that it can be raised and lowered. The pressure control of the press table 73b is controlled by the press machine pressure controller 73c, and the heating temperature of the heater 73a is controlled by the press machine temperature controller 73d.

Further, the opposite side surfaces of the press chamber 71 are partially open to each other, and a sending machine 74 is arranged in one of the openings and a shutter 75 is provided in the other opening.

A guide chute 76 is provided on the shutter 75.
The holding mechanism 77 is provided via the. This holding mechanism 77
Is for holding the position of the sheet-shaped waste synthetic resin material Sc pressed in the press chamber 71.

The illuminator 78 is opposed to the holding mechanism 77.
And a CCD camera 79 is arranged. These illuminators 7
8 and the CCD camera 79 are electrically connected to the controller 81 via the image recognizer 80.

Further, a radiation thermometer 82 is arranged so as to face the holding mechanism 77, which is electrically connected to the control section 81 via a temperature distribution recognizing device 83. A cutting machine 84 is arranged so as to face the holding mechanism 77. This cutting machine 8
4 includes a cutter 85 whose position can be adjusted in the XYZ directions, and is electrically connected to the control unit 81 via a cutter controller 85a.

The cutting machine 84 is provided with a foreign matter accumulating section 86 for accumulating the foreign matter X cut by the cutter 85, and a vacuum mechanism 87 for discharging the foreign matter in the accumulating section to the outside. There is.

Adjacent to such a holding mechanism 77, an auxiliary transfer machine 88 for transferring the waste synthetic resin material introduced from the holding mechanism to the oilification processing section Y is provided. Here, the oil treatment section Y has the same configuration as that described above with reference to FIG. That is, the atmospheric heating furnace 13, the primary condenser 14, the pressurizing heating furnace 15, and the secondary condenser 16 are arranged in order to communicate with each other, and an exhaust gas treatment device 18 and an oil storage chamber 17 are further provided on the outlet side. It is arranged in the state of communicating with.

Thus, the waste synthetic resin material Sb disassembled from the waste synthetic resin products such as waste home electric appliances and waste OA equipment and sorted is transferred to the transfer device 70 and heated by the heater 72 in the press chamber. Released to 71.

When a predetermined amount of waste synthetic resin material Sb is discharged to the bottom of the press chamber 71 in a substantially uniform state, the press machine 73
Works. That is, the press table 73b in which the internal heater 73a is heated is lowered, and the waste synthetic resin material in the press chamber 71 is heated and pressed while the pressure is controlled.

The heating temperature is preferably set to about 100 to 200 ° C. in consideration of the plastic state of the synthetic resin material and the thermal decomposition of the synthetic resin material. The waste synthetic resin material is melted and rolled into a sheet having a substantially uniform thickness.

Then, the shutter 75 is opened and the extruder 74 is operated. Sheet-shaped waste synthetic resin material Sc
Is pushed out of the press chamber 71, slides on the guide chute 76, and is held by the holding mechanism 77.

The illuminator 78 lights up and illuminates the sheet-shaped waste synthetic resin material Sc held by the holding mechanism 77, and the CCD
The camera 79 images the uneven shape of the upper surface of the waste synthetic resin material. The image recognizer 80 image-processes the bright / dark state due to the unevenness formation on the upper surface of the sheet-shaped waste synthetic resin material Sc and sends it to the control unit 81, where it determines the presence or absence of the convex portion and recognizes its position.

At the same time, the radiation thermometer 82 irradiates and absorbs radiation over the entire surface of the sheet-shaped waste synthetic resin material Sc. If there is a foreign substance, the temperature distribution after the sheet-shaped molding is partially different due to the difference in thermal conductivity with the synthetic resin material, and the temperature distribution recognition device 83 recognizes the temperature distribution. The control unit 81 receives the signal and determines the presence or absence of foreign matter.

That is, although the waste synthetic resin material Sb should have been separated from the metal material, paper, etc. in the step before being transferred to the transfer device 70, it is made into pieces to some extent. Therefore, it is difficult to make a complete selection. Therefore, it is highly conceivable that foreign matter such as metal material or paper is mixed in the waste synthetic resin material Sc which is heated and pressed in the press chamber 71 and rolled into a sheet.

If the metallic foreign matter is mixed in the waste synthetic resin material, the metallic foreign matter is more difficult to be pressed than the synthetic resin material, so that the portion becomes convex as compared with the entire thickness. . The illuminator 78 illuminates this convex portion, the CCD camera 79 takes an image, and the image recognizer 80 performs image recognition by light and dark, and the control unit 81 confirms its position.

Further, when paper or the like is mixed in, heat easily escapes as compared with the synthetic resin material, so that the temperature cooling change is large compared to the overall sheet temperature. The radiation thermometer 82 detects such a temperature decrease portion, and the control unit 81, which is recognized by the temperature distribution recognizer 83, confirms the presence or absence of foreign matter.

The control unit 81 receives these detection signals, determines the foreign matter and recognizes its position, and sends the information of the result to the controller 85a of the cutting machine 84. The cutter 85 operates to cut and remove the foreign matter X mixed in the sheet-shaped waste synthetic resin material Sc, and discharges the foreign matter X to the foreign matter accumulating section 86.

The sheet-shaped waste synthetic resin material Sc from which the foreign matter X has been completely removed is released from the holding mechanism 77, transferred to the auxiliary transfer machine 88, and guided to the oilification processing section Y. When a predetermined amount of foreign matter is accumulated in the foreign matter accumulating section 86, the vacuum mechanism 87 operates to remove it to the outside.

In the oil treatment section Y, the waste synthetic resin material Sc is thermally decomposed and gasified in the atmospheric pressure heating furnace 13, and the primary condenser 14 is used.
After condensing and liquefying in (1), it is again heated in the pressure heating furnace 15 to be pyrolyzed. The gasified synthetic resin is condensed and liquefied in the secondary condenser 16 and collected in the oil recovery unit 17.

Incidentally, such a foreign matter removing step is not necessarily limited to the pretreatment of the oiling treatment section Y, and can also be applied as a pretreatment step of a recycling apparatus for recycling a waste synthetic resin material.

In any case, by adopting the above-mentioned pretreatment means, it becomes possible to select only the material for oilification or regeneration from a wide variety of wastes,
Recycled products other than synthetic resin materials can be efficiently collected.

Further, without using a conventional crusher or crusher, foreign matter removal or volume reduction can be performed as a pretreatment for the oilification treatment, and it becomes unnecessary to take measures against dust and static electricity. Simplification and cost reduction can be obtained.

FIG. 6 shows a dismantling / sorting device which constitutes a pretreatment device for the oil treatment device for waste synthetic resin material described above. In the figure, a main transfer path 90a of a transfer device 90 for transferring an object to be processed H which is a discarded synthetic resin product such as discarded home electric appliances and OA equipment, and the transfer amount and stop position thereof are accurately controlled. The controller 91 for is electrically connected.

An illuminator 92 and a CCD camera 93 for image detection are arranged so as to face the stop position of the main transfer path 90a, illuminate the object H to be processed on the main transfer path 90a, and image its form. It is supposed to do. Further, a cutting machine 94 and a vacuum suction machine 95 are arranged in this vicinity.

The cutting machine 94 has a cutter 94a whose position is movable in the XYZ directions. The cutting machine controller 94b of the cutting machine 94 is electrically connected to the three-dimensional shape recognizer 97 via the position recognizer 96.

Since the illuminator 92 and the CCD camera 93 are also electrically connected to the three-dimensional shape recognizing device 97, the position of the cutter cutter 94a is three-dimensional based on the image pickup signal from the CCD camera 93. Controlled.

The vacuum suction device 95 has a suction port 95a whose position is movable in the XYZ directions.
The vacuum controller 95b is electrically connected to the three-dimensional shape recognizer 97, and the position thereof is three-dimensionally controlled.

The first branch transfer path 90b and the second branch transfer path 90 are opposed to the end of the main transfer path 90a of the transfer device 90.
c is provided so as to branch. The suction port body 95a is freely movable in the range from the stop position of the main transfer path 90a to the first and second branch transfer paths 90b, 90c.

A dismantling / sorting device as a pretreatment device configured as described above, which includes discarded electric appliances and O
The processing object H such as the product A is transferred through the main transfer path 90a.
After stopping at a predetermined position, the illuminator 9
2 illuminates, and the CCD camera 93 images its appearance.

The three-dimensional shape recognizing device 97 recognizes the object H to be processed three-dimensionally based on the image pickup information, and recognizes the positions of the corner portion and the edge portion of the object to be processed which is, for example, a refrigerator.

The position information of the corner portion and the edge portion is sent to the cutting machine controller 94b via the position recognizing device 96, and controls the cutter 94a of the cutting machine 94. That is,
The cutter 94a cuts the refrigerator into a corner portion and an edge portion.

Further, for example, when completely cutting one side wall of the refrigerator, the cutting position information is used as the suction device controller 95.
Then, the suction port body 95a is adsorbed on the side wall to be cut. In this state, the cutting action of the cutter 94a is started, and the completion of cutting is awaited.

The portion that has been cut and dropped on the main transfer path 90a or the portion that can be dismantled is the suction port body 95.
a is adsorbed, and is transferred separately to the first branch transfer path 99b and the second branch transfer path 90c based on the instruction signal from the controller 95b.

Here, for example, a non-collected material Ha such as a compressor or a circuit board is transferred to the first branch transfer path 90b, and a side wall portion or the like is recycled or oiled to the second branch transfer path 90c. The synthetic resin material S to be transferred is transferred.

That is, before cutting and dismantling, the main transfer path 90
It is possible to understand what the object to be processed H on a is by image recognition of the outer diameter form, and the composition of the member can be known from the structure of the product. Therefore, from the relationship between the disassembly order and the disassembly position. Therefore, it is possible to reliably determine whether or not the material should be recycled or oiled.

With the dismantling / sorting device as such a pretreatment device, all the processes are automatically performed without the need for manpower, the work can be speeded up, and the labor cost can be reduced.

[0167]

As described above, according to the present invention, in claim 1, the synthetic resin material is irradiated with ultraviolet rays to cause an ultraviolet ray-excited reaction to degasify the chlorine-based gas contained in the synthetic resin material. After that, the synthetic resin material is heated to pyrolyze it and the oil is collected, so that safe and efficient dechlorination gasification is performed instead of alkali agent administration, and it is special for heating furnaces etc. It is not necessary to take any anti-corrosion measures, the cost can be reduced, and the oil treatment efficiency can be improved.

According to the present invention, in claim 9, the time-dependent change in the amount of chlorine-based gas generated from the synthetic resin material due to the action of the thermal decomposition means is constantly detected, and the optimum time-based change information is used. Since the alkaline agent supply amount is calculated and the alkaline agent supply is controlled, there is no change in heating and decomposing synthetic resin materials into oil, but the optimum amount of alkaline agent is always administered to chlorine-based materials. It is possible to reliably prevent the generation of gas, further reduce the generation of residues after oilification, and obtain the effect of improving the oilification treatment efficiency.

According to the present invention, in claim 16, the synthetic resin material selected from the waste synthetic resin product is heated and melted and pressed into a sheet shape, and it is discriminated from the uneven state depending on the sheet thickness of the sheet-shaped synthetic resin material. It is equipped with a detecting means for detecting foreign matter and a detecting means for detecting foreign matter by judging from the cooling temperature distribution, and the detected foreign matter is cut and removed from the sheet-like synthetic resin material. As a pre-treatment for conversion, it is possible to reliably sort out foreign substances such as metal materials and paper mixed in this waste synthetic resin material, and remove the foreign substances, leading to more accurate and efficient oil treatment. Produce an effect.

[Brief description of drawings]

FIG. 1 is an oil treatment apparatus for waste synthetic resin material showing an embodiment of the first and second inventions.

FIG. 2 is an oil treatment device for waste synthetic resin material showing an embodiment of the third and fourth inventions.

FIG. 3 is an oil treatment apparatus for waste synthetic resin material showing an embodiment of the third and fifth inventions.

FIG. 4 is an oil treatment apparatus for waste synthetic resin material showing an embodiment of sixth and seventh inventions.

FIG. 5 is an oil treatment device for waste synthetic resin material showing an embodiment of the eighth invention.

FIG. 6 is a pretreatment device for waste synthetic resin products showing another embodiment.

[Explanation of symbols]

S ... Waste synthetic resin material, 2 ... Kneading machine, 3 ... Rolling machine, 5 ... Degassing chamber, 7 ... Ultraviolet light source, 8 ... Lens, 10 ... Chlorine gas detector, 21 ... Kneading / volume reducing machine, 22 Neutralization treatment furnace, 24 ... Alkaline agent container, 27 ... Chlorine-based gas concentration measuring instrument, 28 ... First control unit, 30 ... Pyrolysis heating furnace, 32 ...
Auxiliary alkaline agent container, 37 ... Chlorine gas concentration measuring device, 3
8 ... 2nd control part, 71 ... Press room, 73 ... Press machine,
78 ... Illuminator, 79 ... CCD camera, 80 ... Image recognizer, 81 ... Control part, 82 ... Radiation thermometer, 83 ... Temperature distribution recognizer, 84 ... Cutting machine.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C08J 11/00 ZAB

Claims (20)

[Claims] 1. An ultraviolet irradiation means for irradiating a synthetic resin material with ultraviolet rays to degas chlorine-based gas contained in the synthetic resin material, and a synthetic method for degassing chlorine-based gas by the ultraviolet irradiation means. An oil treatment apparatus for synthetic resin material, comprising: a thermal decomposition means for heating and thermally decomposing a resin material; and an oil recovery means for recovering oil from the synthetic resin material thermally decomposed by the thermal decomposition means. . 2. An apparatus for oil treatment of synthetic resin material according to claim 1, wherein said ultraviolet irradiation means is an ultraviolet laser oscillator for freely setting the ultraviolet wavelength and its wavelength band. 3. The synthetic resin material according to claim 1, wherein the ultraviolet irradiating means is provided with an optical system for enlarging an irradiation area of ultraviolet rays irradiated from an irradiation source and making irradiation energy uniform. Oil processing equipment. 4. The ultraviolet ray irradiating means is provided with one of means for irradiating the ultraviolet ray in a closed atmosphere and discarding and recovering the generated chlorine-based gas and means for detoxifying the chlorine-based gas. The synthetic resin material oil treatment apparatus according to claim 1. 5. The ultraviolet irradiation means comprises means for rolling the synthetic resin material into a thin sheet prior to the irradiation of the ultraviolet rays in order to make the ultraviolet irradiation of the synthetic resin material effective. 1. A synthetic resin material oil treatment apparatus according to 1. 6. The synthetic resin material according to claim 1, wherein the ultraviolet irradiation means comprises means for qualitatively and quantitatively measuring the amount of chlorine-based gas generated by the ultraviolet irradiation. Oil processing equipment. 7. A means for qualitatively and quantitatively measuring the amount of the chlorine-based gas is gas chromatograph, gas chromatograph mass spectrometer, gas chromatograph infrared spectroscopic analyzer, ultraviolet absorption spectrum analyzer, ion selective electrode device. 7. The synthetic resin material oil treatment apparatus according to claim 6, wherein the oil treatment apparatus is at least one of the above. 8. A kneading / volume-reducing step of kneading and reducing the volume of the input synthetic resin material, a rolling step of rolling the synthetic resin material into a thin sheet, and irradiating the sheet-shaped synthetic resin material with ultraviolet rays. Then, an ultraviolet irradiation step for performing chlorine-based degassing treatment contained in the synthetic resin material, and a thermal decomposition step for heating and thermally decomposing the chlorine-based degassed synthetic resin material by this ultraviolet irradiation means, And an oil recovery step of recovering oil from the synthetic resin material thermally decomposed in the thermal decomposition step. 9. A kneading / volume-reducing means for kneading and reducing the volume of the input synthetic resin material, a heat-decomposing means for heating and thermally decomposing the volume-reduced / kneaded synthetic resin material, and this thermal decomposition. Detection means for constantly detecting the time-dependent change in the amount of chlorine-based gas generated from the synthetic resin material due to the action of the means, and supplying the alkaline agent to the synthetic resin material heated by the thermal decomposition means to supply the alkaline agent Means, receiving a detection signal from the detection means, calculating an optimal alkali agent supply amount based on the time-dependent change information of the detected chlorine-based gas amount, and a control means for controlling the alkali agent supply means, An oil treatment device for a synthetic resin material, comprising: an oil recovery means for recovering oil from a molten synthetic resin material in which chlorine gas is neutralized by a thermal decomposition means. 10. The neutralization treatment furnace, wherein the thermal decomposition means heats and melts the volume-reduced and kneaded synthetic resin material, and neutralizes chlorine-based gas by administering the alkaline agent of the alkaline agent supply means. A pyrolysis heating furnace that further heats and thermally decomposes the synthetic resin material that has been heated and melted in the neutralization treatment furnace, and that neutralizes chlorine-based gas remaining in the synthetic resin material by administering the alkaline agent of the alkaline agent supply means. The oil treatment apparatus for synthetic resin material according to claim 9, further comprising: 11. The thermal decomposition means heats and melts the volume-reduced and kneaded synthetic resin material, and at the same time neutralizes the chlorine-based gas by administering the alkaline agent of the alkaline agent supply means, and the synthetic resin material. An oilification treatment apparatus for synthetic resin material according to claim 9, further comprising a pyrolysis heating furnace for thermally decomposing the resin. 12. A kneading / volume-reducing step of kneading and reducing the volume of an input synthetic resin material, and heating and melting the kneading / volume-reducing synthetic resin material, while supplying an alkaline agent. Neutralization step to neutralize the chlorine-based gas that is generated, and to further heat and heat the synthetic resin material that has been heated and melted for thermal decomposition, and to administer and supply an alkaline agent to neutralize the chlorine-based gas that remains in the synthetic resin material. It comprises a thermal decomposition step and an oil recovery step of recovering oil from the molten synthetic resin material in which the chlorine-based gas has been neutralized in this thermal decomposition step. At least one of the neutralization step and the thermal decomposition step The step is an oil treatment method for a synthetic resin material, characterized in that the amount of chlorine-based gas generated is constantly detected to control the amount of alkali agent supplied. 13. A kneading / volume-reducing step of kneading and reducing the volume of an input synthetic resin material, heating the volume-reducing / kneading synthetic resin material to melt and thermally decompose it, and administering an alkali agent. It comprises a thermal decomposition step of neutralizing the chlorine-based gas that is generated and supplied, and an oil recovery step of recovering oil from the molten synthetic resin material that has neutralized the chlorine-based gas in this thermal decomposition step. Is an oil treatment method for a synthetic resin material, which constantly detects the change with time of the amount of chlorine-based gas generation to control the supply amount of the alkaline agent. 14. A thermal decomposition means for heating and thermally decomposing a synthetic resin material, and a bubbling means for introducing gas generated from the synthetic resin material by the heating action of the thermal decomposition means and bubbling it into pure water. A water tank and a water tank that is installed in this water tank and constantly measures the pH value change of water.
An H meter and a control means for periodically and quantitatively calculating the amount of chlorine-based gas generated from the pH change value measured by the pH meter and controlling the pure water concentration based on the result. Oil treatment equipment for synthetic resin materials. 15. A pyrolysis step of heating and thermally decomposing a synthetic resin material, a bubbling step of introducing gas generated from the synthetic resin material along with the pyrolysis step, and bubbling into water, It consists of a detection process that constantly measures the change in pH value, and the amount of chlorine-based gas generated is calculated on a regular and quantitative basis from the measured pH change value, and the concentration of water is controlled based on the result. A method for oil treatment of a synthetic resin material, comprising: 16. A foreign matter is detected by discriminating from a pressing means for heating and melting a synthetic resin material selected from a waste synthetic resin product and pressing it into a sheet shape, and a concavo-convex state depending on the sheet thickness of the sheet-shaped synthetic resin material. To detect foreign matter by determining from the cooling temperature distribution of the sheet-shaped synthetic resin material, and the foreign matter detected by the first and second detecting means. A removing means for cutting and removing from the sheet-like synthetic resin material, and an oiling means for heating and thermally decomposing the sheet-like synthetic resin material in which foreign matter is detected by the removing means, and condensing vaporized gas to recover oil. An oil treatment device for synthetic resin material, which is characterized by being provided. 17. The liquefaction of the synthetic resin material according to claim 16, wherein the pressing means sets the heating temperature for the synthetic resin material to be equal to or higher than the plasticizing temperature of the synthetic resin material and equal to or lower than the decomposition temperature. Processing equipment. 18. The first detecting means illuminates the surface of the sheet-shaped synthetic resin material, and images the bright and dark state due to the unevenness of the surface due to the illumination light, and performs foreign matter identification by image processing, and A means for recognizing the position is provided.
6. A synthetic resin material oil treatment apparatus according to 6. 19. The radiation thermometer for measuring the cooling temperature distribution after sheet-like molding, which is caused by the difference in thermal conductivity between the synthetic resin material and the foreign matter, as the second detecting means. An oil treatment device for the described synthetic resin material. 20. A synthetic resin material, which is heated and melted by the pressing means and pressed into a sheet shape, is a means for partially recognizing the shape of a waste synthetic resin product by image processing, and the respective parts based on the shape recognition. 17. The synthetic resin material according to claim 16, wherein the synthetic resin material is selected in a pretreatment section equipped with a means for cutting and a means for selecting each of the cut parts for oil treatment and for non-oil treatment. Oil treatment equipment.