JP3119501U - Waste plastic material decomposition processing equipment - Google Patents

Abstract

[PROBLEMS] To dispose of waste plastic material from a supply port of vaporized oil component produced in a heating furnace when waste plastic material is sequentially supplied from the supply port during operation to continuously operate the plastics. An apparatus for decomposing waste plastic material that effectively suppresses eruption of oil and converts it to oils and fats that enable continuous operation is provided.
In a decomposition apparatus for waste plastic material, a supply device 2 for supplying an object to be processed to a heating furnace 1 is constituted by a cylindrical conveying cylinder 22 and a spiral blade stored in the conveying cylinder 22. A workpiece 23 received from one end side is formed in a conveyor 23 that pushes and transfers the workpiece to the other end side, and the base end side of the connection tube 24 is airtightly connected to the other end side of the transfer tube 22. The tip end side of the heating tube 1 is connected to the supply port 15 of the heating furnace 1 in an airtight manner, and the workpiece to be pushed into the connecting cylinder 24 is scraped out and fed out toward the tip end side of the connecting cylinder 24. The feeding mechanism C was incorporated.
[Selection] Figure 4

Description

  The present invention introduces waste plastic material into a heating furnace, decomposes it into oil and fat components and carbon by heat treatment, extracts the vaporized gas of oil and fat components, extracts oil and fats that can be reused by cooling with a cooling device. The present invention relates to an improvement of a decomposition processing apparatus for waste plastic material to be converted and reduced.

  The decomposition processing means that puts the waste plastic material into the heating furnace and converts it into a material that can be reused by being decomposed by heating. In addition, when supplying the waste plastic material into the heating furnace, a decomposition accelerator such as sodium phthalate or sodium stearate is added and added, and under the addition of this decomposition accelerator, 500 ° C. Heat to a high temperature of C to 800 degrees C to decompose and melt the molecular structure of the waste plastic material, thereby converting it into a liquefied oil and fat component, which is removed from the heating furnace and has a different melting point by fractional distillation Each oil is separated and refined to obtain a reusable substance such as naphtha.

  This means is that the temperature in the heating furnace is maintained at a high temperature of 500 ° C. to 800 ° C. in order to melt the waste plastic material charged in the heating furnace. There is a problem that costs increase.

  From this, the applicant of the present application is combusted by heating the waste plastic material put into the heating furnace at a temperature of about 250 ° C. to 350 ° C. in a state where the inside of the heating furnace is sealed against the outside air. Without heating, the plastic material is decomposed into the oil and fat components that compose it, and the vaporized gas is taken out from the heating furnace through the vaporized gas take-out pipe and led to the cooling device to be cooled to obtain the fats and oils. Means for reduction has been developed as disclosed in Japanese Patent Application Laid-Open No. 2004-168806.

  This means, like the above-described conventional means, is a method in which the waste plastic material is charged into the heating furnace in a batch manner, and there is a problem that continuous operation cannot be performed. In addition, the heating furnace is sealed, and the waste plastic material thrown into the heating furnace is heated to a steamed state without burning, and the generated vaporized gas is taken out by the vaporized gas take-out pipe and led to the cooling device for cooling. Since it is reduced to fats and oils, the waste plastic material must be released when the waste plastic material is put into the heating furnace. There is a problem that is preventing you.

The waste plastic material decomposition treatment apparatus of the above-described form is a cylinder or drum that lies on its side with a cylinder whose cylindrical wall is cylindrical or polygonal and a side wall that closes both axial ends thereof. A supply port is opened on the upper surface side on one end side of the tube, and a discharge port is opened on the bottom portion on the other end side. A shaft along the axial direction is formed inside the cylindrical heating furnace. A spiral agitator that rotates around the core wire is pivotally supported, and the waste plastic material to be processed that is fed from the supply port on one end side is moved toward the discharge port on the other end side by the rotational operation of this spiral agitator. If this is done, continuous operation is possible by continuously supplying the waste plastic material to be processed from the supply port. However, the waste plastic material is decomposed into oil and fat components in the heating furnace by heat treatment of the input waste plastic material. The vaporized gas of the fat and oil component that vaporizes As the generated vaporized gas is ejected to the outside from the supply port, the vaporized gas is led to the cooling device through the vaporized gas take-out pipe and cooled for oily reduction. The gas is lost, and in reality, the oil reduction by the decomposition process becomes impossible.
JP 2004-168806 A

  The problem to be solved in the present invention is to take out the waste plastic material into the heating furnace, decompose the waste plastic material into oil and fat components by operating the heating furnace, and extract the vaporized gas connected to the heating furnace. When the waste plastic material is sequentially supplied from the supply port during the operation of the heating furnace in order to continuously operate the decomposition process of the waste plastic material in the heating furnace that is led to the cooling device by the pipe and cooled and oiled and reduced The waste plastic material decomposition treatment device that enables continuous operation by effectively suppressing the vaporization of the oil and fat components generated by the decomposition of the waste plastic material in the heating furnace from the supply port. It is in.

In the present invention, as means for solving the above-mentioned problems, as described in claim 1,
A sideways cylindrical furnace body 12 comprising a cylindrical body peripheral wall 10 and side walls 11 and 11 closing both axial ends thereof is formed, and a heater a is installed on the outer periphery of the body peripheral wall 10 Then, the outer peripheral side thereof is coated with a heat insulating material b to form a heating furnace 1, and the heating furnace 1 includes a workpiece supply device 2 connected to a supply port 15 provided at an upper portion on one end side, and A residue discharge device 6 connected to a discharge port 14 provided at the bottom on the other end side and a vaporized gas extraction pipe 4 for extracting vaporized gas generated by thermal decomposition of the supplied object to be processed are connected and provided inside. In a decomposition apparatus for waste plastic material, in which a spiral agitator 13 for moving an object to be processed from one end side to the other end is pivotally supported and the vaporized gas take-out pipe 4 is connected to a cooling device 5. The supply device 2 for supplying the workpiece to the furnace 1 is connected to one end of the cylindrical wall. From the receiving port 22a on one end side by a cylindrical transport tube 22 having an opening 22a and a discharge port 22b on the other end, and a spiral blade stored in the transport tube 22 so as to rotate coaxially. Formed in the conveyor 23 that pushes and transfers the received workpiece to the other end side, and connects the base end side of the connecting cylinder 24 to the discharge port 22b provided on the other end side of the conveying cylinder 22 in an airtight manner, The distal end side of the connection tube 24 is airtightly connected to the supply port 15 of the heating furnace 1, and the workpiece to be pushed into the portion facing the discharge port 22 b on the proximal end side in the connection tube 24. An apparatus for disassembling waste plastic material, which incorporates a gear-like feeding mechanism c that is scraped out by rotation and fed toward the distal end side of the connecting cylinder 24. and,
A sideways cylindrical furnace body 12 comprising a cylindrical body peripheral wall 10 and side walls 11 and 11 closing both axial ends thereof is formed, and a heater a is installed on the outer periphery of the body peripheral wall 10 Then, the outer peripheral side thereof is coated with a heat insulating material b to form a heating furnace 1, and the heating furnace 1 includes a workpiece supply device 2 connected to a supply port 15 provided at an upper portion on one end side, and A residue discharge device 6 connected to a discharge port 14 provided at the bottom on the other end side and a vaporized gas extraction pipe 4 for extracting vaporized gas generated by thermal decomposition of the supplied object to be processed are connected and provided inside. In a decomposition apparatus for waste plastic material, in which a spiral agitator 13 for moving an object to be processed from one end side to the other end is pivotally supported and the vaporized gas take-out pipe 4 is connected to a cooling device 5. The supply device 2 for supplying the workpiece to the furnace 1 is connected to one end of the cylindrical wall. One end side is formed by a cylindrical conveyance cylinder 22 having an opening 22a opened and a discharge port 22b opened on the other end, and a piston p reciprocating in the conveyance cylinder 22 across the reception opening 22a in the axial direction. Formed on the conveyor 23 that pushes and transfers the workpiece received from the receiving port 22a toward the other end side, and the base end side of the connecting cylinder 24 is hermetically sealed to the discharge port 22b provided on the other end side of the conveying cylinder 22 And the tip end side of the connecting cylinder 24 is airtightly connected to the supply port 15 of the heating furnace 1 and is pushed into the portion facing the discharge port 22b on the base end side in the connecting cylinder 24. An apparatus for disassembling a waste plastic material, which incorporates a gear-like feeding mechanism c that scrapes the workpiece to be treated by rotation and feeds it toward the tip end side of the connecting cylinder 24.
Is to raise.

  The apparatus for decomposing waste plastic material according to the present invention comprises a heating furnace formed in a cylindrical or polygonal tube shape, and a supply port is provided at the upper part on one end side in the axial direction of the heating furnace. A waste agitator that moves the waste plastic material of the workpiece that has been input from the supply port on one end side to the discharge port side on the other end side is pivotally supported. The supply of plastic material to the heating furnace can be performed continuously, and a conveyor that transports the workpiece to be pushed into the supply port and a gear-shaped feeding mechanism that scrapes the workpiece to be pushed in are connected to the supply port. Then, since the feed port that is held in a state of being blocked by the object to be packed is sequentially fed into the heating furnace, the vaporized gas generated in the heating furnace is fed from the supply port. Continuous operation without erupting It becomes so that.

  In the implementation of the means of the present invention, the heating furnace formed into a horizontal cylinder need not be formed into a regular cylinder, but formed into a polygonal cylinder or a cross-sectional shape in which the bottom side is a semi-cylindrical shape and the upper side is a square cylinder shape For example, the helical agitator that is pivotally supported in the interior does not hinder the operation of moving the object to be processed introduced from the supply port on one end side toward the discharge port on the other end side. In the range, it may be formed in an appropriate cross-sectional shape.

  In addition, the supply device of the object to be processed connected to the supply port pushes the object to be supplied in the transfer direction, so that the object to be processed is packed in the terminal side in the transfer direction and closes the supply. In addition, the present invention is not limited to the combination of the transport cylinder and the spiral stored therein, and may be configured to combine the cylinder and the piston that reciprocates inside thereof.

Next, an apparatus for decomposing waste plastic material that implements the inventive means will be described in detail with reference to the drawings.
FIG. 1 is a front view of an entire waste plastic material decomposition treatment apparatus A according to the means of the present invention, FIG. 2 is a left side view of the same, FIG. 3 is a right side view of the same, and FIG. FIG. 5 is a longitudinal side view of the heating furnace, FIG. 6 is a longitudinal front view of the heating furnace, and FIG. 7 is a longitudinal front view of another embodiment of the supply apparatus. In these drawings, 1 is the heating furnace. In this example, the cylindrical peripheral wall 10 is formed in a cylindrical shape with the axial direction being the left-right direction, and a heater a is wound around the outer peripheral surface of the cylindrical peripheral wall 10, and a heat insulating material b is provided on the outer periphery thereof. It is wound around multiple layers, and the left and right side ends are closed by side walls 11 and 11, respectively.

  Further, on the inner surface of the barrel peripheral wall 10 and the inner surfaces of the side walls 11 and 11, a panel made of granite natural stone or a ceramic panel m which is granulated from granite natural stone and fired by mixing fireproof cement and water or castable Is stretched all over.

  As shown in FIGS. 1 to 3, the heating furnace 1 is fixedly mounted on a machine frame F by a support 1 a, and a shaft is mounted on the machine frame F at an axial center portion of the inner cavity thereof. As shown in FIG. 4, a spiral agitator that is rotated by driving and rotating the rotating shaft S by the operation of the motor M1, as shown in FIG. 13 is attached.

  2 is a supply device for supplying waste plastic material into the heating furnace 1, a hopper 20, a transport cylinder 22 connected to a lower opening 21 of the hopper 20, and a receiving port 22 a opened in a cylinder wall, and the transport cylinder 22 Of the conveying cylinder 22 connected to the lower port 21 from the lower port 21 thereof, which is inserted into the hopper 20 and includes a spiral conveyor 23 that can be mounted on the storage shaft and a motor M2 that drives the conveyor 23. Waste plastic material fed to the transfer cylinder 22 through the receiving port 22a opened on the upper surface side of the cylinder wall is moved to the other end side (front end side) of the transfer cylinder 22 by the operation of the conveyor 23 driven by the motor M2. The paper is pumped so as to be pushed in, and is packed in the other end side in the transport cylinder 22.

  And the discharge port 22b is opened in the lower surface side in the front end side of the cylinder wall of the conveyance cylinder 22, The lower end side connects the upper end side of the connection cylinder 24 connected to the supply port 15 provided in the heating furnace 1 here. A drum-shaped bulging portion 240 formed at the upper end of the connection cylinder 24 is provided at a position facing the lower surface of the discharge port 22b on the upper end side in the connection cylinder 24 while maintaining airtightness. Inside, the impeller-like scraping wheel 25 that rotates coaxially with the axial center line of the bulging portion 240 is arranged such that the tip side of the scraping plate 251 that radially protrudes from the rotating shaft 250 is the inner wall surface of the bulging portion 240. A feeding mechanism c that is pivotally supported so as to rotate in sliding contact is installed, and the scraping wheel 25 is rotated by driving of a motor (not shown) so that the feeding mechanism c is connected to the connecting cylinder. 24, the discharge port 22 b of the transport cylinder 22 and the supply port 15 of the heating furnace 1. In the state where the communication between them is cut off in the form of a rotary valve, the scraping plate 251 of the rotating scraping wheel 25 is pressure-fed toward the other end side in the conveying cylinder 22 by the operation of the conveyor 23, and the other end side. The waste plastic material that has come to be packed in is scraped out so as to be sequentially cut out and fed to the lower end side of the connection tube 24, and the fed out waste plastic material is fed into the heating furnace 1 from the supply port 15. It is like that.

  Thus, when supplying the waste plastic material to the heating furnace 1 when the heating furnace 1 is in operation, the vaporized gas generated in the heating furnace 1 is ejected from the supply port 15. This makes it possible to continuously supply waste plastic materials.

  Further, the supply device 2 is configured so that the waste plastic material supplied into the heating furnace 1 can be fed in a wet state in which the plastic material is washed with water and not drained or dried. The waste plastic material is also used as a hydration means for adding water into the heating furnace 1.

  3 is an additive supply device for supplying a sodium-based catalyst into the heating furnace 1, a hopper 30, a quantitative feeding mechanism 31 for cutting out the catalyst charged into the hopper 30 to a predetermined amount, and cutting The lower end side of the transfer cylinder 32 is connected to an intermediate portion in the transfer direction of the transfer cylinder 22 of the supply device 2, and the catalyst to be added is supplied to the supply device 2. The waste plastic material is fed into the heating furnace 1 together with the waste plastic material.

  4 is a vaporized gas extraction pipe for extracting the vaporized gas generated by decomposition by the heat treatment from the waste plastic material put into the heating furnace 1 and leading it to the cooling device 5, which communicates with the lumen of the heating furnace 1. As shown in FIG. 5, the connecting port 40 is opened at a portion that is inclined at an angle α of about 30 degrees with respect to the upper and lower center line X passing through the axial center position of the trunk peripheral wall 10. The chlorine generated from the vaporized gas generated from the waste plastic material, the vaporized gas generated from the waste plastic material, and the vinyl chloride material mixed in the waste plastic material on the ceiling of the furnace 1 A space is formed so that the gas, the sodium gas generated from the sodium-based catalyst supplied into the heating furnace 1 and the water vapor gas generated from the supplied water are mixed. It is.

  5 is a cooling device for cooling the vaporized gas extracted by the vaporized gas take-out pipe 4, an airtightly formed cooling box 50, a radiator-like heat exchanger 51 disposed in the inside thereof, This is constituted by a cooling water tank 52 for storing cooling water cooled by a circulating refrigerator, and a pump P1 for circulating the cooling water in the tank 52 to the heat exchanger 51, and a cooling box for the cooling water tank 52. 50, below the heat exchanger 51, a receptacle 53 for receiving a fat and oil component that is condensed and oiled by cooling is formed in a tray shape and disposed at the bottom of the receptacle 53. The oil discharge pipe 54 which discharges the stored oil and fat components is connected via the valve V1, and the recovery tank t1 is connected to the tip.

  In the receiver 53, water condensated from the water vapor generated from the water hydrolyzed in the heating furnace 1 and introduced into the cooling box 50 through the vaporized gas take-out pipe 4 together with the vaporized gas is the oil described above. It is stored together with the oil and fat components.

  The chlorine gas generated in the heating furnace 1 and the sodium gas generated from the added sodium-based catalyst hardly react and bond at a high temperature, but are cooled by the vaporized gas extraction pipe 4. When the temperature drops to about 200 ° C. due to a temperature drop while being introduced into the apparatus 5, the reaction starts to bond with each other and is fixed as salt (NaCl), which is fixed in the cooling box 50 of the cooling apparatus 3. Inside, it is dissolved in the water cooled and condensed by the heat exchanger 51, becomes salt water, and is stored in the aforementioned receiver 53. The oil and fat component is separated into two layers and stays in the lower layer. And the water discharge pipe 55 which takes out this lower layer salt water is connected to the bottom face side of the receiver 53 via valve | bulb V2, and the salt water tank t2 is connected to the lower end side thereof.

  6 is a residue discharge device for discharging a residue mainly made of carbon generated in the heating furnace 1, and is connected to the residue discharge port 14 provided at the bottom of the other end side of the heating furnace 1 and the residue discharge port 14. A discharge pipe 60 provided in the upper end portion of the discharge pipe 60 facing the residue discharge port 14, and a drum-shaped bulging portion 601 having a transverse direction in the axial direction, and a lumen of the bulging portion 601. The tip end side of the scraping plate 62 that is arranged so as to rotate in the shape of an impeller by a rotary shaft 61 coaxial with the axis of the shaft core and that projects radially from the rotary shaft 61 is the inner surface of the wall of the bulging portion 601. A scraping wheel 63 pivotally supported so as to rotate and a residue take-out bin 64 provided to be connected to the lower end side of the discharge pipe 60, and by a spiral agitator 13 disposed in the heating furnace 1, Deposited at the bottom of the heating furnace 1 and transferred to the other end of the heating furnace 1 The accumulated carbon-based residue is scraped out by a scraping wheel 63 that closes the outlet 14 of the heating furnace 1 in the form of a valve shutter and is rotated by the operation of a motor (not shown). Then, it is introduced into the residue extraction bin 64 through the discharge pipe 60 and accumulated there.

  In this example, the residue take-out bin 64 is surrounded by a cooler 65 made of a water jacket, and the cooling water in the cold water tank 52 cooled by the cooler of the cooling device 5 is included therein. Is circulated by the pump P2, and most of the carbon recovered in the residue take-out bin 64 is cooled and kept airtight, and heat in a state where the carbon residue is in contact with air. To prevent the explosion of dust caused by the synergy.

  The residue take-out bin 64 for collecting the residue is provided with a take-out port 66 for discharging the cooled residue at the bottom, and the pressure generated in the residue take-out bin 64 is also ejected to the take-out port 66. A shutter 67 for preventing this is provided so as to be openable and closable, and the shutter 67 is opened so that the cooled residue is taken out by a normal conveyor 68.

  FIG. 7 shows another embodiment. This example shows a modification of the supply device 2 for supplying waste plastic material to be processed from the supply port 15 of the heating furnace 1, and the waste plastic material charged into the hopper 20 is directed toward the end side of the conveying cylinder 22. This is an example in which a screw auger-like conveyor 23 that operates so as to be pushed in is formed in a cylinder shape on which a piston p that reciprocates by the operation of a motor M2 slides.

  The piston p, which is slidably inserted in the transfer cylinder 22 formed in the cylinder, is connected to the distal end side of the reciprocating pitman rod 26, and the proximal end side of the rod 26 is connected to a crank wheel 27 rotated by a motor M2. Waste plastic material which is connected to the provided crankpin 28 and reciprocates in the conveying cylinder 22 by the rotation of the crank wheel 27 and thereby falls into the conveying cylinder 22 from the lower port 21 of the hopper 20. Are sequentially pushed into the front end side in the conveying cylinder 22. Thereby, the waste plastic material packed in the front end side in the transport cylinder 22 is fed from the discharge port 22b opened on the lower surface side of the cylinder wall of the transport cylinder 22 to the lower surface side of the feeding mechanism c. It is the same as that shown in the first embodiment that it is fed to the supply port 15 of the heating furnace 1 through the connection tube 24 by the operation of.

It is a front view of the whole decomposition processing apparatus of the waste plastic material which implements this invention. It is a left view of an apparatus same as the above. It is a right view of an apparatus same as the above. FIG. It is a vertical side view of the heating furnace of an apparatus same as the above. It is a vertical front view of the heating furnace of an apparatus same as the above. It is a vertical front view of the principal part of another Example of an apparatus same as the above.

Explanation of symbols

  A ... Waste plastic material decomposition processing device, F ... Machine frame, M1, M2, M3 ... Motor, P1, P2 ... Pump, S ... Rotary shaft, V1 / V2 ... Valve, a ... Heater, b ... Heat insulation, c DESCRIPTION OF SYMBOLS ... Feeding mechanism, m ... Ceramic panel, p ... Piston, t1 Recovery tank, 1 ... Heating furnace, 1a ... Support, 10 ... Peripheral wall, 11 ... Side wall, 12 ... Main body, 13 ... Agitator, 14 ... Residue discharge port, DESCRIPTION OF SYMBOLS 15 ... Supply port, 2 ... Supply apparatus, 20 ... Hopper, 21 ... Lower port, 22 ... Conveyance cylinder, 22a ... Reception port, 22b ... Discharge port, 23 ... Conveyor, 24 ... Connection cylinder, 240 ... Swelling part, 25 ... scraping wheel, 250 ... rotating shaft, 251 ... scraping plate, 26 ... pitman rod, 27 ... crank wheel, 28 ... crank pin, 3 ... additive supply device, 30 ... hopper, 31 ... quantitative feeding mechanism, 32 ... conveying cylinder, 4 ... vaporized gas Outlet pipe, 40 ... connection port, 5 ... cooling device, 50 ... cooling box, 51 ... heat exchanger, 52 ... cooling water tank, 53 ... receiver, 54 ... oil discharge pipe, 55 ... water discharge pipe, 6 ... residue Discharge device, 60 ... discharge pipe, 601 ... swollen part, 61 ... rotating shaft, 62 ... scraping plate, 63 ... scraping wheel, 64 ... residue take-out bin, 65 ... cooler, 66 ... take-out port, 67 ... shutter , 68 ... conveyor.

Claims (3)

  A sideways cylindrical furnace body 12 comprising a cylindrical body peripheral wall 10 and side walls 11 and 11 closing both axial ends thereof is formed, and a heater a is installed on the outer periphery of the body peripheral wall 10 Then, the outer peripheral side thereof is coated with a heat insulating material b to form a heating furnace 1, and the heating furnace 1 includes a workpiece supply device 2 connected to a supply port 15 provided at an upper portion on one end side, and A residue discharge device 6 connected to a discharge port 14 provided at the bottom on the other end side and a vaporized gas extraction pipe 4 for extracting vaporized gas generated by thermal decomposition of the supplied object to be processed are connected and provided inside. In a decomposition apparatus for waste plastic material, in which a spiral agitator 13 for moving an object to be processed from one end side to the other end is pivotally supported and the vaporized gas take-out pipe 4 is connected to a cooling device 5. The supply device 2 for supplying the workpiece to the furnace 1 is connected to one end of the cylindrical wall. From the receiving port 22a on one end side by a cylindrical transport tube 22 having an opening 22a and a discharge port 22b on the other end, and a spiral blade stored in the transport tube 22 so as to rotate coaxially. Formed in the conveyor 23 that pushes and transfers the received workpiece to the other end side, and connects the base end side of the connecting cylinder 24 to the discharge port 22b provided on the other end side of the conveying cylinder 22 in an airtight manner, The distal end side of the connection tube 24 is airtightly connected to the supply port 15 of the heating furnace 1, and the workpiece to be pushed into the portion facing the discharge port 22 b on the proximal end side in the connection tube 24. An apparatus for disassembling waste plastic material, which incorporates a gear-like feeding mechanism c that is scraped out by rotation and fed toward the distal end side of the connecting cylinder 24.   A sideways cylindrical furnace body 12 comprising a cylindrical body peripheral wall 10 and side walls 11 and 11 closing both axial ends thereof is formed, and a heater a is installed on the outer periphery of the body peripheral wall 10 Then, the outer peripheral side thereof is coated with a heat insulating material b to form a heating furnace 1, and the heating furnace 1 includes a workpiece supply device 2 connected to a supply port 15 provided at an upper portion on one end side, and A residue discharge device 6 connected to a discharge port 14 provided at the bottom on the other end side and a vaporized gas extraction pipe 4 for extracting vaporized gas generated by thermal decomposition of the supplied object to be processed are connected and provided inside. In a decomposition apparatus for waste plastic material, in which a spiral agitator 13 for moving an object to be processed from one end side to the other end is pivotally supported and the vaporized gas take-out pipe 4 is connected to a cooling device 5. The supply device 2 for supplying the workpiece to the furnace 1 is connected to one end of the cylindrical wall. One end side is formed by a cylindrical conveyance cylinder 22 having an opening 22a opened and a discharge port 22b opened on the other end, and a piston p reciprocating in the conveyance cylinder 22 across the reception opening 22a in the axial direction. Formed on the conveyor 23 that pushes and transfers the workpiece received from the receiving port 22a toward the other end side, and the base end side of the connecting cylinder 24 is hermetically sealed to the discharge port 22b provided on the other end side of the conveying cylinder 22 And the tip end side of the connecting cylinder 24 is airtightly connected to the supply port 15 of the heating furnace 1 and is pushed into the portion facing the discharge port 22b on the base end side in the connecting cylinder 24. An apparatus for disassembling a waste plastic material, which incorporates a gear-like feeding mechanism c that scrapes the workpiece to be treated by rotation and feeds it toward the tip end side of the connecting cylinder 24.   The lower end of the supply hopper 30 of the supply device 3 for the additive such as a sodium-based catalyst is connected to the transport cylinder 22 of the supply device 2 via a feeding mechanism 31. Decomposition processing equipment for waste plastic materials as described.

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