Carbonization and oilification apparatus

Abstract

To provide a carbonization and oilification apparatus capable of efficiently carbonizing and oilifying waste plastic with a simple configuration without separating the waste plastic to be carbonized and oilified into polyethylene terephthalate and other types.SOLUTION: A carbonization and oilification apparatus comprises: a heating furnace 1 that generates vaporized gas G1 by heating waste plastic; a catalyst tank 2 that promotes decomposition of the vaporized gas G1 derived from the heating furnace 1; a condenser 3 that cools and liquefies decomposition gas G2 supplied from the catalyst tank 2; and an oil recovery part 4 that recovers an oil content in an oil-water component Y liquefied by the condenser 3. A supply pipe 5 that supplies the decomposition gas G2 to the condenser 3 is provided with: an inclined part 51 which is inclined such that a downstream side is positioned above an upstream side; and a heating part 54 that heats a jelly-like body Z, which has accumulated due to condensation of a sublimable substance in the decomposition gas G2 in the inclined part 51, to enhance the fluidity and reflux the same into the catalyst tank 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a carbonization-to-oil apparatus that heats and carbonizes waste plastics, such as PET bottles and other plastic waste products, into oil. [Background technology]

[0002] Conventionally, waste plastics, such as PET bottles and other plastic products, have been disposed of by landfilling or incineration. However, from the perspective of environmental considerations and the effective utilization of resources, attention has been focused on carbonization-to-oil systems that thermally decompose waste plastics and gasify them, and then cool the decomposition gas to convert it into oil for reuse. Generally, thermoplastic plastics, such as polystyrene, polypropylene, polycarbonate, and polyethylene, can be efficiently converted into oil. However, polyethylene terephthalate, which is the raw material for PET bottles and other products that have been consumed in large quantities in recent years, contains terephthalic acid, a sublimable substance (the property of directly converting a solid into a gas), as its main component. However, when cooled to 300°C or below, terephthalic acid condenses and crystallizes, posing a problem of easily clogging pipes.

[0003] Therefore, among waste plastic carbonization-to-oil systems (oil reduction systems) equipped with a thermal decomposition tank that heats and pyrolyzes waste plastics and cools the generated decomposition gas to convert it into oil, there is known a system that includes a terephthalic acid decomposition unit that heats the terephthalic acid generated during the pyrolysis of polyethylene terephthalate molded products to 300°C or higher and brings it into contact with a catalyst using an acid or a base to obtain decomposition products of benzene, benzoic acid, and carbon dioxide (see, for example, Patent Document 1).

[0004] In the carbonization-to-oil apparatus described above, when waste plastics such as PET bottles made of polyethylene terephthalate molded products are carbonized to oil, the decomposition gas is supplied to a terephthalic acid decomposition apparatus to be decomposed into benzene, benzoic acid, and carbon dioxide, and then supplied to a condenser to be converted to oil, thereby preventing clogging of the pipelines. On the other hand, when waste plastics not containing polyethylene terephthalate molded products are processed, the decomposition gas is directly supplied to a condenser to be converted to oil. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-96469 Summary of the Invention [Problem to be solved by the invention]

[0006] In the carbonization-to-oil apparatus disclosed in Patent Document 1, waste plastics pyrolyzed in a thermal decomposition tank must be separated into polyethylene terephthalate molded products and other materials, such as polystyrene and polypropylene. Moreover, two routes must be provided, one for treating polyethylene terephthalate molded products and the other for treating other materials, and a switching valve must be operated to switch between the two routes depending on the type of waste plastic to be pyrolyzed, making it difficult to efficiently carbonize waste plastics made up of various materials into oil.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a carbonization-to-oil device that does not require separating the waste plastic to be thermally decomposed into polyethylene terephthalate and other components, prevents the inconvenience of clogging the pipes, and can efficiently carbonize waste plastic into oil with a simple configuration. [Means for solving the problem]

[0008] The present invention is a carbonization-to-oil device comprising a heating furnace that generates vaporized gas by heating waste plastic, a catalyst tank that promotes the decomposition of the vaporized gas derived from the heating furnace, a condenser that cools and liquefies the decomposition gas supplied from the catalyst tank, and an oil recovery unit that recovers the oil from the oil-water components liquefied by the condenser, wherein the supply pipe that supplies the decomposition gas to the condenser is provided with an inclined section that is inclined so that the downstream side is positioned higher than the upstream side, and a heating section that heats the jelly-like material that has accumulated in the inclined section due to condensation of sublimable substances in the decomposition gas, increases its fluidity, and returns it to the catalyst tank.

[0009] Here, it is preferable that the supply pipe is provided with a detection means for detecting that the jelly-like material has accumulated in the inclined portion.

[0010] Here, it is preferable that a discharge pipe be provided at the bottom of the catalyst tank for discharging the jelly-like material returned from the inclined portion to the catalyst tank.

[0011] Here, it is preferable to provide a reheating section that reheats the jelly-like material that has been refluxed into the catalyst tank to increase its fluidity and cause it to flow down into the discharge pipe, and an on-off valve that opens and closes the discharge pipe.

[0012] Here, the exhaust pipe may be provided with a U-shaped trap portion that restricts air from flowing from the downstream side to the upstream side.

[0013] Here, for one heating furnace, multiple catalyst tanks and inclined portions, and multiple processing lines that supply the vaporized gas to each of the catalyst tanks may be provided, and a switching valve may be provided to switch the supply direction of the vaporized gas through the processing lines.

[0014] Here, it is preferable to provide a control means for controlling the switching valve to switch the supply direction of the vaporized gas when the operating time of the carbonization-to-oil apparatus reaches a certain time.

[0015] Here, the configuration may include multiple detection means for detecting that the jelly-like material has accumulated in each of the inclined sections, and a control means for operating the switching valve to switch the supply direction of the vaporized gas from one side of the processing line to the other side when it is detected that the jelly-like material has accumulated in the inclined section of one of the processing lines in accordance with the detection signal from the detection means. [Effects of the Invention]

[0016] The present invention provides a supply pipe that supplies the decomposition gas drawn out from the catalyst tank to the condenser with an inclined section that is inclined so that the downstream side is positioned higher than the upstream side, and when a jelly-like material formed by sublimable substances in the decomposition gas mixed with oil or the like accumulates in the inclined section, it is heated in a heating section to increase the fluidity of the jelly-like material and cause it to flow back into the catalyst tank. This eliminates the need for the cumbersome task of separating the waste plastic being processed into polyethylene terephthalate and other materials, or for a complex structure that allows the supply paths for both to be switched, and effectively prevents the inconvenience of the jelly-like material completely blocking the pipeline, and makes it possible to efficiently carbonize waste plastic into oil.

[0017] Furthermore, if the detection means is configured to detect that the jelly-like material has accumulated in the inclined portion of the supply pipe, it is possible to execute control to heat the jelly-like material and return it to the catalyst tank at the appropriate timing, which has the advantage of reliably preventing the inconvenience of the pipe becoming clogged without having to frequently stop the carbonization treatment device.

[0018] Furthermore, by providing a discharge pipe at the bottom of the catalyst tank to discharge the jelly-like material that has been returned to the catalyst tank from the inclined portion, the jelly-like material in the catalyst tank can be appropriately discharged to the outside, thereby preventing a large amount of jelly-like material from remaining in the catalyst tank and impairing the catalyst tank's ability to promote the decomposition of vaporized gas.

[0019] Furthermore, in a configuration including a reheating unit that heats the jelly-like material returned to the catalyst tank to increase its fluidity and cause it to flow down the discharge pipe, and an on-off valve that opens and closes the discharge pipe, when a certain amount of jelly-like material has accumulated in the catalyst tank, the jelly-like material can be reheated by the reheating unit and the on-off valve can be opened to appropriately discharge the jelly-like material from the catalyst tank. This has the advantage of preventing a large amount of jelly-like material from accumulating in the catalyst tank, and also preventing air from being mixed into the catalyst tank via the discharge pipe by closing the on-off valve when a small amount of jelly-like material remains in the discharge pipe.

[0020] Furthermore, by providing a U-shaped trap section in the discharge pipe that prevents air from flowing from the downstream side to the upstream side, the jelly-like material accumulated in the catalyst tank can be discharged sequentially without the need to open and close the on-off valve at the appropriate timing as described above, and the trap section can prevent air from flowing back into the catalyst tank.

[0021] Furthermore, in a configuration in which multiple catalyst tanks and inclined sections and multiple treatment lines are provided for one heating furnace and the supply direction of the vaporized gas through the treatment lines is switched by a switching valve, when a jelly-like material accumulates in the inclined section of one treatment line, the operation state using one treatment line can be switched to an operation state using the other treatment line. This makes it possible to return the jelly-like material accumulated in the inclined section of one treatment line to the catalyst tank and remove it while continuing the operation of each carbonization-to-oil device.

[0022] Furthermore, if the control means is configured to operate the switching valve to switch the supply direction of the vaporized gas from one side of the processing line to the other side when the operating time of the carbonization-to-oil apparatus reaches a certain time, the operating state of the carbonization-to-oil apparatus can be continued for a certain time, and by periodically operating the switching valve to automatically switch the processing line for the vaporized gas, the operating state of the carbonization-to-oil apparatus can be continued while the jelly-like material that has accumulated in the inclined portion of one of the processing lines is returned to the catalyst tank and removed.

[0023] Furthermore, if the control means is configured to operate a switching valve to switch the supply direction of the vaporized gas from one side of the processing line to the other side when it confirms that a jelly-like material has accumulated in the inclined portion in response to the detection signal from the detection means, the switching control of the processing line can be executed at an appropriate timing, and the jelly-like material accumulated in the inclined portion of one of the processing lines can be returned to the catalyst tank and removed while the operation of each carbonization-to-oil device continues. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is an explanatory diagram showing the overall configuration of a carbonization-to-oil apparatus according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view showing a main part of the carbonization-oil production apparatus. [Figure 3] FIG. 4 is an explanatory diagram showing another embodiment of the carbonization-to-oil apparatus according to the present invention. [Figure 4] FIG. 10 is an explanatory diagram showing yet another embodiment of the carbonization-to-oil apparatus according to the present invention. [Figure 5] FIG. 10 is a plan view showing yet another embodiment of the carbonization-to-oil apparatus according to the present invention. [Figure 6] FIG. 10 is a plan view showing yet another embodiment of the carbonization-to-oil apparatus according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] As shown in Figures 1 and 2, the carbonization-to-oil apparatus according to an embodiment of the present invention includes a heating furnace 1 that generates vaporized gas (distillation gas) G1 by heating waste plastic, a catalyst tank 2 that promotes the decomposition of the vaporized gas G1 discharged from the heating furnace 1, a condenser 3 that cools and liquefies the decomposed gas G2 supplied from the catalyst tank 2, an oil recovery section 4 that recovers oil from the liquefied components liquefied in the condenser 3, and a supply pipe 5 that supplies the decomposed gas G2 discharged from the catalyst tank 2 to the installation section of the condenser 3.

[0026] The heating furnace 1 has a heating furnace body 11 made of a heat-resistant material, an outlet pipe 12 that leads the vaporized gas G1 generated in the heating furnace body 11 to the catalyst tank 2, a heating element 13 disposed within the heating furnace body 11, a superheated steam supply means 14 that supplies superheated steam S2 to the heating element 13, a heating burner 15 that discharges combustion gas N into the heating furnace body 11, and a residue storage section 16 that stores the dissolved residue of the workpiece H and is provided below the heating furnace body 11. The superheated steam supply means 14 is composed of a boiler 17 that boils water, and a superheated steam generator 18 that heats the steam S1 supplied from the boiler 17 to about 600°C to generate high-temperature, oxygen-free superheated steam S2.

[0027] Then, the material to be treated H containing waste plastics and the like is fed into the heating furnace body 11 from an inlet (not shown), and superheated steam S2 is sprayed from the superheated steam supply means 14 toward the heating element 13, while combustion gas N is supplied from the heating burner 15 into the heating furnace body 11. As a result, the inside of the heating furnace body 11 is heated to a high temperature (for example, 400°C or higher, preferably about 600°C) at which various types of waste plastics can be thermally decomposed, and various organic substances in the material to be treated H are thermally decomposed, and vaporized gas G1 containing hydrocarbon components is supplied into the catalyst tank 2 through the outlet pipe 12.

[0028] Volatile waste materials such as copper wire, iron scraps, and metal building materials mixed in the material to be treated H are appropriately collected in the residue storage section 16. Furthermore, carbonaceous components that remain as solids among the organic matter contained in the material to be treated H are collected in a reduced volume in the residue storage section 16 and utilized as fuel, etc.

[0029] The catalyst tank 2 contains at least one of a contact catalyst made of a zeolite catalyst (not shown) or the like that decomposes high molecular weight components in the vaporized gas G1 discharged from the heating furnace 1 into lower molecular weight components, and a solid acid catalyst made of an iron oxide catalyst (not shown) that separates and removes chlorine components in the vaporized gas G1, or other catalysts. The high molecular weight hydrocarbons in the vaporized gas G1 supplied from the heating furnace 1 to the catalyst tank 2 are decomposed by the zeolite catalyst or the like, and converted into low molecular weight hydrocarbons that become light oil components that can be effectively used as fuel, etc. The chlorine components in the vaporized gas G1 are adsorbed by the iron oxide catalyst or the like and removed, and recovered as hydrochloric acid, etc.

[0030] As shown in Fig. 2, an inclined wall 21 is provided at the bottom of the catalyst tank 2 to guide a jelly-like material Z (described later) toward the center. Also, below the catalyst tank 2, a reheating unit 22 is provided, which is composed of a ceramic heater, a high-frequency coil, an electric heating wire, or the like, and reheats the jelly-like material Z that has been guided along the inclined wall 21 to the center of the bottom of the catalyst tank 2. The jelly-like material Z, which has been reheated by the reheating unit 22 and has increased fluidity, is configured to be discharged downward via a discharge pipe 23 connected to the center of the bottom of the catalyst tank 2. Then, by opening an on-off valve 24 provided at the top of the discharge pipe 23, the jelly-like material Z in the catalyst tank 2 is discharged through the discharge pipe 23 into a storage tank 25.

[0031] The supply pipe 5 has an inclined portion 51 that is inclined so that the downstream side is positioned higher than the upstream side, and a hanging portion 52 that hangs down from the downstream end of the inclined portion 51. The supply pipe 5 is also provided with a detection means 53 that detects that the jelly-like material Z has accumulated in the inclined portion 51, and a heating portion 54 that heats the jelly-like material Z that has accumulated in the inclined portion 51 to increase its fluidity and thereby cause it to flow back into the catalyst tank 2.

[0032] The detection means 53 is composed of a temperature sensor or the like that detects a decrease in temperature that occurs when the jelly-like material Z accumulates in the inclined portion 51 of the supply pipe 5 from the catalyst tank 2. For example, when the cracked gas G2 discharged from the catalyst tank 2 passes through the inclined portion 51 of the supply pipe 5, if the temperature of the cracked gas G2 drops below the sublimation temperature of terephthalic acid (approximately 300°C), the terephthalic acid in the cracked gas G2 condenses and mixes with the liquid oil, producing the jelly-like material Z. If the jelly-like material Z accumulates in the inclined portion 51, the flow of the cracked gas G2 downstream is hindered, causing a decrease in the temperature downstream of the inclined portion 51. By detecting this state with a temperature sensor, it is possible to detect that the jelly-like material Z has accumulated in the inclined portion 51. Note that instead of the temperature sensor, a pressure sensor that detects the pressure inside the supply pipe 5 or a flow rate sensor that detects the amount of fluid flowing through the supply pipe 5 per unit time may be used to detect that the jelly-like material Z has accumulated in the inclined portion 51.

[0033] The heating section 54 is composed of a ceramic heater, a high-frequency coil, an electric heating wire, or the like that heats the jelly-like material Z retained in the inclined section 51. When the inside of the inclined section 51 is heated by the heating section 54 to a temperature equal to or higher than the sublimation point of terephthalic acid, for example, to about 350°C, the fluidity of the jelly-like material Z retained in the inclined section 51 is increased, and as a result, the jelly-like material Z flows down along the inclined section 51 and is refluxed into the catalyst tank 2.

[0034] A hanging portion 52 located downstream of the supply pipe 5 is piped so as to pass through an installation portion of the condenser 3 and reach the oil recovery portion 4. The cracked gas G2 flowing down through the hanging portion 52 is cooled by cooling water W (see FIG. 2 ) that is supplied to the condenser 3 from a cooling water supply pipe (not shown) and circulates therein, and at least a portion of the cracked gas G2 is liquefied and converted into an oil-water component Y.

[0035] 1, the oil recovery section 4 includes a drain pot 41 that separates the exhaust gas G3 contained in the oil-water component Y liquefied by the condenser 3, an oil-water separation tank 42 that separates the oil-water component Y that has passed through the drain pot 41 into oil and water, a filtration tank 43 that filters the oil discharged from the oil-water separation tank 42, and a storage tank 44 that stores the recycled oil from which impurities have been removed in the filtration tank 43. The exhaust gas G3 separated by the oil-water separation tank 42 is returned to the heating furnace 1 as necessary.

[0036] As described above, the present invention comprises a heating furnace 1 that generates vaporized gas G1 by heating waste plastics, a catalyst tank 2 that promotes the decomposition of the vaporized gas G1 discharged from the heating furnace 1, a condenser 3 that cools and liquefies the decomposition gas G2 supplied from the catalyst tank 2, and an oil recovery section 4 that recovers the oil of the oil-water component Y liquefied by the condenser 3. The supply pipe 5 that supplies the decomposition gas G2 discharged from the catalyst tank 2 to the condenser 3 is provided with an inclined section 51 that is inclined so that the downstream side is positioned higher than the upstream side, and a heating section 54 that heats the jelly-like material Z that has accumulated in the inclined section 51 to increase its fluidity and return it to the catalyst tank 2. This has the advantages of eliminating the need for the complicated task of previously separating the material H to be treated that is fed into the heating furnace 1 into polyethylene terephthalate and other materials, and of being able to efficiently carbonize waste plastics into oil with a simple configuration without the inconvenience of the pipes becoming clogged.

[0037] Specifically, when waste plastics containing a mixture of polyethylene terephthalate and other materials are simultaneously carbonized, sublimable substances such as terephthalic acid produced by the decomposition of polyethylene terephthalate tend to coagulate and clog the pipeline. In the present invention, a supply pipe 5, which supplies decomposition gas G2 derived from a catalyst tank 2 to a condenser 3, is provided with an inclined section 51, with the downstream side positioned higher than the upstream side, so that a jelly-like substance Z containing the sublimable substance tends to remain in the inclined section 51. This prevents the jelly-like substance Z from flowing downstream of the inclined section 51, effectively preventing blockage of the pipeline in the hanging section 52, etc., and also heats the jelly-like substance remaining in the inclined section 51 of the supply pipe 5 with a heating section 54 to increase its fluidity and allow it to return to the catalyst tank 2. Therefore, waste plastics can be efficiently carbonized into oil without the need for the cumbersome task of separating the waste plastic-containing material H into polyethylene terephthalate and other materials or for a complex structure to enable switching between the supply paths for both. Furthermore, when a certain amount of jelly-like material Z accumulates in the inclined portion 51 of the supply pipe 5, it is heated in the heating section 54 and returned to the catalyst tank 2, thereby reliably preventing the inclined portion 51, etc. from becoming blocked by the jelly-like material Z.

[0038] In place of the above-described embodiment that includes a detection means 53 for detecting that the jelly-like material Z has accumulated in the inclined portion 51 of the supply pipe 5, for example, when the operation of the carbonization-to-oil apparatus has continued for a certain period of time or more, the jelly-like material Z accumulated in the inclined portion 51 may be heated by a heating unit 54 to increase its fluidity and cause it to be returned to the catalyst tank 2. However, according to the configuration that includes a detection means 53 for detecting that the jelly-like material Z has accumulated in the inclined portion 51 of the supply pipe 5 as described above, the operation of heating the jelly-like material Z to cause it to be returned to the catalyst tank 2 and removed can be performed at an appropriate timing while the operation of the carbonization treatment tank is stopped. This has the advantage that the inconvenience of the supply pipe 5 becoming clogged can be reliably prevented without frequently stopping the carbonization treatment apparatus.

[0039] Furthermore, in the above-described embodiment, the discharge pipe 23 for discharging the jelly-like material Z returned from the inclined portion 51 to the catalyst tank 2 is provided at the bottom of the catalyst tank 2. Therefore, by appropriately guiding and storing the jelly-like material Z in the catalyst tank 2 in the storage tank 25, it is possible to prevent a large amount of jelly-like material Z from remaining in the catalyst tank 2 and impairing the catalyst tank 2's ability to promote the decomposition of the vaporized gas G1. Moreover, the jelly-like material Z stored in the storage tank 25 can be reused as fuel, etc.

[0040] Furthermore, as shown in the above-described embodiment, in a configuration including a reheating section 22 that heats the jelly-like material Z returned to the catalyst tank 2 to increase its fluidity and cause it to flow down into the discharge pipe 23, and an on-off valve 24 that opens and closes the discharge pipe 23, when a certain amount of the jelly-like material Z has accumulated in the catalyst tank 2, the jelly-like material Z can be reheated by the reheating section 22 and the on-off valve 24 can be opened to discharge and store the jelly-like material Z in the storage tank 25. Therefore, by opening the on-off valve 24 at the appropriate timing, it is possible to prevent a large amount of jelly-like material Z from accumulating in the catalyst tank 2, and by closing the on-off valve 24 after discharging the jelly-like material Z, it is possible to prevent air from flowing back into the catalyst tank 2 via the discharge pipe 23.

[0041] 3 or 4, a U-shaped trap section 26 may be provided in the discharge pipe 23 to restrict air from flowing from the downstream side to the upstream side. With this configuration, the jelly-like material Z accumulated in the catalyst tank 2 is sequentially discharged through the discharge pipe 23, and the discharge is automatically stopped as the amount of jelly-like material Z remaining in the catalyst tank 2 decreases, eliminating the need to open and close the on-off valve 24 at appropriate times, as described above. Furthermore, there is an advantage that the jelly-like material Z remaining in the U-shaped trap section 26 can prevent air from flowing back into the catalyst tank 2.

[0042] In the above embodiment, an example has been described in which a single catalyst tank 2 and inclined portion 51 are provided for one heating furnace 1, but as shown in Fig. 5, a configuration may also be adopted in which a single heating furnace 1 is provided with multiple catalyst tanks 2, 2 and inclined portions 51, 51, and multiple treatment lines L1, L2 that supply the vaporized gas G1 discharged from the heating furnace 1 via the discharge pipe 12 to each catalyst tank 2, and a switching valve 19 that switches the supply direction of the vaporized gas G1 to each treatment line L1, L2. With this configuration, by operating the switching valve 19 at the appropriate time to switch the supply direction of the vaporized gas G1, the jelly-like material Z that has accumulated in the inclined portion 51 can be returned to the catalyst tank 2 and removed while the carbonization-to-oil apparatus continues to operate.

[0043] For example, when the control means 6 confirms that the carbonization-to-oil apparatus has been operating for a certain period of time and that a certain amount of waste plastic has been processed, the control means 6 operates the switching valve 19 to control switching the supply direction of the vaporized gas G. This makes it possible to prevent a certain amount or more of the jelly-like material Z from remaining in the inclined portion 51 provided in one of the treatment lines L1, and after switching the supply direction of the vaporized gas G from the treatment line L1 to the treatment line L2, the jelly-like material Z remaining in the inclined portion 51 of the treatment line L1 can be returned to the catalyst tank 2 and removed without stopping the operation of the carbonization-to-oil apparatus.

[0044] It is also possible to omit the control means 6 and have an operator determine the retention state of the jelly-like material Z in each inclined section 51 and perform the switching operation of the switching valve 19. Alternatively, a plurality of detection means 53, 53 for detecting retention of the jelly-like material Z in the inclined section 51 of each processing line L1, L2 may be provided, and when the control means 6 confirms that the jelly-like material Z has accumulated in each inclined section 51 in response to the detection signals of the detection means 53, 53, the control means 6 may output a switching command signal to the switching valve 19 to switch the supply direction of the vaporized gas G1.

[0045] In the above embodiment, as shown in Fig. 5, an example was described in which a single heating furnace 1 is provided with a single outlet pipe 12 and a pair of processing lines L1, L2, and a switching valve 19 consisting of a three-way valve is provided to switch the supply direction of the vaporized gas G1 discharged from the outlet pipe 12 from one side of the processing lines L1, L2 to the other side. However, this is not limited to this, and various modifications are possible. For example, as shown in Fig. 6, a pair of outlet pipes 12 and a pair of processing lines L1, L2 may be provided in a heating furnace 1, and the supply direction of the vaporized gas G1 may be switched from one side of the processing lines L1, L2 to the other side by opening and closing switching valves 19, 19 consisting of on-off valves provided in both outlet pipes 12, 12. It is also possible to provide three or more processing lines in a single heating furnace 1. In addition, a condenser 3 and an oil recovery section 4 may be provided downstream of each of multiple processing lines L1, L2 installed in one heating furnace 1, or each supply pipe 5 may be joined upstream or downstream of the condenser 3, and a single oil recovery section 4 may be provided at the lower end of the joining section. [Explanation of symbols]

[0046] 1 Carbonization and oilification equipment 2 Catalyst tank 3. Capacitors 4 Oil recovery section 5 Supply pipe 6. Control Measures 11 Heating furnace body 12 Outlet pipe 13 Heating element 14 Superheated steam supply means 15 Heating burner 16 Residue storage section 17. Boiler 18 Superheated steam generator 19 Switching valve 21 Slanted wall 22 Reheating section 23 Discharge pipe 24 On-off valve 25 Containment Tank 41 Drain Pod 42 Oil-water separation tank 43 Filtration tank 44 Containment Tank 51 Slope 52 Drooping part 53 Detection Methods 54 Heating section G1 Vaporized Gas G2 decomposition gas G3 exhaust gas H. Processing object L1 Processing Line L2 Processing Line N Combustion gas S1 Water vapor S2 Superheated steam W Cooling water Y Oil / water component Z jelly-like substance

Claims

1. A carbonization-to-oil device comprising: a heating furnace that generates vaporized gas by heating waste plastics; a catalyst tank that promotes decomposition of the vaporized gas discharged from the heating furnace; a condenser that cools and liquefies the decomposed gas supplied from the catalyst tank; and an oil recovery unit that recovers oil from the oil-water component liquefied by the condenser, The carbonization-to-oil apparatus has a supply pipe that supplies the decomposition gas to the condenser, and is provided with an inclined section that is inclined so that the downstream side is positioned higher than the upstream side, and a heating section that heats the jelly-like material that has accumulated in the inclined section due to condensation of sublimable substances in the decomposition gas, increases its fluidity, and refluxes it into the catalyst tank.

2. 2. The carbonization-to-oil apparatus according to claim 1, wherein a detection means is provided in the supply pipe for detecting whether the jelly-like material has accumulated in the inclined portion.

3. 3. The carbonization-to-oil apparatus according to claim 1, further comprising a discharge pipe provided at the bottom of the catalyst tank for discharging the jelly-like material returned from the inclined portion to the catalyst tank.

4. 4. The carbonization-to-oil apparatus according to claim 3, further comprising: a reheating section for reheating the jelly-like material returned to the catalyst tank to increase its fluidity, thereby causing it to flow down into the discharge pipe; and an on-off valve for opening and closing the discharge pipe.

5. 4. The carbonization-to-oil production apparatus according to claim 3, wherein the discharge pipe is provided with a U-shaped trap portion for restricting air from flowing from the downstream side to the upstream side of the discharge pipe.

6. a plurality of catalyst tanks and inclined portions, and a plurality of treatment lines for supplying the vaporized gas to each of the catalyst tanks, are provided for one heating furnace; 3. The carbonization-to-oil production apparatus according to claim 1, further comprising a switching valve for switching the supply direction of the vaporized gas through the processing line.

7. 7. The carbonization-to-oil apparatus according to claim 6, further comprising a control means for controlling the switching valve so as to switch the supply direction of the vaporized gas when the operating time of the carbonization-to-oil apparatus reaches a certain time.

8. The carbonization-to-oil apparatus described in claim 6 is equipped with a plurality of detection means for detecting that the jelly-like material has accumulated in each of the inclined sections, and a control means for controlling the switching valve to switch the supply direction of the vaporized gas from one side of the processing line to the other side when the detection signal from the detection means detects that the jelly-like material has accumulated in one side of the processing line.

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