Abolition of synthetic resin oilification unit

Abstract

Disclosed is an apparatus for converting waste synthetic resin into oil, comprising: a cracking furnace in which waste synthetic resin is stored and which generates oil vapor, which is heavy oil, by heating the waste synthetic resin and irradiating it with ultraviolet light at the same time; a heat exchanger provided in communication with the cracking furnace and which cools the oil vapor, which is heavy oil, flowing in from the cracking furnace and converts it into liquid heavy oil; and a storage tank provided in communication with the heat exchanger and which receives and stores the heavy oil converted by the heat exchanger.

Description

Technical Field

[0001] The present invention relates to a waste synthetic resin oil conversion device.

Background Art

[0002] Generally, waste plastics made from raw materials such as polyethylene, polypropylene, and polystyrene have a reduced recycling rate, so most of them are treated by incineration or landfilling.

[0003] Incineration and landfilling of waste plastics induce serious environmental pollution and require a lot of time until they are decomposed in the natural state. Therefore, the development of an environmentally friendly and economical waste plastic treatment technology has been demanded.

[0004] The raw materials of waste synthetic resins such as waste vinyl and waste plastics are crude oil, and gasoline, diesel oil, and liquefied gas are also distilled and extracted from crude oil. The raw materials of waste synthetic resins are hydrocarbon polymers with a large molecular weight, while gasoline and diesel oil produced by oil refining companies are hydrocarbon polymers with a relatively small molecular weight. Therefore, after liquefying waste synthetic resins, it is possible to crack them and convert them into oil.

[0005] As a cracking method, usually, a thermal decomposition oil conversion process of heating a polymer substance under oxygen-free conditions is partially used. However, this method generates pollutants and the produced oil contains wax, tar, coking, ash, aluminum powder, and heavy metals, etc., resulting in low quality. Therefore, its use is currently prohibited.

[0006] In the conventional high-temperature pyrolysis oilification process, finely crushed waste synthetic resin is supplied to a high-temperature melting furnace to be melted in a gel state. After that, the gel-like melt is heated in a pyrolysis reactor at a high temperature of 450 °C or higher to be separated into gas and liquid. Then, heavy oil of the wax component is separated from the gaseous gas having an oil component, and the gas from which the heavy oil has been separated is condensed again to obtain a mixed heavy oil having a high viscosity. The mixed heavy oil obtained here is the main product to be produced in the pyrolysis process, which is a thick dark brown mixed oil having a high viscosity and containing a large amount of various heavy oil components having low to high boiling points, as well as a large amount of heavy metals, harmful substances, etc.

[0007] For example, Patent Document 1 described later discloses a "direct heating type oilification apparatus for waste synthetic resin using waste oil".

[0008] The direct heating type oilification apparatus for waste synthetic resin using waste oil according to Patent Document 1 described later includes a reactor in which raw materials including waste synthetic resin and waste oil are supplied, and pyrolysis occurs under high temperature and high pressure to generate gas, and a first heating member including a first heating section that heats the raw materials discharged from the reactor and is connected to the reactor and the pipe so as to circulate the heated raw materials back to the reactor, and a cooling section that cools and condenses the gas generated from the reactor to extract recycled oil.

[0009] After pyrolysis occurs in the reactor under high temperature and high pressure, gas is generated while the pressure is reduced. In the first heating member, one end of the pipe penetrates the side of the reactor and is connected to the inside of the reactor, and the other end is connected to the first heating section. A discharge pipe that discharges the raw materials inside the reactor to the first heating section, and one end is connected to the first heating section, and the other end is connected to the inside of the reactor. A circulation pipe that circulates the raw materials heated in the first heating section back to the reactor.

[0010] At the other end of the circulation pipe, a first discharge port and a second discharge port are respectively formed so as to circulate the raw material to the reactor. The first discharge port is used when thermal decomposition of the raw material proceeds in the reactor. The second discharge port is used in the process of circulating and gasifying the raw material under reduced pressure after the thermal decomposition of the raw material proceeds in the reactor. The first discharge port is formed without its end being separated outward. The second discharge port has its end separated outward so that the circulated raw material hits the inner wall of the reactor while spreading laterally.

[0011] Patent Document 2 to be described later discloses a "waste synthetic resin gasification device".

[0012] The waste synthetic resin gasification device according to Patent Document 2 to be described later can be charged with waste synthetic resin, and includes a heating furnace capable of thermally decomposing the waste synthetic resin while stirring, and a heat exchanger connected to the heating furnace for cooling and liquefying the oil gas generated when the waste synthetic resin is thermally decomposed in the heating furnace to produce a mixed oil, and a separation unit configured to be connected to the heat exchanger for separating the mixed oil into light oil and heavy oil using the boiling point difference.

[0013] The separation unit includes an inclined flow path portion inclined upward as a set angle while being connected to the heat exchanger, an auxiliary heating portion provided on the start end side in front of the inclined flow path portion for heating the mixed oil, an auxiliary cooling portion provided behind the auxiliary heating portion in the inclined flow path portion for cooling the mixed oil gas vaporized by the auxiliary heating portion, a first branch flow path connected to the inclined flow path portion behind the auxiliary cooling portion for separating the heavy oil liquefied by the auxiliary cooling portion, and a second branch flow path connected to the end of the inclined flow path portion for separating the light oil liquefied by the auxiliary cooling portion.

[0014] However, in the conventional thermal decomposition gasification process described above, since the waste synthetic resin supplied to the reactor should be heated to 450 °C or higher using indirect heating for each process, the heating time becomes relatively long, and there is a problem that a large amount of waste synthetic resin cannot be processed quickly.

Prior Art Documents

Patent Documents

[0015]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0016] Therefore, the technical problem to be solved by the present invention is that the present invention provides a waste synthetic resin oilification apparatus that rapidly produces mixed heavy oil (C 24 ~C 60 ) by cracking and decomposing waste synthetic resin at a relatively low temperature.

Means for Solving the Problems

[0017] One aspect of the present invention provides a waste synthetic resin oilification apparatus including a cracking furnace that houses waste synthetic resin and generates oil vapor, which is heavy oil, by heating the waste synthetic resin and irradiating it with ultraviolet rays at the same time; a heat exchanger that is provided to communicate with the cracking furnace and cools the oil vapor, which is heavy oil, flowing in from the cracking furnace to convert it into liquid heavy oil; and a storage tank that is provided to communicate with the heat exchanger and stores the heavy oil switched in the heat exchanger.

[0018] The cracking furnace may include a main body that houses waste synthetic resin; a heating unit provided inside the main body to heat the waste synthetic resin; an ultraviolet ray generating unit provided inside the main body to emit ultraviolet rays that are irradiated onto the waste synthetic resin by being heated by the heating unit; and an oil vapor discharge port provided at the upper part of the main body to discharge the generated oil vapor, which is heavy oil, to the heat exchanger.

[0019] The heating unit heats the interior of the main body to a temperature of 180 to 270°C, and the ultraviolet ray generation unit may be one that is heated by the heating unit and emits ultraviolet rays with a wavelength of 120 to 250 nm that decompose hydrocarbon chains contained in waste synthetic resin.

[0020] The ultraviolet ray generation unit includes any one or more ceramic composite accommodating parts in which a plurality of ceramic composites are accommodated. The ceramic composite is formed by mixing any one or two or more ceramic powders selected from Al2O3, ZrO2, and MgO, a fluoride powder which is any one or two or more mixtures selected from LiF, MgF2, and CaF2, and a thermoluminescent rare earth-based phosphor material which is any one or two or more mixtures selected from Terbium (Tb), cerium (Ce), europium (Eu), and dysprosium (Dy), followed by molding and sintering. The ceramic composite may be one that emits ultraviolet rays with a wavelength of 120 to 250 nm at a temperature of 180 to 270°C.

[0021] The waste synthetic resin oilification device may further include a temperature sensor connected to the decomposition furnace for measuring the temperature inside the decomposition furnace, a pressure sensor connected to the decomposition furnace for measuring the air pressure inside the decomposition furnace, and a control unit that receives the supply of the temperature value and air pressure value measured by the temperature sensor and the pressure sensor and adjusts the temperature of the heating unit.

[0022] The waste synthetic resin oilification device may further include a flow meter connected to the heat exchanger for measuring the flow rate of heavy oil supplied from the heat exchanger to the storage tank and supplying the measured flow rate value to the control unit. The control unit may be able to interrupt the operation of the heating unit when the flow rate value is less than the set value.

Effects of the Invention

[0023] According to the present invention, through a direct cracking decomposition reaction that simultaneously uses the light wave energy and thermal energy released by heating a ceramic composite having thermoluminescence characteristics, after vaporizing into oil mist, which is heavy oil, and then condensing it, a mixed heavy oil (C 24 ~C 60 ) can be obtained. Since the thermal energy and the light wave energy are used simultaneously, high-quality heavy oil can be obtained quickly under relatively low-temperature conditions, with less energy consumption, being economical, and having the effect of being able to produce high-quality heavy oil by an environmentally friendly method that does not generate pollutants (such as dioxins) by a low-temperature process.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0025] Hereinafter, the present invention will be described in more detail with reference to the drawings and embodiments. The terms and explanations described below are merely examples for clearly explaining the present invention, and the scope of rights of the present invention is not limited thereto.

[0026] In the description of the present invention, terms such as first, second, etc. are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of rights of the present invention, the first component can be called the second component, and similarly, the second component can also be called the first component. The term "and / or" includes a combination of a plurality of related described items or any one of a plurality of related described items.

[0027] The terms used in this application are merely used for explaining a specific embodiment and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "including" or "having" are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and do not preclude in advance the presence or addition possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0028] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted as an ideal or overly formal meaning unless clearly defined in this application.

[0029] FIG. 1 is a diagram schematically showing a waste synthetic resin oilification apparatus according to an embodiment of the present invention.

[0030] Referring to FIG. 1, a waste synthetic resin oil conversion apparatus according to an embodiment of the present invention includes a cracking furnace 10 that houses waste synthetic resin and generates vapor of heavy oil by heating the waste synthetic resin and irradiating ultraviolet rays at the same time; a heat exchanger 20 that is provided to communicate with the cracking furnace 10 and cools the vapor of heavy oil flowing in from the cracking furnace 10 to switch it to liquid heavy oil; and a storage tank 40 that is provided to communicate with the heat exchanger 20 and stores the heavy oil received from the heat exchanger 20 after the switch.

[0031] The waste synthetic resin oil conversion apparatus according to an embodiment of the present invention is for extracting heavy oil from waste synthetic resin by generating vapor of heavy oil by decomposing the waste synthetic resin and then liquefying the generated vapor of heavy oil to obtain heavy oil.

[0032] Different from the conventional thermal decomposition oil conversion process that requires a high-temperature process of 450°C or higher, the waste synthetic resin oil conversion apparatus of the present invention can rapidly decompose waste synthetic resin at a relatively low temperature through the wave energy of the irradiated ultraviolet rays while using thermal energy, so that a large amount of heavy oil can be produced in a short time.

[0033] Here, the waste synthetic resin can include waste plastics such as waste plastic and waste vinyl, and means a thermoplastic resin that can be cracked into low-molecular substances by heat.

[0034] Examples of thermoplastic resins can include polyethylene, polypropylene, polystyrene, ABS resin, acrylonitrile styrene, polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyphenylene oxide, polyacetal, polycarbonate, acrylic resin, nylon, polyamide, Teflon (registered trademark), synthetic rubber, polyvinyl chloride, and the like.

[0035] Here, the heavy oil can be defined as oils containing wax components, and bunker C oil can be taken as an example.

[0036] The waste synthetic resin oilification device according to an embodiment of the present invention includes a cracking furnace 10 and a heat exchanger 20. Describing them separately, it is as follows.

[0037] The cracking furnace 10 according to an embodiment of the present invention is for receiving the supply of waste synthetic resin, heating it, and generating oil vapor which is heavy oil.

[0038] The cracking furnace 10 may include a main body 11 in which waste synthetic resin is accommodated, a heating unit 13 provided inside the main body 11 for heating the waste synthetic resin, an ultraviolet ray generating unit 14 provided inside the main body 11 for emitting ultraviolet rays that are heated by the heating unit 13 and irradiated on the waste synthetic resin, and an oil vapor discharge port 16 provided at the upper part of the main body 11 for discharging the generated oil vapor which is heavy oil to the heat exchanger 20.

[0039] The main body 11 has a structure in which waste synthetic resin can be put inside, and can be configured in a cylindrical shape or a rectangular parallelepiped shape.

[0040] The waste synthetic resin is loaded on a trolley 17 and can be moved into the main body 11 through an inlet 12 provided on one side of the cracking furnace 10. Rails 18 for the movement of the trolley 17 loaded with waste synthetic resin can be provided on the bottom surface inside the main body 11.

[0041] The heating unit 13 heats so that the temperature inside the main body 11 becomes 180 to 270 °C. The ultraviolet ray generating unit 14 may emit ultraviolet rays with a wavelength of 120 to 250 nm that are heated by the heating unit 13 and decompose the hydrocarbon chains contained in the waste synthetic resin.

[0042] A heating unit 13 capable of raising the internal temperature of the main body 11 to 180 to 270 °C is provided inside the main body 11, and the heating unit 13 may be in a plate shape or a cylinder shape.

[0043] For example, the heating unit 13 can be plate-shaped and provided at a certain interval on both inner walls and the bottom surface of the main body 11. The heating unit 13 can be cylinder-shaped and provided one or a number of them at a certain interval vertically or horizontally adjacent to the inner wall of the main body 11 and perpendicular to the lower surface. The form of the heating unit 13 is not limited to these, and can be appropriately designed and changed in consideration of the form, dosage, target temperature, etc. of the cracking furnace 10.

[0044] The ultraviolet ray generating unit 14 includes at least one ceramic composite accommodating part 15a in which a plurality of ceramic composites 15b are accommodated.

[0045] The ceramic composite 15b is manufactured by mixing and molding any one or two or more ceramic powders selected from Al2O3, ZrO2, and MgO, a fluoride powder which is any one or two or more mixtures selected from LiF, MgF2, and CaF2, and a phosphor substance of a thermoluminescent rare earth system which is any one or two or more mixtures selected from terbium (Tb), cerium (Ce), europium (Eu), and dysprosium (Dy), and then sintering. The ceramic composite 15b can emit ultraviolet rays with a wavelength of 120 to 250 nm at a temperature of 180 to 270°C.

[0046] More specifically, inside the cracking furnace 10, an ultraviolet ray generating unit 14 is provided which emits ultraviolet rays to decompose the hydrocarbon chains contained in the waste synthetic resin. The ultraviolet ray generating unit 14 can be provided in a tile or block shape on the inner wall surface of the main body 11.

[0047] The ultraviolet ray generating unit 14 includes at least one or more ceramic composite accommodating parts 15a in which a plurality of ceramic composites 15b are accommodated. The ceramic composite accommodating part 15a is made of a material that does not block the ultraviolet rays emitted from the accommodated ceramic composite 15b and can withstand the heat applied by the heating unit 13. For example, a metal mesh can be used.

[0048] The ceramic composite 15b emits ultraviolet light with a wavelength of 120 to 250 nm corresponding to UV-C at a temperature of 180 to 270°C due to the characteristics of thermo-fluorescence. The wavelength of the emitted UV-C discontinuously exists within the range of 120 to 250 nm and corresponds to a pulse wave having strong wave energy. When the wave energy of the emitted ultraviolet light (pulse wave) is converted by wavelength, it corresponds to 989 to 480 kJ / mol.

[0049] Since the energy of the single bond (C-C) between carbons contained in polymers such as polyethylene, polypropylene, and polystyrene generally contained in the waste synthetic resin is 347 kJ / mol, the ultraviolet light emitted from the ceramic composite 15b has sufficient energy to cause direct cracking of the single bond between carbons.

[0050] Therefore, different from the conventional pyrolysis oilification process that required a high-temperature process of 450°C or higher, the waste synthetic resin oilification device of the present invention can decompose the waste synthetic resin even at a relatively low temperature of 180 to 270°C with wave energy emitted from the ceramic composite 15b and heat energy added, so the heating time can be shortened, and an effect of reducing the energy required to maintain a high temperature of 450°C or higher can be obtained. Furthermore, different from the case of decomposing the waste synthetic resin using only heat energy, since wave energy by ultraviolet irradiation is used simultaneously, the decomposition of the waste synthetic resin is caused more quickly, and there is an advantage that a large amount of heavy oil can be produced rapidly.

[0051] In the existing high-temperature pyrolysis process, coke, tar, and ash are generated and deposited on the inner wall of the pyrolysis reactor. In order to perform the next operation, the residue on the inner wall of the reactor should be removed every time, which causes a problem that the reactor cannot be continuously operated. However, since the waste synthetic resin oilification device of the present invention proceeds the process at a relatively low temperature, coke, tar, ash, etc. are not generated, so such a problem can be solved.

[0052] Furthermore, in the high-temperature pyrolysis process, the problem of releasing harmful substances such as dioxin and dust is inevitably involved. In the present invention, since harmful substances are not released by the low-temperature process, it is environmentally friendly and can save the cost for preventing and recovering the discharge of harmful substances, so it is economical.

[0053] Due to the thermal energy supplied from the heating unit 13 and the wave energy of ultraviolet rays emitted by the ceramic composite 15b, the hydrocarbon chains contained in the waste synthetic resin are decomposed, and most of the hydrocarbon chains with reduced molecular weight are vaporized into oil vapor, which is heavy oil with 24 to 60 carbon atoms.

[0054] More specifically, regarding the manufacturing method of the ceramic composite 15b, the ceramic composite 15b can be manufactured by mixing and molding the ceramic powder, the fluoride powder, and a thermoluminescent rare earth-based phosphor substance to produce a molded body, and sintering the molded body at a temperature of 1300 to 1450 °C.

[0055] The ceramic composite 15b can have a plate shape or a spherical shape with a diameter of 8 to 15 mm, but is not limited thereto. For the convenience of installation, the form of the ceramic composite 15b can be appropriately selected.

[0056] The oil vapor outlet 16 discharges the oil vapor, which is heavy oil vaporized by thermal energy and wave energy. Considering that the oil vapor, which is vaporized heavy oil, rises, it may be desirable to provide the oil vapor outlet 16 at the upper part of the main body 11, but it is not limited thereto.

[0057] For internal sealing, the decomposition furnace 10 can include a hydraulic cylinder. Since the decomposition furnace 10 sealed by the hydraulic cylinder has no air flowing in from the outside and forms an oxygen-free atmosphere, no additional reaction occurs other than the cracking reaction of the bonds between the waste synthetic resin carbons by the ultraviolet rays emitted from the ceramic composite 15b. Therefore, the pretreatment process for the waste synthetic resin is unnecessary, no pollutants are generated, and the residue of the decomposition is converted into a solid mass of carbon in the shape of charcoal. Impurities such as inorganic substances or metals that are not decomposed by the ceramic composite 15b can be separated from the residue of the decomposition and removed separately, and the residue of the decomposition can also be reused as a high-calorie solid fuel with a high carbon content.

[0058] A foreign matter discharge port for discharging foreign matters or moisture contained in the waste synthetic resin may be formed at the lower part of the main body 11.

[0059] Further, the waste synthetic resin oilification device may further include a temperature sensor 51 connected to the decomposition furnace 10 for measuring the internal temperature of the decomposition furnace 10, a pressure sensor 52 connected to the decomposition furnace 10 for measuring the internal pressure of the decomposition furnace 10, and a control unit 50 that receives the supply of the temperature value and the pressure value measured by the temperature sensor 51 and the pressure sensor 52 and adjusts the temperature of the heating unit 13.

[0060] The temperature sensor 51 and the pressure sensor 52 are provided to be connected to the inside of the decomposition furnace 10 so that the internal temperature and pressure of the decomposition furnace 10 can be easily measured.

[0061] The control unit 50 can recognize the temperature and pressure values measured by the temperature sensor 51 and the pressure sensor 52, and when the temperature and pressure are excessively high, increase the temperature of the heating unit 13, and when the measured temperature and pressure are excessively low, decrease the temperature of the heating unit 13 for control.

[0062] The heat exchanger 20 according to an embodiment of the present invention communicates with the cracking furnace 10 and is for generating heavy oil by cooling and liquefying the oil vapor which is the heavy oil flowing in from the cracking furnace 10.

[0063] The heat exchanger 20 can be connected to the oil vapor discharge port 16 of the cracking furnace 10. The heat exchanger 20 can include a cooling water tank storing cooling water. The oil vapor which is the heavy oil flowing into the heat exchanger 20 can have its heat taken away by the cooling water tank, be cooled and liquefied, and be switched to heavy oil.

[0064] Such a heat exchanger 20 is composed of a heat exchanger 20 which is a well-known technology widely known in the industry, so a more detailed description regarding the configuration of the heat exchanger 20 itself is omitted.

[0065] The waste synthetic resin oilification device is connected to the heat exchanger 20 and further includes a flow meter 53 which measures the flow rate of the heavy oil supplied to the storage tank 40 by the heat exchanger 20 and supplies the measured flow rate value to the control unit 50. When the flow rate value is less than the set value, the control unit 50 can interrupt the operation of the heating unit 13.

[0066] When the flow rate of the heavy oil measured by the flow meter 53 is less than a certain value, it means that the oil vapor which is the heavy oil extractable from the waste synthetic resin has been exhausted. At this time, the control unit 50 can end the waste synthetic resin oilification process by interrupting the operation of the heating unit 13. The set value can be set to be different according to the amount of waste synthetic resin input into the cracking furnace 10. For example, when 6000 kg of waste synthetic resin is input, the set value can be set to 100 l / hr.

[0067] The control unit 50 is preferably the same as the control unit 50 which receives the supply of temperature and pressure values from the temperature sensor 51 and the pressure sensor 52 described above, and can operate automatically or passively.

[0068] The waste synthetic resin oil conversion device can further include an oil-water separator 30 that is provided to communicate with the heat exchanger 20, removes moisture contained in the heavy oil supplied from the heat exchanger 20, and supplies the heavy oil with the moisture removed to the storage tank 40.

[0069] The oil-water separator 30 separates the moisture contained in the heavy oil liquefied by the heat exchanger 20 using a gravity method using a density difference or centrifugal separation.

[0070] Since such an oil-water separator 30 is composed of a publicly known oil-water separator 30 widely known in the industry, a more detailed description regarding the configuration of the heat exchanger 20 itself is omitted.

[0071] The generated heavy oil can be transferred and stored in a storage tank 40 connected to the heat exchanger or the oil-water separator 30.

[0072] With the above-described configuration, the waste synthetic resin oil conversion device of the present invention can decompose the carbon-carbon bonds contained in the waste plastic by utilizing the wave energy of ultraviolet rays emitted from the ceramic composite 15b even at a low temperature of 180 to 270 °C, and the hydrocarbons with a reduced number of carbon atoms can be smoothly vaporized into oil. The generated oil vapor passes through the cooling and liquefaction processes to obtain high-quality heavy oil having C 24 ~C 60 carbon atoms.

[0073] Hereinafter, the operation and preferred embodiments of the waste synthetic resin oil conversion device of the present invention configured as described above will be described in detail.

[0074] The waste synthetic resin is loaded onto a carriage 17 that is automatically transferred and is put into the inside of the decomposition furnace 10. The waste synthetic resin is put into six vinyl packs, three in each of the two carriages 17, and is put into the inside of the decomposition furnace 10. After loading, the inlet 12 is sealed using a hydraulic cylinder, and when the flow rate of the cooling water of the heat exchanger 20 reaches a constant state, the operation of the heating unit 13 is started.

[0075] The heating unit 13 has a cylindrical shape, and twelve (12) are provided on each of the two side portions inside the main body 11 in the direction perpendicular to the lower surface, six (6) on each side, and twenty-four (24) are provided on the lower surface inside the main body 11 in the horizontal direction with respect to the lower surface.

[0076] The internal temperature of the main body 11 is set to an initial 60°C. After the waste synthetic resin is introduced, the heating unit 13 operates to raise the temperature inside the main body 11 to 270°C.

[0077] The ultraviolet ray generation unit 14 arranged adjacent to the heating unit 13 provided on the upper surface and both side surfaces inside the main body 11 absorbs thermal energy, and the ceramic composite 15b accommodated in the ceramic composite accommodation part 15a included in the ultraviolet ray generation unit 14 emits ultraviolet rays having a wavelength of 120 to 250 nm. Due to the wave energy of the emitted ultraviolet rays, the bonds between carbons contained in the waste synthetic resin are decomposed, evaporated as oil vapor, which is heavy oil having 24 to 60 carbon atoms, and discharged to the oil vapor discharge port 16 provided on one side of the upper part of the cracking furnace 10.

[0078] The oil vapor, which is the discharged heavy oil, is cooled and condensed via the heat exchanger 20 and switched to liquid heavy oil. Thereafter, the heavy oil is supplied to the oil-water separator 30, and a small amount of moisture contained in the heavy oil is separated and removed by the oil-water separator 30. The heavy oil passing through the oil-water separator 30 is supplied to and stored in a storage tank.

[0079] The flow meter 53 connected to the heat exchanger 20 measures the flow rate of the generated heavy oil and supplies it to the control unit 50. When the flow rate decreases below a certain value, the control unit 50 interrupts the operation of the heating unit 13 and ends the process.

[0080] Experimental Example 1. Experiment on Measuring Ultraviolet Ray Emission of Ceramic Composite

[0081] To analyze the ultraviolet ray emission characteristics of the ceramic composite, the wavelength and intensity of the light emitted at a temperature of 180 to 270°C of the ceramic composite were measured.

[0082] The ceramic composite was manufactured in the following manner. Based on 100 parts by weight of ceramic powder obtained by pulverizing alumina (Al2O3), zirconia (ZrO2), and magnesia (MgO) with a purity of 99.99% or more to mesh #2400 or finer, 7 parts by weight of fluoride powder obtained by mixing LiF, MgF2, and CaF2, and 3 parts by weight of a thermoluminescent rare earth-based substance obtained by mixing terbium oxide (Tb3O) powder, dysprosium oxide (Dy2O3) powder, and cerium oxide (CeO2) powder were mixed. After molding the mixture into spheres with a diameter of 10 mm, it was sintered at 1400 °C to produce the ceramic composite.

[0083] Figure 3 is a graph showing the results of measuring the wavelength and intensity of the light emitted when the ceramic composite is heated at a temperature of 180 to 270 °C. As shown in Figure 3 above, it was confirmed that ultraviolet light having a wavelength in the range of 120 to 250 nm is emitted, and a discontinuous wavelength distribution (121, 124, 130, 220, 225, 249 nm) is shown in the said wavelength range.

[0084] On the other hand, in Table 1 below, the bond energies corresponding to the types of chemical bonds present in mixed plastics such as polyethylene, polypropylene, and polystyrene contained in general waste synthetic resins are shown, and Table 2 below shows the wave energy conversion values according to the wavelength of the light emitted from the ceramic composite. The conversion was carried out through Equation (1) described later.

[0085]

Equation

[0086] Here, E is energy, h is Planck's constant (6.626×10 -34 J / s), c is the speed of light (3×10 8 m / s), and λ is the wavelength.

[0087]

Table 1

[0088]

Table 2

[0089] As shown in Table 1 and Table 2 above, the wave energy of light having a wavelength of 120 to 250 nm is larger than the bond energy (347 kJ / mol) of the single carbon-carbon bond that most exists in the waste synthetic resin. Therefore, it was confirmed that the light emitted from the ceramic composite has sufficient energy to decompose the single carbon-carbon bond of the waste synthetic resin.

[0090] Experimental Example 2. Thermogravimetric analysis

[0091] To confirm the decomposition performance of the waste synthetic resin of the ceramic composite, thermogravimetric analysis (TGA) was carried out.

[0092] After putting a high-density polyethylene (HDPE) sample alone into a thermogravimetric analyzer, the temperature was raised at a heating rate of 2 °C / min to measure the weight. Also, the weight was measured under the same conditions except that the high-density polyethylene sample was put into the thermogravimetric analyzer together with the ceramic composite. The analysis results are shown in FIG. 4. FIG. 4a is the thermogravimetric analysis result of the high-density polyethylene sample alone, and FIG. 4b is the thermogravimetric analysis result of the high-density polyethylene sample and the ceramic composite.

[0093] As shown in FIGS. 4a and 4b above, when the high-density polyethylene sample was put in alone, a decrease in mass was observed from a temperature of 220 °C, whereas when the ceramic composite was put in together, it was confirmed that the decrease in mass started from a temperature of 110 °C.

[0094] Also, under the condition of maintaining a constant temperature of 250 °C for 300 minutes, thermogravimetric analysis was carried out on the high-density polyethylene sample alone, and the same analysis was carried out on the high-density polyethylene sample and the ceramic composite together for comparison. The above analysis results are shown in FIG. 5.

[0095] As shown in FIG. 5 above, when the high-density polyethylene sample was introduced alone, the mass began to decrease after 85 minutes, and after the analysis was completed, it was confirmed that a 12% weight loss occurred compared to the initial sample input weight.

[0096] On the other hand, when the ceramic composite was introduced together, decomposition began after only 7 minutes, and after the analysis was completed, it was confirmed that a 68% weight loss occurred compared to the initial input sample weight.

[0097] Therefore, from the above thermogravimetric analysis results, it was confirmed that the ceramic composite can decompose a large amount of synthetic resin at a lower temperature, at a faster rate.

[0098] Experimental Example 3. Analysis of Physical Properties and Components of the Product

[0099] According to the preferred embodiment of the waste synthetic resin oilification apparatus described above, heavy oil was produced from waste synthetic resin, and the physical properties and components of the produced heavy oil and residues were analyzed. In Table 3 below, the results of analyzing the physical properties of the produced heavy oil are shown, and FIG. 6 shows the GC-MS (gas chromatograph-mass spectrometer) analysis spectrum of the produced heavy oil. Also, the results of analyzing the physical properties and components of the residues are shown in Table 4 below.

[0100]

Table 3

[0101]

Table 4

[0102] As shown in Table 3 above, heavy oil in a liquid state with high viscosity at normal temperature was produced, and it was confirmed that no problems were found in the spontaneous ignition test, water reactivity test, and oxidation test of the produced heavy oil, and safe production was possible. Also, as shown in the GC-MS measurement results in FIG. 6, the produced heavy oil shows a carbon number distribution of C 23 ~C 54 and shows a carbon number distribution of C34 ~C 44 It was confirmed that it contained the most paraffin-based wax components.

[0103] On the other hand, as shown in Table 4 above, the residue remaining after the production of heavy oil was a black solid similar to charcoal, and it was confirmed that it contained a small amount of moisture, ash, chlorine, yellow matter, and metal components such as mercury, cadmium, lead, and arsenic. In particular, it was confirmed that it had a lower calorific value of 5000 kcal / kg or more and could itself be used as a solid fuel.

[0104] Therefore, from the above results, it was confirmed that high-quality heavy oil could be produced from the waste synthetic resin oilification apparatus according to the desirable embodiment of the present invention, and the residue could be used as a solid fuel.

[0105] The above-described embodiments are examples for explaining the present invention, and the present invention is not limited thereto. Those with ordinary knowledge in the technical field to which the present invention pertains should be able to implement the present invention in various modifications therefrom, so the technical protection scope of the present invention should be determined by the appended claims.

Industrial Applicability

[0106] The present invention can rapidly produce mixed heavy oil (C 24 ~C 60 ) by a method of cracking and decomposing waste synthetic resin at a relatively low temperature.

Claims

1. A cracking furnace that contains waste synthetic resin and generates oil vapor, which is heavy oil, by heating the waste synthetic resin and simultaneously irradiating it with ultraviolet light; A heat exchanger provided so as to communicate with the cracking furnace, which cools the oil vapor, which is heavy oil, flowing in from the cracking furnace and switches it to liquid heavy oil; A storage tank provided so as to communicate with the heat exchanger, which receives and stores the heavy oil switched in the heat exchanger; comprising; The cracking furnace is a main body that contains waste synthetic resin; a heating unit provided inside the main body that heats the waste synthetic resin; an ultraviolet ray generation unit provided inside the main body that emits ultraviolet rays that are heated by the heating unit and irradiated onto the waste synthetic resin; The ultraviolet ray generation unit emits ultraviolet rays with a wavelength of 120 to 250 nm that are heated by the heating unit and decompose the hydrocarbon chains contained in the waste synthetic resin; The ultraviolet ray generation unit includes at least one or more ceramic composite accommodating portions in which a plurality of ceramic composites are accommodated; The ceramic composite is manufactured by mixing and molding any one or two or more ceramic powders selected from among Al₂O₃, ZrO₂, and MgO, any one or two or more fluoride powders that are mixtures selected from among LiF, MgF₂, and CaF₂, and any one or two or more mixtures that are thermoluminescent rare earth-based phosphor substances selected from among terbium (Tb), cerium (Ce), europium (Eu), and dysprosium (Dy), and then sintering. The ceramic composite emits ultraviolet rays with a wavelength of 120 to 250 nm at a temperature of 180 to 270°C. A waste synthetic resin oil conversion device characterized by the above.

2. The cracking furnace is provided at the upper part of the main body and includes an oil vapor discharge port that discharges the generated oil vapor, which is heavy oil, to the heat exchanger. The waste synthetic resin oil conversion device according to Claim 1.

3. The heating unit heats the inside of the main body to a temperature of 180 to 270°C. The waste synthetic resin oil conversion device according to Claim 2.

4. The waste synthetic resin oil conversion device is connected to the cracking furnace and includes a temperature sensor that measures the temperature inside the cracking furnace; connected to the cracking furnace and includes a pressure sensor that measures the pressure inside the cracking furnace; A control unit that receives the supply of the temperature value and the atmospheric pressure value measured by the temperature sensor and the pressure sensor and adjusts the temperature of the heating unit; further comprising The waste synthetic resin oilification apparatus according to claim 2.

5. The waste synthetic resin oilification apparatus is further comprising a flow meter that is connected to the heat exchanger, measures the flow rate of the heavy oil supplied from the heat exchanger to the storage tank, and supplies the measured flow rate value to the control unit; when the flow rate value is less than a set value, the control unit interrupts the operation of the heating unit The waste synthetic resin oilification apparatus according to claim 4.

Images