Waste synthetic resin emulsification device

Abstract

Disclosed is a waste synthetic resin emulsification apparatus. The waste synthetic resin emulsification apparatus according to an embodiment of the present invention includes a decomposition furnace accommodating waste synthetic resin, irradiating the waste synthetic resin with ultraviolet rays while heating the waste synthetic resin to generate oil vapor as heavy oil; a heat exchanger disposed in communication with the decomposition furnace, for cooling the oil vapor as heavy oil flowing in from the decomposition furnace and converting it into heavy oil in a liquid phase; and a storage tank disposed in communication with the heat exchanger, for receiving and storing the heavy oil converted in the heat exchanger.

Description

Technical Field

[0001] This invention relates to a waste synthetic resin emulsification device. Background Technology

[0002] Generally speaking, waste plastics made from materials such as polyethylene, polypropylene, and polystyrene have a low recycling rate and are mostly disposed of through incineration or landfill.

[0003] Because the incineration or landfilling of waste plastics causes serious environmental pollution and takes a long time to decompose to a natural state, there is a need to develop environmentally friendly and economical waste plastic treatment technologies.

[0004] Waste synthetic resins, such as waste ethylene or waste plastics, are derived from crude oil. Gasoline, diesel, and liquefied petroleum gas are also extracted from crude oil through distillation. The raw materials for waste synthetic resins are hydrocarbon polymers with relatively large molecular weights, while gasoline and diesel produced by oil refineries are hydrocarbon polymers with relatively small molecular weights. Therefore, waste synthetic resins can be liquefied and then cracked to convert them into petroleum.

[0005] As a pyrolysis method, thermal decomposition emulsification of polymer materials under anaerobic conditions is usually partially employed. However, this not only produces pollutants, but the resulting oil also contains wax, tar, coke, ash, aluminum foil, and heavy metals. Due to its low quality, it is currently prohibited from use.

[0006] In existing high-temperature pyrolysis emulsification processes, finely crushed waste synthetic resin is fed into a high-temperature melting furnace to melt into a gel-like state. The gel-like molten liquid is then heated to over 450°C in a pyrolysis reactor, separating it into gas and liquid components. This mixture is then formulated to separate heavy oil containing wax components from the oily gaseous state. The separated heavy oil gas is then condensed again to obtain a high-viscosity mixed heavy oil. This mixed heavy oil, intended as the main byproduct of the pyrolysis process, contains a mixture of various heavy oil components with low to high boiling points. This high-viscosity, dark brown mixed oil contains significant amounts of heavy metals and harmful substances.

[0007] For example, Patent Document 1 below discloses a "Direct Heating Waste Synthetic Resin Emulsification Device Utilizing Waste Oil".

[0008] According to Patent Document 1 below, a direct-heating waste synthetic resin emulsification apparatus utilizing waste oil is supplied with raw materials comprising waste synthetic resin and waste oil. The apparatus includes: a reactor that undergoes thermal decomposition at high temperature and high pressure to generate gas; a first heating component comprising a first heating unit connected to the reactor via a pipe, thereby heating the raw material discharged from the reactor and recycling the heated raw material back to the reactor; and a cooling unit that cools and condenses the gas generated from the reactor to extract regenerated oil.

[0009] After thermal decomposition under high temperature and high pressure, the reactor generates gas as the pressure is reduced. In the first heating component, one end of the exhaust pipe passes through the side of the reactor and connects to the interior of the reactor, while the other end is connected to the first heating unit. The reactor includes an exhaust pipe that discharges the raw material inside the reactor to the first heating unit; and a circulation pipe that connects one end to the first heating unit and the other end to the interior of the reactor, allowing the raw material heated in the first heating unit to circulate back to the reactor.

[0010] The other end of the circulation pipe is respectively formed with a first outlet and a second outlet for circulating the raw material to the reactor. The first outlet is used when the raw material is thermally decomposed in the reactor, and the second outlet is used during the process of circulating and gasifying the raw material under reduced pressure after thermal decomposition in the reactor. The first outlet is formed so that its end does not extend outward, and the end of the second outlet extends outward, so that the circulating raw material diffuses laterally and impacts the inner wall of the reactor.

[0011] Patent document 2 below discloses a "waste synthetic resin emulsification device".

[0012] According to Patent Document 2 below, a waste synthetic resin emulsification device can be used to feed waste synthetic resin, which includes: a heating furnace for stirring the waste synthetic resin and thermally decomposing it; a heat exchanger connected to the heating furnace for cooling and liquefying the oily gas generated during the thermal decomposition of the waste synthetic resin in the heating furnace to generate a mixed oil; and a separation unit connected to the heat exchanger for separating the mixed oil into light oil and heavy oil by utilizing the boiling point difference.

[0013] The separation unit includes: an inclined flow path unit connected to the heat exchanger and inclined upward at a set angle; an auxiliary heating unit installed at the front starting end of the inclined flow path unit for heating the mixed oil; an auxiliary cooling unit installed behind the auxiliary heating unit from the inclined flow path unit for cooling the mixed oil vapor vapor vaporized by the auxiliary heating unit; a first branch flow path connected to the inclined flow path unit behind the auxiliary cooling unit for separating the heavy oil liquefied by the auxiliary cooling unit; and a second branch flow path connected to the end of the inclined flow path unit for separating the light oil liquefied by the auxiliary cooling unit.

[0014] However, in the existing thermal decomposition emulsification process, the waste synthetic resin supplied to the reactor must be heated to above 450°C in each step by indirect heating. Therefore, the heating time is relatively long, and there is a problem that large amounts of waste synthetic resin cannot be processed quickly.

[0015] Existing technical documents

[0016] Patent documents

[0017] Patent Document 1: Korean Patent No. 10-2012-0019346

[0018] Patent Document 2: Korean Utility Model Patent No. 20-2012-0007128 Summary of the Invention

[0019] Technical issues

[0020] Therefore, the technical problem to be solved by the present invention is to provide a waste synthetic resin emulsification device, which rapidly produces mixed heavy oil (C) by cracking and decomposing waste synthetic resin at a lower temperature. 24 ~C 60 ).

[0021] Technical solution

[0022] One aspect of the present invention provides a waste synthetic resin emulsification apparatus, comprising: a decomposition furnace for containing waste synthetic resin, wherein the waste synthetic resin is heated and irradiated with ultraviolet light to generate oil vapor as heavy oil; a heat exchanger disposed in communication with the decomposition furnace for cooling the oil vapor as heavy oil flowing in from the decomposition furnace and converting it into liquid heavy oil; and a storage tank disposed in communication with the heat exchanger for receiving and storing the heavy oil converted in the heat exchanger.

[0023] The decomposition furnace may include: a main body for containing waste synthetic resin; a heating unit disposed inside the main body for heating the waste synthetic resin; an ultraviolet emitting unit disposed inside the main body and heated by the heating unit to emit ultraviolet light to irradiate the waste synthetic resin; and an oil vapor outlet disposed at the upper part of the main body for discharging the generated oil vapor, which is a heavy oil, into the heat exchanger.

[0024] The heating unit can heat the internal temperature of the main body to 180 to 270°C. The ultraviolet emitting unit is heated by the heating unit and emits ultraviolet light with a wavelength of 120 nm to 250 nm to decompose the hydrocarbon chains contained in the waste synthetic resin.

[0025] The ultraviolet emitting unit may include one or more ceramic composite housings that contain multiple ceramic composites. The ceramic composites may be manufactured by mixing and molding a mixture of one or more ceramic powders selected from Al2O3, ZrO2 and MgO, a fluoride powder selected from one or more mixtures selected from LiF, MgF2 and CaF2, and a thermoluminescent rare earth phosphor material selected from one or more mixtures selected from terbium (Tb), cerium (Ce), europium (Eu) and dysprosium (Dy), and then sintering the mixture. The ceramic composites may emit ultraviolet light with a wavelength of 120 to 250 nm at a temperature of 180 to 270°C.

[0026] The waste synthetic resin emulsification device may further include: a temperature sensor connected to the decomposition furnace and measuring the temperature inside the decomposition furnace; a pressure sensor connected to the decomposition furnace and measuring the air pressure inside the decomposition furnace; and a control unit that receives the temperature and air pressure values ​​measured by the temperature sensor and the pressure sensor and adjusts the temperature of the heating unit.

[0027] The waste synthetic resin emulsification 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, wherein the control unit may interrupt the operation of the heating unit when the flow rate value is less than a set value.

[0028] Invention Effects

[0029] According to the present invention, by simultaneously utilizing the light and heat energy released from heating a ceramic composite with thermoluminescent properties, waste synthetic resin is vaporized into fine oil mist particles of heavy oil through a direct pyrolysis and decomposition reaction. These particles can then be condensed to obtain mixed heavy oil (C). 24 ~C 60Because it utilizes both thermal and light energy, high-quality heavy oil can be obtained rapidly at lower temperatures, resulting in low energy consumption and economy. Furthermore, since the low-temperature process does not produce pollutants (such as dioxins), it has the effect of producing high-quality heavy oil in an environmentally friendly manner. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of an emulsification apparatus for waste synthetic resin according to an embodiment of the present invention.

[0031] Figure 2 A diagram of a decomposition furnace according to an embodiment of the present invention is shown.

[0032] Figure 3 It is a graph showing the measurement results of the wavelength and intensity of light emitted by the ceramic composite according to an embodiment of the present invention.

[0033] Figure 4 It is a graph showing the thermogravimetric analysis results used to confirm the decomposition performance of waste synthetic resin in ceramic composites according to an embodiment of the present invention.

[0034] Figure 5 It is a graph showing the thermogravimetric analysis results used to confirm the decomposition performance of waste synthetic resin in ceramic composites according to an embodiment of the present invention.

[0035] Figure 6 It is a graph showing the GC-MS (gas chromatograph-mass spectrometer) analysis spectrum of heavy oil produced according to an embodiment of the present invention. Detailed Implementation

[0036] The invention will now be described in more detail with reference to the accompanying drawings and embodiments. The terminology and descriptions described below are merely exemplary to clearly illustrate the invention and should not be construed as limiting the scope of the invention.

[0037] Terms such as "first" and "second" used in the description of this invention are for the purpose of distinguishing one constituent element from another. For example, without departing from the scope of the invention, a first constituent element may be named a second constituent element, and similarly, a second constituent element may be named a first constituent element. The term "and / or" includes any combination of one or more of the plurality of related statements.

[0038] The terminology used in this invention is for describing specific embodiments only and is not intended to limit the invention. Unless the context clearly indicates otherwise, plural expressions are included. Terms such as "comprising" or "having" are intended to indicate the presence of features, numbers, steps, operations, constituent elements, components, or combinations thereof recorded in the specification, and should be understood as not precluding the possibility of the presence or addition of one or more other features, numbers, steps, operations, constituent elements, components, or combinations thereof.

[0039] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms as defined in common dictionaries should be interpreted as having the same meaning as they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0040] Figure 1 This is a schematic diagram of an emulsification apparatus for waste synthetic resin according to an embodiment of the present invention.

[0041] refer to Figure 1 According to an embodiment of the present invention, a waste synthetic resin emulsification apparatus includes: a decomposition furnace 10 for containing waste synthetic resin, wherein the waste synthetic resin is heated and irradiated with ultraviolet light to generate oil vapor as heavy oil; a heat exchanger 20 disposed in communication with the decomposition furnace 10 for cooling the oil vapor as heavy oil flowing in from the decomposition furnace 10 and converting it into liquid heavy oil; and a storage tank 40 disposed in communication with the heat exchanger 20 for receiving and storing the heavy oil converted in the heat exchanger 20.

[0042] According to an embodiment of the present invention, a waste synthetic resin emulsification device decomposes waste synthetic resin to generate oil vapor as heavy oil, and then liquefies the generated oil vapor as heavy oil to obtain heavy oil, thereby extracting heavy oil from waste synthetic resin.

[0043] Unlike existing thermal decomposition emulsification processes that require high temperatures above 450°C, the waste synthetic resin emulsification device of this invention utilizes heat energy while simultaneously irradiating ultraviolet light energy to rapidly decompose waste synthetic resin at lower temperatures, thereby producing a large quantity of heavy oil in a short time.

[0044] Here, waste synthetic resin can include waste plastics, waste ethylene, etc., which refers to thermoplastic resins that are decomposed into low molecular weight materials by heating.

[0045] Thermoplastic resins can be, for example, polyethylene, polypropylene, polystyrene, ABS resin, acrylonitrile styrene, polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfite, polyphenylene ether, polyacetal, polycarbonate, acrylic resin, nylon, polyamide, polytetrafluoroethylene, synthetic rubber, polyvinyl chloride, etc.

[0046] Heavy oil here can be defined as oil containing wax components, such as marine grade C oil.

[0047] The waste synthetic resin emulsification apparatus according to an embodiment of the present invention comprises a decomposition furnace 10 and a heat exchanger 20, the configurations of which are described below.

[0048] According to an embodiment of the present invention, the decomposition furnace 10 receives a supply of waste synthetic resin and heats it to generate oil vapor as heavy oil.

[0049] The decomposition furnace 10 may include: a main body 11 containing waste synthetic resin; a heating unit 13 disposed inside the main body 11 for heating the waste synthetic resin; an ultraviolet emitting unit 14 disposed inside the main body 11 and heated by the heating unit 13 to emit ultraviolet light to irradiate the waste synthetic resin; and an oil vapor outlet 16 disposed at the upper part of the main body 11 to discharge the generated heavy oil as steam into the heat exchanger 20.

[0050] The main body 11 has a structure that allows waste synthetic resin to be injected into its interior, and can be constructed in a cylindrical or cuboid shape.

[0051] Waste synthetic resin can be loaded onto a trolley 17 and moved to the main body 11 through an inlet 12 installed on one side of the decomposition furnace 10. The inner bottom of the main body 11 can be provided with a track 18 for moving the trolley 17 loaded with waste synthetic resin.

[0052] The heating unit 13 heats the internal temperature of the main body 11 to 180°C to 270°C. The ultraviolet emitting unit 14 is heated by the heating unit 13 and can emit ultraviolet light with a wavelength of 120nm to 250nm to decompose the hydrocarbon chains contained in the waste synthetic resin.

[0053] The main body 11 is provided with a heating unit 13 that can heat the internal temperature of the main body 11 to 180°C to 270°C. The heating unit 13 can be plate-shaped or cylindrical.

[0054] For example, the heating unit 13 can be plate-shaped and spaced apart on the inner walls and bottom surface of the main body 11. The heating unit 13 can also be cylindrical and adjacent to the inner wall of the main body 11, vertically or horizontally arranged, or multiple units can be arranged at certain intervals. The shape of the heating unit 13 is not limited to these, and can be appropriately designed and modified considering the shape, capacity, target temperature, etc. of the decomposition furnace 10.

[0055] The ultraviolet emitting unit 14 includes one or more ceramic composite housing units 15a that house multiple ceramic composites 15b.

[0056] The ceramic composite 15b is manufactured by mixing and molding a mixture of one or more ceramic powders selected from Al2O3, ZrO2 and MgO, a fluoride powder selected from one or more mixtures selected from LiF, MgF2 and CaF2, and a thermoluminescent rare earth phosphor material selected from one or more mixtures selected from terbium (Tb), cerium (Ce), europium (Eu) and dysprosium (Dy), and then sintering the mixture. The ceramic composite 15b can emit ultraviolet light with a wavelength of 120nm to 250nm at a temperature of 180°C to 270°C.

[0057] More specifically, the decomposition furnace 10 is equipped with an ultraviolet emitting unit 14 that emits ultraviolet light to decompose hydrocarbon chains contained in waste synthetic resin. The ultraviolet emitting unit 14 may be disposed in sheet or block form on the inner wall of the main body 11.

[0058] The ultraviolet emitting unit 14 includes one or more ceramic composite housing units 15a that house multiple ceramic composites 15b. The ceramic composite housing unit 15a is made of a material capable of withstanding heat applied from the heating unit 13 without blocking ultraviolet light emitted from the housed ceramic composites 15b, for example, a metal mesh can be used.

[0059] The ceramic composite 15b emits ultraviolet light with wavelengths of 120 to 250 nm, corresponding to UV-C, at temperatures ranging from 180 to 270°C, based on its thermofluorescence properties. The emitted UV-C wavelengths are discontinuous within this 120 to 250 nm range and correspond to pulsed waves with high energy. The wave energy of the emitted ultraviolet light (pulse wave), when converted to wavelength, is equivalent to 989 to 480 kJ / mol.

[0060] Since the carbon-carbon single bond (CC) energy contained in polymers such as polyethylene, polypropylene, and polystyrene typically found 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 bonds between carbon elements.

[0061] Therefore, unlike existing thermal decomposition emulsification processes that require temperatures above 450°C, the waste synthetic resin emulsification apparatus of this invention adds thermal energy to the wave energy emitted from the ceramic composite 15b, enabling the decomposition of waste synthetic resin even at lower temperatures of 180 to 270°C. This shortens the heating time and reduces the energy required to maintain temperatures above 450°C. Furthermore, unlike the use of only thermal energy to decompose waste synthetic resin, the simultaneous use of wave energy from ultraviolet radiation results in faster decomposition and the ability to rapidly generate large quantities of heavy oil.

[0062] Furthermore, existing high-temperature pyrolysis processes generate coke, tar, and ash, which deposit on the inner wall of the pyrolysis reactor. To proceed with the next step, these residues must be removed from the reactor wall each time, leading to the inability to operate the reactor continuously. However, the waste synthetic resin emulsification device of this invention solves this problem because the process is carried out at a relatively low temperature and does not produce coke, tar, or ash.

[0063] In addition, high-temperature pyrolysis processes inevitably release harmful substances such as dioxins and dust, while the present invention uses a low-temperature process that does not release any harmful substances, making it environmentally friendly and saving the costs of preventing the emission and recycling of harmful substances, thus having economic benefits.

[0064] The hydrocarbon chains contained in the waste synthetic resin are decomposed by the heat energy supplied by the heating unit 13 and the ultraviolet wave energy emitted by the ceramic composite 15b, and most of the hydrocarbon chains with reduced molecular weight are vaporized into oil vapors of heavy oil with 24 to 60 carbon atoms.

[0065] The method for manufacturing the ceramic composite 15b is described in more detail. Manufacturing the ceramic composite 15b may include the steps of mixing and molding the ceramic powder, the fluoride powder and the thermoluminescent rare earth phosphor material to produce a molded body; and the step of sintering the molded body at a temperature of 1300 to 1450°C.

[0066] The ceramic composite 15b may be plate-shaped or spherical with a diameter of 8 to 15 mm, but is not limited thereto, and the shape of the ceramic composite 15b may be appropriately selected for ease of installation.

[0067] The oil vapor outlet 16 discharges oil vapor, which is heavy oil, vaporized by thermal energy and wave energy. Considering that the vaporized oil vapor, which is heavy oil, rises, the oil vapor outlet 16 can preferably be installed on the upper part of the main body 11, but is not limited thereto.

[0068] The decomposition furnace 10 may include a hydraulic cylinder to seal the interior. Since outside air is not introduced into the decomposition furnace 10 sealed by the hydraulic cylinder, creating an oxygen-free atmosphere, no additional reactions occur except for the cracking reaction of the carbon-to-carbon bonds in the waste synthetic resin caused by the ultraviolet light emitted by the ceramic composite 15b. Therefore, the waste synthetic resin requires no pretreatment process, produces no pollutants, and the decomposition residue is transformed into carbon blocks such as charcoal. Inorganic substances or metals that are not decomposed by the ceramic composite 15b can be separated from the decomposition residue and collected separately, and the decomposition residue can also be reused as a high-carbon, high-calorific-value solid fuel.

[0069] The lower part of the main body 11 may be formed with a foreign matter discharge port for discharging foreign matter or moisture contained in waste synthetic resin.

[0070] In addition, the waste synthetic resin emulsification device may further include: a temperature sensor 51, connected to the decomposition furnace 10 and measuring the temperature inside the decomposition furnace 10; a pressure sensor 52, connected to the decomposition furnace 10 and measuring the air pressure inside the decomposition furnace 10; and a control unit 50, receiving the temperature and air pressure values ​​measured by the temperature sensor 51 and the pressure sensor 52 and adjusting the temperature of the heating unit 13.

[0071] The temperature sensor 51 and the pressure sensor 52 are configured to be connected to the interior of the decomposition furnace 10 in order to measure the temperature and pressure inside the decomposition furnace 10.

[0072] The control unit 50 identifies the temperature and pressure values ​​measured from the temperature sensor 51 and the pressure sensor 52, and can control the temperature of the heating unit 13 to be increased when the temperature and pressure are too high, and can control the temperature of the heating unit 13 to be decreased when the measured temperature and pressure are too low.

[0073] According to an embodiment of the present invention, the heat exchanger 20 is connected to the decomposition furnace 10, thereby cooling and liquefying the oil vapor flowing in from the decomposition furnace 10 as heavy oil to generate heavy oil.

[0074] The heat exchanger 20 can be connected to the oil vapor outlet 16 of the decomposition furnace 10. The heat exchanger 20 may include a cooling water tank storing cooling water. The oil vapor, which is heavy oil, flowing into the heat exchanger 20 has its heat removed by the cooling water tank, is cooled and liquefied, and can thus be converted into heavy oil.

[0075] Since such a heat exchanger 20 is constructed using heat exchanger 20 of well-known technology widely known in the art, a more detailed description of the construction of the heat exchanger 20 itself will be omitted.

[0076] The waste synthetic resin emulsification device further includes a flow meter 53, which is connected to the heat exchanger 20 and is used to measure the flow rate of heavy oil supplied from the heat exchanger 20 to the storage tank 40. The measured flow rate value is supplied to the control unit 50. When the flow rate value is less than a set value, the control unit 50 can interrupt the operation of the heating unit 13.

[0077] When the heavy oil flow rate measured by the flow meter 53 is less than a certain value, it means that the oil vapor that can be extracted from the waste synthetic resin as heavy oil has been exhausted. At this time, the control unit 50 can terminate the waste synthetic resin emulsification process by interrupting the operation of the heating unit 13. The set value can be set differently depending on the amount of waste synthetic resin fed into the decomposition furnace 10. For example, when 6000 kg of waste synthetic resin is fed, the set value can be set to 100 l / hr.

[0078] The control unit 50 is preferably the same as the aforementioned control unit 50 that receives temperature and pressure values ​​from the temperature sensor 51 and the pressure sensor 52, and can be operated automatically or manually.

[0079] The waste synthetic resin emulsification device may further include an oil-water separator 30, which is configured in communication with the heat exchanger 20 to remove water contained in the heavy oil supplied from the heat exchanger 20 and to supply the water-removed heavy oil to the storage tank 40.

[0080] The oil-water separator 30 separates the water contained in the heavy oil liquefied by the heat exchanger 20 by using gravity or centrifugal separation based on density difference.

[0081] Since such an oil-water separator 30 is constructed using oil-water separators of well-known technology widely known in the art, a more detailed description of the construction of the oil-water separator 30 itself will be omitted.

[0082] The heavy oil generated above can be transferred to a storage tank 40 connected to the heat exchanger or the oil-water separator 30 for storage.

[0083] Due to the above-described structure, the waste synthetic resin emulsification device of the present invention can decompose the carbon-carbon bonds contained in waste plastics even at low temperatures of 180 to 270°C using the ultraviolet light emitted from the ceramic composite 15b. Hydrocarbons with reduced carbon numbers can be readily vaporized. The generated vaporized oil is then cooled and liquefied to obtain C64 carbon-containing compounds. 24~C 60 High-quality heavy oil.

[0084] The operation and preferred embodiments of the waste synthetic resin emulsification device of the present invention, as described above, will now be described in detail.

[0085] Waste synthetic resin is loaded onto the automated transport trolley 17 and placed inside the decomposition furnace 10. The waste synthetic resin is then loaded into six plastic bags on two trolleys 17 (three bags each) and placed inside the decomposition furnace 10. After loading, the inlet 12 is sealed using a hydraulic cylinder. When the cooling water flow rate of the heat exchanger 20 reaches a certain level, the heating unit 13 is started.

[0086] The heating unit 13 is cylindrical, with 12 units (6 units each) installed on both sides of the body 11 in a direction perpendicular to the lower surface, and 24 units installed on the lower surface of the body 11 in a direction horizontal to the lower surface.

[0087] The internal temperature of the main body 11 is initially set to 60°C, and after the waste synthetic resin is added, the heating unit 13 is operated to raise the internal temperature of the main body 11 to 270°C.

[0088] An ultraviolet emitting unit 14, disposed adjacent to the heating unit 13 installed on the upper and side surfaces inside the main body 11, absorbs heat energy, and a ceramic composite 15b, housed in the ceramic composite housing unit 15a contained within the ultraviolet emitting unit 14, emits ultraviolet light with a wavelength of 120 to 250 nm. Due to the energy of the emitted ultraviolet light, the bonds between carbon atoms in the waste synthetic resin are broken down, evaporating into oil vapor, which is a heavy oil with a carbon number of 24 to 60, and is discharged through an oil vapor outlet 16 installed on one side of the upper part of the decomposition furnace 10.

[0089] The discharged oil vapor, which is heavy oil, is cooled and condensed in heat exchanger 20, and converted into liquid heavy oil. Then, the heavy oil is supplied to oil-water separator 30, where the small amount of water contained in the heavy oil is separated and removed. The heavy oil passing through oil-water separator 30 is then supplied and stored in a storage tank.

[0090] A 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 to end the process.

[0091] Example 1. Experiment measuring ultraviolet emission from a ceramic composite

[0092] To analyze the ultraviolet emission characteristics of the ceramic composite, the wavelength and intensity of light emitted from the ceramic composite at temperatures ranging from 180 to 270°C were measured.

[0093] The ceramic composite was prepared by the following method: Alumina (Al₂O₃), zirconium oxide (ZrO₂), and magnesium oxide (MgO) with a purity of 99.99% or higher were mixed with 7 parts by weight of fluoride powders of LiF, MgF₂, and CaF₂ (based on 100 parts by weight of ceramic powder pulverized to a mesh size of #2400 or higher), and 3 parts by weight of a thermoluminescent rare earth material composed of terbium oxide (Tb₃O₃), dysprosium oxide (Dy₂O₃), and cerium oxide (CeO₂) powders. The mixture was shaped into spheres with a diameter of 10 mm and then sintered at 1400 °C to produce the ceramic composite.

[0094] Figure 3 It is a graph showing the measurement results of the wavelength and intensity of the light emitted when the ceramic composite is heated to a temperature of 180 to 270°C. As described above. Figure 3 As shown, it emits ultraviolet light with wavelengths in the range of 120 to 250 nm, and it can be confirmed that discontinuous wavelength distributions (121, 124, 130, 220, 225, 249 nm) are observed in the wavelength range.

[0095] In addition, Table 1 below shows the bond energies based on the types of chemical bonds present in mixed plastics such as polyethylene, polypropylene, and polystyrene contained in general waste synthetic resins, and Table 2 below shows the wave energy conversion values ​​based on the wavelength of light emitted by the ceramic composite. The conversion is performed by the following mathematical formula 1.

[0096] Mathematical Formula 1

[0097]

[0098] Where E is energy and h is Planck's constant (6.626 × 10⁻⁶). -34 J / s), c is the speed of light (3×10⁻⁶ J / s), and c is the speed of light (3×10⁻⁶ J / s). 8 (m / s), where λ is the wavelength.

[0099] Table 1

[0100]

[0101]

[0102] Table 2

[0103] 121 ～989 124 ～965 130 ～920 220 ～704 225 ～532 249 ～480

[0104] As can be confirmed from Tables 1 and 2, the wavelength energy of light in the range of 120 to 250 nm is greater than the binding energy of the most abundant carbon-to-carbon single bonds in the waste synthetic resin (347 kJ / mol). Therefore, it can be confirmed that the light emitted by the ceramic composite has sufficient energy to decompose the carbon-to-carbon single bonds in the waste synthetic resin.

[0105] Example 2. Thermogravimetric Analysis

[0106] Thermogravimetric analysis (TGA) was performed to confirm the decomposition performance of the waste synthetic resin in the ceramic composite.

[0107] High-density polyethylene (HDPE) samples were placed individually in a thermogravimetric analyzer and heated at a rate of 2 °C / min, with weight measured. Additionally, the HDPE samples were also measured under the same conditions, except when placed together with the ceramic composite in the thermogravimetric analyzer. The analytical results are as follows: Figure 4 As shown. Figure 4 a represents the individual thermogravimetric analysis result of the high-density polyethylene sample. Figure 4 b shows the thermogravimetric analysis results of the high-density polyethylene sample and the ceramic composite.

[0108] As mentioned above Figure 4 As shown in 4a and 4b, when the high-density polyethylene sample was added alone, a decrease in mass was observed at a temperature of 220°C. Conversely, when the ceramic composite was added together, a decrease in mass was confirmed to begin at a temperature of 110°C.

[0109] In addition, individual thermogravimetric analyses were performed on the high-density polyethylene samples at a constant temperature of 250°C for 300 minutes, and the same analysis was also performed on the high-density polyethylene samples and the ceramic composite for comparison. The above analytical results are as follows: Figure 5 As shown.

[0110] like Figure 5 As shown, when a high-density polyethylene sample was added alone, mass reduction began after 85 minutes. After the analysis was completed, a 12% weight reduction was confirmed compared to the initial sample weight.

[0111] Conversely, when the ceramic composite was added together, decomposition began after 7 minutes, and after analysis, it was confirmed that the weight was reduced by 68% compared to the initial weight of the sample.

[0112] Therefore, the thermogravimetric analysis results confirm that the ceramic composite can rapidly decompose a large amount of synthetic resin at a relatively low temperature.

[0113] Example 3. Analysis of the physical properties and composition of the results

[0114] According to the preferred embodiment of the above-described waste synthetic resin emulsification device, heavy oil is produced from waste synthetic resin, and the physical properties and composition of the produced heavy oil and residue are analyzed. Table 3 below shows the results of the physical property analysis of the produced heavy oil. Figure 6 The GC-MS (gas chromatograph-mass spectrometer) analysis spectrum of the produced heavy oil is shown. Additionally, the physical properties and compositional analysis results of the residue are shown in Table 4 below.

[0115] Table 3

[0116]

[0117] Table 4

[0118]

[0119]

[0120] As shown in Table 3 above, high-viscosity liquid heavy oil was produced at room temperature. No problems were found in the auto-ignition test, water reactivity test, and oxidation test of the produced heavy oil, confirming that it is safe for production. Furthermore, as... Figure 6 The GC-MS results show that the generated heavy oil exhibits C 23 ~C 54 The carbon number distribution confirmed that it contains the most C. 34 ~C 44 Paraffin components.

[0121] Furthermore, as shown in Table 4 above, the residue remaining after heavy oil production is a black solid similar to charcoal. It has been confirmed that it contains moisture, ash, chlorine, sulfur, and small amounts of metals such as mercury, cadmium, lead, and arsenic. In particular, because it has a lower heating value of over 5000 kcal / kg, it can be confirmed that the residue itself can be used as a solid fuel.

[0122] Therefore, the above results confirm that the waste synthetic resin emulsification device according to the preferred embodiment of the present invention can produce high-quality heavy oil, and the residue can be used as solid fuel.

[0123] The above embodiments are examples for explaining the present invention, and the present invention is not limited thereto. Those skilled in the art will be able to implement the present invention with various modifications; therefore, the scope of protection of the present invention should be determined by the appended claims.

[0124] Industrial availability

[0125] This invention can rapidly produce mixed heavy oil (C60 ... 24 ~C60 )。

Claims

1. A waste synthetic resin pyrolysis device, comprising: A decomposition furnace is used to contain waste synthetic resin, and the waste synthetic resin is heated while being irradiated with ultraviolet light to generate oil vapor as heavy oil. A heat exchanger, connected in communication with the decomposition furnace, is used to cool the oil vapor, which is heavy oil, flowing in from the decomposition furnace and convert it into liquid heavy oil. as well as A storage tank, configured in communication with the heat exchanger, is used to receive and store the heavy oil converted in the heat exchanger. The decomposition furnace includes: The main body contains waste synthetic resin; A heating unit is disposed inside the main body to heat the waste synthetic resin; An ultraviolet emitting unit, disposed inside the main body and heated by the heating unit, emits ultraviolet light to decompose hydrocarbon chains contained in the waste synthetic resin; and An oil vapor outlet is located at the upper part of the main body, which discharges the generated oil vapor, which is heavy oil, into the heat exchanger. The ultraviolet emitting unit includes one or more ceramic composite housings that contain multiple ceramic composites, wherein the multiple ceramic composites are heated by the heating unit to emit ultraviolet light for decomposing hydrocarbon chains contained in the waste synthetic resin. The ceramic composite is manufactured by mixing and molding one or more ceramic powders selected from Al2O3, ZrO2, and MgO, one or more fluoride powders selected from LiF, MgF2, and CaF2, and one or more thermoluminescent rare earth phosphor materials selected from terbium, cerium, europium, and dysprosium, and then sintering them. The ceramic composite emits ultraviolet light with wavelengths of 120 nm to 250 nm at temperatures ranging from 180°C to 270°C.

2. The waste synthetic resin pyrolysis device according to claim 1, wherein, The heating unit heats the internal temperature of the main body to 180°C to 270°C. The ultraviolet emitting unit is heated by the heating unit and emits ultraviolet light with a wavelength of 120nm to 250nm to decompose the hydrocarbon chains contained in the waste synthetic resin.

3. The waste synthetic resin pyrolysis device according to claim 1, wherein the waste synthetic resin pyrolysis device further comprises: A temperature sensor is connected to the decomposition furnace and measures the temperature inside the decomposition furnace. A pressure sensor is connected to the decomposition furnace and measures the gas pressure inside the decomposition furnace; as well as The control unit receives the temperature and pressure values ​​measured by the temperature sensor and the pressure sensor and adjusts the temperature of the heating unit.

4. The waste synthetic resin pyrolysis device according to claim 3, The waste synthetic resin pyrolysis unit further includes 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. in, When the flow rate is less than the set value, the control unit stops operating the heating unit.

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