Waste pyrolysis system

Abstract

The present invention provides a waste pyrolysis system comprising: a waste supply device for heating and compressing waste and discharging same in a molten state; a waste pyrolysis device for receiving the molten waste from the waste supply device and pyrolyzing same; and an emulsification heat exchanger which cools condensable gas of combustible gas generated in the pyrolysis device, so as to generate pyrolysis oil, and which discharges non-condensable gas.

Description

Waste pyrolysis system

[0001] The present invention relates to a waste pyrolysis system that can continuously supply, heat and pressurize waste such as waste plastic to pyrolyze it or supply it to a demander.

[0002] Recent industrial development has led to a surge in the production of products made from plastics and other raw materials. This phenomenon has resulted in a significant increase in waste, including plastic waste, and various methods for efficiently disposing of this waste are being proposed.

[0003] The most widely used methods for handling this waste include minimizing its volume by landfilling, incinerating, or dumping it into the ocean. However, landfilling or dumping into the ocean presents numerous challenges, including secondary pollution from leachate, limited landfill sites, and prohibitions on marine pollution and ocean dumping.

[0004] Another proposed solution to avoid these problems is the thermal decomposition of waste. In this process, compressed waste plastic, such as waste plastic, is fed into a hopper at a recycling facility. The compressed waste plastic is then heated and compressed in a heating chamber, where it is thermally decomposed into molten waste plastic, which is then discharged to the next process for post-processing.

[0005] However, this method of pyrolysis of waste plastics poses limitations in processing large volumes due to the prolonged reaction time of compressed waste plastic during the pyrolysis process. Furthermore, the significant labor required for the input and output of waste plastic raises concerns. Furthermore, pyrolysis devices are limited in their ability to process large volumes of waste plastic, and the long processing time required to process the final residue reduces economic feasibility.

[0006] The present invention is intended to solve such problems, and more specifically, to provide a waste pyrolysis system capable of supplying waste such as waste plastic in a sufficiently molten state before being supplied to a pyrolysis device, reacting the molten waste continuously and in large quantities, thereby reducing the reaction time, and selectively discharging ash during this series of processes.

[0007] In order to achieve the above purpose, the present invention provides a waste pyrolysis system comprising: a waste supply device that heats and compresses waste and discharges it in a molten state; a waste pyrolysis device that receives the molten waste from the waste supply device and thermally decomposes it; and an emulsifying heat exchanger that cools condensable gas among combustible gases generated from the pyrolysis device to produce pyrolysis oil and discharges non-condensable gas.

[0008] The waste thermal decomposition device may include a body into which molten waste is introduced from one side; a double jacket arranged to surround an inner or outer surface of the body, which receives hot air supplied from the outside to indirectly heat the inside of the body and discharges it to the outside; and a hot air delivery unit connected to the double jacket to supply hot air and thermally decompose waste introduced into the body.

[0009] The body may include a first path for delivering hot air supplied from the outside to the double jacket, and a second path spaced apart from the first path for delivering hot air supplied from the outside to the hot air delivery unit.

[0010] The hot air delivery unit may include a first hot air delivery unit arranged inside the body so as to communicate with the second path, a second hot air delivery unit arranged vertically apart from the first hot air delivery unit, and a plurality of third hot air delivery units arranged so as to communicate the first hot air delivery unit and the second hot air delivery unit.

[0011] The above hot air delivery unit is formed so that the first hot air delivery unit and the first hot air delivery unit correspond to the cross-sectional shape of the body, and the first hot air delivery unit may include a first sub-delivery unit connecting the inside.

[0012] The above hot air delivery unit may be connected to the second hot air delivery unit and the double jacket.

[0013] The waste pyrolysis system may further include a lower hopper disposed below the first hot air delivery unit; a first scraper disposed on the lower hopper; and a second scraper disposed on the first hot air delivery unit.

[0014] The waste pyrolysis system may further include a hot air heater that provides hot air to the waste pyrolysis device through different paths; a pyrolysis oil storage tank that condenses combustible gas from the emulsification heat exchanger and stores the discharged pyrolysis oil; and a prevention facility that treats exhaust gas discharged from the waste pyrolysis device.

[0015] The above waste pyrolysis system may further include a wax removal device interposed between the waste pyrolysis device and the emulsification heat exchanger to remove coagulated polymer materials while cooling the combustible gas.

[0016] The above waste pyrolysis system may further include a residue removal device that discharges residue remaining after pyrolysis in the waste pyrolysis device, and continuously or intermittently discharges the residue during the process in which the waste pyrolysis device pyrolyzes molten waste.

[0017] The above waste supply device may include a hopper into which waste is introduced; a heating chamber in which waste introduced through the hopper is heated and compressed while moving along the length thereof inside; a first heater for heating waste received inside the heating chamber; a pressurizing means disposed on one side of the heating chamber for moving and pressurizing waste introduced from the hopper in the other direction; and a center rod disposed in the inner central region along the length thereof.

[0018] The center load may include a second heater that heats a central region of the waste.

[0019] One end of the center rod is formed to have a smaller cross-sectional area or diameter than the other end, and when the pressurizing means pressurizes waste, one end of the center rod can be inserted at least partially into the central area of ​​the pressurizing means.

[0020] The waste pyrolysis system may further include a first grate for passing molten waste from the other side of the heating chamber to divide it horizontally or vertically into a plurality of zones.

[0021] The first grate may include a first housing coupled along the other end edge of the heating chamber, a plurality of first frames arranged in a first direction inside the first housing, and at least one or a plurality of second frames arranged in a second direction different from the first direction inside the first housing.

[0022] The above first great may be arranged so that the other side of the center load is supported by the first frame or the second frame in the central region.

[0023] According to the waste pyrolysis system according to an embodiment of the present invention,

[0024] First, the waste to be supplied to the pyrolysis device can be heated and pressurized in a pre-molten state to continuously perform the waste treatment process.

[0025] Second, since the molten waste is sequentially introduced into the pyrolysis device and heated indirectly, it can process large amounts of waste.

[0026] Third, since the upper and lower parts are evenly heated through the hot air transmission part inside the body, heat can be evenly transmitted to the inside of the waste.

[0027] Fourth, the double jacket prevents the body heat from quickly spreading to the outside.

[0028] Fifth, by equipping a wax removal device and a residue removal device, it is possible to obtain higher quality gas while easily discharging residue without stopping the operation of the pyrolysis device.

[0029] Sixth, since the center load is placed along the central area inside the heating chamber, the overall thickness of the waste can be reduced by more than half, which allows for smooth heat transfer.

[0030] Seventh, by providing a second heater in the center load, heating is also performed in the central area of ​​the waste, so that heating can be performed uniformly over the entire area of ​​the waste.

[0031] Eighth, since the waste heated through the first heater is divided as it passes through the grate, there is an effect that can increase the thermal decomposition and stirring effect.

[0032] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0033] The above summary, as well as the detailed description of preferred embodiments of the present application described below, will be better understood when read in conjunction with the accompanying drawings. For the purpose of illustrating the present invention, preferred embodiments are depicted in the drawings. However, it should be understood that the present application is not limited to the precise arrangements and means illustrated.

[0034] Figure 1 is a reference diagram illustrating a waste thermal decomposition system according to an embodiment of the present invention.

[0035] Figure 2 is a block diagram schematically illustrating the waste pyrolysis system shown in Figure 1.

[0036] Figure 3 is a cross-sectional view showing a pyrolysis device of the waste pyrolysis system shown in Figure 1.

[0037] Figure 4 is a reference drawing schematically illustrating the hot air delivery unit of the pyrolysis device shown in Figure 3.

[0038] Figure 5 is a reference drawing schematically illustrating the wax removal device shown in Figure 2.

[0039] Figure 6 is a cross-sectional view illustrating the waste supply device shown in Figure 1.

[0040] Figure 7 is a reference drawing showing the grate of the waste supply device shown in Figure 6 according to an example.

[0041] Fig. 8 is a cross-sectional view showing the center load of the waste supply device shown in Fig. 6 in an enlarged form according to an embodiment.

[0042] The present invention can have various modifications and embodiments, and specific embodiments are illustrated and described in the drawings.

[0043] However, this is not intended to limit the present invention to a specific embodiment, but should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

[0044] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms.

[0045] The above terms are used solely to distinguish one component from another.

[0046] For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

[0047] The term and / or includes any combination of a plurality of related described items or any one of a plurality of related described items.

[0048] When it is said that a component is "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but there may also be other components in between.

[0049] On the other hand, when it is said that a component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0050] The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit the present invention.

[0051] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0052] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0053] Hereinafter, embodiments will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or corresponding components are given the same reference numbers, and redundant descriptions thereof will be omitted.

[0054] FIG. 1 is a reference diagram illustrating a waste pyrolysis system according to an embodiment of the present invention, and FIG. 2 is a block diagram briefly illustrating the waste pyrolysis system shown in FIG. 1.

[0055] Referring to FIGS. 1 and 2, the waste pyrolysis system (10) according to an embodiment of the present invention includes various devices.

[0056] FIG. 1 is an exemplary illustration of a waste pyrolysis system (10) according to an embodiment of the present invention, and new devices may be added or the illustrated devices may be omitted.

[0057] A waste pyrolysis system (10) according to an embodiment of the present invention may include a waste supply device (100), a waste pyrolysis device (200), an emulsification heat exchanger (300), a pyrolysis oil storage tank (400), a hot air heater (500), an exhaust gas heat exchanger (600), a prevention facility (700), a wax removal device (800), and a residue removal device (900).

[0058] First, the waste supply device (100) can process waste plastic, such as waste plastic, to be supplied to the pyrolysis device (200) into a molten state between a liquid and a solid (e.g., a gel state) by preprocessing the waste plastic. The waste plastic processed in the waste supply device (100) in this way can be supplied to the pyrolysis device (200) in a state where its density, temperature, movement speed, etc. can become relatively uniform from the central region to the outer region while being heated, compressed, moved, and divided, thereby facilitating pyrolysis. At this time, the waste supply device (100) can continuously supply waste. For example, the waste supply device (100) can continuously supply molten waste to the pyrolysis device (200).

[0059] Additionally, molten waste may be fed into a waste pyrolysis device (200, hereinafter referred to as a pyrolysis device), and the waste may be pyrolyzed at a high temperature to generate combustible gas. The pyrolysis device (200) may include devices for completely combusting the generated combustible gas or increasing the pyrolysis efficiency.

[0060] Additionally, combustible gas generated from a pyrolysis device (200) may be introduced into the emulsification heat exchanger (300). The emulsification heat exchanger (300) may include devices that generate pyrolysis oil from condensable gas among the introduced combustible gases.

[0061] Additionally, the pyrolysis oil storage tank (400) can store pyrolysis oil discharged by condensing combustible gas in the emulsification heat exchanger (300).

[0062] In addition, the hot air heater (500) can generate heated air by supplying fuel, and supply the heated air, i.e., hot air, to the pyrolysis device (200) by receiving waste heat contained in the non-condensable gas provided from the emulsification heat exchanger (300).

[0063] In addition, the exhaust gas heat exchanger (600) may include devices for recovering waste heat from the exhaust gas discharged from the pyrolysis device (200) and using it for various hot water or heating purposes. In addition, the exhaust gas heat exchanger (600) may include devices for protecting the prevention facility (700) located at the rear from high temperatures.

[0064] In addition, the prevention facility (700) can remove pollutants contained in the exhaust gas discharged from the exhaust gas heat exchanger (600) and then discharge the exhaust gas to the outside.

[0065] In addition, a wax removal device (800) is interposed between the thermal decomposition device (200) and the emulsification heat exchanger (300) to remove the coagulated polymer material while cooling the combustible gas.

[0066] In addition, the residue removal device (900) can discharge residue remaining after pyrolysis in the pyrolysis device (200).

[0067] Here, each major component is roughly distinguished and named for convenience of explanation and is merely exemplary. In addition, waste products pyrolyzed by the pyrolysis system (10) of the present invention may include waste plastics, solid fuel (SRF), marine waste, waste tires, etc. For example, the pyrolysis system (10) according to an embodiment of the present invention may be understood as a recycling system for waste plastics.

[0068] Below, the detailed configuration of each of the above-mentioned components and their corresponding effects are explained.

[0069] The collected waste (W) can be transported to the storage yard by a means of transportation (101), etc. The waste (W) can be adjusted to a suitable size and shape that can be fed into the waste pyrolysis system (10). Although not shown in the drawing, for example, the waste (W) fed into the waste pyrolysis system (10) can be further configured to adjust its size into pieces or particles that are crushed or pulverized to a set size.

[0070] Once the size adjustment of the waste (W) is completed, the waste can be fed into the waste supply device (100) via the feeding means (102). For example, the waste feeding means (102) can be composed of an automatic feeding device, a cargo crane, a jib crane, an overhead crane, a hoist, etc., and can feed the waste into the hopper (see FIG. 3, 110) of the waste supply device (100).

[0071] In addition, at least one pyrolysis device (200) is provided, and can receive waste (W) from the waste supply device (100) and pyrolyze it. Of course, two or more pyrolysis devices (200) can be provided. When a plurality of pyrolysis devices (200) are provided, each pyrolysis device (200) is connected in parallel so that it can operate independently of one another, and can be selectively operated in a cross-operation manner.

[0072] During the process of thermal decomposition of waste (W) in the pyrolysis device (200), combustible gas is generated. The combustible gas moves through the combustible gas transport line (L1), and the residue remaining after thermal decomposition is discharged through the residue removal device (900). The residue removal device (900) may be arranged to be linked with the waste transport device (910). For example, the waste transport device (910) may include an apron conveyor or the like, and may operate in conjunction with the residue removal device (900) during the process of discharge of residue.

[0073] The combustible gas transport line (L1) may be provided as a gas duct, for example, and may include a gas damper capable of opening and closing the transport path of the combustible gas. For example, by controlling the opening and closing of the gas damper, the combustible gas generated in the pyrolysis device (200) may flow into the combustible gas transport line (L1).

[0074] The combustible gas transfer line (L1) is connected to the emulsification heat exchanger (300) and can transfer combustible gas to the emulsification heat exchanger (300).

[0075] In addition, the emulsification heat exchanger (300) can condense combustible gas to produce pyrolysis oil. That is, in the emulsification heat exchanger (300), the combustible gas is separated into pyrolysis oil and non-condensable gas that is not condensed into pyrolysis oil. The pyrolysis oil can be transferred to the pyrolysis oil storage tank (400) through the pyrolysis oil transfer line (L2), and the non-condensable gas can be transferred to the hot air heater (500) through the non-condensable gas transfer line (L3).

[0076] The pyrolysis oil transfer line (L2) is connected to the pyrolysis oil storage tank (400). The pyrolysis oil transferred through the pyrolysis oil transfer line (L2) can be purified and used through various processes. The devices and processes described below are exemplary, and the pyrolysis oil generated in the emulsification heat exchanger (300) can be used in various ways.

[0077] In the non-condensable gas transfer line (L1), non-condensable gas that was not condensed into pyrolysis oil in the emulsification heat exchanger (300) is transferred to the hot air heater (500). The non-condensable gas transfer line (L1) may be equipped with a duct and a fan (301) for opening and closing control of the transfer line. These ducts and fans (301) are intended to assist the flow of gas and may be omitted in some cases, and their positions and numbers are not limited.

[0078] A gas generator (302) may be provided between the pyrolysis device (200) and the emulsification heat exchanger (300) on the non-condensable gas transfer line (L1). The gas generator (302) generates electricity using the non-condensable gas discharged from the emulsification heat exchanger (300), and after the generation, the non-condensable gas may be discharged to the hot air heater (500) because it contains waste heat. Of course, during the process of being transferred from the gas generator (302) to the hot air heater (500), it may be temporarily stored in a buffer tank (501) having a predetermined volume.

[0079] In addition, the exhaust gas heat exchanger (600) can recover waste heat generated from the pyrolysis device (200) as process water to produce steam. In addition, the combustion gas discharged after recovering waste heat in the exhaust gas heat exchanger (600) is discharged to the prevention facility through the combustion gas transfer line (L4).

[0080] The combustion gas transfer line (L4) may be connected to a semi-dry reactor (710). The combustion gas flows into the semi-dry reactor (710), reacts with the slaked lime slurry, and then flows into a bag filter (730) into which powdered slaked lime and activated carbon stored in a tank (720) are introduced to form ton bags. The ton bags formed in the semi-dry reactor (710) and / or the bag filter (730) may be transported and processed separately. The combustion gas thus processed may be discharged as exhaust gas through a stack (740). For this purpose, components such as a fan (750) and a duct may be appropriately provided at the front end of the stack (740).

[0081] In this embodiment, a semi-dry reactor (710), a bag filter (730), and a stack (740) are exemplarily presented as prevention facilities (700), but the spirit of the present invention is not limited thereto. For example, although not illustrated in the drawing, a scrubber, a selective catalytic reduction device (SCR), a selective non-catalytic reduction device (SNCR), a cyclone, etc. may be additionally provided as prevention facilities.

[0082] The hot air heater (500) burns non-condensable gas that was not condensed into pyrolysis oil in the emulsification heat exchanger (300) through the non-condensable gas transfer line (L3), and hot air is generated by the combustion heat, and as the combustion reaction continues, the temperature of the hot air can gradually increase. This hot air can be moved to the pyrolysis device (200) through the hot air supply line (L5).

[0083] In this way, by using the combustion heat of the hot air heater (500) to supply hot air to the pyrolysis device (300), the heat required for the pyrolysis of waste (W) can be provided, and by recycling the non-condensable gas generated in the emulsification heat exchanger (300) in the pyrolysis device (200), the heat source that was separately supplied to the pyrolysis device (200) for the pyrolysis of waste (W) can be saved.

[0084] In addition, the wax removal device (800) can remove at least a portion of the polymer material contained in the cooled combustible gas by exchanging heat between the combustible gas supplied from the thermal decomposition device (200) and the cooling water. Since these polymer materials undergo a phase change closer to a solid than a liquid even with a certain temperature change, filtering of the polymer material can be made possible.

[0085] And, the residue removal device (900) can continuously or intermittently discharge the residue discharged from the pyrolysis device (200). At this time, the residue removal device (900) can discharge the residue without opening the pyrolysis device (200) even when molten waste flows into the pyrolysis device (200) or a pyrolysis reaction occurs. For example, the residue removal device (900) can discharge the residue from the bottom of the pyrolysis device (200), and can discharge the residue while minimizing heat loss inside the pyrolysis device (200) by using a dry screw, a rotary valve, or the like. Therefore, the residue removal device (900) can prevent heat loss during the residue discharge process. In addition, the residue removal device (900) can prevent ash from flying during the residue discharge process, and has the effect of ensuring work safety because there is no need for a worker to enter the pyrolysis device (200).

[0086] Fig. 3 is a cross-sectional view showing a pyrolysis device of the waste pyrolysis system shown in Fig. 1, and Fig. 4 is a reference drawing schematically showing a hot air delivery unit of the pyrolysis device shown in Fig. 3.

[0087] Referring to FIGS. 3 and 4, a pyrolysis device (200) according to an embodiment of the present invention may include a body (210), a double jacket (220), and a hot air delivery unit (230).

[0088] First, the body (210) can receive at least a portion of molten waste from the aforementioned waste supply device (100) and thermally decompose it. The molten waste can be fed into the thermal decomposition device (200) to generate combustible gas. Furthermore, the body (210) can be increased or decreased in size or scale depending on the waste processing capacity.

[0089] Additionally, the body (210) can be connected to the hot air heater (500) through the first path (501) and the second path (502).

[0090] The first path (501) may be connected from the hot air heater (500) to the lower part of the body (210), and the second path (502) may be connected from the hot air heater (500) to the upper part of the body (210) compared to the first path (501). At this time, both the first path (501) and the second path (502) may be paths branched from the hot air heater (500).

[0091] In addition, the double jacket (220) can be arranged to wrap around the inner or outer surface of the body (210) to indirectly heat the inside of the body (210). In the present embodiment, the double jacket (220) is arranged to wrap around the outer surface of the body (210) as an example, but is not limited thereto and the double jacket (220) may be provided to wrap around the inner surface of the body (210).

[0092] The double jacket (220) can receive heated air from the hot air heater (500). That is, the hot air provided from the hot air heater (500) can be supplied to the double jacket (220) through the first path (501) and supply the hot air into the interior of the double jacket (220).

[0093] In addition, the hot air provided from the hot air heater (500) can be supplied to the hot air delivery unit (230) through the second path (502) and supply the hot air into the hot air delivery unit (230).

[0094] At this time, the hot air delivery unit (230) may include a first hot air delivery unit (231), a second hot air delivery unit (232), and a third hot air delivery unit (233).

[0095] The first hot air delivery unit (231) may be horizontally arranged inside the body (210) so as to communicate with the second path (502). Of course, the second path (502) may extend to the inside of the body (210) and then be connected to the first hot air delivery unit (231) inside the body (210).

[0096] Additionally, the second hot air delivery unit (232) can be arranged horizontally and vertically upwardly spaced from the first hot air delivery unit (231).

[0097] And, at least one third hot air delivery unit (233) can be arranged within the body (210). The third hot air delivery unit (232) can connect the first hot air delivery unit (231) and the second hot air delivery unit (232) to supply hot air introduced through the second path (502) to the entire hot air delivery unit (230). For example, the third hot air delivery unit (233) can be arranged in an area corresponding to an edge of each of the first and second hot air delivery units (231, 232) to connect the two edge areas. The third hot air delivery unit (233) can extend in a vertical direction and connect the first and second hot air delivery units (231, 232).

[0098] In FIGS. 3 and 4, only the first hot air delivery unit (231), the second hot air delivery unit (232), and two third hot air delivery units (233) connecting them (four can be connected on a plane) are shown, but when the size of the body (210) increases, more horizontal pipes and vertical pipes can be provided.

[0099] In addition, the first hot air delivery unit (231) and the second hot air delivery unit (232) may be formed in a shape corresponding to the cross-sectional shape of the body (210). That is, the body (210) may be formed in a roughly cylindrical shape, and the first hot air delivery unit (231) and the second hot air delivery unit (232) may be formed in a circular donut shape corresponding to this. Of course, if the shape of the body (210) is different from this, the shapes of the first hot air delivery unit (231) and the second hot air delivery unit (232) may also be formed in a shape corresponding thereto inside the body (210).

[0100] In addition, the first hot air delivery unit (231) may include at least one first sub-delivery unit (234) connecting the interior of the first hot air delivery unit (231). For example, a plurality of first sub-delivery units (234) may be provided in parallel with each other, and the number of first sub-delivery units (234) is not limited thereto. Of course, although not shown in the drawing, the first sub-delivery units (234) may be arranged more densely or in another pattern so as to provide a sufficient heat source required for indirect heating. For example, the plurality of first sub-delivery units (234) may be spaced apart from each other and extend in the same direction. In detail, the plurality of first sub-delivery units (234) may be spaced apart from adjacent first sub-delivery units (234) in a second direction and extend in the first direction. Here, the second direction may be a direction perpendicular to the first direction. That is, when viewed from above, the first hot air delivery unit (231) can be provided in a shape like a grill.

[0101] Additionally, the second hot air delivery unit (232) may be arranged to communicate with the double jacket (220). Of course, although not shown in the drawing, the first hot air delivery unit (231) may also be designed to communicate with the double jacket (220).

[0102] The second hot air delivery unit (232) is located above the first hot air delivery unit (231) and can be contacted first by the molten waste provided from the waste supply device (100). At this time, the second hot air delivery unit (232) may or may not include a sub-delivery unit like the first hot air delivery unit (231). For example, the second hot air delivery unit (232) may not include a sub-delivery unit and may be provided in a ring shape when viewed from above.

[0103] That is, when the hot air delivery unit according to the embodiment is viewed from above, the hot air delivery unit may appear as shown in FIGS. 4(a) and 4(b). Specifically, FIG. 4(a) is a drawing of the hot air delivery unit viewed from above, and FIG. 4(b) is a drawing of the hot air delivery unit viewed from one side. Referring to FIGS. 4(a) and 4(b), the hot air delivery units, for example, the first and second hot air delivery units (231, 232) disposed at the upper and lower portions, respectively, may have shapes and sizes corresponding to each other. Accordingly, the second hot air delivery unit (232) is visible from above, but the first hot air delivery unit (231) disposed below it may not be visible. In addition, the second hot air delivery unit (232) does not include a sub-delivery unit such as the first sub-delivery unit (234) of the first hot air delivery unit (231), so that the first sub-delivery unit (234) may be visible when viewed from above.

[0104] In addition, a hot air delivery unit (not shown) may be additionally arranged between the first hot air delivery unit (231) and the second hot air delivery unit (232). For example, a fourth hot air delivery unit (not shown) may be additionally arranged between the first and second hot air delivery units (231, 232). The fourth hot air delivery unit may be arranged at a position corresponding to the first and second hot air delivery units (231, 232) and may be provided with a corresponding size. In addition, the fourth hot air delivery unit may be connected to the third hot air delivery unit (233) between the first and second hot air delivery units (231, 232), and thus, the first to fourth hot air delivery units may all be connected to each other.

[0105] At this time, the fourth hot air delivery unit may include at least one fourth sub-delivery unit (not shown) connecting the inside of the fourth hot air delivery unit. For example, a plurality of fourth sub-delivery units may be provided in parallel with each other, and the number of fourth sub-delivery units is not limited thereto. Of course, although not shown in the drawing, the fourth sub-delivery units may be arranged more densely or in another pattern so as to provide a sufficient heat source required for indirect heating. For example, the plurality of fourth sub-delivery units may be spaced apart from each other and extend in the same direction. In detail, the plurality of fourth sub-delivery units may be spaced apart from adjacent fourth sub-delivery units in the fourth direction and extend in the third direction. Here, the fourth direction may be a direction perpendicular to the third direction. That is, when viewed from above, the fourth hot air delivery unit may be provided in a shape like a grill.

[0106] At this time, the first sub-transfer unit (234) may extend in the same direction as or in a different direction from the fourth sub-transfer unit. For example, the first transfer unit may extend in the first direction, and the fourth sub-transfer unit may extend in the third direction, and the first and third directions may be perpendicular to each other. That is, when viewed from above, the first sub-transfer unit (234) and the fourth sub-transfer unit may be arranged in a mesh form. Accordingly, the embodiment can increase the movement path of the provided molten waste, thereby providing a sufficient heat source required for indirect heating.

[0107] Additionally, the spacing between the first sub-transmission units (234) may be equal to or different from the spacing between the fourth sub-transmission units. For example, the spacing between adjacent fourth sub-transmission units may be greater than or equal to the spacing between adjacent first sub-transmission units (234). Accordingly, when some molten waste is supplied into the body (210), the waste is prevented from being blocked and stagnant in the fourth sub-transmission unit of the fourth hot air transmission unit, while at the same time providing a sufficient heat source to the waste.

[0108] In the description of the first to third hot air transfer units described above, the terms “horizontal” and “vertical” were used for convenience of explanation, but they are not limited thereto and may be arranged to have a predetermined incline with respect to the horizontal or vertical line, or may be connected in an “S” shape, a wave shape, a step shape, etc. so as to increase the heat transfer area.

[0109] And, the hot air passing through the double jacket (220) and the hot air delivery unit (230) can be discharged to the exhaust gas heat exchanger (600) described above.

[0110] In addition, the body (210) may include a lower hopper (211) disposed below the first hot air delivery unit (231), and a first scraper (212) disposed on the lower hopper (211) and configured to discharge residues on the upper portion of the lower hopper (211). In addition, the body may include a second scraper (214) disposed on the first hot air delivery unit (231) and configured to be spaced vertically upward from the lower hopper (211) and configured to discharge residues on the upper portion of the first hot air delivery unit (231). Each hopper has a hot plate shape and can heat molten waste, and residues among the waste pyrolyzed on the hopper can be discharged to a residue removal device (900), and combustible gases can be discharged to a wax removal device (800).

[0111] Figure 5 is a reference drawing schematically illustrating the wax removal device shown in Figure 2.

[0112] Referring to FIG. 5, the wax removal device (800) may include a body (810) and a cooling water jacket (820).

[0113] The body (810) can be supplied with combustible gas through an inlet (811) provided on one side and discharged through an outlet (812) provided on the other side. At this time, a heat exchange chamber (813) can be formed inside the body (810) between the inlet (811) and the outlet (812) in which the combustible gas can remain for a set period of time.

[0114] In addition, the cooling water jacket (820) can be arranged to surround the outside of the body (810) to provide a function of cooling the inside of the body (810).

[0115] When the body (810) is cooled in this way through the cooling water jacket (820), the polymer material contained in the combustible gas passing through the heat exchange chamber (813) can be discharged through the discharge port (814) provided at the bottom of the body (810) while coagulating. Since this polymer material is sensitive to temperature, it can be easily filtered in the wax removal device (800) because it undergoes a phase change according to the temperature change before being discharged through the outlet (812) after being introduced into the inlet (811) at a relatively high temperature and coagulates.

[0116] Of course, although not shown in the drawing, the body (810) of the wax removal device (800) may be provided with a door (not shown) that can be partially opened for maintenance purposes, as the coagulated wax may not be completely discharged through the discharge port (814) and may accumulate inside.

[0117] In addition, the cooling water jacket (820) may be provided with an auxiliary cooling water pipe (821) that is connected across the inside of the body (810). At least two auxiliary cooling water pipes (821) may be arranged in parallel in a vertical or horizontal direction, and may cool the inside of the heat exchange chamber (813) more quickly on the inside of the cooling water jacket (820). Although not shown in the drawing, a cooling fin pattern (not shown) that can increase the cooling area may be formed on the outer surface of the auxiliary cooling water pipe (821).

[0118] Due to this, when a combustible gas passes through the wax removal device (800), it has the effect of being processed into a higher quality gas.

[0119] Therefore, according to the waste pyrolysis device and the pyrolysis system equipped with the same according to an embodiment of the present invention, the waste to be supplied to the pyrolysis device can be heated and pressurized in a pre-molten state to continuously perform the waste treatment process, and since the molten waste is sequentially introduced inside the pyrolysis device and indirectly heated, a large amount of waste can be treated, and since the upper and lower parts are evenly heated through the hot air transfer unit inside the body, the heat can be evenly transferred to the inside of the waste, and the heat of the body can be prevented from rapidly diffusing to the outside through the double jacket, and since the wax removal device and the residue removal device are equipped, there is an effect of obtaining a higher quality gas while easily discharging the residue without stopping the operation of the pyrolysis device.

[0120] Figure 6 is a cross-sectional view illustrating the waste supply device shown in Figure 1.

[0121] Referring to FIG. 6, a waste supply device (100) according to an embodiment of the present invention may include a hopper (110), a heating chamber (120), a first heater (130), a pressurizing means (140), a first grate (150), a second grate (160), a damper (170), and a center rod (180).

[0122] Waste (W) is fed into the hopper (110) from the above-described feeding means. A predetermined space is formed inside the hopper (110) to temporarily accommodate the waste until the waste is completely moved to the heating chamber (120).

[0123] A damper (170) is provided at the bottom of the hopper (110). The damper (170) can selectively supply the waste supplied to the hopper (110) toward the heating chamber (120). That is, the damper (170) provides a door function that opens and closes the upper part of one side (121) of the heating chamber (120), thereby controlling the supply amount of the waste (W). In addition, the damper (170) can be applied as a sealed structure to one side (121) of the heating chamber (120) so as to maintain the pressure and temperature inside the heating chamber (120) by minimizing the inflow of air into the heating chamber (120). To this end, a sealing structure (not shown) may be additionally provided in the area between the damper (170) and the heating chamber (120) where they come into contact. For example, the damper (170) may be arranged to be able to slide horizontally. These dampers (170) can be driven to open and close by an actuator (not shown) using any one of electricity, hydraulics, and pneumatics.

[0124] Of course, although not shown in the drawing, the damper (170) may be applied with a door structure of a swing type or a valve structure that opens and closes by rotation in addition to the sliding door structure described above. In addition, the damper (170) may be periodically opened and closed so that the amount of waste (W) corresponding to the area to which the pressurizing means (140) pressurizes and transports the waste (W) may be supplied back to the heating chamber (120). Therefore, since the heating chamber (120) is periodically filled with the waste (W), the waste (W) may be continuously melted and the molten waste (Molten Waste; MW) may be supplied to the pyrolysis device (200).

[0125] In addition, the heating chamber (120) is formed to be long in the longitudinal direction and provides an internal space in which waste (W) supplied from the hopper (110) is received and heated and compressed.

[0126] The heating chamber (120) may be positioned in an area that does not overlap with the hopper (110). For example, referring to FIG. 6, the heating chamber (120) may be positioned in an area that does not vertically overlap with the hopper (110). Accordingly, the waste (W) supplied from the hopper (110) may be moved toward the heating chamber (120) by the pressurizing means (140) described below.

[0127] The heating chamber (120) may have a circular cross-section. Of course, the cross-section shape of the heating chamber (120) may also be formed into an ellipse or a polygonal shape larger than a triangle. In this embodiment, a circular cross-section shape of the heating chamber (120) is described as an example.

[0128] The heating chamber (120) is formed in a cylindrical shape and waste is accommodated in the internal space. A first heater (130) is provided to surround the heating chamber (120) so as to heat the waste.

[0129] Here, the first heater (130) is described as an example in which a high-frequency induction heating heater is applied that at least partially surrounds the outside or inside of the heating chamber (120). In addition to the high-frequency induction heating heater, a coil heater, a ceramic heater, etc. may be selectively applied. In addition to the first heater (130), if hot air supply is possible, a structure that supplies hot air to the inside may also be applied. The hot air supplied to the pyrolysis device (100, see FIG. 1) provided in the waste pyrolysis system (10) of the present invention may also be supplied. For example, the heating chamber (120) may be provided with a double structure, so that the heat of the pyrolysis device (100) may be supplied to heat the waste. In this case, the first heater (130) may be selectively operated or omitted depending on the control method.

[0130] When the heating chamber (120) has one end (121) as a starting point and the other end (122) as an ending point, the heating chamber (120) may include a first region (A1) and a second region (A2).

[0131] The lengths of the first region (A1) and the second region (A2) may be equal to or different from each other. For example, the length of the first region (A1) may be equal to or shorter than the length of the second region (A2). Specifically, the first region (A1) is a region having a length of about 20% to about 50% from one side (121) of the heating chamber (120), and the second region (A2) is a remaining length region from the end of the first region (A1) to the other side (122) of the heating chamber (120), which may be about 50% to about 80%.

[0132] The temperatures of the first and second regions (A1, A2) of the heating chamber (1200) may be about 200°C to about 500°C. At this time, the temperatures of the first and second regions (A1, A2) may be the same or different from each other. For example, the temperature of the second region adjacent to the first grate (150) may be higher than the temperature of the first region (A1). In detail, the temperature of the second region (A2) may be about 1.2 times or more the temperature of the first region (A1).

[0133] Accordingly, unmelted waste can be prevented from being caught in the first grate (150), and the waste can be easily melted and supplied to the discharge pipe (123) through the first grate (150). Preferably, the heating chamber (120) has a slim length, and the second region can be longer than the first region within the above-described range to effectively melt the waste, and the temperature of the second region can satisfy a range of about 1.2 to about 2.5 times the temperature of the first region.

[0134] A second grate (160) may optionally be further provided at the rear of the first grate (150) along the direction of movement of the waste.

[0135] The first grate (150) and the second grate (160) may be arranged so as to be spaced apart from each other by a set distance between the heating chamber (120) and the discharge pipe (123). This is to prevent the pressure of the molten waste (MW) from rapidly increasing as it passes through the first grate (150) and the second grate (160). Of course, although not shown in the drawing, the first grate (150) and the second grate (160) may be arranged side by side as long as the pressure of the waste passing through the first grate (150) and the second grate (160) does not exceed the set range.

[0136] Although not shown in the drawing, the first grate (150) and the second grate (160) may additionally heat the waste using heat from a separate heating means (not shown) or devices that provide hot air. For example, the first grate (150) and the second grate (160) may divide the waste passing through the first grate (150) and the second grate (160) into a plurality of regions by heating the waste passing through the first grate (150) and the second grate (160) using a separately provided heating means. At this time, the temperatures of the first grate (150) and the second grate (160) may be greater than or equal to the temperature of the second region. In addition, the temperature of the second grate (160) closer to the discharge pipe (123) may be heated to a temperature higher than the temperature of the first grate (150). Accordingly, unmelted waste may be prevented or minimized from being discharged through the discharge pipe (123).

[0137] In addition, the pressurizing means (140) is arranged at the front end of one side of the heating chamber (120) and can pressurize and move waste supplied to one side (121) of the heating chamber (120) toward the other side (122) of the heating chamber (120). This pressurizing means (140) can be applied as an actuator (not shown) using any one of electricity, hydraulics, and pneumatics.

[0138] Of course, when the pressurizing means (140) pressurizes and moves the waste, the damper (170) can be operated in a shielded state. During the operation of the pressurizing means (140), the waste inside the heating chamber (120) can be continuously heated and pressurized to melt into a gel-like state. Accordingly, the waste that was relatively close to a solid state on one side (121) inside the heating chamber (120) can gradually melt at a high temperature and become closer to a liquid state as it moves toward the other side (122).

[0139] A discharge pipe (123) is connected to the tip of the other side (122) of the heating chamber (120). The discharge pipe (123) may be formed in a shape that is bent vertically downward with respect to the length direction of the heating chamber (120). In addition, the waste (MW) discharged in a molten state from the discharge pipe (123) may be supplied to the pyrolysis device (200, see FIG. 1) described above.

[0140] And, the center rod (180) can be placed in the inner central region along the longitudinal direction of the heating chamber (120).

[0141] The center rod (180) may include a second heater (not shown) that heats the inner central region of the waste in the inner central region of the heating chamber (120). The second heater may be applied as one of a high-frequency induction heater, a coil heater, and a ceramic heater. It is more preferable that the second heater be a coil heater.

[0142] Accordingly, the center load (180) can ensure smooth heat transfer to the inner central region of the waste by reducing the overall thickness of the waste, and further has the effect of ensuring uniform heating throughout the entire region of the waste by heating the inner central region of the waste.

[0143] In addition, the center rod (180) may be arranged such that one end is adjacent to the pressurizing means (140), and the other end may be fixed to the center area of ​​the first grate (150). Of course, in a structure without the first grate (150), it may be fixed to the center of the other end (122) of the heating chamber (120).

[0144] Figure 7 is a reference drawing showing the grate of the waste supply device shown in Figure 6 according to an example.

[0145] Fig. 7 shows an example according to the shape of the first grate (150). In Fig. 7, only the shape of the first grate (150) is described as an example, and a redundant description according to the shape of the second grate (160) is omitted.

[0146] Fig. 7(a) illustrates a structure when a circular first grate (150) is applied when the heating chamber (see Fig. 6, 120) is formed in a cylindrical shape.

[0147] Although not shown in the drawing, as described above, the shape of the first grate (150) or the second grate (160) may be formed in a shape corresponding to the cross-sectional shape of the heating chamber (120).

[0148] The first grate (150) may include a first housing (151), a first frame (152), and a second frame (153).

[0149] The first housing (151) forms the entire outer perimeter of the first grate (150) and is formed to correspond to the shape of the tip of the other side (see Fig. 6, 122) of the heating chamber (120). The first housing (151) can be coupled to a rim or flange structure provided at the tip of the other side of the heating chamber. Then, the empty space inside the first housing (151) can be arranged to correspond to the inner space of the heating chamber (120).

[0150] The first frame (152) may be arranged in different directions from the second frame (153). At this time, the first frame (152) and the second frame (153) may be arranged to overlap each other at the center (154) of the first housing (151). The center (154) of the first housing (151) may be arranged to contact or be coupled with the tip of the center rod (180) to be described later.

[0151] Fig. 7(b) illustrates a structure when a first square grate (150') is applied when the heating chamber (120) is formed of a square duct structure.

[0152] The first grate (150') may include a first housing (151'), a first frame (152'), and a second frame (153').

[0153] A plurality of first frames (152') may be arranged in parallel, and a plurality of second frames (153') may be arranged in parallel along different directions from the first frame (152'). At this time, the first frame (152') and the second frame (153') may be arranged to overlap each other at the center (154') of the first housing (151'). The center (154') of the first housing (151') may be arranged to contact or be coupled with the tip of a center rod (180) to be described later.

[0154] At this time, the first frame (152') and the second frame (153') can be arranged to be perpendicular to each other at the point where they intersect.

[0155] Fig. 8 is a cross-sectional view showing the center load of the waste supply device shown in Fig. 6 in an enlarged form according to an embodiment.

[0156] Referring to FIG. 8, the center rod (180) may be positioned to penetrate the center area of ​​the pressurizing means (140). For example, the center rod (180) may penetrate the center of the pressurizing means (140) while the pressurizing means (140) moves into the heating chamber (120) while pressurizing the waste.

[0157] At this time, one end of the center rod (180) is formed to have a smaller cross-sectional area or diameter than the other end, so that when the pressurizing means (140) pressurizes the waste, one end of the center rod (180) can be inserted at least partially into the central area of ​​the pressurizing means (140).

[0158] Here, one end of the center rod (180) is formed with a small cross-sectional area or diameter to reduce friction or pressure when penetrating the center of the pressurizing means (140).

[0159] Figure 8(a) illustrates a structure in which one end of the center rod (180) is formed pointedly. One end of the center rod (180) may be formed as a slope with a constant slope up to the circumference of the center rod (180) with a sharp protrusion in the central region. Accordingly, friction or pressure can be reduced during the process in which the center rod (180) penetrates the pressurizing means (140).

[0160] Fig. 8(b) illustrates a structure in which one end of the center rod (180) is formed in a truncated cone shape. Although one end of the center rod (180) is formed to be less pointed than the structure of Fig. 8(a), it can also provide the effect of preventing one end of the center rod (180) from being deformed due to friction or pressure of waste.

[0161] As shown in Fig. 8(c), one end of the center rod (180) may be formed into a curved surface in which the diameter thereof gradually increases to the circumference of the center rod (180) and protrudes more sharply. Accordingly, friction or pressure may be minimized during the process in which the center rod (180) penetrates the pressurizing means (140).

[0162] FIG. 8(d) shows that one end of the center rod (180) may be formed into a curved surface. For example, one end of the center rod (180) may be formed into a curved surface in the shape of a sphere or an egg.

[0163] Therefore, according to the waste supply device according to an embodiment of the present invention, the waste to be supplied to the pyrolysis device can be heated and pressurized in a pre-molten state to continuously perform the waste treatment process, and since the center rod is arranged along the central area inside the heating chamber, the overall thickness of the waste can be reduced to less than half, so that heat transfer can be smoothly performed, and since the second heater is provided on the center rod, heating is performed in the central area of ​​the waste as well, so that uniform heating can be performed in the entire area of ​​the waste, and since the waste heated through the first heater is divided while passing through the grate, there is an effect of increasing the pyrolysis and stirring effect.

[0164] While specific embodiments have been illustrated and described above to illustrate the technical concept of the present invention, the present invention is not limited to the configuration and operation of the specific embodiments described above, and various modifications may be made without departing from the scope of the present invention. Therefore, such modifications should be considered within the scope of the present invention, and the scope of the present invention should be determined by the claims set forth below.

Claims

1. A waste supply device that heats and compresses waste and discharges it in a molten state; A waste pyrolysis device that receives molten waste from the above waste supply device and pyrolyzes it; and An emulsifying heat exchanger that cools condensable gas among the combustible gases generated in the above pyrolysis device to produce pyrolysis oil and discharges non-condensable gas; A waste pyrolysis system comprising:

2. In paragraph 1, The above waste pyrolysis device is, A body into which molten waste is injected from one side; A double jacket arranged to surround the inner or outer surface of the body, and indirectly heats the inside of the body by receiving hot air supplied from the outside and discharging it to the outside; and A hot air delivery unit connected to the above double jacket to supply hot air and thermally decompose waste introduced into the body; A waste pyrolysis system comprising:

3. In paragraph 2, The above body, A first path for transmitting the hot air supplied from the outside to the double jacket, A waste pyrolysis system comprising a second path spaced apart from the first path and transmitting hot air supplied from the outside to the hot air delivery unit.

4. In paragraph 3, The above hot air delivery unit is, A first hot air delivery unit arranged inside the body so as to communicate with the second path; A second hot air delivery unit vertically spaced from the first hot air delivery unit, A waste pyrolysis system comprising a plurality of third hot air delivery units provided to communicate with the first hot air delivery unit and the second hot air delivery unit.

5. In paragraph 4, The above hot air delivery unit is, The first hot air delivery unit and the first hot air delivery unit are formed to correspond to the cross-sectional shape of the body, A waste pyrolysis system, wherein the first hot air delivery unit includes a first sub-delivery unit connecting the interior.

6. In paragraph 4, The above hot air delivery unit is, A waste pyrolysis system, wherein the second hot air delivery unit is connected to the double jacket.

7. In paragraph 4, A lower hopper arranged below the first hot air delivery unit; A first scraper disposed on the lower hopper; A second scraper disposed on the first hot air delivery unit; A waste pyrolysis system further comprising:

8. In paragraph 1, A hot air heater that provides hot air through different paths to the above waste pyrolysis device; A pyrolysis oil storage tank that condenses combustible gas from the above-mentioned emulsification heat exchanger and stores the discharged pyrolysis oil; A prevention facility for treating exhaust gas discharged from the above waste pyrolysis device; A waste pyrolysis system further comprising:

9. In paragraph 1, A wax removal device interposed between the waste thermal decomposition device and the emulsification heat exchanger to remove coagulated high molecular substances while cooling combustible gas; A waste pyrolysis system further comprising:

10. In paragraph 8, A residue removal device that discharges residue remaining after pyrolysis in the waste pyrolysis device, and continuously or intermittently discharges the residue during the process in which the waste pyrolysis device pyrolyzes molten waste; A waste pyrolysis system further comprising:

11. In paragraph 1, The above waste supply device, A hopper into which waste is fed; A heating chamber in which waste introduced through the above hopper moves lengthwise inside and is heated and compressed; A first heater for heating waste accommodated inside the heating chamber; A pressurizing means arranged on one side of the heating chamber to pressurize and move waste flowing in from the hopper to the other side; and A center rod arranged in the inner central region along the longitudinal direction of the heating chamber; A waste pyrolysis system comprising:

12. In paragraph 11, The above center load is, A waste pyrolysis system comprising a second heater for heating a central region of the waste.

13. In paragraph 11, A waste pyrolysis system, wherein one end of the center rod is formed to have a smaller cross-sectional area or diameter than the other end, and when the pressurizing means pressurizes waste, one end of the center rod is at least partially inserted into the central area of ​​the pressurizing means.

14. In paragraph 12, A waste pyrolysis system further comprising a first grate for passing molten waste from the other side of the heating chamber and dividing it horizontally or vertically into a plurality of zones.

15. In paragraph 14, The above first great, A first housing coupled along the edge of the other side of the heating chamber, A plurality of first frames arranged in a first direction inside the first housing, A waste pyrolysis system comprising at least one or more second frames arranged in a second direction different from the first direction within the first housing.

16. In paragraph 15, The above first great, A waste pyrolysis system, wherein the other side of the center load is arranged to be supported by the first frame or the second frame in the central area.

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